The URL can be used to link to this page

Home My WebLink AboutDRC-2009-003543 - 0901a06880131231a^.^Si^' O^C- ^SCC'^i-00 36^5 White Mesa Uranium Mill Groundwater Monitoring Report state of Utah Groundwater Discharge Permit No. UGW370004 l" Quarter (January through March) 2009 Prepared by: Denison Mines (USA) Corp. Suite 950,1050 17* Street Denver CO 80265 May, 2009 White Mesa Uranium Mill Groundwater Monitoring Report State of Utah Groundwater Discharge Permit No UGW370004 Quarter January through March 2009 Prepared by Denison Mines USA Corp Suite 950 1050 17th Street Denver CO 80265 May 2009 INTRODUCTION This is the Routine Groundwater Monitoring Report as required under Part I.F of State of Utah Groundwater Discharge Permit No 370004 the Permit for the 1st quarter of 2009 the Quarter for Denison Mines USA Corps DUSAs White Mesa Uranium Mill the Mill As required under Parts I.E I.E.2 and I.E.4 of the Permit this Report includes all recorded field measurements and laboratory analyses for well monitoring conducted during the Quarter GROUNDWATER MONITORING 2.1 Samples and Measurements Taken During the Quarter map showing the location of all groundwater monitoring wells piezometers existing wells and temporary chloroform contaminant investigation wells is attached under Tab During the Quarter the following groundwater samples and measurements were taken during this reporting period Groundwater Compliance Monitoring Quarterly Groundwater Compliance Monitoring Quarterly Groundwater Compliance Monitoring is performed in the wells listed below pursuant to Part I.E.1 of the Permit MW-li MW-14 MW-26 formerly TW4-15 MW-32 formeriy TW4-l7 ii Accelerated Groundwater Monitoring In addition to the routine quarterly monitoring referred to above DUSA collected accelerated monthly samplings for select constituents at wells MW-14 MW-26 and MW-32 Also accelerated quarterly samples are collected at certain locations and for select constituents at wells MW-i MW-3 MW-5 MW-12 MW-iS MW-17 MW-18 and MW-l9 iii Quarterly Sampling for All New Wells Quarterly groundwater quality samples were collected from new monitoring wells in accordance with Part I.H of the Permit during the quarterly sampling event As such the following monitoring wells were sampled on those dates MW-20 MW-22 MW-23 MW-24 MW-25 MW-27 MW-28 WM-29 MW-30 MW-31 The sample collection dates for monthly samples occurred on January 20 and March 18 2009 respectively Routine quarterly semi-annual and accelerated quarterly sample collection occurred on February 11 2009 iv Parameters Analyzed All routine groundwater monitoring samples were analyzed for the parameters listed in Table and Part I.E .c 2ii of the Permit The accelerated monitoring samples were analyzed for the more limited specific parameters described in Section 2.4 of this report Groundwater Head Monitoring Depth to groundwater was measured in the following wells and/or piezometers pursuant to Part I.E.2 of the Permit The quarterly groundwater compliance monitoring wells listed in paragraph 2.1.a above were measured during the period of February 2-17 2009 depending on location ii Piezometers P-l P-2 P-3 P-4 and P-5 on February 17 2009 iii Existing monitoring well MW-4 on February 17 2009 and all of the temporary chloroform investigation wells on March 3-10 2009 iv In addition to the above depth to water measurements are routinely observed in conjunction with sampling events for all wells sampled during monthly quarterly and semi-annual monitoring efforts regardless of the sampling purpose 2.2 Field Data Sheets Attached under Tab are copies of all field data sheets where field data were recorded in association with the quarterly effort on February 11 2009 for the groundwater compliance monitoring wells listed in paragraph 2.1a above Attached under Tab are copies of all field data sheets where field data were recorded in association with monthly accelerated monitoring and sampling efforts during the month of January for monitoring wells MW-l4 MW-26 and MW-32 Attached under Tab are copies of all field data sheets where field data were recorded in association with monthly accelerated monitoring and sampling efforts during the month of March for monitoring wells MW-14 MW-26 and MW-32 2.3 Laboratory Results --Routine Groundwater Monitoring 2.3.1 Copy of Laboratory Results All analytical results provided by the Mills contract analytical laboratory the Analytical Laboratory There are four sets of laboratory analytical results included in this Report Samples collected for the January accelerated sampling were reported on February 11 2009 Tab Also included under this Tab are the results of duplicate sample of MW-32 MW-65 1-20-09 Because the wells in the GWDP sampling program have been equipped with dedicated pumps since the November 2007 sampling rinsate sample is no longer collected An analysis of field blank was included with the monthly sampling MW-60 1-21-09 Samples collected for the March accelerated sampling were reported on April 2009 Tab Also included under this tab are the results of analyses for duplicate sample of MW-32 MW-65 3-18-09 Because the wells in the GWDP sampling program had been equipped with dedicated pumps for the November 2007 sampling rinsate sample is no longer collected An analyses of field blank was included with the monthly sampling MW-60 3-18-09 Samples collected for the 1g Quarter and Accelerated Quarterly samples under the Permit were reported in five data sets dated March 17 23 24 and April 2009 Tab Also included under Tab are the results of analyses for duplicate samples of MW-32 and MW-22 MW-65 11-5-08 and MW-70 11-12-08 respectively field blank was collected for the quarterly sampling episode MW-60 2-5-09 Note Copies of laboratory QA/QC Summaries are included with the reported data at corresponding Tabs and 2.3.2 Analysis of Laboratory Results Under the Permit it is intended that background groundwater quality will be determined on well-by-well basis as defined by the mean plus second standard deviation concentration The Mill is currently in the process of working with the Utah Division of Radiation Control and its consultant URS to establish background including the mean plus second standard deviation for all of the constituents being sampled under the Permit Toward this end report entitled Background Groundwater Quality Report Existing Wells For Denison Mines USA Corp White Mesa Uranium mill Site San Juan County Utah Intera mc 2006 was transmitted to UDEQ on December 29 2006 In response to UDEQs review revised report was provided to UDEQ on October 2007 Revised Background Groundwater Quality Report Existing Wells For Denison Mines USA Corp White Mesa Uranium mill Site San Juan County Utah Intera mc 2007 In addition to the background report for existing wells DUSA has transmitted to UDEQ two addenda to the background report Evaluation of Available Pre-Operational and Regional Background Data Intera 4/19/07 and Background Groundwater quality Report New Wells For the Denison Mines USA Corp White Mesa Uranium Mill Site San Juan County Utah Intera 6/1/07 Finally in response to comments provided by UDEQ Denison issued revised Addendum to the Report Background Groundwater quality Report New Wells For the Denison Mines USA Corp White Mesa Uranium Mill Site San Juan County Utah on April 30 2008 Until such time as background is established the Permit requires that constituent concentrations in each monitoring well shall not exceed the Groundwater Compliance Limits GWCL5 set out in Table of the Permit DUSAs review of the analytical results for the Quarter indicates that concentrations of the following constituents in the following monitoring wells exceeded their respective GWCLs in Table of the Permit Table GWCL Exceedances for the Quarter Monitoring Well Water Class Constituent GWCL ug/L Sample Result ugfL MW-14_Class_III Manganese 400 2190 Uranium 15 60.5 MW-26_Class_III Manganese 400 1370 Uranium 15 43 Chloroform 35 1600 Dichlormethane 2.5 89 MW-32_Class_III Cadmium 2.5 2.98 Manganese 400 5170 Nickel 50 63 Iron 5500 9180 separate Notice of these exceedances has been submitted to the Executive Secretary on April 2009 pursuant to Part I.G.1.a of the Permit Unless the compliance status for any constituents in any wells is determined otherwise by the Executive Secretary the Mill will pursuant to Part I.G.l.b1 of the Permit commence or continue as the case may be accelerated sampling of each of the foregoing constituents in its respective well on monthly or quarterly basis as applicable as set forth below Table Accelerated Monitoring Requirements as of April 2009 Well Constituent Class Normal Frequency of Sampling Accelerated Frequency of Sampling Commencement of Accelerated Momtormg MW-i Class_Ii Tetrahydrofliran Semi-Annual Quarterly 4th Quarter 2005 Manganese Semi-Annual Quarterly Quarter 2006 Manganese Semi-Annual Quarterly 1u Quarter 2006 Selinium Semi-Annual Quarterly Quarter 2006 Thallium Semi-Annual Quarterly 4th Quarter 2005 Uranium Semi-Annual Quarterly Quarter 2005 Tetrahydrofliran Semi-Annual Quarterly 3t1 Quarter 2006 Manganese Semi-Annual Quarterly Quarter 2005 Fluoride Semi-Annual Quarterly 4th Quarter 2005 Tetrahydrofiiran Semi-Annual Quarterly Quarter 2006 Manganese Semi-Annual Quarterly Quarter 2005 Uranium Semi-Annual Quarterly Quarter 2005 Manganese Quarterly Monthly June 2005 Uranium Quarterly Monthly June 2005 Iii Selenium Semi-Annual Quarterly Quarter 2005 Uranium Semi-Annual Quarterly Quarter 2005 Well Class Constituent Normal Frequency of Sampling Accelerated Frequency of Sampling Commencement of Accelerated Monitoring MW-17 Class_III Uranium Semi-Annual Quarterly Quarter 2005 Thalium Semi-Annual Quarterly Quarter 2006 MW-18 Class_II Thallium Semi-Annual Quarterly 4tt Quarter 2005 Uranium Semi-Annual Quarterly 4th Quarter 2005 Manganese Semi-Annual Quarterly January 2008 MW-19 Class_II Fluoride Semi-Annual Quarterly 1St Quarter 2006 Selenium Semi-Annual Quarterly 4th Quarter 2005 Thallium Semi-Annual Quarterly itt Quarter 2006 Uranium Semi-Annual Quarterly 4th Quarter 2005 Nitrate Semi-Annual Quarterly 1St Quarter 2009 MW-26 Class_III Manganese Quarterly Monthly June 2005 Uranium Quarterly Monthly June 2005 Chloroform Quarterly Monthly June 2005 Dichloromethane Quarterly Monthly September 2005 Class_III Cadmium Quarterly Monthly June 2005 Iron Quarterly Monthly June 2005 Manganese Quarterly Monthly June 2005 Nickel Quarterly Monthly June 2005 Gross Alpha Quarterly Monthly March 2007 The background constituent concentrations for all of the new monitoring wells MW-3A MW-23 MW-24 MW-25 MW-27 MW-28 MW-29 MW-30 and MW-3 through eight quarters of sampling pursuant to Part I.H.4 of the Permit has been evaluated and reported to UDEQ under the title Background Groundwater quality Report New Wells For the Denison Mines USA Corp White Mesa Uranium Mill Site San Juan County Utah Intera 6/1/07 and its April 30 2008 Addendum This report is currently under review at UDEQ and as such the GWCLs for these wells have not been determined and included in the Permit Accordingly it is premature to determine whether or not any of the sampling results for this Quarter exceed any Permit limits for any constituents in those wells 2.4 Laboratory Results Accelerated Monitoring The analytical results for the accelerated monitoring of the various constituents in certain monitoring wells for the months of January and March 2009 are provided at Tabs and respectively The results of the 1st Quarter of 2009 quarterly accelerated sampling are included under Tab The following table summarizes accelerated monitoring results to date Table Summary of Accelerated Monitoring Results to Date Monitoring Well Water Class Constituent GWCL ugIL Sample Event Sample Result ugfL MW-i_Class It Tetrahydrothran 11.5 Qtr 2005 85 4th2005 58 ftQtr2006 48 2Qtr 2006 60 31Qtr 2006 26 4th2006 16 PQtr2007 14 Qtr 2007 NA 3rdQft.2007 15 4th2007 16 VtQtr2008 2.0 Qtr 2008 2.6 Qtr 2008 3.2 4th28 1S Qtr 2009 6.4 Manganese 200 4th Qtr 2005 215 PtQtr2006 220 Qtr 2006 230 3rdQfr2006 216 4th2oo6 198 1Qfr2007 229 Qtr 2007 NA 3Qtr 2007 30 4th2007 Is 1Qtr2008 10 2th1 Qtr 2008 66 3Qtr 2008 70 4thQ.28 68 1Qtr.2009 83 MW-3_Class LEt Thallium 1.00 3t Qtr 2005 1.60 4thQj.5 1.14 ._________________VtQtr2006 1.13 2nd Qtr 2006 0.99 3rdQ..2Q6 1.11 4thfr2006 1.16 Pt Qtr 2007 0.99 Qtr 2007 NA 3rd2007 1.19 4th Qtr 2007 1.15 1TM Qtr 2008 0.90 Qtr 2008 0.86 3rd Qtr 2008 0.85 4th Qtr 2008 0.93 Monitoring Well Water Class Consttuent GWCL ngIL Sample Event Sample Result ug/L MW-3 Contd Thallium 1.00 1st Qtr 2009 0.89 Uranium 15 Qtr 2005 35.90 4th Qtr 2005 30.90 ltQtr2006 39.1 Qtr 2006 27.6 3rd Qtr 2006 32.0 4th Qt 2006 28.2 ltQtr2008 35.6 itt Qtr 2007 30.2 Qtr 2007 NA 3rd Qt 2007 17.4 4th Qtr 2007 39.4 lttQtr2008 35.6 Qtr 2008 ND 3rd Qtr 2008 28.5 4th Qtr 2008 23.8 Qtr 2009 27.7 Manganese 400 Qtr 2005 732 Qtr 2006 1640 Qtr 2006 631 3rd Qtr 2006 1370 Qtr 2006 682 Qtr 2007 848 Qtr 2007 NA 3rd Qtr 2007 199 4th Qtr 2007 1950 Qtr 2008 1330 Qtr 2008 810 3rdQt2008 960 4th Qtr 2008 813 Itt Qtr 2009 468 Selenium 25 Qtr 2006 25.4 3rdQfr2006 16.8 4th Qtr 2006 27.9 Qtr 2007 20.1 Qtr 2007 NA 3rd Qtr 2007 33.6 Qtr 2007 8.9 1Qtr2008 13.8 Qtr 2008 20.1 3rd Qt 2008 19.2 4th Qtr 2008 26.5 itt Qtr 2009 20.7 Tetrahydrofliran 23 2nd Qtr 2006 26 Qtr 2006 46 Qtr 2006 11 1tt Qtr2007 11 Qtr 2007 NA 3rdQft2007 ND 4th Qtr 2007 Qtr 2008 2d Qtr 2008 ND 6.5 2.0 Well Constituent Class GWCL ugIL Sample Event Sample Result ug/L Contd Tetrahydrofiiran 23 3X Qtr 2008 2.0 4th Qtr 2008 2.0 Pt Qtr 2009 3.8 Class II Manganese 200 Qtr 2005 250 4t1 Qtr2005 280 lYt Qtr 2006 259 Qtr 2006 228 3rdQtr2006 237 4thQw2006 228 1tQtr2007 281 Qtr 2007 NA 3rd Qtr 2007 134 Qtr 2007 142 1t Qtr 2008 203 Qtr 2008 258 3rdQtr2008 298 Qtr 2008 230 Qtr 2009 154 Fluoride 1.00 mg/L Qtr 2005 1.3 mg/L 4th Qtr 2005 1.0 mg/L 1st Qtr 2006 0.9 mg/L Qtr 2006 1.0 mg/L Qtr 2006 0.9 mg/L 4th Qtr 2006 1.1 mg/L 15t Qtr 2007 1.1 mg/L Qtr 2007 NA 3rd Qtr 2007 1.2 mg/i Qtr 2007 1.0mg/L 1st Qtr 2008 1.0mg/L Qtr 2008 0.9mg/L 3rd Qtr 2008 .0nig/L 4th Qtr 2008 1.0mg/L 1st Qtr 2009 1.0 mg/L Tetrahydrofitran 11.50 Qtr 2005 13 lStQtr2006 10 Qtr 2006 7.8 3rdQtr2006 ND 4t1 Qtr 2006 ND 1St Qtr 2007 ND 2nd Qtr 2007 NA 3rd Qtr 2007 ND 4Qtr 2007 10 1st Qtr 2008 9.2 Qtr 2008 10 3rd Qtr 2008 6.6 4th Qtr 2008 8.5 1st Qtr 2009 4.2 Manganese 400 Qtr 2005 420 4th Qtr 2005 15t Qtr 2006 3Qtr 2006 27 17 290 10 Monitoring Well Constituent Water Class GWCLug Sample Result Sample Event ugL MW-12 Contd Manganese 400 4th Qtr 2006 92 1st Qtr 2007 279 21u Qtr 2007 NA 3Qt 2007 57 4th Qt 2007 60 Pt Qtr 2008 29 2111 Qtr 2008 32 3Qtr 2008 19 4th Qtr 2008 16 1SE Qtr 2009 17 Uranium 15 2nd Qtr 2005 15.30 4th Qtr 2005 16.50 its Qtr 2006 ND Qtr 2006 20.9 3rd Qtr 2006 23.5 4aQtr2006 19.8 ltQtr2007 19.4 Qtr 2007 NA 3rd Qtr 2007 8.68 4111 Qtr 2007 19.2 lttQtr2008 16.8 Qtr 2008 16.7 3rdQtr2008 17.8 4th Qtr 2008 16.9 lttQtr 2009 18.0 Tetrahydroffiran 23 2111 Qtr 2005 24 4th Qtr 2005 12 151 Qtr 2006 ND Qtr 2006 16 3rd Qtr 2006 18 4th Qtr 2006 ND lttQtr2007 38 Qtr 2007 NA 3rd Qtr 2007 ND 4thQt2007 ND itt Qtr 2008 2.0 2nd Qtr 2008 3.0 Qtr 2008 2.0 4th Qtr 2008 2.0 itt Qtr 2009 3.6 MW-14 Class Ill Manganese 400 itt Qtr 2005 1860 June2005 1840 July 2005 2000 Aug 2005 1900 Sept.2005 2110 Oct 2005 1950 Nov 2005 1880 Dec 2005 1960 Jan 2006 2060 Feb 2006 1940 Mar 2006 2070 April2006 2100 11 Monitoring Well Water Class Constituent GWCL ug/L Sample Result Sample Event ugIL MW-14 Contd Manganese 400 May 2006 2000 June2006 1650 July 2006 1590 Aug 2006 1870 Sept 2006 1860 Oct 2006 1960 Nov 2006 1790 Dec 2006 1960 Jan 2007 1970 Feb.2007 1940 Mar 2007 1930 April 2007 2020 May2007 1940 June2007 NA July2007 NA Aug.2007 2010 Sept 2007 2060 Oct 2007 2120 Nov 2007 2380 Dec 2007 2290 Jan 2008 2200 Feb 2008 2080 Mar 2008 2280 April2008 2160 May2008 2420 June2008 2290 July2008 2150 Aug 2008 2020 Sept 2008 2030 Oct.2008 2110 Nov.2008 2150 Dec 2008 2300 Jan 2009 2060 Feb 2009 2190 Mar 2009 2150 Uranium Qtr 2005 65.1 June2005 58.9 July2005 65.5 Aug 2005 66.5 Sept 2005 67.5 ___________________Oct 2005 70.1 Nov 2005 69.7 Dec 2005 67.6 Jan 2006 74.8 Feb 2006 69.2 Mar 2006 69.4 April 2006 64.0 May 2006 70.3 June2006 69.2 July 2006 71.8 Aug 2006 64.7 Sept 2006 69.0 12 Monitoring Well Water Class Constituent MW-14 Contd Uranium GWCL ug/L Sample Event 15 Oct 2006 Sample Result ugIL 66.4 Nov 2006 65.5 Dec 2006 68.4 Jan 2007 24.9 Feb 2007 43.8 Mar 2007 42.8 April2007 18.8 May2007 62.4 June 2007 NA July2007 NA August 2007 ND September 2007 70.5 October 2007 68.6 November 2007 61.6 December 2007 60.7 January 2008 65.1 February 2008 64.1 March2008 ND April2008 61.8 May2008 62.6 June2008 61.3 July 2008 64.8 Aug 2008 62.4 Sept 2008 63.0 Oct 2008 65.8 Nov 2008 63.4 Dec 2008 48.3 Jan 2009 68.9 Feb 2009 60.5 Mar 2009 57.4 MW-15 Class III Selenium 25 Qtr 2005 79 4th Qtr 2005 92.5 11Qtr 2006 102 2n1 Qtr 2006 117 3rd Qtr 2006 112 Qtr 2006 112 luQtr2007 89.6 Qtr 2007 NA 3rdQtr2007 94 Qtr 2007 94 ltQtr2008 113 2Qtr 2008 106 3rdQtr2008 118 4thQ2008 ill ltQtr2009 110 Uranium 15 Qtr 2005 45.3 4Qtr 2005 47.7 151 Qtr 2006 50.4 2n Qtr 2006 47.8 3rdQt2006 4thQt 2006 151 Qtr 2007 50.1 51.6 46.5 13 Monitoring Well Water Class Constituent GWCL ugIL Sample Event Sample Result ugIL MW-is Contd Uranium 15 Qtr 2007 NA 3rd Qtr 2007 28.6 4dt Qtr 2007 51.0 PtQtr2008 48.3 2nd Qtr 2008 43.9 3rd Qtr 2008 45.7 4th Qtr 2008 47.0 1st Qtr 2009 45.7 MW-i7_Class_III Uranium 15 2nd Qtr 2005 23.4 4th Qtr 2005 31.2 1st Qtr 2006 28.2 Qtr 2006 32.2 3rd Qt 2006 30.6 4th Qtr 2006 30.2 l5tQtr2007 23.4 _________________2Qtr2007 18.2 3rd Qtr 2007 20.1 4th Qtr 2007 31.0 Vt Qtr 2008 28.3 Qtr 2008 29.4 3rd Qtr 2008 28.9 4th Qtr 2008 26.0 15t Qtr 2009 28.7 Thallium 1.0 l5tQtr2009 0.57 MW-i8 Class ii Thallium 0.5 Qtr 2005 1.0 4th Qtr 2005 0.95 1st Qtr 2006 1.46 Qtr 2006 1.3 3rd Qtr 2006 0.83 4th Qt 2006 1.01 15t Qtr 2007 1.85 Qtr 2007 NA 3rd Qtr 2007 0.96 4th Qtr 2007 0.89 VtQtr2008 1.11 Qtr 2008 1.34 3rd Qtr 2008 1.33 ___________________4th Qtr 2008 1.43 15t Qtr 2009 1.53 MW-i8 Class ii Uranium 7.5 Qtr 2005 39 4th Qtr 2005 39 1tQtr2006 42.6 Qtr 2006 32.2 3rd Qtr 2006 39.6 4th Qtr 2006 42.2 1st Qtr 2007 46.9 Qtr 2007 NA 3rd Qtr 2007 36.5 4th QIr 2007 1St Qtr 2008 Qtr 2008 39.2 42.4 44.8 14 Monitoring Well Water Class Constituent GWCL ug/L Sample Event Sample Result ug/L MW-iS Contd Uranium 7.5 3rd Qtr 2008 41.4 4th Qtr 2008 41.0 Vt Qtr 2009 39.4 Manganese 200 VQtr 2008 154 2Qtr 2008 119 __________________3rdQtr2008 136 4th Qtr 2008 125 1SEQ2009 121 MW-19 Class II Fluoride 1.0 mg/L 4th Qtr 2005 1.1 mg/L 2nd Qtr 2006 1.1 mg/L 3rd Qtr 2006 1.1 mg/L 4th Qtr 2006 1.3 mg/L Qtr 2007 1.4 mgIL Qtr 2007 NA 3rd Qtr 2007 1.3mg/L 4th Qtr 2007 1.1 mg/L VQtr2008 1.1mg/L Qtr 2008 1.1mg/L 3rd Qtr 2008 1.1mg/L Qtr 2008 1.1mg/L Qtr 2009 1.1 mg/L Selenium 12.5 Qtr 2005 18 4th Qt 2005 12.3 Qtr 2006 14.3 2Qtr 2006 12.0 3rd Qt 2006 12.0 4th Qtr 2006 11.2 VQtr2007 11.1 Qtr 2007 NA 3rd Qtr 2007 11.9 4th Qt 2007 10.8 VQtr2008 10.6 Qtr 2008 10.2 3rd Qtr 2008 9.2 4th Qt 2008 9.9 Qtr 2009 9.6 Thallium 0.5 4th Qtr 2005 0.57 VQtr2006 ND 211dQtr2006 0.7 3rd Qt 2006 0.55 4th Qtr 2006 0.68 Vt Qtr 2007 ND Qtr 2007 NA 3rd Qtr 2007 0.53 Qtr 2007 0.52 Qtr 2008 0.52 2Qtr2008 ND 3rdQft2008 ND 4th Qtr 2008 ND VQtr 2009 ND Uranium Qtr 2005 11.6 4Qtr2005 11.3 15 Monitoring Well Water Class Constituent GWCL ugIL Sample Event Sample ResuLt ugIL 1St Qtr 2006 12.8 MW-19 Contd Uranium 7.5 2fldQft2006 11.5 3rdQtr2006 8.52 4th Qtr 2006 10.1 PtQtr2007 9.37 Qtr 2007 NA 3rd Qtr 2007 7.76 4th Qtr 2007 7.53 Pt Qtr 2008 7.32 Qtr 2008 6.76 3rd Qt 2008 6.8 4th Qtr 2008 6.51 1st Qtr 2009 6.52 Nitrate-Nitrite as 2.5 1st Qtr 2009 2.4 MW-26_Class_II Manganese 400 1St Qtr 2005 1350 June2005 956 July2005 1100 Aug.2005 1430 Sept.2005 1160 Oct.2005 1410 Nov 2005 949 Dec 2005 1030 Jan.2006 951 Feb 2006 874 Mar 2006 1210 April2006 1100 May2006 1280 June2006 1300 July 2006 95 Aug 2006 902 Sept 2006 1330 Oct 2006 1610 Nov 2006 1500 Dec 2006 1080 Jan 2007 769 Feb.2007 979 Mar.2007 1130 April 2007 1410 May 2007 910 June 2007 1230 July2007 1280 Aug 2007 728 Sept 2007 NS Oct 2007 1190 Nov 2007 1150 Dec.2007 1410 January 2008 853 February 2008 1330 March2008 1390 April2008 1010 May2008 1170 16 Monitoring WeU Water Class Constituent GWCL ug/L Sample Event Sample Result ug/L MW-26 Contd Manganese 400 June 2008 1130 July2008 1110 Aug 2008 1180 Sept 2008 1140 Oct 2008 1550 Nov 2008 1260 Dec 2008 1120 Jan 2009 1040 Feb.2009 1370 Mar 2009 1600 Uranium 15 Vt Qtr 2005 22.4 June2005 9.5 July2005 12.6 Aug 2005 26.0 Sept 2005 17.4 Oct 2005 22.7 Nov.2005 12.1 Dec 2005 12.3 Jan 2006 10.7 Feb 2006 9.9 Mar.2006 17.9 April2006 14 May2006 2.5 June 2006 24.6 July2006 17.6 Aug.2006 10.5 Sept 2006 23.0 Oct 2006 34.7 Nov 2006 32.6 Dec 2006 20.9 Jan 2007 22.6 Feb.2007 44.2 Mar 2007 42.8 April 2007 36.4 May 2007 119 June 2007 24.5 July2007 38.6 August2007 21.2 September 2007 NS October 2007 47.0 November 2007 42.0 December 2007 47.6 January 2008 20.1 February 2008 59.2 March 2008 46.3 April 2008 17.2 May 2008 20.7 June2008 21.7 July2008 23.4 Aug.2008 27.1 Sept 2008 29.4 Oct 2008 60.4 17 Monitoring Well Water Class Constituent GWCL ugfL Sample Event Sample Result ugIL MW-26 Contd Uranium 15 Nov 2008 54.0 Dee 2008 62.1 Jan 2009 52.6 Feb 2009 43.0 Mar 2009 58.3 Chloroform 35 Qtr 2005 230 June2005 430 July2005 260 Aug 2005 780 Sept.2005 810 Oct 2005 960 Nov.2005 1100 Dec 2005 1200 Jan 2006 1300 Feb 2006 860 Mar 2006 1200 April 2006 1200 May2006 1100 June2006 260 July2006 7800 Aug 2006 980 Sept 2006 1200 Oct 2006 1400 Nov 2006 950 Dec.2006 1100 Jan 2007 5700 Feb.2007 4400 Mar 2007 1600 April 2007 2100 May 2007 2400 June 2007 660 July2007 1100 August2007 920 September 2007 NS October2007 820 November 2007 1400 December 2007 1400 January 2008 830 February 2008 580 March2008 1300 April2008 1600 May2008 1200 June2008 2000 July 2008 1600 Aug 2008 1300 Sept 2008 460 Oct 2008 630 Nov 2008 950 Dee 2008 1300 Jan 2009 1200 Feb.2009 1600 Mar 2009 1200 18 Monitoring Well Water Class Constituent GWCL ugfL Sample Event Sample Result ug/L MW-26 Contd Dichioromethane 2.5 June 2005 5.4 Aug.2005 11.0 Sept 2005 5.9 Oct 2005 9.8 Nov 2005 7.6 Dec 2005 12 Jan 2006 6.9 Feb 2006 4.8 Mar 2006 4.6 April 2006 14 May 2006 11 June 2006 2.5 July 2006 ND Aug 2006 12 Sept 2006 25 Oct 2006 31 Nov 2006 15 Dec 2006 2.6 Jan 2007 ND Feb.2007 25 Mar 2007 26 April 2007 33 May 2007 28 June 2007 37 July2007 14 August2007 9.0 September 2007 NS October 2007 1.2 November2007 18 December 2007 22 January 2008 15 February 2008 15 March2008 66 April 2008 47 May2008 33 June2008 110 July2008 82 Aug 2008 84 Sept.2008 11 Oct 2008 9.4 Nov 2008 17 Dec 2008 60 Jan 2009 69 Feb 2009 89 Mar 2009 37 Tetrahydrohiran 23 Qtr 2005 55 Jan 2006 ND Feb 2006 ND Mar 2006 ND April 2006 ND May2006 ND June2006 ND 19 Monitoring Well Water Class Constituent GWCL uglL Sample Event Sample Result ug/L MW-26 Contd Tetrahydrofliran 23 July 2006 ND Aug 2006 ND Sept 2006 ND Oct 2006 ND Nov 2006 ND Dec 2006 ND Jan 2007 ND Feb.2007 ND Mar 2007 ND April 2007 ND May 2007 ND June 2007 ND July 2007 ND August 2007 ND September 2007 NS October 2007 ND November 2007 ND December 2007 ND MW-32 Cadmium 2.5 Vt Qtr 2005 23.8 June2005 1.7 July 2005 2.1 Aug.2005 2.75 Sept 2005 2.95 Oct.2005 2.16 Nov 2005 2.07 Dec 2005 1.0 Jan.2006 1.14 Feb 2006 2.32 Mar 2006 2.58 April 2006 2.96 May2006 1.84 June2006 0.8 July 2006 3.0 Aug.2006 1.44 Sept 2006 0.96 Oct 2006 ND Nov 2006 0.9 Dec 2006 1.44 Jan 2007 3.0 Feb.2007 ND Mar 2007 2.42 April 2007 2.24 May2007 6.18 June 2007 ND July 2007 2.83 August 2007 1.82 September 2007 1.18 October 2007 1.20 November 2007 1.47 December 2007 1.81 January 2008 1.32 February 2008 ND 20 Monitoring Well Water Class Constituent GWCL ugfL Sample Event Sample Result ugIL MW-32 Contd Cadmium 2.5 March 2008 1.90 April 2008 3.0 May2008 2.08 June2008 2.21 July 2008 2.4 Aug 2008 2.77 Sept 2008 2.45 Oct 2008 2.53 Nov 2008 2.86 Dee 2008 2.61 Jan 2009 2.64 Feb 2009 2.98 Mar 2009 3.0 Manganese 400 1st Qtr 2005 3740 June2005 4220 July2005 4720 Aug 2005 4670 Sept 2005 4580 Oct 2005 4590 Nov 2005 4530 Dec 2005 4340 Jan 2006 5090 Feb 2006 4160 Mar 2006 5090 April 2006 5070 May 2006 4840 June 2006 4680 July 2006 4540 Aug.2006 5160 Sept 2006 4690 Oct 2006 4790 Nov 2006 4830 Dec 2006 4920 Jan 2007 5040 Feb.2007 4940 Mar 2007 4920 April 2007 5450 May 2007 4920 June 2007 5470 July 2007 5490 August 2007 4820 September 2007 4790 October2007 5170 November 2007 5583 December 2007 5050 January 2008 4950 February 2008 5010 March2008 5660 April 2008 5500 May2008 5810 June2008 5400 July2008 5160 21 Monitoring Well Water Class Constituent GWCL ugIL Sample Event Sample Result ug/L MW-32 Contd Manganese 400 Aug 2008 5240 Sept 2008 5130 Oct 2008 5550 Nov 2008 5390 Dec 2008 5540 Jan 2009 4850 Feb 2009 5170 Mar.2009 5140 Nickel 50 Vt Qtr 2005 71.0 June2005 54.0 July 2005 63.0 Aug 2005 64.0 Sept 2005 67.0 Oct 2005 63.0 Nov 2005 62.0 Dec.2005 51.0 Jan 2006 69.0 Feb 2006 54.0 Mar 2006 68.0 April 2006 70.0 May 2006 64.0 June 2006 52 July 2006 74 Aug 2006 59 Sept 2006 53 Oct 2006 12 Nov 2006 56 Dec 2006 62 Jan 2007 59 Feb.2007 51 Mar 2007 74 April 2007 64 May 2007 127 June 2007 94 July2007 85 August2007 65 September 2007 62 October 2007 67 November2007 57 December 2007 66 January 2008 62 February 2008 59 March 2008 59 April2008 61 May2008 64 June2008 62 July2008 65 Aug 2008 66 Sept 2008 60 Oct 2008 62 Nov 2008 66 Dec 2008 59 22 Monitoring Well Water Class Constituent GWCL ugfL Sample Event Sample Result ugIL MW-32 Contd Nickel 50 Jan 2009 58 Feb 2009 63 Mar 2009 64 Iron Jan.2009 9130 Feb.2009 9180 Mar 2009 8450 Gross Alpha Jan 2009 5.2 1-1.0 Feb 2009 5.5 1-0.7 Mar 2009 5.0 1-0.7 2.5 Depth To Groundwater Readings And Water Table Contour Map listing of groundwater level readings for the Quarter shown as depth to groundwater in feet is included under Tab Also included under Tab is water table contour map which provides the location and identity of all of the wells and piezometers listed in items 2.1b above for which depth to groundwater is recorded The groundwater elevation at each well and piezometer measured in feet above mean sea level and isocontour lines to delineate groundwater flow directions observed during the Quarters sampling event is displayed on the map 2.6 Quality Assurance Evaluation And Data Validation Quality assurance evaluation and data validation procedures in effect at the time of sampling were followed These involve three basic types of evaluations field QC checks Analytical Laboratory QA checks and checks performed by DUSA personnel as described below 2.6.1 Field QC Checks The following QC samples were generated by Mill personnel and submitted to the Analytical Laboratory in order to assess the quality of data resulting from the field sampling program January Monthly Accelerated Sampling -One duplicate sample of MW-32 MW-65 collected 1-20-09 -One field blank MW-60 collected 1-21-09 -One trip blank provided by the Analytical Laboratory and sent with the samples received by the Analytical Laboratory on 1/22/09 March Monthly Accelerated Sampling -One duplicate sample of MW-32 MW-65 collected 3-18-09 -One field blank MW-60 collected 3-18-09 -One trip blank provided by the Analytical Laboratory and sent with the samples received by the Analytical Laboratory on 3-20-09 23 February Quarterly/Accelerated Sampling One duplicate sample of MW-32 MW-65 collected 2-2-09 One field blank MW-60 collected 2-5-09 -Four trip blanks provided by the Analytical Laboratory and sent with the samples received by the Analytical Laboratory on 2-5 2-6 2-11 and 2-13-09 These QC samples were sent blind to the Analytical Laboratory and analyzed for the same parameters as permit-required samples 2.6.2 Analytical Laboratory QA/OC Procedures The Analytical Laboratory has provided summary reports of the analytical quality controllquality assurance QA/QC measurements necessary to maintain conformance with NELAC certification and reporting protocol The Analytical Laboratory QA/QC Summary Reports including copies of the Mills Chain of Custody and Analytical Request Record forms for each set of Analytical Results follow the analytical results under Tabs to 2.6.3 Mill OA Manager Review The Mill QA Manager which for the purposes of this Report was DUSAs Manager of Environmental Affairs performed three types of reviews determination of whether Mill sampling personnel followed Mill sampling procedures review of the results from the Field QC Checks and review of the Analytical Laboratory QAIQC analysis The results of the QA Managers review are discussed below Adherence to Mill Sampling SOPs On review of adherence by Mill personnel to the existing sampling standard operating procedures SOPs the QA Manager observed that QA/QC requirements established in the Groundwater Monitoring Quality Assurance Plan were being adhered to and that the SOPs were implemented except that water level measurements were not taken contemporaneously within 5-day period according to the QAP The root cause of this issue was outlined in correspondence to the UDEQ dated May 22 2009 and the steps taken to resolve this matter were described in that correspondence and are repeated here in Section 2.6.3.d below Resultsfromfleld QC checks January Sampling The results of duplicate QC checks for the January sampling indicated that the duplicated samples were within the Relative Percent Difference goal of 20%see Table The information from the Laboratory QA/QC Summary Report indicates that RPD and recovery data at the Laboratory were within acceptable limits as well 24 All samples were received within acceptable temperature specification and holding time requirements were adhered to Table 4-QC Evaluation January Sampling Event Constituent Duplicate Evaluation MW-32 Dup MW-65 RPD Cadmium 2.64 2.79 -5.52 Iron 9130 8660 5.28 Manganese 4850 4870 -0.41 Nickel 58 62 -6.66 GrossAlpha 5.2-l.0 5.2-l.0 ii March Sampling The results of duplicate QC checks for the March sampling indicated that the duplicated samples were within the Relative Percent Difference goal of 20%see Table The information from the Laboratory QA/QC Summary Report indicates that RPD and recovery data at the Laboratory were within acceptable limits as well There were no qualifications attached to these data by the laboratory All samples were received within acceptable temperature specification and holding time requirements were adhered to The DI Blank showed trace concentrations of Chloroform Table 5-QC Evaluation March Sampling Event Constituent Duplicate Evaluation MW-32 Dup MW-65 RPD Cadmium 3.0 3.0 0.0 Iron 8450 8470 -0.24 Manganese 5410 5310 1.87 Nickel 64 61 4.8 Gross Alpha 5.0 1-0.7 5.4 1-0.7 iii February Quarterly/Accelerated Sampling The results of duplicate QC checks for the quarterly sampling indicated that one of the Relative Percent Difference RPD values minimally exceeded the 20%RPD standard i.e Iron MW-il vs MW-70 RPD 22.58 The duplicate RPD values continue as marked improvement over previous periods during 2008 i.e 1st Quarter data indicated 11 instances where the RPD value exceeded 20%In addition all sample sets sent to Energy Labs and AWAL were received within the current limit for acceptance and holding times were adhered to 25 Table 6-QC Evaluation 1st Quarter 2009 Sampling Event Constituent MW-32 MW-65 %RPD MW-il MW-70 %RPD Carbonate ND ND 0.0 0.0 Bicarbonate 419 413 1.44 356 357 -0.28 Calcium 527 545 -3.36 44.4 40.9 8.21 Chloride 29 28 3.51 29 30 -3.39 Fluoride 0.2 0.2 0.0 0.6 0.6 0.0 Magnesium 232 240 -3.44 12.4 11.7 5.81 Nitrogen-Ammonia 0.63 0.61 1.61 0.67 0.58 14.4 Nitrogen-Nitrate ND ND 0.0 ND ND 0.0 Potassium 14.3 14.1 1.41 6.33 6.00 5.35 Sodium 234 231 1.29 581 576 0.86 Sulfate 2340 2290 2.16 977 1040 6.25 LabpH 6.72 6.73 -0.15 7.92 7.95 -0.38 TDS 3510 3660 -4.14 1910 1910 0.0 Arsenic ND ND 0.0 ND NI 0.0 Beryllium ND ND 0.0 ND ND 0.0 Cadmium 2.98 2.99 -0.33 ND ND 0.0 Chromium ND ND 0.0 ND ND 0.0 Cobalt 49 49 0.0 ND ND 0.0 Copper ND ND 0.0 ND ND 0.0 Iron 9180 9350 -1.83 138 110 22.58 Lead ND ND 0.0 ND ND 0.0 Manganese 5170 5100 1.36 73 69 5.63 Mercury ND ND 0.0 ND ND 0.0 Molybdenum Il 10 9.52 ND ND 0.0 Nickel 63 64 1.57 ND ND 0.0 Selenium ND ND 0.0 ND ND 0.0 Silver ND ND 0.0 ND ND 0.0 Thallium ND ND 0.0 ND ND 0.0 Tin ND ND 0.0 ND ND 0.0 Uranium 2.53 2.59 -2.34 ND ND 0.0 Vanadium ND ND 0.0 ND ND 0.0 Zinc 163 167 -242 ND ND 0.0 Gross Alpha 5.5 1-0.7 4.0 1-0.6 0.6 1-0.4 1.3 1-0.5 Acetone ND ND 0.0 ND ND 0.0 Benzene ND ND 0.0 ND ND 0.0 Carbon tetrachloride ND ND 0.0 ND ND 0.0 Chloroform ND ND 0.0 ND ND 0.0 Chloromethane ND ND 0.0 ND ND 0.0 MEK ND ND 0.0 ND ND 0.0 Methylene Chloride ND ND 0.0 ND ND 0.0 Naphthalene ND ND 0.0 ND ND 0.0 Tetrahydrofuran 0.0 0.0 Toluene ND ND 0.0 ND ND 0.0 Xylenes ND ND 0.0 ND ND 0.0 RPD Equation for Gross Alpha Satisfied if differential analysis of reported values and counting error is RPD not calculable due to one value reported at less than the detection limit Review ofAnalytical Laboratoiy QA/QC Analysis The QA Manager reviewed the Analytical Laboratorys QA/QC Summary Reports and made the following conclusions 26 Check samples were analyzed for all methods used in analyzing the groundwater samples These methods were Table Analytical Methods Utilized Parameter Method Carbonate as C03 Bicarbonate as HCO3 A2320 Calcium magnesium potassium sodium iron E200.7 Chloride A4500-Cl Fluoride A4500-F Nitrogen Ammonia as A4500-NIH3 Nitrogen Nitrate Nitrite as E353.2 Sulfate A4500-504 TDS A2540C Metals other than iron E200.8 Gross Alpha E900 VOCs 5W8260B ii The check samples included at least the following method blank laboratory control spike matrix spike and matrix spike duplicate or the equivalent where applicable In this context it should be noted that Laboratory fortified blanks are equivalent to laboratory control spikes laboratory reagent blanks are equivalent to method blanks post digestion spikes are equivalent to matrix spikes and post digestion spike duplicates are equivalent to matrix spike duplicates and For method E900 used to determine gross alpha sample duplicate was used instead of matrix spike duplicate iii All qualifiers and the corresponding explanations reported in the QA/QC Summary Reports for any of the check samples for any of the analytical methods were reviewed by the QA Manager With regard to laboratory qualifiers there were some instances where reporting limit RL was increased due to matrix interference however in these cases the reported value was well above the re-established RL vi The information from the Laboratory QA/QC Summary Reports indicate that RPD at the Laboratory were primarliy within acceptable limits However there were instances where spike recovery and RPD data fell slightly outside of the stated limits vii The DI Blank showed trace concentrations of Chloroform and Methylene Chloride 27 Corrective Actions De-ionized Water Trace Contaminants During the Quarter report period it was noted that field blank de-ionized water continued to yield trace volatile organic presence i.e Chloroform This matter was further investigated by the QA manager and corrective measures included confirmation that purchased de-ionized water had in fact been used for the field blank and two sets of purchased de-ionized waters samples were prepared and duplicate sets were sent to each of two contract laboratories Energy Lab and AWAL Both Labs continued to report the presence of low concentration Chloroform in all of the purchased water samples e.g approximately 30 ppb Concurrently these low concentrations of Chloroform were found in the Quarter 2009 field blanks as well During the QA review for the preparation of the 4th Quarter Report it was discovered that in fact what was purchased is the resin used to treat the water and not the water itself Accordingly samples of pretreated water treated water and the field blanks themselves were planned for analysis in order to further isolate the cause of this low level contaminant source Field blanks were collected during the Vt Quarter and the matter was discussed at length with onsite laboratory personnel however the samplings for pre and post treatment DI water were not collected until the Quarter Accordingly the results of that testing will be evaluated within the Quarter Report Contemporaneous Water Level Measurements Water level measurements were not taken contemporaneously within 5-day period according to the QAP root cause analysis of this matter was reported to the Executive Secretary on May 22 2009 In accordance with that evaluation the following corrective actions were reported Denver corporate environmental personnel have been reminded to make sure that Mill staff are aware of and provide their input into any changes in the QAP that involve changes to field practices carried out by Mill personnel ii Mill personnel have been reminded to review carefully draft changes to the QAP that are provided to them by Denver corporate environmental personnel to make sure they are in agreement that any such changes are practicable from an implementation perspective and make sure that any such changes are implemented in the field and iiiStarting with the Quarter of 2009 Mill personnel will conduct separate campaign to take water measurements from all required wells and piezometers independently of sampling to ensure that all such water level measurements are obtained within the required five-day period 28 2.7 Electronic Data Files and Format DUSA has provided to the Executive Secretary an electronic copy of all laboratory results for groundwater quality monitoring conducted during the Quarter in Comma Separated Values CSV copy of the transmittal e-mail is included under Tab 3.0 SIGNATURE AND CERTIFICATION This document was prepared by Denison Mines USA Corp on May 29 2009 DENISON By Vice President Regulatory Affairs and Counsel 29 Certification certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with system designed to assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information the information submitted is to the best of my knowledge and belief true accurate and complete am aware that there areies for submitting false information including the possibilityof fine and knowing violations Vice Regulatory Affairs and Counsel Denison Mines USA Corp 30 BOUNDARY Mw-li CELL NO 4A MW-14 SCALE IN EXPLANATION T38S perched monªloring well tempwary perched monitoæng we wildlife pond perched piezometer perched monitcang well s$aIed April 2005 tefilporwy perched rnon4torrng wel installed ApiI2005 RYDRO GEO diEM INC SITE PLAN AND PERCHED WELL LOCATIONS WHITE MESA SITE II UW-12 W4-9 01W4-3 OTW4-1 OTW44oiw4i4 MW-l T37S temporary perched monitoring well installed May2007 locations H171 8000/mayO9/welloc.srf MID Groundwater Discharge Permit Date 2.25.07 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 40 of 41 MTAC1HIMENT 11 WIHIIITE MESA ThJRAMUM MULL FflD DATA WORKSIRIIEET FOR GROUND WAThR Description of Sampling Event iw.r%ee rounA Locr Sampler Location well name MW Name and initials jnner lcLltiJny1 it Date and Time for Purging It-2Oo and Sampling if different__________________ Welt Purging Equip Useck Ipunip or Well Pump if other than Bennet ED Sampling Event Ifl Q.%u 6-rsk AL Prey Welt Sampled in Sampling Event Al /1 pI-lBuffbr7.O 7.0 pIBuffer4.O 4.0 Specific Conductance 4S7 uMHOS/cm Well Depth Depth to Water Before Putging SC Casing Volume Well .653h Well tiC7 .367k CondutanceÆv 17gB pffdfWÆterivg. Welt Water Temp avg t3X Rº4oxPtŁntial Eb Turbidity .13 Weather Cond rJk ctoij Extl Amb Temp.prior to sampling event Time 054a GaiPtiged t3 Thna OVU Gal Purged /3.. Conductance l-7%Conductance c1 p1 73 731 Temperature 95 Temperature 13 .4Q Redox Potentiat Eli Ll Redox Potential Eh 5C Turbidity Turbidity SC Time ODO Gal Purged t3 Time Og.SC Gal Purged 33 Condnctance 71St Conductance 1179 pL 7.Y pH Temperature______________ØrnpŁrature 13% RedoxPoteutial Eli Redox Potential Eli S.O l.5 12g .. ivilll Groundwater Discharge Permit Date 11.17.06 Revisiort Groundwater Monitoring Quality Assurance Plan QAP Page 41 of 41 Turbidity Volume of Water Turbidity fSsisL 3T PnulP Rate Calculation Flow Rate in gpm 5160 .33 Time to evacuate two casing volumes 2V T2V/Q 4n Number of casing volumes evacuated if other than two._ if well evacuated to dryness number of gallons evacuated. Name of Certified Analytical Laboratory if Other Than Energy Labs Awcr CAn ki 5c4-0V uOc.3 ype of Samule Sample Taken elSe Simple Volume indicate if other ThS as specified below Filtered circle Preservative Added circle VOCs Nutrients yyMetab bE 3x4Oinl lOOml 2SOiiil Yl -.Ha tI H2S04 ff4 lIMO3 All Other Non- Radiologics 250 ml -- No Preservative Added GrossAlpha Other specify J5 L000ml Sample volume H3S04 If preservative is used Specify Type and Quantity of Preservative Comments ArvAjeL on -c o\OU Cnner-RitcL.1 rcsc eUcs4 Pcut bcrsa4oZ%O PuneLJ \J enAti a-IpO4 Scrnlf3L 4accn JDoC.1oj vu 4r 4r i14 I-e4f ssI Doc \cac 1\LJ tckbtr cL-k Mill Grnundwatcr Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Temperature t4 Cl Redox Potential Eb_____ Date 2.25.07 IIevisioa Page 40 of 41 Temperature 14 Redox Potential EhL40 i_I ________rO ATRACHMENT 11 WII MESA UIRANMJM bELL IFIIIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event 1cr i.cr3ccf rutnA CrAcr Sampler Location well name AAv Name ad initialritnfr 1lL Date and Time for Purging 1i 2Q04 and Sampling if different Well Pinging Equip tJse pwtap or Well Pump if other than Bennet Sampling Event 1a 4a Prey Well Sampled in Sampling Event Piw 3h pHBuffer7.O iC pHBuffer4.0 4-3 Specific Conductance 147 uMflOSIcm Well DepthS Depth to Water Before Purging 1K Casing Volume Well .65Th Well ctn .367k Conductance avg 98-C pH of Water avg Well WaterTemp avg P1 Turbidity .18 Weather Cond u4i U0Jj Extl Athb Tmp.prlorto sampling event Time itOSl...Oal.Purged LS Tifp3IflO GLPUrged Conductance Conductance pH l.-7 pa Temperatur YS-S Temperature titUs RedoxPoteutialEh 3L1C1 RedoxPotenthlEh_____________ Turbidity_______________Turbidity 05 Time ilic GaLPurged 9.4 TimetnO GaLPurged 3-C Conductance__________________Conductance 51 oH_____________________ pH_______________________ coundwaterDiscluwgePertnit Date 11.17.06 Revisloit Groundwater Monitoring Quality Assurance Plan QAP Turbidity Thrbidity Volume of Water Purged jjggRnte Calculation Page 41 of 41 PlowRateQ ngpn 5/60 _____ Time to evacuate two casing volumes 2V TZV/Q sO Mt Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuated.. Name of Certified Analytical Laboratory if Other Than Btiergy LabsAntr azn \LP L-b sd-0c UOCs Jyne of Sample Sample Taken circle SathUle Vohune bulicati if other thSlaAspedfled heliw Filtered circle Preservative Added circle VOCs ct 3x40m1 UCL Nutrients 100 ml iN ILO4 HØavyMetals ZiOlill NO3 Air Other Non. Radiologics 250 ml jI .. No Preservative Added Gross Alpha Other specify thU 1000 ml Sample volume bV 112504 Is If preservative is used Specify Type and Quantity of Preservative ptZ tvn-U0It1L- \J .tt Pta rs k.mni kIn 2LL LCLI r4v34 ftssr 1L \s3rrVCleetr4rctt tL oy4Lo-5n Comments _________ Groundwater Discharge Permit Date 2.25.07 Revision iroundwater Monitoring Quahry Assurance Plan QAP Page 40 of 41 AflACHMEN II W11 IMIISA UIITAN1I1EJM I4II1LL PIUELD DATA WOM1SHlEET FOR GROUND WAflR Description of Sampling Event Ot.oAcr rousJ-L4Lr Sampler Location well name lIt ix 34 Name and initIals tvutcr 14 Date and Time for Purging -1 -O and Sampling if different_______________ Well Purging Equip Use pnfflp or_bailer Well Pump if other than Bennet Efl Sampling Eventit Q5.L cit Prey Well Sampled in Sampling Event Pr pHBuffer7.O 7.0 pHBuffer4.O 4.0 Specific Conductance Vt1 uMHOSIcm Well Depth 93 Depth to Water Before Purging 15 cZ Casing Volume Well .g .653k Well .367k conductance avg of Water avg 71 Well Water Temp avg J3 7D i4iith1h4at Turbidity Weather Cond ovb Extl Amb Temp.prior to sampling event LY rimjpd.i Gahikirged Tliue Uja QaLPurged 35 conductance CQH3 Conductance 71 pff_________________ Temperature 1311 Pdnv PntantnI k\ Temperature Redox PotentialEh Turbidity Time Ibo Gal Purged Conductance 1.7 a..flaL/ Turbidity MO _______ ________Time 1bS Gal Purged 8.S _________________Conductance cc pH__..7I I.6 Temperature flcr ..t tnjIerature Redox Potential Eli 11 Redox Potential Qg aXJ jfl.GroundwatDiSthargcPeWit Date jt.I7O6 itevisirnr Groundwater Monitoring Qufly Msurance Plan QAP Turbidity Thrhiditv Volume of Water Purged Pumping Rate Calculation 10 t4 Page of 41 Flow Rate in gpm 5/60 _____ Time to evacuate two casing volumes 2V T2V/Q Mn Numberof casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Labs es \J4-LJs Type of Sample pipie Taken circle SiSjile.Vohnne indicate if other thit l specified balMy Filtered fdrcle Preservative Added circle VOCs Nutrients HØavyMetals All Other Non- Radiologics GrossAipha Other specify 1VN 34rnil IGOmI z5othf 250ml 1000znl Sample volume Y-R In H2$04 It 111403 NoPesorvatlve Added 172504 yntcs4 Ifapreservativeis used Specify Type and Quantity of Preservative Comments Are uJ ott thC ootzL tlncr aa Satniptta titflf Pvt\rlDJaaarnateoLtl 4jei oqo i3AJitr 9.3-L .441 ir3aktr kCM- 1ILpeJyaLIŁ4L 1r 8roU.a .4 IVfili Groundwater Discharge Permit Groundwater Monitoring Quathy Assurance Plan QAP LLdUptSIfl4W Redox Potential Eli 2.55 u-rb Date 2.25.07 Revision Page4Oof4l ATTACIBIIMLENT fff1IJflE MESA URAMUM MILL IBEEIUI DATA WOflSHEET mit GROUND WATEJ Description of Sampling Event flLgA-ie.r ro4 \j.rAtr Sampler Location well name Mj .S Name atid initialsTlmex 1-1 .it iT ft Dale and Time forPurging -U-2ong and Sampling if different_______________ Well Purging Equip Uset .pmap or_bailer Well Pump if other than Bennet ED sampling Event Qu.c.J4cc4 G.-L PreY Well Sampled in Sampling Event M-114 pllJ3uffer7.O 7-0 pHBuffer4.O LLO Specific Conductance 141 uMHOS/cm Well Depth Depth to Water Before PucgingjflC $9 Casing Volume 40 Well .653h Well .367k Condu6tance avg M30 pH of Water avg Si Well Water Temp avg Redox Potential Eh%93 Turbidity .40 Weather Cond._________________Extl Ant Temp.prior to sampling event mite 1OA tkruri 6-6 10 Ii4S qaLurged IS.2.- conductance -89 Conductance 23t p0 75J p0 7.SL Temperature 143%Temperature 1Q30% Redox Potential Eli______________Redox Potential Eli aLI Turbidity Turbidity_____________________ Time IS Gal Purged -4 Time 11 SS Gal.Purged 3L3 Conductance 33 Conductance_________________ pg_7-57 pH 7S7 P.nnaratura Temperature Redox Potential L\ 3\ Eli -5 cri _________ IWilI-.GroundwaterDiscbarge Permit Date 11.17.05 Revision Groundwater Mbnitoring Quality AssurancePlan QAP Page 41 of 41 Turbidity________________Turbidity__________________ Volume of Water Purged YFdraugj.gxg.Msufed_________________ jgng Rate Calculation flow Rate 03 in gpm Time to evacuate two casing volumes 2V smo T2V/Qtz Number of casing volumes evacuated if Other than two If well evacuated to dryness number of gallons evacuated___________________________ Name of Certified Analytical Laboratory if Other Than Energy Labs r.n .5 L4s sek cW oc Th of SainSe mple Taken circle- Sihude Volume Indicate if other tbaii as specified beluwi Filtered circle Preservative Added circle VOCs 3ic4OS Ha Nutrients 100 nil H2S04 UØavyMetals .JtN 25th it N.HWO3. AU Other Non- Radiologics 250 nil NoPresrvativAdded GrossAlpha 1000mI HS04 p4 Other specify iwvr4 InarOpaniC Sampt volume IJ If preservative is used Specify Type and Quantity of Preservative Comments Aniuet\oisic______-Ioii.aA cScc Ici/QL4 0flr3 4ta4FI.lAj cOC\4 Ptry 7CctA 1o PAI3Ct cACt Lr ervY4J-Ips 4tct aot LS4 41 21 iOejitL -C4fl7%j cA i1-hotr sc CAcc tkrott TIC MIII Groundwater Discharge Permit Date 2.25.07 Revision Groundwater Monitoring Qualfty Assurance Plan QAP Page 40 of 41 AThACH6IIENT WfIIIITIE IMIISA UMANIJUIW MILL llIUELI DATA WO1RESEET FOR GLQOUNITh WATER Description of Sampling Event Oadcc4.rounA WLr Sampler Location well name MW WarnS arid Initials Amner Date and Time forPurging --XXk and Sampling if different Well Purging Equip Useth Xpurnp or _bailer Well Pump if other than npet El Sampling Event Ciiv.arL ..rk\i3 tkr Prey Well Sampled in Sampling Event Mv pafluffer7 7.0 pllBuffer4.0 i4 Specific Conductance t%1 uMNOS/em Well Depth Depth to Water Before Purging IC Casing Volume Well 25 .L7 .653k Well 367k conductance avg -QM9 of Water avg 04 Well WaterTemp avg 14.3S R$thotioxz Turbidity .243 Weather Cond Pcw1 fI4tJ Extl Amb Temp.prior to sampling eventLitc Time Gal Purged Time U4 Gal Purged CondÆctanCe J7 014 Conductance oi __________________ Temperature j4 ..S Temperature 43c Redox Potential Bk Redox Potential Bk 22a Turbidity Turbidity TimeilJb aLPurged fCt.5 Time 2iO Gal.Purged iC3 Conductance_______________Conductance .7LS Temperature jq.i rnemwe iMiS Redox Potential Bk_____________Redox Potential Bk .2T tkrL J5 ... Tuidily If well evacuated to dryness number of gallons evacuatet Time to evacuate two casing volumes 2V TZV/Q ISS Akn Name of Certified Analytical Laboratory if Other Than Energy Labs An-a-Esr \$tS \h type of Sample Sample Taken circle Sisile Volume indicate if other thsis specified belnwi Filtered elSIe Preservative Added circle VOCs 3x4Onil YN ..-Ha tJN Nutrients HØavyMetals Aft Other Non- Badiologics GrossAlpha Other specify 31 lOOm 251St 250 nil 1000 ml Sampl volume Nj 49 L1$O4 V5 11N03 1\IoPkeservative Added H2SO4 rattr$JMrntCX If preservative is used Specify Type and Quantity of Preservative MIII Groundwater Discharge Permit Groundwater Monitoring Qualitsj Assurance Plan QAP Date 11.17.06 Revisiorn Page 41 of 41 Volume of WsPurged SPFS pping Rate Calculation PlowRzteQ ingpm 5/60 _____ McnsuS c4L Numberof casing volumes evacuated if other than two Mill Groundwater Discharge PariS Date 2.25.07 Revision Groundwater Monitoring Quality Msurance Plan QAP Page 40 of 41 AflACJHIIZENT 11 WIHIJIfl MESA URANffIIJM MLL ThTh DATA WORKSJHIIZET IFOR GROUND WAThR Description of Sampling Event rcu.nd\t34 et Sampler Location well name MW Name and initialsTcvrier ii TN- Date and Time for Purging .1 .4 2ot and Sampling if different________________ Welt Putging Equip Used 4jpufflp or_bailer Well Pump if other than Bennet I1- sampling Event flL-nr.4 3gk Prey Well Sampled in Sampling Event MW pRBufferl.0 7.0 pHBuffer4.0 Specific Conductance I17 uMEXOS/em Well Depth j33 .g Depth to Water Before Pigging IC 72 Casing Volume Welt ft.t .653h Well .36Th Conductance avg 311S pH of Water avg 16 Well Water Temp avg 14.47 R4thPoiSa 7ThkWthty Ct Weather Cond Extl Ainb Temp4prior to sampling event 1YC Thue 23\CaiPurged t.41 Thpte %.4b Q4urged 4a5 CondOctance RXSS Conductance 4331 pH c.cia p11 Temperature L14S Temperature .L1 Redox rotund Eli Redox Potential Eli Turbidity________________ Turbidity__________________ Time 13X Gal Purged 16 .5 Time 1340 Gal Purged 2415 Conductance 41l Conductance H1 pH________________pH_LscL Temperature 14 .q Temperature j4 -SL Redox Potential 30R Redox Potential 34 lCd fr\ Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 1117.06 Revisiorn Turbidity Page4I of4l Volume of Water Purged Puinoina Rate Calculation Plow Rate ingpm 5/60 _____ Time to evacuate two casing volumes 2s T2V/Q Mc Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuaterL blame of Certified Analytical Laboratory if Other Than Energy Labs J.