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Home My WebLink AboutDRC-2008-002282 - 0901a0688080cdd9DENIS()NMINES f. August 28,2008 Mr. Dane Finerfrock, Executive Secretary, Utah Radiation Control Board, Utah Department of Environmental Quality, Division of Radiation Control 168 North 1950 West Salt Lake City, Utah 84114-4850 Dear Mr. Finerfrock: Re: State of Utah Radioactive Material License No. UTI900479 White Mesa Mill, Blanding, Utah Semi-Annual Effluent Monitoring Report for Period January 1, 2008 through June 30, 2008 As required by Utah Administrative Code, P.313-24-4 (incorporating by reference 10 CFR 40.65 (subpartl)), and License Condition 11.3 A of Utah Radioactive Materials License UT1900479, enclosed is the semi-annual effluent monitoring report for the White Mesa Mill for the period January 1, 2008 through June 30, 2008. If you have any questions regarding this report, please contact Mr. David Turk or myself at telephone number (435) 678-2221. YouJs very truly,,-4/*-/'- DrNrsox Mnns (USA) Conr. Steven D. Landau Manager, Environmental Affairs Cc Ron Hochstein Harold Roberts (w/o attachments) David Frydenlund David Turk Tom Rice, Ute Mountain Ute Tribe Robert Duraski, EPA Region 8 1050 17th Street, Suite 950 Drnvrr, CO, USA t0205 Tel : 303 628-7798 Fer : 303 3tHt26Dcnieon tinrs (USA) Corp. Iwvu.donironmlnor.com I I T White Mesa Uranium Mill Radioactive Materials License UT90047 9 Semi-Annual Effluent Report (January through June, 2008) August 28,2008 Prepared By Denison Mines (USA) Corp. 1050 17th St. Suite 950 Denver, CO. 80265 I I I I I T I 3) 4) s) 6) 7) I I I t I I I I I I I T I I I I I Introduction The White Mesa Mill ("the Mill') has established monitoring progrcms to evaluate compliance with effluent limitations and to assess the potential for release of radioactive material into the local environment. These monitoring programs were developed and implemented at the time of mill construction, operated with appropriate adaptation over time, and remain consistent with the Mill's Radioactive Materials License and guidelines developed by the Nuclear Regulatory Commission (U.S.N.R.C. Regulatory Guide 4.14, Radiological EfJluent and Environmental Monitoring at Uranium Mills-Rev. 1, ML003739941), 1980). Accordingly, the Mill monitors the following environmental media and conditions: l) Airbome particulate radionuclide concentrations obtained from the following sampling stations:o North, East and South of the Mill Site: BHV-I & BHV-2 (north), BHV-5 (east), and BHV-4 (south) e BHV-I serving as a surrogate for the nearest resident, (i.e BHV-I is approximately 1.2 miles north of the Mill, but approximately 0.4 miles closer to the Mill than the actual nearest resident) o A background location distant to and west of the Mill (BHV-3), which was monitored for airborne particulate up until November, 1995, at which time background was established.o d station specifically requested by the White Mesa Ute Community south of the Mill Site (BVH-6) 2) External (direct) gamma radiation measured at air monitoring stations BHV-I, BHV-2, BHV-3, BHV-4, and BHV-5. 3) Radon-222 is measured at air monitoring stations BHV-1, BHY-2, BHV-4, BHV-5 and BHV-6 Vegetative uptake of radionuclides at three site periphery locations Stack release rates from the facility's air emissions sources Surface water within the Cottonwood Creek and, when flowing, the Westwater Creek drainage, both located west of the Mill Soil radionuclide activity obtained near the air monitoring stations Ground water (up and down gradient) of the Mill facilityl This semi-annual effluent report provides the results of the specific monitoring and sampling activities that were undertaken during the subject reporting period, including: e Airborne particulate concentrations and radionuclide activityo External radiation measurementso Radon-222o Vegetative radionuclide uptakeo Radionuclide release rates measured at the yellowcake stack and baghouseo Surface water radionuclide content I Ground water sampling is reported separately pursuant to the State of Utah Ground Water Discharge I I Permit No. UGW370004 and is not included with this report. ll I I I I I t I I T t I I I t t t I I I Table of Contents Section Introduction...... Table of Contents...... 1.0 Environmental Air Sampling 1.1 Program Overview. 1.2 Sampling Protocol & Analytical Results. 1.3 General Observations... 1.4 Specific Sampling Station Data.. 1.5 Radon-222... 2.0 External Radiation (Direct Gamma).. 3.0 Vegetation Samples...... 4.0 Stack Sampling.. 5.0 Surface Water Monitoring 6.0 Soil Sampling. 7.0 Meteorological Monitoring Pase i ii 1 1 2 J 5 7 8 8 9 9 9 Attachments Attachment A Tab I Tabz Tab 3 Tab 4 Tab 5 Tab 6 Attachment B Attachment C Attachment D Attachment E Attachment F Attachment G Attachment H Attachment I Sampling Station & Site Map BHV-I Air Sampling Graphs &DataTable BHV-2 Air Sampling Graphs &DataTable BHV-3 Air Sampling Graphs &DataTable BHV-4 Air Sampling Graphs &DataTable BHV-5 Air Sampling Graphs &DataTable BHV-6 Air Sampling Graphs &DataTable Air Radionuclide Lab. Results and QA/QC Air Particulate Loading Tables Radon-222 Analytical Sheets Environmental TLD Graph and data Vegetation Graphs, Data Table,Lab. Results and QA/QC Stack Sample Laboratory Results Surface Data Table, Lab. Results and QA/QC Soil Samplelab. Results and QA/QC I t I t I t t I I I I t T I I I I I I 1.0 E4yironmental Air Samnline 1.1 Program Overview The environmental airborne particulate monitoring program at the White Mesa Mill ("the Mill") currently utilizes five air sampling stations. Four high-volume continuous air sampling stations (BHV-I, BHV-2, BHV-4, and BHV-5) are required by the Mill's Radioactive Materials License. These sampling stations serve as sentinels for airborne particulate which could potentially emanate from the Mill site. In addition to its general site monitoring function, location BHV-I also serves as a conservative surrogate for concentrations at the nearest resident, because it is located approximately 1.2 miles north of the Mill just south of the nearest resident but between the Mill and that resident. With regard to background monitoring, the Mill previously operated a continuous high-volume air sampling station (BHV-3) which was located approximately 3.5 miles west of the Milling operation. With the approval of the U.S. Nuclear Regulatory Commission and effective Novernber, 1995, this station (BHV-3) was removed from the active air monitoring program. At that time, IUSA proposed (and the NRC determined) that a sufficient air monitoring data base had been compiled at station BHV-3 to establish a representative airbome radionuclide background for the Milling facility. It should be noted, however, that while air sampling was discontinued at this location, gamma measurements and soil sampling continue to be collected at BHV-3. In addition to the environmental air sampling locations described above, a sixth station (BHV-6) was installed at the request of the White Mesa Ute Community. This station began operation in July of 1999 and provides airborne particulate information in the southerly direction between the Mill and the White Mesa Ute Community 1.2 Sampling Protocol and Analytical Results Airbome particulate monitors are operated continuously at each of the high-volume air sampling stations referenced above. Particulate sample collection filters are gathered by site technicians weekly in accordance with the Mill's environmental ur sampling procedures and are composited on a quarterly basis for laboratory analyses. The analytical parameters applied to the collected filters are: Uranium-Natural activity, Thorium-230 activity, Radium-226 activity, and Lead-210 activity. In addition to the requisite nuclide determinations, particulate loading is determined for each filter and composited as a quarterly mass-loading estimate for review purposes only. Fugitive dust standards for the facility are limited by the Mill's State of Utah air quality permit, which sets a 20%o visual opacity standard. The specific locations of the Mill's airborne particulate monitoring stations are depicted on the attached figure, High Volume Air Monitoring Stations (Attachment A). The analytical results of radionuclide particulate sampling for each monitoring station operated during this January through lune, 2007 reporting period are provided under separate sampling station attachment tabs beneath Attachment A to this report (Tabs 1-6). Each Tab contains graphical illustrations of the nuclide concentrations in log-scale presentation format. The graphs display reported data over time since the 1981 inception of the Mill's environmental air monitoring program. t I I I I I I I I I I I I I I I I I I The actual analytical results (and associated QA/QC information) reported by the laboratory are provided under Attachment B. It should be noted that for graphical illustration purposes, values reported at zero, values reported at less than the prescribed detection limit (< 1 x 10-16 uCi/ml) and missing values were plotted as 1 x 10-16 uCiiml concentrations. Where other "less than" values were indicated (e.g. data where detection limits varied from I x 10-16 uCi/ml) the detection limit concentration was utilized for plotting the data point. The reader should also note that this graphing convention is not utilized to formulate station average information, nor is it intended as a precedent for data treatment. Instead, the intent here is to provide a conservative viewable depiction of site airborne nuclide information. The conservative nature of this format is founded in the fact that the actual concentration below the detection limit can not be determined and, as such, the plotted point is at a higher concentration than the actual activity concentration of the collected sample. In accordance with the above, the following environmental air sample station attachments are provided with this report for the period: o BHV-I, Nearest Resident "Surrogate" Monitor o BHV-2, North Monitoro BHV-3, Background o BHV-4, South Monitor o BHV-5, West Monitor o BHV-6, White Mesa Ute Community Monitoro Radionuclide Datao ParticulateLoadingData 1.3 General Observations Tab I Tab 2 Tab 3 Tab 4 Tab 5 Tab 6 Attachment B Attachment C The results of environmental air monitoring for this semi-annual period indicate that for all nuclides at all monitoring stations airborne radionuclide particulate activity concentrations were well below regulatory Effluent Concentration Limits (ECL's) and the Companies ALARA goals. It is noteworthy and expected that Pb-210 concentrations are elevated when compared to the other parent nuclide concentrations (i.e. U-nat, Th- 230 and Ra-226). This phenomenon is due to the well-established controlling effect experienced world-wide as a result of the ubiquitous presence of radon in the earth's atmosphere. Accordingly, elevated Lead-210 presence in disequilibrium with parent nuclides measured here is not associated with uranium milling operations. Radon-222 emanates as a decay-chain progeny of the Radium-226 contained in the soil of the earths crust and is dispersed generally throughout the earth's atmosphere. The electrically charged short and longJived decay products of Radon-222 attach to ambient dust particles found naturally in the atmosphere and are carried with the air. Lead-210 is the longest lived of these decay products and is the decay product of the shorterlived radon progeny. As such, it accumulates as an electrical attachment on the natural ambient dust in the atmosphere and is generally measured at elevated activity when compared to local decay-chain parent nuclide activity, regardless of uranium milling t t I I I I I I I I T T I I I I t I t activity. At the Mill's BHV air monitoring stations, all dust (ambient natural and mill derived) is collected by the sample filter. Because of the natural elevation of Pb-210 accumulated as an attachment to the naturally occurring ambient dust particles collected by the air sampling equipment, Lead-210 is commonly elevated and in disequibrium when compared to parent nuclide activity, regardless of the Mill's presence. By way of illustration, average ground-level concentrations have been reported for selected States (NCRP Report 94, 1992) and are summarized in Table 1 below, demonstrating elevated Lead-210 activity where no uranium milling operations are located nearby. Lead-210 activity concentrations can be expected to be even higher for locations in the western U.S. where uranium ore bodies are commonly located. Table 1- NCRP Report 94-Global Lead-210 Concentration Example 1.4 Site Specific Sampling Data The results of airborne particulate monitoring for the period (without background subtraction) are provided by sampling station and nuclide in Tables 2-5 below. Along with these data, the tables present comparative Effluent Concentration Limits (ECL's) and the ECL percentage measured at each of the monitoring stations sampled during the period. A review of these data supports the conclusion that airbome particulate is well controlled at the Mill. More specifically, in all cases the measured activity concentrations were well within the ECL, as well as the Mill's ALARA Goal (i.e. 25% of the ECL). In fact, the data obtained since program inception in 1981 indicates that only one individual quarterly measurement (TH-230 at BHV-5 for the 2nd qff, $96) has ever exceeded the ECL at the Mill. With regard to this particular single measurement, while it is important to consider and evaluate an individual measurement exceeding the ECL, for public dose estimation purposes it is the annualized data that are of primary significance. In this instance, the annualizedTh-230 data for BHV-5 in 1996 are well below the ECL for the annual period. In addition to these observations, evaluation of the data by comparison to the Mill's ALARA Goals reveals that, with very few exceptions, the gross (background inclusive) measurements also do not exceed the site's ALARA objectives which have been established at 25o/o of the ECL (i.e. only 9 of the 2,064 gross nuclide determinations exceeded the Mill's self-imposed ALARA threshold). It should also be noted that the analytical laboratory maintained Lower Limits of detection consistent with NRC Regulatory Guide 4.I4 for this reporting period. State Pb-210 Concentration uBq/iVI3 uCi/mI California 600 t.6E-14 Illinois 1500 4.tB-l4 Ohio 300 8.1E-1s Massachusetts 700 t.9E-t4 I t I I I I I I I I I I I I I I I t I Table 2- Air Monitoring Station Results U-Nat (Comparison to Limits) Table 3- Air Monitoring Station Results Th-230 (Comparison to Limits) Table 4- Air Monitoring Station Results Ra-226 (Comparison to Limits) Table 5- Air Monitoring Station Results Pb-210 (Comparison to Limits) Monitoring Station l't Qtr.Result (uCiiml) 2"" Qtr.Result (uCi/ml) Effluent Concentration Limit (ECL) (uCi/ml) Average Percent ECL BI{V.1 1.14 E-16 7.09 E-r6 9E-t4 0.46 BHV-2 <1.0 E-16 t.29 E-t6 9E.14 0.13 BHV-4 1.2s E-16 1.28 E-I6 9E-t4 0.78 BHV-5 3.16 E-16 3.13 E-15 9 E-t4 t.92 BI{V-6 4.34E-16 1.88 E-l6 9 E-t4 t.29 Monitoring Station l"' Qtr.Result (uCi/ml) 2'- Qtr.Result (uCi/ml) EfIlueut Concentration Limit (ECL) (uCi/ml) Average Percent ECt BHV-1 1.13 E-l6 3.83 E-l6 2E-t4 0.83 BHV-2 <1.0 E-l6 <1.0 E-l6 2E-t4 0.33 BHV-4 <1.0 E-l6 7.72F-16 2E-t4 t.45 BHV-5 6.17 E-16 9.27 