\mrt \i4 Lk yuie of Sample Sample Taken cia Smwle Vohune hidlcÆteif other half as specified Elltered circle Preservative Added circle VOCs 3x401n1 .-RCL Nutrients OS lOOm 112S04 Metds All Other Non- Radiologics 250th.. 250ud flN03 NoPreservativeAdded GrossAipha Other specify 1000ml Sample volume 1SJ 31 H2804 %j ifapemtivebus Specify Type and Quantity of Preservative Comments 4rrie pr Cutrwr 0i\.LJ rser -C fJAk cn.nn\nd Prtrti.-hn-ttAn I1 cni LrB Ls4t Al 4pO cr Lkir-rot.gbA u-chr ci snwpics 4tccn vccc Cktoi- AflACIHIIMIIENTR WIHIJITJE MESA KJIIt4iJ1IUM MRIIJL IT1ELffD DATA WORffcSEET FOR GROU1kIIa WARER Desciipt ion of Sampling Event ao4cr 6rousk WcLr $co.rCj Me41 Sampler Location well name Mtx\14 Name and initials tv..ncr Date and Time for Purging .OO and Sampling if different_______________ Well Purging Equip Useit Xjtutip or_bailer Well Pump if other than Bennet El Sampling Event CsL .ryp1t3Sr Prey Well Sampled in Sampling Event pIBuffer7.O 1.0 pHBuffer4l 4.0 Specific Conductance MI uMflOSIcm Well Depth 12 Depth toWaterBeforePurgigJCQ Casing Volume IT Well iL.1 .653k Well .367k 40i5 pH4erªvg .7S Well Water Temp avg RŁ4 PtontW El 3.L Turbidity Weather Cowl.________________Extl Atnb Temp.prior to sampling event Time OSIS hI Purged 95 Ttflie Oc3O Gal Purget Conductance 40 Conductance 40ic pH__________________Jpfl ipet NflC Temperature J4 Yo Pss PntentiattThi 3S _________________ Turbidity Time Ytoc Gal.Purged icS.% Conductance 4Ong nil__________________________________ Temperature IQOS Redox Potential Eli SY 1tr o4 Mill GrnundwaterDischafge Ptertht Groundwater Monitoring Quality Msurance Plan QAP Date 2.25.07 Revision Page4Oof4I tunis .______________Redox Potential Eh SSI _____________Turbidity .% Time O4 Gal Purged 2SOS Conductance 40X Tnlerature Redox Potential Eli 308 Mill Groundwater Discharge Permit Date 11.17.06 ReWsion Groundwater Monitoring Quality Assurance Plan QAP Page4l of 41 Volume of Water Purged .Th gj jpg Rate Calculation Flow Rate in gpm S/60 ____ Time to evacuate two casing volumes 2VT2WQtgMfl Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuatct Name of Certified Analytical Laboratory if Other Than Energy Labs rrttr C4 Tvse of Sasunk Sinple Takep circle- Saæuifr Volume IndirateifothØr tlffik aS specified beimy Filtered ci4c Preservative Added circle VOCS cV 3x40nl IICL Nutrients Heavy Metals All Other Non- Radiologics GrossAtpha Other specify 100w 250th 250 nil 1000w Sampl volume I12S04 1N03 No Preservative Added HZSOIL tN restt4 rcanc.s If preservative is used Specify Type and Quantity of Preservative Mill Orouwater Discharge Permit Qrnundwater Monitoring Quality Assurance Plan QAP Time 1cO Gal Purged 2CM Conductance________________ pL Temperature /Z7 Redox Potential Bk .r1 Date 2.25.07 Revision Page 40 of 41 M1TACHMENT ii WIIIIfl IMIIESA URAMUM IMUELL FIIIELIID DATA WO1KSHIEET ThOR GROUBID WATER Description of Sampling Event ur\-c.rL 0tk ItC\L fT C.r4 Sampler Location well name Mi4 tS Name and initialsiC Fp ILL Fl Date and Time for Purging 2A-and Sampling if different Well Putging Equip lJse puffip or .jÆilerWell Pump if other than Bennet El Sampling Eventj Ue..-coa w.L Prey Well Sampled in Sampling Event MJ pHBufferl.O 7.0 pllBuffer4.0 11.0 Specific Conductance 1t uAffiOS/cm Well Depth fl7 Depth to Water Before Pugin ID L3O Casing Volume 174 Well O.v-$.65Th Well 367k Condtttalnce avg 4LCP pH of Water avg Well Water Temp avg I3S Si1otntiail3kC Turbidity tf Weather CondL at4lj C04 LX Extl Anib Tomp4rior to sampling event 3c Time 4iC ClalPurged 0C Time I500 GalPurged JCS Conductance qg Conductnce 4Lg pIE 9A5 pH -JtC Temperature 41 Temperature H.n Redox Potential Bk_____________Redox Potential Rh Turbidity ol Turbidity 005 tji Time 14OO Gal.Purged 3.3 Conductance Litlot 49 ____Temperature j3 Redox Potential EM Mill Groundwater Discharge Permit Groundwater Monitoring Quality Msurance Plan QAP Turbidity Date IL1716 Revision Thrhiditv Page 41 of 41 Volume of Water Purged Purnping Rate Calculation 3tL Flow Rate in gpm SI6O _____33 Time to evacuate two casing volumes 2V TZV/Q 2A Number of casing volumes evacuated if other than two_ If well evacuated to drjniess number of gallons evacuate$_ Name of Certified Analytical Laboratory if OtherThan Energy Labt_ Type of Sample Sample Taken circle SniOle Volume Indicate if ther 1ISI11 specifiedlsI Filtered circle Preservative Added circle VOCs Nutrients 3x4Oæil lOOmI tP HCL HZSO4 HØavyMetals 2501b1 .HP403 cjN All Other Non- Radiologics irossAlpba Other specify 11 1j 250m1 L000rnl Sampl volume hi NPrervative Added H2S04 If preservative is used Specify Type and Quantity of Preservative 4p\Cntr 14tl.A41 rccii tr jL\icAc oAk .J_Ufl D..A j2i i2n \3c\tr -i cL clccr ttiro tc1t o.-f ff uOt4-cr tivh ck pPk S_od Comments Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 Revision Page4Oof4I MLTACIIMENT W1HEIIT1 E4IIESA URANIUM MuLL F1IILD DATA WORKSIBIIEIZT FOR GROUJ%ID WAflR Description of Sampling Event 151 u.c4cr Lt0k Ucrc.c $ampler Locationwellnanie JAtpJ Narnºaædinitials \JAncf 1LiLL 77k Redox Potential El____________ ci Redox Potential Ehu S.5 Turbidity L4 Time n14S GaL Purged Conductance Lj1 3g3 pH Temperature Redox Potential Eli Date and Time for Purging ioo and Sampling if different Well Purging Equip Useck puthp or Well Pump if other than Beunet 1E Sampling Event CL cM4-x-4hr Prev..Well Sampled in Sampling Event MW pHBuffer7.O 1.0 pHBuffer4.O 4.0 Specific Conductance gc-uMHOSIcm Well Depth na Depth to Water Before Puging7i OS Casing Volume 41t Well 22 .9..653h Well .367k Conductance atg ll7O4 pH of Water avg 10 Well Water Temp avg 15.75 Rc4PÆtŁiiitaUhf1S Turbidity Weather Cond. U1 coIX Extl Amb Tenip.prior tO sampling event Tune 2Op Gal Purget .S riffle JS Gal Purged Conductance 47M Conductance L4789 pH 1.O1 pH.1 Temperature Temperature \.3 %3 Redox Potential Bk____________ Turbidity 36 Time \.Q Gal.Purged .4t Conductance 1.o5 Tepjenflim lir MIII Grenadwater Discharge Permit Groundwater Moakoring Qualiy Assurance Plan QAP Date 11.17.06 Revision Page 41 of 41 0co0 Pveu\ wiwing Rate Calculation flow Rate 03 in gpm S/60 _____.33 Time to evacuate two casing volumes 2V T2V/Q Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuated. Name of Certified Analytical Laboratory if Other ma Energy Labs_ Type of Sample Sample Taken ciSc $aæiyle Volume Indicate If other ftjiiitaS specified lielow ltered circle Pregenrafivo Added circle VOCs Nutrients Si 3x40m1 lOOm Ha 112504 HØavyMetals YJ 250th cJN HJO VJN All Other Non-250 ml cFj No Preservative Added Rndiologics irossAipha 1000w uzso4 Other specify Sainpl volume ci c9 Ifapreservative is used Specify Type and Quantity of Preservative Comments CI.e 1A I10il1A C-b- tAr4r%.h Lrra Puc Lrr.t r.4 flS t.atK LTh 9e.gre nsi dcer brocjkoa-ps.or .rtttr k.JO csl L4k rjcytt Mill Groundwater Discharge Permit Groundwater Monitoring Quality Mserance Plan QAP Date 2.25.07 lRevision Page 40 of 41 Time H40 GaLPurged LC.4 Conductance SD0 pR Temperature Redox Potential Eli 11.5 f31\ AflACIHIMfiENT 11 WIHIIITIE IMPESA ANIIUM MEL FWJTh DATA WOEKSJHIIEET FOR GROUND WATIER Description of Sampling Event jcr 4.s4t-rA biccr Sampler Location well name MbJ IS Name and initiasIjnner U0i Ja 4t ft Date and Time for Purging -1 1.OOCL and Sampling if different________________ Well Purging Equip Used 2jiiurnp or.......bailer Well Pump if other than Benliet SanipIingEventIs.kr kJ4 Prey Welt Sampledin Sampling Event MJJ pllBufferl.0 7.0 pflBuffer4.0 41 Specific Conductance gq7 uMHOSIcm Well Depth Depth to Water Before Purging it Casing Volume Welt 40.72 .653k Well .361k Conductance aVg Z4C pH of Water avg 01 Welt Water Temp avg .S RbxPtential Efi t7 Turbidity Wather ond Cto.A Extl Amb Temp.prlor to æmpling event Timef040.dal.Purged .4 TIIUeLiIIOS.OLPurged tiUc condUciauce 39 S3 Conductnce 3447 Temperature fl .51 Temperature NS15 Redox Potential Bk Redox Potential Eh Turbidity 13 Turbidity 13 Time g-i Gal.Purged Conductance________________________ PH ____Tnpbrature Redox Poteutiat Eli cit-V Ji ffl_GrounrIwaterDischargePerrait Date IU706 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 41 of 41 Turbidity Volume of Water Purged jgpg Rate Calculation Flow Rate in gpm Time to evacuate two casing volumes 2V 5/60 .33 T2V/Q Number of casing volumes evacuated if other than two_____________________ If well evacuated to dryness number Of gallons evacuated____________________ Name of Certified Analytical Laboratory if Other Than Energy Labs_________ Tvne of Sample Sample Taken clrc1el Slihule Volume lEdkateif other th1 aS specified bŁthvt Filtered cfrcle Preservative Added circle VOCs Nutrients HeavyMetals All Other Non- Sx4Onil 100 ml 250th. 250 ml .. tb 1\ YN\ II$O4 11103 NoPresrvativeAdded Radiotogics GrossAlytha ioooa H1SO4 Other specify @3 Samplvolume 91 If Ifapreservativeisused Specify Type and Quantity of Pteservative Comments ArvAejL On Los lanncr-Io IltcL prcsc cfl4 u.rLc bcAcrsa ta.i.Il e.nAJ cJ-sausipL 3axc4 1- i1I-t .1 44-pcitmkcA4c.k AnEcO 5renk..-.o .r 4r L4f Date 2.25.07 Revision Page4Oof4l _______p1 tat tmrieratut Ys7 -_______________RedoxPotenthlEb_________________ Mill Groundwater Discharge Permit Groundwater Monitoring Quality Msurance Plan QAP ATIPACMIt4UgNT WTNIIITE IMIIFSA URANIUM IMIIELL FKD DATA WORKSEIIEIET FOR GROUM3 WATER Description ofSampling Event IS Qu.cai4cr rainvk bJo3tr Sampler Location well name MW Name and initiatflnner IJ4LI 71 Date and Time fur Purging a-it-0O and Sampling if different_________________ Well Purging Equip Useth lpuinp or_bailer Well Pump if other than Bennet Ci ED Sampling Event aAQ..r rL\ocr Prey Well Sampled in Sampling Event Mb tic pIBuffer7.O to pflBuffer4.O 4.0 Specific Conductance 4tl uMEOS/em WeltDepth Depth to Water Before Purging SO .1 Casing Volume CV Well R.OS .653h Well .367h Conductance avg pH of Water avg Well WaterTemp avg \S7 Ri4Piat $C Turbidity Weather Cond C4csA Extl Amb Temp.prior to Aampliug evØtit Time Th.4S Gal Purged Tune f31S Gal Purged Conduciance jgL95 Conductance 4Th pH 7.IS Temperature 13.7L Temperature 3-74 Redox Potential Rh 2X Redox Potential Rh 2-73 Turbidity 64 Turbidity Time tS4S GaL Purged 24 .ic Conductance______________________ pH Temnerature Time P42O Gnt.Purged %-3 Conductance iS Redox Potential Eli iO1 Mill Groundwater Discharge Permit Date 11.17.06 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 41 of 41 Volume of Water Purged 1ppjgg_Rate Calculation rurbijr Flow Rate in gpln 5160 .33 Time to evacuate two casing volumes 21/ T2VIQ 35sj Number of casing volumes evacuated if other than two_ If well evacuated todryness number of gallons evacutQd_ Name of Certified Analytical Laboratory if Othei Than Energy Labs_ Type of Sainuje $ie Taken ektleI Saihpile Volume CmdiºatØifthØr thsta specified belØw Filtered elSe Preservative Added circle yOGa t4m1--Ha Nutrients 100 ml 12S04 HØavyMetals All Other Non- Radiolpgics 250if 250m1 Af4 lIMO3 NoPServativeAdded GrossAlpha 1000ml HzSO4 Other specify Sample volume flj Ifapmsativeisused Specify Type and Quantity of Preservative Mill Groundwater Discharge Permit Dat 2.25.07 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 40 of 41 ATfACJBIMIENT if WEITIE lMllSA MitRAL MIIRLD DATA WORKS1EET IFOR GIROUIkID WATIER Description of Sampling Event Cuou4cr 6.rot Us3jrr Sampler Location well name pa Name and initials 14 kvncr Date and Time for Purging 2OO%and Sampling if different Well Purging Equip Uset Xpurnp or .jailer Well Pump if other than Bennet Sampling Event cc.L AI.tLSA 4k-Prey Welt Sampled in Sampling Event MW pFlBnfferl.0 7.0 pffBuffer4.0 Specific Conductance tt1 uMIXOSFem Well Depth Depth to Water Before Purging C%Casing Volume Well .653k Well .367k Conductance atrg 70 pU of Water avg i4 Well WaterTemp avg fl L1 Øddflh40t Turbidity Weather Cond wJ Extl Ainb Temp.prior to sampling event Time caPu .L Tine-Qflnrget ItL conductance 7O Conductance 7p7-1 pH pH.732 Temperature Y3 Temperature ti Redox Potential Eli Redox Potential Eh 4O% Turbidity Turbidity Time IO.5L Gal Purged .q Conductance pH i5c Time IO5 Gal Purged Conductance 7OiL Temperature 13 tiiieratuie Redox Potential Eh Redox Potential Bk roC Mill Gmundwater Discharge Permit Date 1L17AJ6 Revisiow Groundwater MonitoSg Quality Assurance Plan Page 41 of 41 Turbidity Turbidity Volume of Water Purged When FleW Parameters ate Measured Calculation Flow Rate in gptn Time to evacuate two casing volumes 2V _____T2V/Q 2S M-\ Number of casing volunies evacuated if other than two____________________________ If well evacuated to dryness number of gallons evacuated___________________________ Name of Certified Analytical Laboratory if Other Than Energy Labs hwttQ \iJ Sc JQCs lyreof Snualife StunMe Taken ctSe Pile Volume Ondfrafr If other thaih aS specified below Filtered circle Preservative Added circle VOCS VN 3x41 Nutrients loom ffSO4 HiavyMetals All Other Non- Radiologics OmasAipha Other specify fl 2501 250 ml 100Gm Sampl volume END No Preservative Added H2SO tN Qi r4Jnnnanc2s Ifapreservativeisused Specify Type and Quantity of Peservative Comments on Si Lnvcr pjP9e.SarnpUna eutnt Put Scttiflles 4tL4ce ti-11I7 aa%kr 5Cc its i4o1itprcscriLck P1sjA.Lt_Lc Sitc VOa%crt Ocr 4i..ntto n-t Mill Groundwater Discharge Permit Date 2.25.07 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 40 of4l ATTACIHEMENfl WIHIJIfl IWIESA UIEANffUM IIIJLL FIU2LD DATA WO1S11fflEET ThOR GROUND WATER Description of SaniplingEvent tiu.oAcr 6-rot.rtA LLr Sampler Location well name Mt .ZL-.Name and initials kvvice tALtLy Date and Time for Purging and Sampling if different Well Purging Equip Used putflp or_bailer Well Pump if other than Bemiet Ef Sampling Event 1.wL sc Ji Prey Well Sampled in Sampling Event pflBufferlAL 7.0 pLBuffer4.0 Specific Conductance It1 uMROSfcm Well Depth 19 Depth to Water Before Purging C2 Casing Volume Well SO Li .653 Well 367k Conductance avg IC.pH of Water avg Cc Well Water Temp avg J5 .g Rt1PotSilaIi IL Turbidity Weather ond _SsA.nyl Extl Amb Temp.prior to sampling event Tune MP Gal Purged 4k Time olR Gal Purged coiwluctance______________Conductance Jfl pg cqg pfl ...OO Temperature c1 Temperature Redox Potential Eli Li Redox Potential Eh 14 Turbidity Turbidity Time C4qc Gal Purged2.4 Time 1015 Gal.Purged C2 Conductance 7.4 Conductance DKJ L-c Temperature i3t tŁrntS ltki5 Redox Potential Eli 13c1 Redox Potential Eli_______________ Mill Grotwdwater Discharge Permit G-roundwater Monitoring Quality Assurance Plan QAP Date 11.17.06 Revision Page4l of 41 Volume of Water Purged When Field Parameters are Measured EurnS Rate Calculation If well evacuated to drynes number of gallons evacuate.d. Time to evacuate two casing volumes 2V T2V/Q 15 Name ofCertifledAnalyticalLaboratoryifOtherThanEnergyLabs Ajrt VOs LL sd-S oocLs type of Snaple Sample Taken circle Sisple Volume indieateifothŁr ThSaS specified below Filtered circle Preservative Added circle VOCS 3i4Oæil fi -.-lICE Nutrients lOOmI U$O4 Il EØavyMetals Au Other Non- Radiologics JrossAlpha Other specify CI 7k 250thf 2SOinl l000mI Sample volume .. ci 1Th103 NoPreservtiveAddŁd 112S0$ IlCr4 Jptnr6avttL\ If preservative is used Specify Type and Quantity of Peservative rn.rn.anl ArruJ on Sik ann U0 tIiotcuj nrcsekCr 5- 1..tALCI te3akcrL $ttS 4cs 4-OX7 StLnrt\.-nfl ci QA$ drorj rcj4 rhpvc LSc3 Flow Rate 03k in gpm 5/60 ____ Number of casing volumes evacuated if other than two A2ITACELk4IINT WIHEICTIE MESA U7AIIIIJM MffLL FIIEIUIJ DATA WOREIIEIET FOR GROU1 WATEE Description of Sampling Event Owc1rcr 6-rouJ r.34Lr Sampler Location well name lAy .23 Name and initials tU ltipw j4 at itoLy Date and Time fur Purging it OOt and Sampling if different Well purging Equip Uset Juffip or _bailer Well Pump if other than Bennet -fl El Sampling Event cUAk .eojpLL Prey Well Sampled in Sampling Event MW i4 pHBuffer7.O 7.0 pHBuffer4.O Specific Conductance tv1 uMIOS/cm Well Depth Depth to Water Before Purging in sc Casing Volume Well it S3 .653h Well .367k CondUtiuiceat jHEW4tthr4vg 23 Well WaterTemp avg 13.gi ih-341_turbidity l.ta Weather Cond.__________________Extl Amb Temp.prior to sampling event JlLPirged TIIS.S Condcance_______________Conductance 4nt7 Temperature l1k.V Redox PotentialEh_____ Tuibidity Time .gg Gal.Purged l4.c Conductance j7 pzuATh Temperature C4tt Turbidity Ot Mill Groundwater Discinrge perrt Groundwater Monitoring QualiflssurancePlan QAP Date 2.25.07 Revisioa Page4Oof4l Temperatur Dadnv PnantnI fl1 3P4 Time COO 3aLPurged %1 Conductance 3q-7c Redox Potential 13k 35S Tu.cb rirature RedoxPotentialEh 3SI _sbr cJ Mill Ornuadwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Turbidit3c Date 11.17.06 Revision Turbidity Page of 41 Volume of Water Purged WhewFiblauztitrskara$jsiapt irnwn Rate Calculation if well evacuated to dryness number of gallons evacuated. Name of Certified Analytical Laboratory if Other Than Energy Libs ArrweI rs4 LE Tvge of Sanipte Sample TalcØn cirde SÆnuile Volume lndleateifothŁr tth al snecified Filtered circle Preservative Added circle bejot Nutrients cD 3x40ml loOm YTh HCL J12S04 fl HŁavyMtals All Other Radiologics GrossAlpha Other specify Non- aac 250S 250 ml UkOnd Sample volume mio3 jt No Preservative Added H2SO tN renenzj tnr If preservative is used Specify Type and Quantity of Preservative Plow Rate QA in wm 5/60 ____ Number of casing volumes evacuated if other than twoL Time to evacuate two casing volumes 2V T2V/Q 7p /Jy .- Tenipemture .19 Redox pntenliit PM______________ Tutbidity______________ Time 1L3 Gal Purged Conductance gO pH COSLI Temperature CA Redux Potential Eli s73 a- Date 2.25.07 Revision Page4Oof4l Mill Groundwater Discharge Permit Groundwater Monitoring Quathy Assurance Plan QAP AflACil1MIINT ii WWTE MESA ffJIftAMUM I4IIIILL ThIIELD DATA WORKSEIIEET FOR ROUND WATER Description of Sampling Event fl cr rovak Sampler Location well name 24 Name afid iriitialslayv nIl 14 Date and Time for Purging 2-4-ooq and Sampling if different Er Well Purging Equip Uset jpump or_bailer Well Pump if other than Bennet SE Sampling Event Grpwk iUe Prey Well Sampled in Sampling Event M3 pffBuffer7.O 70 pHBuffert0 4.X specific Conductance it7 uMHOSIcm Well Depth 120 Depth to Water Before Purging ft l-\.U Casing Volume Well 3.33 .65Th Well .36Th CondutSnce avg L4 S7M pH of Water avg Well WaterTenip avg Re4bxPotStiai Ehy3C Turbidity ia.ci Weather Coed Extl Amb Temp.prior to sampling event 1lc Time Gal Purged Ur Tithe IL31 Gal Purged 32 Conductance Conductance Lj S7 pH c-.cc pH L.7o Temperature 14 Cl Uk Redox Potential EM SCS\ Turbidity Thne R.3 GaLPurged .2.G1 Conductance uSlO pH 1Q44 Temperature 14 Redox Potential Eli 3SC MfflGrouadwaterfliscbargePerS Date 1117.06 Revisiorn Groundwater Moaltoriag Quality Assurance Plan QAP TurbiditE Tnj4uditv Page4l of4l Volume of Water Purged --1 pjng Rate Calculation Plow Rate in gpm 5/60 317 Time to evacuate two casing volumes 2V T2VIQ J.O pJi Number of casing volumes evacuated if other than two. If well evacuated to dryness number of gallons evacuated_ Name of Certified Analytical Labouttory if Other Than Energy Labs 4tncrcctn VJJ seA IncfSnnude Sample Takea Leircle Saisiule Volume Indicate ltitbØr thSaS specIfied below Piltered elSe Preservative Added elSe VOCs Nutrients lOOmI Ytj ICL HO4 HØavyMetals 250th1 If lttO3 YJ All Other Non- Radiologics GrossAipha 250 nil L000mI NoPrŁservtive Added u2so4 Otherspecify SaniplS volume if preservative is used Specify Type and Quantity of Peservative rrcwc\nrt\CtfrC a-4-aooc Comments Arr4 Aee\tr nms 3p csrA 12k Prck L$ctl 4h Tvmsr 1Ui1L reS4 M1A\ 411_rllOU Arcij on O1Sc 5annItS trJCr-ogIg Lfl MosL4 Mill Groundwater Dischau-gePewtht GrotS Water Monitoring Quality Assurance Plan QAP Date 2.25.07 Revision Page 41 of 41 ATTACHIIllIIIENT WIHIILfl MESA U1tANMIM MILL DATA WOEJKSEIIEET FOR GROUIIIU WATER Description of Sampling Event IT uarLr -rouJ-tJ4Lr Sampler Location well flame Mu hIS Narn and initials ii cnvlcr 14 at LcL1 Date and Time for Purging .Th 2-Occ and Sampling if different Well Purging Equip Useth puthp or Well Pump if other than Bennet El Sampling Event PT C6k q.otLL cirtr Prey Well Sampled in Sampling Event MW It pllfluffer7.O 1.0 pflBuffer4.0 4.3 Specific Conductance Mi uMROS/cm Well DepthS Depth to Water Before Puging 77 Casing Volume 11 Well .24 .%.653k Well .36Th Conddflnbethr 32LS pli4fWt avg.1 C.7 Well Water Temp avg J4 filial 2C.Qi Turbidity .-Lt Weather Goad-________________Extl Mali Temp.prior to sampling event ie4H.T.dal.Purged g.g tinlc$.GaLPurge lIcLS Conductance__________________Conductance 27 plL__pfl. Temperature Jtj 217 Temperaturell4 .U fladnv flnIantioIRedoxPotentialEli Turbidity %.wt SWAtIIt Turbidity .11 Time 1600 GaLPurged Z.OS Conductance__________________ pR ...7L Temperature .O Redox Potential Eh tAd- Time tS Gal.Purged 3L- Conductance 3S pH tenSe IS Redox Potential Eli .4 jft-Groundcnter Discharge Permit Date 11.17.06 Revision Groundwater MOIIIWrIZIg Quality Assurance Plan QAP Page4l of 41 Tubidity Volume of Water Purged When Field Parameters are Measured_ pupin Rate Calculation Flow Rate in gpm S160 __________ Time to evacuate two casing volumes 2V Ttt2V/Q SI Mn Number of casing volumes evacuated if other than two If well evacuated to dryness umber of gallons evacuatet Naiua of Certified Analytical Laboratory if Other Than Energy Labs j-j4y \A3es4 L6 Sc Uocs of Sainile Sample Taken circle Sislile Volume Indicate It other ThSaA specified bCIDY Filtered circle Preservative Added circle VOCS -j 3x4Oml Yfi -.RCL Nutrients ECavy Metals All Other Non- Radiologics GrossAlphi Other specify C4 100 ml 250 bill. 250 ml 1000ml Sample volume It Hz$04 lIMO3 No Preservative Added H2S04 nr$ Ifs preservative is used Specify Type and Quantity of Preservative Comments Ar.u ort Slic Al N%t.acc fltArcAr 11%A __.ftlL.%4%.enrin knit 14u 111441.a nreseJ for kr a4crt So1\cS T\O\Ibic4w4hdasrcvswr4\pu.cr .- Mill GmuiidwaterDischae Permit Groundwater Monitoring Quality Assurance Plan C1P Date 2.2517 Revision Page4Oof4l MJTACMMENT Ii WRflfl ffiESA ZJRANIIUM MuLL JIIELED DATA WOEKSEET FOR GROZThJD WATER Description ofSamplingEvent Ctnrrt rrscanrk v3e.Lr M$L Sampler Location well name AA WaS alit initiaIs_1r if Date and Time for Purging COCt and Sampling if differant________________ Well Purging Equip Use or_bailer Well Pump if other than Bennet_________ yr L3kJ Samplingflvent CkAt Prey Well Sampled in SamplingEvent flAk plBufferlA 76 pflRuffer4.O .. Specific Conductance CJ 611 uMHOSIcm Well DepthS 1.\.3S3 Depth to Water Before Purging 7C Casing Volume 4fl Well .653k Well .367k Conductance avg 35 pH of Water avg 33 Well Water Temp avg 14 Lii Redoi Potenthi Efr2a1_Turbidity Weather Cowl s.rti Extl Ant Temp.prior to sampling event IC æme .14fO.daLPurged_______Tiizc QalJurged CondUctaace 3S5 Conductance___________________ pg______________________ Temperature L\Temperature // Redox Potential Bk 2.31 Redox P9th Bk Turbidity________________Turbidity__________________ Time Conductance ia Purg4_... pH Time Conductance GaL /e pH Temperat9re Red63otential Bk_________________ ct Teniperaffire wDatantinimh i3ro\cc cj Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Pitrhidftir Date 11.17.06 Revision Turbidity____ Page4l o141 Volume of Water Purged When Field Parametera am Measured pping Rate Calculation Plow Rate in gpm $160 _____ Time to evacuate two casing volumes 2V T2WQ__________________ Number of casing volumes evacuated If other than two____________________________ If well evacuated to dryness number of gallons evacuated____________________________ Name of Certified Analytical Laboratory if Other Than Energy Labs JAn \4cq3 LAV% Type of Sample Samole Taken citcki Sannile Volume flhdicAte ifother ihahai specified Soil Filtered circle Preservative Added cle VOCs Nutrients HØavyMetals ix4mi lOOm 2SOIht. .- U3 IC NH 1U04 IWO3 All Other Non- Radiologics 250m1 NoPtesrsrÆtiveAdded GrossAlpha l000ml 12S04 Other specify tncrCl r4MVC Sample volume If preservative is used Specify Type and Quantity of Preservative Comments Arr4 SrtDtIAo iitn Or IUL4 1t.her HOil ._I- Jctl- ct 4er LcL%ck if Lj rA- Grouadwater Discbage PeiToit Date 2.25.07 Revision Groundwater Monitoring Quality Msurance Plan QAP Page 40 of4l ANACIHEMBENT WIIII7UE IMIISA UIL4SNIUIJM MILL FIELD DATA WORSffIEET flIt GIItOUNII WAflIR Description of Sampling Event jsT Ou.Acr 6.routJ-WLr Sampler Location well nameLj4kl 31 Name ad initials avtnc j4 ctt eLy Date and Time for Purging 2.-C-2ooq and Sampling if different N/A Well Purging Equip Used .putflp or _bailer Well Pump if other than Jennet El Sampling Event cLL ..e31JaLr Psev Well Sampled in Sampling Event A/f pliBuffer7.O 7.0 pHBuffer4.0 43 Specific Conductance Mi uMLLOS/cm well Depth 1.5 Depth to Water Before Puging 51 .l2 Casing Volume Well .L .653k Well .367k CoiidU.taiSÆt j.I2-..pHf%tatorivg Well Water Temp avg iPdtætial y3_Turbidity 15 WeAther Cond tj Extl Amb Temp.prior to sampling event O4O Gal Purged TUne 1000 Gal Purget let Conducance 1fl3 Conductance pW_..IX Temperatine .3 Temperature .tla Redox Potential Eli 37 c1 Redox Potential Eli 37 Turbidity Turbidity ii Time 0O Gal Purged 21i Time 4050 Gal Purged 3C.3 Conductance 1.Conductance 74 Temperature 14147 %rnerare 19116 .. RedoxPotentialEk RedoxPotentialEh M31 Mill Groundwater Discharge Permit Date 11.17.06 Revision QrouadwaterMonitoripg Quality AssurancePlan QAP Page 41 of 41 Turbidity Turbidity__________________ Pum4in1 Rate Calculation flow Rate 03 in gpm Time to evacuate two casing volumes 2V 5/60 _______________T2V/Q r7t Number of casing volumes evacuated if other than two If well evacuated to dryness iiumber of gallons evacuated___________________________ Name of Certified Analytical Laboratory if Other Than Energy Labs CA tJcJ Lc Type of Sanupk Sample Taken circle Sisbie Volume hulicate if other Tha1 as specified below Filtered circle Preservative Added circle VOCs Nutrients RiavyMetals All Other Non- Radiolqgics GrossAlpba Other specify Ct 4ci 100 ml 250th 250m1 1000nil Sample volume iS RCL H$04 NorresrvativeAdded 112S0 rencnJt rPtnrc\ If preservative is used Specify Type and Quantity of Preservative comments J\yrvj nacr i-011 .L.4. pckr%utt anJ Snnpttnc ..unt Pv eos rocc4 .fpxisa./-Vvt rnlecL nAbo iIt u1tAr Mill ironadwater Discharge Parnilt Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 JRevision Page400f4l ATTAC4IIENT 11 VV1IIITE R4IIESA EJflNUffJM MJIILIL FILELD DATA WOEKSIBIIEET FOR GEOUND WATER Description of Sampling Event Oaot4cr rrovqr.A LkLr Sampler Location well flame jtkd .YiS Name add iditials ii ovw 14 i16L Date and Time for Purging .L1 1XY%and Sampling if different pJ Well Purging Bqttip Used puthp orjailer Well Pump if other than Rennet El Sampling Event ..k kiO.L-Prey Well Sampled in Sampling Event pklBuffer7.O 7.0 pliBuffer4.O 4.0 Specific Conductance Vtl uMflOSIcm Well Depth Jig Depth to Water Before Purging 74 Casing Volume Well IA 71 .653h Well .361k conduthnce avg 0tL1 pH of Witer avg Well Water Temp avg RStentiaI h30_Turbidity Weather Coud ./j Extl Auth Temp.prior to sampling event Time jTC ClalPurged TUne 1500 GalPurged Conductaace O3 Conductance 4C c.Oc1 pJ4__________________ Temperature __________________ Redox Potential Q3h 309 Turbidity 17 ____________________________ Time Gal Purged 2C.4 Conductance 4O.O PH ua Temperature Redox Potential Bk 353 t.r Temperature_L\ Redox Potential Bk Turbidity 53 Time dDO GaL Purged 33 Conductance Lk03.L1 trnierature iMI3C Redox Potential Bk______________ -t Mill Groundwater Discharge Permit Date L1716 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 41 of 41 Turbidity ___Turidity_ Volume of Water Purged \uiJfr1iiblUaftmgtSadc$estt1 Pmnpnj1e CalcUlation Plow Rate in gpm 5/60 _____ Time to evacuate two casing volumes ZV T2V/Q jc Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuatet Name of Certified Analytical Laboratory if Other Than Energy Labs m-r L-F.$ Jygie of Snnik $nrnple Tnkeni circle Smiiple Vohune indicate if other ththkal specified below Filtered circle Preservative Added circle VOCs 3x4011 YJ flCL Nutrients HØavyMetals All Other Non- Radiologics GrossAipha Other spec Wy .N 100 ml 250th1. 250 nil l000mI Sample volume iNStN $z$O4 HNO NoPrasŁrvative Added 112504 It yUtcn4 Jnrtccn.o Ifapreservativeisused Specify Type and Quantity of PreEervative taaner 140 II6L1i nrStJ lirComments..Zk Lr tJa4ert SArifl AcO\C-o \ca Jk.fl 4hro\nn$ -L Ptrcbisa LS ic.ii pucc AflACIHIMEN WRIIITIE MESA Ut4PdILUM MULL 11111LD DATA WUS1BIIEET IFOR GROUND WAT1EIR Description of Sampling Event Ouoc%tr 6-rou.J-Lc.Lr Sampler Location well caine Mi .Yk Name and thitials1T 14 1U6L1 Date and Time for Purging .-3 300C and Sampling if different Well Purging Equip Uset puffip or_bailer Well Pinup if other than Bennet EEL Sampling Event c1.L _rJJLr Prey Well Sampled in Sampling Event ik pl-IBufferl.O 7.0 pHBuffer4.O 4.0 Specific ConductanceAl nMILOS/cm WelJ Depth.t1 Depth to Water Before Purging ICS Casing Volume Well IS S7 653h Well .367k Cun4tttsnCeiVg pHflŁrivg.C..SQ Well Water Temp R4Ptrtat Zift III Turbidity Wedther ond.________________Extl Amb Temp.prior to sampling event Time lUIC Gal Purged MC Time fOUS GalFurged 11 Conduciasice 9717 Conductance q77t pg -53 pH Temperatum 19 TemperatureS9 Redox Potential Eh_Redox Potential Eh tj Turbidity______________Turbidity ______ _______TimeJNC GaL Purged i8 xDS ________________Conductance LI7G7 Mill Gwtmdwater Discharge Pnnft Groundwater Monitoring Quality Assurance Plan QAP Date 225.07 Revision Page4Oof4l ct Time 31L GaLPurged 1945 Conductance________________ pL Temperature Redox Potential Eli II Lj tsh tu11eratui jL.C Redox Potential Eli jfflrounthwzterDischargePamit Date 1l.l7O6 Revision Groundwater Monitoring Quality Assurance Plan QAP Page of 41 ___Turbidity Volume of Water Purged When FleW Parameters are Measure jflpinzRSQaicul4tioxk PlowRnteQXingpnL 5/60 ____ Time to evacuate two casing volumes 2V T2VIQ gq Number of casing volumes evacuated if other than two_ If well evacuated to dryneÆs number of gallons evacuate Name of Certified Analytical Laboratory if Other Than Energy Labs Cn ec\Lct Sc rvpe ot SainÆple Sanille Taken kfrcke Sanujile Volume in4lcateiifothØr tul al specified circle Preservative Added circle VOCs 3t40Sl HCL Nutrients HØavyMetals All Other Non- Radiologics JrossAlpba Other specify 9f 100 ml 250th1 250 nil 1000ml Sampl volume NI /1 H2$O4 111403 NopthsŁrvthtiveAddŁd RzSO4 Ct QJ ratcr$nr6dtntth If preservative is used Specify Type and Quantity of Preservative OLtAt LIIC rlv.riiq %cactrAs -t g.4 Comments ArruJ on Sc tasInn Uti0t41 nreceIJ .Gr .az.t.QLL \3e$kr anA Pft4tk tlrcr Licor snnpUn urnt Pv cnAfc tl3L 4Mc An 4cecf AAfr cr 7L bexe .\rrcF tQlSfL1cMkWLLcsi0f4 .- Mill C-rnundwater Discharge Peruiit Groundwater Monitoring Quality Maurance Plan QAP Date 2.25.07 Revision Page 41 of 41 ATTACIIILMENT Ii WIFIITE WBESA UIItANRYM 4IIIILSL FHELITh DATA WORJ FOR GROUNJD WATER Description of Sampling Event Ouko.s4cr rounA WcLr Location well name P4u 30 Name anti ntaIa 11 Jate and Time for Purging 1OcA and Sampling if different________________ Well Purging Equip Useth puffip or_bailer Well Pump if other than Bennet El Sampling Event liQ.Mk Prey Well Sampled in Sampling Event Jffr pHBuffer7.0 7.0 pHBuffer4i LLO Specific Conductance Vtl uMHOSIcm Well DepthS ItO Depth to Water Before Pwging .0%Casing Volume Well iO ..653h Well .361h CozktetsinceÆtg 2i 23 j$HtWainriv 1.O Well Water Temp avgj 13 Rtfbx PU1 ih a47 Turbidity WMther coed unA Extl Amb TŁmp.prior to sampling event 3c tmeflSa..._CIa Purged C.4 Tibie iD Q4Purged1 comiucance 2%I Conductance -t pH i.Oc\pfl.1% Temperature Redox PotentialEh t4 Turbidity fr3 Temperature_________ Redox Potential Eh Turbidity Time O4LS GaLPurgedZlPt75_Time CY%SO latPurged 3.5 Conductance -J Conductance 137 Temperature rg9 Temperature 1393 Redox Potential Eli at Redox Potential Eli L1S trb.-.0 t-b_--.aS Man UIbZMIIJ ji jlt-GroundwaterDischargePermit Date 11.17.06 Revisiojv Groundwater Monitoring Quality Assurance Plan QAP Page 41 of 41 p.n4rThit Turbidity_____ Volume of Water Purged When Fiet Parameters are Measure Rate Calculation If well evacuated to dryness number of gallons evacuated. Time to evacuate two casin volumes ZV T2V/Q Name of Certified Analytical Laboratory if Other Than thiergy Labs ck vJ 54 oI OCs yne of Sausilu Sample Taken cirde Siiible.Volume indicate if other ihflIÆi.spedfied flfrere4 circle Preservative Added circle belw vocs fi RCL Nutrients CS lOOml NJ 02504 HØavyMetals All Other Non- Radiologics GrossAipha Other specify 250kb 250 ml 1000ml Sample volume jl IINO3 NoPreservativiAdded 05504 rtncr$Cs If preservative is used Specify Type and Quantity of Preservative Comments Ayr.uJ pfl S11C 0Ł O1 %siancr pus.csp altJ\SmrvipUnti tfurflf Ptnt beaa cnAfck kmn inn %ae%%ttr sC H0 III ofcc Lcf ALQr \Jakcrt ct-Iinsp1t Plow Rate Qingpin 8/60 _____ Number of casing volumes evacuated if other than two_ Mill G-roundwawr Dischacge Permit Date 2.25.07 Revision froundwaterMonitoruig Qualic.y Msurance Plan QAP Page 40 of 41 AflAC1llilbfflNT ii WIIIII1TJE 14IIEA URANJIUM MILL F/fIELD DATA WOlit1LfflCET ThR GIROUND WATER Description of Sampling Event Otxacbtr rrou.J-L1L Sampler LocationWellilame Mw 31 Narneadinitials tU tenncr t4DtLcLj Date and Time for Purging 1-3-2OO and Sampling if different______________ Well purging Equip lfJseth X.purap or ...jailer Well Pump if other than Benpet Sampling EventJL.cA.asJJAL Prey Well Sampled in Sampling Event MJ pHBuffer7.O 7.0 pHfluffer4.O 4.0 Specific Conductance t1 uMHOSIcm Well DepthS 3O Depth to Water Before Pwging7 217 Casing Volume 1/Well 3.43 .653k Well .36710 cotiduØtancÆvg 71L ...1.dttivg 7.31 Well Water Temp avg H30 I$ij Pets at Eh319 Turbidity Weather ond Extl Ant Temp.prior to sampling event ThnejO iaLPuEged 4.Q5 Titus-UqO QaLPUrged tS Conductance 17 Conductance l7i- pH 7.33 pU Temperature L\23 Temperature Redox Potential Bk Redox Potential Bh Turbidity Turbidity Time ItO Gal Purged aq .75 Time 14 OS Gal Purged i3C3 Conductance Conductance__________________ PH 7.2 7.30 Temperature Q3 Mtum 14 RedoxPotentialEh .2t3t RedoxPotentialEh_____________ 1as .. MillGroundwater Discharge Permit Deatc 11.17116 Revision Groundwater Monitoring Quality Msurance Plwi QAP UWMULJ____ Volume of Water Purged When 1014 Parameters are Measure Pumping Rate Calculation Page 41 of 41 Plow Rate in gpni S160 ____ Time to evacuate two casing plumes 2VT2WQr5M1 Number of casing volumes evacuated if other than two_ If well evacuated to dryness tiumber of gallons evacuate.ci Name of Certified Analytical Laboratoty if Other Than Energy Labs mo ck oNmcs Type of Samile Sample Taken ciSe Sable Velume iædjeateifothØr thati a specified below Filtered circle Preservative A44$ circle VOCs Nutrients RØavyMetals All Other Non- Radiologics GrossAlpha Otherspecify 3x40S1 loOm 250S 250 ml L000m Samplvolume fl tj EEL II2$04 fl5 lIMO3 No Preservative Added HSO Cnntr$lrtArtatcS If preservative is used SpecifyType and Quantity of Preservative Comments Arruci jao tnncr 14ul1tcuigascLfi pc cnA snvtptne4 eunt 01St fj4rUntAvs 1ai s.tStr \Oalcrt AJV1IC \Tt4Cj O- .hflfl j/cAcr UcraLoU 4s\c rs Mill Crotmdwater Discharge Permit Groundwater Mothtoring Quality Maurance Plan $2 Date 2.25.07 Revision Page 40 of 41 itrtA4j BrGYcr Oh Ifr ko taXi 5.- ATTAC1II1MNT WJIIUFJfiE IMBESA URANMJM MILL PIUELII R4TA WOJR1L1BhlEET GROUND WATER Description of Sampling Event OaocLr rrou.J-kj3jr DwiA4 Sampler Location well name /Wp 31 Name and initials tnrtce 14611 6L1 Date and Time for Purging 2--20\and Sampling if diffeftnt Well Ptuing Equip Useck puthp or_bailer Well Pump if other than Bennet El Sampling Event cA_Cmt.pA.i3L-Prey Well Sampled in Sampling Event______ pllBufferl.O 7.0 pHBuffer4.0 Specific Conductance VIII uMHOSIcm Well Depth 132 .5 Depth to Water Before Purging 71-72 Casing Volume 114 Well 3S 77 .M3h 30 Well .361k Conduttatnce avg it pH of Water avg Well Water Temp avg Re4i PotºæflÆl.M Rb Turbidity G.3 Weather Cond 5c.nn Exti Amb Temp.prior to sampling event tC Time I0.O.IaLParged Tirnei14 QaiPOrged ac ConchictanUe 415 Conductance____________________ pit Temperature 13 gf4 Redox PotentiatEh Turbidity 188 Temperature -L Redox Potential Eli Turbidity TimeJ3pO GaL Purged Conductance t4 100 m.i Time t340 GaL Purged Conductance 1-1 pH L-Mt Temperature -.ttnqierature Redox Potential Eli SZ Redox Potential Eh tstrb ifl-GroundwaterDisthrgePermit Date 11.17.06 Revisiorr Groundwater Monitoæng Quality Assurance Plan QAP Turbidity_____ Volume of Water Purged When Field Parameters are Measured pjng Rate Calculation Page4I of 41 Flow Rate OJD in gpnt S/60 ____ Time to evacuate two caning volumes ZV T2VIQt .21C Mk fl If well evacuated to dryness number of gallons evacuated Name of Certified Analytical Laboratoty if Other Than Energy Labs4nci tJcs\-Ia 3d or \JOCs ZYP of Sample Sanigde Taken circle Sample.Volume indlSteltatliŁr thOu as specified .... Filtered circle Preservafive Added circle VOCs 3x40rn1 Y1I ..-HCL Nutrients HŁavyMetals lOOmI 2SQikd czt 02S04 S11 DM03 All Other Non- Radiologics 3rossAlpha 250 ml .. 1000mI 33 jt No reservativAddŁd H2S0 tN Other specify nu4 J1tprctst Sample volume If preservative is used Specify Type and Quantity of Preservative Comments art Itt tnnrr 14 1IJCUI rireceAJ Cr JDctPc4e OJtJ Sottne -f Prg bd4ixs IIsoj JknA4.dL .foLo MaJrts..4 ic P\L\tfl PM oltmLr tFOa%Crt cnAeA LcV stc fl2 Number of casing volumes evacuated if other than two_ Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 2.2517 Revision Page 40 of 41 Time Gal Purged Conductance________________________ nTJ Potential Eh kflAC1HII4IIENT WHliTII MSA UL4NEftJM MKIAL FIIIEILJTh DATA WOiISRlEET FOR OUUTh WATJER Description of Sampling Event t.ccrcrL GrovAc1 kAh.t4cr .USampler Location well name ML Name alit initialsAncr ii Date and Time forPurging S-ZOO and Sampling if different N/i Well Purging Equip Use or_bailer Well Pump if other than Bennet Sampling Event_____________________Prey Well Sampled in Sampling Event ni pHBufferl.O -TA pBBuffer4D 140 Specific Conductance qi uMHOSIcrn Well Depth /0/4 Depth to Water Before Purging rn/I Casing Volume Well al/A .653k 3h Well .vrn .361k Conduttince avg pH of Water avg Well Water Temp avg 14 .fC R1ikiOtelitW L1L turbidity Weather Cond._________________Extl Amb TŁmp.prjor to sampling event_________ Tune lOW .il.Purged Tile Oat Purged Condctauce Conductance________________________ pH pH Temperature Ic Temperature Redoic Potential EhJjCA Redoxot6ial Eli_____________ Turbidity Tclity__________________ Time_________ Conductance Gal Purged pH Tern lCIox Potential Eli________________ jyjill Groundwater Discharge Permit Date U7116 Revision uroundwater Monitoring QUffiYMSUThIIcOPIWIQAP Page4l of 41 UWSLSflJ irbidity Volume of Water Purged When Field Parameters are Measured WA fgpping Rate Calculation Flow Rate 03 in gpm Time to evacuate two casing volumes 2V S160 ________________T2V/Q u/A Number of casing volumes evacuated if other thin two___________________________ If well evacuated to dryness number of gallons evacuated___________________________ Name of Certified Analytical Laboratory if Other Than Energy Latis pier COV\kis4 ZY2i of Snmnle Sample liken feirciel Smote Volume indicate if other Filtered circle Preservative Added circle tlias.specifled below VOCs 3x40m 111 jt Nutrients Z5 lOOmI HO4 avyMetals Vj 250ihi 1X 1K03 it TAil Other Non- Radiologics 250ml NoPresrvativiAdded GrossAlpha Jt l000ml Ct IIaSO4 fli Other specify LrCflcro\flflCrAAtC\ Sample volume Ifapreservativeisused Specify Type and Quantity of Preservative Comments ATr.0A L4 o6S Cnncr 4oIlcL1 prtheni cor Mv Czt c.rV\porc1iAAer cub 41cc ALJYItS LS LJ n-zn Mill Greaudwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 Revision Page 40 of 41 AflACIHIMENT 11 WIHIKTJE MESA MItRAL FJIIllLD DATA WOESHEET llkMt GROZThID WAflE Description of Sampling Event OtwLr 6-rouJ \Qr Mmfl4n Pch Sampler Location well name Mk Name aitd initials..ttt L.uncr ii Ld.cj Date and Time for Purging 2Oct and Sampling if different Well Puting Equip Use Z.pufflp or_bailer Well Pump if other than Benpet Ei Sampling Event QL .rLL c.Lr Prey Well Sampled in Sampling Event plBuffer7.0 7.0 pHBuffer4.O 4.0 Specific Conductance uMHOSIcm Well Depth Depth to Water Eefore 1ut-77 7i Casing Volume 114 Well 11 .553h Well .36Th Condttbnce avg pli ot Water avg Well WaterTemp avg___________Ld Potential ik Turbidity Weather Cond.________________ExtI Amb Temp4irior to sampling event tO Tinie 31 Purged TiS Gal Purged Condlicunce_________________Conductance___________________ pH Temperature Temperature Time Conductance Gal Purged nil______________ Time Gal Purged________ Conductance__________________________ pH .7 Redox Potential Eh__________________ Itedox PotuuIWhi Tubid___ Redo79teal Ehj Turbidity Temperature Redox Potenqi .1 Mill Groundwater Discharge Permit Date 1117116 Revisiorn Groundwater lvloiiitoring Quality Assurance Plan QAP Page4I of4l Turbidlity Turhidlift Volume of Water Purged When Field Parameters are Measured___ pumpinØ Rate Calculation SElL Number of casing volumes evacuated if other than two If well evacuated to dryness number of gallons evacuated___________________________ Name of Certified Analytical Laboratory if Other Than Energy Labs Type of Samule Sample Taken chde Siinile Vchime indicate if itheE thfS specified below Filtered circle Preservative Added circle \TOCs Nutrients HØavyMetals All Other Non-Ris GrossAlpba Other specify tY 3x40in1 lOom 250li 250 ml IJ000mI Sample volume YR /t HO4 ffib03 NoPresbrvative Added H2SO ti If preservative is used Specify Type and Quantity of Peservative ArruJ or -Wutickq.L4r anJ Rk ct L4crt Sat.nfsiinci utnt ks x4 JL4 rqjeA4cAL Let sftc QD fl Flow Rate Qin gpm 5160 _____ Time to evacuate two casing volumes ZV TZVIQ Comments fltAPcr Mill Creundwater Discharge IPermit Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 Revision Page4Oof4l ATTACHMENTWIMESA URANMJM MILLLDDATAWOflSJBOEETFORGROTh1D WATER Description of Sampling Event S1 ZWA4IP rrauAA CLrr Sampler Location well name MJ 7O WarnS ahd initials eitner Date and Time for Purging 2-u and Sampling if different Well Purging Equip Used Ipump or Well Pump if other than Bennet Sampling Event 1t.4ttt GrsJ A-4i Puw Well Sampled in Sampling Event AWIt pllfluffer7.O 7.0 pHBuffer4.O MO Specific Conductance 441 uMROSIcm Well Depth Depth to Water Before Purging ID Casing Volume 49 Well .653h 35 Well .367h ConduOtnce avg pH of Water avg Well Water Temp avg fle41dt Turbidity WeatherCoild A47 Extl Ant Teitptprior to sampling event CC time GaL Purged_______Tie Gal urged ... Conductance .-Conductance ..eTc Conductance .. pH Tempentem RedoIcntinl Fh. D9V M1\ Mill Groundwater Discharge Permit Date 11-17-06 Revision Groundwater Monitoring QualityAssurancePlaflQAP Pe41 of 41 sw-tnt-I Volume of Water Purged WicFiE1arlPitasiitJMeasud fjgp jn Rate Calculation Flow Rate QingpnL Time to evacuate two casing volumes 2V 5160 ______________T2VIQ i5 Number of casing volumes evacuated if other than two -7 If well evacuated to dryness number of gallons evacuated_____________________________ Name of Certified Analytical Laboratory if Other Than iergy Labs p1 Cy Je.s L46 Type of Samule Sample Taken cirde- Snuile Volume indlthtØfither thÆijaIgpeeJedJ4 Filtered circle Preservative Added circle VOCs ft iN 3x40m1 .Y 1t1 .-IICL Nutrients lOOmi H2SO4 HØavyMetals 25Oibf tN All Other Non Radiologics 250rn1 .t NoPresØrvativeAddØd GrossAlpha Other specify L000mi SampIS volume 112504 Jj If preservative is used Specify Type and Quantity of Preservative Comments \u6 JA .1k Time On Gal Purged .7 Conductance 32 pH___________ Temperature f3 .7 Redox Potential Eli IYc Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 Revision Page 40 of 41 ATTACHMENT WHLKTE MESA MILL FIIELILP DATA WORKSHEET FOR ROUND WATER Description of Sampling Event IA rr OAflk AJoicr Sampler Location well name MUd p4 Nanie and initials itt -a Iit4ag 1T 14 Date and Time forPurging %3.thDOC and Sampling if different Welt Purging Equip Use jpump or Well Pump if other than Bonnet Q12 SainplingEventt1Los frrnJ \tO-Prey Welt Sampled in Sampling Event iQ/æ pHBuffer7.O 71 pHBuffer4.0 Specific Conductance CICt1 uMHOSfcm Well DepthS 25.7 Depth to Water Before Purging 014 .2 CasingVolume Well IS 11 .653k Well Aft .367k CoEdtttÆflceavg f7 pH of Water vg Well Water Temp avg V3 RŁdox Potential lb 40c Turbidity 11 Weather Cond tIJA Bitt Amb Ternp.priorto sampling event time McLIO GaL Purged 33 Thpe qQg GaL Purged Cj.C Conthictauce__________________Conductance Th5 3Z pH ii4\j4 Temperature Temperature 13.70 .4 Redox Potential Eli 3C5 Turbidity Redox Potential Phi I.s Turbidity Time OflC3 Gal Purged t\6 Conductance 3$jC pH Redox Potential Eli 1O Mill Groundwater Discharge Permit Date 11.17.06 Revision Groundwater Monitoring Quality Assurance Plan QAP tLtUWV Turbidity Volume of Water Purged When Field Parameters are Measured frpjig Rate Calculation Page4I of 41 Flow Rate in wm 8/60 33 Time to evacuate two casing volumes 2V TZV/Q 11 Number of casing volumes evazuated if other than two If well evacuated to dryness number of gallons evacuate iufX Name of Certified Analytical Laboratory if Other Than Energy Labs_______ Type of Sample $upiple Taken circle Sªniple.Volume indicate if other Than aS specified below Filtered circle Preservative Added circle VOn 3x40m1 HCL Nutrients 100 ml LW EØavyMetals All Other Non- Radiologics GrossAipha thP 250th 250 ml 1000 ml RHO3 No Preservative Added 112504 it Other specify LW Sample volume If preservative is used Specify Type and Quantity of Preservative 1LiiL_reSc.ni 4e tL k.Ar ci ttnSt Az\ Comments \-ncc1 LtVr citikuc unr 4jAct 4-jpipf-iL-141rMv.Op\ J3..hfr Ct-rrr cJc nj PtAr4JSJ iocr/%rItc IO7 Thxcr 41\ Date 2.25.07 Revision Page 40 of4I AflACMENT WEIIITJE MESA URANIUM MXLL flEW DATA WOEKSJfl YOR GROUND WATER Description ofSaniplingEvent .4nkXdu YAIA$\klCr 9cppqOlC Tt%AlAr Sampler Location well name k\A 14 Name and initials icincr 4biIlcLJ 1f4 Date and Time for Purging aoO5 and Sampling if different Well Purging Equip Useck .Ipmp or _bailer Well Pump if other than Bennet Sampling Event M6t..k4 k\JJtV Prey Well Sampled in Sampling Event 1J/Pr pHBuffer7.O tO pliBuffer4.O Specific Conductance %fl uMHOSIcm Well Depth Depth to Water Before Pigging 104.40 Casing Volume Well IS .S .653h Well .367li Condutanceavg 38k pH ivg cm Well Water Temp avg RºdPx POtenthil h2t.t9 Turbidity CT Weather Cond S.enaJy Extl Amb Temp.prior to sampling event Time Mbt3OOaLPurged Conductance .zC\ Time Gal Conductance 372 .Purged j4c C.7c Temperature .OTemperature6\fc Redox Potential Eh U1RedoxPotentialRh2-S5 Turbidity_________________Turbidity Time 104S Conductance Gal Purged k1 i-IS NS4 plU Temperature L7\ .3 Thne4fl5 GaLPurged 2MS Conductance 31j3 pH Temperature Redox Potential Eli Mill Groundwater Discharge Pennft Groundwater Monitoring Quality Msurance Plan QAP Redox Potential El_______ .4 tA joundwaterDischargePersnit Date 11.17.06 Revision Groundwater Monitoring Quality Assurance Plan QAP Tirhfr4ihz Page4l of4l Volume of Water Purged When Field Parameters are Measured_ gpng Rate Calculation LS Flow Rate in wm 5/60 _____ Time to evacuate two casing volumes 2V T2V/Q GjL iX- Numberof casing voltinies evacuated if other than two_ If welt evacuated to dryness number of gallons evacuated Name of Certified AnaLytical Laboratory if Other Than Energy Lab Type of Sample Saniule Taken circle Snnule Volume indicate if other thS as specified below Filtered circle Preservative Added circle VOCs Nutrients Heavy Metals N\3x40m1 lOOmI 250S .. di Ha 2P H2S04 LIMO3 All Other Non- Radiotogics 250 ml No Preservative Added GrossAipha Other specify L000ml Sample volume H2S04 If preservative is used Specify Type and Quantity of Preservative Comments gr tAtfir i-.X LIxraOliAtl fL O4tS tnnpr -WLi Drcccn\ PL3sLcU4k cJ3A\cr \r5.x\\r S 94 r.r kcauj MA4 tkarS3 CJCV\ OMYw4r 4kcrPc Pr ha r4iA it Jr jlu ci O96- 3O Mill Groundwater Discharge Permit Date 2.25.07 Revision Ground Water Monitoring Quality Assurance Plan QAP Page 40 of 41 Description of Sampling Location well name./kuJ Name and Date and Time for Purging 443k.Lcrc\and Sampling if different Well Ttugiuig Equip Used _purup or _bailer Well Pump if other than Bennet Sampling Event Tt r4i3 .L-Prey Well Sampled in Sampling Event Mth pHBuffer7A 7.0 pHBuffcr4i q.C Specific Conductance ljQ5/Well DepthS 1J. ii$pthto Water Before Purging M7 Casing Volume IT 4t1 Well .653k Well .367k ConduŁtiaceavg 3000 pffofWatŁrivg .7O Well WaterTemp avg 13 RŁdpxPtthtial Zi 301 Turbidity Y-4 Weather Cond Extl Auth Temp.priorto sampling event C- ime Gal Purged Tines Gal Purged Conductance 3030 Conductance pg LiD pH /7 Temperature J1 Temperature Redox PotentialEh 3t Redox P9thal Eli_______________ Turbidity -04 Tii AflACIEIMENT WHITE MESA URANIUM MILL Time Gal Purged Conductance .7 penwre Redox Potential Eh._Redox Potential Ehk Mill Groundwater Discharge Permit Date 11.1716 Revision Groundwater Monitoring Quality Assurance PS QAP Page 41 of 41 UWIUU.J__Turbidity Volume of Water Purged When Field Parameters am Measured_________________ ggjgate Calculation Row Rate in wa Time to evacuate two casing volumes 2V sioo 33 T2V/Q_________________ Number of casing volumes evacuated if other than two if well evacuated to dryness number of gallons evacuated Name of Certified Analytical Laboratory if Other Than ergy Labsaua Tyne of Samile Sample Taken circle Simble Volume indicate if Other thi as specified below Filtered circle Preservative Added circle VOCs Nutrients HØavyMetals All Other Non- lb 3x4Oml 100w 2501111 250 ml 14 cl3 fJ neL iv Ii HO4 ZINC3 tJN No Preservative Added Radiologics Gross Alpha Other specify 33 1000 ml Sample volume 14 112504 If preservative is used Specify Type and Quantity of Preservative Commeits cc1tv\\i. On rcqij iS\9L 4e 6th cF 103O 1Linr 0tlj Vo1 r0 aser 4bui vqjxk h-.t bcn uSaatL.r ktiA4f SApU 15 drcr6 c11i caIA Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP AflACHii WifiTE NiIISA URAIkJILVM MIlL FIIILD DATA WOR1S1BllEET FOR GROUND WATER Description ofSamplingEvent M0fl4 \tA czwiplc Ttnw Sampler Location well name MfiJ Name and initials Aa-If Date and Time for Purging J-i1o-incP and Sampling if different A/A Welt Purging Equip Useck 3LPUffiP or _bailer Well Pump if other than Bennet_________ Sampling Event_____________________ pHBuffer7.O 70 Specific Conductance 17 uMHOSIcm DepthtoWaterBeforePutging 1I .q ConduttAnceavk 330C Well Water Temp avg_J i4 Weather Cond Svnn ExtI Time4l4 GaLPurged Conductance Z3Q pH Temperature Redox Potential Eh $9 Turbidity Turbidity Prey Well Sampled in Sampling Event MU pHBuffer4.O L4.b Well DepthS I31 .33 Casing Volume CV 40 Well .653h Well .367h pH of Water vg RºdbicPoteiitiat Ek t3 Turbidity Amb Temp.prior to sampling event c0 Date 2.25.07 Revision Page 40 of 41 Thji Gal Redox Potential Eh .4 Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 11.17-06 Revisiorn Page 41 of 41 Volume of Water Purged When Field Parameters are Measure pjggjate Calculation Flow Rate in gpm 5/60 _____.33 Time to evacuate two casing volumes 2V T2V/Q__________________ Number of casing volumes evacuated if other than two If well evacuated to dryness number of gallons evacuate4________ Name of Certified Analytical Laboratory if Other Than Energy LabsL yne of Samile SampIe Taken circle Sample Volume indicate if other luaui specified below Filtered circle Preservative Added circle VOCs 3x40m1 ..-Ha Nutrients 100 ml 7W Heavy Metals All Other Non- Radiologics 250th 250 ml 11M03 No Preservative Added GrossAlpha Other specify jj 1000mI SampIC volume H2S04 If preservative is used Specify Type and Quantity of Preservative Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP AflACHMENT Wffl MESA URANMJM MUILL flEW DATA WORKSHEET ThOR GROUDWATER Description of Sampling Event 0L4 -ccxxnA cAer t5tiniytri Sampler jJ Location welt name n-4uC 32-Name and initials arincc JtJpl Date and Time for Purging J..R-noCt and Sampling if different Well Purging Equip Tfseck Lpump or _bkiler Well Pump if other than Bennet fl Sampling Evenccucrt rpLALJ-Prey Well Sampled in Sampling Event MIA pHBuffer7.O 70 pllBuffer4.0 9.0 Specific Conductance 41 uMHOS/cm Well DepthS 3l Depth to Water Before Purging 25 Casing Volume Well p7 .653h Well 367k CondtiŒtdnce avg 394 PH oIWatŒrvg1 Well Water Temp avg j3 .7X RedflPoteætial Sli l1 Turbidity 5I Weather cond S1 Extl Amb Temp.prior to sampling event Eiime ChLPurged TiUie t301 GaLPurged ILS. Conductance 31 Conductance LJ p11 pH Temperature b.Z3 Temperature________________ Reclox Potential 13k _______ Turbidity Date 2.25.07 lRevision Page 40 of 41 Redox Potential Eh Thrhiditv Time..J5D Gal Purged 94 Conductance__________________ i.5c Temperature Redox Potential Eh_J 10 1u4 Time \WO Gal Purged 3C3 Conductance 390 C\ Temperature Redox Potential Eli ji MU Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Turbidity Date 11.17.06 Revision Turbidity Page 41 of 41 Volume of Water Purged When Field Parameters are Measured Pumping Rate Calculation Flow Rate in gpm 8/60 32 Time to evacuate two casing volumes 2VT2WQ2-VS /% Number of casing volumes evacuated if other than two_ If welt evacuated to dtyness number of gallons evacuated_ Name of Certified Analytical Laboratory if Other Than Energy Lab Al I/I Type of Sample Samnle Taken circle Saumle Volume indicate ifØther thiS as snecified below Filtered Preservative Added circle circle VOCs 3x40m1 1j ..RCL Nutrients lOOm H2O4 NJ BØavyMetals 250th1.Ct LIMO3 All Other Non- Radiologics 250 No Preservative Added GrossAipha Other specify L000mI Sample volume 112504 If preservative is used Specify Type and Quantity of Preservative Comments Sf1c %OO.1tpOrf i\ AJ wrX.tc c.ucw\.a.cn \1e.a\t4Y u$$JL_ ..\i2 .-erp\i rA 14 10 14..%.N c4\ 4i24kti jig14_1\lLt Yhxr\C\ jjrnA\cc 5A0svit 14jL ... Casing Volume Well 35 .H .653k Well .367kPWt Sthc Ptstial Eh0-j Turbidity ExtI Amb Temp.prior sampling event Tirne O0 GaLPurged jg.c Conduct nce_3 aos Time 1D Conductance GaL Purged Z% p11 Temperature Redox Potential Eh Mill Gzuuadwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 Revision Page4Oof4l ATTACHMENT 11 WIIHTIE MESA URANHJM MHLLMDDATA WORKSHEET FOR GROUND WATER Description ofSaniplingEvent fitbrt4hik rrouak IjccLr icuvi.lce Or.Mec-4 Sampler ___________________Nameaudinitials HoltAe 1T11Locationwellname.uu.j Date and Time for Purging k2.C -2004 and Sampling if different Well Purging Equip Useck .Lptuflp or_bailer Well Pump if other than Bennet jf Sampling Event i-A vrou4 Adtt Prey Well Sampled in Sampling Event MvJ aZ pl-lflufferl.O 70 pHfluffer4.O 4.0 Specific Conductance 117 uMHOS/cm Well Depth IT\.S Depth to Water Before Purging 71.13 condUdtªnceÆvg S5n3 Well Water Temp avg .D\ Weather TimeJSfl CaLPurged G.C- Conductance 8Y\ pg Temperature Temperature Redox Potential Eli \.2 Redox Potential Eli Lf Th TurbidityTurbidity Time NUT Gal Purged .7 Conductance L5S Is TemperatUre 14 fl Redox Potential Eli ao lu5rb tr Mill Groundwater Discharge Permit Groundwater Monitoring Qwility Assurance Plan QAP Date 1117.06 Revisiorn Pirh Page 41 of 41 Volume of Water Purged When Field Parameters are Measured ggping Rate Calculation flow Rate in gpm Sf60 3e3 Time to evacuate two casing volumes 2VT2WQiU7 Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuÆte Name of Certified Analytical Laboratory if Other Than Energy Labs Tvoe of Sanule Sample Taken elSe SaihUle Volume indicate if other ihali as specified belww Filtered circle Preservative Added circle VOCs Nutrients ri-3x4 nil lOOS tV Ha H2$04 Heavy Metals All Other Non- Radiologics fl3 250 11. 250 ml JI liMO3 No Preservative Added Gross Alpha 1000 ml 112504 fl Other specify Sample volume If preservative is used Specify Type and Quantity of Preservative /J\.flAt ILILkI rAcr tk-Ai-L4cr .iu-tAk .i1 s11h 1C4 Mtrr4 crctk ovt SlAflnt L.L.l-..t fs44. Comments An4uco nn roc4 .L njg tnncr InIItActA \JPzrntt L11..tY\O JI L-tm Mill Groundwater Discharge Permit Date 2.25.07 Revision Groundwater Mothtoring Quality Msurance Plan QAP Page 40 of AnACilMENT WJHUITE MESA URANIE1UM MILL FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event cn Li rotnk ki3iAcr.Tnnr Lumpier Location well name MSAi QS Name and initials_____________________ Date and Time for Purging iS -203 ct and Sampling if different__________________ Welt Purging Equip Useck S..pump or...jailer Well Pump if other than Bennet fl Sampling Eveut3rAA%afl\Crw4 AC Prey Well Sampled in Sampling Event i4W pHBufferl.O .1.ou pffBuffer4.O Specific Conductance 41 uMHOS/ctn Well Depth Depth to Water Before Purging 77 .5 Casing Volume Well 3z07 .653k Well .367k CondtttafneeVg C3o Well Water Temp avg .76 RŁ4ox Potætial $la Turbidity 2O Weather Cond Scvn Extl Mnb Temp.prior to sampling event tine dÆI.PurCI_______Tiiue JaLPurged Conductance______________________Conductance_________________________ pH pH Temperature Temperature____________________ Redox Potential Eli________________Redox Potential Eh___________________ Turbidity________________________Turbidity___________________________ Time Gal Purged________Time Gal Purged Conductance______________________Conductance________________________ pH______________________oH________________________ Temperature Temperature Redox Potential Eh_________________Redox Potential ____________________ 1. MillGroundwater Discharge Permit Date 11.17.06 Revision Groundwater Monitoring Quality AssurancePlan QAP Page4l of 41 ULUWL% Volume of Water Purged When Field Parameters are Measured fpjpg Rate Calculation Flow Rate in gpm Time to evacuate two casing vohmes 2V S160 _____________T2V/Q Number of casing volumes evacuated if other than two if well evacuated to dryness number of gallons evacuated q Name of Certified Analytical Laboratory if Other Than Energy Labs 7/ Iv of Sample Sauwle Taken IciSe Saæuile Volume Indicate if other ThMtiaS specified below Ailtered circle Preservative Added circle VOCs ts 3x40m1 Ha Y4 Nutrients lOOm H2$04 ifØavyMetals 250th NH MW3 tN All Other Non- Radiologics NJ 250 in No Preservative Added GrossAlpha tX L000ml it 113504 VL Other specify sample volume if preservative is used Specify Type and Quantity of Preservative Mill Groundwater Discharge Pennjt Groundwater Monitoring Quality Assurance Plan QAP ATTACHMENT ii WHIITE MESA URAMffJM MULL FEELD DATA WORKSFJEET FOR GIOUND WATER Description of Sampling Event Mon%4 \Ac ccvnpk tnA/.r Sampler Location well name M\t3 C$Name and initials tcr 14 Date and Time for Purging \-ZO -D.OO\and Sampling if different_________________ Well Purging Equip Userk Ipnmp or _bailer Well Pump if other than Bennet Sampling Event r.-owck tOiXci Prey Well Sampled in Sampling Event pHfluffer7.O 70 pHBuffer4.O Specific Conductance \I7 uMILOS/em Well DepthS Cd Depth to Water Before Purging 77Mg Casing Volume Well 3S .9 .65Th Well 36Th Condtttitnceavg 3c pHof Water vg 95 Well Water Temp avg kºdpx Potential Eh1O Turbidity Weather Cond Extl Auth Temp.prior to sampling event 7c- time Gal Purged________ Conductance_______________________ Tiflie Gal Conductance pg Temperature Redox Potthtial Eli Turbidity Purged pg ------- Temperature Redox Potential Eh_____________ Turbidity wb CACCc\ Temperature Redox Potential Eh___ pH Temper Rdox attire____________________________ otential Eli Date 2.25.07 Revision Page 40 of 41 Time Gal Purged________ Conductance____________________ flu Time___________Gal Purged Conductance___________________________ qjfl Groundwater Discharge Permit Date 1I.17fl6 Revision Groundwater Monitoring Quality Assurance Plan QAP TurbiditY Turbidity. Page 41 of 41 Volume of Water Purged When Field Parameters are Measured_ ggate Calculation Flow Rate in gpm Sf60 _____ Time to evacuate two cajjng volumes ZV T2V/Q 21 Number of casing volumes evacuated if other than two_ if well evacuated to dryness number of gallons evacuate Name of Certified Analytical Laboratoiy if Other Than Energy Lab Irof Sanwle Sample Taken circle Sanuile Vohune indicate if other thut as snecified below Filtered circle Preservative Added circle VOn Nutrients 3x4Onil lOOmI HCL H2O4 HØavyMetals All Other Non- Radiologics 250S 250 nil 11N03 No Preservative Added GrossAlpha Other specify 1000ml Sample volume if 112504 it preservative is used Specify Type and Quantity of Preservative Mill Groundwater Discharge Permit Groundwater Monitoring QuaWy Assurance Plan QAP AflACIBII\4IIENT 11 WHKTJE MESA IEJRANffUM MffLL FWLD DATA WORKSJBIIE1ET FOR GROUND WATJER Description of Sampling Event Vm flstCa..\1VL4t L1 Sampler Location well name flu Name and initials 44n pnC CC Date and Time for Purging 13 2ai17 and Sampling if different_________________ Well Purging Equip TJseck _pump or _bailer Well Pump if other than Bennet_________ Sampling Event filM Prey Well Sampled in Sampling Event______ pflBufferl.0 74 pHBuffertO .90 Specific Conductance qy uMflOS/cm Well DepthS fr Depth to Water Before Purging NIF Casing Volume Well__.653k Well .36Th Conduttance avg pH of Water vg Well Water Temp avg___________RØdoxPtºOtial _Turbidity Weather Cond Extl Amb Temp.prior to sampling event tme/4 fC dal.Purged fr 3. Conductance_____________ Tirne Gal Purged Conductance VR Temperature Redox Potential Rh Turbidity Temperature fr Redox Potential Rh LOft Turbidity Time Gal Purged Conductance___________________________ pH /114 Temperature Time GaL Purged Conductance____________________________ pH t4 Temperature Date 225.07 Revision Page4Oof4I ituui Eh________________Redox Potential Eh LA lWjllGroundwater Discharge Permit Date 11.17.06 Revision Groundwater Monitoring Quality AssurancePlan QAP Page 41 of 41 Turbidity ___Turbidity_____________________ Volume of Water Purged When Field Parameters are Measured___________________ gmplpg Rate Calculation Flow Rate in gpm Time to evacuate two casing volumes 2V 5/60 _______________T2V/Q Number of casing volumes evacuated if other than two If well evacuated to dryness number of gallons evacuated________ Name of Certified Analytical Laboratory if Other Than Energy Lab flp of Sample Sample Taken circle Samnie Volume indicate If other thÆtlas specified below Filtered circle Preservative Added circle VOCs 3x40an1 HCL Nutrients HŁavyMetals it lOOmI zsoS IO4 IMO3 All Other Non-250 ml No Preservative Added Radiologics Gross Alpha Other specify LOUD ml SamplS volume .. $1 1ST H2SO4 ha pthservative is used Specify Type anti Quantity of Preservative Commqitts 72k2/.Ot 14 otr tC/4vj Lz cte 7317/TcV ziw T-/U/r7 //7L 5c Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan QAP Date 2.2107 Revision Page 40 of 41 ATTACHMENT WHITE MESA URANiUM MILL FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event /AJqJ.it /4 S4tsyt4_ Sampler Location well name itfiW Name and initials tZiicr Date and Time for Purging 0/2 1I.Z57 and Sampling if different Well Purging Equip Useck or Well Pump if other than Bennet__ Sampling Event_____________________Prey Well Sampled in Sampling EvenLAQf pllBufferl.O 14 pflBuffer4.0 Specific Conductance ff7 uMHOS/cm Well Depth Depth to Water Before Purging Casing Volume Well .653h Well .367h Conductance avg pH Of Water avg. Well Water Temp avg Redox Potential Eli Turbidity Weather Cond.__________________Extl Amb Temp.prior to sampling event b.r Red otential Time Vi Gal Purged_________ Conductance casr Time GaL Purged ConductaN piu_4 S.2 pH_____________________ Temperature Temperatureh\Redox Potential 2/f Redox Po TurbidityTurbidity Time Gal Purgedctanc pH Mill GroundwaterDischarge Permit Date 11.17.06 Revision Groundwater Monitoring Quality Assurance Plan QAP Page 41 of 41 Turbidity Volume of Water Purged When Field Parameters are Measured_______________________ Pumpinn Rate Calculation flow Rate in gpm Time to evacuate two casing volumes 2V S160 ________________TZV/Q ____________________ Number of casing volumes evacuated if other than two_________ If well evacuated to dryness number of gallons evacuated________ Name of Certified Analytical Laboratory if Other Than Energy Labs Type of Sample Sample Taken circle Sample Volume indicate if other thai as specified below Filtered circle Preservative Added circle VOCs Nutrients HØavyMetals 3x40m1 lOOml 250m1 45 UCI H2SO4 lIMO3 a3 All Other Non-250 ml No Preservative Added Radiologics GmssAlpba 1009m1 112504 Other specify Sample volume If preservative is used Specilr Type and Quantity of Preservative Conun ts jrrst.i Si scAo/ rr 213e Y./.- S4rjl-4 j2z4e re Ia..flJn.rpseir 4C /6 bcz Mill Grotndwatflischaga Permit oundwater Monitoring OtiS ace Plan QAP RedoxPotentialHh VP u..rb Date 2.25.07 ReWsion Page4iPof4l ATTAC21MIINT WIBflfl MUESA D1ZAJJM IMUILL 1EL11D DATA WORS1RIIEET ma GIIOUND WATER DescripSn of Sampliig Event fik044h1 .rnL JAr .MrCI\ Sampler Location well name frWJ 14 1\1anºSd initinkiCnvtcr 1.4611 tLI Date and Time for Purging 3-20OI and Sampling if different Well Purging Equip lUse Lputhp or_hailer Well Pinup if other than Bonnet IT Sampling Event onBt foL4cr Prey Wlan1pS inSampling Event pHBuffer7.O to pufcrQ 4.0 Specific Conductance 447 uMUOS/cin WellDeptli Depth to WaterBefote Purging bc 11 Casing Volume Well 14 .653k Well .36Th Condnctænce avg 43M paoatztg CA Well WaterTemp avgJ4 .S Red oeiiØil Wi 114 turbidity Weather Cond Bxtl Auth Ten1P@itainphtflvent .. lane ClalPurged qg Tilpe gp GalPurged 13L CondØctauce 4094 Condutaice .903 .. 0.15 Tempest 14fl Temperature RedoxPoteittaIOh Ti Turbidity Time lioo Conductance Gal Purgect II.e 4030 p11 0N Temperature L93 -_________ Redox Potential Eli ii Turbidity Time 1430 GaLPurged Q37 Conductance qor ph tOM Temperature Redox Potential Eh_jfl jg-cgounrlwatesDischargePennit Date 11.17.06 RSsic1t Urcuadwater Mouitoriag QunliQy Assurance Plan QAJF Turbidity Volume of Water Purged pjpgRate Calculation Tnthhiitv .3M Page 41 of 41 Plow Rate in gpm S/60 ___ Time to evacuate two casing volumes 21/ T2V/Q 9k Mn Number of casing volumes evicuated if other than two_ If welL evacuated to dryness number ofgallozsevacateflt Name of Certified Analytical Laboratory if OthA-Than Energy Labs____ Thas dSS $nn EakS. frhtl4y fr SSjilaVolSe itii.othir Jknj4 fle Preservative Added ciSk Saia VOCs .VN acL YN Nutrients kkavyMetals Ct 100iul 2501111 yN YN All Oth Non Radiologics -y 250S ff N6PŁsvat1veAdded GrossAipha 1OO0mt Rz804 Otherspecify Samplvolume If preservative is used Spec1tr Type and Quantity of PtØservtive cnic3ta zy S.1ic SflO PtAe4 dian gg rESt j4C gw iggp B7 \j tAca4lisr Subi t3can t.y Comments Aa AitA4 an S4C L4L ltanr t4iLL1I ISX5CaTI ptr4g all1 Mill wuiwaflschae Pera C-rnundwfl Monitothig Quali4r Msigance Plan QA Date 2.25.07 Revisiot Page 40 of4I .4 AflAC1llZNT WffiIIITZ 4IIA 11J11L4I1\IIIIUM I%4IIILL IFLFAS DATA WO1SMIIET 1OR GHtOUND WATI Description of SaniplingEvent tL.JhL rr4 U2c.fer Mareit Sam Location well name Mu 2.C Naniæfidinitials_j ntrnei pateandTimeforPurging 3-18-aoo and Sampling if different Well Purging Equip TJseth or_bailer WdllPump if other than Bennet_________ Sampling Event ca a.St Prey.Well ampled in Sampling Event ww 3t pHBuflbr7.O 7.0 pflBuffer4.O Specific Conductance l7 uMflOSIcm WqllDepth Depth to Water Before Pigging._.__.__Casing Volume Well .653h Well .36Th Conductance afrg 3S pfl4fWafer ayg en Well WaterTemp avg IS RcdmPote1ifiIEh I4Twbiditjr Weather COurt EXt Miib TØrnp.tiQtEoSaiEplidgeVOnt Tune no ml Pined____Tithe Gal Purged COn4I1CiaILCC \5C Cnductauce .... pH Temperature JO Temperature Redox PotentEh Redo7dal Eli_____________ Turbidity yullIditY Time Gal Purged Conductance____________________ PH Temscrature__________________ -V Redox Potential Eli Time Gal.-Purget7 Conductance pH Tempera .AtPotential Eli Mill -Groundwater Discharge Permit Date 11.17.06 Itevisiot undwaterMcnitoriug Qtwliuy Assareace Plan QAP UWJUAJ Turbidity Volume of Water Purged When Field Parameters are MeasuS_ PllmPiW Rate Calculation Page 41 of PlowRateQ ingpa 5/60 _____.33 Time to evacuate two casing volumes 2W T2VIQ Number of casing volumes evacuated if other than two_ If well evacuated to dryness number of gallons evacuatet Name of Certified Analytical Laboratory if Other ThanEn gy Labs_ 7MSamSA ggØ Taken ckcle S4ieVehuue SlÆSitofttº j.IsuecWedSo Filtered ckcle Preservative Added circle VOCs xY 3401i0 act fl Nutrients EŁavyMetals Jt.N WOnd 2QSL Ct if$O YN lThS All Other Non- Radloingics 250w NoPresŁrvAtiveAdded OrossAipha L0O0ml n2s04 YN Other specify Sampl volume If preservative is used Specify Type and Quantity of Preservative A-not rC lLii.L nt.tOl 1t Sn.fll44YOnmment4.....iTzT 1Q1 ii Pp.tcirtcArrs s4c a.4-jg c.kn DO ia-r tC\ctc jrga xAJLY Scwj tAbltY yj c46AS Mill-Groundwater Discharge Permit Date 2.25.07 Revision Groundwater Monitorhig Quality Assurance Plan QAP page 40 of 41 AJITACJB1MFNT 11 WIRIIITIE MESA URANWM MItRAL FflD DATA WOIIItKSJBIIEET FOR GROUIkID WATER Description of Sampling Event MhL1 roua4 \tk4tr bLrck Sampler Location well name frt\32 Name and initials liner It iclc.q Well Purging Equip Useck Lpuznp or_bailer Wolf Pump if other than Beanet Sampling Event rou.sJ4itr Prey Well Sampled in Sampling Event Al/A. pHBuffrr7.O 1.0 pHBuffer4.0 L1.C Specific Conductance qq uMHOSIctn WellDepth 13 .F Depth to Water Before Purging 77 Casing Volume Well c4..653h WelJ .367k Conductance avg4i pH ofWater avg CFI Well Water Temp avg Redox Potential Eli J45 Turbidity JI 7L WeAther Cond c.nn Eictl Amb Temp4prior to sampling event iime csk Gal Purget ic Tiis 112S. Cofldllctapce 4j4 Conducnce 41 pH pH Temperature t5.I Temperature jL4 18 Redox Potential Rh 41 Redox Potential Eli 17I3 Turbidity t.5 Turbidity 203 Time aOS GaL Purged .K Time fl2 Gal.Purged 37.%S Conductance it 23 Conductance 4119 pH 1.L1C.Lsc Temperature 44 Temperature 14.4 Redox Potential Eli VIS Redox Potential Bk 41 irb ________ Mill Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plati QAP Date 11.17.06 Revision Tukbidity_____ Page4l of4l Volume of Water Pumping Rate Calculation PlowRateQingpliL 5/60 .33 Time to evacuate two casing volumes 2V T2V1Q 21S Mi Number of casing volumes evacuated if other tl If well evacuated to dtyness number of gallons evacuate LI blame of Certified Analytical LaboEoiaOther Than Energy Labs TvneJPSa1lIPlC $umnls Taken ciSc Sinuile Vohanne indicate it Other iliaiiaispecified belol Filtered cle Preservative Added circle VOCs 340i11l .-aCE YN Nutrients loOmi 112504 RÆavyMÆtals All Other Non- Radiologics tN 250kb. 250rn1 VN RHO3 jN NoPreservativeAdded ossAipha 1000ml it H2S4 CYi Other specify SampIS volume If preservative is used Specify Type and Quantity of Preservative a3 k4-1r3n Mpltc L44L \Acp4Itsr S.snn jostn her 4tfl4 9rqe dt.11 flkrn a-U52 Ua aa hrn clp.4 4rJa 119 tA4 %ry Comments Acryp .AFca4 oil Slit LO ltaaer UnlluLu crtscal C-ptAr4 aJ Mill-Groundwater Discharge PanS Groundwater Monitoring Quality Assurance Plan QAP Date 2.25.07 Jevision Page 40 of 41 Time Gal..Purged Conducc_________________ MTACE%IIIENTI WILHJTIfJE PAIISA ILJRANIRJM Jt4UILL IFIJELD DATA WOWLSJBIIEZT FOR GROU1IIII WAT1E Description of Sampling Event March M0fkl roanA uZk $amplerO Location well name MW GO Nain ad initials_Jnncr- I4oiI4Lj si Date and Time forPurging 5--aoocj and Sampling if different Well Purging Equip Useth or_bailer Well Pump if other than Bennet Sampling Bvent_JnllJ oanA iA4t Prey Well Sampled in Sampling Event /4 pLfluffer7.O tO pflBuffer4.O .g.O Specific Conductance 441 uMMOSIcm Well Depth wit Depth toWaterBeforePurging tW4 Casing VolumeV Well .653h 3fl Well .36111 Conductance avg pH of Water avg Well Water Temp avg IC1 3S Rj1JthC 311 Turbidity Weather Cond.________________BxtI Amb Tdmp4pflprto sampliOg event Time sL.L LPurged_________Time Gal Purged Conctuciaace f314 ..t Conductance $1 741 pH. Temperature IL1S Temperature_____________ Redox PotentialEh P7 Redo7tial Eh_____________ Turbidity_________________ivÆidity___________________ Time Gal Purged Conductance nH Temerat/l -RSetential Ehi Mill Groundwater Discharge Permit Date IL 17.06 Revisiorn Groundwater Monitoring Quality Assurance Plan QAP flirhidiiv Page4l of4l Volume of Water Purged When Field Parameters are Measured pinz Rate Calculation Plow Rate in wm 5160 _____ Time to evacuate two casing volumes 2V T2V/Q N/4 Number of casing volumes evacuated if other than two_ if welt evacuated to dryness number of gallons evacute Name of Certified Analytical Laboratoiyif Other Than Energy Labs il/4 y of Sainsile Sanmie Taken circle SamileVohune indicate if other tliÆaispeclfled bŁlw Filtered Icircie Preservative Added circle VOCs Sx4Oml RCL eN Nutrients 100w 112$04 YN HØavyUetals .N 250th1 lIMO3 .. All Other Non- Radiologics 250ml NPthservativeAdded GrossAlpha 1000mI 112504 Other specify Sample volume preservative is used Specify Type and Quantity of Preservative rnmment Airt.aai tabi Of in Stl 0F oarcimc4t SsmpksHTckts oif as 1J1 lak p4 ptiS Mill -Gun tatcrDischarge Permit Date 2.25.07 Revision Groundwater Mouitoring Quality Assurance Plan QAP Page 40 of 41 AT1rACH4IIENT 11 Wmn MISA URANffffIM Mll PIIELD DATA WORKSEIIEET FOR GROUND WAThR Description of Sampling Event M0fl ir ray4 i44 Mrch Sampler Location well name ML Name and initials i4 h0j Date and Time forPurging 3-I8 ooCt and Sampling if different_______________ Well Purging Equip Uset Apump or 174ff Pump lather than Rennet Qf fl SaniplingEvenLhLrA ttr.tJct4tc Prev.Well Sampled in Sampling Event ifl pflBuffer7.O 7.0 pHBuffer4.O La Specific Conductance gi uMHOS/cm Well Depth 13 .5 Depth to Water Before Purging 77 Casing Volume Well 11 .653h Well 367k Conductance avg 9134 pH of Water avg__________________ WellWaterTemp.avg 14 .SC kPotthiiS IC Turbidity ll.7-I Weather Cond Euctl Amb Tenip.prior to sampling event Tune OLPurged______Til7-Gal.FUrged Conductance______________________Conductance p0 Temperature Temperature Redox Potential Eli____________Redox Potential Eli______________ Turbidity__________________ Turbidity____________________ Time Gal Purged_______Time Gal Purged Conductance______________________Conductance_________________________ pp Temperature Temperature Redox Potential Eh______________Redox Potential Eh 0F Mill GroundwaterDiscbargePemæt Date 11.17.06 Revision Groundwater Monitoring Quality Msuraace Plan QAP Tuthidity Turbidity Volume of Water Purged When Field Parameters are Measured Ptirnpip Rate Calculation Page4l o141 Flow Rate 03 in gpm 5160 _____en Time to evacuate two casing volumes 2V T2V/Q 2s Number of casing volumes evacuated if other tha two_ If well evacuated to dryness number of gallons evacuatcl_ L2 Name of Certified Analytical Laboratory if Other Than Energy Labtj jype of Samnle Sanmie Taken circle SSthle Volume iædicatelfothØi thaf iS specified beloª Filtered circle Preservative Added 4rcle VOCs YN 3x40m1 Ha YN Nutrients IºavyMetals bOwl 2SOkhf H2$O4 YN 1Th103 All Other Non-250m1 NoPreservative Added Radiologics GrossMpha fl5 b000mI .. 112S04 Other specify Sampl volume If pmservative is used Specify Type and Quantity of PServative ENERGYLABORA TORIES INC 2393 Ball Creek Hihway 8260 AC Box 3258 Caspei WY82602 Toll Free 888.235.0515 307235.0515 Far 307234.1639 caspeitenergyla/z corn wwwenergylab.cornEIERGY LABOR/i TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Collection Date 01/20/09 1119 Lab ID C0901 0761-001 DateReceived 01122/09 Client Sample ID MW-I Matrix Aqueous MCL Analyses Result Units Qualifier RL QCL Method Analysis Date By METALS DISSOLVED Manganese 2060 ugL 10 E200.8 012909 0008 ts Uranium 68.9 ugL 0.30 E200.8 012909 0008 ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERG YLASORA TORIES INC 2393 Sail Creek /-/qhway 82601 P0 Sax 3258 Caspec WY82602 Tall Free 888.2350515 307235 0515 It 307234.1639 casperenergy/ab.cam wwenergylab.con7 LABORATORY ANALYTICAL REPORT Report Date 02/11/09 Collection Date 01/20/09 1147 DateReceived 01/22/09 Matrix Aqueous ENERGY LA//ORAl FOR/Es Client Project Lab ID Client Sample ID MW-26 VOLATILE ORGANIC COMPOUNDS Report RL Analyte reporting limit Definitions QCL Quality control limit MCL Maximum contaminant level ND Not detected at the reporting limit Denison Mines USA Corp January Groundwater Re-Sample C09010761-002 METALS DISSOLVED MCL/ Analyses Result Units Qualifier RL QCL Method Analysis Date By Manganese 1040 ug/L 10 E200.8 01/29/09 0015 ts Uranium 52.6 ug/L 0.30 E200.8 01/29/09 0015 ts Acetone ND ug/L 40 SW8260B 01/27/09 0605 /wen Benzene ND ug/L 2.0 SW8260B 01/27/09 0605/wen Carbon tetrachloride ND ug/L 2.0 SW8260B 01/27/09 0605 wen Chloroform 1200 ug/L 200 SW8260B 01/27/09 0448 wen Chioromethane ND ug/L 2.0 SW8260B 01/27/09 0605 wen Methyl ethyl ketone ND ug/L 40 SW8260B 01/27/09 0605 wen Methylene chloride 69 ug/L 2.0 SW8260B 1/27/09 0605 wen Naphthalene ND ug/L 2.0 5W8260B 01/27/09 0605 wen Toluene ND ug/L 2.0 SW8260B 1/27/09 0605 wen Xylenes Total ND ug/L 2.0 SW82608 01/27/09 0605 wen Surr 2-Dichlorobenzene-d4 104 %REC 80-120 SW8260B 01/27/09 0605 wen Surr Dibromofluoromethane 119 %REC 70-130 SW8260B 01/27/09 0605 wen Surr p-Bromofluorobenzene 107 %REC 80-120 SW82608 01/27/09 0605 wen Surr Toluene-d8 100 %REC 80-120 8W8260B 01/27/09 0605 wen MDC Minimum detectable concentration ENERGYLABORA TORIES INC 2393 Sail CreekHihway 82601 P0 Sex 3258 Caspei WY82602 re/I ftee 886235.0515 307235.0515 Fax 307234.1639 caaperilenargylab.com wwwenergy/a/zcda7 LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 02/11/09 January Groundwater Re-Sample Collection Date 01/20/09 1433 C0901 0761-003 DateReceived 01/22109 MW-32 Matrix Aqueous Client Project Lab ID Client Sample ID MCL Analyses Result Units Qualifier RL QCL Method Analysis Date By METALS DISSOLVED Cadmium 2.64 ugL 0.50 E200.8 01/27/09 1641 ts Iron 9130 ugL 30 E200.7 02/05/09 1713 rdw Manganese 4850 ugL 10 E200.8 01/27/09 1641 /15 Nickel 58 ugL 20 E200.8 01/27/09 164 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 5.2 pCi/L E900.1 01/31/09 1400 cgr Gross Alpha minus Rn Precision 1.0 pCiL E900.1 01/31/09 1400 cgr Gross Alpha minus Rn MDC 0.8 pCiL E900.1 01/31/09 1400 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration EIERGY LABORA TORIES ENERO YLASORA TORIES INC P2393 Sail Creek Hiqhway 82601 P0 Box 3258 Caspei WY82602 Toil Free 888235.0515 307235 0515 Fax 307234.1639 casperenergy/ab.com wwwenergylab.cotn LABORA JURIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Collection Date 01/21/09 0745 Lab ID C09010761-004 DateReceived 01/22/09 Client Sample ID MW-60 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By METALS DISSOLVED Cadmium ND ug/L 0.50 E200.8 01/27/09 1715/ts Iron ND ug/L 30 E200.7 02/05/09 1717 rdw Manganese ND ug/L 10 E200.8 01/27/09 1715 /ts Nickel ND ug/L 20 E200.8 01/27/09 1715/ts Uranium ND ug/L 0.30 E200.8 01/27/09 1715/ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 0.2 pCi/L E900.1 01/31/09 1400 cgr Gross Alpha minus Rn Precision 0.5 pCi/L E900.1 01/31/09 1400 cgr Gross Alpha minus Rn MDC 0.8 pCi/L E900.1 01/31/09 1400 cgr VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 01/27/09 0527 wen Benzene ND ug/L 1.0 SW8260B 1/27/09 0527 wen Carbon tetrachioride ND ug/L 1.0 SW82609 1/27/09 0527 wen Chloroform ND ug/L 1.0 SW8260B 01/27/09 0527 wen Chioromethane ND ug/L 1.0 SW8260B 01/27/09 0527 wen Methyl ethyl ketone ND ug/L 20 SW8260B 01/27/09 0527 wen Methylene chloride ND ug/L 1.0 SW8260B 01/27/09 0527 wen Naphthalene ND ug/L 1.0 SW8260B 01/27/09 0527 wen Toluene ND ug/L 1.0 SW8260B 01/27/09 0527/wen Xylenes Total ND ug/L 1.0 SW8260B 01/27/09 0527 wen Surr 12-Dichlorobenzene-d4 106 %REC 80-120 SW8260B 01/27/090527/wen Surr Dibromofluoromethane 122 %REC 70-130 SW8260B 01/27/09 0527 wen Surr p-Bromofluorobenzene 109 %REC 80-1 20 SW8260B 01/27/09 0527 wen Surr Toluene-d8 99.0 %REC 80-120 SW8260B 01/27/09 0527/wen Report RL-Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration Not detected at minimum detectable concentration ENERGYLASORA TORIES INC -2393 Salt Creek Hibway 8260/-PC Box 3258 Caspei WY82602 ____________Toll Free 888.235.0515 307.235.0515 Fax 307.234.1639 caspeitenergylab.com wwwenergylab.coni LABOR/i TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Collection Date 01/20/09 1433 Lab ID C09010761-005 DateReceived 01/22/09 Client Sample ID MW-65 Matrix Aqueous MCL Analyses Result units Qualifier RL QCL Method Analysis Date By METALS DISSOLVED Cadmium 2.79 ugL 0.50 E200.8 O12709 1722 ts Iron 8660 ugL 30 E200.7 02/0509 1738 rdw Manganese 4870 ugL 10 E200.8 O12709 1722 ts Nickel 62 ug/L 20 E200.8 01/27/09 1722 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 5.2 pCiL E900.1 O1/3109 1400 cgr Gross Alpha minus Rn Precision 1.0 pCi/L E900.1 0131/09 1400 cgr Gross Alpha minus Rn MDC 0.8 pCiL E900.1 0131/09 1400 cgr Report RL Analyte reporting limit MCL- Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERO YLABORA TORIES INC 2393 Sail Creek Hiq/zway 82601 P0 Sex 3258 Casper WY82602 Tel Free 885235.0515 3072350515 Far 307234.1639 casperOenergylab.cem wwwenergy/ab.carn LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Collection Date 01/21/09 0745 Lab ID C09010761-006 DateReceived 01/22/09 Client Sample ID Trip Blank Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 01/24/09 0209/wen Benzene ND ugL 1.0 SW8260B 01/24/09 0209 wen Carbon tetrachioride ND ugL 1.0 SW8260B 01/24/09 0209 wen Chloroform ND ug/L 1.0 SW8260B 01/24/09 0209 wen Chioromethane ND ugL 1.0 SW82608 01/24/09 0209 wen Methyl ethyl ketone ND ug/L 20 SW8260B 1/24/09 0209 wen Methylene chloride ND ugL 1.0 SW6260B 01/24/09 0209 wen Naphthalene ND ugL 1.0 SW8260B 01/24/09 0209 wen Toluene ND ug/L 1.0 SW82608 01/24/09 0209 wen Xylenes Total ND ugL 1.0 SW8260B 1/24/09 0209 wen Surr 12-Dichlorobenzene-d4 105 %REC 80-120 SW8260B 01/24/09 0209/wen Surr Dibromofluoromethane 116 %REC 70-130 SW8260B 01/24/09 0209 wen Surr p-Bromofluorobenzene 103 %REC 80-1 20 SW8260B 01/24/090209 wen Surr Toluene-d8 99.0 %REC 80-1 20 SW82609 01/24/09 0209 wen -Trip Blank reported without appropriate DC Re.analysis not possible due to limited sample volume Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGY LABO/A TOP/ES ENERO YLABORA TORIES INC 2393 Sail CreekHibway 8250 P0 Sax 3258 Caspei WY82602J7TallFree888235.0515 3072350515 Far 307234.1539 casperenergy/ab.cam www.energylab.com LA/3ORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 02111109 Project January Groundwater Re-Sample Collection Date Not Provided Lab ID C09010761-007 DateReceived 01/22/09 Client Sample ID Temp Blank Matrix Aqueous MCLI Analyses Result Units Qualifier RL QCL Method Analysis Date By PHYSICAL PROPERTIES Temperature 2.0 E170.1 01122/090915 kbh Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENSRGY L/113ORA TORIES ENERO YLA DORA TORIES INC 2393 Sail Creak Hhway 82501 RO Box 3258 Caspa WY82602 To//Free 888.235.0515 3072350515 Fax 307234.1639 caspetenergy/ab.com .vww.anergylab.com ANALYTICAL SUMMARY REPORT February 112009 Denison Mines USA Corp 6425 Hwy 191 Blanding UT 84511 Workorder No C09010761 Quote ID C1640 POC Wells Monthly Groundwater Sampling Project Name January Groundwater Re-Sample Energy Laboratories Inc received the fo llowing samples for Denison Mm es USA Co rp on 1/22/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09010761-001 MW-14 01/20/09 1119 01/22/09 Aqueous Metals by ICP/ICPMS Dissolved C09010761-002 MW-26 01/20/09 1147 01/22/09 Aqueous Metals by ICP/ICPMS Dissolved 5W8260B VOCs Standard List C09010761-003 MW-32 01/20/09 1433 01/22/09 Aqueous Metals by ICP/ICPMS Dissolved Gross Alpha minus Rn222 and Uranium C09010761-004 MW-60 01/21/09 0745 01/22/09 Aqueous Metals by ICP/ICPMS Dissolved Gross Alpha minus Rn222 and Uranium 5W8260B VOCs Standard List C09010761-005 MW-65 01/20/09 1433 01/22/09 Aqueous Metals by ICP/ICPMS Dissolved Gross Alpha minus Rn222 and Uranium C09010761-006 Trip Blank 01/21/09 0745 01/22/09 Aqueous SW8260B VOCs Standard List C09010761-007 Temp Blank 01/22/09 Aqueous Temperature As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QNQC Summary Report or the Case Narrative If you have any questions regarding these tests results please call ReportApprovedBy cI4taJCL ENERO YLABORA TORIES INC 2393 Sail Creek Hi/iway 82501 P0 Sax 3258 Caspec WV82602 ____________Tall Free 888.235 0515 307235.0515 Pa 307234.1639 caspenWenergy/ab.cam www.energylab.com LABORA TORIES UA/UU summary eport Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Work Order C0901 0761 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.7 Batch Ri 14362 Sample ID Iron LRB Method Blank 0.006 mg/L 0.0004 Run ICP3-C_090205A 02/05/09 1203 Sample ID Iron LFB-ICP Laboratory Fortified Blank 2.49 mg/L 0.030 100 Run ICP3-C_090205A 85 115 02/05/09 1209 Sample ID Iron C09010758-OOICMS Sample Matrix Spike 0.60 mg/L 0.030 107 Run ICP3-C_090205A 70 130 02/05/09 1704 Sample ID Iron C09010758-OO1CMSD Sample Matrix Spike Duplicate 0.60 mg/L 0.030 107 Run ICP3-C_090205A 70 130 0.3 02105/09 1708 20 Method E200.8 Batch Ri 13903 Sample ID LRB Method Blank Run ICPMS2-C_090127A 01/27/09 1250 Cadmium ND mg/L E-05 Manganese ND mg/L SE-OS Nickel ND mg/L 0.0007 Uranium ND mg/L 1E-05 Sample ID LFB Laboratory Fortified Blank Run ICPMS2-C_090127A 01/27109 1256 Cadmium 0.0480 mg/L 0.0010 96 85 115 Manganese 0.0484 mg/L 0.0010 97 85 115 Nickel 0.0481 mg/L 0.0010 96 85 115 Uranium 0.0471 mg/L 0.00030 94 85 115 Sample ID C09010761-OO5AMS4 Sample Matrix Spike Run ICPMS2-C_090127A 01127/09 1728 Cadmium 0.0514 mg/L 0.010 97 70 130 Manganese 4.85 mg/L 0.010 70 130 Nickel 0.109 mg/L 0.050 93 70 130 Uranium 0.0574 mgIL 0.00030 110 70 130 Sample ID C09010761-OO5AMSD4 Sample Matrix Spike Duplicate Run ICPMS2-C_090127A 01/27/09 1735 Cadmium 0.0524 mg/L 0.010 99 70 130 1.8 20 Manganese 4.83 mg/L 0.010 70 130 0.2 20 Nickel 0.111 mg/L 0.050 98 70 130 2.4 20 Uranium 0.0600 mg/L 0.00030 115 70 130 4.5 20 Qualifiers RL Analyte reporting limit The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated ND Not detected at the reporting limit ENERG YLAHORA TORIES INC 2393 Sail Creek Hibway 82501 PO Box 3258 Casper WY82602 ____________Toil Free 888.235.0515 307235 0515 Fax 307.234.1539 casperenergy/ab.com www.energylab.com LABORA TORIES QA/UG summary Report Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Work Order C09010761 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Batch Ri 13977 Sample ID LRB Manganese Uranium Method Blank ND mg/L ND mg/L SE-OS 8E-06 Run ICPMS2-C_090128A 01/28/09 1410 Sample ID LFB Manganese Uranium Laboratory Fortified Blank 0.0524 mg/L 0.0515 mg/L 0.0010 0.00030 105 103 Run ICPMS2-C_090128A 85 115 85 115 01/28/09 1417 Sample ID C09010833-OO6BMS4 Manganese Uranium Sample Matrix Spike 0.852 mg/L 4.09 mg/L 0.010 0.00030 85 222 Run ICPMS2-C_090128A 70 130 70 130 01/29/09 0250 Sample ID C09010833-OO6BMSD4 Manganese Uranium Sample Matrix Spike Duplicate 0.850 mg/L 4.03 mg/L 0.010 0.00030 85 215 Run ICPMS2-C_090128A 70 130 0.3 70 130 1.6 01/29/09 0256 20 20 Method E900.1 Batch GA-0205 Sample ID MB-GA-0205 Gross Alpha minus Rn Gross Alpha minus Rn Precision Gross Alpha minus Rn MDC Method Blank -0.1 pCi/L 0.4 pCi/L 0.8 pCi/L Run BERTHOLD 770-2_090129A 01/31/09 1400 Sample ID LCS-GA-0205 Gross Alpha minus Rn Laboratory Control Sample 23.1 pCi/L 88 Run BERTHOLD 770-2_090129A 70 130 01/31/09 1400 Sample ID TAP WATER-MS Gross Alpha minus Rn Sample Matrix Spike 23.2 pCi/L 84 Run BERTHOLD 770-2_090129A 70 130 01/31/09 1759 Sample ID TAP WATER-MSD Gross Alpha minus Rn Sample Matrix Spike Duplicate 23.4 pCi/L 85 Run BERTHOLD 770-2_090129A 70 130 0.8 01/31/09 1759 27.1 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit Spike recovery outside of advisory limits Not detected at minimum detectable concentration ENERG YLABORA TORIES INC 2393 Sail Creek Hiqbway 82601 Pa Box 3258 Caspei WV82602 ____________Toll Free 888.235 0515 307235 0515 Fax 307234.1639 casperenergy/ab.corn www energy/sb corn LABORA TORIES Client Denison Mines USA Corp Project January Groundwater Re-Sample UAIWU summary eport Report Date 02/11/09 Work Order C09010761 Analyte Result Units RL %REC Low Limit High Limit RPD RPOLimit Qual Method SWOZ6OB Batch Ri 13883 Sample ID 26-JAN-09_LCS_3 Acetone Benzene Carbon tetrachloride Chloroform Chloromethane mp-Xylenes Methyl ethyl ketone Methylene chloride Naphthalene o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Sum Toluene-d8 Sample ID 26-JAN-09_MBLK_6 Acetone Benzene Carbon tetrachloride Chloroform Chloromethane mp-Xylenes Methyl ethyl ketone Methylene chloride Naphthalene o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 Laboratory Control Sample Duplicate 110 ug/L 9.0 ug/L 9.6 ug/L 9.9 ug/L 12 ug/L 18 ug/L 120 ug/L 11 ug/L 10.0 ug/L 9.3 ug/L 8.9 ug/L 27 ug/L 20 108 1.0 90 1.0 96 1.0 99 1.0 117 1.0 91 20 125 1.0 106 1.0 100 1.0 93 1.0 89 1.0 91 1.0 102 1.0 108 1.0 102 1.0 102 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 102 1.0 102 1.0 103 1.0 100 70 130 70 130 65 135 70 130 70 130 70 130 70 130 70 130 70 130 70 130 80 120 70 130 80 130 80 120 80 120 70 130 80 120 80 120 Run GCMS2_090126B 20 88 70 130 20 93 70 130 20 99 70 130 20 84 70 130 20 89 70 130 20 80 70 130 20 86 70 130 Run GCMS2_090126B 70 130 70 130 Run GCMS2_0901 268 01/26/09 1237 01/26/09 1640 01/26/09 2145 Method Blank ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L Sample Matrix Spike 180 ugIL 190 ug/L 200 ug/L 170 ug/L 180 ug/L 160 ug/L 340 ug/L Sample ID C09010643-OOIGMS Benzene Carbon tetrachloride Chloroform mp-Xylenes o-Xylene Toluene Xylenes Total Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit ENERGVLI4 DORA TORIES INC 2393 Sail Creek H.fqbway 82601 P0 Box 3258 Caspec WY82602 ____________Toil Free 889235.0515 307235 0515 Fax 307234.1539 casperilenergy/ab.com wwwenergy/ab.corn LASORA TORIES UAIUC summary Report Client Denison Mines USA Corp Report Date 02/11/09 Project January Groundwater Re-Sample Work Order C09010761 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Dual Method SW8260B Batch Ri 13883 Sample ID C09010643-OOIGMS Sample Matrix Spike Run GCMS2_090126B 01/26/09 2145 Surr 12-Dichlorobenzene-d4 20 104 80 120 Surr Dibromofluoromethane 20 113 70 130 Surr p-Bromofluorobenzene 20 104 80 120 Surr Toluene-d8 20 102 80 120 Sample ID C09010643-OOIGMSD Sample Matrix Spike Duplicate Run GCMS2_090126B 01/26/09 2223 Benzene 180 ug/L 20 92 70 130 4.4 20 Carbon tetrachloride 190 ug/L 20 96 70 130 20 Chloroform 200 ugIL 20 100 70 130 1.2 20 mp-Xylenes 180 ug/L 20 90 70 130 6.9 20 o-Xylene 190 ug/L 20 96 70 130 7.8 20 Toluene 170 ug/L 20 86 70 130 6.7 20 Xylenes Total 370 ug/L 20 93 70 130 7.4 20 Surr 12-Dichlorobenzene-d4 20 102 80 120 10 Surr Dibromofluoromethane 20 109 70 130 10 Surr p-Bromofluorobenzene 20 103 80 120 10 Surr Toluene-d8 20 99 80 120 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d PL E A S E PR I N T - Pr o v i d e as mu c h in f o r m a t i o n as oo s s i b l e Co m p a n y Na m e Pr o j e c t Na m e PW S Pe r m i t Et c 1J a m P l e Or i g i n EP A / S t a t e Co m p l i a n c e jt Y S p A rV i tv o c t n e tL k r ta t e Ye s IW No Re p o r t Ma i l Ad d r e s s Co n t a c t Na m e j Ph o n e / F a x Em a i l Sa m p l e r Pl e a s e Pr i n t 11 12 ds t _ 4n - n z g1 1 1 4 /r n n c 4 _ u In v o i c e Ad s s vc e Co n t a c t Ph o n e Pu r c h a s e Or d e r Qu o t e / B o t t l e Or d e r Li z - 22 / Sp e c i a l R e p o r t / F o r m a t s EL I mu s t be no t i f i e d Co n t a c t EL I pr i o r to by pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g RU S H sa m p l e su b m i t t a l fo r ch a r g e s an d co sc h e d u l i n g S e e In s t r u c t i o n Pa g e RW Iv tT e m p Do w DA 2 L A GS A ED D / E O T E l e c t r o n i c Da t a Co m m e n t s hi tl CO WI _ _ c o o DP O T W / W W T P Fo r m a t No DS t a t e DL E V E L I V i cu s t o d y se a l WE 0k A co o I e r In t a c t YN DO t h e r DN E L A C co i 32 . - Bo t t l e s SA M P L E ID E N T I F I C A T I O N Co l l e c t i o n C o l l e c t i o n Sig n a t u r e MA T R I X Na m e Lo c a t i o n In t e r v a l et c Da t e Ti m e Ma t c h Iz o Il l I- .z o U t ii q q- 1- f l O l /. z o f l is -i /2 o O I- w $x K _ _ _ _ _ Ta ov 4 - __ _ _ _ _ 10 us t o d v uis h e d by pi1 f l Da t e / T i m e pr i n t ua T i T h Si g n a t u Re c o r d ate I T i m e MU S T be Slg n a t u Re c e i v e d by pn n t Da t me Slg % a t u r e Si g n e d Sa m p l e Dis p o s a l Re t u r n to Cli e n t La b Dis p o s a l Re c e i v e d b y La b o r a t o r y Da t e / T i m e Sig n a t u r e In ce r t a i n ci r c u m s t a n c e s sa m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s In c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to cc m p l e t e th e an a l y s i s re q u e s t e d Th i s se r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n t r a c t d a t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l r e p o r t Vis i t ou r we b si t e at ww w . e n e r g y l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s Et E R G Y AI c / A 1/ I / E s Pa g e j of __ _ Energy Laboratories Inc Workorder Receipt Checklist Denison Mines USA Corp Login completed by Kimberly Humiston Reviewed by Reviewed Date Shipping container/cooler in good condition custody seals intact on shipping container/cooler Custody seals intact on sample bottles Chain of custody present Chain of custody signed when relinquished and received Chain of custody agrees with sample labels Samples in proper container/bottle Sample containers intact Sufficient sample volume for indicated test All samples received within holding time Container/Temp Blank temperature Water VOA vials have zero headspace Water p1-I acceptable upon receipt Contact and Corrective Action Comments None C0901 0761 Date and Time Received 1/22/2009 915 AM Received by pb Carrier name Next Day Air Not Present Not Present Not Present 121 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 2C On Ice Yes Yes NoD NOD NOD NOD No NOD NOD NOD NOD NOD NOD NOD No VOA vials submitted Not Applicable ENERGYLABORA TORIES INC 2393 Sail Creek Hibway 82601 R2 Box 3258 Caspec WY82602 To//Free 888.235.0515 307.235 0515 Fax 307234.1639 casperenergy/ab.ooin www.energylab.com LARORA TORIES CLIENT Denison Mines USA Corp Date 11-Feb-09 Project January Groundwater Re-Sample CASE NARRATIVE Sample Delivery Group C09010761 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 02118CA Oregon WY200001 Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energyIab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT ENERG YLABORA TORIES INC 2393 Salt Creek Highway 82601 RO Box 3258 Casper WY82602 roll Free 888.235 0515 307235.0515 Fax 307234.1639 caspercenergylaA corn wwwenergy/ab.corn LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March CollectIon Date 03/18/09 1441 Lab ID C09030659-001 DateRecelved 03/20/09 Client Sample ID MW 14 Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Manganese 2150 ug/L 10 E200.8 03/26/09 0735 sml Uranium 57.4 ug/L 0.3 E200.8 03/26/09 0735 sml Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit NO Not detected at the reporting limit ENERGY LASORA TORIES ENERGY LABORA TORIES Client Project Lab ID Client Sample ID ENERGVLAHORA TORIES INC 2393 Sail Creek Hlqbway 82601 RO Box 3258 Caspei WY82602 Tall Free 888.235 0515 307235.0515 Fax 3072341639 casperenergy/aLi.corn www.energyla corn LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 04/06/09 Monthly Groundwater March Collection Date 03/18/09 1109 C09030659-002 DateReceived 03/20/09 MW 26 MatrIx Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Manganese 1600 ug/L 10 E200.8 03/26/09 0742 sml Uranium 58.3 ug/L 0.3 E200.8 03/26/09 0742 sml VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 03/27/09 1736 jir Benzene ND ug/L 1.0 SW8260B 03/27/09 1736 jir Carbon tetrachloride ND ug/L 1.0 SW8260B 03/27/09 1736/jIr Chloroform 1200 ug/L 200 SW8260B 03/27/09 1700 jir Chloromethane ND ug/L 1.0 SW8260B 03/27/09 1736 jir Methyl ethyl ketone ND ugJL 20 SW82608 03/27/09 1736 /jlr Methylene chloride 37 ug/L 1.0 SW82608 03/27/09 1736 jir Naphthalene ND ug/L 1.0 SW82608 03/27/09 1736 jlr Toluene ND ug/L 1.0 SW8260B 03/27/09 1736/jlr Xylenes Total ND ug/L 1.0 SW8260B 03/27/09 1736 jlr Surr 2-Dichlorobenzene-d4 118 %REC 80-120 SW8260B 03/27/09 1736 jir Surr Dibromofluoromethane 120 %REC 70-130 SWB26OB 03/27/09 1736 jIr Surr p-Bromofluorobenzene 90.0 %REC 80-120 SW8260B 03/27/09 1736/jlr Surr Toluene-d8 103 %REC 80-120 SW82608 03/27/09 1736 /jlr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERGYLABORA TORIES INC 2393 Sail CreekHihway 82601 P0 Box 3258 Caspel WV82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 caspercilenergy/ab.com wwwenergy/ab.comE1ERGY LARORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March CollectIon Date 03/18/09 1232 Lab ID C09030659-003 DateRecelved 03/20/09 Client Sample ID MW 32 Matrix Aqueous MCLI Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Cadmium 3.0 ug/L 0.5 E200.8 03/24/09 1948 ts Iron 8450 ug/L 30 E200.8 03/26/09 0749 sml Manganese 5410 ug/L 10 E200.8 03/27/09 0645 smi Nickel 64 ug/L 20 E200.8 03/24/09 1948 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 5.0 pCWL E900.1 03/31/09 1634/cgr Gross Alpha minus Rn Precision 0.7 pCi/L E900.1 03/31/09 1634/cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 03/31/09 1634/cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGYLABORA TORIES INC 2393 Sail C.reekH/way 82601 P0 Box 3258 Caspe WY82602 roll Free 888.235.0515 307.235.0515 Fax 307234.1639 casperenergy/ab.com www energy/ab cornEIERGY LIRORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March CollectIon Date 03/18/09 0817 Lab ID C09030659004 DateReceived 03/20/09 Client Sample ID MW 60 MatrIx Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Cadmium ND ug/L 0.5 E200.8 03/24/09 1954 ts Iron ND ug/L 30 E200.8 03/26/09 0756 smi Manganese ND ug/L 10 E200.8 03/24/09 1954 ts Nickel ND ug/L 20 E200.8 03/24/09 1954/ts Uranium ND ug/L 0.3 E200.8 03/24/09 1954/ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 0.4 pCi/L E900.1 03/31/09 1823 cgr Gross Alpha minus Rn Precision 0.3 pCi/L E900.1 03/31/09 1823 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 03/31/09 1823 cgr VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 03/27/09 1624/jIr Benzene ND ug/L 1.0 SW82608 03/27/09 1624/jlr Carbcn tetrachloride ND ug/L 1.0 SW8260B 03/27/09 1624 jlr Chloroform 6.6 ug/L 1.0 SW82608 03/27/09 1624 jlr Chloromethane ND ug/L 1.0 SW8260B 03/27/09 1624/jIr Methyl ethyl ketone ND ug/L 20 SW82608 03/27/09 1624 jlr Methylene chloride ND ug/L 1.0 SW8260B 03/27/09 1624 jlr Naphthalene ND ug/L 1.0 SW8260B 03/27/09 1624 jir Toluene ND ug/L 1.0 SW82608 03/27/09 1624 jlr Xylenes Total ND ug/L 1.0 SW8260B 03/27/09 1624/jlr Surr 12-Dichlorobenzene-d4 118 %REC 80-120 SW8260B 03/27/09 1624/jlr Surr Dibromofluoromethane 122 %REC 70-130 SW8260B 03/27/09 1624 /jlr Surr p-Bromofluorobenzene 90.0 %REC 80-120 SW8260B 03/27/09 1624 jlr Surr Toluene-d8 105 %REC 80-120 SW82608 03/27/09 1624 jir Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGVLASORA TORIES INC 2393 Sail Creek Hiqhway 82801 Pa Sax 3258 Caspei WY82602 Ta/I Free 888.235.0515 307235.0515 Fax 307234.1639 caspercilenergy/ab.com www energy/at cornElERG LAI3ORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March CollectIon Date 03/18/09 1232 Lab ID C09030659-005 DateReceived 03/20/09 Client Sample ID MW 65 Matrix Aqueous MCLI Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Cadmium 3.0 ugIL 0.5 E200.8 03/24109 2001 /ts Iron 8470 ug/L 30 E200.8 03126109 08021 sml Manganese 5310 ug/L 10 E200.8 03/27109 0718 smi Nickel 61 ug/L 20 E200.8 03124/09 2001 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 5.4 pCi/L E900.1 03/31/09 1823 cgr Gross Alpha minus Rn Precision 0.7 pCiL E900.1 03131/09 1823 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 03/31109 1823 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGYLABORA TORIES INC 2393 Sail Creek Hiqhway 82601 Pa Box 3258 Caspe WY82602 roil Free 888.235.0515 307235.0515 Pa 307.234 1639 casper4energy/ab.com www energy/all coin ANALYTICAL SUMMARY REPORT ENERGY LABORA TORIES April 06 2009 Denison Mines USA Corn 6425 Hwy 191 Blanding UT 84511 Workorder No C09030659 Quote ID C1640 POC Wells Monthly Groundwater Sampling Project Name Monthly Groundwater March Energy Laboratories Inc received the following samples for Denison Mines USA Corn on 3/2012009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09030659-001 MW 14 03118109 1441 03120109 Aqueous Metals by ICP/ICPMS Dissolved C09030659-002 MW 26 03118109 1109 03/20/09 Aqueous Metals by ICP/ICPMS Dissolved 5W8260B VOCs Standard List Aqueous Metals by ICPIICPMS Dissolved Gross Alpha minus Rn222 and Uranium Aqueous Metals by ICP/ICPMS Dissolved Gross Alpha minus Rn222 and Uranium SW8260B VOCs Standard List Aqueous Metals by ICP/ICPMS Dissolved Gross Alpha minus Rn222 and Uranium C09030659-006 Trip Blank 03/18/09 0000 03/20/09 Aqueous Cancelled Sample As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QA/QC Summary Report or the Case Narrative If you have any questions regarding these tests results please call C09030659-003 MW 32 03/18/09 1232 03/20/09 C09030659-004 MW 60 03/18/09 0817 03/20/09 C09030659-005 MW 65 03/18/09 1232 03/20/09 Report Approved By 3tq1IUM1 U3JAur ENERGYLASORA TORIES INC 2393 Sail Creak Hibway 82601 P0 Sex 3258 Caspa WY82602 ____________Tel/Free 888.235.0515 307235 0515 Fat 307234.1639 casparcanergyIab.cem www.energylab.com LABORA TORIES UA/UG Summary Report Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March Work Order C09030659 Result Units RI %REC Low Limit High Limit RPD RPDLlmit Qual Method E200.8 Batch R116229 Sample ID Cadmium Manganese Nickel Uranium IRS Method Blank ND mg/L ND mg/L ND mg/L ND mg/L 6E-05 5E-05 9E-05 8E-06 Run ICPMS2-C_090324A 03/24/09 1443 Sample ID Cadmium Manganese Nickel Uranium IFS Laboratory Fortified Blank 0.0506 mg/L 0.0513 mg/L 0.0513 mg/L 0.0501 mg/L 0.0010 0.0010 0.0010 0.00030 101 103 103 100 Run ICPMS2-C_090324A 85 115 85 115 85 115 85 115 03/24/09 1450 Sample ID Cadmium Manganese Nickel Uranium C09030666-OO2BMS4 Sample Matrix Spike 0.254 mg/L 0.266 mg/I 0.250 mg/L 0.377 mg/L 0.010 0.010 0.050 0.00030 102 100 100 107 Run ICPMS2-C_090324A 70 130 70 130 70 130 70 130 03/24/09 2049 Sample ID Cadmium Manganese Nickel Uranium C09030666-OO2BMSD4 Sample Matrix Spike Duplicate 0.256 mg/L 0.269 mg/L 0.252 mg/L 0.377 mg/L 0.010 0.010 0.050 0.00030 103 101 101 107 Run ICPMS2-C_090324A 70 130 70 130 70 130 70 130 0.8 0.9 0.5 0.1 03/24/09 2055 20 20 20 20 Method E200.8 Batch R116267 Sample ID Iron Manganese Uranium IRS Method Blank ND mg/I ND mg/I ND mg/L 0.0006 3E-05 3E-05 