E-t6 2E-14 3.60 BHV-6 3.51 E-l6 9.00 E-I6 2E-14 2.09 Monitoring Station l't Qtr.Result (uCiiml) 2"" Qtr.Result (uCilml) Effluent Concentration Limit (ECL) (uCilml) Average Percent ECL BHV-1 <1.0 E-l6 2.27 E-16 9 E-13 0.02 BHV-2 <1.0 E-l6 <1.0 E-l6 9 E-13 0.01 BHV-4 <1.0 E-l6 3.61 E-16 9 E-13 0.03 BHV-5 3.70 E-16 9.27 E-t6 9 E-13 0.26 BHV-6 <1.0 E-l6 4.04E-r6 9 E-13 0.03 Monitoring Station [" Qtr.Result (uCi/ml) 2"" Qtr.Result (uCi/ml) Effluent Concentration Limit (ECL) (uCilml) Average Percent ECL BHV-1 6.44B-ts 6.52E-5 6 E-13 1.08 BHV.2 6.49 E-15 4.82F-5 6 E-13 0.94 BHV-4 4.09 E-l5 1.18 E-4 6 E-13 1.33 BHV-5 4.82B-ts 7.40 E-5 6 E-13 r.02 BHV-6 5.99 E-1s 7.41E-5 6 E-13 t.12 I I I t I t t I I I I t I t T t I I I 1.5 Radon-222 Due to the unavailability of monitoring equipment to detect the new 10 CRF Part 20 standard, and with the approval of NRC, Radon 222 morntoring at BHV stations was discontinued in 1995. Instead, Denison demonstrated compliance with these limits and the requirements of R313-15-301 by calculation, authoized by the NRC and as contemplated by R3l3-15-302 (2) (a). This calculation was performed by use of the MILDOS code for estimating environmental radiation doses for uranium recovery operations (Strenge and Bender 1981) and more recently in 2003 by use of the updated MILDOS AREA code (Argonne 1998). The analysis under both the MILDOS and MILDOS AREA codes assumed the Mill to be processing high grade Arizona Strip ores at full capacity, and calculated the concentrations of radioactive dust and radon at individual receptor locations around the Mill. The MILDOS and MILDOS AREA codes calculated the combined Total Effective Dose Equivalent (TEDE) from both air particulate and radon at a number of locations including the nearest potential residence (the individual likely to receive the highest dose from the licensed operation), approximately 1.2 miles north of the Mill. These calculations revealed projected doses to the individual likely to receive the highest dose from the licensed operations to be below the ALARA goal of 10 mrem/yr for air particulate as set out in R313-15-l0l(4). Radon had also been calculated to be within regulatory limits. While confident that past modeling was sufficiently accurate, it was Denison's belief that detection equipment had improved since 1995. Accordingly, Denison initiated active Radon-222 sampling at its air monitoring stations during the first quarter of 2007 as an augmentation to the calculated results obtained previously by use of the MILDOS computer code. As cited above, Denison was granted approval by NRC in 1995 to utilize such calculations to determine compliance with these limits, in lieu of radon sampling, as contemplated by R3l3-15-302(2)(a). A copy of the Technical Evaluation Report evidencing such approval was enclosed with correspondence to the Division on July 28, 2008. Accordingly, while active sampling was initiated during 2007, its purpose was as an evaluative tool to track Radon-222 trends for ALARA purposes and not as a replacement for the calculated values which demonstrated compliance with the resulting concentration limits. While reviewing the 2nd Quarter 2007 data it was observed by Denison that the concentration indicated at Location BHV-2 was elevated and nearly twice the next highest readings. Because the BHV-2 location is distant (nearly 3 miles) from Milling activities and, since BHV-I, which is closer to the Mill and in the same wind path as BHV-2, measured only 0.4 pCilL, Denison surmised that the alpha track reading at BHV- 2 was errant. As the year (2007) proceeded this belief was supported by the observed radon data. More specifically, the prior reading (1't Quarter,2007) was 0. I pCilL and the subsequent readings for 3'd anp 4m Quarters were 0.3 and 0.1 pCi/L, respectively, as compared to the questioned 2no Quarter concentration of 0.7 pCilL. Given the logistics * ** I I I I I I t I I I T T I T I T I I T and measurements at BHY-2 and BHV-I, and the fact that milling activities were reasonably constant (ore was being received and alternate feed was being processed throughout the year), milling activities were ruled out as a cause for the anomalous reading. However, data for the l't Quarter, 2008 has again indicated an anomalous concentration of 0.7 pCilL at BHV-2. In contrast, subsequent (2no Quarter,2008) data were at less than the stated detection limit of 0.4 pCilL. Denison has noted that the 0.4 pCilL reading (4E-10 uCi/ml) does not comport with the NRC Regulatory Guide 4.14 specified lower limit of detection of 2E-10 uCi/ml. Accordingly, wo have requested that the analytical laboratory recount the 2nd Quarter, 2008 alpha track detectors at a higher density to achieve the required LLD. The results of these re-analyses are pending at the time of this writing but will be transmitted to the Division once they become available. As such, Denison is hesitant to draw any conclusion about the data obtained thus far by alpha track detection due to the inconsistent nature of the observed data. However, these previously calculated MILDOS AREA results confirm the facility's compliance with the Radon-222limits. This demonstrated compliance is confirmed by the fact that the annual average radon measurements to date at BHV-2 are below the equilibrium adjusted evaluation criteria (including the errant high value for first quarter) set out in Table 6 below. As a result, the facility is compliant with its annual limit, despite the demonstrated inconsistency in measured concentrations. Table 6- Location Specific EfIluent Concentration Limits forRn-222 These values include subtraction of the background concentrations measured at BHV-3. Atl radon-222 values, including background, reported for the 2nd Quarter, 2008 indicated concentrations below 0.4 pCilL. I' When comparing alpha track data to effluent concentration limits for radon, two referenced limits are listed in the regulations. One limit (1 x l0-10 uCi/ml or 0. I pCi/l) is for instances where radon daughters are present with the radon, and are in 100% equilibrium with the parent Rn-222. The other listed concentration limit (l x l0-8 uCi/ml or l0 pCi/l) is applicable when radon daughters are not present. At the White Mesa Mill, 100% equilibrium of radon progeny with parent Rn-222 is unrealistic given the short half lives of the nuclides considered and the short travel time to the monitoring locations. Radon emanates from the ground (or mill tailings) without daughters present, and the daughters grow in over time. It is therefore necessary to evaluate radon daughter equilibrium at each air monitoring station utilizing site-specific wind speed and distance infonnation to derive site-specific Effluent Concentration Limits (ECL's). Such disequilibrium situations and alternative calculations are anticipated by the regulations and, in particular, R3l3-15-302(3) provides a means by which the licensee rnay adjust the effluent concentration values in Appendix B to 10CRF, Part 20 at table 2 (which are incorporated by reference into R3 I 3- I 5-302(2)(bxi) to account for disequilibrium. The regulatory purpose ofsuch an adjustrnent is to appropriately take into account the actual characteristics ofthe measured effluents, including radioactive decay equilibriurn. Air Station Wind Speed (m/s) Distance (m) Travel Time (minutes) Equilibrium Factor Calculated ECL (nCi/L)r 1"'Qtr 2007 (oCi/L)* 2no Qtr 2007 fnCi/L)* BHV-5 +--,900 3.49 0.07 1.43 0.8 ** BHV-6 4.2 1600 6.35 0.t2 0.83 0.6 ** BHV-I 4.3 2000 7.7s 0.14 0.7r 0.7 >** BHV-4 2.8 2000 I 1.90 0.20 0.50 0.5 )8* BHV-2 4.3 4900 18.99 0.29 0.34 0.7 {(* I I I I I I I I I t I I I I I I t I I Toward this end, Denison