Run lCPMS4C_090325A 03/25/09 1339 Sample ID Iron Manganese Uranium LFB Laboratory Fortified Blank 1.31 mg/I 0.0497 mg/L 0.0473 mg/L 0.0010 0.0010 0.00030 105 99 95 Run ICPMS4-C090325A 85 115 85 115 85 115 03/25/09 1346 Sample ID Iron Manganese Uranium C09030629-OO3CMS4 Sample Matrix Spike 1.50 mg/I 0.137 mg/I 0.158 mg/I 0.030 0.010 0.00030 101 98 110 Run ICPMS4-C_090325A 70 130 70 130 70 130 03/26109 0715 Sample ID Iron Manganese Uranium C09030629-OO3CMSD4 Sample Matrix Spike Duplicate 1.50 mg/I 0.136 mg/I 0.160 mg/I 0.030 0.010 0.00030 101 96 114 Run ICPMS4-C_090325A 70 130 70 130 70 130 0.4 0.8 1.4 03/26/09 0722 20 20 20 Qualifiers RI Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated MDC Minimum detectable concentration LABORA TORIES ENERGYLABORA TORIES INC 2393 Sail Creek Hibway 82601 Pa Box 3258 Caspei WY82602 To//Free 888.235.0515 307235.0515 Fax 307234.1539 casperGenergyfaA corn www.energylab.com QA/UC Summary Report Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March Work Order C09030659 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimIt Qual Method E200.8 Batch R116316 Sample ID LRB Method Blank Run ICPMS4-C90326A 03126/09 1446 Manganese ND mg/L 3E-05 Sample ID LFB Laboratory Fortified Blank Run ICPMS4-C_090326A 03/26/09 1452 Manganese 0.0473 mg/L 0.0010 95 85 115 Sample ID C0903065g-OO5AMS4 Sample Matrix Spike Run ICPMS4-C_090326A 03/27/09 0725 Manganese 5.50 mgIL 0.010 70 130 Sample ID C09030659-OO5AMSD4 Sample Matrix Spike Duplicate Run ICPMS4-C_090326A 03/27/09 0731 Manganese 5.52 mg/L 0.010 70 130 0.3 20 Method E900.1 Batch GA-0225 Sample ID MB-GA-0225 Method Blank Run G5000W_090327B 03/31/09 1634 Gross Alpha minus Rn 0.9 pCi/L Gross Alpha minus Rn Precision 0.3 pCi/L Gross Alpha minus Rn MDC 0.3 pCi/L Sample ID LCS-GA-0225 Laboratory Control Sample Run G5000W 090327B 03/31/09 1634 Gross Alpha minus Rn 25.5 pCi/L 93 70 130 Sample ID TAP WATER-MS Sample Matrix Spike Run G5000W090327B 03/31/09 1823 Gross Alpha minus Rn 25.3 pCi/L 92 70 130 Sample ID TAP WATER-MSD Sample Matrix Spike Duplicate Run G5000W_090327B 03/31/09 1823 Gross Alpha minus Rn 26.9 pCi/L 98 70 130 6.1 21.8 ENERO LABORA TORIES INC 2393 Sail Creek Hi/iway 82601 P0 Box 3258 Caspe1c WV82602 roll Free 889235.0515 307235.0515 Fax 307.234.1639 caspercenergy/ab.ccm wwwenergy/a/acomENERGY LAIJORA TORIES QA/UC summary Report Client Denison Mines USA Corp Report Date 04/06/09 Project Monthly Groundwater March Work Order C09030659 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLlmit Qual Method 5W8260B Batch R116385 Sample ID 27-Mar-O9_LCS_3 Laboratory Control Sample Run 5975V0C1_090327A 03/27/09 1059 Acetone 99 ug/L 20 99 70 130 Benzene 11 ug/L 1.0 110 70 130 Carbon tetrachloride 11 ug/L 1.0 112 70 130 Chloroform 11 ug/L 1.0 110 70 130 Chloromethane 11 ug/L 1.0 110 70 130 mp-Xylenes 22 ug/L 1.0 109 70 130 Methyl ethyl ketone 120 ug/L 20 116 70 130 Methylene chloride 11 ug/L 1.0 111 70 130 Naphthalene 9.5 ug/L 1.0 95 70 130 o-Xylene 11 ug/L 1.0 110 70 130 Toluene 11 ug/L 1.0 109 70 130 Xylenes Total 33 ug/L 1.0 109 70 130 Surr 12-Dichlorobenzene-d4 1.0 111 80 120 Surr Dibromofluoromethane 1.0 114 70 130 Sum p-Bromofluorobenzene 1.0 98 80 130 SurrToluene-d8 1.0 111 80 120 Sample ID 27-Mar-09_MBLK_6 Method Blank Run 5975V0C1_090327A 03/27/09 1248 Acetone ND ug/L 20 Benzene ND ug/L 1.0 Carbon tetrachioride ND ug/L 1.0 Chloroform ND ug/L 1.0 Chloromethane ND ug/L 1.0 mp-Xylenes ND ug/L 1.0 Methyl ethyl ketone ND ug/L 20 Methylene chloride ND ug/L 1.0 Naphthalene ND ug/L 1.0 o-Xylene ND ug/L 1.0 Toluene ND ug/L 1.0 Xylenes Total ND ug/L 1.0 Surr 1.2-Dichlorobenzene-d4 1.0 114 80 120 Surr Dibromofluoromethane 1.0 111 70 130 Surr p-Bromofluorobenzene 1.0 90 80 120 Surr Toluene-d8 1.0 104 80 120 Sample ID C09030659-OO2BMS Sample Matrix Spike Run 5975V0C1_090327A 03/27/09 1812 Acetone 23000 ug/L 4000 115 70 130 Benzene 4600 ug/L 200 116 70 130 Carbon tetrachloride 5100 ug/L 200 127 70 130 Chloroform 6200 ug/L 200 125 70 130 Chloromethane 2800 ug/L 200 138 70 130 mp-Xylenes 7000 ug/L 200 116 70 130 Methyl ethyl ketone 26000 ug/L 4000 130 70 130 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERG VLABORA TORIES INC 2393 Sail Creek Hifqhway 82601 P0 Box 3258 Caspe WY82602 ____________Toll Free 888.235.0515 307235.0515 Fax 307234.1639 casperenergy/ab.com www.energylab.com LABORA TORIES QA/UG Summary Report Client Denison Mines USA Corn Report Date 04/06/09 Project Monthly Groundwater March Work Order C09030659 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method SW8260B Batch R116385 Sample ID c09030659-O02BMS Sample Matrix Spike Run 5975V0C1_090327A 03/27/09 1812 Methylene chloride 2700 ug/L 200 133 70 130 Naphthalene 2100 ug/L 200 106 70 130 o-Xylene 4700 ug/L 200 118 70 130 Toluene 4600 ug/L 200 115 70 130 Xylenes Total 12000 ug/L 200 97 70 130 Surr 2-Dichlorobenzene-d4 200 114 80 120 Surr Dibromofluoromethane 200 126 70 130 Surr p-Bromofluorobenzene 200 98 80 120 Surr Toluene-d8 200 110 80 120 Sample ID C09030659-OO2BMSD Sample Matrix Spike Duplicate Run 5975V0C1_090327A 03/27/09 1848 Acetone 22000 ug/L 4000 110 70 130 Benzene 4700 ug/L 200 118 70 130 20 Carbon tetrachloride 4800 ug/L 200 121 70 130 4.7 20 Chloroform 5900 ug/L 200 118 70 130 5.1 20 Chloromethane 2900 ug/L 200 146 70 130 5.6 20 mp-Xylenes 7100 ug/L 200 119 70 130 20 Methyl ethyl ketone 24000 ug/L 4000 120 70 130 7.7 20 Methylene chloride 2600 ug/L 200 129 70 130 20 Naphthalene 2200 ug/L 200 109 70 130 2.6 20 o-Xylene 4700 ug/L 200 118 70 130 0.5 20 Toluene 4700 ug/L 200 117 70 130 2.1 20 Xylenes Total 12000 ug/L 200 99 70 130 1.4 20 Surr 12-Dichlorobenzene-d4 200 113 80 120 10 Surr Dibromofluoromethane 200 118 70 130 10 Surr p-Bromofluorobenzene 200 96 80 120 10 Surr Toluene-d8 200 108 80 120 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits Co m p a n y Na m e Dc n s o n /U n c % Re p o r t Ma i l Ad d r e s s A1 t4 S 1 \ Po a s s c 84 Pr o j e c t Na m e PW S Pe r m i t Et c Sa m p l e Or i g i n /k e n t t -r -- - St a t e cr Co n t a c t Na Ph o n e / F a x Em a i l Kc r 43 5 C7 5 fl EP A / S t a t e Co m p l i a n c e Ye s No Sa m p l e r Pl e a s e Pr i n t cn n c t - Ho 1 4 1 In v o i c e Ad d r e s s Sc 4 f l In v o i c e Co n t a c t Ph o n e Gi g Pu r c h a s e Or d e r Qu o t e / B o t t l e Or d e r Co n t a c t EL I pr i o r to Sh i p p e d by RU S H sa m p l e su b m i t t a l 1J I 1 4 - 4 fo r ch a r g e s an d co o l e r iD s $ sc h e d u l i n g - S e e in s t r u c t i o n Pa g e Co m m e n t s Re c e i p t Te m p On ic e No cu s t o d y s e a l j N co o l e r s Bo t t l e s in t a c t Sig n a t u r e Ma t c h Sp e c i a l R e p o r t / F o r m a t s EL I mu s t be no t i f i e d pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g DD w GS A ED D / E D T E l e c t r o n i c Da t a DP O T W / W W T P Fo r m a t _ _ _ _ _ Os t a t e DL E V E L I V ON E L A C 2l jC O 5 ew1i co SA M P L E ID E N T I F I C A T I O N Na m e Lo c a t i o n In t e r v a l et c Co l l e c t i o n Da t e Co l l e c t i o n Ti m e MA T R I X MV J IH M\ J 3 Mv J W ii S 3- - 2 \ 3- I - O O t s- I - c A t- o o q -I $ - . O o ft l t UO t3 o7 \v J 4v J Iv - 4V J it i __ _ _ _ __ _ _ _ 10 @_ _ _ Cu s t o d y Re l i n b s d by pr i n t Da t e / T i m e ni n n a t t i r Łie d T h i i p 9 i i W sig n a t u r e Re c o r d MW i4 0 t U 1 3f V 4 h O O 0 Re i i n q u i a h e d by pr i n t Da t e / l i m e sig n a t u r e Re c e i v e d by pr i n t Da t e / l i m e Sig n a t u r e Rn e j d by La b o r Da t e r n m e sig n a t u r e MU S T be Si g n e d Sa m p l e Dis p o s a l Re t u r n to cl i e n t La b Dis p o s a l -g . g 7 1- X cv c c 2 In ce r t a i n ci r c u m s t a n c e s s a m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s In c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to co m p l e t e th e an a l y s i s re q u e s t e d Th i s se r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n t r a c t d a t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l r e p o r t Vis i t ou r we b si t e at ww w . e n e r g y l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s Et E R G Y LA / I c il / A Ic /I / / Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d Pa g e of _ _ _ PL E A S E PR I N T - Pr o v i d e a s mu c h In f o r m a t i o n as oo s s i b l e Energy Laboratories Inc VVo rkorde Receipt Checklist Denison Mines USA Corp C09030659 Login completed by Corinne Wagner Date and Time Received 3/20/2009 900 AM Reviewed by Received by pb Reviewed Date Carrier name Next Day Air Shipping container/cooler in good condition Yes No Not Present custody seals intact on shipping containerlcooler Yes No Not Present custody seals intact on sample bottles Yes No Not Present chain of custody present Yes No chain of custody signed when relinquished and received Yes No chain of custody agrees with sample labels Yes No Samples in proper container/bottle Yes No Sample containers intact Yes No Sufficient sample volume for indicated test Yes No All samples received within holding time Yes No containerrrempslanktemperature 2t On Ice Water VOA vials have zero headspace Yes No No VOA vials submitted Water pH acceptable upon receipt Yes No Not Applicable contact and corrective Action comments None ENERGYLASORA TORIES INC 2393 Sail Creek Hiqbway 82501 P0 Box 3258 Caspe1c WY82502 Toll Free 888.235.0515 307235.0515 Fax 307234.1539 caspercenergy/ab.com wwwenergy/ab.com CLIENT Denison Mines USA Corp Date 10-Apr-09 Project Monthly Groundwater March CASE NARRATIVE Sample Delivery Group C09030659 LABORATORY COMMENTS Trip Blank lost due to analytical equipment error ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOILJSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 021 18CA Oregon WY200001 Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energylab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT EIERGY LABORA TORIES ENERGYLABORA TORIES INC 2393 Sail Creek Hiqhway 8260 P0 Box 3258 Caspei WY 82502 Toil Free 888.235.0515 307.235.0515 Fax 307.234.1539 caspenilenergy/ab.com www.energylab.comEIERGY LAIIORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03124/09 Project 1st Quarter Groundwater 2009 Collection Date 02/11/09 1006 Lab ID C09020538001 DateReceived 02/13/09 Client Sample ID MW-i Matrix Aqueous MCLI Analyses Result Units QualIfIers RL QCL Method Analysis Date By METALS DISSOLVED Manganese 83 ug/L 10 E200.8 03/16/09 1416/ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERGVLABORI4 TORIES INC 2393 Sail Creek Hibway 82601 PC Box 3258 Caspec WY82602 Toll Free 888.2350515 3072350515 Fax 307234.1639 caspenllenergy/ab.com wwwenergylab.comENERGY LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/17/09 Project 1st Quarter Groundwater Collection Date 02/09/09 1132 Lab ID C09020434-001 DateReceived 02/11/09 Client Sample ID MW Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Manganese 468 ug/L 10 E200.8 03/09/09 1242 sml Selenium 20.7 ugL 5.0 E200.8 02/19/09 1739 ts Thallium 0.89 ug/L 0.50 E200.8 02/19/09 1739 ts Uranium 27.7 ugL 0.30 E200.8 02/19/09 1739ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit EIERGY LARORA TORIES ENERG YLASORA TORIES INC 2393 Sail Creek HI7hway 82601 P0 Sax 3258 Caspec WY82602 Tail Free 886235.0515 3072350515 Fax 307234.1639 casper4energy/ab.cam www.energylab.com LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 03/17/09 1st Quarter Groundwater Collection Date 02/09/09 1040 C09020434-002 DateReceived 02/11/09 Matrix Aqueous Client Project Lab ID Client Sample ID MW 3A MCU Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mgL A2320 02/13/09 1515 IJI Bicarbonate as HCO3 265 mgL A2320 02/13/09 1515 IjI Calcium 481 mgL 0.8 E200.7 02/24/09 1832cp Chloride 49 mgL A4500-Cl 02/11/09 1603 sp Flugride 1.4 myIL 0.1 A4500-F 02/12/09 13.07 fl Magnesium 320 mgL 0.5 E200.7 02/24/09 1832 cp Nitrogen Ammonia as ND mgL 0.05 A4500-NH3 02/12/09 1258/jal Nitrogen NitrateNitrite as 1.5 mgL 0.1 E353.2 02/18/09 1221 jal Potassium 28.6 mgL 0.5 E200.7 02/24/09 1832 cp Sodium 761 mgL E200.7 02/24/09 1832 cp Sulfate 3730 mgL 60 A4500-504 02/24/09 1258 sp PHYSICAL PROPERTIES pH 6.76 s.u 0.01 A4500-H 02/11/09 1259 dd Solids Total Dissolved TDS 180 5690 mg/L 10 A2540 02/11/09 1327 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/23/09 2300 ts Beryllium 2.48 ug/L 0.50 E200.8 02/23/09 2300 ts Cadmium 3.34 ug/L 0.50 E200.8 02/23/09 2300 ts Chromium ND ug/L 25 E200.8 02/23/09 2300 ts Cobalt ND ug/L 10 E200.8 02/23/092300 ts Copper ND ug/L 10 E200.8 02/23/092300 ts Iron ND ug/L 30 E200.8 03/09/09 1248sml Lead ND ug/L 1.0 E200.8 02/23/09 2300 ts Manganese 480 ug/L 10 E200.8 02/23/09 2300 /ts Mercury ND ug/L 0.50 E200.8 02/25/09 1443 ts Molybdenum ND ug/L 10 E200.8 02/23/09 2300/ts Nickel 29 ug/L 20 E200.8 02/23/09 2300 ts Selenium 107 ug/L 5.0 E200.8 02/23/09 2300 ts Silver ND ug/L 10 E200.8 02/23/09 2300 ts Thallium 1.12 ug/L 0.50 E200.8 02/23/092300 /ts Tin ND ug/L 100 E200.8 02/23/09 2300 ts Uranium 16.5 ug/L 0.30 E200.8 02/23/09 2300 /ts Vanadium ND ug/L 15 E200.8 02/23/09 2300/ts Zinc 105 ug/L 10 E200.8 02/23/09 2300 ts RADIONUCLIDES DISSOLVED Cross Alpha minus Rn 0.9 pCi/L E900 03/02/09 1549 cgr Gross Alpha minus Rn Precision 0.3 pCi/L E900.1 03/02/09 1549/cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900 03/02/09 1549 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference EIERCY LAI3ORA TORIES Client Project Lab ID Client Sample ID MW 3A Analyses DATA QUALITY A/C Balance Anions Cations Solids Total Dissolved Calculated lOS Balance 0.80-1.20 VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 Report RL Analyte reporting limit Definitions QCL Quality control limit Spike recovery outside of advisory limits ENERGYLABORA TORIES INC p2393 Sail Creek H1qbway 82601 AO Sax 3258 Caspei WY82602 Tall Free 888.235.0515 307235.0515 Far 307234.1639 casperenergy/ab.com wwwenergy/ab.cam LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 03/17/09 1st Quarter Groundwater Collection Date 02/09/09 1040 C09020434-002 DateReceived 02/11/09 Matrix Aqueous MCL/ Result Units Qualifiers RL QCL Method Analysis Date By 0.315 Calculation 02/26/09 0745 kbh 83.6 meq/L Calculation 02/26/09 0745 kbh 84.1 meq/L Calculation 02/26/09 0745 kbh 5520 mg/L Calculation 02/26/09 0745 kbh 1.03 Calculation 02/26/09 0745 kbh ND ug/L 20 5W8260B 02/12/09 1429/wen ND ug/L 1.0 SW8260B 02/12/09 1429/wen ND ug/L 1.0 5W8260B 02/12/09 1429/wen ND ug/L 1.0 5W8260B 02/12/09 1429 /wen ND ug/L 1.0 SW8260B 02/12/09 1429/wen ND ug/L 20 SW8260B 02/12/09 1429/wen ND ug/L 1.0 SW8260B 02/12/09 1429/wen ND ug/L 1.0 5W8260B 02/12/09 1429/wen ND ug/L 1.0 SW8260B 02/12/09 1429/wen ND ug/L 1.0 5W8260B 02/12/091429 /wen 112 %REC 80-1 20 5W8260B 02/12/09 1429 /wen 114 %REC 70-130 5W8260B 02/12/09 1429/wen 123 %REC 80-120 SW8260B 02/12/09 1429/wen 116 %REC 80-120 5W8260B 02/12/09 1429/wen MCL Maximum contaminant level ND Not detected at the reporting limit ENERGYLABORA TORIES INC 2393 Sail CreekH/qbway 8260 P0 Box 3258 Casper WV82602 Toll Free 888.235 05/5 307235.0515 Far 307234.1639 casperOenecgy/aAcaiv www.energylab.com LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/04/09 1207 Lab ID C09020267-001 DateReceived 02/06/09 Client Sample ID MW Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Fluoride 1.0 mg/L 0.1 A4500-F 02110/09 1234/UI METALS DISSOLVED Manganese 154 ug/L 10 E200.8 02/23/09 1842 ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions DCL Quality control limit ND Not detected at the reporting limit EIERGY LA/IDEA TOE/ES ENERGYLASORA TORIES PC P2393 Salt CreekHihway 82601 P0 Box 32F Caspec WY82602 ____________Toll Free 886236.0515 3072J 15 Fax 307234.1639 caspenenergy/ab.cofl ww.eaergy/ab.com LASORATO/IES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03111/09 Project 1st Quarter Groundwater Collection Date 02/16/09 1322 Lab ID C09020662-001 DateReceived 02/18109 Client Sample ID MW-Il Matrix Aqueous MCI Analyses Result Units Qualifiers RI QCL Method Analysis Date By MAJOR IONS Carbonate as C03 mg/L A2320 02/19/09 1748 131 Bicarbonate as HCO3 358 mg/L A2320 02/19/09 1748 lii Calcium 44.4 mg/I 0.50 6200.7 03/05/09 2009 rdw Chloride 29 mg/I A4500-Cl 02/27/09 1228 sp Fluoride 0.6 mg/I 0.1 A4500-F 02/23/09 1149 IjI Magnesium 12.4 mg/I 0.50 E200.7 03/05/09 2009 rdw Nitrogen Ammonia as 0.67 mg/I 0.05 A4500-Nl-13 03/04/09 0928 /jal Nitrogen NitrateNitrite as ND mg/I 0.05 6353.2 02/25/09 1334 jal Potassium 6.33 mg/I 0.50 E200.7 03/05/09 2009 rdw Sodium 581 mg/I 0.50 E200.7 03/05/09 2009 rdw Sulfate 977 mg/I 10 A4500-504 02/26/09 1341 /jal PHYSICAL PROPERTIES p11 7.92 s.u 0.01 A4500-F-l 02/18/09 1518/dd Solids Total Dissolved TDS 180 1910 mg/I 10 A2540 02/19/09 1404/ab METALS DISSOLVED Arsenic ND ug/I 5.0 E200.8 02/20/09 1815/ts Beryllium ND ug/L 0.50 6200.8 02/24/09 0149 Is Cadmium ND ug/I 0.50 6200.8 02/20/09 1815 ts Chromium ND ug/I 25 6200.8 02/20/09 1815 ts Cobalt ND ug/l 10 E200.8 02/20/09 1815/Is Copper ND ug/I 10 E200.B 02/20/09 1815/Is Iron 138 ug/I 30 E200.7 03/05/09 2009 rdw lead ND ugll 1.0 6200.8 02/20/09 1815/ts Manganese 73 ug/L 10 E200.8 02/20/09 1815/Is Mercury ND ug/l 050 E200.8 02/20/09 1815 /ts Molybdenum ND ug/l 10 6200.8 02/20/09 1815/Is Nickel ND ug/l 20 6200.8 02/20/09 1815 Is Selenium ND ug/l 5.0 6200.8 02/20/09 1815 Is Silver ND ug/I 10 E200.8 02120/09 1815 /15 Thallium ND ug/l 0.50 E200.8 02/20/09 1815 Is Tin ND ug/I 100 6200.8 02/20/09 1815/ts Uranium ND ug/l 0.30 E200.8 02120/09 1815 /ts Vanadium ND ug/I 15 E200.8 02/20/09 1815/Is Zinc ND ug/l 10 E200.8 02/20/09 1815/ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 0.6 pCi/I E900.1 03/06/09 1648 cgr Gross Alpha minus Rn Precision 0.4 pCi/I 6900.1 03/06/09 1648 cgr Gross Alpha minus Rn MDC 0.4 pCi/L E900.1 03/06/09 1648 cgr Report RI Analyte reporting limit MCI Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RI Increased due to sample matrix Interference wrww ENERO VLASOR14 TORIES PC 2393 Sail CreekHiqhway 52501 RO Box S2 Caspe WY82502LSSASLWTollFree 558.235.0515 3072 75 Fax 307234.1639 casperenergy/aAco wwanargyfab.com L4BORA TORIES LABORATORY ANALYTICAL REPORT Client Project Lab ID Client Sample ID Denison Mines USA Corp 1st Quarter Groundwater C09020662-00t MW-li Report Date 03/11/09 Collection Date 02/16/09 1322 DateReceived 02/18/09 Matrix Aqueous DATA QUAUTY NC Balance meq/L meq/L mgIL Calculation Calculation Calculation Calculation Calculation 03/09/09 1046 kbh 03/09/09 1046 kbh 03/09/09 1046 kbh 03/09/09 1046 kbh 03/09/09 1046 kbh Report RI Analyte reporting limit Definitions QCL Quality control limit MCL Maximum contaminant level MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By 2.69 27.2 28.7 1840 1.04 Anions Cations Solids Total Dissolved Calculated TDS Balance 0.80-1.20 VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachioride Chloroform Chlorcmethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Sum Toluene-d8 ND ug/L ND ug/L ND ugL ND ug/L ND ug/L ND ug/L ND ugL ND ug/L ND ug/L ND ug/L 113 %REC 112 %REC 117 %REC 110 %REC 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-1 30 80-120 80-120 SW8260B SW82608 SW8260B SW8260B SW82608 SW8260B SW8260B SW8260B SW82SOB SW8260B SW82608 SW8260B SW8260B SW8260B 02/25/09 003 wen 02/25/09 003 wen 02/25/09 0031 /wen 0225/09 0031 wen 02/25/09 0031 wen 02/25/09 0031 wen 02/25/09 0031 wan 02/25/09 0031 /wen 02/25109 0031 wen 02/25/09 0031 /wen 02/25/09 0031 /wen 02/25/09 0031 wan 02/25/09 003 wan 02/25/09 0031 wen ND Not detected at the reporting limit ENERGYLASORA TORIES INC 2393 Sail Creek Hi/i way 82601 P0 Sax 3259 Caspei WV82602 ____________Tall Free 888.235.0515 307235.0515 Fax 307234.1539 casperenergy/aO.cain wwwetiergy/ab.cam LASORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corn Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/04/09 1352 Lab ID C09020267-002 DateRecelved 02/06/09 Client Sample ID MW 12 Matrix Aqueous MCL Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Manganese 17 ug/L 10 E200.8 02/13/09 1740 /ts Uranium 18.0 ug/L 0.30 E200.8 02/13/09 1740 ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERG VLABORA TORIES INC 239353/Creek Hibway 82501 P0 Box 3258 Caspec WY 82502 ____________Toll Free 888.235.0515 3072350515 FaK 307234.1539 caspeitenergy/ab.conr www.energylab.com LABORATORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/04/09 0940 Lab ID C09020267-003 DateReceived 02/06/09 Client Sample ID MW 14 Matrix Aqueous MCI Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1620 ljl Bicarbonate as MCO3 457 mg/L A2320 02/09/09 1620 Ijl Calcium 517 mg/L 0.5 E200.7 0211709 1626 rdw Chloride 16 mgL A4500-Cl 02/09/09 1421 sp Fluoride 0.2 mg/L 0.1 A4500-F 02/10/09 1236 IjI Magnesium 152 mg/L 0.5 E200.7 02/17/09 1626 rdw Nitrogen Ammonia as ND mg/L 0.05 A4500-NH3 02112/09 1214 jal Nitrogen NitrateNitrite as ND mg/L 0.1 E353.2 02/11/09 1042 jal Potassium 11 mg/L E200.7 02/11/092252 rdw Sodium 323 mg/L 0.5 E200.7 02/11/09 2252 rdw Sulfate 2150 mg/L 30 A4500-504 02/10/09 1307/sp PHYSICAL PROPERTIES pH 6.86 s.u 0.01 A4500-H 02/06/09 1332/dd Solids Total Dissolved TDS 180 3670 mg/L 10 A2540 02/06/09 1348/ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/13/09 1746/ts Beryllium ND ug/L 0.50 E200.8 02/13/09 1746/ts Cadmium 1.19 ug/L 0.50 E200.8 02/13/09 1746/Is Chromium ND ug/L 25 E200.8 02/13/09 1746 Is Cobalt ND ug/L 10 E200.8 02/13/09 1746/ts Copper ND ugL 10 E200.8 02/13/09 1746ts Iron ND ug/L 30 E200.7 02/17/09 1626/rdw Lead ND ugIL 1.0 E200.8 02/13/09 1746/Is Manganese 2190 ug/L 10 E200.8 02/13/09 1746/Is Mercury ND ug/L 0.50 E200.8 02/18/09 1720 ts Molybdenum ND ug/L 10 E200.8 02/18/09 1720 ts Nickel ND ug/L 20 E200.8 02/13/09 1746 ts Selenium 5.0 ugIL 5.0 E200.8 02113/09 1746/Is Silver ND ugiL 10 E200.8 02/13/09 1746 ts Thallium ND ug/L 0.50 E200.8 02/13/09 1746/Is Tin ND ug/L 100 E200.8 02/13/09 1746/ts Uranium 60.5 ug/L 0.30 E200.8 02/13/09 1746/Is Vanadium ND ug/L 15 E200.8 02/1 3109 1746 /ts Zinc 51 ug/L 10 E200.8 0213/09 1746ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 1.2 pCWL E900 03/02/09 1228 cgr Gross Alpha minus Rn Precision 0.4 pCi/L E900.1 03/02/09 1228 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 03/02/09 1228 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERGYLABORA roB/Es INC 2393 Se/I Creek Hig/i way 82601 P0 Box 3258 Caspei WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 caspenWenergy/aLzcom www energy/ak coni LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/04/09 0940 Lab ID C09020267-003 DateReceived 02/06/09 Client Sample ID MW 14 Matrix Aqueous MCLI Analyses Result Units Qualifiers RL QCL Method Analysis Date By DATA QUALITY NC Balance -0.136 Calculation 02/23/09 1050/kbh Anions 52.7 meq/L Calculation 02/23/09 1050 kbh Cations 52.6 meq/L Calculation 02/23/09 10501 kbh Solids Total Dissolved Calculated 3410 mg/L Calculation 02/23/09 1050 kbh TDS Balance 0.80-1.20 1.08 Calculation 02/23/09 1050 kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/09/09 2128 wen Benzene ND ug/L 1.0 SW8260B 02/09/09 2128 wen Carbon tetrachloride ND ug/L 1.0 SW8260B 02/09/09 2128 wen Chloroform ND ug/L 1.0 SW8260B 02/09/09 2128 wen Chloromethane ND ug/L 1.0 SW8260B 02/09/09 2128/wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/09/09 2128 wen Methylene chloride ND ugJL 1.0 SW8260B 02/09/09 2128 wen Naphthalene ND ug/L 1.0 SW8260B 02/09/09 2128 wen Toluene ND ug/L 1.0 SW8260B 02/09/09 2128/wen Xylenes Total ND ugIL 1.0 SW8260B 02/09/09 2128 wen Surr 2-Dichlorobenzene-d4 117 %REC 80-120 SW8260B 02/09/09 2128 wen Surr Dibromofluoromethane 120 %REC 70-130 SW8260B 02/09/09 2128 wen Surr p-Bromofluorobenzene 119 %REC 80-120 SW8260B 02/09/09 2128/wen Surr Toluene-d8 116 %REC 80-120 SW8260B 02/09/09 2128/wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERG YLABORA TORIES tNt 2393 Sail Creek Hibway 8250 P0 Sax 3258 Caspe1c WV82602 ____________Tall Free 888.235 0515 307235.0515 Fax 3072341639 casperenergy/ab.cam www.energylab.com LARORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/17/09 Project 1st Quarter Groundwater Collection Date 02/09/09 1612 Lab ID C09020434-004 DateReceived 02/11/09 Client Sample ID MW 15 Matrix Aqueous MCL Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Selenium 110 ug/L 5.0 E200.8 02/19/09 1820/ts Uranium 45.7 ug/L 0.30 E200.8 0219/09 1820/ts Report RL -Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit EIERGY LAIORA TORIES ENERGYLABORA TORIES INC 2393 Sail CreekHIbway 8260 P0 Box 3258 Caspei WY82602 Toil Free 888.235.0515 307.235.0515 Fax 307234.1639 casperenergyIab.com www.enecgylab.com LABORATORY ANALYTICAL REPORT Client Project Lab ID Client Sample ID Denison Mines USA Corp 1st Quarter Groundwater C09020434-003 MW 17 Report Date 03/17/09 Collection Date 02/09/09 1357 DateReceived 02/11/09 Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By 0.57 ug/L 28.7 ug/L 0.50 0.30 E200.8 0219/09 1813/ts E200.8 02/19/09 1813/ts METALS DISSOLVED Thallium Uranium Report RL Analyte reporting limit Definitions QCL-Quality control limit MCL Maximum contaminant level ND Not detected at the reporting limit ENERGVLABORA TORIES INC 2393 Sail Creek H1qhway 82601 P0 Box 3258 Casper WV82602 Toll Free 888.235 0515 307235.0515 Fax 307.234.1639 casperdienergy/ab.com wwwenergy/ab.com LAI3ORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Carp Report Date 03/24/09 Project 1st Quarter Groundwater 2009 Collection Date 02/11/09 1222 Lab ID C09020538002 DateReceived 02/13/09 Client Sample ID MW-18 Matrix Aqueous MW Analyses Result Units Qualifiers RL QCL Method Analysis Date By METALS DISSOLVED Thallium 1.53 ug/L 0.50 E200.8 02/25/09 1725 ts Uranium 39.4 ug/L 0.30 E200.8 02/25/09 1725/ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERO VLABORA TORIES INC 2393 Sail Creek Hibway 82601 P0 Box 3258 Caspei WY82602 lb//Free 888.235.0515 307235.0515 Far 307234.1639 casperenergy/ab.com wwwenergy/ab.com LABORATORY ANALYTICAL REPORT Revised Date 04/06/09 Client Denison Mines USA Corp Report Date 03/24/09 Project 1st Quarter Groundwater 2009 Collection Date 02/11/09 1222 Lab ID C09020538-002 DateReceived 02/13/09 Client Sample ID MW-I Matrix Aqueous MCU Analyses Result Units Qualifier RL QCL Method Analysis Date By METALS DISSOLVED Manganese 121 ug/L 10 E200.8 02/25/09 1725 /ts Thallium 1.53 ug/L 0.50 E200.8 02/25/09 1725 /ts Uranium 39.4 ug/L 0.30 E200.8 02/25/09 1725 ts Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit EPSERGY LABQ/ATOI/E5 ENERGVLASORA TORIES INC 2393 Sail Creek Hiqbway 82601 RO Box 3258 Caspe WY82602 ____________Toll Free 888235.0515 307235.0515 Fax 307234.1639 casperenergylab.com wwwenergy/ab.com LARORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/24/09 Project 1st Quarter Groundwater 2009 Collection Date 02/11/09 1432 Lab ID C09020538-003 DateReceived 02/13/09 Client Sample ID MW-19 Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Fluoride 1.1 mgL 0.1 A4500-F 02/18/09 1402 IjI Nitrogen NitrateNitiite as 2.4 mgL 0.1 E353.2 02/18/09 1256 Ijal METALS DISSOLVED Selenium 9.6 ugIL 5.0 E200.8 02125/09 1732 ts Thallium ND ugIL 0.50 E200.8 02/25/09 1732 ts Uranium 6.52 ugIL 0.30 E200.8 02/25/09 1732 Its Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERGYLABORA TORIES INC 2393 Sail CreekHihway 82601 P0 Sex 3258 Caspet WV82602 Tell Free 885235 0515 307235.0515 Fax 307234.1639 casper.energylab.cem wenergy/ab.cemEPERGY LASORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/02/09 1117 Lab ID 009020234-001 DateReceived 02/05/09 Client Sample ID MW 20 Matrix Aqueous MCLI Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as 003 ND mg/L A2320 02/09/09 1406 Iji Bicarbonate as HCO3 287 mg/L A2320 02/09/09 1406/ IjI Calcium 361 mg/L 0.50 E200.7 02/11/09 2130 rdw Chloride 59 mg/L A4500-Cl 02/09/09 140 sp Fluoride 0.3 mg/L 0.1 A4500-F 02/10/09 1141 Iji Magnesium 103 mg/L 0.50 E200.7 02/11/092130 rdw Nitrogen Ammonia as 0.23 mg/L 0.05 A4500-NH3 02/12/09 1150 jal Nitrogen NitrateNitrite as 4.9 mg/L 0.1 E353.2 02/11/09 1012 /jal Potassium 44.8 mg/L 2.0 E200.7 02/11/09 2130 rdw Sodium 1200 mg/L 0.50 E200.7 02111/09 2130 rdw Sulfate 3600 mg/L 30 A4500-S04 02/09/09 1630 sp PHYSICAL PROPERTIES pH 7.58 s.u 0.01 A4500-H 02/05/09 1538/dd Solids Total Dissolved TDS 1800 5780 mg/L 10 A2540 02/06/09 1343 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0216 ts Beryllium ND ug/L 0.50 E200.8 02/07/09 0216 ts Cadmium ND ug/L 0.50 E200.8 02/07/09 0216 ts Chromium ND ugIL 25 E200.8 02/07/09 0216 ts Cobalt ND ug/L 10 E200.8 02/07/09 0216 ts Copper ND ug/L 10 E200.8 02/07/09 0216 ts Iron 38 ug/L 30 E200.7 02/11/09 2130/rdw Lead ND ug/L 1.0 E200.8 02/07/090216/ts Manganese 38 ugIL 10 E200.8 02/07/09 0216 ts Mercury ND ug/L 0.50 E200.8 02/18/09 1502 ts Molybdenum ND ug/L 10 E200.8 02/07/09 0216 ts Nickel ND ug/L 20 E200.8 02/07/09 0216 ts Selenium ND ugIL 5.0 E200.8 02/07/09 0216 ts Silver ND ug/L 10 E200.8 02/07/09 0216 ts Thallium ND ug/L 0.50 E200.8 02/07/09 0216 ts Tin ND ug/L 100 E200.8 02/07/09 0216/ts Uranium 17.9 ugIL 0.30 E200.8 02/07/09 0216 ts Vanadium ND ug/L 15 E200.8 02/07/09 0216 ts Zinc 75 ugIL 10 E200.8 02/07/09 0216 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 1.4 pCi/L E900.1 02/18/09 1227/cgr Gross Alpha minus Rn Precision 0.4 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.l 02/18/09 1227/cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERGVLABORA TORIES INC 2393 Sail Creek Hhway 82601 P0 Box 3258 Casper WY82602 Tall Free 888.235.0515 307235.0515 Fax 307234.1639 caspercilenergy/a/zcom wwwenergy/ab.com LABORATORY ANALYTICAL REPORT Report Date 03/05/09 Collection Date 02/02/09 1117 DateReceived 02/05/09 Matrix Aqueous EIERGY LABORATORIES Client Denison Mines USA Corp Project Lab ID Client Sample ID MW 20 MCL/ Analyses Result Units Qualifier RL QCL Method Analysis Date By DATA QUALITY NC Balance Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 meq/L meq/L mg/L ND ug/L ND ugiL ND ug/L ND ug/L ND ugiL ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 117 %REC 121 %REC 122 %REC 118 %REC 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-1 20 70-1 30 80-120 80-1 20 Calculation Calculation Calculation Calculation Calculation SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B 5W8260B SW8260B 02/23/09 1046 kbh 02/23/09 1046 kbh 02/23/09 1046/kbh 02/23/09 1046 kbh 02/23/09 1046 kbh MCL Maximum contaminant level ND Not detected at the reporting limit 1st Quarter Groundwater C09020234-001 Anions Cations Solids Total Dissolved Calculated TDS Balance 0.80-1.20 VOLATILE ORGANIC COMPOUNDS -1.23 81.7 79.7 5560 1.04 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02106/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen 02/06/09 2226 wen Report RL Analyte reporting limit Definitions QCL Quality control limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENSRGY LABORA TORIES Client Project Lab ID Client Sample ID ENERGYLABORA TORIES INC 2393 Sail Creek HIbway 82601 P0 Box 3258 Caspe WY82602 Toll Free 886235.0515 307235.0515 Far 307234.1639 casper6energylab.com wwwenergy/ab.com LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 03/05/09 1st Quarter Groundwater Collection Date 02/02/09 1027 C09020234-002 DateReceived 02/05/09 MW 22 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1428/IjI Bicarbonate as HCO3 467 mg/L A2320 02/09/09 1428 IjI Calcium 418 mg/L 0.50 E200.7 02/11/092134/rdw Chloride 54 mg/L A4500-Cl 02/09/09 1402 sp Fluoride 3.1 mg/L 0.1 A4500-F 02/10/09 1150 ljl Magnesium 965 mg/L 0.50 E200.7 02/11/09 2134 rdw Nitrogen Ammonia as 0.62 mg/L 0.05 A4500-NH3 02/12/09 1152 jal Nitrogen NitrateNitrite as 3.6 mg/L 0.1 E353.2 02/11/09 1014 /jal Potassium 22.2 mg/L 2.0 E200.7 02/11/09 2134 rdw Sodium 233 mg/L 0.50 E200.7 02/11/09 2134 rdw Sulfate 5240 mg/L 60 A4500-S04 02/09/09 1633 sp PHYSICAL PROPERTIES pH 6.23 s.u 0.01 A4500-H 02/05/09 1541 /dd Solids Total Dissolved TDS 180 7920 mg/L 10 A2540 02/06/09 1343 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0223 ts Beryllium 3.17 ug/L 0.50 E200.8 02/07/09 0223/ts Cadmium 94.6 ug/L 0.50 E200.8 02/07/09 0223 ts Chromium ND ug/L 25 E200.8 02/07/09 0223 ts Cobalt 293 ug/L 10 E200.8 02/07/09 0223 ts Copper 19 ug/L 10 E200.8 02/07/09 0223 ts Iron ND ug/L 30 E200.7 02/11/09 2134/rdw Lead 1.2 ug/L 1.0 E200.8 02/07/09 0223 ts Manganese 33300 ug/L 10 E200.8 02/07/09 0223 ts Mercury ND ug/L 0.50 E200.8 02/18/09 1659 ts Molybdenum 516 ug/L 10 E200.8 02/07/09 0223 ts Nickel 144 ug/L 20 E200.8 02/07/09 0223 ts Selenium 12.6 ug/L 5.0 E200.8 02/07/09 0223 ts Silver ND ug/L 10 E200.8 02/07/09 0223 ts Thallium 1.02 ug/L 0.50 E200.8 02/07/09 0223 ts Tin ND ug/L 100 E200.8 02/07/09 0223 ts Uranium 49.7 ug/L 0.30 E200.8 02/07/09 0223 ts Vanadium ND ug/L 15 E200.8 02/07/09 0223 ts Zinc 591 ug/L 10 E200.8 02/07/09 0223 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 5.5 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn Precision 0.7 pCi/L E900.1 02/18/09 12.27 /cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227 /cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERGYLABORA TORIES INC P2393 Sail Creek Hiqhway 82601 PO Sax 3258 Caspec WY82602 Toil Free 888.235.0515 307.235.0515 Fax 3072341639 caspeitenergy/ab.com www.energylab.comEIERGY LASORA TOP/ES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/02/09 1027 Lab ID C09020234-002 DateReceived 02/05/09 Client Sample ID MW 22 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By DATA QUALITY A/C Balance -3.34 Calculation 02/23/09 1046 kbh Anions 119 meq/L Calculation 02/23/09 1046 kbh Cations 111 meqL Calculation 02/23/09 1046 kbh Solids Total Dissolved Calculated 7190 mg/L Calculation 02/23/09 1046 kbh TDS Balance 0.80-1.20 1.10 Calculation 02/23/09 1046/kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/06/09 2305 wen Benzene ND ug/L 1.0 SWB26OB 02/06/09 2305 wen Carbon tetrachloride ND ugL 1.0 SW8260B 02/06/09 2305/wen Chloroform ND ug/L 1.0 5W82608 02/06/09 2305 wen Chloromethane ND ug/L 1.0 5W5260B 02/06/09 2305 wen Methyl ethyl ketone ND ugL 20 SW8260B 02/06/09 2305 wen Methylene chloride ND ug/L 1.0 5W6260B 02/06/09 2305 wen Naphthalene ND ug/L 1.0 5W8260B 02/06/09 2305 wen Toluene ND ug/L 1.0 SW8260B 02/06/09 2305 wen Xylenes Total ND ug/L 1.0 SW8260B 02/06/09 2305 wen Surr 12-Dichlorobenzene-d4 116 %REC 80-120 SW8260B 02/06/09 2305/wen Surr Dibromofluoromethane 125 %REC 70-130 SW8260B 02/06/09 2305 wen Surr p-Bromofluorobenzene 122 %REC 80-120 SW8260B 02/06/09 2305 wen Surr Toluene-d8 116 %REC 80-1 20 5W8260B 02/06/09 2305 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERGYLABORA TORIES INC 2393 Sail Creek Hiqhway 82601 P0 Box 3258 Casper WY82502 ____________Toll Free 888235 0515 307235.0515 Fax 307234.1639 casperenergy/ab.conr wwwenergy/ab.com LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/24/09 Project 1st Quarter Groundwater 2009 Collection Date 02/11109 1614 Lab ID C09020538-004 DateReceived 02/13/09 Client Sample ID MW-23 Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/17/09 1235/ljl Bicarbonate as HCO3 209 mgiL A2320 02/17/09 1235/Ijl Calcium 435 mg/L 0.5 E200.7 02/25/09 2213 /rdw Chloride mg/L A4500-Cl 02/27/09 1226 isp Fluoride 0.2 mg/L 0.1 A4500-F 02/18/09 1405 ljl Magnesium 156 mg/L 0.5 E200.7 02/25/09 2213 rdw Nitrogen Ammonia as ND mg/L 0.05 A4500-NH3 03/04/09 0912 /jal Nitrogen NitratetNitrite as 0.3 mgiL 0.1 E353.2 02/18/09 1258 /jal Potassium 13.0 mg/L 0.5 E200.7 02/25/09 2213/rdw Sodium 364 mg/L 0.5 E200.7 02/25/09 2213 rdw Sulfate 2310 mg/L 30 A4500-504 02/24/09 1421 sp PHYSICAL PROPERTIES pH 6.74 s.u 0.01 A4500-H 02/13/09 1516/dd Solids Total Dissolved TDS 180 3610 mg/L 10 A2540 02/17/09 12141 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/26/09 2202 sml Beryllium ND ugIL 0.50 E200.8 02/26/09 2202 smi Cadmium ND ug/L 0.50 E200.8 02/26/09 2202/sml Chromium ND ug/L 25 E200.8 02/26/09 2202 sml Cobalt ND ug/L 10 E200.8 02/26/09 2202 smi Copper ND ug/L 10 E200.8 02/26/09 2202 /sml Iron ND ug/L 30 E200.7 02/25/092213 rdw Lead ND ug/L 1.0 E200.8 02/26/092202 sml Manganese 526 ug/L 10 E200.8 02/26/09 2202 sml Mercury ND ug/L 0.50 E200.8 02/26/09 2202 smi Molybdenum ND ug/L 10 E200.8 02/26/09 2202/sml Nickel 22 ug/L 20 E200.8 02/26/09 2202 sml Selenium ND ug/L 5.0 E200.8 02/26/09 2202 sml Silver ND ug/L 10 E200.8 02/26/09 2202 sml Tin ND ug/L 100 E200.8 02/26/09 2202 sml Uranium 19.4 ug/L 0.30 E200.8 02/26/09 2202 sml Vanadium ND ug/L 15 E200.8 02/26/09 2202 sml Zinc 50 ug/L 10 E200.8 02/26/09 2202 sml RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 3.8 pCi/L E900.1 03/04/09 1301 cgr Gross Alpha minus Rn Precision 0.8 pCi/L E900.1 03/04/09 1301 cgr Gross Alpha minus Rn MDC 0.5 pCi/L E900.1 03/04/09 1301 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERGYLASORA TORIES INC 2393 Sail CreekH1fqhway 82601 P0 Box 3258 Casprn WY82502 ____________Toil Free 888.235.0515 307235.0515 Fax 307234.1639 caspeitenergy/ab.com www.energylab.com LABORATORIES Client Project Lab ID Client Sample ID MW-23 LABORATORY ANALYTICAL REPORT Report Date 03/24/09 Collection Date 02/11/09 1614 Date Received 02/13/09 Matrix Aqueous DATA QUALITY NC Balance Anions Cations Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 meq/L meq/L mglL ND ugIL ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ugJL ND ug/L ND ug/L ND ug/L 114 %REC 124 %REC 128 %REC 115 %REC 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-1 30 80-120 80-1 20 Calculation Calculation Calculation Calculation Calculation SW8260B SW8260B SW8260B SW82603 SW82603 SW8260B 5W8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW8260B 03/02/09 0920 kbh 03/02/09 0920 kbh 03/02/09 0920/ kbh 03/02/09 0920 kbh 03/02/09 0920 kbh Report RL Analyte reporting limit Definitions QCL Quality control limit MCL Maximum contaminant level ND Not detected at the reporting limit Denison Mines USA Corp 1st Quarter Groundwater 2009 C09020538-004 MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By -1.02 51.7 50.7 3410 1.06 Solids Total Dissolved Calculated TDS Balance 0.80-1.20 VOLATILE ORGANIC COMPOUNDS 02/14/09 0655 wen 02/14/09 0655 wen 02/14/09 0655 /wen 02/14/09 0655 wen 02/14/09 0655/wen 02/14/09 0655 wen 02/14/09 0655 wen 02/14/09 0655/wen 02/14/09 0655 wen 02/14/09 0655 wen 02/14/09 0655/wen 02/14/09 0655 wen 02/14/090655 /wen 02/14/090655 /wen Spike recovery outside of advisory limits ENERG VLABORA TORIES INC -2393 Salt Creek Hq/i way 82601 20 Box 3258 Caspei WY82602 ____________To//Free 888235.0515 307235.0515 Fax 3072341639 casperenergy/ab.cocn-wwwenergylab.com LAIJORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23109 Project 1st Quarter Groundwater Collection Date 02/05/09 0810 Lab ID C09020267-005 DateReceived 02/06/09 Client Sample ID MW 24 Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1652 IJI Bicarbonate as HCO3 231 mg/L A2320 02109/09 1652 Iji Calcium 466 mg/L 0.5 E200.7 02/13/091504 lrdw Chloride 44 mgIL A4500-Cl 02/09/09 1425 /sp Fluoride 0.1 mg/L 0.1 A4500-FC 02/10/09 1242/ljl Magnesium 164 mg/L 0.5 E200.7 02/1 3/09 1504 rdw Nitrogen Ammonia as 0.34 mg/L 0.05 A4500-Nl-43 02/12/09 1222 /jal Nitrogen NitrateNitrite as 0.1 mg/L 0.1 E353.2 02/11/09 1052 /jal Potassium 14 mg/L E200.7 02/11/09 2316 rdw Sodium 538 mg/L 0.5 E200.7 02111/09 2316 rdw Sulfate 2630 mg/L 30 A4500-S04 02/10/09 1315 sp PHYSICAL PROPERTIES p1-I 6.83 s.u 0.01 A4500-l-I 02/06/09 1336 dd Solids Total Dissolved TDS 180 4310 mg/L 10 A2540 02/06/09 1348 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/13/09 1949 ts Beryllium ND ug/L 0.50 E200.8 02/13/09 1949 ts Cadmium ND ug/L 0.50 E200.8 02/13/09 1949 ts Chromium ND ug/L 25 E200.8 02/13/09 1949/ts Cobalt ND ug/L 10 E200.8 02/13/09 1949/ts Copper ND ug/L 10 E200.8 02/13/09 1949/ts Iron 1590 ug/L 30 E200.7 02113/09 1504 rdw Lead ND ug/L 1.0 E200.8 02/13/09 1949 ts Manganese 4180 ug/L 10 E200.8 02/13/09 1949 ts Mercury ND ug/L 0.50 E200.8 02/17/09 1424/sml Molybdenum ND ug/L 10 E200.8 02/13/09 1949/ts Nickel ND ug/L 20 E200.8 02/13/09 1949 ts Selenium 11.4 ug/L 5.0 E200.8 02/13/09 1949/ts Silver ND ug/L 10 E200.8 02/17/09 1424/sml Thallium ND ug/L 0.50 E200.8 02/13/09 1949/ts Tin ND ug/L 100 E200.8 02/13/09 1949/ts Uranium 1.07 ug/L 0.30 E200.8 02/13/09 1949/ts Vanadium ND ug/L 15 E200.8 02/13/09 1949/ts Zinc 37 ug/L 10 E200.8 02/13/09 1949 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 1.4 pCi/L E900 03/02109 1226 cgr Gross Alpha minus Rn Precision 0.4 pCiIL E900.1 03/02/09 1228 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 03/02/09 1228 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERO YLABORA TORIES INC 2393 Sail Creek Hfq/iway 82601 PU Box 3258 Caspec WV82602 Toll Free 888235.0515 307235.0515 Fax 307234.1539 casperenergylacom wwwenergy/ab.com LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corn Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/05/09 0810 Lab ID C09020267-005 DateReceived 02/06/09 Client Sample ID MW 24 Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By DATA QUALITY A/C Balance 0.508 Calculation 02/23/09 1051 kbh Anions 59.9 meq/L Calculation 02/23/09 105 kbh Cations 60.5 meq/L Calculation 02/23/09 1051 kbh Solids Total Dissolved Calculated 3970 mgIL Calculation 02/23/09 1051 kbh TDS Balance 0.80 20 1.09 Calculation 02/23/09 1051 kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 5W8260B 02/09/09 1933/wen Benzene ND ug/L 1.0 SW8260B 02109/09 1933/wen Carbon tetrachioride ND ug/L 1.0 SW8260B 02/09/091933 /wen Chloroform ND ug/L 1.0 5W8260B 02/09/09 1933 wen Chloromethane ND ug/L 1.0 SW8260B 02/09/09 1933 wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/09/09 1933 wen Methylene chloride ND ug/L 1.0 SW8260B 02/09/09 1933 wen Naphthalene ND ug/L 1.0 5W8260B 02/09/09 1933 wen Toluene ND ug/L 1.0 5W8260B 02/09/09 1933 wen Xylenes Total ND ug/L 1.0 SW8260B 02/09/09 1933 wen Surr 12-Dichlorobenzene-d4 115 %REC 80-120 SW8260B 02/09/09 1933/wen Surr Dibromofluoromethane 113 %REC 70-1 30 5W8260B 02/09/09 1933 wen Surr p-Bromofluorobenzene 117 %REC 80-1 20 SW8260B 02/09/09 1933 wen Surr Toluene-d8 117 %REC 80-120 SW8260B 02/09/09 1933 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERGVLA SOfiA TORIES INC 2393 Sail Creek Hihway 82601 AC Box 3258 Caspe WY82502 Tall Free 888.235 0515 3072350515 Fax 307234.1539 caspeflllenergy/ab.cam wn.energy/ab.comEIERGY LORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/03/09 1637 Lab ID C09020234-003 DateReceived 02/05/09 Client Sample ID MW 25 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 NO mg/L A2320 02/09/09 1435 ljl Bicarbonate as HCO3 392 mg/L A2320 02/09/09 1435 Ijl Calcium 331 mg/L 0.50 E200.7 02/111092139 rdw Chloride 31 mgL A4500-Cl 02/09/09 1405 sp Fluoride 0.4 mg/L 0.1 A4500-F 02/10/09 11531 IjI Magnesium 116 mg/L 0.50 E200.7 02111/09 2139 rdw Nitrogen Ammonia as 0.36 mgL 0.05 A4500-NH3 02/12/09 1154 jal Nitrogen NitrateNitrite as NO mg/L 0.1 E353.2 02/11/09 1017 /jal Potassium 8.4 mg/L 1.0 E200.7 02111109 2139 rdw Sodium 255 mg/L 0.50 E200.7 02/11/09 2139 rdw Sulfate 1630 mg/L 30 A4500-S04 02/09/09 1638 Isp PHYSICAL PROPERTIES pH 6.88 s.u 0.01 A4500-H 02/05/09 1543/ dd Solids Total Dissolved 105 180 2750 mgL 10 A2540 02/06/09 1343 /ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0229 ts Beryllium ND ugL 0.50 E200.8 02/07/09 0229 ts Cadmium 1.37 ug/L 0.50 E200.8 02/07/09 0229 ts Chromium ND ug/L 25 E200.8 02/07/09 0229 ts Cobalt ND ug/L 10 E200.8 02/07/09 0229 ts Copper NO ugL 10 E200.8 02/07/09 0229 ts Iron NO ug/L 30 E200.7 02/11092139/rdw Lead 1.7 ug/L 1.0 E200.8 02/07/09 0229 ts Manganese 1640 ug/L 10 E200.8 02/07/09 0229 ts Mercury ND ug/L 0.50 E200.8 02/07/09 0229 ts Molybdenum 11 ug/L 10 E200.8 02/07/09 0229 ts Nickel NO ug/L 20 E200.8 02/07/09 0229 ts Selenium NO ug/L 5.0 E200.8 02/07/09 0229 ts Silver NO ug/L 10 E200.8 02/07/09 0229 ts Thallium 0.92 ug/L 0.50 E200.8 02/07/09 0229ts Tin NO ug/L 100 E200.8 02107/09 0229 ts Uranium 5.87 ug/L 0.30 E200.8 02/07/09 0229 ts Vanadium ND ugL 15 E200.8 02/07/09 0229/ts Zinc 30 ug/L 10 E200.8 02/07/09 0229 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 1.3 pCiL E900 02/18/09 1227 cgr Gross Alpha minus Rn Precision 0.4 pCiIL E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900 02/18/09 1227 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit NO Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference EISERCY .AORA TORIES ENEROYLABORA TORIES INC 2393 Salt CreekHihway 8260 EQ Sax 3258 Caspei WY82602 Tall Free 888.235.0515 3072350515 Fa 307234.1639 casperenergy/ab.com nw.energyfab.cam LABORATORY ANALYTICAL REPORT Client Project Lab ID Client Sample ID Denison Mines USA Corp 1st Quarter Groundwater C09020234-003 MW 25 Report Date 03/05/09 Collection Date 02/03/09 1637 DateReceived 02105109 Matrix Aqueous DATA QUALITY Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 -4.93 41.2 meq/L 37.4 meq/L 2570 mg/L 1.07 Calculation 02/23/09 1046 kbh Calculation 02/23/09 1046/kbh Calculation 02/23/09 1046 kbh Calculation 02/23/09 1046 kbh Calculation 02/23/09 1046 kbh Report RL Analyte reporting limit Definitions QCL Quality control limit MDC Minimum detectable concentration MCL Maximum contaminant level ND Not detected at the reporting limit Analyses Result Units Qualifier RL MCL/ QCL A/C Balance Anions Cations Solids Total Dissolved Calculated TDS Balance 0.80 1.20 VOLATILE ORGANIC COMPOUNDS Method Analysis Date By ND ug/L 20 SW8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343 wen ND ug/L 20 SW8260B 02/06/09 2343 wen ND ug/L 1.0 5W8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343 wen ND ug/L 1.0 SW8260B 02/06/09 2343/wan 113 %REC 80-120 SW8260B 02/06/09 2343 wen 115 %REC 70-130 SW8260B 02/06/092343/wen 121 %REC 80-120 SW8260B 02/06/09 2343 wen 115 %REC 80-1 20 SW8260B 02/06/092343 wen Spike recovery outside of advisory limits ENEROVLASORA TORIES INC 2393 Sail Creek HIghway 8260 .20 Sax 3258 Caspa WY82602 Toil Free 888.235.0515 307235.0515 Fax 307234.1639 casperc4energy/ab.com www.energylab.comEIERCY LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/02/09 1450 Lab ID C09020234004 DateReceived 02/05/09 Client Sample ID MW 26 Matrix Aqueous MCL/ Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1442/ljl Bicarbonate as I-1C03 392 mg/L A2320 02/09/09 1442 Iji Calcium 484 mg/L 0.50 E200.7 02/11/09 2144 rdw Chloride 49 mg/L A4500-Cl 02/09/09 1406 sp Fluoride 0.3 mg/L 0.1 A4500-F 02/10/09 1156 ljl Magnesium 162 mgL 0.50 E200.7 02/11/09 2144 rdw Nitrogen Ammonia as 0.19 mg/L 0.05 A4500-NH3 02/12/09 1156 /jal Nitrogen NitrateNitrite as 0.3 mg/L 0.1 E353.2 02/11/09 1019/jal Potassium 9.8 mg/L 1.0 E200.7 02/11/092144/rdw Sodium 177 mg/L 0.50 E200.7 02/11/092144 rdw Sulfate 1880 mg/L 30 A4500-504 02/09/09 1641 sp PHYSICAL PROPERTIES pH 7.06 s.u 0.01 A4500-H 02/05/09 1547 dd Solids Total Dissolved TDS 180 3260 mg/L 10 A2540 02/06/09 1344 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0236 ts Beryllium ND ug/L 0.50 E200.8 02/07/09 0236 ts Cadmium ND ug/L 0.50 E200.8 02/07/09 0236 ts Chromium ND ug/L 25 E200.8 02/07/09 0236 ts Cobalt ND ug/L 10 E200.8 02/07/09 0236 ts Copper ND ug/L 10 E200.8 02/07/09 0236/ts Iron 513 ug/L 30 E200.7 02/11/092144/rdw Lead ND ug/L 1.0 E200.8 02/07/09 0236 ts Manganese 1370 ug/L 10 E200.8 02/07/09 0236 ts Mercury ND ug/L 0.50 E200.8 02/07/09 0236 ts Molybdenum ND ug/L 10 E200.8 02/07/09 0236 ts Nickel ND ug/L 20 E200.8 02/07/09 0236 ts Selenium ND ug/L 5.0 E200.8 02/07/09 0236 ts Silver ND ug/L 10 E200.8 02/07/09 0236 ts Thallium ND ug/L 0.50 E200.8 02/07/09 0236 ts Tin ND ug/L 100 E200.8 02/07/09 0236 ts Uranium 43.0 ug/L 0.30 E200.8 02/07/09 0236 ts Vanadium ND ug/L 15 E200.8 02/07/09 0236/ts Zinc 20 ug/L 10 E200.8 02/07/09 0236 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 3.9 pCi/L E900.1 02/18/09 1227 cgr Cross Alpha minus Rn Precision 0.6 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference EIERGY LABORA TORIES ENERGVLASORA TORIES INC 2393 Salt CreekHIbway 82601 P0 Box 3258 Caspai kVY82602 Toll Free 888.235 0515 307235.0515 Fax 307.234.1639 caspeitenergylab.com wwwenergylab.com LABORATORY ANALYTICAL REPORT Client Project Lab ID Client Sample ID Denison Mines USA Corp 1st Quarter Groundwater C09020234-004 MW 26 Report Date 03/05/09 Collection Date 02/02/09 1450 DateReceived 02/05/09 Matrix Aqueous DATA QUALITY NC Balance meq/L meq/L mg/L Calculation Calculation Calculation Calculation Calculation 02/23/09 1047 kbh 02/23/09 1047 kbh 02/23/09 1047/kbh 02/23/09 1047 kbh 02/23/09 1047 kbh Report RL Analyte reporting limit Definitions QCL Quality control limit MDC Minimum detectable concentration MCL Maximum contaminant level ND Not detected at the reporting limit Spike recovery outside of advisory limits MCL/ Analyses Result Units Qualifier RL QCL Method Analysis Date By Anions Cations Solids Total Dissolved Calculated TDS Balance 0.80 1.20 VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 -1.64 46.9 45.4 2970 1.10 ND ND ND 1600 ND ND 89 ND ND ND 114 112 126 116 ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC 100 5.0 5.0 100 5.0 100 5.0 5.0 5.0 5.0 80-120 70-1 30 80-120 80-1 20 SW8260B SW8260B SW8260B 5W8260B SW8260B SW8260B SW8260B SW8260B SW8260B SW826OB 5W8260B SW8260B SW8260B 5W8260B 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0021 /wen 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen 02/01/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen 02/07/09 0448 wen ENERGYLASORATORIESPC 2393 Sail CreekH1fqhway 82501 AO Sex 32 Caspei VvY82602 ____________Tell Free 8882350515 3072 US Fax 307234.1639 casper@energy/aLice/wwenergy/ab.cam .LASO/ATOJ/ES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/11/09 Project 1st Quarter Groundwater Collection Date 02/16/09 1102 Lab ID C09020662-002 DateReceived 02118/09 Client Sample ID MW-27 Matrix Aqueous MCL Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02119/09 1755 lIJI Bicarbonate as HCO3 436 mgL A2320 0211 9109 1755 IJI Calcium 181 mg/L 0.50 E200.7 03/05/09 2014 rdw Chloride 41 mg/L A4500-Cl 02/27/09 1230 Isp Fluoride 0.7 mg/I.0.1 A4500-F 02/23/09 1152 IjI Magnesium 82.2 mgL 0.50 E200.7 03/05/09 2014 rdw Nitrogen Ammonia as ND mgIL 0.05 A4500-NH3 03/04109 0930 Ijal Nitrogen NitratetNitrite as 5.7 mg/I 0.2 E353.2 02/25/09 1338 /jal Potassium 4.82 mg/I 0.50 E200.7 03/05/092014 rdw Sodium 77.9 mg/L 0.50 E200.7 03/05/09 2014 rdw Sulfate 442 mg/I A4500-504 02/26/09 1343 Ijal PHYSICAL PROPERTIES pH 7.42 s.u 0.01 A4500-H 0211 8/09 1522 dd Solids Total Dissolved TDS 180 1150 mg/I 10 A2540 02119/09 1406 ab METALS DISSOLVED Arsenic ND ug/t 5.0 E200.8 02/20/09 1822/ts Beryllium ND ugIL 0.50 E200.8 02/24/09 0331 ts Cadmium ND ug/I 0.50 E200.8 02/20/09 1822 Its Chromium ND ug/L 25 E200.8 02/20/09 1822 Its Cobalt ND ug/L 10 E200.8 02/20/09 1822/ts Copper ND ug/L 10 E200.8 02/20/09 1822 ts Iron ND ug/L 30 E200.7 03/05/09 2014 rdw Lead ND ug/L 1.0 E200.8 02120/09 1822 /ts Manganese ND ug/I 10 E200.8 02/20/09 1822 ts Mercury ND ug/L 0.50 E200.8 02/20/09 1822 ts Molybdenum ND ug/L 10 E200.8 02120/09 1822 ts Nickel ND ug/L 20 E200.8 02/20/09 1822 Its Selenium 11.8 ug/I 5.0 E200.8 02/20/09 1822 Its Silver ND ug/I 10 E200.8 02/20/09 1822 Its Thallium ND ug/L 0.50 E200.8 02/20/09 1822 Its Tin ND ug/I 100 E200.8 02/20/09 1822 Its Uranium 30.9 ug/I 0.30 E200.8 02/20/09 1822 Its Vanadium ND ug/L 15 E200.8 02/20/09 1822 ts Zinc ND ug/L 10 E200.8 02/20/09 1822 ts RADIONUCLI DES DISSOLVED