utilized an established (EPA, 1986) outdoor equilibrium formula to determine the appropriate Equilibrium Factor for use in calculating the ECL for disequilibrium conditions. The EPA expression ofthe outdoor Equilibrium Factor (EF) is derived by the following equation: EF =1.0 - 0.0479 expG'r+'zt\ -2.1963 exp(-'l38'6) + l.2442exp(-t t28'4') [Where, t is the travel time in rninutes (distancdwind speed)] Once the Equilibriurn Factor has been determined, the ECL for each air rnonitoring station is determined by dividing the 0.1 pCi/l limit (for situations when daughters are present in equilibrium) by the Equilibrium Factor (EF). By utilizing this formula, Denison has determined the appropriate (equilibrium adjusted) evaluation threshold for each of its air monitoring stations. This information, the data inputs used to determine the Equilibrium Factor, and the results of sampling for this report period are shown in Table 6. It should be noted when observing the cornparison between the actual measurement value and the derived ECL that the derived ECL provides ample protection for members of the public. More specifically, by utilizing current ICRP dose conversion factors the ECL's established here represent approximately 25 mrem for a continuous exposure at the monitoring stations. Therefore these values serve as an ALARA goal and would yield doses well below the 100 mrem standard for individual members of the public. 2.0 External Radiation (Direct Gamma) Gamma exposure rate estimates were measured for the first and second quarters of 2008 utilizing passive integrating devices, thermoluminescent dosimeters (TLD's). These dosimeters were co-located at each of the license-required high-volume air sampling stations and at the designated background monitoring station (BHV-3). Measurements obtained from location BHV-3 have been designated as background due to BHV-3's remoteness from the Mill site and attendant lack of potential for exposure from the Mill operation (i.e. BHV-3 is located approximately 3.5 miles west of the Mill site). The results of the environmental TLD measurements and serni-annual cumulative above- background data are provided in Table 7 below. In addition, measurement data obtained at these locations are graphically presented at Attachment D to this report. Table 7- Environmental TLD Measurements (Gamma) Monitoring Station 1"' Qtr Result (mrem) 2"u Qtr Result (mrem) 1" Qtr Result Less Background (mrem) 2"" Qtr. Result Less Background (mrem) Cumulative Semi- Annual Estimate* (mrem) BHV-1 37.44 33.02 2.73 t.t7 3.9 BHV-2 34.71 32.76 0 0.91 0.91 BIIV-3 34.71 31.85 NA NA NA BHV-4 34.45 32.50 -0.26 0.6s 0.65 BHV-5 34.t9 32.76 -0.52 0.91 0.91 BHV-6 31.20 28.2t -3.51 -3.64 0.00 x Negative values treated as zero for cumulative dose The results for this period indicate that above background measurements for stations BVH-I, BVH-2, BVH-4, BVH-5 and BHV-6 are well within regulatory limits with a I I I I I I I t I I t I I I I I I I I maximum exposure of 3.9 lnrem for the period at BHV-I. The exposure rates indicated are approximate to the background values measured at BHV-3, except the first quarter value at BHV-I which is anomalous and possibly received some in-transit exposure. This supposition is supported by the elevated values show for the control badge for the period. The annual individual member of the public (IMOP) limit is 100 mrem/yr at the property boundary for combined internal and external exposure. 3.0 Vesetation Samples Vegetation samples are collected at three locations around the mill periphery. The sampling locations are: 1) Northeast,2) Northwest and 3) Southwest of the Mill facility. The vegetation samples are collected during early spring, late spring and fall (e.g. the growing seasons). Graphical log-scale presentation of the vegetative radionuclide uptake observed for this reporting period and results reported by the analytical laboratory (including QA/QC information) are included at Attachment E of this report. The early and late spring 2008 data compared to the results of previous years indicate no increase in uptake of Ra-226 or Pb-210 in the vegetative growth collected and are within the variation of previous sampling episodes. Trending of these data is generally down when the entire period of record is considered. It should be noted that vegetation samples in recent years were collected during a period of severe drought in San Juan County. For this reason sampling was dramatically affected due to the scarcity of available vegetative species at the respective sampling locations. Regarding lower limits of detection, all analyses indicated detected concentrations. 4.0 Stack Sampline Processes involving effluent control equipment and associated stack emissions (i.e., the yellowcake dryer and baghouse) were operating in the I't Quarter of 2008 while uranium product from alternate feed processing was dried and packaged. However, during the 2nd quarter the mill was in a process transition to unrefined ore processing but yellowcake drying was not conducted during the quarter. Consequently, stack sampling was performed only in the l't Quarter of this semi-annual period. The analytical results of the yellowcake stack sampling are provided in Table 8 below, indicating the uCi/cc release for U-Nat, Th-230,Ra-226 and Pb-210 at the yellowcake dryer for that quarter. The actual analytical results reported by the laboratory are provided in Attachment F to this report. It is important to note that stack effluent concentrations are not comparable to environmental air sampling station ECL's for regulatory compliance purposes. The ECL is a limit that applies to the site boundary locations and is not applicable to effluents from mill processes on the Mill site. These stack release data are more appropriately utilized for dose modeling purposes and dose modeling is not computed for semi-annual reporting pu{poses. The matter of laboratory detection limits for stack sampling was addressed in recent correspondence to the division subsequent to these analyses. Consequently, future (post July, 2008), data will be compliant with Regulatory Guide 4.14 guidance with regard to LLD's for stack sample analyses. I I I t T I I I I I I T I I I I I I I Table 8- Stack Effluent Concentration and Release Rate 5.0 Surface Water Monitorins Surface water samples were collected from Cottonwood Wash during the l't and 2"d Quarters during this reporting period, however, Westwater Creek was not able to be sampled because it was dry for the quarterly sampling events. The analytical results are compiled in tabular format in Attachment G to this report. In addition, Attachment G includes the actual results reported by the laboratory, as well as the attendant QA/QC information accompanying the laboratory's report. Cottonwood Wash is an intermittent ephemeral drainage located southwest and down-gradient of the Mill complex. Radionuclide data (U-Nat, Th-230 andka-226) do not indicate trending over time nor are influences from the Mill operations evidenced by the reported data. 6.0 Soil Sampline Annual soil samples are collected by the Mill staff during the third quarter of each year and are, therefore, not reported for this period. 6.0 Meteorolosical Monitorine As in prior reporting periods, an independent contractor has prepared the White Mesa Mill Semi-annual Meteorological Monitoring Report for the period of January through June, 2008. This information is retained at the Mill site for agency review. Radionuclide Quarterly (1"' Quarter) Sampling Quarterly 1Z"d quarter)'sampling North Yellowcake Drver U-Nat u/Cilcc l.9E-9 None None U-Nat. uCi/sec t274 None None Ra-226 uCi/cc 5.48-13 None None Ra-226 uCi/sec 0.36 None None Th-230 uCi/cc 2.48-12 None None Th-230 uCi/sec 1.62 None None Pb-210 uCi/cc l.8E- l3 None None Pb-210 uCi,/sec -t.28-1 None None ETEETEET.EE E r$W. I I,#tr' idu i 'Mi#*w' ' ffit-$'$* i ntr ]k -dffi-ffi -i -'ruffi ','tu % \ q,, ry-*uQ$*- 4 ,ry#*nl,# T" #f,'t+fni*a I s- -:rqt&=+% -&-"Q\:ff aoh, o .e$ )t** -" \\ qfo;u ( | **P q-\ tuC:T** %* -\ -Ft**d%4-\- @**- -, fu.#x\(,*,) I .k 'i: i\ i k ''-.'.., \ : %'''*h*'*m I \i \ I II I I t c(\I 0t d(l _l;;E----,-- - - -as;$*.,lltu'"lqn I d3'-d' I EI#, ISvl#l i -$r- i : +tr -I --- -d&-l ds e,- | ,r..#''e-l \,"h# i'o* -sI h =:*h i ?* ,,.r*,1";:'riirmtiiJ rr I *r**','t'"*''u'"*dF,,..-,. :'. 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LUD -210 GRGS COUNTING LLO 1OCtuC 'nrr..ah&Hsr{6JUM2t$p0&k{Ns41 2{ul{12+$p{13tb{11-AS4 1-Jut{2GSp{2sk{231ilrr{3SJm{3p$p{3&h{3bMeto4 27{un{4 27-$p{4 2&Mar{5&un{5&p{5 $AF* 3.O3E-t5 1E,1€ 3.SES5.01E-15 1E{6 5.SE@7.8e-10 lE-tO &A E{r5.@El6 1Ei6 6.OOE{13.75E-16 1E{6 4j7E415.21E{6 1E-16 5.79E{l1.42E-16 1E{6 1.SE{1r.81E{6 1E-tO 2.01E{13.08E-16 lEiO 3.42E413.31E-10 1E{6 3_8E{14.77E-16 1Et6 5.31E{136E{8 1E{6 4.09E413.07E{6 1E-16 4.OAE{1<l.mEt6 1E-10 <1.11E{l1.SEr6 1E{6 zmE411.1EEi6 1E-1€ 1.32E41<l.@E-lO 1E{6 <1.11E{l<1.@E-10 tE{o <1.11E{1<r @E{8 1Er6 <1.11E{1<1.mE{€ 1E{6 <1.118{1<1.@Et6 lErO <1.11E{1r.05E{6 1E-16 1.16E{t<1.mE{6 1Et6 <1.1lE{l1.28E-16 1E{6 1.42E{11.SE{6 1E-16 2.19E{l7.87E-r6 tE{6 a.52E{12.S2E-16 1E{6 3.24E41 r.37E-15 6.SEn7 1E-10 4.siE{o2.&E{5 1.5E-10 1E{6 9.6Efr5.25E-10 5.qEn7 1E{6 ,.75Efr3.SE{6 3.62E{7 1E{O 1.1aE02.23E-16 4.23E-17 tE{6 7.qE413.$En6 5.04E-17 1Et6 1.t3E4O<1.mE{6 NA 1Ei6 <3.33E{11.ffE-16 3_S€{7 1E"16 5.52E{11.01Et6 1.01E-17 1E_16 3.37E{t1.25E{€ 2.72E-17 1E{E 4.15E{12.gE-16 4.10E17 1Ei6 9.82E{l4.41E-16 4.158-17 1E{6 1.47E05.SE-i0 4.4e-17 1E-16 1.87E@3.43E16 3.47E-17 1E-16 1.11E@1.6E{0 2.6E-17 1Et6 5.61E{11.15E-16 1.SEt7 lE-r6 3.63E{1<1.mEn0 MA 1E{6 <1.11E{21.SE-16 1.6En7 1E-tO 4.5E{1<1.00Ei0 N/A 1E{6 <3.33E{2<1.mE{0 N/A 1E{6 <333E{2r.s-16 1.91E-17 1E-r6 4.59E{11.72E-10 2.35E-17 1E-16 5.7E{1<1.mEt6 N/A 1E{8 <3.SE421.01E-16 2.@{7 1E-1€ 3.4E{15.SEr6 6.11E{7 1E{O ZOES2.&{O 4.@En7 1E{6 9.6E{12.&En0 2.67E{5 1E-16 6.7E{12 SE-r5 4.12E-14 5.2*-17 1En6 e.@EO'1.31E-15 6.53E-17 tEtG 1.G{t3.mEi6 1.@Er7 lErE 3.SE{26.11E16 5.gE{7 1E-16 0.78E42l.91Et6 2.8E 17 t€16 2.18$23.28€{7 2.@E-17 1E-18 3_UE42<1.@E{6 NA 1E{6 <1.11E{2<1.mEn6 N/ 1E-16 <1.11E{21.?7E-1A 38E-17 lEt€ 1.97E{21.09E{6 1.mE{7 tE-16 1.21E42 1 SE-r6 1_61E-17 1Et6 2.18e421.70E-16 1.8E17 tEt6 1.ffi{21.&Ej0 1_m17 1E-16 2_@E421.678-16 1.$E-17 1En€ 1.85E{2<1.mEj0 N/A 1E{6 <1.11E{2<1.@El6 N/A 1El6 <1.11E{2<1.@E-10 N/A 1E{6 <1j1842<r.00Et6 N/A rE-16 <t.1tE{2<1.00EJ6 VA 1E-16 <111E42<1.mE-10 MA 1E{€ <1.11E{2<r.@Er6 &A 1E-16 <1.11EA2<1.@E{6 N/A 1E{6 <1_11E42<1.mE-16 VA 1Ei0 <1.11Eq2<1 0oEl6 N/A 1E"16 <l.1tE{23.$E{6 5.97E{7 1Er6 3.SE{23.@En5 1.63Ei6 1€{€ 4_@Et1<1.@Er8 N/A 1E{6 <1-11E42l.0EE-16 1&Et7 lF-ta ,.$c-15 3,05E-16 lE{O t.8E{Lr0E-15 3.17E{6 1E-10 l.sEs7.SEr5 3.16E-16 tE-t6 I.IE{O4.AE.l5 293E-r6 1E-10 a.oG{l6.41E{5 4.61E-t6 tE{6 1.02Eff&57E{5 4.708 16 tE-16 1.€Ee6.r5El5 Z6E{6 1E{6 l.O3Etr6.95E{5 2.57E-16 1E.16 1.r6Efl8.SE{5 1.72E-1O 1Et6 1.€E@3.14En5 t.E5E{6 tE-16 5.24E416.61E{5 1.70E-16 1E{6 1.43E08.AE-15 1.&E{A lEr6 1.37E{555E-15 1.10E-t6 lE-16 9.frE{11.35E-14 1.M{€ 1Et6 2-24Efi7.nE-15 1.€E{6 lE{O l.AE{5.g2Et5 l.gE-10 1E-16 9.87€{rE.OE-15 1.95Et6 1En6 t.sE{o6.SE{5 1_72e-10 1Et6 1.11E@6.17E{5 2_XE-1A lEnO 1 SE&3.55E,15 2.21E-10 2E-15 5.92E{l1.2E-14 3.2E-16 2E 15 2.03E@1.52E{4 2.0€{6 2E-15 ZSEd9.AE-15 1.@E{6 2E_15 I SES9.SE{5 !.65E-10 2E-15 f.ilEfl1.71e-14 0.188 18 2Et5 2.AEfi4.E5Ei4 6.SEnO 2E-15 8.@E{1.11E{4 2.52E-16 2Et5 1.680 1 ,10E-14 a nF-la4.97E{1 17 2-4w472{d{7 3G$p073!k{7 31-MerSe31ors 5.SE-lO1.SE{ 5 3.AE-16 2.92E 154.gEt6 1 SEis 2.49E16 3.15E{6 2.18E-1A 1.02E-16 1.55En5 3.51E{6 9.00E16 5.04E-11 3.1 1E-1 7 5_74E-17 2.@E-17 1.SE-103.gE{7 1.43E-16 7.42E-17 6.SE-17 2.85E{7 1E-16 9.23Efi1En6 s.SE{i1E{6 l.AE@1E-16 4.SE{t1Ei6 3.24lE{6 4.83E{11E-16 2.09E{0 1E,16 E.31E{1 | <1.mE_i61E{6 1.O5E4O | <1.@E-161E{6 7.BE@ 1.gEi61E-1€ 3,@E{t <lE-161E{6 5.17E@ 3.16E"16tE{6 1.17EO <1En81E-16 3.mE{O 4.04E{6 1E-16 <1.11E{2 I1Et6 <1.t1E{2 |lE 10 1.re421E{6 <1.tlE{2 |1Et6 3.51E{2lE{6 <1.11E{2 I1E-16 4.€E{2 l.rcEi4 5.17E 16 2E-15 2.&Ee1.43E{4 2.14E{8 2E-15 2.SE@2.04E-14 7.42E-16 2Et5 X41E06.$E-rs 2.s5E-16 2e15 1.6Ee9l9Et5 2.77EtO 2E{5 1.53E{Os.wjs LgE-16 2En5 LSE{I7.41E-15 2.73E{6 2E-15 r_248fl I l-Pl lfl IH lTl lil l3l u , 7", - og, Ip' <o-? 96 ;$ t.: :\-O.fa, n?nYo :$ oo-? Q5-r16 -h * A -/1 jo, 'ot6. -.\ ?'o4 ;Z'o4 :$,1 .'u =E C)5 oco G coocooop Eftr .9t(Eu G'I o rN(Y)sq(oN@ :TTTirrrEHH,r,r{!,n;qqEEEEEE Fr;:=_ (elecg 6o1) ENEBGT LABOBAT0BTE_S, t!{c. ' 2393 sart creek Highway (8260/) . p.o. Box s2i8 . caspq w s2602rolt Free 888.z3i.o0rs . eozirs.ous ; rax ibi.i:ii. iffie ':Li1ili6ri66yt";ro, . www.enersytab.com I I I I T T I T I t I t t t T T T T I IIIGH VOLT]ME ATR SAMPLING REPORT CLIENT: DENISONMINES REPORTDATE; August18,200E PROJECT: 2nd euarter 201)g Environmcntrl Air Sampling SAMPLE ID: BIIV-r Quartcr/Date Sampled Ait Volumc Radionuclide Concentration pCi/ml, Error Estimatc uCi/mL L.L.D. pCi/mL Eflluent Conc.* rrCi/nf . % Efiluent Concentration c08040302-00t First Quarter 2008 Air Volume in ml.t 1.36E+l r nr,u l.l4E-16 N/A 1.00E-16 9.008-14 r.26E-0t23oTht. l3E-t6 2.63E.-t7 1.00E-16 3.00E-14 3.76E-0t22tRa< 1.00E.15 N/A 1.00E-t6 9.00E-I3 < t.ltE-022roPb6.448-15 3.818-16 2.00E-15 6.00E-13 1.07E+00 Quartcr/Datc Srmpled Ait Volume Rodionuclide Concentration pCi/mL Error Estimete uCi/mL L.L.D. pCi/mL EIIIuent Conc.r 7o EffIuent Conccntration c080701 l2-001 Second Quarter 2008 Air Volume in ml-r I.24E+l I n"rU 7.09E-16 N/A 1.008-r6 9.00E-r4 7.8EE-01,,hr 3.83E-16 1.03E-16 1.00E-15 3.00E-14 1.288+00226Ra2.27E-16 3.468-17 1.00E-16 9.008-t3 2.538-022'hb 6.528-15 4.788.t6 2.008-15 6.008-13 L09E+00 LLD's arc from Reguletory Guidc 4.14* E{Ilucnt Concentration provided by Deniron Mines I ENERGY LABoBAToBE_s!-tllc: --239J saft creek Highway (82601) . po. Box geSa . caspet; wyaz602ro// Free M8.235.0515 ' 3a7.i35.05ff :-Fax nbi:ii;:io1'i':'dJiiidrii6yffi*, . wwwenersylab.comI I I Client: Project: lab lD: Client Sample lD: LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp znd Quarter Environmental Air c080701 12-001 BHV 1 Report Date: 08/18/08 Collection Date: 04101/08 DateReceived : O7 l0Zl0B Itiatrir Filter I Analyses Result Units Quallfiers RL MCUQCL Mothod Analyrls Date / By t t t t I T T T T I I t I T TRACE METALS Uranium Uranium, Activity RADIONUCLIDES . TOTAL Lead 210 Lead 210 pEcision (t) Lead 210 MDC Radium 226 Radium 226 procision (r) Radium 226 MDC Thodum 230 Thorium 230 precision (r) 0,131 mgfflter88.7 pci/Fitter 812 pCilFilter 34.5 pCilFilter 39.6 pci/Fitter 29.8 pCUFitter 2.9 pCi/Fitter 1.1 pCi/Fitter 47.7 pCi/Fitter 8.0 pCUFilter 0.0003 0.2 0.2 E909,0M E909.0M E909.0M E903"0 E903.0 E903.0 E907.0 8907.0 SW6020 OTt2ttOe 06:16 / smtSW6020 07tZ7tOB 06:16 /smt 07nA08 11:00 / dm 07n2t0E11:00/dm 07f2A08 11 :00 / dm 07n3n$ 12:43 I lrs 07123108 12:43 I trs 07123108 12:43 I trs 07DA0820:1O I dmt 07DAl08 20:10 / dmf Report Dofinltlons: RL - Anatyte reporting limit. QCL - Qualily oontrol timit. MDC - Minimum detectable conccnt ation MCL - Maximum contaminant lgvel. ND - Not detec-ted at the reporting limit. ENERGT LABaBATaREA NC. ' 2393 Salt creek Highway (s2601) . po. Bo.v 32i8 . Casperi wy 02602rot Free 888.z3i.0sts . s0z.isi.ons-:-Fi ibi.'ii;.r6i's"7r;;;;;d*;;6ytr;.)com , www.enersytab.com I I T I I T I t I I I T I T T t I I T LLD's are from Regulatory Guide 4.14' Efrluent Concentration provided by Denison Mines Quarter/Date Sampted Ail Volume Radionuclide Concentration pCi/nnl" Error Estimate uCl/mL L.LD. FCYnL EfrIuent Conc.' uCl/ml. 7o Efrlueut Concentratiou c08040302-002 First Quarter 2008 AirVolumeinmL t.378+ll rutu < 1.008-16 N/A 1.00E-16 9.00E-14 < l.llE-012rTh1.008-t6 N/A 1.00E-16 3.00E-14 < 3.33E-0122"Ru 1.00E-16 N/A 1.00E-16 9.00E-13 < l.1lE422roPb6.49E-15 3.82E-16 2.00E-15 6.00E-13 I.08E+O0 Quarter/Date Srmpled Ait VoIume Radionuclide Concentration FCilmL Error Estimate nCilml. LLD. p(.Yu.L EfIIueat Cotrc.' nCi/ml. 7o Effluent Conceltration uu8070l t2-002 Second Quarter 2008 AirVolume inmL 1.34E+l I *tu t.29E-16 N/A 1.00E-16 9.00E-14 1,43E-01230'Ift < l.00E 16 N/A 1.00E-16 3.00E-14 < 3.33E_01226Ra1.00E-16 N/A 1.00E-16 9.00E-r3 < l.llE-022roPb4.82E-t5 4.5IE-16 2.00E-15 6.00E-13 8.03E-01 T _ENERQY L,ABORATOBIES, tNC. .239J Salt CreekriliF,iiiaizisliiiiT'ii,iss*irs-:;;ib;.fr;.,'!g!