Gross Alpha minus Rn 2.4 pCi/L E900 03/06/09 1648/cgr Gross Alpha minus Rn Precision 0.6 pCiIL E900.1 03/08/09 1648 cgr Gross Alpha minus Rn MDC 0.4 pCi/L E900.1 03/06/09 1648 cgr Report RI Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference El/ERG VL14SOR4 TORIES fAIf 2393 Salt Creak/-Ihway 8250 EQ 8ox32r Caspet WY82602 To//Free 888235.0515 30Z2 115 Pa 30Z234 1639 casparr4enecgy/ab.co/vwenergy/ab.com LABORATORIES LABORATORY ANALYTICAL REPORT Client Denisori Mines USA Corp Report Date 03/11/09 Project 1st Quarter Groundwater Collection Date 02/16/09 1102 Lab ID C09020662-002 DateReceived 02118/09 Client Sample ID MW-27 Matrix Aqueous MCLI Analyses Result Units Qualifiers RL QCL Method Analysis Date By DATA QUALITY NC Balance 3.67 Calculation 03109/09 1047/ kbh Anions 17.9 meqL Calculation 03/09/09 1047 kbh Cations 19.3 meqL Calculation 03/09/09 1047 kbh Solids Total Dissolved Calculated 1090 mg/L Calculation 03/09/09 1041/kIm TDS Balance 0.80-1.20 1.06 Calculation 03/09109 1047/kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/25/09 0110 wen Benzene ND ugL 1.0 SW8260B 02/25/09 0110 wen Carbon tetrachtoride ND ug/L 1.0 5W8260B 02/25/09 0110/wen Chloroform ND ugL 1.0 SW82608 02/25/09 0110 wen Chioromethane ND ugL 1.0 SWS26OB 02/25/09 0110 wen Methyl ethyl ketone ND ugL 20 5W8260B 02/25/09 0110/wen Methylene chloride ND ugIL 1.0 SW8260B 02/25/09 0110/wen Naphthalene ND ug/L 1.0 SW8260B 02/25/09 0110/wen Toluene ND ugL 1.0 SW8260B 02/25/09 0110/wen Xylenes Total ND ugL 1.0 5W8260B 02/25/09 0110 wen Surr 2-Dichlorobenzene-d4 112 %REC 80-120 SW8260B 02/25/09 0110 wen Surr Dibromofluoromethane 113 %REC 70-130 5W82605 02/25/09 0110 wen Surr p-Brcmofluorobenzene 117 %REC 80-1 20 SW8260B 02/25/09 0110 wen Sum Toluene-d8 108 %REC 80-120 SW82606 02/25/09 0110/wen Report RL Analyte reporting limit MCL Maximum contaminant level DefinItions QCL Quality control limit ND Not detected at the repcrting limit ENERGYLABORA TORIES INC 2393 Sail Creek Hiq/iway 5260 P0 Box 3255 Caspei WY82502 ____________Toil Free 588235 0515 307235.0515 Fax 307234.1539 caspeitenergy/ab.com www.energylab.com LASORA roR/Es LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/04/09 1612 Lab ID C09020267-004 DateReceived 02/06/09 Client Sample ID MW 28 Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1827 Iji Bicarbonate as HCO3 154 mg/L A2320 02/09/09 1627 Iji Calcium 479 mg/L 0.5 E200.7 02/17/09 1631 rdw Chloride 91 mg/L A4500-Cl 02/09/09 1422 sp Fluoride 0.6 mg/L 0.1 A4500-F 02/10/09 1239/IjI Magnesium 157 mg/L 0.5 E200.7 02/17/09 1631 rdw Nitrogen Ammonia as 0.05 mg/L 0.05 A4500-NH3 02/12/09 1220 /jal Nitrogen NitrateNitrite as 0.2 mg/L 0.1 E353.2 02/11/09 1049 /jal Potassium 11 mg/L E200.7 02/11/09 2312 rdw Sodium 286 mg/L 0.5 E200.7 02/11/09 2312 rdw Sulfate 2340 mg/I 60 A4500-S04 02/10/09 1312 sp PHYSICAL PROPERTIES pH 6.38 s.u 0.01 A4500-H 02/06/09 1333 dd Solids Total Dissolved TDS 180 3730 mg/L 10 A2540 02/06/09 1348 ab METALS DISSOLVED Arsenic 12.1 ug/L 5.0 E200.8 02/13/09 1807/ts Beryllium ND ug/L 0.50 E200.8 02/13/09 1807 ts Cadmium 3.66 ug/L 0.50 E200.8 02/13/09 1807 ts Chromium ND ug/L 25 E200.8 02/13/09 1807 /ts Cobalt 28 ug/L 10 E200.8 02/13/09 1807 /ts Copper ND ug/L 10 E200.8 02/13/09 1807 /ts Iron ND ug/L 30 E200.7 02/17/09 1631 /rdw Lead ND ug/L 1.0 E200.8 02/13/09 1807/ts Manganese 1500 ug/L 10 E200.8 02/13/09 1807 ts Mercury ND ug/L 0.50 E200.8 02/18/09 1754/ts Molybdenum ND ug/L 10 E200.8 02/18/09 1754/ts Nickel ND ug/L 20 E200.8 02/13/09 1807/ts Selenium 10.8 ug/L 5.0 E200.8 02/13/09 1807 ts Silver ND ug/L 10 E200.8 02/13/09 1807 /ts Thallium 1.08 ug/L 0.50 E200.8 02/13/09 1807/ts Tin ND ug/L 100 E200.8 02/13/09 1807/ts Uranium 3.42 ug/L 0.30 E200.8 02/13/09 1807 ts Vanadium ND ug/L 15 E200.8 02/13/09 1807 /ts Zinc 79 ug/L 10 E200.8 02/13/09 1807/ts RADIONIJCLIDES DISSOLVED Gross Alpha minus Rn 1.7 pCi/L E900.1 03/02/09 1228 cqr Gross Alpha minus Rn Precision 0.5 pCi/I E900.1 03/02/09 1228 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 03/02/09 1228 cgr Report RL Analyte reporting limit MCI Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERGVLASORA TORIES INC 2393 Sail Creek /-fq/7way 82601 20 Box 3258 Caspec WY82602 Th//Free 888.2350515 307235.0515 Fax 307234.1639 casperc9energy/ab.com www energy/abeam LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/04/09 1612 Lab ID C09020267-004 DateReceived 02/06/09 Client Sample ID MW 28 MatrIx Aqueous MCLJ Analyses Result Units Qualifiers RL OCt Method Analysis Date By DATA QUALITY NC Balance -4.07 Calculation 02/23/09 1051 kbh Anions 53.7 meq/L Calculation 02/23/09 1051 kbh Cations 49.5 meq/L Calculation 02/23/09 1051 kbh Solids Total Dissolved Calculated 3450 mg/L Calculation 02/23/09 1051 kbh 108 Balance 0.80-1.20 1.08 Calculation 02/23/09 1051 kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 5W8260B 02/09/09 1855 wen Benzene ND ug/L 1.0 SW8260B 02/09/09 1855/wen Carbon tetrachioride ND ug/L 1.0 5W8260B 02/09/09 1855 wen Chloroform ND ug/L 1.0 5W8260B 02109/09 1855 wen Chioromethane ND ug/L 1.0 SW8260B 02/09/09 1855 wen Methyl ethyl ketone ND ug/L 20 5W8260B 02/09/09 1855 wen Methylene chloride ND ug/L 1.0 5W8260B 02/09/09 1855 wen Naphthalene ND ug/L 1.0 SWB26OB 02/09/09 1855 wen Toluene ND ug/L 1.0 5W82608 02/09/09 1655 wen Xylenes Total ND ug/L 1.0 5W8260B 02/09/09 1855 wen Surr 12-Dichlorobenzene-d4 118 %REC 80-120 5W8260B 02/09/09 1855/wen Surr Dibromotluoromethane 123 %REC 70-130 SW8260B 02/09/09 1855/wen Surr p-Bromofluorobenzene 119 %REC 80-120 5W8260B 02/09/09 1855/wen Sum Toluene-d8 116 %REC 80-120 SW8260B 02/09/09 1855/wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERO VLABORA TORIES INC 2393 Sail CreekHihway 82601 P0 Box 3258 Caspe WV82602 Toil Free 8882350515 3072350515 Fax 307.234.1839 casperenergy/ab.com wwwenergy/ab.comENERGY LABORA TORiES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/03/09 1151 Lab ID C09020234-005 DateReceived 02/05/09 Client Sample ID MW 29 Matrix Aqueous MCL/ Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1449/IjI Bicarbonate as l-1C03 331 mgIL A2320 02/09/09 1449/IjI Calcium 508 mgIL 0.50 E200.7 02/17/09 1534 rdw Chloride 31 mg/L A4500-Cl 02/09/09 1407 Isp Fluoride 0.8 mgIL 0.1 A4500-F 02/10/09 1159/IjI Magnesium 228 mg/L 0.50 E200.7 02/17/09 1534/rdw Nitrogen Ammonia as 0.59 mg/L 0.05 A4500-NH3 02/12/09 1158 /jal Nitrogen NitrateNitrite as ND mg/L 0.1 E353.2 02/11/09 1022/jal Potassium 13.7 mg/L 1.0 E200.7 02/11/092210 rdw Sodium 377 mg/L 0.50 E200.7 02/11/092210 rdw Sulfate 2710 mg/L 30 A4500-S04 02/09/09 1644/sp PHYSICAL PROPERTIES pH 6.81 s.u 0.01 A4500-H 02/05/09 1549/dd Solids Total Dissolved TDS 180 4180 mg/L 10 A2540 02/06/09 1344 /ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0243 /ts Beryllium ND ug/L 0.50 E200.8 02/07/09 0243 /ts Cadmium ND ug/L 0.50 E200.8 02/07/09 0243 /ts Chromium ND ug/L 25 E200.8 02/07/09 0243 /ts Cobalt ND ug/L 10 E200.8 02/07/09 0243 ts Copper ND ug/L 10 E200.8 02/07/09 0243 /ts Iron 1460 ug/L 30 E200.7 02/17/09 1534 rdw Lead ND ug/L 1.0 E200.8 02/07/09 0243 ts Manganese 5140 ug/L 10 E200.8 02/07/09 0243 ts Mercury ND ug/L 0.50 E200.8 02/18/09 1706/ts Molybdenum ND ug/L 10 E200.8 02/07/09 0243 /ts Nickel ND ug/L 20 E200.8 02/07/09 0243 ts Selenium ND ug/L 5.0 E200.8 02/07/09 0243 ts Silver ND ug/L 10 E200.8 02/07/09 0243 ts Thallium ND ug/L 0.50 E200.8 02/07/09 0243 ts Tin ND ug/L 100 E200.8 02/07/09 0243 ts Uranium 10.7 ug/L 0.30 E200.8 02/07/09 0243 ts Vanadium ND ug/L 15 E200.8 02/07/09 0243 ts Zinc 40 ug/L 10 E200.8 02/07/09 0243 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 1.7 pCi/L E900.1 02/18/09 1227/cgr Gross Alpha minus Rn Precision 0.4 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227/cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERGYLASORA TORIES INC 2393 Sail CreekHiqbway 8260 P0 Box 3258 Casper WV82602 Toil Free 888235.0515 307.235.0515 Fai 307.234.1539 casperenergy/ab.com www.energytab.com LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/03/09 1151 Lab ID C09020234-005 DateReceived 02/05/09 Client Sample ID MW 29 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By DATA QUALITY NC Balance -1.48 Calculation 02/23/09 1047 kbh Anions 62.7 meq/L Calculation 02/23/09 1047 kbh Cations 60.9 meq/L Calculation 02/23/09 1047/kbh Solids Total Dissolved Calculated 4050 mgL Calculation 02/23/09 1047 kbh TDS Balance 0.80 1.20 1.03 Calculation 02/23/09 1047 kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ugL 20 SW8260B 02/07/09 0059 wen Benzene ND ug/L 1.0 5W8260B 02/07/09 0059 wen Carbon tetrachloride ND ug/L 1.0 5W82605 02/07/09 0059 wen Chloroform ND ugiL 1.0 5W8260B 02/07/09 0059 wen Chloromethane ND ug/L 1.0 5W8260B 02/07/09 0059 wen Methyl ethyl ketone ND ug/L 20 5W8260B 02/07/09 0059 wen Methylene chloride ND ugL 1.0 5W8260B 02/07/09 0059 wen Naphthalene ND ugL 1.0 5W8260B 02/07/09 0059 wen Toluene ND ugL 1.0 SW8260B 02/07/09 0059 wen Xylenes Total ND ug/L 1.0 5W8260B 02/07/09 0059 wen Surr 2-Dichlorobenzene-d4 115 %REC 80-120 5W8260B 02/07/09 0059 wen Surr Dibromofluoromethane 118 %REC 70-130 5W82608 02/07/09 0059 wen Surr p-Bromofluorobenzene 120 %REC 80-120 5W8260B 02/07/09 0059 wen Surr Toluene-d8 117 %REC 80-1 20 5W8260B 02/07/090059 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration EIERGY LABORA TORIES EIERGY LARORA TORIES Client Project Lab ID Client Sample ID ENEROVLI4BORA TORIES INC 2393 Sail Creek HIbway 82501 20 Sex 3258 Caspe WY82602 Tell Free 888.235 0515 307235.0515 Fav 3072341639 caspenPenergy/ab.cem wwwenergy/ab.coin LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 03/05/09 1st Quarter Groundwater Collection Date 02/03/09 1002 C09020234-006 DateReceived 02105/09 MW 30 Matrix Aqueous MCL/ Analyses Result Units Qualifier Rt QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1455 IJI Bicarbonate as HCO3 185 mg/L A2320 02/09/09 1455 ljl Calcium 268 mg/L 0.50 E200.7 02/17/09 1554/rdw Chloride 113 mg/L A4500-Cl 02/09/09 1411/sp Fluoride 0.4 mg/L 0.1 A4500-F 02/10/09 1202 IJI Magnesium 67.3 mg/L 0.50 E200.7 02/17/09 1554 rdw Nitrogen Ammonia as ND mg/L 0.05 A4500-NH3 02/12/09 1206 /jal Nitrogen NitrateNitrite as 15.3 mg/L 0.2 E353.2 02/11/09 1032/jal Potassium 6.9 mg/L 1.0 E200.7 02/11/092214 rdw Sodium 99.7 mg/L 0.50 E200.7 02/11/09 2214 rdw Sulfate 795 mg/L 10 A4500-S04 02/09/09 1549 sp PHYSICAL PROPERTIES pH 7.21 s.u 0.01 A4500-H 02/05/09 1553 dd Solids Total Dissolved TDS 180 1640 mg/L 10 A2540 02/06/09 1344 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0331 ts Beryllium ND ug/L 0.50 E200.8 02/07/09 0331 ts Cadmium ND ug/L 0.50 E200.8 02/07/09 0331 ts Chromium ND ug/L 25 E200.8 02/07/09 0331 /ts Cobalt ND ug/L 10 E200.8 02/07/09 0331 ts Copper ND ug/L 10 E200.8 02/07/09 0331 ts Iron ND ug/L 30 E200.7 02/17/09 1554 rdw Lead ND ug/L 1.0 E200.8 02/07/09 0331 /ts Manganese 47 ug/L 10 E200.8 02/07/09 0331 /ts Mercury ND ug/L 0.50 E200.8 02/07/09 0331 ts Molybdenum ND ug/L 10 E200.8 02/07/09 0331 ts Nickel ND ug/L 20 E200.8 02/07/09 0331 ts Selenium 32.0 ug/L 5.0 E200.8 02/07/09 0331 ts Silver ND ug/L 10 E200.8 02/07/09 0331 /ts Thallium ND ug/L 0.50 E200.8 02/07/09 0331 ts Tin ND ug/L 100 E200.8 02/07/09 0331 ts Uranium 6.67 ug/L 0.30 E200.8 02/07/09 0331 ts Vanadium ND ug/L 15 E200.8 02/07/09 0331 ts Zinc 24 ug/L 10 E200.8 02/07/09 0331 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 0.7 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn Precision 0.3 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference EIERGY LASORA TORIES ENERGYLASORA TORIES INC 2393 Sail Creek HIbway 82501 P0 Box 3258 Caspei WV82602 Toll Free 888.2350515 307.235.0515 Far 307234.1639 caspenlleRergylat.coni www.energyfab.com LABORATORY ANALYTICAL REPORT Denison Mines USA Corp Report Date 03/05/09 1st Quarter Groundwater Collection Date 02/03/09 1002 C09020234-006 DateReceived 02/05/09 Matrix Aqueous Client Project Lab ID Client Sample ID MW 30 MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By DATA QUALITY NC Balance -0.965 Calculation 02/23/09 1048/kbh Anions 23.9 meq/L Calculation 02/23/09 1048 kbh Cations 23.4 meq/L Calculation 02/23/09 1048 kbh Solids Total Dissolved Calculated 1530 mg/L Calculation 02/23/09 1048 kbh TDS Balance 0.80-1.20 1.07 Calculation 02/23/09 1048/kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/07/09 0137 wen Benzene ND ug/L 1.0 5W8260B 02/07/09 0137 wen Carbon tetrachloride ND ug/L 1.0 5W8260B 02/07/09 0137 wen Chloroform ND ug/L 1.0 SW8260B 02/07/09 0137 wen Chioromethane ND ug/L 1.0 SW8260B 02/07/09 0137 wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/07/09 0137 wen Methylene chloride ND ug/L 1.0 SW8260B 02/07/09 0137 wen Naphthalene ND ug/L 1.0 SW8260B 02/07/09 0137 wen Toluene ND ug/L 1.0 SW8260B 02/07/09 0137 wen Xylenes Total ND ug/L 1.0 SW8260B 02107/09 0137 wen Surr 2-Dichlorobenzene-d4 114 %REC 80-120 SW8260B 02/07/09 0137 wen Surr Dibromofluoromethane 114 %REC 70-130 SW8260B 02/07/09 0137 wen Surr p-Bromofluorobenzene 125 %REC 80-120 SW8260B 02/07/09 0137 wen Surr Toluene-d8 117 %REC 80-120 SW8260B 02/07/09 0137/wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERO YLABORA TORIES INC p2393 Sail Creek Hiqbway 82601 RO Box 3258 CaspeI WY82602 To/I Free 888.235.0515 307235.0515 Far 307234.1639 casperenergy/ab.com wwwenergy/ab.comEIERGY LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/03/09 1417 Lab ID C09020234-007 DateReceived 02/05/09 Client Sample ID MW 31 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 NO mgL A2320 02/09/09 1509 IjI Bicarbonate as HCO3 205 mgL A2320 02/09/09 1509 IjI Calcium 169 mgL 0.50 E200.7 02/17/09 1558 rdw Chloride 115 mgL A4500-Cl 02/09/09 1412 sp Fluoride 0.9 mg/L 0.1 A4500-F 02/10/09 1205/IjI Magnesium 80.1 mg/L 0.50 E200.7 02/17/09 1558 rdw Nitrogen Ammonia as NO mg/L 0.05 A4500-NH3 02/12/09 1208 jal Nitrogen NitrateNitrite as 23.4 mg/L 0.2 E353.2 02/11/09 1034/jal Potassium 5.4 mg/L 1.0 E200.7 02/11/09 2219/rdw Sodium 82.8 mg/L 0.50 E200.7 02/11/09 2219 rdw Sulfate 488 mg/L 10 A4500-504 02/09/09 1652 sp PHYSICAL PROPERTIES pH 7.59 s.u 0.01 A4500-H 02/05/09 1601 dd Solids Total Dissolved TOS 180 1210 mg/L 10 A2540 02/06/09 1344 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0337 ts Beryllium NO ug/L 0.50 E200.8 02/07/09 0337 ts Cadmium NO ug/L 0.50 E200.8 02/07/09 0337 ts Chromium NO ug/L 25 E200.8 02/07/09 0337 ts Cobalt ND ug/L 10 E200.8 02/07/09 0337 ts Copper ND ug/L 10 E200.8 02/07/09 0337 ts Iron NO ug/L 30 E200.7 02/17/09 1558 rdw Lead ND ug/L 1.0 E200.8 02/07/09 0337 ts Manganese ND ug/L 10 E200.8 02/07/09 0337 ts Mercury ND ug/L 0.50 E200.8 02/07/09 0337 ts Molybdenum ND ug/L 10 E200.8 02/07/09 0337 ts Nickel NO ug/L 20 E200.8 02/07/09 0337 ts Selenium 55.6 ug/L 5.0 E200.8 02/07/09 0337 ts Silver ND ug/L 10 E200.8 02/07/09 0337 ts Thallium NO ug/L 0.50 E200.8 02/07/09 0337 ts Tin NO ug/L 100 E200.8 02/07/09 0337 ts Uranium 7.08 ug/L 0.30 E200.8 02/07/09 0337 ts Vanadium ND ug/L 15 E200.8 02/07/09 0337 ts Zinc ND ug/L 10 E200.8 02/07/09 0337 ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 1.1 pCi/L E900 02/18/09 1227 cgr Gross Alpha minus Rn Precision 0.4 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227/cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit NO Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERG VLASORA TORIES INC 2393 Sail Creek Hibway 82601 AC Sax 3258 Caspe4c PVY82602 Ta/I Free 888.235.0515 307235.0515 Fax 307234.1639 caspeitenergylab.cam wvwenergylab.com LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/03/09 1417 Lab ID C09020234-007 DateReceived 02/05/09 Client Sample ID MW 31 Matrix Aqueous MCU Analyses Result Units Qualifier RL QCL Method Analysis Date By DATA QUALITY A/C Balance 0.798 Calculation 02/23/09 1048 kbh Anions 18.5 meq/L Calculation 02/23/09 1048 kbh Cations 18.8 meq/L Calculation 02/23/09 1048 kbh Solids Total Dissolved Calculated 1160 mg/L Calculation 02/23/09 1048/kbh TDS Balance 0.80 1.20 1.04 Calculation 02/23/09 1048 kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/07/09 0216/wen Benzene ND ug/L 1.0 SW8260B 02/07/09 0216/wen Carbon tetrachloride ND ug/L 1.0 SW8260B 02/07/09 0216 wen Chloroform ND ug/L 1.0 5W8260B 02/07/09 0216 /wen Chloromethane ND ug/L 1.0 SW8260B 02/07/09 0216 wen Methyl ethyl ketone ND ug/L 20 SW82609 02/07/09 0216 wen Methylene chloride ND ug/L 1.0 SW8260B 02/0709 0216 /wen Naphthalene ND ug/L 1.0 SW8260B 02/07/09 0216 wen Toluene ND ug/L 1.0 SW82606 02/07/09 0216 wen Xylenes Total ND ug/L 1.0 SW8260B 02/07/09 0216/wen Surr 12-Dichlorobenzene-d4 114 %REC 80-1 20 SW8260B 02/07/09 0216 /wen Surr Dibromofluoromethane 117 %REC 70-130 SW8260B 02/07/09 0216 wen Surr p-Bromofluorobenzene 123 %REC 80-120 SW8260B 02/07/09 0216 wen Sum Toluene-d8 115 %REC 80-120 SW8260B 02/07/09 0216 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits EIERGY LABORATORIES ENERO VLABORA TORIES INC 2393 Sail Creek Hbway 82601 P0 Box 3258 Caspe1c WY82602 Toil Free 888.235.0515 307.235.0515 Fa 307234.1639 casperenergyIab.com www.energylab.comEPERGY LASORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/02/09 1352 Lab ID C09020234-008 DateReceived 02/05/09 Client Sample ID MW 32 Matrix Aqueous MCLJ Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1516 IJI Bicarbonate as HCO3 419 mg/L A2320 02109/09 1516/IjI Calcium 527 mg/L 0.50 E200.7 02/17/09 1603/rdw Chloride 29 mg/L A4500-Cl 02/09/09 1414 sp Fluoride 0.2 mg/L 0.1 A4500-F 02/10/09 1206 ljl Magnesium 232 mg/L 0.50 E200.7 0217/09 1603 rdw Nitrogen Ammonia as 0.63 mg/L 0.05 A4500-NH3 0212/09 1210 /jal Nitrogen NitrateNitrite as ND mg/L 0.1 E353.2 02/11/09 1037 /jal Potassium 14.3 mg/L 1.0 E200.7 02/11/09 2233 rdw Sodium 234 mg/L 0.50 E200.7 02/1109 2233 rdw Sulfate 2340 mg/L 60 A4500-504 02/0909 1705 sp PHYSICAL PROPERTIES pH 6.72 s.u 0.01 A4500-H 02/05/09 1604 dd Solids Total Dissolved TDS 180 3510 mg/L 10 A2540 02/06/09 1345 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0344 ts Beryllium ND ug/L 0.50 E200.8 02/07/09 0344 ts Cadmium 2.98 ug/L 0.50 E200.8 02/07/09 0344 ts Chromium ND ug/L 25 E200.8 02/07/09 0344 ts Cobalt 49 ug/L 10 E200.8 02/07/09 0344 ts Copper ND ug/L 10 E200.8 02/07/09 0344 ts Iron 9180 ug/L 30 E200.7 02/17/09 1603 rdw Lead ND ug/L 1.0 E200.8 02/07/09 0344 ts Manganese 5170 ug/L 10 E200.8 02/07/09 0344 ts Mercury ND ug/L 0.50 E200.8 02/07/09 0344 ts Molybdenum 11 ug/L 10 E200.8 02/07/09 0344 ts Nickel 63 ug/L 20 E200.8 02/07/09 0344 ts Selenium ND ug/L 5.0 E200.8 02/07/09 0344 ts Silver ND ug/L 10 E200.8 02/07/09 0344 ts Thallium ND ug/L 0.50 E200.8 02/07/09 0344 ts Tin ND ug/L 100 E200.8 02/07/090344 ts Uranium 2.53 ug/L 0.30 E200.8 02/07/09 0344 ts Vanadium ND ug/L 15 E200.8 02/07/09 0344/ts Zinc 163 ug/L 10 E200.6 02/07/09 0344 /ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 5.5 pCi/L E900.1 02/18/09 1227/cgr Gross Alpha minus Rn Precision 0.7 pCi/L E900.1 0218/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference EIERGY LfyqRA TORIES ENERGYLASORA TORIES INC 2393 Sail Creek Hihway 82601 P0 Box 3258 Caspec WY82602 Toil Free 888.235.0515 307.235.0515 Fax 307234.1639 casperenergyIab.com www energy/atz corn LABORATORY ANALYTICAL REPORT Client Project Lab ID Client Sample ID Denison Mines USA Corp 1st Quarter Groundwater C09020234-008 MW 32 Report Date 03105109 Collection Date 02/02/09 1352 DateReceived 02/05/09 Matrix Aqueous VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 ND ug/L ND ugiL ND ug/L ND ug/L ND ugiL ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 114 %REC 120 %REC 124 %REC 117 %REC 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-1 20 70-1 30 80-120 80-1 20 5W8260B SW8260B SW8260B SW8260B 5W8260B SW8260B SW8260B 5W8260B 5W8260B SW8260B SW8260B SW8260B SW8260B SW8260B Report RL Analyte reporting limit Definitions DCL Quality control limit MCL Maximum contaminant level ND Not detected at the reporting limit Analyses Result Units DATA QUALITY NC Balance Anions Cations Solids Total Dissolved Calculated TDS Balance 0.80-1.20 MCLJ Qualifier RL QCL Method Analysis Date By -0.438 56.5 56.0 3600 0.980 meq/L meq/L mgL Calculation Calculation Calculation Calculation Calculation 02/23/09 1048 kbh 02/23/09 1048 kbh 02/23/09 1048 kbh 02/23/09 1048/kbh 02/23/09 1048 kbh 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen 02/07/09 0254 wen MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERGYLABORA TORIES INC 2393 Sell Creek Hi.qbway 82601 20 Box 3258 Caspei WY82602 Toll Free 888.235 0515 307235.0515 Fax 307234.1639 casperenergy/ab.coni www energylab cornEIERGY LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/05/09 0715 Lab ID C09020267-006 DateReceived 02/06/09 Client Sample ID MW 60 Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02/09/09 1656/IjI Bicarbonate as HCO3 mg/L A2320 02109/09 1656 IJI Calcium 0.9 mg/L 0.5 E200.7 02/13/09 1509/rdw Chloride ND mg/L A4500-Cl 02/09/09 1433 sp Fluoride 0.1 mg/L A4500-F 02/10/09 1245/ljl Magnesium ND mgIL 0.5 E200.7 02/13/09 1509 /rdw Nitrogen Ammonia as ND mg/L 0.05 A4500-NH3 02/12/09 1225 /jal Nitrogen NitrateNitriteas ND mg/L 0.1 E353.2 02/11/09 1054 /jal Potassium ND mgIL 0.5 E200.7 02/11/09 2321 rdw Sodium ND mg/L 0.5 E200.7 02/11/09 2321 rdw Sulfate mg/L A4500-504 02/10/09 1317 /sp PHYSICAL PROPERTIES pH 7.71 s.u 0.01 A4500-H 02/06/09 1337 dd Solids Total Dissolved TDS 180 24 mg/L 10 A2540 02/06/09 1349/ ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 0211 3/09 1955 ts Beryllium ND ug/L 0.50 E200.8 02/13/09 1955 Its Cadmium ND ug/L 0.50 E200.8 0211 3/09 1955 /ts Chromium ND ug/L 25 E200.8 02/13/09 1955 ts Cobalt ND ugIL 10 E200.8 0211 3/09 1955 Its Copper ND ug/L 10 E200.8 0211 3/09 1955 /ts Iron 49 ug/L 30 E200.7 02113/091509/rdw Lead ND ug/L 1.0 E200.8 02113/09 1955 ts Manganese ND ug/L 10 E200.8 02/13/09 1955 ts Mercury ND ug/L 0.50 E200.8 02/13109 1955 Its Molybdenum ND ug/L 10 E200.8 0211 3/09 1955 /ts Nickel ND ug/L 20 E200.8 02/13/09 1955 ts Selenium ND ug/L 5.0 E200.8 02/13/09 1955 /ts Silver ND ug/L 10 E200.8 02/1709 1437 sml Thallium ND ug/L 0.50 E200.8 02/13/09 1955/ts Tin ND ug/L 100 E200.8 02/13/09 1955 Its Uranium ND ug/L 0.30 E200.8 02/13/09 1955 /ts Vanadium ND ug/L 15 E200.8 02/13/09 1955 Its Zinc ND ug/L 10 E200.8 02/13/09 1955 Its RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 0.9 pCi/L E900.1 03/02/09 1228 cgr Gross Alpha minus Rn Precision 0.4 pCi/L E900.1 03/02/09 1228 cgr Gross Alpha minus Rn MDC 0.3 pCiIL E900.1 03/02/09 1228/cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGYLABORA mR/ES INC 2393 Salt Creek Highway 82501 P0 Box 3258W Caspei WY82502 To//Free 888.235.0515 307235.0515 Fax 307234.1639 caspeOenergy/ab.conr wwwenergy/ab.com LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/05/09 0715 Lab ID C09020267006 DateReceived 02/06/09 Client Sample ID MW 60 Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By DATA QUALITY NC Balance 6.93 Calculation 02/23/09 1327/kbh Anions 0.0649 meq/L Calculation 02/23/091327 /kbh Cations 0.0745 meq/L Calculation 02/23/09 1327 /kbh The ion balance is not appropriate for near blank results VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW82GOB 02/09/09 2011 wen Benzene ND ug/L 1.0 SWS26OB 02/09/09 2011 wen Carbon telrachloride ND ug/L 1.0 SW8260B 02/09/09 2011 wen Chloroform 20 ug/L 1.0 SW8260B 02/09/09 2011 wen Chloromelhane ND ug/L 1.0 SW8260B 02/09/09 2011 /wen Methyl ethyl ketone ND ug/L 20 5W8260B 02/09/09 2011 wen Methylene chloride 3.5 ug/L 1.0 SW8260B 02/09/09 2011 wen Naphthalene ND ug/L 1.0 SWB26OB 02/09/092011 wen Toluene ND ug/L 1.0 SW8260B 02/09/09 2011 /wen Xylenes Total ND ug/L 1.0 SWB26OB 02/09/09 2011 wen Surr 2-Dichlorobenzene-d4 115 %REC 80-120 SW8260B 02/09/09 2011 wen Surr Dibromofluoromethane 118 %REC 70-130 SW8260B 02/09/09 2011 /wen Surr p-Bromofluorobenzene 118 %REC 80-120 SW8260B 02/09/09 2011 /wen Surr Toluene-d8 115 %REC 80-120 SW8260B 02/09/09 2011 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENERGVLI4BORA TORIES INC 2393 Sail CreekHiq/iway 8260 P0 Box 3258 Casper WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 caspercenergy/ab.com www.energylab.comEIERGY LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/02/09 1352 Lab ID C09020234-009 DateReceived 02/05/09 Client Sample ID MW 65 Matrix Aqueous MCL Analyses Result Units Qualifier RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 ND mg/L A2320 02109/09 1523 Bicarbonate as HCO3 413 mg/L A2320 02/09/09 1523/ljl Calcium 545 mg/L 0.50 E200.7 02117/09 1608 rdw Chloride 28 mg/L A4500-Cl 02/09/09 1416 sp Fluoride 0.2 mg/L 0.1 A4500-F 02/10/09 1211 Iji Magnesium 240 mg/L 0.50 E200.7 02/17/09 1608 rdw Nitrogen Ammonia as 0.61 mg/L 0.05 A4500-NH3 02/12/09 1212 /jal Nitrogen NitrateNitrite as ND mg/L 0.1 E353.2 02/11/09 1039/jal Potassium 14.1 mg/L 1.0 E200.7 02111/092238 rdw Sodium 231 mg/L 0.50 E200.7 02/11/09 2238 rdw Sulfate 2290 mg/L 60 A4500-S04 02/09/09 1707 sp PHYSICAL PROPERTIES pH 6.73 s.u 0.01 A4500-H 02/05/09 1606/dd Solids Total Dissolved TDS 180 3660 mg/L 10 A2540 02106/09 1346 ab METALS DISSOLVED Arsenic ND ug/L 5.0 E200.8 02/07/09 0351 ts Beryllium ND ug/L 0.50 E200.8 02/07/09 0351 ts Cadmium 2.99 ug/L 0.50 E200.8 02/07/09 0351 ts Chromium ND ug/L 25 E200.8 02/07/09 035 ts Cobalt 49 ug/L 10 E200.8 02/07/09 0351 ts Copper ND ug/L 10 E200.8 02/07/09 0351 ts Iron 9350 ug/L 30 E200.7 02/17/09 1608 rdw Lead ND ugIL 1.0 E200.8 02/07/09 0351 ts Manganese 5100 ugL 10 E200.8 02/07/09 0351 Its Mercury ND ug/L 0.50 E200.8 02/07/09 0351 ts Molybdenum 10 ug/L 10 E200.8 02/07/09 0351 ts Nickel 64 ug/L 20 E200.8 02/07/09 0351 ts Selenium ND ugL 5.0 E200.8 02/07/09 0351 ts Silver ND ug/L 10 E200.8 02/07/09 0351 ts Thallium ND ug/L 0.50 E200.8 02/07/09 0351 ts Tin ND ug/L 100 E200.8 02/07/09 0351 ts Uranium 2.59 ug/L 0.30 E200.8 02/07/09 0351 ts Vanadium ND ug/L 15 E200.8 02/07/09 0351 ts Zinc 167 ug/L 10 E200.8 02/07/09 0351 /ts RADIONUCLIDES DISSOLVED Gross Alpha minus Rn 4.0 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn Precision 0.6 pCi/L E900.1 02/18/09 1227 cgr Gross Alpha minus Rn MDC 0.3 pCi/L E900.1 02/18/09 1227 cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference ENERG VLABORA TORIES INC 2393 Sail CreekHibway 82601 P0 Sax 3258 Casper WY82602 Ta//Free 888.235.0515 3072350515 Fax 307.234.1539 caspeitenergy/ab.cam wwwenergy/ab.con LAIJORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/02/09 1352 Lab ID C09020234-009 DateReceived 02/05/09 Client Sample ID MW 65 Matrix Aqueous MCU Analyses Result Units Qualifier RL QCL Method Analysis Date By DATA QUALITY NC Balance 1.88 Calculation 02123/09 1049 kbh Anions 55.3 meq/L Calculation 02/23/09 1049/kbh Cations 57.4 meqlL Calculation 02/23/09 1049/kbh Solids Total Dissolved Calculated 3570 mg/L Calculation 02/23/09 1049 kbh TDS Balance 0.80.1.20 1.03 Calculation 02/23/09 1049/kbh VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 5W82608 02/07/09 03321 wen Benzene ND ug/L 1.0 SW82608 02/07/09 0332 wen Carbon tetrachloride ND ug/L 1.0 SW8260B 02/07/09 0332 wen Chloroform ND ug/L 1.0 5W8260B 02/07/09 0332 wen Chioromethane ND ug/L 1.0 5W8260B 02/07/09 0332 wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/07/09 0332 wen Methylene chloride ND ug/L 1.0 SW8260B 02/07/09 0332 wen Naphthalene ND ug/L 1.0 SW8260B 02/07/09 0332 wen Toluene ND ug/L 1.0 SW8260B 02/07/09 0332 wen Xylenes Total ND ug/L 1.0 5W8260B 02/07/09 03.32 wen Surr 2-Dichlorobenzene-d4 114 %REC 80-120 SW82608 02107/090332/wen Surr Dibromofluoromethane 120 %REC 70-130 5W8260B 02/07/09 0332 wen Surr p-Bromofluorobenzene 122 %REC 80.120 SW8260B 02107/09 0332 wen Surr Toluene-d8 116 %REC 80-120 5W8260B 02/07/090332 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of adviscry limits ENERGYLASORA TORIES IMC 2393 Sail CreekHq/iway 8260 AC Sax 32 Caspec WY82602 ____________roll Free 888.235.0515 3072 115 Fa 307234.1639 casperenergy/ab.coc ww.energylab.com LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/11/09 Project 1st Quarter tiroundwater Collection Date 02/16/09 1322 Lab ID C09020662-003 DateReceived 02118/09 Client Sample ID MW-70 Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By MAJOR IONS Carbonate as C03 mg/I A2320 02/19/09 1809 Iji Bicarbonate as HCO3 357 mg/L A2320 02/19/09 1809/ljl Calcium 40.9 mg/L 0.50 E200.7 03/05/09 2023 rdw Chloride 30 mg/I A4500-CI 02/27/09 1244 sp Fluoride 0.6 mg/L 0.1 A4500-F 02/23/09 1155/IjI Magnesium 11.7 mg/I 0.50 E200.7 03/05/09 2023 rdw Nitrogen Ammonia as 0.58 mg/L 0.05 A4500-NH3 03/04/09 0932 Ijal Nitrogen NitrateNitrite as ND mg/L 0.05 E353.2 02/25/09 1341 /jal Potassium 6.00 mg/I 0.50 E200.7 03/05/09 2023 rdw Sodium 576 mg/I 0.50 E200.7 03/05/09 2023 rdw Sulfate 1040 mg/L 10 A4500-S04 02/26/09 1345 jal PHYSICAL PROPERTIES pH 7.95 s.u 0.01 A4500-H 02/18/09 1526/dd Solids Total Dissolved 103 180 1910 mg/L 10 A2540 02/19/09 1406 ab METALS DISSOLVED Arsenic ND ug/I 5.0 E200.8 02/20/09 1829 ts Beryllium ND ug/I 0.50 E200.8 02/24/09 0338 ts Cadmium ND ug/L 0.50 E200.8 02/20/09 1829ts Chromium ND ug/L 25 E200.8 02/20/09 1829/ts Cobalt ND ug/L 10 E200.8 02/20/09 1829/ts Copper ND ug/L 10 E200.8 02/20/09 1829 ts Iron 110 ug/L 30 E200.7 03/05/09 2023 rdw Lead ND ug/L 1.0 E200.8 02/20/09 1829 /ts Manganese 69 ug/L 10 E200.8 02/20/09 1829ts Mercury ND ug/L 0.50 E200.8 02/20/09 1829 /ts Molybdenum ND ug/L 10 E200.8 02/20/09 1829 Its Nickel ND ug/L 20 E200.8 02/20/09 1829 ts Selenium ND ug/L 5.0 E200.8 02/20/09 1829 ts Silver ND ug/L ID E200.8 02/20/09 1829 /ts Thallium ND ug/L 0.50 E200.8 02/20/09 1829/ts Tin ND ug/L 100 E200.8 02/20/09 1829/ts Uranium ND ug/L 0.30 E200.8 02120/09 1829 ts Vanadium ND ug/L 15 E200.8 02/20/09 1829 ts Zinc ND ugh 10 E200.8 02/20/09 1829 /ts RADIONUCUDES DISSOLVED Gross Alpha minus Rn 1.3 pCi/L E900.1 03/06/09 1648 cgr Gross Alpha minus Rn Precision 0.5 pCi/L E900.1 03106/09 1648/cgr Gross Alpha mInus Rn MDC 0.4 pCi/L E900.1 03/06/09 1648/cgr Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration RL increased due to sample matrix interference El/ERG VLASORA TORIES 4C -2393 Salt Creek Hifl way 82601 PC SoxJ4 Caspe WY82602 ____________Toll Free 888.235.0515 307.2 515 Fa 307234.1639 caspeitenergy/ab.co ivw energy/a/acorn LAsomarornEs LABORATORY ANALYTICAL REPORT Client Project Lab ID Client Sample ID Denison Mines USA Corp 1st Quarter Groundwater C09020662-003 MW-70 Report Date 03/11/09 Collection Date 02116/09 1322 DateReceived 02/18109 Matrix Aqueous DATA QUALITY A/C Balance Anions Cations Solids Total Dissolved Calculated TDS Balance 0.80-1.20 VOLATILE ORGANIC COMPOUNDS meq/L meq/L mg/L Report RL Analyte reporting limit Definitions QCL Quality control limit MCI Maximum contaminant level ND Not detected at the reporting limit MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By -0.459 28.5 28.3 1900 1.01 Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Sum Dibromotluoromethane Surr p-Bromofluorobenzene Sum Toluene-d8 ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ugiL ND ug/L ND ug/L ND ug/L ND ug/L 111 %REC 110 %REC 118 %REC 110 %REC Calculation Calculation Calculation Calculation Calculation 3W8260B SW8260B SW8260B SWB26OB SWS26OB SW8280B SW8260B 8W82608 SW82GOB SW8260B SW8260B SWB26OB SW8260B SW8260B 03/09/09 10471 kbh 03109109 1047 kbh 03/09/09 1047/ kbh 0309/09 1047/ kbh 03/09/09 1047/ kbh 02/25/09 0147/wen 02/25/09 0147 /wen 02/25/09 0147 wen 02/25/09 0147 wen 02/25/09 0147 wen 02/25/09 0147/wen 02/25109 0147/wen 02/25/09 0147 /wen 02/25/09 0147 wen 02/25/09 0147 wen 02/25/09 0147 wen 02/25/09 0147 wen 02/25/09 0147 wen 02/25/09 0147 wen 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-1 20 70-1 30 80-120 80-120 ENERO VLABORA TORIES INC 2393 Sail Creek Hiqbway 82601 P0 Box 3258 Caspe WY82602 Tall Free 888235.0515 307235.0515 Fax 307.234.1639 caspeitenergylab.com wn4cenergy/ab.comEIERGY LASORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date 02/03/09 1637 Lab ID C09020234-01 DateReceived 02/05/09 Client Sample ID Trip Blank Matrix Aqueous MCL/ Analyses Result Units Qualifier RL QCL Method Analysis Date By VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/07/09 0410 wen Benzene ND ug/L 1.0 SW8260B 02/07/09 0410 wen Carbon tetrachloride ND ug/L 1.0 SW8260B 02/07/09 0410 Iwen Chloroform ND ug/L 1.0 SW8260B 02/07/09 0410 /wen Chloromethane ND ug/L 1.0 SW8260B 02/07/09 0410 wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/07/09 0410 wen Methylene chloride ND ug/L 1.0 SW8260B 02/07/09 0410 /wen Naphthalene ND ug/L 1.0 SW8260B 02/07/09 0410 /wen Toluene ND ug/L 1.0 SW8260B 02/07/09 0410 wen Xylenes Total ND ug/L 1.0 SW8260B 02/07/09 0410 wen Surr 2-Dichlorobenzene-d4 113 %REC 80-120 SW8260B 02/07/09 0410 wen Surr Dibromofluoromethane 114 %REC 70-1 30 SW8260B 02/07/09 0410 /wen Surr p-Bromofluorobenzene 124 %REC 80-120 SW8260B 02/07/09 0410 wen Surr Toluene-d8 117 %REC 80-120 SW8260B 02/07/09 0410 wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERGVLJ4SORA TORIES INC 2393 Sail creekHibway 82601 P0 Box 3258 Oaspei WY82602 Toll Free 588.235 0515 307.235.0515 Far 307.234.1639 caspenVenergy/ab.com www.energylab.com LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Collection Date Not Provided Lab ID C09020234-01 DateReceived 02/05/09 Client Sample ID Temp Blank Matrix Aqueous MCLI Analyses Result Units Qualifier RL QCL Method Analysis Date By PHYSICAL PROPERTIES Temperature 3.0 El 70.1 02105109 0930 sec Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit MDC Minimum detectable concentration EIERGY LASORA TORIES ENERGVLABORA TORIES INC 2393 Sail Creek HIq/7way 82501 P0 Box 3258 Caspec WY82502 _____________Toll Free 888.235.0515 307235.0515 Fax 307.234.1539 casperenergy/ab.com www.energylab.com LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Collection Date 02/05/09 0810 Lab ID C09020267-007 DateReceived 02/06/09 Client Sample ID Trip Blank Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/09/09 2049 wen Benzene ND ug/L 1.0 SW8260B 02/09109 2049/wen Carbon tetrachioride ND ug/L 1.0 SW8260B 02/09/09 2049 wen Chloroform ND ug/L 1.0 SW8260B 02/09/09 2049 wen Chioromethane ND ug/L 1.0 SW8260B 02/09/09 2049 wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/09/09 2049 wen Methylene chloride ND ug/L 1.0 5W8260B 02/09/09 2049 wen Naphthalene ND ug/L 1.0 SW82608 02/09/09 2049 wen Toluene ND ug/L 1.0 SW8260B 02/09/09 2049 wen Xylenes Total ND ug/L 1.0 SW8260B 02/09/09 2049 wen Surr 12-Dichlorobenzene-d4 118 %REC 80-120 SW8260B 02/09/09 2049 wen Surr Dibromofluoromethane 126 %REC 70-130 SW8260B 02/09/09 2049 wen Surr p-Bromofluorobenzene 122 %REC 80-120 5W8260B 02/09/09 2049 /wen Surr Toluene-d8 116 %REC 80-120 SW8260B 02/09/092049/wen Report RL Analyte reporting limit MCL- Maximum contaminant level Definitions CCL-Quality control limit ND Not detected at the reporting limit Spike recovery outside of advisory limits ENERGVLABORA TORIES INC 2393 Salt Creek Hiqliway 82601 PC Sax 3258 Caspe WY82602 ____________Tall Free 888.235.0515 307235.0515 Fax 307234.1639 casperenergylaAcanv wwwenergylab.cam LAI3ORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/23109 Project 1st Quarter Groundwater Collection Date Not Provided Lab ID C09020267-00B DateReceived 02/06/09 Client Sample ID Temp Blank Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By PHYSICAL PROPERTIES Temperature 3.0 E170.1 02/06/09 0945/sec Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit ENEROYLABORA TORIES INC P2393 Sail CreekHifqhway 82501 -P0 Box 3258-Caspe WY82502 roll Free 588.235.0515 307235 0515 Far 307.234.1539 casper4energy/ab.com wwwenergy/ab.cornEIERGY LASORA TORIES LABORATORY ANALYTICAL REPORT Client Den ison Mines USA Corp Report Date 03/17/09 Project 1st Quarter Groundwater Collection Date 02/09/09 1040 Lab ID C09020434-005 DateReceived 02/11/09 Client Sample ID Trip Blank Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/12/09 1506/wen Benzene ND ug/L 1.0 5W8260B 02/12/09 1506/wen Carbon tetrachioride ND ug/L 1.0 SW8260B 02/12/09 1506/wen Chloroform ND ug/L 1.0 SW8260B 02/12/09 1506 /wen Chioromethane ND ug/L 1.0 SW82608 02/12/09 1506/wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/12/09 1506/wen Methylene chloride ND ug/L 1.0 SW8260B 02/12/09 1506 /wen Naphthalene ND ug/L 1.0 SW8260B 02/12/09 1506 /wen Toluene ND ug/L 1.0 SW8260B 02/12/09 1506/wen Xylenes Total ND ug/L 1.0 SW8260B 02/12/09 1506/wen Surr 2-Dichlorobenzene-d4 116 %REC 80-120 SW82608 02/12/09 1506/wen Surr Dibromofluoromethane 122 %REC 70-130 SW3260B 02/12/09 1506/wen Surr p-Bromofluorobenzene 127 %REC 80-120 SW8260B 02/12/09 1506 /wen Surr Toluene-dS 115 %REC 80-120 SW8260B 02/12/09 1506/wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit Spike recovery outside of advisory limits ENERGYLASORA TORIES INC 2393 Sail Creek Hihway 82601 P0 Sax 3258 CaspeA WY82602 Ta//Free 888.2350515 307.235.0515 Fax 307.234.1639 casperenergy/ab.cam www.energylab.comElERG LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/17/09 Project 1st Quarter Groundwater Collection Date Not Provided Lab ID C09020434-006 DateReceived 02/11/09 Client Sample ID Temp Blank Matrix Aqueous MCL Analyses Result Units Qualifiers RL QCL Method Analysis Date By PHYSICAL PROPERTIES Temperature 3.0 E170.1 02/11/09 0900/sec Report RL Analyte reporting limit MCL Maximum contaminant level Definitions DCL Quality control limit ND Not detected at the reporting limit ENERGYLABORA TORIES INC 2393 Salt Creek Highway 82601 P0 Box 3258 Caspei WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 casperc9energy/ab.conr www.energylab.com LAa0RA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03124/09 Project 1st Quarter Groundwater 2009 Collection Date 02/11/09 1614 Lab ID C09020538-005 DateReceived 02/13109 Client Sample ID Trip Blank Matrix Aqueous MCL/ Analyses Result Units Qualifiers RL QCL Method Analysis Date By VOLATILE ORGANIC COMPOUNDS Acetone ND ug/L 20 SW8260B 02/14/09 0733 /wen Benzene ND ug/L 1.0 5W8260B 02/14/09 0733 wen Carbon tetrachloride ND ug/L 1.0 SW8260B 02/14/09 0733/wen Chloroform ND ug/L 1.0 SW8260B 02/14/09 0733/wen Chloromethane ND ug/L 1.0 SWS26OB 02/14/09 0733 /wen Methyl ethyl ketone ND ug/L 20 SW8260B 02/14/09 0733/wen Methylene chloride ND ug/L 1.0 SW8260B 02/14/09 0733/wen Naphthalene ND ug/L 1.0 SW8260B 02/14/09 0733/wen Toluene ND ug/L 1.0 SW8260B 02/14/09 0733 wen Xylenes Total ND ug/L 1.0 5W8260B 02/14/09 0733 wen Surr 12-Dichlorobenzene-d4 114 %REC 80-120 SW8260B 02/14/09 0733/wen Surr Dibromouluoromethane 123 %REC 70-130 SW8260B 02/14/09 0733/wen Surr p-Bromofluorobenzene 131 %REC 80-1 20 5W8260B 02/14/09 0733 /wen Surr Toluene-d8 115 %REC 80-120 5W8260B 02/14/09 0733/wen Report RL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit Spike recovery outside of advisory limits ENERGYLASORA TORIES INC 2393 Salt Creek Hiq/iway 82601 20 Sex 5258 Caspe WY82602 ____________Tell Free 888.235.0515 3072350515 Fax 307234.1639 casper4energylab.cetn www.energylab.com LABORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/24109 Project 1st Quarter Groundwater 2009 Collection Date Not Provided Lab ID C09020538-006 DateReceived 02/13109 Client Sample ID Temp Blank Matrix Aqueous MCLJ Analyses Result Units Qualifiers RL QCL Method Analysis Date By PHYSICAL PROPERTIES Temperature 2.0 El 70.1 02/13/09 0930 sec Report RL Analyte reporting limit MOL Maximum contaminant level Definitions QCL Quality control limit ND Net detected at the reporting limit ENERGYLASORA TORIES /C 2393 Sail CreekHiqhway 82601 P0 Box 3250 Caspe WY82602 ____________To//Free 888.235.0515 307.2J 15 Fax 30Z234 1639 casperOenergy/ab.cor ww.energy/ab.corn LASORA TORIES LABORATORY ANALYTICAL REPORT Client Denison Mines USA Corp Report Date 03/11/09 Preject 1st Quarter Groundwater Collection Date 02/16/09 1322 Lab ID C09020662-004 DateReceived 02/18/09 Client Sample ID Trip Blank Matrix Aqueous MCL Analyses Result Units Qualifiers RL QCL Method Analysis Date By VOLAT1LE ORGANIC COMPOUNDS Acetone ND ugL 20 SW8260B 02/21/09 0308/wen Benzene ND ugL 1.0 SW8260B 02/21/09 0308 wen Carbon tetrachloride ND ugL 1.0 SW8260B 02/21/09 0308 wan Chloroform ND ugfL 1.0 SW8250B 02121/09 0308 wen Chloromethane ND ugL 1.0 SW8260B 02/21/09 0308 wen Methyl ethyl ketone ND ug/L 20 5W8260B 02/21/09 0306 won Methylene chloride ND ug/L 1.0 SW82SOB 02/21/09 0306 won Naphthalene ND ug/L 1.0 SWS26OB 02/21/09 0306/won Toluene ND ugh 1.0 5W8260B 02/21/09 0306 wan Xylenes Total ND ug/L 1.0 SW82608 02/21109 0308 wen Surr 2-Dichlorobenzene-d4 113 %REC 80-120 SW82606 02/21/09 0308 wen Surr Dibromofluoromethane 125 %REC 70-130 SW8260B 02/21/09 0308 wen Surr p-Bromofiuorobenzene 124 %REC 80-120 SW82606 021211090308 wen Surr Toluene-d8 108 %REC 80-120 SW8260B 02/21/09 0306 wen Report FIL Analyte reporting limit MCL Maximum contaminant level Definitions QCL Quality control limit ND Not detected at the reporting limit Spike recovery outside of advisory limits ENERO VLABORA TORIES INC 2393 Sail Creek Hqbway 82501 P0 Box 3255 Caspei WY82502 Toll Free 888.235.0515 307235.0515 Far 3O7234.1539 caspercenergy/ab.com www energy/ab cornEIERGY LABORA TORIES March 24 2009 Denison Mines USA Corp 6425 Hwy 191 Blanding UT 84511 ANALYTICAL SUMMARY REPORT Workorder No C09020538 Quote ID C1640 POC Wells Monthly Groundwater Sampling Project Name 1st Quarter Groundwater 2009 Energy Laboratories Inc received the following samples for Denison Mines USA Corp on 2/13/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09020538-001 MW-i 02/11/09 1006 02/i 3/09 C09020538-002 MW-18 02/i 1/09 1222 02/13/09 C09020538-003 MW-19 02/11/09 1432 02/13/09 Aqueous Metals by ICP/ICPMS Dissolved If you have any questions regarding these tests results please call S\taAi Ji4Lt Aqueous Same As Above Aqueous Metals by ICP/ICPMS Dissolved Fluoride Nitrogen Nitrate Nitrite C09020538-004 MW-23 02/i 1/09 1614 02/i 3/09 Aqueous Metals by ICP/ICPMS Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen Ammonia Nitrogen Nitrate Nitrite pH Gross Alpha minus Rn222 and Uranium Solids Total Dissolved Sulfate 5W8260B VOCs Standard List C09020538-005 Trip Blank 02/i 1/09 1614 02/13/09 Aqueous 5W8260B VOCs Standard List C09020538-006 Temp Blank 02/i 3/09 Aqueous Temperature As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QNQC Summary Report or the Case Narrative Report Approved By EIERGY LABORA TORIES Client Denison Mines USA Corn Project 1st Qyarter Groundwater 2009 Analyte Method A2320 Sample ID MBLK-1 Alkalinity Total as CaCO3 Carbonate as C03 Bicarbonate as HCO3 Sample ID LCS-1 Alkalinity Total as CaCO3 Sample ID C09020537-OO4AMS Alkalinity Total as CaCO3 Sample ID C09020537.OO4AMSD Alkalinity Total as CaCO3 Method A2540 Sample ID MBLKI_090217 Solids Total Dissolved TDS 180 Sample ID LCSIfi90217 Solids Total Dissolved TDS 180 Sample ID C09020538-OO4AMS Solids Total Dissolved TDS 180 Sample ID C09020538-OO4AMSD Solids Total Dissolved TDS 180 Method A4500-CI Sample ID LCS35-090227A Chloride Sample ID MBLK36-090227A Chloride Sample ID C09020662-OO2AMS Chloride Sample ID C09020662-OO2AMSD Chloride ND mg/L ND mg/L ND mg/L Laboratory Control Sample 198 mg/L Sample Matrix Spike 269 mg/L Sample Matrix Spike Duplicate 274 mg/L Laboratory Control Sample 3560 mg/L Method Blank ND mg/L Sample Matrix Spike 75.8 mg/L Sample Matrix Spike Duplicate 76.2 mgIL Run MANTECH_090217A 99 90 110 Run MANTECH_09021 7A 98 80 120 Run MANTECH_09021 7A 102 80 120 Run TITRATION 090227A 1.0 101 90 110 Run TITRATION_090227A 0.4 Run TITRATION_090227A 1.0 99 90 110 Run TITRATION_090227A 1.0 100 90 110 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit ENERGYLASORA TORIES INC 2393 Se//Creek Hqhway 82601 P0 Box 3258 Caspec WY82602 To//Free 888.2350515 307235.0515 Fax 307234.1639 casperenergy/ab.coin www.energylab.com QA/QC Summary Report Count Result Units Method Blank Report Date 03/24/09 Work Order C09020538 RL %REC Low Limit High Limit RPD RPDLImit Qual Run MANTECH_09021 7A 0.2 1.0 1.0 1.0 Method Blank ND mg/L Run BAL-1_090217A Laboratory Control Sample 1000 mg/L 10 100 Run BAL-1_090217A 90 110 Sample Matrix Spike 5890 mg/L 10 103 Run BAL-1_090217A 90 110 Sample Matrix Spike Duplicate 5900 mg/L 10 103 Run BAL-1090217A 90 110 Batch R114804 02/17/09 1043 02/17/09 1050 02/17/09 1138 02/17/09 1146 1.6 20 Batch 09021 7_1_SLDS-TDS-W 02/1 7/09 1208 02/17/09 1209 02/17/09 1214 02/17/09 1215 0.2 10 Batch 090227A-CL-TTR-W 02/27/09 1155 02/27/09 1156 02/27/09 1252 02/27/09 1253 0.5 10 Client Denison Mines USA Corn Project 1st Quarter Groundwater 2009 Analyte Method P4500-F Sample ID MBLK-l Fluoride Sample ID LCS-1 Fluoride Sample ID C09020522-O0IAMS Fluoride Sample ID C09020522-00IAMSD Fluoride Method P4500-H Sample ID ICV1_090213_3 pH Method P4500-H Sample ID C09020537-O08ADUP pH Method A4500-NH3 Sample ID MBLK-1 Nitrogen Ammonia as Sample ID LCS-2 Nitrogen Ammonia as Sample ID C09020623-OO1EMS Nitrogen Ammonia as Sample ID C09020623-OO1EMSD Nitrogen Ammonia as Method A4500-S04 Sample ID LCS-1_090224 Sulfate Sample ID MBLK-1_090224 Sulfate Sample ID C09020539-OO2AMS Sulfate Sample ID C09020539-OO2AMSD Sulfate 0.1 Report Date 03/24/09 Work Order C09020538 RL %REC Low Limit High Limit RPD RPDLimit Qual Batch R114877 Run MANTECH_090218A 02/18/09 1250 0.05 Run MANTECH_090218A 02/18/09 1253 0.10 100 90 110 Run MANTECH_090218A 02/18/09 1345 0.10 101 80 120 Run MANTECH_090218A 02/18/09 1348 0.10 101 80 120 10 Analytical Rurt ORION55SA_09021 3C 02/13/09 1441 Batch 09021 3_3_PH-W_555A-1 02/13/09 1512 10 Batch R115462 03/04/09 0906 03/04/09 0908 03/04/09 0920 03/04/09 0922 1.1 20 Batch 090224_1_S04-TURB-W Run TURB-2_090224A 02/24/09 1206 59 103 90 110 Run TURB-2_090224A 02/24/09 1207 0.6 Run TURB-2_090224A 02/24/09 1428 1.0 101 90 110 Run TURB-2_090224A 02/24/09 1431 1.0 102 90 110 0.3 10 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration LAIIORA TORIES ENERO YLASORA TORIES INC 2393 Sail Creek H.fq/iway 82601 P0 Box 3258 Caspei WY82602 ____________Toll Free 888235.0515 307235.0515 Far 307234.1539 casper4energy/ab.com-www.energykb.com QA/QC Summary Report Count Result Units Method Blank ND mg/L Laboratory Control Sample 1.00 mg/L Sample Matrix Spike 2.87 mg/L Sample Matrix Spike Duplicate 2.87 mg/L Initial Calibration Verification Standard 6.87 s.u 0.010 100 98 102 Sample Duplicate Run OR1ON555A090213C 7.62 s.u 0.010 Method Blank ND mg/L 0.02 Run TECHNICON_090304A Laboratory Control Sample 21.5 mg/L 0.20 107 Run TECHNICON_090304A 80 120 Sample Matrix Spike 1.79 mg/L 0.050 85 Run TECHNICON_090304A 80 120 Sample Matrix Spike Duplicate 1.77 mg/L 0.050 84 Run TECHNICON_090304A 80 120 Laboratory Control Sample 4930 mg/L Method Blank ND mg/L Sample Matrix Spike 32.3 mg/L Sample Matrix Spike Duplicate 32.4 mg/L ND Not detected at the reporting limit ENERG YLABORA TORIES INC 2393 Sail Creek HI9/7 way 82601 PC Sex 3258 Casper WY82602 Toil Free 888.235.0515 307235.0515 Fax 307234.1639 casper@energy/ab.cenv wwwenergy/ab.cern LABORA TORIES QA/QC Summary Report Analyte Method E200.7 Sample ID LRB Calcium Iron Magnesium Manganese Sample ID LFB-ICP Calcium Iron Magnesium Manganese Method Blank ND 0.006 ND ND Laboratory Fortified Blank 27.3 mg/L 2.15 mg/L 28.5 mgIL 2.82 mg/L 1.0 0.030 1.0 0.010 1.0 1.0 0.030 1.0 0.0 10 1.0 Run ICP3-Q090225B 109 85 115 110 85 115 114 85 115 113 85 115 Run ICP3-C_090225B 107 70 130 107 70 130 108 70 130 111 70 130 130 70 130 Run ICP3-C_090225B 94 70 130 98 70 130 100 70 130 100 70 130 119 70 130 02/25/09 2159 9.5 20 20 7.7 20 8.7 20 8.8 20 Method E200.8 Sample ID LRB Selenium Thallium Uranium Sample ID LFB Selenium Thallium Uranium Sample ID C09020838-0018M54 Selenium Thallium Uranium Sample ID C09020838-OOIBMSD Selenium Thallium Uranium Method Blank ND ND ND Laboratory Fortified Blank 0.0510 mg/L 0.0492 mg/L 0.0506 mgIL Sample Matrix Spike 0.0579 mg/L 0.0521 mg/L 0.284 mg/L Sample Matrix Spike Duplicate 0.0576 mg/L 0.0535 mg/L 0.280 mg/L Run ICPMS2-C_090225A 102 85 115 98 85 115 101 85 115 Run ICPMS2-C_090225A 103 70 130 104 70 130 70 130 Run ICPMS2-C_090225A 102 70 130 107 70 130 70 130 02/25/09 1624 0.5 20 20 1.3 20 The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated MDC Minimum detectable concentration Client Denison Mines USA Corp Project 1st Quarter Groundwater 2009 Count Result Units Report Date 03/24/09 Work Order C09020538 RL %REC Low Limit High Limit mg/L mg/L mg/L mg/L RPD RPDLimit Qual Run ICP3-C_090225B 0.02 0.0004 0.01 0.001 1.0 0.030 1.0 0.010 Batch R115204 02/25/09 1752 02/25/09 1757 02/25/09 2154SampleIDC09020537-OO7BMS Sample Matrix Spike Calcium 382 mg/L Iron 2.73 mg/L Magnesium 293 mg/L Manganese 3.24 mg/L Potassium 338 mg/L Sample ID C09020537-OO7BMSD Sample Matrix Spike Duplicate Calcium 347 mg/L Iron 2.49 mg/L Magnesium 271 mg/L Manganese 2.97 mg/L Potassium 309 mg/L mg/L mg/L mg/L Run ICPMS2-C_090225A 0.00 3E-05 8E-06 0.0014 0.0010 0.00030 0.0010 0.10 0.00030 0.0010 0.10 0.00030 Batch R115192 02/25/09 1236 02/25/09 1243 02/25/09 1618 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit LASORA TORIES ENERGYLABORA ran/Es INC 2393 Sail Creek H1q/lway 82601 P0 Box 3258 Caspei WY82602LYToilFree 885.235.0515 3072350515 Fax 3072341639 casper4energy/ab.com wwwenergy/ab.com QAIQC Summary Report Client Denison Mines USA Corp Project 1st Quarter Groundwater 2009 Report Date Work Order 03/24/09 C09020538 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Sample ID LRB Method Blank Mercury ND mg/L 4E-05 Run ICPMS4-C_090226A Batch R115265 02/26/09 1531 Sample ID LFB Laboratory Fortified Blank Mercury 0.00520 mg/L 0.0010 104 Run ICPMS4-C_090226A 85 115 02/26/09 1559 Sample ID C09020884-OO2BMS4 Sample Matrix Spike Mercury 0.00532 mg/L 0.0010 104 Run ICPMS4-C_090226A 70 130 02/26/09 2330 Sample ID C09020884-OO2BMSD Sample Matrix Spike Duplicate Mercury 0.00530 mg/L 0.0010 103 Run ICPMS4-C_090226A 70 130 0.4 02/26/09 2337 20 Method E200.8 Batch R115926 Sample ID LRB Method Blank Manganese ND mg/L SE-OS Run ICPMS2-C_090316A 03/16/09 1329 Sample ID LFB Laboratory Fortified Blank Manganese 0.0484 mg/L 0.0010 97 Run ICPMS2-C_090316A 85 115 03/16/09 1335 Sample ID C09020590-OO2BMS4 Sample Matrix Spike Manganese 0.0476 mg/L 0.010 94 Run ICPMS2-C_090316A 70 130 03/16/09 1524 Sample ID C09020590-OO2BMSD Sample Matrix Spike Duplicate Manganese 0.0476 mg/L 0.010 94 Run ICPMS2-C_090316A 70 130 0.1 03/16/09 1536 20 Method E353.2 Batch R114843 Sample ID MBLK-1 Method Blank Nitrogen NitrateNitrite as ND mg/L 0.03 Run TECHNICON_090218A 02/18/09 1208 Sample ID LCS-2 Laboratory Control Sample Nitrogen NitrateNitrite as 2.56 mg/L 0.10 102 Run TECHNICON_090218A 90 110 02/18/09 1211 Sample ID C09020615-OO1DMS Sample Matrix Spike Nitrogen NitrateNitrite as 2.07 mg/L 0.10 103 Run TECI-INICON_090218A 90 110 02/18/09 1303 Sample ID C09020615-OOIDMSD Sample Matrix Spike Duplicate Nitrogen NitrateNitrite as 2.07 mg/L 0.10 103 Run TECHNICON_090218A 90 110 02/18/09 1306 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGVLABORA TORIES INC 2393 Salt Creek Hq/iway 82801 P0 Box 3258-Caspet WY82602 Toll Free 888.235 0515 307235.0515 Fax 307234.1639 caspereI7ergylab.com wwwenergylab.com LABORj1 TORIES QAJQC Summary Report Client Denison Mines USA Corp Report Date 03/24/09 Project 1st Quarter Groundwater 2009 Work Order C09020538 rMaIe Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E900A Batch GA-0216 Sample ID MB-GA-0216 Method Blank Run G5000W_090302A 03/04/09 