-:r,f,igi3;,i;3rpi,lfi!;,,ifil:,r[J!,f,f, I T I T Glient: Project: lab lD: Gllent Sample lD: LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 2nd Quarter Environmental Air co8070112402 BHV2 Report Date: 08/18/08 Collection Date: 04t01t08 DateReceived: 07l0Zl0B Matrlx Filter Analyses Result Units Qualifiers RL mcuQCL Uethod Analysis Date / By 0.2 T I t I T I t I T t I T I I TRACE METALS Uranium Uranium, Activity RADIONUGLIDES . TOTAL Lead 210 Lead210 p'ecision (r) Lead 210 MDC Radium 226 Radium 226 precision (*) Radium 226 MDC Thorium 230 Thorium 230 precision (t) 0.0262 mg/filter17.7 pCilFitter 648 pci/Fitter 32.6 pCilFitter 39-6 pCi/Filter 8.4 pCi/Filtcr1.6 pCi/Fitter1.1 pCi/Filter 11.6 pCi/Fitter 2.7 pCitFitter 0.0003 0.2 SW6O20 |t2tn| 06:24 / smtSW6020 l7ntng 06:24 / smt E909.0M E909.0M E909.0M E903.0 E903.0 E903.0 E907.0 E907.0 07nA0811:00/dm 078A08 t1:00 / dm 07nA08'11:00 / dm 07nAA8 12:43 / ks 07DA08 12i43 I tts 07n3N8'12:43 / trs 07l2El0E 20:10 t dmf O7nBnB 20:10 / dmf Report Definitions: RL - Analyb reporting limit. QCL - Quality @ntrol limit. MDC - Minimum deteciable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit. ENEBGY LAaoRAToRtEs, tNC. . zJgJ salt creek Hlqlway (sz60t) . p.o. Box 32iB . caspq wy a2602To// Free 888.235.0515 ' 307.2s5.0515 . Fi ili.iaq. roii :ciipiideii6yEli.co, . wwruenersytab.com I T I I I I I I I I t T T T I I I LLD's are from Regulatory Guide 4.14 ' Effluent Concentration provided by Denison Mines I I QuarterlDate Sampled An Volume Radionuclide Concenhation pCi'lmL Error Estimate uCi/mL L.LD. pCi/ml Effluent Conc* uCilm[. 7o Efrluent Concentration c08040302-003 First Quarter 2008 Air Volume in mL l.36Eru *,U 1.258-16 N/A 1.00E-16 9.00814 t.39E-01,,Th r.00E-16 N/A.1.00E-16 3.00E-14 < 3.33E-012roRa1.008-16 N/A 1.00E-16 9.00E-13 1.1 IE-022roPb4.098-15 3.04E-16 2.00E-15 6.00E-r3 6.81E-01 Quarter/Date Sampled Air Volume Rarlionuclide Concen(ration pCi/mL Error Estimate uCilmL LLD. pCi/mL EffIuenl Conc.r rrCi,/mf . 7o Elfluent Concentration c080701 l2-003 Second Quarter 2008 Air Volume in mL 1.24E+11 netu 1.28E-15 N/A 1.00E-r6 9"00E-14 1.42E+00230Th7.72E.-16 2.098-16 1.00E-16 3.00E-14 2.5T8+00z26Ra3.61E-16 4.30E-17 r.00E-16 9.00E-13 4.01E.022loPbl. l8E-14 5.738-16 2.00E-15 6.00E-13 1.97E+00 I ENEEQY LABoRATonEs, rNC. . 2093 salt creek Hlglway (sz60t) . po. Box 3258 . caspet; w a2602ro// Free 888.235.051s ' 307.235.0srs ; iax ebiiii.ilii':Hiii6riiiwhliro, ,wwwenersytab.com t t I Client: Project: Lab lD: Client Sample lD; LABORATORY ANALYNCAL REPORT Denison Mines (USA) Corp 2nd Quarter Environmental Air c080701 12-003 BHV4 Report DatE: 08/18/08 Collection Date: 04/01/08 DateRecelved: 07lO2lOB Matrix: Filter I Analyses Result Uniti Qualifierc RL iltcu QCL ilethod Analyeis Date / By T T TRACE METALS Uranium Uranium, Activity RADIONUCLIDES . TOTAL Lead 210 Lead 210 prccision (t) Lead 210 MDC Radium 226 Radium 226 precision (t) Radium 226 MDC Thorium 230 Thorium 230 precision (r) 0.235 mg/filter159 pCi/Fifter 1470 pci/Filter 41.3 pCi/Fitter 39.6 pGilFilter 46.3 pCi/Fitter 3.5 pcilFilter 1.1 pCi/Filter 95.6 pCi/Filter 15.7 pCi/Fitter 0.0003 0.2 0.2 E909.0M 8909.0M E909.0M E903.0 E903.0 8903.0 E907.0 E907.0 SW6020 07t27fi8 06:28 / smlSW5020 07l2ilOg 06:28 /smt 07D2108 11:00 / dm 07ni,08 11:00 / dm 07nA08 11:00 /dm 07t23108 12:43 I tn 07123/08 12:43 / hs 07123108 12:43 I ta 07P.Al08 20:10 / dmf 07128108 20:10 / dmf T t I I T I t I I t I Report D,eflnltlons: RL - Analyb repor0ng timit. QCL - Quality mntrol limit. MDC - Minimum detedable concentration MCL - Maximum @ntaminant level. ND - Not detected at the reporting limit. ENERGT LABORATORIE$, tNC. . psgs satt creek llqlway (a2601) . p.o. Box 32sB . caspe4, wy g2602 To// Free 888.235'05t5 ' 307.235.05/5 ' Fax ior.zsq. rc1i : bipeideieriytttii.'com . wwwenergytab.com I I I I t t t I T I I I I T t I I t T LLD's are from Regulatory Guide 4.14. Efiluent Concentration provided by Denison Mines Quarter/Date Sampled Air Volume Radionuclide Concentration pCilmL Error Estimate rci/mL LLD. pCi/mL Effluent Conc.' uCi/mt- o/o Ellluent Concentration c08040302-004 First Quarter 2008 Air Volume inml 1.36E+l I *tu 3.16E-16 N/A 1.00E-16 9.00E-14 3.51E-01 '*Th 6.t7E-16 4.268-t7 1.008-16 3.00E-14 2.06E+00226Ra3.708-t6 3.67E-t7 r.00E-16 9.00E-13 4.ttB-022loPb4.82E-t5 1.75E.-16 2.00E-15 6.00E-13 8.03E-01 Quarter/Date Sampled An Volume Radionuclide Concentration pCilml, Error Estimate uCi/mL LLD. pCi/mL Effluent Conc.' rr.CilmL Yo Ellluent Conceutration c080701 t2-004 Second Quarter 2008 Air Volume in mL 1.33E+11 -tu 3.13E-15 N/A 1.008-16 9.00E-14 3.488+00,,Th t.55E-15 2.30E-16 1.00E-r6 3.00E-14 5. l5E+00225Ra9.27E-t6 4.20E-17 1.00E,16 9.00E-13 l.03E4l2roPb7.408-15 2.738-t6 2.00E-15 6.00E-13 1.23E+00 T ENERoY LABonAToRtEs, tNC. , 2J93 salt creek Hlg-lway (sz60t) , po. Box 3zi8 , caspeti wy ae602To// Free 888.235.0515 ' s07.235.0515 ' Fax 302.2J4. toSi : ciipiideiidyEffcom . wwwenergylaocomI I T Client: Project: Lab lD: Client Sample lD; LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 2nd Quarter Environmental Air c080701 1 2-004 BHV 5 Report Date: 08/18/08 Collectlon Date: 04/01/08 DateReceived: 07fi2108 Itlatrix: Filter I Analyses Result Unlts Quallllere RL MCUQCL Method Analysis Date / By 0.2 T t t I T I T I T I T TRACE iiETAUi Uranium Uranium, Aclivity RADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (r) Lead 210 MDC Radium 226 Radium 226 precision (r) Radium 226 MDC Thorium 230 Thorium 230 precision (r) 0.618 mg/filter 418 pCi/Filter 986 pci/Filter 36.4 pCi/Filter 39.6 pCUFilter 125 pCi/Filter 5.6 pCYFilter 1.1 pci/Filter 206 pCi/Filter 30.6 pci/Filter 0.0003 o.2 SW6020 07n7nt 06:33 / smtSW6020 Oll27l08 06:33 I smt E909.0M E909.0M E909.0M E903.0 E903.0 E903.0 E907.0 E907.0 0712?/08 11:00 / dm 07n?J08 l1:00 /dm 0712U0811:00/dm 07123108 12:43 I lrs 0712310812:43 / trs 07123108 12:43 I trs 07f2U08 20:10 I dmt 07l28lAB 20:10 / dmf I T T Report Definitlons: RL - Analyte reporting limit. QCL - Quality control limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit f,trFffi{,ili'"8{?if,2i!,?,;'!'!;!ii:;flilg.:,"f,i?,8;,i;E pi"ifi!,;-?,firir,[d,'j,ff,t t T t I I I I I I I t t I T T I I T LLD'c arc from Rcgulatory Guidc 4.14* EIIIucnt Concentration provided by Dcnison Mines TtrGH VOLUME AIR SAMPLING REPORT CLIENT: DEMSONMINESREPORTDATE3 August18,2008 PROJECT: 2nd euerter 200g Environmcntal Air Sampting SAMPLE ID: BIIV6 QuafterlDate Sampled Ait Volume Radionuclide Concentrrtion pCi/nL Error Estimate rCi/mI. L.L.D. pCi/mL Efiluent Conc.* trC-ilml. % EflIucnr Concentrationc08040302-005 First Quarter 2008 Air Volume in ml,s I 16F+r r onu 4.34E-t6 N/A I ni}E 9.00E-14 4.83E-0t230.1.h 3.5tE-16 3.388-t?1.00E-16 3.00E-t4 l.l7E+00,ruRa < t.00E-15 N/A 1.00E-16 9.00E.13 < l.l lE-022roPb 5.99E-15 r.948-t6 2.008-15 6.00E-13 9.988-01 Quartcr/Date Sampled Air Volumc Radionuclide Conccntration pCVmL Error Estimate uCilmL LI,.D. pCVmL Eflluent Conc.