1301 Gross Alpha minus Rn pCi/L Gross Alpha minus Rn Precision 0.5 pCi/L Gross Alpha minus Rn MDC 0.5 pCi/L Sample ID LCS-GA-0216 Laboratory Control Sample Run G5000W_090302A 03/04/09 1301 Gross Alpha minus Rn 26.8 pCi/L g7 70 130 Sample ID TAP WATER-MS Sample Matrix Spike Run G5000W_090302A 03/04/09 1301 Gross Alpha minus Rn 28.4 pCi/L 90 70 130 Sample ID TAP WATER-MSD Sample Matrix Spike Duplicate Run G5000W_090302A 03/04/09 1301 Gross Alpha minus Rn 24.6 pCi/L 76 70 130 14 24.4 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGYLABORA TORIES INC 2393 Sail Creek Hibway 82601 P0 Box 3255 Caspec WY52602 Toll Free 585.235.0515 3072350515 Fax 307234.1639 casperilenergy/aA corn wwwenergylab.corn LASORA TORIES QAIQC Summary Report Client Denison Mines USA Corp Report Date 03/24109 Project 1st Quarter Groundwater 2009 Work Order C09020538 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method 5W8260B Batch R114770 Sample ID 13-FEBO9LCS_3 Laboratory Control Sample Run GCMS2_090213C 02/13/09 1353 Acetone 110 ug/L 20 111 70 130 Benzene 8.6 ug/L 1.0 86 70 130 Carbon tetrachloride 10 ug/L 1.0 103 70 130 Chloroform 10 ug/L 1.0 104 70 130 Chloromethane 8.5 ug/L 1.0 85 70 130 mp-Xylenes 17 ug/L 1.0 85 70 130 Methyl ethyl ketone 110 ug/L 20 109 70 130 Methylene chloride 11 ug/L 1.0 108 70 130 Naphthalene 7.9 ug/L 1.0 79 70 130 o-Xylene 8.9 ug/L 1.0 89 70 130 Toluene 8.9 ug/L 1.0 89 70 130 Xylenes Total 26 ug/L 1.0 87 70 130 Surr 12-Dichlorobenzene-d4 1.0 114 80 120 Surr Dibromofluoromethane 1.0 122 70 130 Surr p-Bromofluorobenzene 1.0 116 80 130 SurrToluene-d8 1.0 117 80 120 Sample ID 13-FEB-09_MBLK_6 jfi Method Blank Run GCMS2O9O213C 02/13/09 1617 Acetone ND ug/L 20 Benzene ND ug/L 1.0 Carbon tetrachloride ND ug/L 1.0 Chloroform ND ug/L 1.0 Chioromethane ND ug/L 1.0 mp-Xylenes ND ug/L 1.0 Methyl ethyl ketone ND ug/L 20 Methylene chloride ND ug/L 1.0 Naphthalene ND ug/L 1.0 o-Xylene ND ug/L 1.0 Toluene ND ug/L 1.0 Xylenes Total ND ug/L 1.0 Sum 12-Dichlorobenzene-d4 1.0 113 80 120 Surr Dibromofluoromethane 1.0 109 70 130 Surr p-Bromofluorobenzene 1.0 126 80 120 Surr Toluene-d8 1.0 114 80 120 Sample ID C09020521OOIHMS j.j Sample Matrix Spike Run GCMS2_090213C 02/13/09 2201 Benzene 190 ug/L 20 94 70 130 Carbon tetrachloride 220 ug/L 20 108 70 130 Chloroform 230 ug/L 20 115 70 130 mp-Xylenes 200 ug/L 20 100 70 130 o-Xylene 220 ug/L 20 108 70 130 Toluene 210 ug/L 20 107 70 130 Xylenes Total 420 ug/L 20 104 70 130 Surr 12-Dichlorobenzene-d4 20 114 80 120 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERGYLASORA TORIES INC 2393 Sail Creek Hqbway 82601 P0 Box 3258 Casper WY82602 Toil Free 885235 0515 307235.0515 Fa 307234.1639 casperenergyfab.com www.energylab.com LABOR/I TORIES Method SW8Z6OB Sample ID C09020521-OO1HMS Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-dS QAJQC Summary Report Run GCMS2_090213C 02/13/09 2201 20 120 70 130 20 120 80 120 20 117 80 120 Benzene Carbon tetrachioride Chloroform mp-Xylenes o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 210 ug/L 240 ug/L 260 ug/L 170 ug/L 190 ug/L 190 ug/L 360 ug/L 11 20 10 20 11 20 15 20 12 20 12 20 13 20 10 10 10 10 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit Client Denison Mines USA Corp Project 1St Quarter Groundwater 2009 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Batch R114770 Report Date 03/24/09 Work Order C09020538 il Sample Matrix Spike Sample ID C09020521-OOIHMSD jj Sample Matrix Spike Duplicate Run GCMS2_09021 SC 02/13/09 2239 20 106 70 130 20 120 70 130 20 128 70 130 20 87 70 130 20 96 70 130 20 95 70 130 20 91 70 130 20 113 80 120 20 120 70 130 20 119 80 120 20 117 80 120 EP E R C Y Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d Pa g e of _ _ _ PL E A S E PR I N T - Pr o v i d e as mu c h in f o r m a t i o n as no s s i b l e Co m p a n y Na m e lD c n s o n M\ c 3 Pr o j e c t Na m e PW S Pe r m i t Et c ar \ t r cj v n Vl o - c Sa m p l e Or i g i n St a t e uT EP A / S t a t e Co m p l i a n c e Ye s No Re p o r t Ma i l Ad d r e s s Bb X O9 LS I \ In v o i c e Ad d r e s s Co n t a c t Na m e Ph o n e / F a x Em a i l nc r t- 4 1 at ct A k L4 3 5 In v o i c e Co n t a c t Ph o n e Pu r c h a s e Or d e r Sa m p l e r Pl e a s e Pr i n t lZ n n c Qu o t e / B o t t l e Or d e r tY f l - Sp e c i a l R e p o r t / F o r m a t s EL I mu s t be no t i f i e d pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g ow A2 L A GS A El ED D / E D T E l e c t r o n i c Da t a PO T W A N W T P Fo r m a t _ _ _ _ _ _ _ _ St a t e LE V E L IV El Ot h e r NE L A C -Cl rc 5 t5 m I 00oI z1 1 1J i 11 Co n t a c t EL I pr i o r to RU S H sa m p l e su b m i t t a l fo r ch a r g e s an d sc h e d u l i n g - S e e In s t r u c t i o n Pa g e 5f h j by fv 9 / co o l e r ID s i4 ._ Co m m e n t s Tr p d T c r r p fl $ jy Re c e $ T e m p Sc On 19 C m ye N o Cu s t o d y Se a l Bo t t l e s co o l e r s BL C In t a c t Sn a t u r e Ma t c h SA M P L E ID E N T I F I C A T I O N Na m e Lo c a t i o n In t e r v a l et c M- i 2/ j Co l l e c t i o n Da t e -- O QC 4 Co l l e c t i o n Ti m e MA T R I X -U -\ J 3- \ 3\ V - MJ - 3 u- a o c a La __ _ 10 @_ _ _ Ti c i i e a T h 7 pr 1 i i i uÆ i 7 f l m e Sig n a i u r e Cu s t o d y Re l i n q u i s h e d by pr i n t Da t e / T i m e Sig n a z u Re c o r d jt i C f 1L U L L t C\ Re c e i v e d by pr i n t Da t e / T i m e uis h e d by pu n t Da t e / T i m e Sig n a t u r e MU S T be i Re g v p by La b o r a t e r y Da t e / T i m e Si g n e d Sa m p l e Dp o s a I Re t u r n to Cli e n t La b Dis p o s a l /1 u C /9 In ce r t a i n ci r c u m s t a n c e s s a m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s In c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to co m p l e t e th e an a l y s i s re q u e s t e d Th i s s e r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n t r a c t d a t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l r e p o r t Vis i t ou r we b si t e at ww w . e n e r g y l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s Energy Laboratories Inc IIo rko rd Rece rt Ii ec ki st Denison Mines USA Corp C09020538 Login completed by Kimberly F-lumiston Date and Time Received 2/13/2009930 AM Reviewed by Received by pb Reviewed Date Carrier name Next Day Air Shippingcontainer/cooleringoodcondition Yes No fl NotPresent Custody seals intact on shipping container/cooler Yes No Not Present Custody seals intact on sample bottles Yes No fl Not Present Chain of custody present Yes No fl chain of custody signed when relinquished and received Yes No fl Chain of custody agrees with sample labels Yes No Samplesinpropercontainer/bottle Yes No fl Sample containers intact Yes No Sufficient sample volume for indicated test Yes No All samples received within holding time Yes No ContainerlTemp Blank temperature 2C On Ice Water VOA vials have zero headspace Yes 21 No No VOA vials submitted Water-pH acceptable upon receipt Yes No NotApplicable Contact and Corrective Action Comments None ENERGVLASORA TORIES INC 2393 Sail Creek Hiqbway 82501 P0 Box 3258 Caspec WV82502 To//Free 888.235.0515 307235 0515 Far 307234.1539 casper//energy/ab.conr wwwenergy/ab.com LABORA TORIES CLIENT Denison Mines USA Corp Date 24-Mar-09 Project 1st Quarter Groundwater 2009 CASE NARRATIVE Sample Delivery Group C09020538 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method goo.o for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r-Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 0211 8CA Oregon WY200001 Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energylab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT C09020538-004 MW-23 02/11/09 1614 02/13/09 Aqueous Metals by ICP/ICPMS Dissolved Same As Above Metals by ICP/ICPMS Dissolved Fluoride Nitrogen Nitrate Nitrite Metals by ICP/ICPMS Dissolved Alkalinity GA Calculations Chloride Fluoride Nitrogen Ammonia Nitrogen Nitrate Nitrite pH Gross Alpha minus Rn222 and Uranium Solids Total Dissolved Sulfate SW8260B VOCs Standard List C09020538-005 Trip Blank 02/11/09 1614 02/13/09 Aqueous SW8260B VOCs Standard List C09020538-006 Temp Blank 02/13/09 Aqueous Temperature As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QA/QC Summary Report or the Case Narrative If you have any questions regarding these tests results please call Report Approved By tvtic EIERGY LABORATORIES ENERGYLASORA TORIES INC 2393 Sail Creek Hihway 82601 P0 Box 3258 Caspe WY82602 Toll Free 888.235 0515 307235.0515 Fax 307234.1639 casperenergy/ab.com wwwenergy/ab.com ANALYTICAL SUMMARY REPORT April 06 2009 Denison Mines USA Corp 6425 Hwy 191 BlandingUT 84511 Workorder No C09020538 Quote ID C1640 POC Wells Monthly Groundwater Sampling Project Name 1st Quarter Groundwater 2009 Energy Laboratories Inc received the following samples for Denison Mines USA Corp on 2/13/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09020538-001 MW-I 02111/09 I006 02/13/09 Aqueous C09020538-002 MW-18 02/11/09 1222 02/13/09 Aqueous C09020538-003 MW-19 02/11/09 1432 02/13/09 Aqueous Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration EIERGY LASORA TORIES Result Units RL %REC Low Limit High Limit ENERG VLABORA TORIES INC 2393 Sail Crook HIbway 82601 P0 Box 3258 Caspe1c WY82602 To//Free 888.235 0515 307235.0515 Fax 307234.1639 casperanergy/ab.com www.energylab.com QA/QG Summary Report Revised Date 04/06/09 Client Denison Mines USA Corp Report Date 03/24/09 Project 1st Quarter Groundwater 2009 Work Order C09020538 Analyte RPD RPDLimit Qual Method E200.8 Batch R115192 Sample ID LRB Method Blank Run ICPMS2-C_090225A 02/25/09 1236 Manganese ND mg/L 5E-05 Sample ID LFB Laboratory Fortified Blank Run ICPMS2-C_090225A 02/25109 1243 Manganese 0.0486 mg/L 0.0010 97 85 115 Sample ID C09020363-OOIBMS4 Sample Matrix Spike Run ICPMS2-C_090225A 02/25/09 1316 Manganese 0.054 mg/L 0.010 79 70 130 Sample ID C09020363-OOIBMSD4 Sample Matrix Spike Duplicate Run ICPMS2-C_090225A 02/25/09 1323 Manganese 0.053 mg/L 0.010 77 70 130 1.5 20 Sample ID C09020698-OOZBMS4 Sample Matrix Spike Run ICPMS2-C_090225A 02/25/09 2026 Manganese 0.0500 mg/L 0.010 97 70 130 Sample ID C09020698-OO2BMSD4 Sample Matrix Spike Duplicate Run ICPMS2-C_090225A 02/25/09 2035 Manganese 0.0502 mg/L 0.010 97 70 130 0.4 20 ND Not detected at the reporting limit ENERGVLI4BORA TORIES INC 2393 Sail CreekHifl way 82601 P0 Box 3258 Caspe1c WY82602 ____________roll Free 886235.0515 307235 0515 Fax 307234.1639 casperenergy/ab.com -www.energylab.com LASORA TORIES CLIENT Denison Mines USA Corp Date 06-Apr-09 Project 1st Quarter Groundwater 2009 CASE NARRATIVE Sample Delivery Group C09020538 REVISED/SUPPLEMENTAL REPORT The attached analytical report has been revised from previously submitted report due to the addition of Manganese to sample MW 18 -002 per Ryan Palmers voice mail request 4/6/09 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 02118CA Oregon WY200001 Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energyIab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT ENERO VLABORA TORIES INC 2393 Sail Creek H4ihway 8260 RO Sax 3258 Caspe WY82602 ______roil Free 888.235 0515 307235.0515 Fax 307234.1639 casperenergy/ab.oorn wwwenergy/ab.com ANALYTICAL SUMMARY REPORT EfERGY LALIORA TORIES March 172009 Denison Mines USA Corn 6425 Hwy 191 Blanding UT 84511 Workorder No C09020434 Project Name 1st Quarter Groundwater C09020434-003 MW 17 C09020434-004 MW 15 C09020434-005 Trip Blank C09020434-006 Temp Blank 02/09/09 1357 02/11/09 02/09/09 1612 02/11/09 02/09/09 1040 02/11/09 02/11/09 Aqueous Aqueous Aqueous Aqueous Temperature Report Approved By Quote ID C1640 POC Wells/Monthly Groundwater Sampling Energy Laboratories Inc received the following samples for Denison Mines USA Corp on 2/11/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09020434-001 MW 02/09/09 1132 02/11/09 Aqueous C09020434-002 MW 3A 02/09/09 1040 02/11/09 Aqueous Metals by ICP/ICPMS Dissolved Metals by ICP/ICPMS Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen Ammonia Nitrogen Nitrate Nitrite pH Gross Alpha minus Rn222 and Uranium Solids Total Dissolved Sulfate SW8260B VOCs Standard List Metals by ICP/ICPMS Dissolved Same As Above SW8260B VOCs Standard List As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QA/QC Summary Report or the Case Narrative If you have any questions regarding these tests results please call Client Denison Mines USA Corn Project 1st Quarter Groundwater Report Date 03/17/09 Work Order C09020434 RPD RPDLimit Qual ElERG LASORA TORIES ENERGVLAHORA TORIES INC 2393 Sail Creek HIb/zway 82601 AO Sax 3258 Caspet WY82602 rail Free 888.235.0515 307235.0515 Far 307234.1639 casperenergyfab.cam wwwenergy/ab.cam QAJQC Summary Report Count Result Units RL %REC Low Limit High Limit Method P2320 Batch R114751 Sample ID MBLK-1 Method Blank Alkalinity Total as CaCO3 ND mg/L Carbonate as C03 ND mgiL Bicarbonate as HCO3 ND mg/L 0.2 Run MANTECH_090213A 02/13/09 1418 Sample ID LCS-1 Alkalinity Total as CaCO3 Laboratory Control Sample 197 mgIL 1.0 98 Run MANTECH_09021 3A 02/13/09 1426 90 110 Sample ID C09020454-OOIAMS Alkalinity Total as CaCO3 Sample Matrix Spike 507 mg/L 1.0 96 Run MANTECH_090213A 02/13/09 1549 80 120 Sample ID C09020454.OOIAMSD Alkalinity Total as CaCO3 Sample Matrix Spike Duplicate 510 mg/L 1.0 98 Run MANTECft.090213A 02/13/09 1556 80 120 0.6 20 Method P2540 Sample ID MBLK1_090211 Solids Total Dissolved TDS 180 Method Blank ND mg/L Batch 09021 1_1_SLDS-TDS-W Run BAL-1_090211A 02/11/09 1322 Sample ID LCSI_090211 Solids Total Dissolved TDS 180 Laboratory Control Sample 1000 mg/L 10 100 Run BAL-1_090211A 02/11/09 1322 90 110 Sample ID C09020421-OOIAMS Solids Total Dissolved TDS 180 Sample Matrix Spike 2480 mg/L 10 98 Run BAL-1_09021 1A 02/11/09 1326 90 110 Sample ID C09020421-OOIAMSD Solids Total Dissolved TDS 180 Sample Matrix Spike Duplicate 2480 mg/L 10 98 Run BAL-1_090211A 02/11/09 1326 90 110 0.1 10 Method P4500-Cl Batch 090211A-CL-TTR-W Sample ID MBLK9-090211A Chloride Method Blank ND mg/L 0.4 Run TITRATION_090211A 02/11/09 1429 Sample ID C09020434-OO2AMS Chloride Sample Matrix Spike 233 mg/L 1.0 103 Run TITRATION_09021 IA 02/11/09 1607 90 110 Sample ID C09020434.-OO2AMSD Chloride Sample Matrix Spike Duplicate 235 mg/L 1.0 104 Run TITRATION_090211A 02/11/09 1607 90 110 0.8 10 Sample ID LCS3S-090211A Chloride Laboratory Control Sample 3490 mg/L 1.0 99 Run TITRATION_090211A 02/11/09 1609 90 110 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit E/ERGY LARORA TORIES Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte ENERG VLABORA TORIES INC 2393 Sail Creek Hlqbway 82601 P0 Box 3258 Casper WV82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 caspenllenergyla/x corn wwwenergylab.coln QAIQC Summary Report Report Date 03/17/09 Work Order C09020434 Count Result Units RL IOREC Low Limit High Limit RPD RPDLimit Qual Method A4500-F Batch R114664 Sample ID MBLK-1 Fluoride Method Blank ND mg/L 0.05 Run MANTECH_090212A 02/12/09 1208 Sample ID LCS-1 Fluoride Laboratory Control Sample 1.00 mg/L 0.10 100 Run MANTECH_090212A 02/12/09 1211 90 110 Sample ID C09020434-OO2AMS Fluoride Sample Matrix Spike 2.33 mg/L 0.10 88 Run MANTECH_090212A 02/12/09 1310 80 120 Sample ID C09020434-OO2AMSD Fluoride Sample Matrix Spike Duplicate 2.33 mg/L 0.10 88 Run MANTECH_090212A 02/12/09 1313 80 120 10 Method A4500-H Sample ID ICV1_090211_2 pH Initial Calibration Verification Standard 6.89 s.u 0.010 100 Analytical Run ORION55SA_090211B 02/11/09 1244 98 102 Method P4500-H Sample ID C09020436-OOIADUP pH Sample Duplicate 8.12 s.u 0.010 Batch 09021 i_2_PH-W_555A-1 Run 0R10N555A_090211B 02/11/09 1313 10 Method A4500-NH3 Batch Ri 14647 Sample ID MBLK-i Nitrogen Ammonia as NJ Method Blank ND mgiL 0.02 Run TECHNICON_090212A 02/12/09 1146 Sample ID LCS-2 Nitrogen Ammonia as Laboratory Control Sample 19.8 mg/L 0.20 99 Run TECHNlCON_090212A 02/12/09 1148 80 120 Sample ID C09020454-OO1CMS Nitrogen Ammonia as Sample Matrix Spike 1.89 mg/L 0.050 95 Run TECHNICON_090212A 02/12/09 1302 80 120 Sample ID C09020454-OO1CMSD Nitrogen Ammonia as Sample Matrix Spike Duplicate 1.88 mg/L 0.050 94 Run TECHNICON_090212A 02/12/09 1304 80 120 0.5 20 Method A4500-S04 Sample ID LCS-1_090224 Sulfate Laboratory Control Sample 4930 mg/L 59 103 Batch 090224_1_S04-TURB-W Run TURB-2_090224A 02/24/09 1206 90 110 Sample ID MBLK-1_090224 Sulfate Method Blank ND mg/L 0.6 Run TURB-2_090224A 02/24/09 1207 Sample ID C09020521-0O7AMS Sulfate Sample Matrix Spike 469 mg/L 5.9 95 Run TURB-2_090224A 02/24/09 1342 90 110 Sample ID C09020521-OO7AMSD Sulfate Sample Matrix Spike Duplicate 477 mg/L 5.9 99 Run TURB-2_090224A 02/24/09 1343 90 110 1.7 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration QAIQC Summary Report Client Denison Mines USA Corp Report Date 03/17/09 Project 1st Quarter Groundwater Work Order C09020434 Method E200.7 Sample ID MB-090224A Calcium Iron Magnesium Manganese Potassium Sodium Sample ID LFB-090224A Calcium Iron Magnesium Manganese Potassium Sodium Method Blank ND ND ND ND ND ND fl Laboratory Fortified Blank 50.6 mg/L 1.02 mg/L 52.3 mg/L 0.992 mg/L 44.1 mg/L 49.5 mg/L Run ICP2-C_090224A 101 85 125 102 85 125 105 85 125 99 85 125 88 85 125 99 85 125 Magnesium Manganese Potassium Sodium 1.0 0.030 1.0 0.010 1.0 1.0 Run ICP2-C_090224A 70 130 96 70 130 98 70 130 70 130 87 70 130 94 70 130 02/24/09 1844 1.0 0.030 1.0 0.010 1.0 1.0 Run ICP2-C_090224A 70 130 92 70 130 98 70 130 70 130 87 70 130 94 70 130 02/24/09 1848 0.1 20 1.7 20 0.1 20 20 0.4 20 0.3 20 Qualifiers RL Analyte reporting limit The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated MDC Minimum detectable concentration ENERGY LAIIORA TORIES ENERG VLABORA TORIES INC 2393 Sail Creek Hlqbway 82601 AC Box 3258 Caspe1c WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 casperenergy/ab.com wwwenergy/atxcom Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Batch R115150 Run ICP2-C_090224A mg/L mg/L mg/L mg/L mg/L mg/L 0.08 0.003 0.04 0.0002 0.03 0.3 0.50 0.030 0.50 0.010 0.50 0.50 02/24/09 1158 02/24/09 1202 Sample ID C09020453-OO4AMS2 Sample Matrix Spike Calcium 571 mg/L Iron 4.83 mg/L 195 mg/L 17.0 mg/L 91.6 mg/L 120 mg/L Sample ID C09020453-OO4AMSD Sample Matiix Spike Duplicate Calcium 570 mg/L Iron 4.75 mg/L Magnesium 194 mg/L Manganese 17.1 mg/L Potassium 92.0 mg/L Sodium 120 mg/L ND Not detected at the reporting limit QAJQC Summary Report Method 200.8 Sample ID LRB Selenium Thallium Uranium Sample ID LFB Selenium Thallium Uranium Sample ID C09020453-006AM54 Selenium Thallium Uranium Method Blank ND ND ND Laboratory Fortified Blank 0.0488 mg/L 0.0482 mg/L 0.0483 mg/L Sample Matrix Spike 0.0548 mg/L 0.0508 mg/L 0.0553 mgJL Sample ID C09020453-OO6AMSD Sample Matrix Spike Duplicate Selenium 0.0565 mg/L Thallium 0.0512 mg/L Uranium 0.0551 mgJL Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration Run ICPMS2-C_09021 98 98 85 115 96 85 115 97 85 115 Run ICPMS2-C_0902198 107 70 130 101 70 130 105 70 130 EIERGY LABORA TORIES ENERG VLASORA TORIES INC 2393 Sail CreekHI/way 8260 PC Box 3258 Caspe WY82602 Toll Free 888.235.0515 3072350515 Fai 307234.1639 caspeWenergy/ab corn www.energylab.com Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Report Date 03/17/09 Work Order C09020434 mg/L mg/L mg/L Run ICPMS2-C_09021 98 Batch R114968 0.001 3E-05 8E-06 0.0014 0.0010 0.00030 0.0010 0.10 0.00030 0.0010 0.10 0.00030 02/19/09 1645 02/19/09 1652 02/19/09 1847 02/19/09 1853 20 20 0.5 20 Run ICPMS2-C_090219B 110 70 130 102 70 130 105 70 130 ND Not detected at the reporting limit ENERO YLABORA TORIES INC 2393 Sail Creek Hibway 82601 PG Box 3258 Casper WY82602 Toil Free 888.235.0515 307.235.0515 Far 307234.1639 caspeitenergylab.com wwwenergy/ab.com QAIQC Summary Report Report Date 03/17/09 Work Order C09020434 EIERGY LABORATORIES Client Denison Mines USA Corp Project 1st Quarter Groundwater Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration 0.0010 0.0 10 0.010 0.050 0.010 0.010 Run ICPMS2-C_090223A 100 70 130 95 70 130 98 70 130 95 70 130 94 70 130 91 70 130 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Batch R115117 it Method Blank ND ND ND ND ND ND ND ND ND ND ND ND ND 0.0001 ND ND 0.0007 mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L g/L Method E200.8 Sample ID LRB Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample ID LFB Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc 0.0003 6E-05 6E-05 8E-05 0.00010 4E-05 2E-05 SE-OS 4E-05 9E-05 0.001 2E-O5 3E-O5 0.0001 8E-06 9E-O5 6E-05 0.0010 0.0010 0.00 10 0.00 10 0.0010 0.0010 0.00 10 0.00 10 0.0010 0.0010 0.0014 0.0010 0.0010 0.0010 0.00030 0.00 10 0.00 10 Run ICPMS2-C_090223A Run ICPMS2-C_090223A 99 85 115 96 85 115 99 85 115 98 85 115 98 85 115 97 85 115 98 85 115 97 85 115 99 85 115 103 85 115 100 85 115 95 85 115 98 85 115 98 85 115 97 85 115 98 B5 115 101 85 115 02/23/09 1416 02/23/09 1423 02/23/09 B49 ii Laboratory Fortified Blank 0.0493 mg/L 0.0478 mg/L 0.0495 mg/L 0.0489 mg/L 0.0491 mg/L 0.0485 mg/L 0.0492 mg/L 0.0487 mg/L 0.0494 mg/L 0.0515 mg/L 0.0500 mg/L 0.0189 mg/L 0.0489 mg/L 0.0492 mg/L 0.0486 mg/L 0.0490 mg/L 0.0511 mg/L Sample ID C09020267-OOIBMS4 ii Sample Matrix Spike Arsenic 0.0506 mg/L Beryllium 0.0477 mg/L Cadmium 0.0490 mg/L Chromium 0.0492 mg/L Cobalt 0.0476 mg/L Copper 0.0464 mg/L ND Not detected at the reporting limit QNQC Summary Report Method E200.8 Sample ID LRB Mercury Batch R115192 02/25/09 1236 Sample ID LFB Mercury Laboratory Fortified Blank 0.00506 mgIL Run ICPMS2-C_090225A 0.0010 101 85 115 02/25/09 1243 Sample ID C09020363-OOIBMS4 Mercury Sample Matrix Spike 0.0050 mg/L Run ICPMS2-C_090225A 0.0010 100 70 130 02/25/09 1316 Sample ID C09020363-OO1SMSD Mercury Sample Matrix Spike Duplicate 0.0051 mg/L Run ICPMS2-C_090225A 0.0010 103 70 130 02/25/09 1323 2.6 20 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration LALIORJ4 TORIES ENERGYLABORA TORIES INC 2393 Sail CreekHibway 82601 P0 Box 3258 Caspe WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 caspenWenergy/ab.com www.energylab.com Client Denison Mines USA Corp Project 1st Quarter Groundwater Report Date 03/17/09 Work Order C09020434 Analyte Count Result Units RL %REC Low LimIt High Limit RPD RPDLIm1t Qual Method E200.8 Batch R115117 Sample ID C09020267-OOIBMS4 jj Sample Matrix Spike Run ICPMS2-C_090223A 02/23/09 1849 Lead 0.0509 mg/L 0.050 102 70 130 Manganese 0.203 mg/L 0.010 97 70 130 Molybdenum 0.0542 mg/L 0.10 105 70 130 Nickel 0.0467 mg/L 0.050 92 70 130 Selenium 0.0531 mg/L 0.0010 100 70 130 Silver 0.0112 mg/L 0.010 56 70 130 Thallium 0.0514 mg/L 0.10 103 70 130 Tin 0.0536 mg/L 0.10 107 70 130 Uranium 0.0545 mg/L 0.00030 108 70 130 Vanadium 0.0504 mg/L 0.10 99 70 130 Zinc 0.0520 mg/L 0.010 54 70 130 Sample ID C09020267-OOIBMSD fl Sample Matrix Spike Duplicate Run ICPMS2-C_090223A 02/23/09 1923 Arsenic 0.0515 mgJL 0.0010 102 70 130 1.8 20 Beryllium 0.0476 mg/L 0.010 95 70 130 0.2 20 Cadmium 0.0493 mg/L 0.010 99 70 130 0.5 20 Chromium 0.0474 mg/L 0.050 91 70 130 20 Cobalt 0.0465 mg/L 0.010 92 70 130 2.4 20 Copper 0.0474 mg/L 0.010 93 70 130 2.1 20 Lead 0.0511 mg/L 0.050 102 70 130 0.4 20 Manganese 0.196 mg/L 0.010 83 70 130 3.4 20 Molybdenum 0.0538 mg/L 0.10 104 70 130 20 Nickel 0.0467 mg/L 0.050 92 70 130 20 Selenium 0.0513 mg/L 0.0010 97 70 130 3.4 20 Silver 0.0120 mg/L 0.010 60 70 130 6.9 20 Thallium 0.0514 mg/L 0.10 103 70 130 20 Tin 0.0532 mg/L 0.10 106 70 130 20 Uranium 0.0551 mg/L 0.00030 109 70 130 1.1 20 Vanadium 0.0493 mg/L 0.10 97 70 130 20 Zinc 0.0532 mg/L 0.010 57 70 130 2.2 20 Method Blank ND mg/L 4E-05 Run ICPMS2-C_090225A ND Not detected at the reporting limit Spike recovery outside of advisory limits EIERGY LAIJOIZA TORIES ENERGYLABORA TORIES INC 2393 Sail CreekHihway 8260 P0 Box 3258 Caspei WV82602 Toil Free 888.235 0515 307235.0515 Fax 307234.1639 casperenergy/ab.corn wwv.energy/aA corn QAJQC Summary Report Report Date 03/17/09 Work Order C09020434 Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Batch R115667 Sample ID LRB Iron Manganese Method Blank ND mg/L ND mg/L 0.0006 3E-05 Run ICPMS4-C_090309A 03/09/09 1222 Sample ID LFB Iron Manganese Laboratory Fortified Blank 1.27 mg/L 0.0467 mg/L 0.0010 0.0010 101 93 Run ICPMS4-C_090309A 85 115 85 115 03109109 1229 Sample ID C09020974-OO9DMS4 Iron Manganese Sample Matrix Spike 2.59 mg/L 0.120 mg/L 0.030 0.010 103 109 Run ICPMS4-C_090309A 70 130 70 130 03/09109 14.27 Sample ID C09020974-OO9DMSD Iron Manganese Sample Matrix Spike Duplicate 2.57 mg/L 0.119 mg/L 0.030 0.010 102 109 Run ICPMS4-090309A 70 130 70 130 0.8 0.1 03/09/09 1433 20 20 Method E353.2 Batch R114843 Sample ID MBLK-1 Nitrogen NitrateNitrite as Ni Method Blank ND mg/L 0.03 Run TECHNICON_090218A 02/18/09 1208 Sample ID LCS-2 Nitrogen NitrateNitrite as Laboratory Control Sample 2.56 mg/L 0.10 102 Run TECHNICON_090218A 90 110 02/18/09 1211 Sample ID C09020454-OOICMS Nitrogen NitrateNitrite as Sample Matrix Spike 4.64 mg/L 0.10 103 Run TECHNICON_090218A 90 110 02/18/09 1226 Sample ID C09020454-OO1CMSD Nitrogen NitrateNitriteas Sample Matrix Spike Duplicate 4.68 mg/L 0.10 105 Run TECHNICON_090218A 90 110 0.9 02/18/09 1228 10 Method E900.1 Batch GA-0215 Sample ID MB-GA-0215 Method Blank Run G5000W_090226C 03/02/09 1410 Gross Alpha minus Rn 0.6 pCi/L Gross Alpha minus Rn Precision 0.3 pCi/L Gross Alpha minus Rn MDC 0.3 pCi/L Sample ID LCS-GA-0215 Laboratory Control Sample Run G5000W_090226C 03/02/09 1410 Gross Alpha minus Rn 23.8 pCi/L 88 70 130 Sample ID TAP WATER-MS Sample Matrix Spike Run G5000W_090226C 03/02/09 1549 Gross Alpha minus Rn 26.3 pCi/L 93 70 130 Sample ID TAP WATER-MSD Sample Matrix Spike Duplicate Run G5000W_090226C 03/02/09 1549 Gross Alpha minus Rn 24.2 pCi/L 84 70 130 8.6 22.1 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration QAIQC Summary Report Analyte Method SW82608 Sample ID 12-FEB-09_LCS_3 Acetone Benzene Carbon tetrachioride Chloroform Chloromethane mp-Xylenes Methyl ethyl ketone Methylene chloride Naphthalene o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 Laboratory Control Sample 110 ug/L 8.8 ug/L 10.0 ug/L 10 ug/L 8.4 ug/L 17 ug/L 110 ug/L 11 ug/L 9.1 ug/L 8.8 ug/L 9.0 ugJL 26 ug/L Run GCMS2_090212A 20 113 70 130 1.0 88 70 130 1.0 100 70 130 1.0 103 70 130 1.0 84 70 130 1.0 84 70 130 20 113 70 130 1.0 106 70 130 1.0 91 70 130 1.0 88 70 130 1.0 90 70 130 1.0 86 70 130 1.0 112 80 120 1.0 120 70 130 1.0 114 80 130 1.0 118 80 120 Sample ID C09020435-OOIFMS Benzene Carbon tetrachloride Chloroform p-Xylenes o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 ii Sample Matrix Spike 97 ug/L 110 ug/L 110 ug/L 88 ug/L 94 ug/L 94 ug/L 180 ug/L Run GCMS2_090212A 10 97 70 130 10 107 70 130 10 110 70 130 10 88 70 130 10 94 70 130 10 94 70 130 10 91 70 130 10 110 80 120 02/12/09 1932 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration EIERGY LASORA TORIES ENERO YLABORA TORIES INC 2393 Sail CreekHihway 82501 EQ Box 3258 CaspeI WV82602 roll Free 888.235.0575 307235.0515 Fax 307234.1539 caspenllenergy/ab.com wwwenergy/ab.com Client Denison Mines USA Corp Project 1st Quarter Groundwater Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Batch R114695 Report Date 03/17/09 Work Order C09020434 02/12/09 1028 02/12/09 1351SampleID12-FEB-09_MBLK_6 jfi Method Blank Run GCMS2_090212A Acetone ND ug/L 20 Benzene ND ug/L 1.0 Carbon tetrachloride ND ug/L 1.0 Chloroform ND ug/L 1.0 Chioromethane ND ug/L 1.0 mp-Xylenes ND ug/L 1.0 Methyl ethyl ketone ND ug/L 20 Methylene chloride ND ug/L 1.0 Naphthalene ND ug/L 1.0 o-Xylene ND ug/L 1.0 Toluene ND ug/L 1.0 Xylenes Total ND ug/L 1.0 Surr 12-Dichlorobenzene-d4 1.0 112 80 120 Surr Dibromofluoromethane 1.0 105 70 130 Surr p-Bromofluorobenzene 1.0 122 80 120 Surr Toluene-d8 1.0 115 80 120 ND Not detected at the reporting limit Spike recovery outside of advisory limits ENERGVLASORA TORIES INC P2393 Sail Creek H1qbway 82601 P0 Box 3258 Caspe4c WV82602 To//Free 888.235.0515 307235.0515 Fax 307234.1639 caspeailenergylab.com wwwenergy/ab.comEIERGY LAI3ORA TORIES QA/QC Summary Report Client Denison Mines USA Corn Report Date 03/17/09 Project 1st Quarter Groundwater Work Order C09020434 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit QuajJ Method SW82608 Batch R114695 Sample ID C09020435-OOIFMS fi Sample Matrix Spike Run GCMS2_090212A 02/12109 1932 Surr Dibromofluoromethane 10 110 70 130 Surr p-Bromoftuorobenzene 10 119 80 120 Surr Toluene-d8 10 116 80 120 Sample ID C09020435-OOIFMSD jj Sample Matrix Spike Duplicate Run GCMS2_090212A 02/121092010 Benzene 100 ug/L 10 104 70 130 6.8 20 Carbon tetrachloride 120 ug/L 10 116 70 130 8.3 20 Chlorofomi 120 ug/L 10 120 70 130 8.3 20 mp-Xylenes 99 ug/L 10 99 70 130 11 20 o-Xylene 110 ug/L 10 105 70 130 11 20 Toluene 100 ug/L 10 104 70 130 9.3 20 Xylenes Total 200 ug/L 10 102 70 130 11 20 Surr 12-Dichlorobenzene-d4 10 113 80 120 10 Surr Dibromofluoromethane 10 113 70 130 10 Surr p-Bromoftuorobenzene 10 120 80 120 10 SurrToluene-d8 10 115 80 120 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d Pa g e of _ _ _ PL E A S E PR I N T - Pr o v i d e pc m. r h in f n r m n t i n n po s s i b l e Co r n an Na m e tn i S o WL t e . s Re p o r t Ma l t Ad d r e s j SD a4 ti LL c l i In v o i c e re s s 5k 4 n e t c Sp e c i a l R e p o r t / F o r m a t s EL I mu s t be no t i f i e d pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g LI D W LI A 2 L A El GS A ED D / E D T E l e c t r o n i c Da t a LI PO T W / W W T P Fo r m a t _ _ _ _ _ _ _ El i St a t e Li LE V E L IV Ll O t h e r LI N E L A C Pr o j e c t Na m e PW S Pe r m i t Et c -- Sa m p l e Or i g i n EP A / S t a t e Co m p l i a n c e Jt Q u p t m r g Lv e a n J /t / n c St a t e Ye s No Co n t a c t Na r n e Ph o n e / F a x Em a i l Sa m p l e r Pl e a s e Pr i n t /c c E7 8 Z z z / rn g c L n 6 7n e i Li c e Co n t a c t Ph o n e Pu r c h a s e Or d e r Qu o t e / B o t t l e Or d e r j3 a u 1 T a K Co n t a c t EL I pr i o r to 5h b by RU S H sa m p l e su b m i t t a l 6. L - 61 fo r ch a r g e s an d co o t e r l o s Wo l sc h e d u l i n g - S e e 43 C O 5 In s t r u c t i o n Pa g e Co m m e n t s Re c e I p j J e m p On J a C cu s t o d y se a l y Bo t t l e s co o l e r s %. s t_ _ MA T R I X In t a c t si g n a t u r e 1 Ma t c h t. y /e f r J iM J I- i u j- 1 c __ SA M P L E ID E N T I F I C A T I O N Na m e Lo c a t i o n In t e r v a l et c i4 4 u J 3 2v v l w 3 4 3n t t t i 17 mi ti p B1 n 1 c 1k 1 B I 4 4 K Co l l e c t i o n Da t e 2g 2 6 0 7 2. 9 - 2 6 6 7 fl - 7- g - g o e / Co l l e c t i o n Tir n e 11 3 2 jo O 3f l /h t 2 10 Re c e i v e d b y p r i n t Da t e / T i m e Sig n a t u r e .R s l i q u i s h e d by Da t e / T i m e -- t g n a t u r Cu s t o d y st e i z . $1 /0 .2 D O 9 k- 4- - - c Re c e i v e d by pr i n t Re c o r d it e I i u i a h e d by Da t e / n i n e Sig n a t u r e MU S T be /i a n a t u r Si g n e d Sa m p l e Dis p o s a l Re t u r n to Cli e n t La b Dis p o s a l /a t u C ed by La b o r a t o r y Da t e / l i m e EI E R G Y AD O / f A OT / r In ce r t a i n ci r c u m s t a n c e s sa m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s In c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to co m p l e t e th e an a l y s i s re q u e s t e d Th i s s e r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n t r a c t d a t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l r e p o r t Vis i t ou r we b si t e at ww w . e n e r c i y l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s Energy Laboratories Inc lIo rko rd Receipt Clieck list Denison Mines USA Corp C09020434 Login completed by Kimberly 1-lumiston Date and Time Received 2/11/2009 900 AM Reviewed by Received by pb Reviewed Date Carrier name Next Day Air Shipping container/cooler in good condition Yes No Not Present Custody seals intact on shipping container/cooler Yes No Not Present Custody seals intact on sample bottles Yes No Not Present Chain of custody present Yes No fl Chain of custody signed when relinquished and received Yes No fl Chain of custody agrees with sample labels Yes No Samples in proper container/bottle Yes No Sample containers intact Yes No Sufficient sample volume for indicated test Yes No All samples received within holding time Yes No Container/Temp Blank temperature 3C On Ice Water VOA vials have zero headspace Yes No No VOA vials submitted Water pH acceptable upon receipt Yes No Not Applicable Contact and Corrective Action Comments None ENERGVLABORA TORIES INC 2393 Salt reekHihway 82601 P0 Box 3258 Caspei WY82602 roll Free 888.235.0515 3072350515 Fax 307234.1639 caspeitenergyIab.com www.energylab.com CLIENT Denison Mines USA Corp Date 17-Mar-09 Project 1st Quarter Groundwater CASE NARRATIVE Sample Delivery Group C09020434 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 02118CA Oregon WY20000I Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energylab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT EIERGY LABORATORIES ENERGY/LABORATORIES INC P2393 Sail Creek H/qhway 82501 AC Box 3258 Caspec WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 casperenergy/aAcom www.energylab.com ANALYTICAL SUMMARY REPORT March 23 2009 Denison Mines USA Corn 6425 Hwy 191 Blanding UT 84511 Workorder No C09020267 Quote ID C1640 POC Wells Monthly Groundwater Sampling Project Name 1st Quarter Groundwater Energy Laboratories Inc received the fo llowing samples for Denison Mine USA Co mon 2/6/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09020267-001 MW 02/04/09 1207 02/06/09 Aqueous Metals by ICP/ICPMS Dissolved Fluoride C09020267-002 MW 12 02/04/09 1352 02/06/09 Aqueous Metals by ICP/ICPMS Dissolved C09020267-003 MW 14 02/04/09 0940 02/06/09 Aqueous Metals by ICP/ICPMS Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen Ammonia Nitrogen Nitrate Nitrite pH Gross Alpha minus Rn222 and Uranium Solids Total Dissolved Sulfate 5W8260B VOCs Standard List C09020267-004 MW 28 02/04/09 1612 02/06/09 Aqueous Same As Above C09020267-005 MW 24 02/05/09 0810 02/06/09 Aqueous Same As Above C09020267-006 MW 60 02/05/09 0715 02/06/09 Aqueous Same As Above C09020267-007 Trip Blank 02/05/09 0810 02/06/09 Aqueous SW8260B VOCs Standard List C09020267-008 Temp Blank 02/06/09 Aqueous Temperature As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QNQC Summary Report or the Case Narrative if you have any questions regarding these tests results please call Report Approved By StLphcuuA WdJJuf EIERGY LABORA TORIES Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration LABORA TORIES ENERG YLASORA TORIES INC 2393 Sail Greek Hq/iway 52501 P0 Sax 3258 Caspei WY82502 ____________Tail Free 888.235.0515 307235.0515 Fax 307234.1539 casperenergy/ab.canv www.energylab.com QA/QC Summary Report Client Denison Mines USA Corp Project lstQuarterGroundwater Report Date 03/23/09 Work Order C09020267 RPD RPDLimit QualAnalyteCountResult Units RL %REC Low Limit High Limit Method A2320 Batch R114496 Sample ID MBLK-1 Method Blank Alkalinity Total as CaCO3 ND mg/L Carbonate as C03 ND mg/L Bicarbonate as HCO3 ND mg/L 0.2 Run MANTECH_090209A 02/09/09 1318 Sample ID LCS-1 Alkalinity Total as CaCO3 Laboratory Control Sample 197 mg/L 1.0 99 Run MANTECH_090209A 02/09/09 1326 90 110 Sample ID C09020248-OOIAMS Alkalinity Total as CaCO3 Sample Matrix Spike 268 mg/L 1.0 99 Run MANTECH_090209A 02/09/09 1537 80 120 Sample ID C09020248-OOIAMSD Alkalinity Total as CaCO3 Sample Matrix Spike Duplicate 268 mg/L 1.0 99 Run MANTECH_090209A 02/09/09 1544 80 120 20 Method A2540 Sample ID MBLKI_090206 Solids Total Dissolved TDS 180 Method Blank ND mg/L Batch 090206_1_SLDS-TDS-W Run BAL-1_090206A 02/06/09 1340 Sample ID LCSI_090206 Solids Total Dissolved TDS 180 Laboratory Control Sample 998 mg/L 10 100 Run BAL-1_090206A 02/06/09 1340 90 110 Sample ID C09020267-OO6AMS Solids Total Dissolved TDS @180 Sample Matrix Spike 2040 mg/L 10 101 Run BAL-1_090206A 02/06/09 1351 90 110 Sample ID C09020267-OO6AMSD Solids Total Dissolved TDS 180 Sample Matrix Spike Duplicate 2020 mg/L 10 100 Run BAL-1_090206A 02/06/09 1351 90 110 0.6 10 Method A4500-CI Batch 090209A-CL-TTR-W Sample ID LC535-090209A Chloride Laboratory Control Sample 3490 mg/L 1.0 98 Run TITRATION_090209A 02/09/09 1157 90 110 Sample ID MBLK36-090209A Chloride Method Blank ND mg/L 0.4 Run TITRATION 090209A 02/09/09 1159 Sample ID C09020267-OO5AMS Chloride Sample Matrix Spike 113 mg/L 1.0 97 Run TITRATION_090209A 02/09/09 1426 90 110 Sample ID C09020267-OOSAMSD Chloride Sample Matrix Spike Duplicate 112 mg/L 1.0 95 Run TITRATION_090209A 02/09/09 1428 90 110 1.2 10 ND Not detected at the reporting limit EIERGY LABORII TORIES ENERG YLASORA TORIES INC 2393 Sail Creek HIq/7way 82601 AC Sax 3258 Caspec WV82602 roll Free 886.235.0515 307235.0515 Fax 307234.1639 caspercllenergy/ab.com www.energylab.com QAIQC Summary Report Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Work Order C09020267 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method A4500-F Batch R114549 Sample ID MBLK-1 Fluoride Method Blank ND mg/L 0.05 Run MANTECH_090210A 02/10/09 1129 Sample ID LCS-1 Fluoride Laboratory Control Sample 1.00 mg/L 0.10 100 Run MANTECH_090210A 02/10/09 1132 go no Sample ID C09020248-OOIAMS Fluoride Sample Matrix Spike 1.30 mg/L 0.10 103 Run MANTECHO9O21OA 02/10/09 1219 80 120 Sample ID C09020248-OOIAMSD Fluoride Sample Matrix Spike Duplicate 1.30 mg/L 0.10 103 Run MANTECH_090210A 02/10/09 1222 80 120 10 Method P4500-H Sample ID ICV1_090206_2 pH Initial Calibration Verification Standard 6.88 s.u 0.010 100 Analytical Run ORION5S5A_090206B 02/06/09 1308 98 102 Method P4500-H Sample ID C09020267-OO6ADUP pH Sample Duplicate 7.61 s.u 0.010 Batch 090206_2_PH-W_555A-1 Run ORION555A_090206B 02/06/09 1338 1.3 10 Method A4500-NH3 Batch R114647 Sample ID MBLK-1 Nitrogen Ammonia as Method Blank ND mg/L 0.02 Run TECHNICON_090212A 02/12/09 1146 Sample ID LCS-2 Nitrogen Ammonia as Laboratory Control Sample 19.8 mg/L 0.20 99 Run TECHNICQN_090212A 02/12/09 1148 80 120 Sample ID C09020234-OO5AMS Nitrogen Ammonia as Sample Matrix Spike 2.79 mg/L 0.050 111 Run TECHNICON_090212A 02/12/09 1200 80 120 Sample ID C09020234-OO5AMSD Nitrogen Ammonia as Sample Matrix Spike Duplicate 2.82 mg/L 0.050 112 Run TECHNICON_090212A 02/12/09 1202 80 120 1.1 20 Method A4500-S04 Sample ID LCS-1_090210 Sulfate Laboratory Control Sample 4970 mg/L 59 103 Batch 090210_1_504-TURB-W Run TURB-2_090210A 02/10/09 1234 90 110 Sample ID MBLK-1_090210 Sulfate Method Blank ND mg/L 0.6 Run TUR8-2_090210A 02/10/09 1236 Sample ID C09010793-OO1AMS Sulfate Sample Matrix Spike 278 mg/L 2.9 98 Run TuRB-2_090210A 02/10/09 1243 90 110 Sample ID C09010793-OOIAMSD Sulfate Sample Matrix Spike Duplicate 276 mg/L 2.9 96 Run TURB-2_090210A 02/10/09 1251 90 110 0.9 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERO YLASORA TORIES INC 2393 Sail Creek Hiqhway 82501 P0 Box 3258 Caspe.WY82502 Toll Free 888.235.0515 3072350515 Fax 307234.1539 casper@energylab.conr wwwenergy/ab.com LA3ORA TORIES QA/QC Summary Report Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Work Order C09020267 Count Result Units RL %REC Low Limit High Limit RPD RPDLimIt Qual Method E200.7 Batch R114636 Sample ID LRB Potassium Sodium Method Blank ND mg/L -0.01 mg/L 0.005 Run ICP3-C_090211A 02111/09 1502 Sample ID LFB-ICP Potassium Sodium Laboratory Fortified Blank 24.0 mg/L 26.7 mgIL 1.0 1.0 96 107 Run ICP3-C_090211A 85 115 85 115 02/11/09 1508 Sample ID C09020234-OO7CMS Potassium Sodium Sample Matrix Spike 258 mg/L 337 mgIL 1.0 1.0 99 100 Run ICP3-C_09021 1A 70 130 70 130 02/11/09 2224 Sample ID C09020234-OO7CMSD Potassium Sodium Sample Matrix Spike Duplicate 257 mg/L 341 mg/L 1.0 1.0 99 101 Run ICP3-C_09021 1A 70 130 70 130 0.5 1.2 02/11/09 2229 20 20 Method E200.7 Batch R114757 Sample ID LRB Calcium Iron Magnesium Method Blank 0.03 mg/L 0.02 mg/L 0.02 mgIL 0.02 0.0004 0.01 Run ICP3-C090213A 02/13/09 1116 Sample ID LFB-ICP Calcium Iron Magnesium Laboratory Fortified Blank 24.7 mg/L 2.48 mg/L 24.7 mg/L 1.0 0.030 1.0 99 99 99 Run ICP3-C_090213A 85 115 85 115 85 115 02113/09 1121 Sample ID C09020320-OOIBMS Calcium Iron Magnesium Sample Matrix Spike 554 mg/L 18.7 mg/L 322 mg/L 1.0 0.030 1.0 94 96 Run ICP3-C_090213A 70 130 70 130 70 130 02/13/09 1724 Sample ID C09020320-OO1BMSD Calcium Iron Magnesium Sample Matrix Spike Duplicate 592 mg/L 3.32 mg/L 346 mg/L 1.0 0.030 1.0 109 105 Run ICP3-C_090213A 70 130 70 130 70 130 6.7 140 7.2 02/13/09 1729 20 20 AR 20 Sample ID C09020383-OO7BMS Calcium Iron Magnesium Sample Matrix Spike 69.1 mg/L 0.510 mgIL 72.1 mg/L 1.0 0.030 1.0 101 100 98 Run ICP3-C_090213A 70 130 70 130 70 130 0211 3/09 1914 Sample ID C09020383-OO7BMSD Calcium Iron Magnesium Sample Matrix Spike Duplicate 69.5 mgIL 0.520 mg/L 72.8 mg/L 0.030 1.0 101 102 99 Run ICP3-C_090213A 70 130 70 130 70 130 06 02/13/09 1918 20 20 20 Qualifiers RL Analyte reporting limit The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated ND Nol detected at the reporting limit MDC Minimum detectable concentration RPD exceeds advisory limit ENERGYLABORA TORIES INC 2393 Sail Creek Hiqhway 82601 P0 Box 3258W Caspei WY82602 ____________Toll Free 888.235.0515 307.235.0515 Far 307234 1639 casper0energy/ab.corr www.energylab.com LAEORA TORIES QAJQC Summary Report Sample ID LFB-ICP Calcium Iron Magnesium Laboratory Fortified Blank 24.1 mg/L 2.43 mg/L 23.9 mg/L Run ICP3-C_09021 7A 1.0 97 85 115 0.030 97 85 115 1.0 96 85 115 02/17/09 1335 Sample Matrix Spike 830 mg/L 12.4 mg/L 517 mg/L Sample ID C09020234-OO9CMSD Sample Matrix Spike Duplicate Calcium 842 mg/L Iron 12.2 mg/L Magnesium 525 mg/L Run ICP3-C_090217A 1.0 112 70 130 0.030 118 70 130 1.0 109 70 130 Run ICP3-C_09021 7A 1.0 116 70 130 0.030 112 70 130 1.0 112 70 130 02/17/09 1617 1.4 20 1.2 20 1.6 20 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration Client Denison Mines USA Corn Project 1st Quarter Groundwater Method E200.7 Sample ID LRB Calcium Iron Magnesium Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Report Date 03/23109 Work Order C09020267 ND 0.005 ND Batch R114802 Method Blank Run ICP3-C_090217A 02/17/09 1330 mg/L mg/L mg/L 0.02 0.0004 0.01 Sample ID C09020234-OO9CMS Calcium Iron Magnesium 02/17/09 1612 ND Not detected at the reporting limit ENERGYLASORA TORIES INC 2393 Sail Creek Hq/iway 82601 P0 Box 3255 Casper WY52502 Toll Free 888.235 0515 307235.0515 Fax 307234.1639 caspenPenergy/ab.com wwwenergy/ab.com LABORATORIES QNQC Summary Report Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Work Order C09020267 Method E200.8 Sample ID LRB Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Arsenic Beryllium Cadmium Chromium Method Blank ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L NO mg/L ND mg/L ND mgIL ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L 0.0003 6E-05 6E-05 8E-05 0.00010 4E-05 2E-05 SE-OS 4E-05 4E-05 9E-05 0.001 2E-05 3E-05 0.0001 8E-06 9E-05 6E-05 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Batch R114724 Sample ID LFB Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Run ICPMS2-C_090213A Run ICPMS2-C_090213A 103 85 115 106 85 115 104 85 115 106 85 115 105 85 115 102 85 115 103 85 115 105 85 115 102 85 115 107 85 115 103 85 115 99 85 115 99 85 115 103 85 115 103 85 115 103 85 115 105 85 115 107 85 115 Run ICPMS2-C_090213A 106 70 130 93 70 130 103 70 130 97 70 130 02/13/09 1302 02/13/09 1308 02/13/09 1753 jfi Laboratory Fortified Blank 0.0513 mg/L 0.0530 mg/L 0.0518 mg/L 0.0530 mg/L 0.0527 mgIL 0.0508 mg/L 0.0515 mg/L 0.0524 mg/L 0.00509 mg/L 0.0533 mg/L 0.0517 mg/L 0.0493 mg/L 0.0198 mg/L 0.0515 mg/L 0.0517 mg/L 0.0517 mg/L 0.0523 mg/L 0.0536 mg/L 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0014 0.0010 0.0010 0.0010 0.00030 0.0010 0.0010 0.0010 0.010 0.010 0.050 Sample ID C09020267-003BM54 jfi Sample Matrix Spike Qualifiers 0.532 mg/L 0.463 mg/L 0.517 mg/L 0.493 mg/L RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit ENEROVLABORA TORIES INC 2393 Sail Creek H1q/iway 82601 P0 Box 3258 Caspe.c WY82602 ____________Toll Free 588.2850515 307235.0515 Fax 307234.1539 casperEenergy/ab.com www.energylab.com LABORA TORIES Client Denison Mines USA Corp Project 1st Quarter Groundwater QA/QC Summary Report Method E200.B Sample ID C09020267-OO3BMS4 Sample Matrix Spike Cobalt 0.480 mg/L Copper 0.508 mg/L Lead 0.506 mg/L Manganese 2.63 mg/L Mercury 0.0531 mg/L Molybdenum 0.568 mg/L Nickel 0.511 mg/L Selenium 0.522 mg/L Silver 0.174 mg/L Thallium 0.508 mg/L Tin 0.526 mg/L 0.570 mg/L 0.503 mg/L 0.566 mg/L Run ICPMS2-C_090213A 95 70 130 102 70 130 101 70 130 70 130 106 70 130 110 70 130 102 70 130 103 70 130 87 70 130 102 70 130 105 70 130 102 70 130 100 70 130 103 70 130 Run ICPMS2-C_090213A 02/13/09 1800 106 70 130 0.6 20 92 70 130 20 101 70 130 20 95 70 130 20 94 70 130 1.2 20 101 70 130 0.7 20 100 70 130 0.9 20 70 130 20 106 70 130 0.2 20 108 70 130 20 102 70 130 0.1 20 98 70 130 4.9 20 86 70 130 1.1 20 101 70 130 0.1 20 101 70 130 20 102 70 130 0.1 20 97 70 130 2.8 20 101 70 130 1.4 20 Qualifiers RL Analyte reporting limit The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated MDC Minimum detectable concentration Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Report Date 03/23/09 Work Order C09020267 Batch R114724 02/13/09 1753 0.010 0.010 0.050 0.010 0.0010 0.10 0.050 0.0023 0.010 0.10 0.10 0.00030 0.10 0.0 10 0.0010 0.0 10 0.010 0.050 0.010 0.010 0.050 0.0 10 0.0010 0.10 0.050 0.0023 0.0 10 0.10 0.10 0.00030 0.10 0.010 Uranium Vanadium Zinc Sample ID C09020267-OO3BMSD Sample Matrix Spike Duplicate Arsenic 0.529 mg/L Beryllium 0.459 mg/L Cadmium 0.507 mg/L Chromium 0.483 mg/L Cobalt 0.474 mg/L Copper 0.504 mg/L Lead 0.502 mg/L Manganese 2.58 mg/L Mercury 0.0532 mg/L Molybdenum 0.557 mg/L Nickel 0.512 mg/L Selenium 0.497 mg/L Silver 0.172 mg/L Thallium 0.508 mg/L Tin 0.510 mg/L Uranium 0.569 mg/L Vanadium 0.489 mg/L Zinc 0.558 mg/L ND Not detected at the reporting limit ENERGYLI4BORA TORIES INC 2393 Sail Creek Hqfl way 82601 P0 Sex 3258 Caspe1c WY82602 ____________Toil Free 588.2350515 307.235.0515 Fax 307.234.1639 casperenergy/ab.com wwwenergy/ab.cam LABORATORIES QA/QC Summary Report Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Work Order C09020267 Analyte Count Result units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Batch R114812 Sample ID LRB Mercury Silver Method Blank 5E-05 mg/L ND mg/L 4E-05 4E-05 Run ICPMS4-C_090217A 02/17/09 1252 Sample ID LFB Mercury Silver Laboratory Fortified Blank 0.00539 mg/L 0.0217 mg/L 0.0010 0.0010 107 109 Run ICPMS4-C_090217A 85 115 85 115 02/17/09 1258 Sample ID C09020275-OO1CMS4 Mercury Silver Sample Matrix Spike 0.00565 mg/L 0.0139 mg/L 0.0010 0.010 113 69 Run ICPMS4-C_090217A 70 130 70 130 02/17/09 1450 Sample ID C09020275-OOICMSD Mercury Silver Sample Matrix Spike Duplicate 0.00557 mg/L 0.0143 mg/L 0.0010 0.010 111 72 Run ICPMS4-C_090217A 70 130 70 130 1.4 02/17/09 1456 20 20 Method E200.8 Batch Ri 14880 Sample ID LRB Mercury Molybdenum Method Blank NO mg/L NO mg/L 4E-05 4E-05 Run ICPMS2-C_090218A 02/18/09 1334 Sample ID LFB Mercury Molybdenum Laboratory Fortified Blank 0.00498 mg/L 0.0517 mg/L 0.0010 0.0010 100 103 Run ICPMS2-C_090218A 85 115 85 115 02/18/09 1341 Sample ID C09020267-OO4BMS4 Mercury Molybdenum Sample Matrix Spike 0.0263 mg/L 0.266 mg/L 0.0010 0.10 105 106 Run ICPMS2-C_090218A 70 130 70 130 02/18/09 1800 Sample ID C09020267-OO4BMSD Mercury Molybdenum Sample Matrix Spike Duplicate 0.0259 mg/L 0.270 mg/L 0.0010 0.10 104 108 Run ICPMS2-C_090218A 70 130 70 130 1.4 1.6 02/18/09 1807 20 20 Method E200.8 Batch R115117 Sample ID LRB Manganese Method Blank ND mg/L SE-OS Run ICPMS2-Q090223A 02/23/09 1416 Sample ID LFB Manganese Laboratory Fortified Blank 0.0487 mg/L 0.0010 97 Run ICPMS2-C_090223A 85 115 02/23/09 1423 Sample ID C09020267-OOIBMS4 Manganese Sample Matrix Spike 0.203 mg/L 0.010 97 Run ICPMS2-C_090223A 70 130 02/23/09 1849 Sample ID C09020267-OOIBMSD Manganese Sample Matrix Spike Duplicate 0.196 mg/L 0.010 83 Run ICPMS2-C_090223A 70 130 3.4 02/23/09 1923 20 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits Client Denison Mines USA Corp Project 1st Quarter Groundwater Method E353.2 Sample ID MBLK-1 Nitrogen NitrateNitrite as Sample ID LCS-2 Nitrogen NitrateNitrite as Sample ID C09020234-OO5AMS Nitrogen NitrateNitrite as Sample ID C09020234-OO5AMSD Nitrogen NitrateNitrlte as Method E900.1 Sample ID MB-GA-0214 Method Blank Gross Alpha minus Rn 0.8 pCi/L Gross Alpha minus Rn Precision 0.3 pCi/L Gross Alpha minus Rn MDC 0.3 pCi/L Sample ID LCS-GA-0214 Laboratory Control Sample Gross Alpha minus Rn 29.9 pCi/L Sample ID TAP WATER-MS Sample Matrix Spike Gross Alpha minus Rn 30.1 pCi/L Sample ID TAP WATER-MSD Sample Matrix Spike Duplicate Gross Alpha minus Rn 27.6 pCi/L Run G5000W_090226B 111 70 130 Run G5000W_090226B 109 70 130 Run G5000W_090226B 99 70 130 LAI3ORA TORIES ENERGYLABORA TORIES INC 2393 Sail Creek Hqhway 8260 P0 Box 3258 Caspec WY82602 ____________Toll Free 888.235 0515 307235.0515 Fax 307234.1639 casperilenergylab.conv wwwenergy/ab.coni QAIQC Summary Report Count Result Units RL %REC Low Limit High Limit Method Blank ND mglL 0.03 Run TECHNICON 09021 1A Laboratory Control Sample 2.25 mg/L 0.10 90 Run TECHNICON_09021 1A 90 110 Sample Matrix Spike 1.97 mg/L 0.10 99 Run TECHNICON_09021 1A 90 110 Sample Matrix Spike Duplicate 2.04 mg/L 0.10 102 Run TECHNICON_09021 1A 90 110 3.5 Report Date 03/23/09 Work Order C09020267 RPD RPDLimlt Qua Batch R114584 02/11/09 1007 02/11/09 1009 02/11/09 1024 02/11/09 1027 10 Batch GA-0214 Run G5000W_090226B 03/02/09 1228 03/02/09 1228 03/02/09 1409 03/02/09 1409 8.5 22 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit ENERGYLABORA TORIES INC 2393 Sail Creek Hq/iway 82601 P0 Sax 3258 Casper WY82602 Tail Free 888.235.0515 307235.0515 Fax 307234.1639W casperenergyIab.cani wwwenergy/ab.cani LABORATORIES QAIQC Summary Report Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Work Order C09020267 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method SWS26OB Batch R114541 Sample ID 09-FEB-09_LCS_3 Laboratory Control Sample Duplicate Run GCMS2_090209B 02/09/09 1418 Acetone 130 ug/L 20 131 70 130 Benzene 9.4 ug/L 1.0 94 70 130 Carbon tetrachloride 10 ug/L 1.0 104 70 130 Chloroform 10 ug/L 1.0 103 70 130 Chloromethane 8.7 ug/L 1.0 87 65 135 mp-Xylenes 19 ug/L 1.0 93 70 130 Methyl ethyl ketone 110 ug/L 20 109 70 130 Methylene chloride 10 ug/L 1.0 104 70 130 Naphthalene 10 ug/L 1.0 105 70 130 o-Xylene 9.6 ug/L 1.0 96 70 130 Toluene 9.6 ug/L 1.0 96 70 130 Xylenes Total 28 ug/L 1.0 94 70 130 Surr 12-Dichlorobenzene-d4 1.0 112 80 120 Surr Dibromofluoromethane 1.0 112 70 130 Surr p-Bromofluorobenzene 1.0 114 80 130 Surr Toluene-dB 1.0 116 80 120 Sample ID 09-FEB-09_MBLK_6 Method Blank Run GCMS2_090209B 02/09/09 1623 Acetone ND ug/L 20 Benzene ND ug/L 1.0 Carbon tetrachloride ND ug/L 1.0 Chloroform ND ugIL 1.0 Chioromethane ND ug/L 1.0 mp-Xylenes ND ug/L 1.0 Methyl ethyl ketone ND ug/L 20 Methylene chloride ND ug/L 1.0 Naphthalene ND ug/L 1.0 o-Xylene ND ug/L 1.0 Toluene ND ugIL 1.0 Xylenes Total ND ug/L 1.0 Surr 12-Dichlorobenzene-d4 1.0 113 80 120 Surr Dibromofluoromethane 1.0 108 70 130 Surr p-Bromofluorobenzene 1.0 118 80 120 Surr Toluene-d8 1.0 116 80 120 Sample ID C09020267-OO3EMS fl Sample Matrix Spike Run GCMS2_090209B 02/09/09 2205 Benzene 91 ug/L 10 91 70 130 Carbon tetrachloride 99 ug/L 10 99 70 130 Chloroform 110 ug/L 10 107 70 130 mp-Xylenes 87 ug/L 10 87 70 130 o-Xylene 93 ug/L 10 93 70 130 Toluene 91 ug/L 10 91 70 130 Xylenes Total 180 ug/L 10 90 70 130 Surr 12-Dichlorobenzene-d4 10 115 80 120 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERGYLABORA TORIES INC 2393 Sail Creek Hifq/iway 82601 P0 Box 3258 Caspe1c WY82602 _____________To/I Free 888.235.0515 307.235.05/5 Fai 307.234.1539 caspen5energyIab.coiru www.energylab.com LABORATORIES QAIQC Summary Report Client Denison Mines USA Corp Report Date 03/23/09 Project 1st Quarter Groundwater Work Order C09020267 Method SW8260B Sample ID C09020267.003EM5 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 Sample ID C09020267-OO3EMSD j.j Sample Matrix Spike Duplicate Benzene Carbon tetrachioride Chloroform mp-Xylenes o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Sum Toluene-d8 Run GCMS2_090209B 10 116 70 130 10 117 80 120 10 116 80 120 10 103 70 130 12 20 10 112 70 130 12 20 10 118 70 130 9.6 20 10 97 70 130 11 20 10 104 70 130 11 20 10 102 70 130 11 20 10 100 70 130 11 20 10 112 80 120 10 10 114 70 130 10 10 115 80 120 10 10 115 80 120 10 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration Malyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual ji Sample Matrix Spike Batch R114541 02/09/09 2205 100 110 120 97 100 100 200 ug/L ug/L ug/L ug/L ug/L ug/L ug/L Run GCMS2_090209B 02/09/09 2243 ND Not detected at the reporting limit Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d Pa g e of PL E A S E PR I N T - Pr o v i d e as nm r h in f n r m a t i n n nn c i h I n Co m p a n y Na Q Q Re p o r t Ma i l Ad d r e s s Pr o j e c t Na m e PW S Pe r m i t Et c Sa m p l e Or i g i n Ot c St a t e L4 r Co n t a c t Na m e Ph o n e / F a x Em a i l EP A / S t a t e Co m p l i a n c e Ye s No Sa m p l e r Pl e a s e Pr i n t 10 ig i o t v t c L gg S 7 J In v o i c e Ad d r e s s $r 2 4 6 Sp e c i a l Re p o r t / F o r m a t s EL I mu s t be no t i f i e d pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g LI D W EA 2 L A GS A ED D / E D T E l e c t r o n i c Da t a LP O T W A N W T P Fo r m a t QS t a t e EL E V E L I V fl Ot h e r NE L A C rL a VK - Z 2 Z I // h 4 In v o i c e Co n t a c t Ph o n e Pu r c h a s e Or d e r Qu o t e / B o t t l e Or d e r hf l f l z / Co n t a c t EL I pr i o r to 5e d by RU S H sa m p l e su b m i t t a l rt t - 4 f7 fo r ch a r g e s an d co o l e r ID s sc h e d u l i n g Se e LU In s t r u c t i o n Pa g e 12 Re c e l p t T e m p cS 1 $ Co m m e n t s On Ic .9e- - S7 N Q El co cu s t o d y 5e a l J LU Bo t t l e s J7 co o l e r s MA T R I X -1 2 e f/ 6 t 4 / In t a c t ON si g n a t u r e RN Ma t c h 7I I l i _ _ _ _ II I I I I I I I I I i i @_ _ _ SA M P L E ID E N T I F I C A T I O N Na m e Lo c a t i o n In t e r v a l et c fl f o V - c 2M W - 1 2 4Z K -a y 7m p % 4 P h er / / t 1 a 6 10 Co l l e c t i o n Da t e Zt 2- - o q zo g 2- o CO / Co l l e c t i o n Ti m e 12 0 7 I3 2 qq o /4 / 2 a Cu s t o d y Bs t h 3 u i a h e d by l p a n t Da t e / l l m e / c 9 4/ s TR ve p ui i 7 i e sig n a t u r e I4 r Lc L ts z t g Re c o r d elm uia h e d by pr i n t Da t e / T i m e lv i US T be 1 tt h t u Re c e i v e d by pr i n t Da t e / T i m e Sig n a t u r e Si g n e d Sa m p l e Dis p o s a l Re t u r n to Cli e n t La b Dis p o s a l d4 7 qg La ra o r y Da t e / T i m e sig n a t u r e EI E R G Y A/ 2 0 / A /O f / r S In ce r t a i n ci r c u m s t a n c e s s a m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s I n c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to co m p l e t e th e an a l y s i s re q u e s t e d Th i s se r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n f r a c t d a t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l r e p o r t Vis i t ou r we b si t e at ww w . e n e r o v l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s Energy Laboratories Inc 1IIo rko rd Rece he list IIUM II IIHIOM IllMtIllhI Denison Mines USA Corp C09020267 Login completed by Kimberly Humiston Date and Time Received 2/6/2009 945 AM Reviewed by Received by pb Reviewed Date Carrier name Next Day Air Shipping container/cooler in good condition Yes No Not Present Li custody seals intact on shipping container/cooler Yes No Not Present fl custody seals intact on sample bottles Yes No Not Present Chain of custody present Yes No chain of custody signed when relinquished and received Yes No chain of custody agrees with sample labels Yes No ii Samples in proper container/bottle Yes No Sample containers intact Yes No Sufficient sample volume for indicated test Yes No fl All samples received within holding time Yes No container/Temp Blank temperature 3C On Ice Water VOA vials have zero headspace Yes No No VOA vials submitted Water pH acceptable upon receipt Yes No fl Not Applicable fl Contact and Corrective Action Comments Received VOA vials for samples MW-S and MW-12 however analysis not requested COC Per Ryan Palmer 2/6/2009 disgard samples as VOCs are not needed on those samples ENERGVLASORA TORIES INC 2393 Sail Creek Hq/i way 82601 P0 Sax 3258 Caspei WY82602 ____________Tail Free 888.2350515-3072350515 Fax 307234.1539 casperenergy/ab.canr wwwenergy/ab.cani LABORATORIES CLIENT Denison Mines USA Corp Date 23-Mar-09 Project 1st Quarter Groundwater CASE NARRATIVE Sample DelIvery Group C09020267 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 Califomia 021 18CA Oregon WY200001 Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energylab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT ENERGVLASORA TORIES INC 2393 Sail Creek Hibway 82601 P0 Box 3258 Caspe1c WV82602 Toil Free 888.235.0515 307235.0515 Far 307234.1639 casperenergy/ab.com www.energylab.comEN5RGY LA flORA TORIES March 05 2009 Denison Mines USA Corp 6425 Hwy 191 Blanding UT 84511 ANALYTICAL SUMMARY REPORT Workorder No C09020234 Project Name 1st Quarter Groundwater Quote ID C1640 POC Wells Monthly Groundwater Sampling Aqueous Metals by ICP/ICPMS Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen Ammonia Nitrogen Nitrate Nitrite pH Gross Alpha minus Rn222 and Uranium Solids Total Dissolved Sulfate SW8260B VOCs Standard List Aqueous Same As Above Aqueous Same As Above Same As Above Same As Above Same As Above Same As Above 5W8260B VOCs Standard List If you have any questions regarding these tests results please call StL1 LWL Energy Laboratories Inc received the following 11 samples for Denison Mines USA Corp on 2/5/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09020234-001 MW 20 02/02/09 1117 02/05/09 C09020234-002 MW 22 02/02/09 1027 02/05/09 C09020234-003 MW 25 02/03/09 1637 02/05/09 C09020234-004 MW 26 02/02/09 1450 02/05/09 Aqueous Same As Above C09020234-005 MW 29 02/03/09 1151 02/05/09 Aqueous Same As Above C09020234-006 MW 30 02/03/09 1002 02/05/09 Aqueous C09020234-007 MW 31 02/03/09 1417 02/05/09 Aqueous C09020234-008 MW 32 02/02/09 1352 02/05/09 Aqueous C09020234-009 MW 65 02/02/09 1352 02/05/09 Aqueous C09020234-010 Trip Blank 02/03/09 1637 02/05/09 Aqueous C09020234-01 Temp Blank 02/05/09 Aqueous Temperature As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QA/QC Summary Report or the Case Narrative Report Approved By EN5RGY L4I3ORA TORIES ENERG YLASORA TORIES INC 2393 Sail CreekHlqbw Tall ee 888.235.0515 307235.0515 Fax 307234.1639 ay 82601 P0 Box 3258 Caspac WY82602 caspenllenergy/ab.com wirv.energy/ab.com QA/QC Sumiriary Report Client Denison Mines USA Corp Project 1st Quarter Groundwater Report Date 03/05/09 Work Order C09020234 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLIm1t Qual Method A2320 Batch R114496 Sample ID MBLK-1 Method Blank Alkalinity Total as CaCO3 ND mg/L 0.2 Carbonate as C03 ND mg/L Bicarbonate as HCO3 ND mg/L Run MANTECH_090209A 02/09/09 1318 Sample ID LCS-1 Laboratory Control Sample Alkalinity Total as CaCO3 197 mg/L 1.0 Run MANTECH_090209A 02/09/09 1326 99 90 110 Sample ID C09020248-OOIAMS Sample Matrix Spike Alkalinity Total as CaCO3 268 mg/L 1.0 Run MANTECH_090209A 02/09/09 15.37 99 80 120 Sample ID C09020248-OOIAMSD Sample Matrix Spike Duplicate Alkalinity Total as CaCO3 268 mg/L 1.0 Run MANTECH_090209A 02/09/09 1544 99 80 120 20 Method A2540 Batch 090206_1_SLDS-TDS-W Sample ID MBLKI_090206 Method Blank Solids Total Dissolved TDS 180 ND mg/L Run BAL-1_090206A 02/06/09 1340 Sample ID LCSI_090206 Laboratory Control Sample Solids Total Dissolved TDS 180 998 mg/L 10 Run BAL-1_090206A 02/06/09 1340 100 90 110 Sample ID C0902020T-OOIAMS Sample Matrix Spike Solids Total Dissolved TDS 180 2060 mg/L 10 Run BAL-1_090206A 02/06/09 1341 94 90 110 Sample ID C09020207-OOIAMSD Sample Matrix Spike Duplicate Solids Total Dissolved TDS @180 2160 mg/L 10 Run BAL-1_090206A 02/06/09 1342 98 90 110 4.4 10 Sample ID C09020234-OO7BMS Sample Matrix Spike Solids Total Dissolved TDS 180 3140 mg/L 10 Run BAL-1_090206A 02/06/09 1345 97 90 110 Sample ID C09020234-OO7BMSD Sample Matrix Spike Duplicate Solids Total Dissolved TDS @180 3110 mg/L 10 Run BAL-1_090206A 02/06/09 1345 95 90 110 10 Method A4600-CI Batch 090209A-CL-TTR-W Sample ID MBLK9-090209A Method Blank Chloride ND mg/L 0.4 Run TITRATION_090209A 02/09/09 1048 Sample ID LCS35-090209A Laboratory Control Sample Chloride 3490 mg/L 1.0 Run TITRATION_090209A 02/09/09 1157 98 90 110 Sample ID C09020234-OOSBMS Sample Matrix Spike Chloride 206 mg/L 1.0 Run TITRATION_090209A 02/09/09 1408 98 90 110 Sample ID C09020234-OO5BMSD Sample Matrix Spike Duplicate Chloride 204 mg/L 1.0 Run TITRATIONO9O2O9A 02/09/09 1409 97 90 110 0.8 10 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit Result Units RL %REC Low Limit High Limit Method Blank ND mg/L 0.05 Laboratory Control Sample 1.00 mg/L 0.10 100 Sample Matrix Spike 1.30 mg/L 0.10 100 Sample Matrix Spike Duplicate 1.30 mg/L 0.10 100 Sample Matrix Spike 1.30 mg/L 0.10 103 Sample Matrix Spike Duplicate 1.30 mg/L 0.10 103 ENERG YLABORA TORIES INC 2393 Sail Creek Hibway 82601 P0 Box 3258 Caspac WY82602 ____________Toll Free 888.235.0515 307235.0515 Fax 307234.1639 casper@energylab.com wwwenergy/ab.com QAIQC Suruiriary Rapurt Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte Method A4500-F Sample ID MBLK-1 Fluoride Sample ID LCS-1 Fluoride Sample ID C09020234-OOIBMS Fluoride Sample ID C09020234-OOIBMSD Fluoride Sample ID C09020248-OOIAMS Fluodde Sample ID C09020248-OOIAMSD Fluoride Method A4500-H Sample ICVI_090205_2 pH Method A4500-H Sample C09020234-OO6BDUP pH Method A4500-NH3 Sample ID MBLK-1 Method Blank Run TECHNICON_090212A Nitrogen Ammonia as ND mg/L 0.02 Sample ID LCS-2 Laboratory Control Sample Run TECHNICON_090212A Nitrogen Ammonia as 19.8 mg/L 0.20 99 80 120 Sample ID C09020234-OOSAMS Sample Matrix Spike Run TECHNICON_090212A Nitrogen Ammonia as 2.79 mg/L 0.050 111 80 120 Sample ID C09020234.OO5AMSD Sample Matrix Spike Duplicate Run TECHNICON_090212A Nitrogen Ammonia as 2.82 mg/L 0.050 112 80 120 1.1 ID ID Initial Calibrati on Verificatio Standard 6.87 s.u 0.010 100 98 102 Sample Duplicate 7.28 s.u 0.010 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration LABORA TORIES Report Date 03/05/09 Work Order C09020234 RPD RPDLimit Qual Batch R114549 Run MANTECH_090210A 02/10/09 1129 Run MANTECH_090210A 02/10/09 1132 90 110 Run MANTECH_090210A 02/10/09 1144 80 120 Run MANTECH_090210A 02/10/09 1147 80 120 10 Run MANTECH_090210A 02/10/09 1219 80 120 Run MANTECH_090210A 02/10/09 1222 80 120 10 Analytical Run ORIONS55A_090205B 02/05/09 1518 Batch 090205_2_PH-W_555A-1 Run 0R10N555A_090205B 02/05/09 1557 10 Batch R114647 02/12/09 1146 02/12/09 1148 02/12/09 1200 02/12/09 1202 20 Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte Method A4500-S04 Sample ID LCS-1.fi90209 Sulfate Sample ID MBLK-1_090209 Sulfate Sample ID C09020207.OO2AMS Sulfate Sample ID C09020207-OO2AMSD Sulfate Sample ID C09020234-OO7BMS Sulfate Sample ID C09020234-OO7BMSD Sulfate Sample ID C09020234-OO9BMS Sulfate Sample ID C09020234-OO9BMSD Sulfate Report Date 03/05/09 Work Order C09020234 RPD RPDLimit Qual Batch 090209 504-TURB-W 02/09/09 1538 02/09/09 1540 02/09/09 1610 02/09/09 1612 0.6 10 02/09/09 1655 02/09/09 1657 0.5 10 02/09/09 1709 02/09/09 1710 0.9 10 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit EIERGY LABORA TORIES ENERGVLASORA TORIES INC 2393 Sail Creek HIbway 82601 20 Box 3258 Casper WY82602 To//Free 888.235 0515 3072350515 Fai 307234.1639 casperenergy/ab.com wwwenergy/ab.com QAIQC Summary Report Result Units RL %REC Low Limit High Limit Laboratory Control Sample 4860 mg/L Method Blank 0.8 mg/L Sample Matrix Spike 31.0 mg/L Sample Matrix Spike Duplicate 31.2 mg/L Sample Matrix Spike 973 mg/L Sample Matrix Spike Duplicate 968 mg/L Sample Matrix Spike 4280 mg/L Sample Matrix Spike Duplicate 4320 mg/L Run TURB-2_090209A 59 101 90 110 Run TURB-2_090209A 0.6 Run TURB-2_090209A 1.0 97 90 110 Run TURB-2_090209A 1.0 98 90 110 Run TURB-2_090209A 15 101 90 110 Run TURB-2_090209A 15 100 90 110 Run TURB-2_090209A 59 104 90 110 Run TURB-2_090209A 59 106 90 110 ENERGYLA DORA TORIES INC 2393 Sail Creek Hihway 62501 P0 Box 3258 Caspei WY82602 Toil Free 886235.0515 307235.0515 Fax 307234.1639 casperenergy/ab.com wwwenergy/ab.cornEISERGY LABORA TORIES .n%g.e auaiiuuiai cpui Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Work Order C09020234 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.7 Batch R114636 Sample ID LRB Method Blank Run ICP3-C_090211A 02/11/09 1502 Calcium NO mg/L 0.02 Iron 0.01 mg/L 0.0004 Magnesium 0.02 mg/L 0.01 Potassium NO mg/L 0.005 Sodium -0.01 mg/L Sample ID LFB-ICP Laboratory Fortified Blank Run ICP3-C_090211A 02/11/09 1508 Calcium 27.0 mg/L 1.0 108 85 115 Iron 2.74 mg/L 0.030 109 85 115 Magnesium 27.2 mg/L 1.0 109 85 115 Potassium 24.0 mg/L 1.0 96 85 115 Sodium 26.7 mg/L 1.0 107 85 115 Sample ID C09020234-OOTCMS Sample Matrix Spike Run ICP3-C_09021 1A 02/11/09 2224 Calcium 451 mg/L 1.0 114 70 130 Iron 2.95 mg/L 0.030 115 70 130 Magnesium 369 mg/L 1.0 114 70 130 Potassium 258 mg/L 1.0 99 70 130 Sodium 337 mg/L 1.0 100 70 130 Sample ID C09020234-OO7CMSD Sample Matrix Spike Ouplicate Run ICP3-C_09021 IA 02/11/09 2229 Calcium 466 mg/L 1.0 120 70 130 3.3 20 Iron 2.99 mg/L 0.030 117 70 130 1.2 20 Magnesium 379 mg/L 1.0 118 70 130 2.8 20 Potassium 257 mg/L 1.0 99 70 130 0.5 20 Sodium 341 mg/L 1.0 101 70 130 20 Qualifiers RL Analyte reporting limit NO Not detected at the reporting limit MDC Minimum detectable concentration ENERGYLABORA TORIES INC 2393 Sail Creek Hiqhway 82601 P0 Box 3258 Caspet WY82602 Toll Free 888.235.0515 307235.0515 Far 307234.1639 casperenergy/ab.com www.enetgylab.comEPERGY LASORJ4 TORIES QA/OC Suruittiary Repurt Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Work Order C09020234 Analyte Result Units RL YOREG Low Limit High Limit RPO RPDLimit Qual Method E200.7 Batch Ri 14802 Sample ID LRB Method Blank Run ICP3-C_090217A 02/17/09 1330 Calcium ND mg/L 0.02 Iron 0.005 mg/L 0.0004 Magnesium ND mg/L 0.01 Sample ID LFB-ICP Laboratory Fortified Blank Run ICP3-C_090217A 02/i 7/09 1335 Calcium 24.1 mg/L 1.0 97 85 115 Iron 2.43 mg/L 0.030 97 85 115 Magnesium 23.9 mg/L 1.0 96 85 115 Sample ID C09020110-OO2CMS Sample Matrix Spike Run ICP3-C_090217A 02/i 7/09 1502 Calcium 305 mg/L 1.0 116 70 130 Iron 2.95 mg/L 0.030 116 70 130 Magnesium 288 mg/L 1.0 112 70 130 Sample ID C09020110-OO2CMSD Sample Matrix Spike Duplicate Run ICP3-C_090217A 02/17/09 1506 Calcium 280 mg/L 1.0 106 70 130 8.5 20 Iron 2.66 mg/L 0.030 104 70 130 10 20 Magnesium 263 mg/L 1.0 102 70 130 9.1 20 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGYLABORA TORIES INC 2393 Sail CreekHibway 8260 20 Box 3258 Caspei WY82602 Toll Free 888.235.0515 307235.0515 Fax 307234.1639 caspeKenergy/ab.com wwwenergy/ab.comEIERGY LABORA TORIES %gnl%4%a ouuiiiiiai neiflJi Client Denison Mines USA Carp Report Date 03/05/09 Project 1st Quarter Groundwater Work Order C09020234 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Batch R114411 Sample ID LRB Method Blank Run ICPMS2-C_090206A 02/06/09 1314 Arsenic ND mg/L 0-0003 Beryllium ND mg/L 6E-05 Cadmium ND mgIL 6E-05 Chromium ND mg/L 8E-05 Cobalt ND mg/L 000010 Copper ND mg/L 4E-05 Lead ND mq/L 2E-05 Manganese ND mg/L 5E-05 Mercury ND mg/L 4E-05 Molybdenum ND mg/L 4E-05 Nickel ND mg/L 9E-05 Selenium ND mg/L 0.001 Silver ND mg/L 2E-05 Thallium ND mg/L 3E-05 Tin ND mg/L 0.0001 Uranium ND mg/L 8E-06 Vanadium ND mg/L 9E-05 Zinc ND mg/L 6E-05 Sample ID LFB Laboratory Fortified Blank Run ICPMS2-C_090206A 02/06/09 1321 Arsenic 0.0516 mg/L 0.0010 103 85 115 Beryllium 0.0514 mg/L 0.0010 103 85 115 Cadmium 0.0522 mg/L 0.0010 104 85 115 Chromium 0.0518 mg/L 0.0010 104 85 115 Cobalt 0.0518 mg/L 0.0010 104 85 115 Copper 0.0516 mg/L 0.0010 103 85 115 Lead 0.0515 mg/L 0.0010 103 85 115 Manganese 0.0516 mg/L 0.0010 103 85 115 Mercury 0.00515 mg/L 0.0010 103 85 115 Molybdenum 0.0520 mg/L 0.0010 104 85 115 Nickel 0.0513 mg/L 0.0010 103 85 115 Selenium 0.0524 mg/L 0.0014 105 85 115 Silver 0.0202 mg/L 0.0010 101 85 115 Thallium 0.0517 mg/L 0.0010 103 85 115 Tin 0.0513 mg/L 0.0010 103 85 115 Uranium 0.0516 mg/L 0.00030 103 85 115 Vanadium 0.0521 mg/L 0.0010 104 85 115 Zinc 0.0557 mg/L 0.0010 111 85 115 Sample ID C09020234-OO5CMS4 Sample Matrix Spike Run ICPMS2-C090206A 02/07/09 0250 Arsenic 0.477 mg/L 0.0010 95 70 130 Beryllium 0.441 mg/L 0.010 88 70 130 Cadmium 0.462 mg/L 0.010 92 70 130 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGVLABORA TORIES INC 2393 Sail CreekHibway 82601 P0 Box 3258 Caspe LVY82602 Toll Free 888.235.0515 307235.0515 Fax 307.234.1639 oaspenWenergy/ab.com www energy/aLt cornEfERGY LA/3ORA TORIES QAIQC Summary Repurt Client Denison Mines USA Corp Report Date 03/05/09 Project 1st Quarter Groundwater Work Order C09020234 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Batch Ri 14411 Sample 10 C09020234-OO5CMS4 Sample Matrix Spike Run ICPMS2-C_090206A 02/07/09 0250 Chromium 0.447 mg/L 0.050 89 70 130 Cobalt 0.446 mg/L 0.010 88 70 130 Copper 0.457 mg/L 0.010 91 70 130 Lead 0.480 mg/L 0.050 96 70 130 Manganese 5.45 mg/L 0.010 70 130 Mercury 0.0480 mg/L 0.0010 96 70 130 Molybdenum 0.481 mg/L 0.10 96 70 130 Nickel 0.461 mg/L 0.050 92 70 130 Selenium 0.468 mg/L 0.0023 94 70 130 Silver 0.157 mg/L 0.010 79 70 130 Thallium 0.483 mg/L 0.10 97 70 130 Tin 0.468 mg/L 0.10 94 70 130 Uranium 0.497 mg/L 0.00030 97 70 130 Vanadium 0.457 mg/L 0.10 91 70 130 Zinc 0.496 mg/L 0.010 91 70 130 Sample ID C09020234-OOSCMSD4 Sample Matrix Spike Duplicate Run ICPMS2-C_090206A 02/07/09 0256 Arsenic 0.477 mg/L 0.0010 95 70 130 20 Beryllium 0.458 mg/L 0.010 92 70 130 3.8 20 Cadmium 0.473 mg/L 0.010 95 70 130 2.3 20 Chromium 0.461 mg/L 0.050 92 70 130 3.1 20 Cobalt 0.464 mg/L 0.010 92 70 130 20 Copper 0.458 mg/L 0.010 91 70 130 0.4 20 Lead 0.485 mg/L 0.050 97 70 130 0.9 20 Manganese 5.65 mg/L 0.010 70 130 3.7 20 Mercury 0.0492 mg/L 0.0010 98 70 130 2.5 20 Molybdenum 0.494 mg/L 0.10 98 70 130 2.7 20 Nickel 0.463 mg/L 0.050 93 70 130 0.5 20 Selenium 0.455 mg/L 0.0023 91 70 130 2.9 20 Silver 0.182 mg/L 0.010 91 70 130 15 20 Thallium 0.485 mg/L 0.10 97 70 130 0.4 20 Tin 0.478 mg/L 0.10 96 70 130 2.2 20 Uranium 0.502 mg/L 0.00030 98 70 130 1.1 20 Vanadium 0.473 mg/L 0.10 95 70 130 3.4 20 Zinc 0.497 mg/L 0.010 91 70 130 0.1 20 Qualifiers RL Analyte reporting limit The analyte level was greater than four times the spike level In accordance with the method recovery is not calculated ND Not detected at the reporting limit MDC Minimum detectable concentration ElERGY LABORA TORIES ENERGYLABORA TORIES INC 2393 Salt Creek HIhway 82501 P0 Box 3258 Caspet WV82502 Toll Free 888.235.0515 307235.0515 Fax 307234.1539 caspenenergylab.com wwwenergylab.coin QA/OC Suuiiiiary Repurt Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte Result Units RL %REC Low Limit High Limit Report Date 03/05/09 Work Order C09020234 RPD RPDLimit Qual Method E200.8 Batch R114880 Sample ID LRB Mercury Method Blank ND mg/L 4E-05 Run ICPMS2-C_090218A 02118109 1334 Sample ID LFB Mercury Laboratory Fortified Blank 0.00498 mg/L 0.0010 100 Run ICPMS2-C_090218A 85 115 02/18/09 1341 Sample ID C09020383-OO7BMS4 Mercury Sample Matrix Spike 0.00504 mg/L 0.0010 101 Run ICPMS2-C_090218A 70 130 02/18/09 1550 Sample ID C09020383-OO7BMSD4 Mercury Sample Matrix Spike Duplicate 0.00505 mg/L 0.0010 101 Run ICPMS2-C_090218A 70 130 0.1 02/18/09 1557 20 Sample ID C09020267-OO4BMS4 Mercury Sample Matrix Spike 0.0263 mg/L 0.0010 105 Run ICPMS2-C_090218A 70 130 02/18/09 1800 Sample ID C09020267-OO4BMSD4 Mercury Sample Matrix Spike Duplicate 0.0259 mg/L 0.0010 104 Run ICPMS2-C_090218A 70 130 1.4 02/18/09 1807 20 Method E383.2 Batch RI 14584 Sample ID MBLK-1 Nitrogen NitrateNitrite as Method Blank ND mg/L 0.03 Run TECHNICON_090211A 02/11/09 1007 Sample ID LCS-2 Nitrogen NitrateNitrite as Laboratory Control Sample 2.25 mg/L 0.10 90 Run TECHNICON_09021 1A 90 110 02/11/09 1009 Sample ID C09020234-OO5AMS Nitrogen NitrateNitrite as Sample Matrix Spike 1.97 mg/L 0.10 99 Run TECHNICON_090211A 90 110 02/11/09 1024 Sample ID C09020234-OOSAMSD Nitrogen NitrateNitrite as Sample Matrix Spike Duplicate 2.04 mg/L 0.10 102 Run TECHNICON_090211A 90 110 3.5 02/11/09 1027 10 Method E900.1 Batch GA-021 Sample ID MB-GA-0211 Gross Alpha minus Rn Gross Alpha minus Rn Precision Gross Alpha minus Rn MDC Method Blank 0.5 pCi/L 0.3 pCi/L 0.3 pCi/L Run TENNELEC-3_090212B 02/18/09 1227 Sample ID LCS-GA-0211 Gross Alpha minus Rn Laboratory Control Sample 26.8 pCi/L 100 Run TENNELEC-3_090212B 70 130 02/18/09 1227 Sample ID TAP WATER-MS Gross Alpha minus Rn Sample Matrix Spike 26.9 pCi/L 99 Run TENNELEC-3_090212B 70 130 02/18/09 1852 Sample ID TAP WATER-MSD Gross Alpha minus Rn Sample Matrix Spike Duplicate 28.5 pCi/L 105 Run TENNELEC-3_090212B 70 130 5.6 02/18/09 1852 21.8 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit EIERGY LAROIA TORIES ENERGYLASORA TORIES INC 2393 Salt Creek HIhway 82601 P0 Sax 3258 Caspe WY82602 Tall Free 888.235.0515 307235.0515 Far 307234.1639 casperdllenergylab.com wwwenergylab.cam QA/QC Suniriiary Report Report Date 03105/09 Work Order C09020234 Client Denison Mines USA Corn Project 1st Quarter Groundwater Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method SW8260B Batch RI 14452 Sample ID 06-FEB-09_LCS_3 Laboratory Control Sample Duplicate Run GCMS2_090206A 02/06/09 1100 Acetone 120 ug/L 20 116 70 130 Benzene 11 ug/L 1.0 111 70 130 Carbon tetrachloride 11 ug/L 1.0 113 70 130 Chloroform 11 ug/L 1.0 112 70 130 Chloromethane 9.2 ug/L 1.0 92 65 135 mp-Xylenes 22 ug/L 1.0 111 70 130 Methyl ethyl ketone 120 ug/L 20 122 70 130 Methylene chloride 11 ug/L 1.0 114 70 130 Naphthalene 11 ug/L 1.0 113 70 130 o-Xylene 11 ug/L 1.0 113 70 130 Toluene 11 ug/L 1.0 113 70 130 Xylenes Total 33 ug/L 1.0 111 70 130 Surr 2-Dichlorobenzene-d4 1.0 112 80 120 Surr Dibromofluoromethane 1.0 105 70 130 Surr p-Bromofluorobenzene 1.0 113 80 130 Surr Toluene-d8 1.0 117 80 120 Sample ID 06-FEB-09_MBLK_6 Method Blank Run GCMS2_090206A 02/06/09 1413 Acetone ND ug/L 20 Benzene ND ug/L 1.0 Carbon tetrachloride ND ug/L 1.0 Chloroform ND ug/L 1.0 Chloromethane ND ug/L 1.0 mp-Xylenes ND ug/L 1.0 Methyl ethyl ketone ND ug/L 20 Methylene chloride ND ug/L 1.0 Naphthalene ND ug/L 1.0 o-Xylene ND ug/L 1.0 Toluene ND ug/L 1.0 Xylenes Total ND ug/L 1.0 Surr 2-Dichlorobenzene-d4 1.0 113 80 120 Surr Dibromofluoromethane 1.0 105 70 130 Surr p-Bromofluorobenzene 1.0 118 80 120 Surr Toluene-d8 1.0 117 80 120 Sample ID C09020169-OOIGMS Sample Matrix Spike Run GCMS2_090206A 02/06/09 1916 Benzene 190 ug/L 20 94 70 130 Carbon tetrachloride 190 ug/L 20 94 70 130 Chloroform 200 ug/L 20 101 70 130 mp-Xylenes 180 ug/L 20 88 70 130 o-Xylene 180 ug/L 20 92 70 130 Toluene 180 ug/L 20 92 70 130 Xylenes Total 360 ug/L 20 90 70 130 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration EfERGY Lp_ORA TORIES ENERO VLASORA TORIES INC 2393 Sail Creek Hi/iway 82501 RO Sax 3258 Caspec WY82502 Ta//Free 888.235.0515 307235.0515 Fax 3072341539 casperenergy/aA cam wwwenergy/ab.cam QA/QC Summary RapurL Client Denison Mines USA Corp Project 1st Quarter Groundwater Sample ID C09020169-OOIGMS Surr 2-Dichlorobenzene-d4 Surr Dibromofluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 Run GCMS2_090206A 20 113 80 120 20 108 70 130 20 116 80 120 20 116 80 120 Report Date 03/05/09 Work Order C09020234 Benzene Carbon tetrachloride Chloroform mp-Xylenes o-Xylene Toluene Xylenes Total Surr 2-Dichlorobenzene-d4 Surr Dibromouluoromethane Surr p-Bromofluorobenzene Surr Toluene-d8 20 102 20 106 20 111 20 99 20 105 20 104 20 102 20 112 20 109 20 115 20 117 Run GCMS2_090206A 02/06109 1954 70 130 8.2 20 70 130 12 20 70 130 9.1 20 70 130 12 20 70 130 13 20 70 130 12 20 70 130 12 20 80 120 10 70 130 10 80 120 10 80 120 10 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method 5W8260B Batch Ri 14452 Sample Matrix Spike Sample ID C09020169-OOIGMSD Sample Matrix Spike Duplicate 02/06/09 1916 200 ug/L 210 ug/L 220 ug/L 200 ug/L 210 ug/L 210 ug/L 410 ug/L Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d Pa g e of PL E A S E PR I N T - Pr o v i d e as mu c h in f n r m a t i n n po s s i b l e __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Co m p a n y Na m e Pr o j e c t Na m e PW S Pe r m i t Et c -- Sa m p l e Or i g i n EP A / S t a t e Co m p l i a n c e e- I f s o r % YY \ tv s g S /. f r 4_ _ A0 St a t e tA L C Ye s No Re p o r t Ma i l Ad d r e s s Co n t a c t Na m e Ph o n e / F a x Em a i l Sa m p l e r Pl e a s e Pr i n t /9 . 0 Sc % a- -I 2 J m c r ta y - zz e cp i a w i _i i C 4a Wc e Co n t a c t Ph o n e Pu r c h a s e Or d e r Qu o t e o f l l e Or d e r In v o i c e Ad d r e s s -i t Ae r 2a a f Sp e c i a l R e p o r t / F o r m a t s EL I mu s t be no t i f i e d Co n t a c t EL I pr i o r to 5p p e by pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g RU S H sa m p l e su b m i t t a l fo r ch a r g e s an d co o sc h e d u l i n g S e e In s t r u c t i o n Pa g e It LI DW A2 L A Co m m e n t s Re c e i g te m p LI GS A LI ED D / E D T E l e c t r o n i c Da t a 5O l ji S/ oi y 4 e LI PO T W I W W T P Fo r m a t No LI St a t e LI LE V E L IV 14 cu s t o d y Se a l Do DO t h e r LN E L A C Bo t t l e s co o l e r s \f In t a c t fv MA T R I X i. e r t s . 4 L Sig n a t u r e SN SA M P L E ID E N T I F I C A T I O N Co l l e c t i o n C o l l e c t i o n Na m e Lo c a t i o n In t e r v a l et c Da t e Ti m e Ma t c h un L_ 2/ 2 / 0 1 O- i - 3m w z c // o 1W 40 4 w 2 6 Z/ 2 / 0 7 5m w n 2/ 3 / o f PS I 1Q 6/ 4 J 3 p 2/ 3 / 0 9 fl 4- t a L_ _ 7f l w c f 2/ s / o f 11 f l 4- . i am 2/ 2 / f l i3 s 2 6- t o mh I b C 2/ 2 / 0 7 ra - pr i i i i J 0j 4 F f Sig n a t u r e us dy Ra t i u l s h e d by nt D4 e J T i m e /4 7 Re c o r d Ka e r t 2/ Sig n a t u r e Da t e / l i m e Sig n MU S T be Re c e i v e d by pr i n t ig ne d Sa m p l e Dis p o s a l Re t u r n to Cli e n t La b Dis p o s a l Re c e i v e d by La b o r a t o r y Da t e / l i m e Sig n a t u r e EN I R G Y IA / / V / / A / I If / / f In ce r t a i n ci r c u m s t a n c e s sa m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s In c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to co m p l e t e th e an a l y s i s re q u e s t e d Th i s se r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n t r a c t da t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l re p o r t Vis i t ou r we b si t e at ww w . e n e r p y l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s Energy Laboratories Inc VVo rkorde Receipt Checklist Denison Mines USA Corp C09020234 Login completed by Kimberly Humiston Date and Time Received 2/5/2009 930 AM Reviewed by Received by pb Reviewed Date Carrier name Next Day Air Shipping container/cooler in good condition Yes No Not Present Custody seals intact on shipping container/cooler Yes No Not Present custody seals intact on sample bottles Yes No Not Present chain of custody present Yes El No chain of custody signed when relinquished and received Yes No chain of custody agrees with sample labels Yes No Samples in proper container/bottle Yes No Sample containers intact Yes No Sufficient sample volume for indicated test Yes El No All samples received within holding time Yes El No Container/Temp Blank temperature 3C On Ice Water VOA vials have zero headspace Yes El No No VOA vials submitted Water pH acceptable upon receipt Yes No Not Applicable Contact and Corrective Action Comments None 1st Quarter Groundwater Date 05-Mar-09 CASE NARRATIVE CLIENT Project Sample Delivery Group C09020234 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceed days SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 02118CA Oregon WY200001 Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energylab.com ENERGY LABORA TORIES Denison Mines USA Corp ENERG VLABORA TORIES INC p2393 Sail Creek HIbway 82601 P0 Box 3258 Caspa WY82602 Toll Free 885235 0515 307235.0515 Fax 307234.1639 casperenergy/ab.com www.energylab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT -EASORA TORIES iw ENERGYLASORA TORIES 2393 Se/I eekHqhwey 82607 RC Box 3255 Caspc WY82602 Toll Free 888.235.0515 30724 Y15 FaK 307234.1539 casperenergy/eb.co4 ww.energy/ab corn ANALYTICAL SUMMARY REPORT March 112009 Denison Mines USA Corp 6425 Hwy 191 Blanding UT 84511 Workorder No C09020662 Quote ID C1640 POC Wells Monthly Groundwater Sampling Project Name 1st Quarter Groundwater Energy Laboratories Inc received the following samples for Denison Mines USA Corp on 2/18/2009 for analysis Sample ID Client Sample ID Collect Date Receive Date Matrix Test C09020662-001 MW-lI 02/16/09 1322 02/18/09 Aqueous Metals by ICP/ICPMS Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen Ammonia Nitrogen Nitrate Nitrite pH Gross Alpha minus Rn222 and Uranium Solids Total Dissolved Sulfate SW82608 VOCs Standard List C09020662-002 MW-27 02/16/09 1102 02/18/09 Aqueous Same As Above C09020662-003 MW-b 02/18109 1322 02/18/09 Aqueous Same As Above C09020662-004 Trip Blank 02116/09 1322 02/18/09 Aqueous SW82608 VOC5 Standard List As appropriate any exceptions or problems with the analyses are noted in the Laboratory Analytical Report the QNQC Summary Report or the Case Narrative If you have any questions regarding these tests results please call Report Approved By SthtZ2 UidAAf rrr-wz ENERGYLASORA TORIES PC 2393 Sail CceekHqfl way 52501 RO Sex Sqr Caspe1c WV82502YS14lb//Free 8582350515 30724 115 Far 307234.1639 casperenecgy/ab.ce ww.energy/ab corn QA/QC Summary Report Client Denison Mines USA Corp Project 1st Quarter Groundwater Analyte Method A2320 Sample ID MBLK-1 Alkalinity Total as CaCO3 Carbonate as C03 Bicarbonate as HCO3 Count Result Units Method Blank ND mg/L ND mg/L ND mg/L RL %REC Low Limit High Limit Run MANTECH_090220A 0.2 Report Date 03/11/09 Work Order C09020662 RPD RPDLimit Qual Batch R114972 0211 9/09 1255 Sample ID LCS-1 Alkalinity Total asCaCO3 Laboratory Control Sample 195 mg/L 1.0 97 Run MANTECH_090220A 02/19/09 1302 90 110 Sample ID C09020662-OO3AMS Alkalinity Total as CaCO3 Sample Matrix Spike 427 mgIL 1.0 98 Run MANTECH_090220A 02/19/09 1816 80 120 Sample ID C09020662-OO3AMSD Alkalinity Total as CaCO3 Sample Matrix Spike Duplicate 430 mg/L 1.0 100 Run MANTECH_090220A 02/19/09 1823 80 120 0.7 20 Method A2540 Sample ID MBLK2_090219 Solids Total Dissolved TDS 180 Method Blank ND mg/L Batch 090219 1fiLDS-TDS-W Run BAL-1j390219A 02/19/09 1403 Sample ID LCS2_090219 Solids Total Dissolved TDS 180C Laboratory Control Sample 1020 mg/L 10 102 Run BAL-1_090219A 02/19/09 1404 90 110 Sample ID C09020662-OOIAMS Solids Total Dissolved TDS 180 Sample Matrix Spike 3940 mg/L 10 102 Run BAL-1_090219A 02/19/09 1405 90 110 Sample ID C09020662-OOIAMSD Solids Total Dissolved TDS 180 Sample Matrix Spike Duplicate 3930 mg/L 10 101 Run BAL-1_090219A 02/19/09 1405 90 110 0.3 10 Method A4500-Cl Batch 090227A-CL-TTR-W Sample ID MBLK9-090227A Chloride Method Blank ND mg/L 0.4 Run TITRATION_090227A 02/27/09 1102 Sample ID LCS3S-090227A Chloride Laboratory Control Sample 3560 mg/L 1.0 101 Run TITRATION_090227A 02/27/09 1155 90 110 Sample ID C09020662-OO2AMS Chloride Sample Matrix Spike 75.8 mg/L 1.0 99 Run TITRATION_090227A 02127/09 1252 90 110 Sample ID C09020662-OO2AMSD Chloride Sample Matrix Spike Duplicate 76.2 mg/L 1.0 100 Run TITRATIONfi9O227A 02/27/09 1253 90 110 0.5 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration LASORA TORIES ENERG VLASORATORIES/C -2393 Salt CreekHi/7way 9250 -20 Box 32fl Caspe4 WY82602 ____________Toll Free 885.235.0515 30Z2i 7/5 Fax 307234.1539 casper5energy/ab.coi ww energy/aS corn QAIQC Summary Report Client Denison Mines USA Corp Project 1st Quarter Groundwater Report Date 03/11/09 Work Order C09020662 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLImit Qual Method A4500-F Sample ID MBLK-1 Method Blank Fluoride ND mg/L 0.05 Batch Ri 15062 Run MANTECH_090223A 02/23/09 1137 Sample ID C09020662-OO3AMS Sample Matrix Spike Fluoride 1.57 mg/L 0.10 102 Run MANTECH_090223A 02/23/09 1158 80 120 Sample ID C09020662-OO3AMSD Sample Matrix Spike Duplicate Fluoride 1.57 mg/L 0.10 102 Run MANTECI4_090223A 02/23/09 1201 60 120 10 Sample ID LCS Laboratory Control Sample fluoride 0.980 mg/L 0.10 98 Run MANTECH_090223A 02/23/09 1306 90 110 Method A4500-H Sample ID ICVI_090218_4 Initial Calibration Verification Standard pH 6.67 s.u 0.010 100 Analytical Run ORION55SA_090218D 02/16/09 1511 96 102 Method A4500-H Sample ID C09020668-OO2ADUP Sample Duplicate pH 7.73 s.u 0.010 Batch 090216_4_PH-W_555A-1 Run 0R10N555A_090218D 02/18/09 1545 10 Method A4500-NH3 Sample ID MBLK-1 Method Blank Nitrogen Ammonia as ND mg/L 0.02 Batch RI 15462 Run TECHNICON_090304A 03/04/09 0906 Sample ID LCS-2 Laboratory Control Sample Nitrogen Ammonia as 21.5 mg/L 0.20 107 Run TECHNICON_090304A 03/04/09 0908 80 120 Sample ID C09020623-OOIEMS Sample Matrix Spike Nitrogen Ammonia as 1.79 mg/L 0.050 85 Run TECHNICON_090304A 03/04/09 0920 80 120 Sample ID C09020623-OOIEMSD Sample Matrix Spike Duplicate Nitrogen Ammonia as 1.77 mg/L 0.050 64 Run TECHNICON_090304A 03/04/09 0922 80 120 1.1 20 Method A4500-S04 Sample ID LCS-1_090226 Laboratory Control Sample Sulfate 4920 mg/L 59 102 Batch 090226_I_S04-TURB-W Run TURB-2_090226A 02/26/09 1312 90 110 Sample ID MBLK-1fi90226 Method Blank Sulfate ND mg/L 0.6 Run TURB-2_0g0226A 02/26/09 1312 Sample ID C09010878-OOIAMS Sample Matrix Spike Sulfate 202 mg/L 2.9 103 Run TURB-2_090226A 02/26/09 1319 90 110 Sample ID C09010878-DO1AMSD Sample Matrix Spike Duplicate Sulfate 203 mg/L 2.9 104 Run TURB-2_090226A 02/26/09 1322 90 110 0.5 10 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration ENERGVLASORA TORIES 2393 SaIl CreekHihway 82601 P0 Box ar Casper WY82602 ____________Toll Free 886.235.0515 3072 515 Fax 307234.1839 casperªenergy/ab.ool wwenergyfab.com IiABORA TORIES QAIQC Summary Report Method E200.7 Sample ID LRB Calcium Iron Magnesium Potassium Sodium Sample ID LFB Calcium Iron Magnesium Potassium Sodium Sample ID C09020698-OO3BMS Calcium Iron Magnesium Potassium Sodium mg/i mg/L 0.4 mg/L ND mgIL ND mg/L Laboratory Fortified Blank 25.2 mg/L 2.52 mg/L 25.3 mg/L 24.7 mg/i 25.2 mg/L 0.02 0.0004 0.01 0.005 0.006 1.0 0030 1.0 1.0 1.0 Run ICP3-C_090305C 99 80 120 99 80 120 100 80 120 99 80 120 101 80 120 Run ICP3-C_090305C 97 70 130 97 70 130 101 70 130 90 70 130 88 70 130 Run ICP3-C090305C 106 70 130 98 70 130 105 70 130 91 70 130 91 70 130 03/05/09 2108 2.9 20 1.3 20 2.4 20 1.6 20 1.4 20 Qualifiers Ri Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit Client Denison Mines USA Corp Project st Quarter Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Report Date 03/11109 Work Order C09020662 Method Blank 0.4 0.05 Run ICP3-C_090305C Batch R115546 03/05/09 1340 03/05/09 1345 03/05/09 2103 0.50 0.030 0.50 0.50 0.50 1.0 0.030 1.0 1.0 1.0 Sample Matrix Spike 771 mg/L 2.49 mg/L 392 mg/L 240 mg/L 440 mg/i Sample ID C09020698-OO3BMSD Sample Matrix Spike Duplicate Calcium 794 mg/L Iron 2.52 mg/L Magnesium 402 mg/i Potassium 244 mg/i Sodium 446 mg/L ENERGVLABORA TORIES P2393 Sail creek Hqhway 82501 RO Sax3r Caspac WV82502 ____________To//Free 858.235.0515 3072 115 Faa 3072341639 caspeSnergy/ab.coi ww.energy/ab.com LABORATORIES QA/QC Summary Report Sample ID LRB Arsenic Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Method Blank ND mg/L ND mg/L ND mglL ND mg/L ND mglL ND mgIL ND mg/L ND mg/L ND mg/L ND mgIL ND mgIL ND mg/L ND mg/i ND mg/L ND mgiL ND mg/L 0.0003 mg/L Sample ID C09020662-0033MS4 jj Sample Matrix Spike Arsenic 0.0520 mg/L Cadmium 0.0500 mg/L Chromium 0.0490 mg/L Cobalt 0.0462 mg/L Copper 0.0466 mg/L Lead 0.0509 mglL Qualifiers 0.0003 6E-05 BE-OS 0.00010 4E-05 2E-05 SE-OS 4E-05 4E-05 9E-05 0.001 2E-05 3E-05 0.0001 BE-OS 9E-05 6E-05 Run ICPMS2-C_090220A 70 130 70 130 70 130 70 130 70 130 70 130 Client Denison Mines USA Corp Project lot Quarter Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E200.8 Report Date 03/11/09 Work Order C09020662 Run ICPMS2-C_090220A Run ICPMS2-C_090220A 100 85 115 101 85 115 100 85 115 100 65 115 96 85 115 100 as us 100 85 115 104 85 115 99 85 115 99 85 115 97 85 115 99 85 115 100 85 115 100 85 115 98 85 115 100 85 115 104 85 115 Sample ID LFB Arsenic Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Batch R115019 02/20/09 1341 02/20109 1348 02/20109 1835 it Laboratory Fortified Blank 0.0501 mgIL 0.0506 mg/i 0.0500 mg/i 0.0499 mg/i 0.0492 mg/L 0.0500 mg/i 0.0498 mg/i 0.00520 mg/i 0.0497 mg/L 0.0493 mg/i 0.0487 mg/i 0.0199 mg/i 0.0500 mg/i 0.0500 mg/L 0.0492 mg/i 0.0500 mg/i 0.0525 mg/i 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0014 0.0010 0.0010 0.0010 0.00030 0.0010 0.0010 0.0010 0.010 0.050 0.010 0.010 0.050 103 100 95 92 92 102 Ri Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit ENERO VLASORA TORIES IaIa 2393 SaIl CreekHi way 52501 -AU Sax ar Caspe WY52502 ____________Toll Free 593235.0515 307.2 575 Fax 307234.1539 caspetenergylab.col ww.energyla corn L4RORA TORIES QA/QC Summary Report Client Denison Mines USA Corp Report Date 03/11/09 Project 1st Quarter Groundwater Work Order C09020662 Analyte Count Result Units RL %REC Low Umit High Limit RPD RPDLimit Qual Method E200.8 Batch R115019 Sample ID C09020662-003BMS4 Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc ji Sample Matrix Spike 0.116 mg/I 0.00519 mg/L 0.0537 mg/L 0.0467 mg/L 0.0499 mg/I 0.01 29 mg/I 0.0511 mg/I 0.0420 mg/I 0.0539 mg/I 0.0497 mg/I 0.0518 mg/I 0.010 0.0010 0.10 0050 0.0010 0.010 0.10 0.10 0.00030 0.10 0.010 93 104 103 93 99 64 102 84 107 98 99 Run ICPMS2-C_090220A 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 02/20/09 1835 Sample ID C09020662-OO3BMSD Arsenic Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample Matrix Spike Duplicate 0.0492 mg/L 0.0495 mg/L 0.0490 mg/I 0.0470 mg/L 0.0456 mg/L 0.0507 mg/I 0.117 mg/I 0.00516 mg/I 0.0536 mg/I 0.0446 mg/I 0.0473 mg/L 0.0135 mg/I 0.0510 mg/I 0.0428 mg/I 0.0529 mg/I 0.0502 mg/I 0.0499 mg/L 0.0010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.10 0.050 0.0010 0.010 0.10 0.10 0.00030 0.10 0.010 98 99 96 94 90 101 96 103 103 89 94 68 102 86 105 99 96 Run ICPMS2-CjJ90220A 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 5.5 1.6 2.2 0.4 1.2 0.5 5.4 4.8 1.9 3.7 02/20/09 1842 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Method E200.8 Batch R115117 Sample ID IRB Beryllium Method Blank ND mg/L SE-OS Run ICPMS2-C_090223A 02/23/09 1416 Sample ID IFB Beryllium laboratory Fortified Blank 0.0478 mg/I 0.0010 96 Run ICPMS2-C_090223A 85 115 02/23/09 1423 Sample ID C09020720-006BM54 Beryllium Sample Matrix Spike 0.0503 mg/L 0.010 101 Run ICPMS2-C_090223A 70 130 02/24/09 0351 Sample ID C09020720-OO6BMSD Beryllium Sample Matrix Spike Duplicate 0.0489 mg/I 0.010 98 Run ICPMS2-Cfi90223A 70 130 2.7 02/24/090358 20 Qualifiers RI Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits tAaOp TORIES rar ENERGYLASORA TORIES PV 2393 Sail Creek/-/ihway 82501 RU Boxa2r Caspei WY82502LSZALSTollFree 888.235.0515 30Z24 75 Far 30Z234 1639 caspeitenecgy/atzcori ww.energy/aLz corn QAIQC Summary Report Client Denison Mines USA Corp Project 1st Quarter Groundwater Report Date Work Order 03/11/09 C09020662 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method E353.2 Sample 10 MBLK-1 Method Blank Nitrogen NitrateNrite as ND mg/L 0.03 Run TECHNICONO9O225A Batch R115175 02125/09 1304 Sample ID LCS-2 Laboratory Control Sample Nitrogen NitrateNitiite as 2.42 mg/L 0.10 94 Run TECHNICON_090225A 90 110 02/25/09 1307 Sample ID C09010878-OO4AMS Sample Matrix Spike Nitrogen NitrateNitrite as 3.84 mg/L 0.10 fi Run TECHNICON_090225A 90 110 02/25/09 1322 Sample ID C09010878-OO4AMSO Sample Matrix Spike Duplicate Nitrogen NitrateNitrite as 3.73 mg/L 0.10 76 Run TECHNICON_090225A 90 110 2.9 02/25/09 1324 10 Method E900A Batch GA-021 Sample ID MB-GA-0217 Method Blank Gross Alpha minus Rn pCi/I Gross Alpha minus Rn Precision 0.5 pCi/L Gross Alpha minus Rn MDC 0.4 pCI/L Run G5000W_090304A 03/06/09 1646 Sample ID LCS-GA-0217 Laboratory Control Sample Gross Alpha minus Rn 27.SpCi/L 101 Run G5000W_090304A 70 130 03/06/09 1648 Sample ID TAP WATER-MS Sample Matrix Spike Gross Alpha minus Rn 26.2pCi/L 101 Run G5000W_090304A 70 130 03/06/09 1648 Sample ID TAP WATER-MSD Sample Matrix Spike Duplicate Gross Alpha minus Rn 27.2pCi/L 97 Run G5000Wj390304A 70 130 3.6 03/06/09 1648 23.9 Qualifiers RL Analyte reporting limit ND Not detected at the reporting limit MDC Minimum detectable concentration Spike recovery outside of advisory limits ENERG VLABORI4 TORIES 2393 Saft Creak Hiqbway 82601 RC Sax ar Caspac WY82602 ____________Toll Free 86623511515 3O72 P15 Fax 307.234.1639 casperenerqy/ab.cod ww.energy/ab.corn LABORATORIES QA/QC Summary Report Client Denison Mines USA Corp Report Date 03/11/09 Project 1st Quarter Groundwater Work Order C09020662 Sample ID 24-FEB-09_MBLK_21 16 Method Blank Acetone Benzene Carbon tetrachioride Chloroform Chioromethane mp-Xylenes Methyl ethyl ketone Methylene chloride Naphthalene o-Xylene Toluene Xylenes Total Sum 2-Dichlorobenzene-d4 Sum Dibromofluoromethane Sun p-Bromofluorobenzene Surr Toluene-d8 1.0 112 80 120 1.0 103 70 130 1.0 113 80 120 1.0 107 80 120 Sample ID C09020717-OOIGMS fl Sample Matrix Spike Benzene 240 ugfL Carbon tetrachlonide 240 ug/L Chloroform 250 ugIL mp-Xylenes 230 ugIL o-Xylene 240 ug/L Toluene 230 ug/L Xylenes Total 460 uglL Surm 2-Dichtorobenzene-d4 Run GCMS2_090224A 20 118 70 130 20 120 70 130 20 126 70 130 20 113 70 130 20 119 70 130 20 116 70 130 20 116 70 130 20 112 80 120 02125/09 0457 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDL1mit Batch Qual R115168MethodSW8260B Sample ID 24-FEB-09_LCSJ8 Laboratory Control Sample Run GCMS2_090224A 02/24109 2159 Acetone 93 ug/L 20 93 70 130 Benzene 11 ugIL 1.0 109 70 130 Carbon tetrachloride 10 uglL 1.0 102 70 130 Chloroform 10 ug/L 1.0 105 70 130 Chloromethane 11 ugIL 1.0 110 70 130 mp-Xylenes 21 ugIL 1.0 107 70 130 Methyl ethyl ketone 90 ug/L 20 90 70 130 Methylene chloride 11 ug/L 1.0 109 70 130 Naphthalene 9.1 ug/L 1.0 91 70 130 o-Xylene 11 ug/L 1.0 108 70 130 Toluene 11 ug/L 1.0 108 70 130 Xylenes Total 32 ug/L 1.0 107 70 130 Sum 2-Dichlorobenzene-d4 1.0 110 80 120 Sum Dibromouluoromethane 1.0 102 70 130 Sum p-Bromofluorobenzene 1.0 105 80 130 SurrToluene-d8 1.0 109 80 120 Run GCMS2_090224A 02124/09 2354 ND ug/L 20 ND ug/L 1.0 ND ug/L 1.0 ND ug/L 1.0 ND ug/L 1.0 ND ugIL 1.0 ND ug/L 20 ND ugIL 1.0 ND ug/L 1.0 ND ugIL 1.0 ND ug/L 1.0 ND ug/L 1.0 ND Not detected at the reporting limit ENERGVLABORA TORIES p2393 Sail CreekI1/iway 82601 RO Sox32P Caapec WY82602LLMtSSTailFree688.2350515 3072z 115 Fan 3072341639 caspei4energyfaAcai wweuergy/ab.aam LABORATORIES Client Denison Mines USA Corp Project 1st Quarter Groundwater QAIQC Summary Report Method SW8260B Sample ID C09020717-OOIGMS jj Sample Matrix Spike Surr Dibromouluoromethane Sun p-Bromofluorobenzene urn Toluene-d8 Qualifiers RL Analyte reporting limit MDC Minimum detectable concentration ND Not detected at the reporting limit LA11 Count Result Units RL %REC Low Limit High Limit Report Date 03/11/09 Work Order C09020662 Sample ID C09020717-OOIGMSD il Sample Matrix Spike Duplicate Benzene Carbon tetrachloride Chloroform mp-Xylenes o-Xylene Toluene Xylenes Total Sum 2-Dichlorobenzene-d4 Sum Dibromofluoromethane Surr p-Bromofluorobenzene Sum Toluened8 230 ug/L 240 ug/L 250 ug/L 220 ug/L 230 ug/L 230 ug/L 450 ug/L 20 108 20 114 20 108 20 115 20 118 20 125 20 111 20 115 20 115 20 113 20 110 20 110 20 114 Run GCMS2_090224A 70 130 80 120 80 120 Run GCMS2_090224A 70 130 70 130 70 130 70 130 70 130 70 130 70 130 80 120 70 130 80 120 RPD RPDLimit Qual BatthR115168 02/25/09 0457 02/25/09 0535 2.7 20 1.3 20 0.6 20 2.1 20 3.4 20 0.3 20 2.8 20 10 10 10 1020 108 80 120 Ch a i n of Cu s t o d y an d An a l y t i c a l Re q u e s t Re c o r d Pa g e of PL E A S E PR I N T - Pr o v i d e as pi i r h in f n r n i 2 t i n n as po s s i b l e Co m o a n y Na m e Re p o r t Ma i l Ad d r e s s p. o . C c i c 8- 7 J3 1 1 4 n e l f r t c / LI WC / / In v o i c e Ad d r e s s Pr o j e c t Na m e PW S Pe r m i t Et c Sa m p l e Or i g i n rn n e tn t St a t e Co n t a c t Na m e Ph o n e / F a x Em a i l 4/ v v t c 4 hi r ZZ 2 - / rp a / m c n s e v e j In v o i c e Co n t a c t Ph o n e Pu r c h a s e Or d e r EP A / S t at e Co m p l i a n c e Ye s No Sa m p l e r Pl e a s e Pr i n t Qu o t e / B o t t l e Or d e r Sp e c i a l R e p o r t l F o r m a t s EL I mu s t be no t i f i e d pr i o r to sa m p l e su b m i t t a l fo r th e fo l l o w i n g LI DW LI A2 L A LI GS A LI ED D / E D T E l e c t r o r u c Da t a LI PO T W J W W T P Fo r m a t _ _ _ _ _ _ _ _ LI St a t e LI LE V E L IV LI Ot h e r LI NE L A C 12 w 2a o l to p or t to Co n t a c t EL I pr i o r to RU S H sa m p l e su b m i t t a l fo r ch a r g e s an d sc h e d u l i n g S e e In s t r u c t i o n Pa g e Sh i p p e d by Co o l e r ID s 4L e t t Co m m e n t s Re c e T e m p On Ic e 6W N 0 Cu s t o d y Se a l Bo t t l e s Co o l e r s In t a c t Ma t c h Sig n a t u r e Na m e Lo c a t i o n ln t e a I et c SA M P L E ID E N T I F I C A T I O N Da t e Co l l e c t i o n Ti m e Co l l e c t i o n MA T R I X ni - l / 2V 3 2 7 - 9/ o o 9 2J h f 2. 