* uCi/nL 7o Effluent Concentrationc08070t l2-00s Secord Quarter 2008 AirVolume in ml.s 1.33E+l I *u t.88E-15 1.008-16 9.00E-14 2.09E+00,rolh 9.00E-16 1.00E-16 3.00E-r4 3.00E+00'uRu 4.04E-t6 2.858-17 t.00E-16 9.00E-t3 4.49E-022roPb7.418-ls 2.73E-16 2.00E-rs 6,00E-13 1.24E+00 I ENEBGY LABaRATaRTE_S, tuc. .2J9J san creek Highway (8p60r) , po. BoxJZSS . casper, wyap6a2To// Free 88&p1,.0ot5 ' a0ziaS.osu-:-rivbi5ii. t639 . casper@energylai.com , wwruenersyrab.comI T t Client: Project: Lab lD: Client Sample LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 2nd Quarter Environmental Air c080701 1 2-005 lD: BHV6 Repod Date: 08/18/08 Collection Date: O4l01/08 DateReceived: A7D210B Matrlxr Filter I Anelyses Result Unlts Qualiflers RL TUTGUQcL Method Analysis Date / By 0.2 T I t I I T I ! I I I TRACE METALS Uranium Uranium, Activity MDIONUCLIDES . TOTAL Lead 210 Lead 2 10 plecision (t) Lead 210 MDC Radium 226 Radium 226 precision (*) Radium 225 MDC Thorium 230 Thorium 230 precision (r) 0.371 mg/fttter 251 pCilFilter 9E8 pCi/Fitter 36.4 pCilFilter 39.6 pCilFitter 55.4 pCi/Fifter 3-8 pCilFilter 1.1 pCilFilter 120 pCi/Filter 19.1 p0i/Fitter 0.0003 0.2 SW6020 l7ntn| 06:37 / smtSW6020 97ntn| 06:37 / smt E909.0M E909.0M E909.0M E903.0 E903.0 E903.0 E907.0 E907.0 0712210811:00/dm 07D2l0E 1't:00 / dm 07nU0811:00 /dm 07n3n$ 12:43 ltrs O7P'gnB P:43 I tre 07n3n$ 12:43 I trs 07/2A08 20:10 I dmt 07128108 20:10 I dmt T t I Report Definitions: RL - Analyte reporting timit. QCL - Quallty control timit. MDC - Minimum detectable @ncentration MCL - Maximum contiaminant level. ND - Not detected at the reporting lirnit. frfFfl!{'il!'"Ef{%112i{f;,;ry;!igr;!#fl?:#!,ifiL;,i;E tri"Iff?;f,1:r:i;ffIlff, I I I I I I I T I I I T T T I Sa m ptes ; I 36,000p00 LI-e.r. of Samples; I30,000,000 Liters. LLD's are from Regulatory Guide 4.I4* Eflluent Conccntration provided by Denison Mines t t I t EIGII VOLUME AIRSAMPLING REPORT CLIENT: DENISON MINESREPORTDATE: Augustlg,200E PROJECT: 2nd eueiler 2(X)g Environmcntal dir Sampllng SAMPLEID: BLANK Quarter/Datc Sampled Air Volume Radionuclide Concentration pCi/mL Error Estimate uCi/mL L.L.D. pCi/mL EffIucnt Conc.* uCi/mL 7o Ellluent Concentration c08040302-006 First Quarter 2008 Air Volumo in ml.s "",U < 1.00E-6 N/A 1.00E.t6 1,00E-t6 1.00E-16 o nnE-r < t.l tE-012lofll< I.00E.6 N/A 3.00E-14 < 3.33E-0t226Ra< 1.00E 6 N/A 9.00E-13 < l.llE-02t.J6L,+l I I - Air Volume for Blank assumed io bc ''?b nominel of Sn < 2.00E-15 N/A 2.00E-15 6.008-13 < 3.33E-01 Quarter/Date Sampled Air Volume Radionuclide Concentration pCilmL Error Ectim{te uCi/mL L.L,D. pCi/mL EIIluent Conc.i ttCilmL 7o Efltuent (aoh..naroti^- c080701 l2-006 Second Quarter 2008 Air Volume in mls 1.30E+l t *u < 1.00E-16 N/A 1.008-16 9.00E-14 < l.l lE-01soTh< 1.00E-15 N/A I 00F-t6 3.00E-14 < 3.33E_0t '*Ro < 1.008.16 N/A 1.00E-t6 9.00E-13 < l.llE-022roPb< 2.00E-15 N/A 2.00E- l5 6.00E-r3 < 3.33E-01orume ror utenk assumed to be nominal I ENER,Y LABoPAToRtE:,:!!v9:.'-2393 satt creek rtlgQwav (a26ot) - p.o. Box 3258 . caspeti waz602rolt Free 88{t.235.0s6 ' eoz.iss.asrs-;-ri sbiiii.i*Ss':i;;i;;dr,;;6rff;*, . twrw.enersylab.com I I I Client: Project: Lab lD: Cllent Sample lD: LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 2nd Quarter Environmental Air c080701 12-006 Blank Report Date: 08/18/08 Collection Date: 06/30/09 DateReceived : 07 l02t0} Matrix: Filter Arelyses Result Unlte Qualifiers RL ilcu QCL Method 0.2 T I T t I I T t I I I I Analysla Date / By TRACE METALS Uranium Uranium, Ac{ivity RADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (t) Lead 210 MDC Radium 226 Radium 226 precision (r) Radlum 226 MDC Thorium 230 Thorium 230 precision (t) 0.0019 mg/filter1.3 poi/Filter -16.0 pCilFilter 23.4 pCt/Filter 39.6 pCi/Fitter 1.1 pCilFitter 0.8 pOi/Filter 1.2 pGi/Filter 0.2 pclFilter 0.5 pCilFilter 0.0003 0.2 S1 ,5020 07l27t\g 06:53 / smtSW6020 07t27tOA 06:83 / smt E909.0M E909.0M E909.0M E903.0 E903.0 E903.0 E907.0 E907.0 07r2A0811:00/dm 072AOA 11:00 t dm 07f2!08 1l:00 / dm 47n3fi812:43 / trs OT2'AOA 12:43 / trs a723l08 12;43 / ks O7nU0820:10 ldmt O7n8,ng 20:101dmf t I I RL -Analyte reporting limil. QCL - Quality control timit. MDC - Minimum detectablo conc€ntration MCL - Maximum ontaminent level. ND - Not deteded at the reporting limit. U - Not detected at minimum detec*able concentration I ENERcv LABOBAT0RIES, NC . 2J99 safi creek Hjg-fway @e6ot) . po. Box 02fi . caspe4 wy a260eTottFree888.235.05t5 ' sz7.ist.osrs ; Fax sbi.iii.ioii :dipiiaieiiiwi{icon.wwwenersytab.com I I I I ANALYTICAL SUMMARY REPORT August 18,2008 Denison Mines (USA) Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.; C080701 12 Project Name: 2nd Quarter Environmental Air t Energy Laboratories, lnc. received the following 6 samples from Denison Mines (USA) Corp on 7ru2pgfor analysis. Sample lD Client Sarnple lD Collect Date Receive Date Matrix Test t I c08070112-001 BHV I O4l 01 I Og 00:00 07/02/08 Composite of two or more samples Metals, Total Digestion, Total Metals Lead 210 Radium 226 Thorium, lsotopic c08070112-002 BHV2 04/01/08 00:00 07/02/08 Filter Same As Above c48070112-O03 BHV4 O4lOllOB 00:00 0710?08 Filter Same As AboveIc08070112-004 BHVS 04/01/08 00:00 07/02/08 Filter Same As Above c08070112-005 BHV6 O4tO1 IOB 00:00 07/02108 Filter Same As Above T C08070112-006 Blank 06i30/08 00:00 07/0?08 Filter Same As Above As aFproPriate' any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the I OA/QC Summary Report, orthe Case Narrative. I lf you have any questions regarding these tests results, please call. t T I I I T T t ReportApproveaavlfu fu SIEUEC[&Sruil t ENEEoY LABoBATaBTE,, rryc , 2J9s satt creek Highway (8260r) . po. Box s25B , caspet wy a2602ro// Free 888.235.0515 ' sozisi.osrs-.-rr* ib1.iii. i65i :bi"iiiciriu6yfrli*, , wvnuenersylab.comI I I QAIQC Summary Report Client: Project: Denison Mines (USA) Corp 2nd Quarter Environmental Air Report Date: 08/18108 Work Order; C08070112 Analyte Method: E903.0 Sample lD: C08070377-00SAMS Radium 226 Sample lDl C08070377{0SAMSD Radium 226 Sample lD: LCS-I912,1 Radium 226 Samplo lD: M8.19124 Radium 226 Result Units Sample Matrix Spike 74.6 pCi/Fitter Sample Matrix Spike Duplicate 70.5 pCilFitter Laboratory Control Sample 14 pCilL Method Blank 0.2 pCi/L Run: TENNELEC-3_08071 ZA94 70 130 RL %REC Low Limit High Ltmit RPD RPDLlmtt Quat 90 83 t t T I Run: TENNELEC-3_08071 7A70 130 5.7 Run: TENNELEC-3_09071 7A 70 130 Run: TENNELEC-3_OBO71 7A Batch: 19124 07123108 14:56 07/23/08 14:56 22 07l23lOB 14:56 07123108 14:56 U 106 94 85 I I I Method: Sample lD: Thorium 230 Sample lD: Thorium 230 Sampla lD: Thorium 230 Sample lD: Thorium 230 E907.0 c08070r12{06AMS c08070112.006AMS2 LCS-I9124 ilB-l9124 Sample Matrix Spike 177 pCi/Fitter Sample Matrix Spike 87.3 pCi/Fitter Laboratory Control Sample 41.5 pci/Fitter Method Blank -0.1 pci/Fitter Ru n : EGG-ORTEC _OBOT 22A70 130 Run: EGG-ORTEC_080722A 70 130 Run; EGG-ORTEC-OBO722A 70 130 Run: EGG-ORTEC_090722A Batchl 19124 OtlzElOE 20:10 A7EOI08 09:52 07/29108 09:58 O7l29lOB 19:59 U 0.20 0.20 o.20 I t I I T llethod: E909.0trt Sample lD: C08070.t12-003AMS Lead 210 Sample lD: C08070i12.O03AMSD Lead 210 Sample lD: MB-R105681 Lead 210 Sample lD: LCS-R!0S681 Lead 210 Sample Matrix Spike 2870 pCi/Fitter Sample Matrix Spike Duplicate 2290 pCilFitter Methocl Blank 2 pCitL Laboratory Control Sampl€ 12O pCi/L Batch: 19124 Run: PACI(ARD 310OTR_080222A 0?\2ZAB 11:oO119 70 130 Run: PAC!