1 6 2 - c o t 3Z t 13 1 % 11 6 2 6- -U Co c \ b 10 r_ _ _ _ _ Re c e i v e d b y p r i n t oa i T h 1 Sig n a t u r e cu s t o d y ii n j i s h e d br t p r 4 o oa t e r r i m e /3 t Re c e i v e d by pr i n t Da l e / T i m e Re c o r d Re i i n t i s h e d by pr i n t Da t e / T i m e Sig n a l MU S T be l Si g n e d Sa m p l e Dis p o s a l Re t u r n to Cli e n t La b Dis p o s a l by La b o r a t o r y Da t e / T i m e In ce r t a i n ci r c u m s t a n c e s s a m p l e s su b m i t t e d to En e r g y La b o r a t o r i e s I n c ma y be su b c o n t r a c t e d to ot h e r ce r t i f i e d la b o r a t o r i e s in or d e r to co m p l e t e th e an a l y s i s re q u e s t e d Th i s se r v e s as no t i c e of th i s po s s i b i l i t y All su b - c o n t r a c t da t a wil l be cl e a r l y no t a t e d on yo u r an a l y t i c a l r e p o r t Vis i t ou r we b si t e at ww w . e n e r g y l a b . c o m fo r ad d i t i o n a l in f o r m a t i o n do w n l o a d a b l e fe e sc h e d u l e fo r m s an d li n k s EN R G LA S O / A 7 X R 1 E 5 Energy Laboratories Inc I1o rko rde Receipt Cliec ki ist Denison Mines USA Corp C09020662 Login completed by Kimberly Humiston Date and Time Received 2/18/2009 930 AM Reviewed by Received by pb Reviewed Date Carrier name Next Day Air Shipping container/cooler in good condition Yes No fl Not Present custody seals intact on shipping container/cooler Yes El No Not Present custody seals intact on sample bottles Yes No Not Present Jj chain of custody present Yes El No chain of custody signed when relinquished and rece Wed Yes No chain of custody agrees with sample labels Yes fJ No Samples in proper container/bottle Yes No Sample containers intact Yes El No Sufficient sample volume for indicated test Yes El No All samples received within holding time Yes No container/Temp Blank temperature 2C On Ice water VOA vials have zero headspace Yes No fl No VOA vials submitted water pH acceptable upon receipt Yes El No Not Applicable Contact and Corrective Action Comments None ENERS VLASORA TORIES ji 2393 Salt CreeRHiq/zway82601 Pa Sex 3.r Caspec PVV82502 re/I Free 888.235.0515 307.2i 15 Fax 307234.1639 casperenergy/ab.coA wwenergylab.cein tABO4 TORIES CLIENT Denison Mines USA Corp Date 11-Mar-09 Project 1st Quarter Groundwater CASE NARRATIVE Sample Delivery Group C09020662 ORIGINAL SAMPLE SUBMITTALS All original sample submittals have been returned with the data package SAMPLE TEMPERATURE COMPLIANCE 4C 2C Temperature of samples received may not be considered properly preserved by accepted standards Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as drinking water method for low TDS waters Data provided by this method for non potable waters should be viewed as inconsistent RADON IN AIR ANALYSIS The desired exposure time is 48 hours days The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay Maximum recommended delay between end of exposure to beginning of counting should not exceedS days SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated ATRAZINE SIMAZINE AND PCB ANALYSIS USING EPA 505 Data for Atrazine and Simazine are reported from EPA 525.2 not from EPA 505 Data reported by ELI using EPA method 505 reflects the results for seven individual Aroclors When the results for all seven are ND not detected the sample meets EPA compliance criteria for PCB monitoring SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required If so ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service Any such laboratories will be indicated within the Laboratory Analytical Report BRANCH LABORATORY LOCATIONS eli-b Energy Laboratories Inc Billings MT eli-g Energy Laboratories Inc Gillette WY eli-h Energy Laboratories Inc Helena MT eli-r Energy Laboratories Inc Rapid City SD eli-t Energy Laboratories Inc College Station TX CERTIFICATIONS USEPA WY00002 FL-DOH NELAC E87641 California 02118CA Oregon WY20000I Utah 3072350515 Virginia 00057 Washington C1903 ISO 17025 DISCLAIMER The results of this Analytical Report relate only to the items submitted for analysis ENERGY LABORATORIES INC CASPERWY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities Some results requested by the client may not be covered under these certifications All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin Please verify ELIs certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service For additional information and services visit our web page www.energylab.com THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT ORGANIC ANALYSIS REPORT Client Denison Mines Project ID Qrt Ground Water Lab Sample ID L88923-O1A Field Sample Ifl MW-i Collected 2/11/2009 100600 AM Received 2/13/2009 ANALYTICAL LABORATORIES Analysis Requested 8260B/503 OB 801 263-8686 Toll Free 888 263 8686 Fax 801263-8687 email awaltjawal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer Analytical Results Report Date 2/16/2009 Page of All analyses applicable ta lhe CWA SOWA and RCRA arc pcrforttsed in accordance to NELAC protocols Pertinent saitipling inforitiatios is located on the altochcd COC This report is provided for thin exclusive sisc of the addrcsscc truvilegcs 01 ssibscquicnt nsc of the souse ci this conspaoy or any utictuther at its stall or rcprodoction of this report in connection snuth the odvertiscosent promotion or sale of aoy proditct or process or io connection snith the rc psibhication ot this report for any porpose other tItan for the addressee mill be oraimtcd only on contact This company accepts oo rcspotmsibility except for the dttc pcrfoottaocc of inspection and/or analysis in good faith and according to the Riles of the trade and of science AMERICAN WEST Contact Steve Landau Analyzed 2/13/2009 72400 PM VOLATILES by GC/MS 8260B 463 West 3600 South Salt Lake City UT 84115 Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofuran 2.0 6.4 Sun 2-Dichloroethane-d4 81-143 99.2 Sun 4-Bromofluorobenzene 85-1 15 109 Sun Dibromofluoromethane 80-124 97.9 Sun Toluene-d8 80-125 104 ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88886-O1A Field Sample ID MW-3 Collected 2/9/2009 113200 AM Received 2/11/2009 Analyzed 2/13/2009 51400 AM Analytical Results VOLATILES by GC/MS 8260B Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofuran Sun l2-Dichloroethane-d4 2.0 81-143 3.8 109 Sun 4-Bromofluorobenzene 85-115 106 Sun Dibromofluoromethane 80-124 99.5 Sun Toluene-d8 80-125 103 Report Date 2/16/2009 Page of All analyses applicable to the CWA 5DWA and RCRA are perfontscd in accordance to NELAC protocols Pertinent satstpltng infonnattois is located on the attached COC This report is provided fnr the eselosive stse of the addressee Privileges of subsequent rise nf site naose of this coospany or any rtsesrsher of its staff or reprodsiction of this report in connection svtth the advertrseissent prorvatron or sale at any prodsiet ar process nr in connection svith the re publication of this report for any purpose other than for the addressee svrll be granted only on contact This company accepts no respoosmbmlmty escepu for the due perfonoance of inspection and/or analysis in good faith and according to tire nmles of the trade and of science AMERICAN WEST ANALYTICAL LABORATORIES Analysis Requested 8260B/5030B 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88886-02A Field Sample ID MW-3A Collected 2/9/2009 104000 AlvI Received 2/11/2009 Analyzed 2/13/2009 54000 AM Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydroftiran 2.0 2.0 Sun l2-Dichloroethane-d4 81-143 110 Sun 4-Bromofluorobenzene 85-115 108 Sun Dibromofluoromethane 80-124 100 Sun Toluene-d8 80-125 103 Report Date 2/16/2009 Page of All aealyses applicable to tlte CWA SOWA and RCRA arc perfoneed in accordance to NELAC protocols Pertinent sampling infoneatmon is located on the attached COC This report is provided for the evelosive ese oltlie addressee Privileges of sabseqoent use of the naitte of Ibis eenspany or any member of its staff or reprodsietion of this report in connection seah the advertiseittent promotion or sale of any prodoet or preeess or in cosseetion svith the re-pnhlmcation of this report for any purpose other than for the addressee mill be granted only on contact This company accepts no responsibility escept for the dne perfonnance of inspection and/or analysis in good faith and according to the mIen of the trade aed of science AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID Qrt Ground Water Lab Sample ID L88835-O1A Field Sample ID MW-S Collected 2/4/2009 120700 PM Received 2/6/2009 Analyzed 2/12/2009 34500 PM Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofliran 2.0 4.2 Sun 12-Dichloroethane-d4 81-143 114 Sun 4-Bromofluorobenzene 85-115 107 Sun Dibromo fluoromethane 80-124 101 Sun Toluene-d8 80-125 102 Report Date 2/16/2009 Page of All analyses applicable lathe CWA SDWA and RCRA arc pcrfonsied in accordance to NELAC prntocots Pertinent sanipling infoctttation is located an the aoaehed COC This report is pravided for the exelnsive use af the addressee Privileges of stibscqsient suse of the name of this company or any itteotber of its staff or rcprodtiction of this ceport in connection svith the advcrtisctttcnt promotion or sale of any pcoduict or pcoccss or in connection south the re-pablication of this report for any parpose other than for the addressee soill be granted only on contact This conipany accepts no responsihtlity except for the dtic pcrfonnaitcc of inspection and/or analysis in good faith and according to the roles of the trade and of science AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.cotn Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88969-O1A Field Sample ID MW-li Collected 2/16/2009 12200 PM Received 2/18/2009 Analyzed 2/18/2009 44500 PM Units p.g/L Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofliran 2.0 2.0 Sun 12-Dichloroethane-d4 81-143 112 Sun 4-Bromofluorobenzene 85-115 110 Sun Dibromofluoromethane 80-124 1101 Sun Toluene-d8 80-125 103 Report Date 2/19/2009 Page of All analyses applicable to the CWA 5OWA and RCRA are perfonned Sn accordance to NELAC prntncols Pertinent sampling tnfoeasatinn is Ineated on the aoaehed COC This repnrt is prneided far the exclusion nse of the addrnssnn frivdngns nf snbseqisait use af the attic nf this seitipany or any tonniber of to staff ni ieprndos.tien of tins rnpert snuncetion suith the adeertisaitinet pinntntinn ci sale nf any piadact ni pi neese snith the te-pstbhtcation of titis report far any perpose otlter titan fnr the addressee seth he granted only on centact This contpany accepts no responsihility eseept for the doe performance of inspection and/or analysis in good faith and according to the nles of thin trade and of science AMERICAN WEST ANALYTICAL LABORATORIES Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labscom Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Project ID Qrt Ground Water Lab Sample ID L88835-02A Field Sample ID MW-12 Collected 2/4/2009 15200 PM WEST Received 2/6/2009 Analysis Requested 8260B/5030B Analyzed 2/12/2009 41100 PM Report Date 2/16/2009 Page of All analyses applicable to the CWA 50WA and RCRA are pcrfonsscd in accordance to NELAC protocols Pertinent sampling infonnation is located an the attached COC This report is provided for the exelosive roe of the addressee Privileges ofsitbscqttcnt ttse of the nanie of this eotttpany or any oteniber of its staff or reproduction of this report in connection snith the ndvcrtisenient promotion or sale of any product or process or in connection svith the re-poblication of this report for any porpose other than for the addressee snill he granted only on contact This eontpany accepts no respoostbiltty eneept for the doe performttsnee of inspection and/or analysis in good faith and according to the roles of the trade and of science AMERICAN Contact Steve Landau Analytical Results VOLATILES by GC/MS 8260B ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.eom Kyle Gross Laboratory Director Jose Rocha QA Officer Units tg/L Dilution Factor Compound Reporting Limit Analytical Result Tetrahydroftiran 2.0 3.6 Sun l2-Dichloroethane-d4 81-143 112 Sun 4-Bromofluorobenzene 85-115 106 Sun Dibromofluoromethane 80-124 101 Sun Toluene-d8 80-125 102 ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID Qrt Ground Water Lab Sample ID L88835-03A Field Sample ID MW-14 Collected 2/4/2009 94000 AM Received 2/6/2009 Analyzed 2/12/2009 43700 PM Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydroflifan 2.0 2.0 Sun 2-Dichloroethane-d4 81-143 109 Sun 4-Bromofluorobenzene 85-115 105 Sun Dibromo fluoromethane 80-124 98.7 Sun Toluene-d8 80-125 102 Report Date 2/16/2009 Page of At analyses applicable 10 sIte CWA SDWA and RCRA are perforated in accordance to NELAC protocols Pertinent sanipling infonssstson is located on the noochcd COC This report is prodded for the cnclnsivc nsa of the addressee Pricilegas of snbscqticnt soc nf she nile of shis csrnspuny nr any sissnsbcr its staff sir rcprndtictiss 0f this rspsrt ti ssiisstoi wah ttis advcrtisciticst prosintins os sate of asy psodsst sir proscss Cliii cosscscos scab the rc-pnblscstios of this report for any pnrpnsc otiser tison for ihe addressee soil be granted only on contact This conspony accepts no responsibility accept for ihc dtsc parfonnonce of inspection and/or analysis in good tisth nod according to the roles of she trade and of science AMERICAN WEST ANALYTICAL LABORATORIES Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@uwal-labs.euin Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88809-O1A Field Sample ID MW-20 Collected 2/2/2009 11 1700 AM Received 2/5/2009 Analyzed 2/12/2009 11100 PM Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydroftiran 2.0 2.0 Sun 12-Dichloroethane-d4 81-143 113 Sun 4-Bromofluorobenzene 85-115 114 Sun Dibromofluoromethane 80-124 100 Sun Toluene-d8 80-125 103 Report Date 2/16/2009 Page of 10 All analyses applicable to the CWA 50WA and RCRA are perforitsed in accordasce to NELAC protocols Pertinent ssiitpliog iofontsatton is located on the aoaehed COC This report is pravided for the exelosise ttse of the addnrssee Privileges of subsequent ttse of the sante of thts cotispany or any isseniber of its statf or reprodoetloit of this report is connection uvith the adversisettient proitsotios or sale of any proditct or process or is connection svtth ttse re-ptihhicatios of this report for asy psirpose other thou for the addressee trill be granted only on contact Thts cotnpany accepts no rcspansibihity except for the dite perforitsanco of ituspectios andlor analysis to good faith and according to the Riles of the trade and of scu0000 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awalawaI-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88809-02A Field Sample ID MW-22 Collected 2/2/2009 102700 AM Received 2/5/2009 Analyzed 2/12/2009 13700 PM Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofuran 2.0 2.0 Sun 2-Dichloroethane-d4 81-143 113 Sun 4-Bromofluorobenzene 85-115 106 Sun Dibromofluoromethane 80-124 100 Sun Toluene-d8 80-125 102 Report Date 2/16/2009 Page of 10 All analyses applicable tn the CWA SOWA and RCRA arc perfaavcd in accardance ta NELAC pratacals Pertinent sainplin infavsatian is messed an the attached COC This repart is pravided far the excinsive ase aftlse addressee Privileges af ssbseqnent nsa af the nasty af this eaaipany ar any iveniber af its staff yr reprvductian af this repart in eannectinn svsllt the advertisement pramnatman ar sale at any pradtmct ar pracess ar in canvcctman svith the re-piiblieasman af this repart far any pitrpase ather thait far the addressee intl he granted anly an cantact This caampany accepts na respansibitity except far the due perfarmvance af ivspectias and/ar analysis in gaad faith and accardina ta the rules af the trade and af science AMERICAN WEST ANALYTICAL Analysis Requested 8260B/5030BLABORATORIES Analytical Results VOLATILES by GC/MS 8260B 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awaltyawal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID Qrt Ground Water Lab Sample ID L88923-02A Field Sample ID MW-23 Collected 2/11/2009 41400 PM Received 2/13/2009 Analyzed 2/13/2009 74900 PM Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydroftiran 2.0 2.0 Sum 2-Dichloroethane-d4 81-143 100 Sum 4-Bromofluorobenzene 85-115 108 Surr Dibromofluoromethane 80-124 97.6 Sum Toluene-d8 80-125 104 Report Date 2/16/2009 Page of All analyses applicable to the CWA 5OWA and RCRA are perfonaed in accordance to NELAC protocols Pertinent sampling information is located on the attached COC This report is pro ided for the excltisine use of the addressee trivtlegcs at snbseqnent ase of the nanie ot this coittpany or any member at its siatf or reprndsmctioit of this report in connection mutt the adnertiseistent protnotion or sale of any prodnet or process or in connection snub the re pmtblication of this report for any pnrpase other than for the addressee mill be gmnted only an contact This cnntpany accepts no responsibility except for tlte dtie perloanance of inspectiotm andlor analysis in mod faitit and accordiisg to the stiles of the tmde and of science AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 ORGANIC ANALYSIS REPORT Client Denison Mines Project ID Qrt Ground Water Lab Sample ID L88835-05A Field Sample ID MW-24 Collected 2/5/2009 81000 AM Received 2/6/2009 ANALYTICAL LABORATORIES Analysis Requested 8260B/5030B 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awa19awa1-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer Analytical Results Report Date 2/16/2009 Page of Alt analyses applicable ta the CWA 5OWA and RCRA are perfontied in accordance to NELAC protacals Pertiaeat sampling infortnalion ia located on the aOached COC This report is provided far the exclusive tine at the addressee Privtlees of nitbneqiteat one of the name of thin company or any inenuber of tin stall or reprodnetuoti at tins report in eonaeetuon snith the adverttaettient promotion or sale of any prodoet or process aria eoaneetuoa sntth there pnbheatuon of this report for any pnrpose other than for the addressee snilt be granted only on contact This eontpany accepts ito responsibility except for the doe perfonitanee of inspection and/or analysis in good faith and according to the mIen of the trade and of science AMERICAN WEST Contact Steve Landau Analyzed 2/12/2009 52800 PM VOLATILES by GC/MS 8260B 463 West 3600 South Salt Lake City UT 84115 Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofliran 2.0 2.0 Sun 2-Dichloroethane-d4 81-143 111 Sun 4-Bromofluorobenzene 85-115 107 Sun Dibromofluoromethane 80-124 99.3 Sun Toluene-d8 80-125 100 ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88809-03A Field Sample ID MW-25 Collected 2/3/2009 43700 PM Received 2/5/2009 Analyzed 2/11/2009 12700 AM Units Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofliran 2.0 2.0 Sun 2-Dichloroethane-d4 81-143 99.4 Sun 4-Bromofluorobenzene 85-115 115 Sun Dibromofluoromethane 80-124 96.4 Sun Toluene-d8 80-125 105 Report Date 2/16/2009 Page of 10 All analyses applicable ta the CWA 5OWA and RCRA are perforated is accordance to NhLAC protocols Pertinent saisspling information is lncascd on She aoached COC This report is presided for the exciiisivc sse of the addmssee Prisileoes at ssihscqnent nse ot the sanse at this eanspany or any member of its stall or reprodsctson at this report in connection svith the adsertisesient promotion or sate at any pradsei or process arm conseetias smith the re-poblication of this report for any parpose oilier than for the addressee mviii he granted only on contact This cossspany accepts no responsibility eseept for the dne pcrfaosiosee of inspection and/or analysis is good faith and according to the nuns of the trade and of science AMERICAN WEST ANALYTICAL LABORATORIES Analysis Requested 8260B/5030B Analytical Resnlts VOLATILES by GC/MS 8260B 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awauTgawal-labs.eom Kyle Gross Laboratory Director Jose Rocha QA Officer Kyle Gross Laboratory Director Jose Rocha QA Officer Analytical Results Report Date 2/16/2009 Page of 10 All analyses applicable to tite CWA 50WA and RCRA are perfontied in accordance to NELAC protocols Pertinent sanipling infaissiatian is located on the aoaehed COC This report it provided for the exclusive titc of ihe addressee trivtleges ol sttbseqnent use at the Sante ol this eoittpany or any inenther ot its stall or reprodtietion ol this report in connection ivith the advertusettuent promotion or sate ol any prodoet or process or in eonneetton tvith the re pablieatsnn of this report for any purpose other than far the addressee svill be ranted only an contact This company accepts no responsibility eseept far the due perfansmnnee of inspection and/or analysis in goad faith and according to the rules of the trade and of science Client Denison Mines Project ID 1St Qrt Ground Water Lab Sample ID L88809-04A AMERICAN Field Sample Tfl MW-26 Collected 2/2/2009 25000 PM WEST Received 2/5/2009 Analysis Requested 8260B/5030B ORGANIC ANALYSIS REPORT Contact Steve Landau Analyzed 2/12/2009 20200 PM VOLATILES by GC/MS 8260B ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Units jxg/L Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofliran 2.0 2.0 Sun 2-Dicliloroethane-d4 81-143 112 Sun 4-Bromofluorobenzene 85-115 112 Sun Dibromofluoromethane 80-124 102 Sun Toluene-d8 80-125 102 Client Denison Mines Project ID 1st Qrt Ground Water Lab Sample ID L88969-02A Field Sample ID MW-27 Collected 2/16/2009 110200 AM WEST Received 2/18/2009 ANALYTICAL ORGANIC ANALYSIS REPORT Contact Steve Landau Analyzed 2/18/2009 51100 PM Analysis Requested 8260B/5030BLABORATORIES Fax 801263-8687 email awa1awal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer Analytical Results Report Date 2/19/2009 Page of All analyses applicable to the CWA 5DWA and RCRA ore perforated is accordance to NELAC protocols Pertinent sampling infontsatiois is located on the anached COC This report is provided for the eaclnsive use of the addressee Privileges at subsequent nse oh the naitse oh this cnitspany or any nscummber ot its statt or reproduction oh this report in connection witit the advertusnuitont promotion or sole of ammy prndnct or process or in connection svith the rn-pnbhication of this report for any pnrpose other than for the addressee ivill be groittod only on contact This company accepts no responsibility encept for the dne perbormnonce of inspection and/or onalysis in good faith and according to the rules of the trade and of science AMERICAN 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 VOLATILES by GC/MS 8260B Units g/L Dilution Factor Compound Reporting Limit Analytical Result TetrahydrofUran 2.0 2.0 Sun 2-Dichloroethane-d4 81-143 112 Sun 4-Bromofluorobenzene 85-115 106 Sun Dibromofluoromethane 80-124 100 Sun Toluene-d8 80-125 102 ORGANIC ANALYSIS REPORT Kyle Gross Laboratory Director Jose Rocha QA Officer Lab Sample ID L88835-04A Field Sample ID MW-28 Collected 2/4/2009 41200 PM Received 2/6/2009 Analytical Results Report Date 2/16/2009 PageS of All analyses applicable to the CWA SDWA and RCRA aria perfanned in accordance to NLLAC protocols Pertinent sarnpliw infocittatron is located an the aoaehed COC This report is provided for the exelosive tise of the addressee trtetleges at stibseqtrent rise at the nante at thtn company ar any ieetttber af its stall ar reprodoetton af thtn report in connection seith the advertiseittent promotion ar sale af any prodoet or process aria connection svtth tite re-publication of thin report far any propose other thatt far the addreasee will be granted only an eantact This cotapany accepts na respansibihity eneept far the dtie perfonttanre af inspection and/ar analynis in goad taith and according to the rtrles of the trade and of science Client Denison Mines Project ID Qrt Ground Water Analysis Requested 8260B/5030B Contact Steve Landau Analyzed 2/12/2009 50200 PM VOLATILES by GC/MS 8260B AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-tabs.eom Units g/L Dilution Factor Compound Reporting Limit Analytical Result Tetrahydrofliran 2.0 2.0 Sun 2-Dicbloroethane-d4 81-143 110 Sun 4-Bromofluorobenzene 85-115 106 Sun Dibromofluoromethane 80-124 101 Sun Toluene-d8 80-125 102 ORGANIC ANALYSIS REPORT Client Denison Mines Contact Steve Landau Project ID 1st Qrt Ground Water Lab Sample ID L88809-05A Field Sample ID MW-29 Collected 2/3/2009 115100 AM Received 2/5/2009 Analyzed 2/11/2009 60900 AM Analysis Requested 8260B/5030B Analytical Results VOLATILES by GC/MS 8260B Units Dilution Factor Analytical Compound Reporting Limit Result Tetrahydrofliran 2.0 2.0 Sun 2-Dichloroethane-d4 81-143 102 Sun 4-Bromofluorobenzene 85-115 106 Sun Dibromofluoromethane 80-124 97.7 Sun Toluene-d8 80-125 102 Report Date 2/16/2009 Page of 10 All analyses appticable to the CWA 5DWA and RcRA are perfonired in accordance ta NELAc protocols Pertinent sampling infonoation is located an the altaehed COC This report is provided for the exclnsive nac of the addressee Privileges ofsnbseqoeoi ose of the name of this company or aoy ineoiber of its statT or reprodoetion of this report in connection with the advertiseineot promotion or sole ot aoy prodoet or process or in connection with the re-pohlication of this report for any porpose other than for the addressee mviii be ranted only on contact This coompany accepts no responsibility esccpt for the doe pcrforomance of inspection and/or analysis in pood faith and according to the niles of the trade and of science AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awalgawal-labs.eom Kyle Gross Laboratoiy Director Jose Rocha QA Officer February 16 2009 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Steve Landau Denison Mines 1050 17th Street 950 Denver CO 80265 TEL 303 389-4132 FAX 303 389-4125 Salt Lake City UT 84115 RE 1st Qrt Ground Water Dear Steve Landau Lab Set ID L88809 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awalipawal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer American West Analytical Labs received samples on 2/5/2009 for the analyses presented in the following report All analyses were performed in accordance to National Environmental Laboratory Accreditation Program NELAP protocols unless noted otherwise If you have any questions or concerns regarding this report please feel free to calL The abbreviation Surr found in organic reports indicates surrogate compound that is intentionally added by the laboratory to determine sample injection extraction and/or purging efficiency Thank you Approved by Laboratory Director or designee Report Date 2/16/2009 Page of 10 All analyses applicable to the CWA SOWA and RCRA are perforated in accordance to NELAC pralacols Pertinent sampling infonnation is located an the attached COC This repart is peas ided far thc exeinsive tine af the addressee Privtleges af stihseqtiens inc af the satise af this company ar any nteitsber at its stahT ar repradnetian af thts repan in eanneetios srith the advertisettteat preatosian or sale ef any pradtiet ar pracess aria eannectiaa svtth the re-ptiblieatian af this report far any purpose other than tar the addressee mill be granted only en contact This company accepts en responsibility eneept for the dim perfoottanee of inspection and/or analysis in gand faith and according to the niles of the trade and of science Digttally stgnod by Jose Rocha Jose oAmerican West Analytical Laboratories ouQAOch corn cUS Date 2009.02.16 164930 -07OO Am e r i c a n We s t An a l y t i c a l La b s WO R K OR D E R Su m m a r y Cl i e n t ID DE N 1 0 0 Pr o j e c t 1s t Qr t Gr o u n d Wa t e r Co m m e n t s QC L e v e l 05 - F e b - 0 9 Wo r k Or d e r L8 8 8 0 9 Co n t a c t St e v e La n d a u QC Le v e l Lo c a t i o n Sa m p l e ID Cli e n t Sa m p l e ID Co l l e c t i o n Da t e Da t e R e c e i v e d li l a / C Da t e Du e Ma t r i x Te s t Co d e Sto r a g e L8 8 8 0 9 - 0 1 A MW - 2 0 2/ 2 / 2 0 0 9 11 1 7 0 0 AM 2/ 5 / 2 0 0 9 2/ 1 9 / 2 0 0 9 Aq u e o u s S2 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 0 9 - 0 2 A MW - 2 2 2/ 2 / 2 0 0 9 10 2 7 0 0 AM 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 0 9 - 0 3 A MW - 2 5 2/ 3 / 2 0 0 9 43 7 0 0 PM 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 0 9 - 0 4 A MW - 2 6 2/ 2 / 2 0 0 9 25 0 0 0 PM 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C P r i d g e L8 8 8 0 9 - 0 5 A MW - 2 9 2/ 3 / 2 0 0 9 11 5 1 0 0 AM 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C P r i d g e L8 8 8 0 9 - 0 6 A MW - 3 0 2/ 3 / 2 0 0 9 10 0 2 0 0 AIv I 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 3 0 9 - 0 7 A MW - 3 1 2/ 3 / 2 0 0 9 21 7 0 0 PM 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 0 9 - 0 8 A MW - 3 2 2/ 2 / 2 0 0 9 15 2 0 0 PM 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U 3 T O M VO C P r i d g e L8 8 8 0 9 - 0 9 A MW - 6 5 2/ 1 9 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e Pa g e lo f OENISONAA MINES CHAIN OF CUSTODY Sheetl of -------_---_Samples Shipped to American West Analytical Lab 463 West 3600 South -Salt Lake City Ut 84115 Contact Ryan Palmer or David Turk Ph 435 678 2221 roalmerdenisonmines.com _______________________________dturkdenisonmines.com Chain of Custody/Sampling Analysis Request Project Samplers Name Samplers Signature Qrt Ground Water Tanner Holliday Sample ID Date Collected Time Collected Laboratory Analysis Requested MW2O 2/2/2009 1117 THF MW 22 2/2/2009 1027 THF MW 25 2/3/2009 1637 THF MW 26 2/2/2009 1450 THF MW 29 2/3/2009 1151 THF MW 30 2/3/2009 1002 THF MW 31 2/3/2009 1417 THF MW 32 2/2/200 1352 THF MW 65 2/2/2009 1352 THF Please nofify Ryan Palmer of Reciept tempature on these samples Immediately Thank you Relinquished By ignature i2 Re7uishdd BySignature/Z Date/Time k7yq Date/Tithe Received BySign to Received BySignature Date/Time Dae/Time La b Sc U D Sa m p l e s We r e CO C Ta p e Wa s Co n t a i n e r Ty p e No Re c %S h i p p e d By j0 5 Pr e p n t on Ou t e r Pa c k a g e Ye s No N/ A \A W A L Su p p l i e d Pl a s t i c Ha n d De l i v e r e d AV A L Su p p l i e d Cl e a r Gl a s s Am b i e n t dn b I o k e a oo Ou t e r pa c k a g e %Y e s No N/ A AW Su p p l i e d Am b e r Gl a s s KO h i l l e d AW A L \ p p l i e d VO A / T O C / T O X Vi a l s Am b e r le r He a d s p a c e No He a d s p a c e Te m p e r a t u r e Pr e s e n t on Sa m p l e Ye s No N/ A Un b r o k e n on Sa m p l e Re c Br o k e n / L e a k i n g Ye s No N/ A No t e s No n AW A L Sl i e d Co n t a i n e r No t e s Pr o p e r l y Pr e s e r v e d Ye s No N/ A DY e s _ _ O N o _ _ O N / A No t e s No t e s Re c Wi t h i n Ho l d AY e s No Dis c r e p a n c i e s Be t w e e n La b e l s an d C Ye s No No t e s No t e s Be t t l I y j p Pr e s e r v a t i v e Al l pH s OI C Am m o n i a H2 - S O 4 CO D Cy a n i d e p1 1 HO - PH 12 Na O H .. Me t a l s pH HN O 3 N0 2 N 0 3 pH 2 H 2 S 0 4 Nu t r i e n t s pH H2 S 0 4 OG pH 2 H C L _- - - - Ph e n o l s pH 11 2 3 0 4 Su l f i d e pH 9N a O H Zn A C TK N pH 2 H 2 S 0 4 TO C pH H3 P 0 4 TP O 4 pH 2 H 2 S 0 4 TP H pH HC L ._ _ _ Po u r sm a l l am o u n t of sa m p l e in th e sa m p l e id Po u r sa m p l e fr o m Lid ge n t l y ov e r wid e ra n g e p1 - 1 pa p e r Do No t dip th e pH pa p e r in th e sa m p l e bo t t l e o r lid If sa m p l e is no t pr e s e r v e d p r o p e r l y lis t it s ex t e n s i o n en d re c e i v i n g pH in th e ap p r o p r i a t e co l u m n ab o v e Fla g CO O an d no t i f y cli e n t fo r fu r t h e r i n s t r u c t i o n s Pla c e cli e n t co n v e r s a t i o n on CO C Sa m p l e s ma y be ad j u s t e d at cli e n t re q u e s t Pr o c e d u r e February 16 2009 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Steve Landau Denison Mines 1050 17th Street 950 Denver CO 80265 TEL 303 389-4132 FAX 303 389-4125 Salt Lake City UT 84115 RE Qrt Ground Water Dear Steve Landau Lab Set ID L88923 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awalawal-labs.corn Kyle Gross Laboratory Director Jose Rocha QA Officer American West Analytical Labs received samples on 2/13/2009 for the analyses presented in the following report All analyses were performed in accordance to National Environmental Laboratory Accreditation Program NELAP protocols unless noted otherwise If you have any questions or concerns regarding this report please feel free to call The abbreviation Surr found in organic reports indicates surrogate compound that is intentionally added by the laboratory to determine sample injection extraction and/or purging efficiency Thank you Approved by Laboratory Director or designee Report Date 2/16/2009 Page of All analyses applicable to the CWA 5DWA and RCRA arc pcrfonncd in accordance to NELAC protocols Pertinent narrtplrng infonnation is located on the aooehcd COC This report in pronided for rite exelnsivc tine of the addressee Prinilegen of subsequent Line of the nanre of thin conspany or any october of its starT or reprodoction of this report in connection scith the artvertiserrtcnt promotion or sale of any prorlimet or process or in connection snith there publication of thin report for any purpose other than for the addressee mciii he yranted only on contact Tins company accepts no responsibility eneept for the due perfonnanee of inspection and/or analysin in nood faith and according to the niles of the trade and of science Digitally signed by Kyle Gross DN cnKyle Cross 0AWAL 0uAWAL ro corn cUS Date 2009.02.17 081903 -0700 Am e r i c a n We s t An a l y t i c a l La b s WO R K OR D E R Su m m a r y 13 - F e b - 0 9 Wo r k Or d e r L8 8 9 2 3 Cl i e n t ID DE N 10 0 QC Le v e l Pr o j e c t Qr t Gr o u n d W a t e r Lo c a t i 9 n J Co n t a c t St e v e La u d a u Co m m e n t s QC L e v e l Sa m p l e 10 Cli e n t Sa m p l e ID Co l l e c t i o n Da t e Da t e R e c e i v e d Da t e Du e Ma t r i x Te s t Co d e Sto r a g e L8 8 9 2 3 - 0 1 A MW - I 2/ 1 1 / 2 0 0 9 10 0 6 0 0 AM 2/ 1 3 / 2 0 0 9 2/ 2 7 / 2 0 0 9 Aq u e o u s 82 6 0 - W - C U S T O M VO C F r i d g c VO C F r i d g e L8 8 9 2 3 - 0 2 A MW - 2 3 2/ 1 1 / 2 0 0 9 4 1 4 0 0 PM 2/ 2 7 / 2 0 0 9 82 6 0 - W - C U S T O M Pa g e lo f I W923 Sheeti of DENISON MINES CHAIN OF CUSTODY Samples Shipped to American West Analytical Lab 463 West 3600 South Salt Lake City Ut 84115 Contact Ryan Palmer or David Turk Ph 435 678 2221 roaImerdenisonmines.com _______________________________dturkdenisonmines.com Chain of Custody/Sampling Analysis Request 7 Project Samplers Name Samplers Signature Ground Water Tanner Holliday Sample ID Date Collected Time Collected Laboratory Analysis Requested MW-I 2/11/2009 1006 THF MW23 2/11/2009 1614 THF Please nofify Ryan Palmer of Reciept tempature on these samples Immediately Thank you Djte/jLme 2/7-o1 Received BySignature Date/Time RelicuishØd BySignature Date/Time Received BySignature J\iktLuJ Date/Time SL Sa m p l e s We r e Sl B p p e d By IJ \ R S CO C Ta p e Wa s Pr e s p a t oa Ou t e r Pa c k a g e Ye s No N/ A Co n t a i n e r Ty p e AW A L Su p p l i e d Pl a s t i c No A Ø c Ha n d De l i v e r e d AW A L Su p p l i e d Cl e a r Gl a s s .7 Am b i e n t Ua b i y k e n on Ou t e r pa c k a g e 1e s No N/ A AW A L Su p p l i e d Am b e r Gl a s s lc i l l e d AW A L Su p p l i e d VO A / T O C / T O y i i s Am b e r Cl e a r He a d s p a c e o He a d s p a c e Te m p e r a t u r e Pr e s e n t on Sa m p l e Ye s l1 4 N/ A Re c Br o k e n / L e a k i n g Ye s iA 4 o N/ A No n AW A L Su p p l i e d Ct i u e r No t e s Un b r o k e n on Sa m p l e DY e s ON o @4 A No t e s Pr o p e r l y Pr e s e r v e d No N/ A No t e s Re c wi t h i n I- b I d es No Dis c r e p a n c i e s Be t w e e n La b e l s an d CO C Ye s at I o No t e s No t e s Bo f l l e Ty p e Am m o n i a Pr e s e r v a t i v e pH H2 S 0 4 Al l pU s OK CO D pH 2 H 2 S 0 4 Cy a n i d e PH 1 2 N a O H Me t a l s pH 2 H N 0 3 N0 2 N 0 3 pH 2 H 2 S O 4 __ _ Nu t r i e n t s pH H2 S 0 4 OG pH 2 H C L Ph e n o l s pH H2 S 0 4 Su l f i d e pH 9N a O H Zn A C ._ _ _ _ TK N pH H2 S 0 4 TO C pH 2 H 3 P 0 4 TP O 4 pH H2 S 9 4 TP H pi AC L -- - - - Fo u r s m a l l am o u n t of sa m p l e in th e sa m p l e lid Fo u r sa m p l e fr o m Lid ge n t l y ov e r wid e ra n g e pH pa p e r Do No t dip th e pH pa p e r in th e sa m p l e bo t t l e o r lid If sa m p l e is no t pr e s e r v e d . p r o p e r l y lis t it s ex t e n s i o n an d re c e i v i n g pH in th e ap p r o p r i a t e co l u m n ab o v e Fla g CO C an d no t i f y cli e n t fo r fu r t h e r in s t r u c t i o n s Fla c e cli e n t co n v e r s a t i o n on CO C Sa m p l e s m a y be ad j u s t e d at c l i e n t re q u e s t La b Se t ID Fr o c e d u r e February 19 2009 AMERICAN WEST ANALYTICAL LABORATORIES Steve Landau Denison Mines 1050 17th Street 950 Denver CO 80265 463 West 3600 South Salt Lake City UT 84115 TEL 303 389-4132 FAX 303 389-4125 RE 1st Qrt Ground Water Dear Steve Landau Lab Set ID L88969 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer American West Analytical Labs received samples on 2/18/2009 for the analyses presented in the following report All analyses were performed in accordance to National Environmental Laboratory Accreditation Program NELAP protocols unless noted otherwise If you have any questions or concerns regarding tins report please feel free to call The abbreviation Sun found in organic reports indicates surrogate compound that is intentionally added by the laboratory to determine sample injection extraction and/or purging efficiency Thank you Approved by Laboratory Director or designee Report Date 2/19/2009 Page of All analyses applicable to the CWA 5OWA and RCRA arc perfonned in accordance to NELAC protacols Pertinent saospling infonsiation is located on the attached COC Tltis report is provided for the cxclnsivc tine of the addressee Privileges of stibscqticnt tine of the nannc of tins cottipaoy or any ineinther of its staff or rcprodnictnon at this report in connection nvith the advertisement proittotion or sale of any prodoct or process or in connection svith the rc-ptiblication of this report for any porpone other than for the addressee nvill be grnntcd only on contact This contpany accepts no responsibility cnccpt for the doe pcrfovtiance of iaspectioit and/or analysis in good faith and according to the ntlcs of the trade and of science Digitally signed by Kyle Gross DN cnKyle Gross oAWAL ouAWAL rc corn cUS Date 2009.02.19 155743 07i00i Am e r i c a n We s t An a l y t i c a l La b s WO R K OR D E R Su m m a r y 18 - F e b - 0 9 Wo r k Or d e r L8 8 9 6 9 Cl i e n t I D DE N 1 0 0 QC L e v e l Pr o j e c t 1s t Qr t Gr o u n d Wa t e r Lo c a t i o n Co n t a c t St e v e La n d a u Co m m e n t s QC L e v e I Sa m p l e ID Cli e n t Sa m p l e ID Co l l e c t i o n Da t e Da t e Re c e i v e d Da t e Du e Ma t r i x Te s t Co d e Sto r a g e L8 8 9 6 9 - O I A MW - i l 2/ 1 6 / 2 0 0 9 12 2 0 0 PM 2/ 1 8 / 2 0 0 9 3/ 4 / 2 0 0 9 Aq u e o u s 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 9 6 9 - 0 2 A MW - 2 7 21 1 6 / 2 0 0 9 11 0 2 0 0 Alv I 3/ 4 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 9 6 9 - 0 3 A MW - 7 0 2/ 1 6 / 2 0 0 9 12 2 0 0 PM 3/ 4 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e Pa g e lo f l DENISONOAA MINES CHAIN OF CUSTODY Sheetl of Samples Shipped to American West Analytical Lab 463 West 3600 South Salt Lake City Ut 84115 Contact Ryan Palmer or David Turk Ph 435 678 2221 roalmenWdenisonmines.com _____________________________dturkdenisonmines.com Chain of Custody/Sampling Analysis Request Project Samplers Name Samplers Signature Gd Ground Water Tanner Holliday Sample ID Date Collected Time Collected Laboratory Analysis Requested MW-il 2/16/2009 1322 THF MW-27 2/1 6/2009 1102 THF MW-TO 2/16/2009 1322 THF Please nofify Ryan Palmer of Reciept tempature on these samples Immediatelyl Thank you Relinquished BySignature Date/Time 27g Received BySignature Date/Time RetJgpshed BySignature Date/Time Received SySignatOrect Date/Time L// Sa m p l e s We r e CO C Ta p e Wa s -. . Q o n t a i n e r Ty p e No Re c hi p p e d B y iS Pr e s e n t on Ou t e r Pa c k a g e Ye s No N/ A AW A L Su p p l i e d Pl a s t i c Ha n d De l i v e r e d AW A C S i s p p l i e d Cl e a r Gl a s s Am b i e n t Un b 1 o k e n on Ou t e r pa c k a g e AW A L Su p p l i S 4 r n b e r Gl a s s Uh i l l e d $. Y e s No N/ A AW A L Su p p l i e d Vb A Q O C / T O X Vi a l s Am b e r Cle a r He a d s j 5 S 0 No He a d s p a c e Te m p e r a t u r e 1. 3 Pr e s e n t on Sa m p l e Ye s No N/ A Un b r o k e n on Sa n p l e Re c Br o k e n / L e a k i n g Ye s No N/ A No t e s No n AW A L Su p p l i e d on t a h N No t e s Pr o p e r l y Pr e s e r v e d 1Y e s No N/ A DY e s ON o N/ A No t e s No t e s Re c Wi t h i n H o l d JY e s No Dis c r e p a n c i e s Be t w e e n La b e l s an d CO C Ye s \ No No t e s No t e s Bf t l a - T Pr e s e r v a t i v e Al l pH s OK Am m o n i a CO D j2 H2 S O pH Th r S Q Cy a n i d e PH 12 Na O H Me t a l s pH CH N O 3 NO 2 N O 3 Nu t r i e n t s pH H2 S O 4 pH H2 S 0 4 OG pH 2 H C L .- Ph e n o l s pH H2 S O 4 Su l f i d e pH 9N a O H Zu A C TK N TO C pH 2 H 2 5 O 4 pH 2 H 3 P O 4 TP O 4 pH 2 H 2 S O 4 .- . - TP H pH 2 H C L Po u r sm a l l am o u n t of sa m p l e in th e sa m p l e lid Po u r sa m p l e fr o m Lid ge n t l y ov e r wid e ra n g e ph pa p e r Do No t dip th e ph pa p e r in th e sa m p l e bo t t l e or lid If sa m p l e is no t pr e s e r v e d . p r o p e r l y lis t it s ex t e n s i o n an d re c e i v i n g ph in th e ap p r o p r i a t e co l u m n ab o v e Fla g CO C an d no t i f y cli e n t fo r fu r t h e r i n s t r u c t i o n s Pla c e cli e n t co n v e r s a t i o n on CO O Sa m p l e s ma y be ad j u s t e d at c l i e n t re q u e s t La b Se t ID Pr o c e d u r e February 16 2009 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 Steve Landau Denison Mines 1050 17th Street 950 Denver CO 80265 TEL 303 389-4132 FAX 303 389-4125 RE Qrt Ground Water Dear Steve Landau Lab Set ID L88835 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Kyle Gross Laboratory Director Jose Rocha QA Officer American West Analytical Labs received samples on 2/6/2009 for the analyses presented in the following report All analyses were performed in accordance to National Environmental Laboratory Accreditation Program NIELAP protocols unless noted otherwise If you have any questions or concerns regarding this report please feel free to call The abbreviation Surr found in organic reports indicates surrogate compound that is intentionally added by the laboratory to determine sample injection extraction andlor purging efficiency Thank you Approved by Laboratory Director or designee Report Date 2/16/2009 Page of All analyses applicable to the CWA 5DWA and RCRA are perfooned in accordance to NELAC protocols Pertinent saotplin infonnation is located on the anacited COC 1mm report is provided for the exelosive sise of the addressee Privileges of sobseqnent ose of the nanse of tIns contpany or any ineotber of its staff or reprodnetion of thin report in connection snith the advertisement protection or sale of any prodact or process or in connection ssith the re-poblication of this rcpnrt far any purpose other than for the addressee snill be granted only on contact This cootpany accepts ito responsibility except for the doe perfoneanre of inspection and/or analysis in good faith and according to the rsiles of the trade and of science Digitally aigned by J000 Rocha Jose ON cnJoao oArnerican Weal Analytical Laboratorlea ouQAO ernallloae@awal corn cUS Date 2009.02.16 141409 0700 Am e r i c a n We s t An a l y t i c a l La b s WO R K OR D E R Su m m a r y 06 - F e b - 0 9 Wo r k Or d e r L8 8 8 3 5 Cl i e n t ID DE N I O O QC Le v e l Pr o j e c t Qr t Gr o u n d W a t e r Lo c a t i 1 n j4 1 Co n t a c t St e v e La n d a u Co m m e n t s QC L e v e l Sa m p l e ID Cli e n t Sa m p l e ID Co l l e c t i o n Da t e Da t e Re c e i v e d Da t e Du e Ma t r i x Te s t Co d e Sto r a g e L8 8 8 3 5 - O 1 A MW - S 2/ 4 / 2 0 0 9 12 0 7 0 0 PM 2/ 6 / 2 0 0 9 2/ 2 0 / 2 0 0 9 Aq u e o u s 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 3 5 - 0 2 A MW - 1 2 2/ 4 / 2 0 0 9 15 2 0 0 P M 2/ 2 0 / 2 0 0 9 82 6 0 - W - C U S T O M VO O P r i d g e L8 8 8 3 5 - 0 3 A MW - 1 4 2/ 4 / 2 0 0 9 94 0 0 0 Aiv l 2/ 2 0 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 3 5 - 0 4 A MW - 2 8 2/ 4 / 2 0 0 9 41 2 0 0 PM 2/ 2 0 / 2 0 0 9 82 6 0 - W - C U S T O M Vo C F r i d g e L8 8 8 3 5 - 0 5 A MW - 2 4 2/ 5 / 2 0 0 9 81 0 0 0 AM 2/ 2 0 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 3 5 - 0 6 A MW - 6 0 2/ 5 / 2 0 0 9 71 5 0 0 AM 2/ 2 0 / 2 0 0 9 82 6 0 - W - C U S T O M VO C F r i d g e Pa g e lo f SheetDENISONaa MINES CHAIN OF CUSTODY Samples Shipped to American West Analytical Lab 463 West 3600 South Salt Lake City Ut 84115 Contact Ryan Palmer or David Turk Ph 435 678 2221 rpalmercdenisonmines.com dli irkThdenisnnminesr.nm Chain of Custody/Sampling Analysis Request Project Samplers Name Samplers Signature Sample ID MW-S MW-12 MW-14 MW-2 MW-24 MW-GO Date Collected 2/4/200 2/4/2009 2/4/2009 2/4/2009 2/5/2009 2/5/2009 Time Collected 12007 1352 940 1612 810 715 Laboratory Analysis Requested TH HF HF HF HF HF THF THF THF Please nofify Ryan Palmer of Reciept tempature these samples Immediatelyl Thank you Relinquisheji BySignature Ks Date/time /Yr 2-s-oi Keceived BySignature Date/I ime Rejtnqu shed BySignature Date/Time Received BySignature 4JQAAu L4IC Date/Time 21a/09 ofl Ort Ground Water Tanner Holliday La b Se t ID Po u r sm a l l am o u n t of sa m p l e in th e sa m p l e lid Po u r sa n i p l e fr o m Lid ge n t l y ov e r wid e ra n g e pH pa p e r Do No t dip th e pH pa p e r in th e sa m p l e bo t t l e o r lid If sa m p l e is no t pr e s e r v e d pr o p e r l y lis t it s ex t e n s i o n an d re o e i v i n g pH in th e ap p r o p r i a t e co l u m n ab o v e Fla g CO C an d no t i f y cli e n t fo r tu r t h e r i n s t r u o t i o n s Pla o e oli e n t oo n v e r s a t i o n on CC C Sa m p l e s m a y be ad j u s t e d at c l i e n t re q u e s t No t e s Pr o p e r l y Pr e s e r v e d Sa m p l e s We r e CO C Ta p e Wa s Co n t a i n e r Ty p e No Re c Z if i - S h i p p e d By Af Pr e s e n t on Ou t e r Pa c k a g e NK e s No N/ A AW A L Su p p l i e d Pl a s t i c AW A L Su p p l i e d Cl e a r Gl a s s I- l a n d De l i v e r e d Am b i e n t Un b r o k e n on Ou t e r pa c k a g e Nk e s No O N / A AW A L Su p p l i e d Am b e r Gl a s s Oi i l l e d AW A L Su p p l i e d VO A / T O C / T 0 X Y An T h e r Cl e a r He a d s p a c p 1 4 o He a d s p a c e Te m p e r a t u r e Pr e s e n t on Sa m p l e Ye s Gl 1 o ON / A Re c Br o l c e n / L e a k i n g Ye s -N o N/ A No n AW A L Su p p l i e d a i u e r No t e s ID - t e s ON o ON / A tJ a b r o l c e n on Sa m p l e OY e s ON o No t e s Re c Wi t h i n 1- b i d O4 e s No No t e s Dis c r e p a n c i e s Be t w e e n La b e l s an d CO C Ye s L1 . N d No t e s Bo t t l e Ty p e Am m o n i a Pr e s e r v a t i v e pH 11 2 5 0 4 Al l pH s 01 K .- CO D pH 2 H 2 S O 4 .. Cy a n i d e Me t a l s N0 2 N 0 3 PH l 2 N a O H pH 2 H N 0 3 pH 2 H 2 5 0 4 Nu t r i e n t s pH H2 5 0 4 OG pH C H C L Ph e n o l s pH H2 S 0 4 Su l f i d e pH 9N a O H Th A C .- __ _ _ TK N pH 11 2 5 0 4 TO C pH 2 H 3 P 0 4 .. . - ._ _ _ 1P 0 4 pH 21 1 2 5 0 4 -. - - - TP H pH HC L - Pr o c e d u r e l February 16 2009 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City UT 84115 Steve Landau Denison Mines 1050 17th Street 950 Denver CO 80265 TEL 303 389-4132 FAX 303 389-4125 RE 1st Qrt Ground Water Dear Steve Landau Lab Set ID L88886 801 263-8686 Toll Free 888 263-8686 Fax 801263-8687 email awal@awal-labs.com Kyle Gross American West Analytical Labs received samples on 2/11/2009 for the analyses presented in the following report All analyses were performed in accordance to National Environmental Laboratory Accreditation Program NELAP protocols unless noted otherwise If you have any questions or concerns regarding this report please feel free to call The abbreviation Surr found in organic reports indicates surrogate compound that is intentionally added by the laboratory to determine sample injection extraction and/or purging efficiency Laboratory Director Jose Rocha QA Officer Thank you Approved by Laboratory Director or designee Report Date 2/16/2009 Page of All analyses applicable to the CWA SOWA and RCRA are pcrfonncd in accordance to NELAC protocols Pertinent soospling iofonttatton is located on the aoached CCC This report is provided for the etclosive ose of the addntssee Privilenes of stihscqticnt tise of the natite of this cottipany or any ocosbor of its staff or rcprodnetioit of thts report in connection seitli the advertisottient proittotton or sale of any proditet or process or in connection snith tiso re-poblication of this report for any psirpooe other than for tire addressee seill be granted only on contact This conrpany accepts no responsibility escept for the dne perfoosianee of inspection ond/or analysis in good fatth aitd according to the ntles of the trade and of seieisce Digitally atgned by Joae Rocha Jose DN crJoae oAmarican Weal Analytical Laboratortea ouQAO cli corn cus Date 2009.02.16 114600 0700 Am e r i c a n We s t An a l y t i c a l La b s WO R K OR D E R Su m m a r y 11 - F e b - 0 9 Wo r k Or d e r L8 8 8 8 6 Cl i e n t ID DE N 1 0 0 QC Le v e l Pr o j e c t 1s t Qr t Gr o u n d Wa t e r Lo c a t i o n Co n t a c t St e v e La u d a u Co m m e n t s QC L e v e l Sa m p l e ID Cli e n t Sa m p l e ID Co l l e c t i o n Da t e Da t e R e c e i v e d Da t e Du e Ma t r i x Te s t Co d e Sto r a g e L8 8 8 8 6 - O 1 A MW - 3 2/ 9 / 2 0 0 9 11 3 2 0 0 AM 2/ 1 1 / 2 0 0 9 2/ 2 5 / 2 0 0 9 Aq u e o u s 82 6 0 - W - C U S T O M VO C F r i d g e L8 8 8 8 6 - 0 2 A MW - 3 A 2/ 9 / 2 0 0 9 10 4 0 0 0 AM 2/ 2 5 / 2 0 0 9 82 6 0 - W - C U S T O M Vo C E r i d g e Pa g e lo f l DENISONAA MINES CHAIN OF CUSTODY Sheeti of Samples Shipped to American West Analytical Lab Contact Ryan Palmer or David Turk 463 West 3600 South Ph 435 678 2221 Salt Lake City Ut 84115 rpalmercThdenisonmines.com _____________________________dturkdenisonmines.com Chain of Custody/Sampling Analysis Request Project Samplers Name Samplers Signature Ground Water Tanner Holliday Sample ID Date Collected Time Collected Laboratory Analysis Requested MW-3 2/9/2009 1132 THF MW-3A 2/9/2009 1040 THF Please nofify Ryan Palmer of Reciept tempature on these samples Immediatelyl Thank you Po u r sm a l l am o u n t of sa m p l e in th e sa m p l e lid Po u r sa m p l e fr o m Lid ge n t l y ov e r wid e ra n g e ph pa p e r Do No t dip th e ph pa p e r in th e sa m p l e bo t t l e o r lid If sa m p l e is no t pr e s e r v e d p r o p e r l y lis t it s ex t e n s i o n an d re c e i v i n g pH in th e ap p r o p r i a t e co l u m n ab o v e Fla g CO C an d no t i f y c l i e n t fo r fu r t h e r i n s t r u c t i o n s Pla c e cli e n t co n v e r s a t i o n on CC C Sa m p l e s m a y be ad j u s t e d at cli e n t re q u e s t La b Se t ID Sa m p l e s We r e CO C Ta p e Wa s Co n t a i n e r Ty p e No Re c Sl i l p p e d By fT 1 Pr e s e n t on Ou t e r Pa c k a g e 4W A L Su p p l i e d Pl a s t i c Ha n d De l i v e r e d Am b i e n t Ye s No N/ A Un b r o k e n on Ou t e r pa c k a g e A/ 4 L Su p p l i e d Cl e a r Gl a s s AW A $ p p l i e d Am b e r Gl a s s gt l i i l l e d Te n p e r a t u r e r3 - c S XY e s No N/ A Pr e s e n t on Sa m p l e Ye s No N/ A Un b r o k e n on St h n p l e AW A L Si i j 3 p . 5 d VO A / T O C / T O X Vi a l s Am b e r Cle a l X R H e a d s p a o e No He a d s p a c e Re c Br o k e n / L e a k i n g Ye s No ON / A No t e s No n AW A L Su p p l i o n t a i n e r No t e s OY e s _ _ O N o _ _ N / A Pr o p e r l y Pr e s e r v e d es No N/ A No t e s No t e s Re c Wi t h i n H o l d %e s No No t e s Dis c r e p a n c i e s Be t w e e n La b e l s an d CO \ Ye s No No t e s tt l e y p e Pr e s e r v a t i v e Al l pH s OK Ar n n a o n i a . - pH H2 5 0 4 CO D jH - c 2 S O 4 Cy a n i d e PH l 2 k O I Me t a l s pH 2H N O 3 NO 2 N0 3 -. Nu t r i e n t s OG pH 11 2 5 0 4 pH 2 H C L Ph e n o l s pH H2 S 0 4 Su l f i d e pH 9N a O H Zn A C TK N TO C PH 2 1 1 2 5 4 pH H3 P 0 4 sc P0 4 pH 11 2 5 0 4 c% TP H pH 2 H C L __ _ _ _ Pr o c e u r e lj UPS Internet Shipping Shipment Label Page of UPS Internet Shipping View/Print Label Print the labels Select the Print button on the print dialog box that appears Note If your browser does not support this function select Print from the File menu to print the label Fold the printed label at the dotted line Place the label in UPS Shipping Pouch If you do not have pouch affix the folded label using clear plastic shipping tape over the entire label GETTING YOUR SHIPMENT TO UPS Customers without Daily Pickup Schedule same day or future day Pickup to have UPS driver pickup all of your Internet Shipping packages Hand the package to any UPS driver in your area Take your package to any location of The UPS Store UPS Drop Box UPS Customer Center UPS Alliances Office Depot or Staples or Authorized Shipping Outlet near you Items sent via UPS Return Services5M including via Ground are also accepted at Drop Boxes To find the location nearest you please visit the Find Locations Quick link at ups.com Customers with Daily Pickup Your driver will pickup your shipments as usual FOLD HERE 2/10/2009 L1 rf 1- k- ID HO ci ci LI O LI Od1E-04P-.1\cII Mi .-I0oca 00 03 -I https//www.ups.com1uis/createActionQrnPaiiprintUISReceiptPOPUP_LEVEL.. Quarterly Depth Summary 1st Quarter 2009 WELL DATE DEPTH WELL DATE DEPTH MW-I 2/11/2009 66.56 MW-4 3/3/2009 80.08 MW-2 2/17/2009 109.5 TW4-1 3/10/2009 61.68 MW-3 2/9/2009 83.18 TW4-2 3/10/2009 68.99 MW-3A 2/9/2009 85.21 1W4-3 3/3/2009 48.59 MW-4 2/17/2009 72.21 TW4-4 3/3/2009 63.76 MW-S 2/4/2009 106.84 1W4-5 3/3/2009 55.9 MW-li 2/16/2009 90.68 TW4-6 3/10/2009 72.36 MW-i 2/4/2009 108.72 TW4-7 3/10/2009 68.26 MW-14 2/4/2009 104.17 TW4-8 3/3/2009 68.49 MW-i 2/9/2009 106.3 TW4-9 3/3/2009 54 MW-i7 2/9/2009 77.05 TW4-iO 3/10/2009 56.23 MW-18 2/i 1/2009 71.64 TW4-ii 3/10/2009 59.82 MW-i9 2/11/2009 50.86 1W4-i2 3/3/2009 38.06 MW-20 2/2/2009 80.68 TW4-i 3/3/2009 49.51 MW-22 2/2/2009 67.62 TVV4-i4 3/3/2009 89.57 MW-23 2/11/2009 113.88 1W4-i5 3/3/2009 81 snag MW-24 2/5/2009 114.9 1W4-i 3/3/2009 65.62 MW-25 2/3/2009 76.77 TW4-i 3/3/2009 76.95 MW-26 2/2/2009 76.85 1W4-i 3/3/2009 56.81 MW-27 2/16/2009 51.73 1W4-i 3/3/2009 94.49 MW-28 2/4/2009 78.18 TW4-20 3/3/2009 76.53 MW-29 2/3/2009 103.15 1W4-2i 3/10/2009 61.35 MW-30 2/3/2009 79.08 1W4-22 3/10/2009 55.81 MW-3i 2/3/2009 70.37 1W4-23 3/3/2009 67.51 MW-32 2/2/2009 77.72 TW4-24 3/3/2009 56.46 TW4-25 3/3/2009 48.44 PIEZ-i 2/i 7/2009 62.94 PIEZ-2 2/17/2009 16.39 PIEZ-3 2/17/2009 35.2 PIEZ-4 2/17/2009 51.34 PIEZ-5 2/i 7/2009 45.75 BOUNDARY \\ \\ II Sq50 MW-20 /1 32 UW43 S6472 3000 MW-22 1/ S5450 MW-20 5460 5556 PZ-l 5593 MW-Si 4-5546 5573 5540 SCALE IN FEET EXPLANATION perched moMonng well showing elevabon Si feel amsi temporary perched monitoring well showing elevation in feel amsl perched piezometer showing eievatioa in Met amsl perched monitoring well installed Apdl 2005 showing elevation in eel amsi temporary perched mOSOS-Ig well installed April 2005 showing elevation in eel wi temporary perched monitoring weit installed May 2007 showing woxunate elevation // // 7/ // // // NOTES Locations and elevations for TW4-23 TW4-24 and TW4-25 are approximate // // // HYDRO GEO CHEM INC KRIGED 1St QUARTER 2009 WATER LEVELS WHITE MESA SITE APPROvED DATE REFERENCE FIGURE 171 8000ImayO9IwIO3Og srtsJs Steve Landau From Steve Landau Sent Friday May 29 2009 358 PM To Dane Finerfrock Subject Comma Seperated Values 1st Qtr 2009 GWDP Report Attachments C09030659 GW.csv C09020267 GW.csv C09020538 GW.csv C09020434 GW.csv C0901 0761 GW.csv C09020234 GW.csv Dear Mr Finerfrock Attached to this email is an electronic copy of quarterly and quarterly accellerated laboratory results for groundwater monitoring conducted under the Groundwater Discharge Permit for the White Mesa Mill during theist Quarter 2009 in Comma Separated Value CSV format Monthly CSV data for the January and March samplings are attached as well. Yours truly Steven Landau