(ARD 3100TR_080722A O7t22tOB 11:OO Run:PACKARD3lOOTR_O8O722A O7EAOA11:OO U Run:PACKARO31OOTR_080722A OT:ZZ(OBllt}O97 70 130 LeJV., ":fl|"rff,HT;: i:[f?."jjhffirtrnce ranso for this analvsis. sincs the Lcs and the Rpo for rhe MS MSo par are acceptabre, rhe response is @nsidered to be 70 130 23 30s matfix relaled. The batsh is approved I I I Qualifiers: RL - Analyte roporting limit. S - Spike recovery outside of advisory limits. ND - Not detected at the reporting limit. U - Not detectod at minimum detectable concenhation _ENEBGYLABORATOREA lNC. . ZJSJ SaltCreekf,jiFiiiiai?is.liiE y'ibz bs.au-: F; ib;;;;. #g!.:t !!ff!3;f;3rE*r: ;tr:xaff :;y, QA/QC Summary Report Client: Project: Denison Mines (USA) Corp 2nd Quarter Environmental Air Report Date: 08i18/08 Work Order: C08070112 3.7 93 112 '108 t I I I t I I T I I I I I T I Analyte Result Unlts Method Blank 3E-05 mg/L 1E-0S Laboratory Control Sample0.M68 mg/L O.OOO30 Sample Matrix Spike 0.0159 mgA O.O0O3O Sample Matrix Spike Duplicate 0.0153 mg/L O.0OO3O RL o6REC Low Llmit Htgh Limit RPO RPOLimit euat Method:sw6020 Sample lD: IUB-19124 Uranium Sample lD: LCSi-19124 Uranium Sample lD: C08070384-{!OiEMS Uranium Sample lD: C080703S4-{rOrEitSD Uranium Run: ICPMS2€_080715A Run: ICPMS2€_0B0Z1iA 75 125 Run: ICPMS2-C-O8O7iSA 75 125 Run: !CPMS2e0SOT1SA 75 125 Balch:19124 07116108 08:22 07/16/08 06:26 07116108 08:17 07/16/08 08:51 20 T I I I Qualifiers: RL - Analyte reporting limit.NO - Not detected at the reporting limit a 6trI.o oraE c,5uE X FElr ;i.cgE C)O= o -iE Etr€ s?gH gIE E'E€ |.EfrLo (IVJpuno,surnlHSnU Jorlo r(assBolE xuonqe8efr sgpgyrltoS.repM.4y E O gA SMv:ed,{lapueg ksJeulepog Jo JequnN = $ II 3o o o-Lb ==Lt-ob50-o iJoll.!,o.= got Loo.otr o ECL!,€o9> "89d'3bJ :E YE nsP <GE JEu NEe<rLEr.EctE &E nE-g o'6q< holF J =o"E2t 5 EEo EEf;E5u=o JEttI3 ,lilol Ei.ElI 6IEI! E IIE- E. IiEE. tEs t trEigl€B o $HEE +IEE =Bl3;: ]EE E iEE € IiEE ilei E ilsgf IEE E lir g I#g B liil IE ;EloJ! Oli* atE 3OL EE Es E E E Ec -+ o-t oo,(U(L oiEEL.oo-e EPtr3+rIOEOPJEErh dg (E: E# -bE(Efic8<fr E€(EE >El PEIvclgLlarffil =e IoE Itroloi IeE I.=c I EHIoH I HH t t T I I t I I I T I I T t I I I t I I I t I t I I I I I T t t T I T I I I Energy Laboratories lnc Workorder Receipt Checklist Denison Mines (usA) corp lffilil(ry{il{il{lffif,flflilfl1ffi c08070112Login completed by: Kimberly Humiston Reviewed by: '."'--"' I rvrrrreturl Date and rime Received: ztzlzlag 10:30 AM Reviewed Date: Received bY: ah Carrier name: Ground Shipping container/cooler in good condition? yes [t No n Not present ICustodysealsintac{onshippingcontainer/cooter? yes [t No E Notpresent ECustody seals intact on sampte boftles? chainofcustodypresent? Yv'r's* Yes ! No E NotPresent ,,yesfl NoEChain of custody signed when relinquished and received? yes [t No DChainofcuslodyagreeswithsampletabets? yes [t No ESamples in proper container/boftte? sample containers intact? Yes [l No f] YesM NoDSuffcientsamplevolumeforindicatedtast? yes [[ No nAll samples received within holding time? yes fl No ncontainerrremp Brank temperature in comptiance? yes m No n N/A'Cwater-VOAviarshavezeroheadspace? yes I No D NovoAviarssubmitted gwater - pH acceptable upon receipt? yes I No E Not Applicable g :;ffi:**:*:ffi:;t::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: None I ENERcy LABORATOETES:IIV^C: '-2393 Salt Creek fllqQway (82601) . p.o. 80x 3258 , Caspet; wy 82602ro// Free 888.235.0515 ' s0z.i35.oio-:ii ibiSii. roii :fiifri6rii6iiri|*, . www.enersylab.com T Date: 1&Aug-08I t CLIENT; Project: Denison Mines (USA) Corp 2nd Quarter Environmental Air Sample Delivery Group: C09070112 CASE NARRATIVE t I I I t T I I I I t t I I T THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT oRtc I NAL SAMPLE SUBMTTTAL(S) All original sample submittals have been relurned with the data package. SAMPLE TEMPEMTURE COMPLTANCE: 4"G (t2"C)Temperature of samples received *ay nJt ue *i rio"i"o properly preserved.by accepted standards. samples that areH:ij!Xf'* immediatelv ater colteaionitrrio" ;;";,['JJ;Gp"tlirl irtnl,.oi" ;;id-";;J#iine cnirrins process GROSS ALPHA ANALYSIS il,"ll[T3,1"'.'?ifln'#91?"1xj,3;::i3;1; L"J?E[l?1x1i:Hi:[r"r"r method ror row rDS waters Data provided RADON IN AIR ANALYSIS The desired exposure ti1e.is. 't8 hours (2 days). The time. delay in retuming the canister to the laboratory for processingshould be as short as possible to avoioLxceti'lve oecay. rr,laxirirum iecommenoeo deray between encr of exposure tobeginning ofcounting should not exceed S Oays. SOIUSOLID SAMPLES All samples reported on an as received basis unress otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS USING EPA 505Data for Atrazine and simazine 35 lipgrtlo r.i, epn sesz, not from EpA 505. Data reported by ELt using EpA method111i:tfifilil,,:X,::'ffi:?ll555gn*fJ: '' /ffiih; #lii,-rJ,i,r.u,"nl," r,iii'rntil,l","or, tr,J...pre -- SUBCONTRACTING ANALYSIS subcontracting of sample analyses to an outside lllgraprl.qray be.required. lf so, ENERGY LABSMTSRIES will utilize i::rti:i[U"^t"Til?J"it*TrXX1"o"o contractiauoiaiories rortnis's"ri""l e"v such raboratori"" *irr o" indicaled wirhin the BRANCH LABORATORY LOCATIONS eli-b - Energy Laboratories, lnc. - Biilings, MTeli-g - Energy Laboratories, tnc. - Gifletii, ieryeli-h - Energy Laboratories, tnc. _ Hefeni, lvtfeli-r - Energy Laboratories, lnc. - Rapid CiV, SOeli-t - Energy Laboratories, tnc. - Cotiege dilti*, fX CERTFICATIONS: USEPA: t4ff00002; FL-DOHXELAC: E87641; Arizona: 420699; Catifomia: 021,t8CAore gon: Vyy200oo 1 ; Urah : 307235os r e Vi.d,i;,'-oOosz; W"ir,iir gto;, 6i6os ISO 17025 DISCLAIMER: The results of this Analyticar Report rerate onry to the items submitted for anarysis. ENERGY LABoRAToRIES, lNc' - CASPER,II / ce(ifies that certain method selections contained in this report meetrequirements as set forth by the above """t"iiiinJ"uthorities. som" i"rrttl-r"quested by the client may not be coveredunder these certifieations. All analvsis oata io 6e-suurin"d i;. i"g;Li;'y ;"r*r;a"ri;i; 6i-."#n"o in the samprestate of origin' Please verifu ru's i;ertincaiion coverage by visiting wu ,,/.'energyrab.com 5:LTiJ::frf,:Jffiiffi:J# to provide vou with this analvtical service. For additionat informarion and services visit our ENEfrGY LABoRAToRtEq tNc , psgi sat creek ltlqlway (azoot) . p.o. Box szis . caspet; wysz602,folt Free 888,2s5.0s/5 . 30( - ,.osrs-.-rai sai,iii.iti:ei-:tiriZi6rii;siir";t , wwwenersylab.com I I I t I I I t I HIGI{ VOLUME AIR SAMPLING REPORT CI,IENT; DENISONMINES REPORT DATB: Ivlay 29,2008 PROJECT: lst euarter 200g Environmental Air Sampling SANTPLE ID: BHV-I Quarter/Datc Sampled Air Volumc Radionuclidc Concentmtion pCi/mL Error Dstimatc uCilml. L.L,D. pCi/mL Elfluent Conc,*%o Efflucnt Concentration c08040302-001 First Quarter 2008 Air Volume in ml.r 1,368+1r n.lu 1. t4E-16 N/A 1.008,r6 9.00D-r4 1.26E-0 r,rnfl.,Ll3E-16 2.638-17 r.008-!6 3.008-14 3.758-01,ruRa < 1.008-16 N/A L00E- 1 6 9.00E- 13 < Ll tE-022r0Pb6.44E-r5 3.8tE-16 2.00E- r 5 6.00E- r3 t,078+00 LLD's nre from Rcgulatory Guide 4.14* Efflucnt Concentration provirted by Dcnison Mines I I t I T I I t I I I t ENEfrGY LABaRATaBIES, tNC. . 2393 sart creek Hlqfway (se60r) . po. Box o-zi7 , casp4 hw az60z.rotlFree888.235.0515 . s07t' 1.051i . iai rlr.iii.roii :biiiii6riiisyhb.(---:**;;;;;Aiirb.;;;' t I Client: Project; Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 1st Quarter Enviromental Air c08040302-001 BHV 1 Report Date: 05/29/08 Collection Date: 01/01/08 DateReceived : 04107 tIB Matrix: Filter I Arulyses Result Unlts Quallflers RL MCU QCL Method Analysis Date / By o.2 1.0 0.2 T I t I I I T I I I I I TRACE METALS Uranium, Activity RADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (t) Thorium 230 Thorium 230 precision (*) Radium 226 Radium 226 precision (t) Radium 226 MDC 15.9 pGi/Filter 879 pCi/Filter2?.5 pCi/Fitter 15,4 pCi/Filter 2.5 pci/Fitter 2.6 pCi/Fifter 1.7 pCi/Filter 2.4 pCi/Filter sw6020 E909.0M E909.0M ES07.0 E907.0 8S03.0 E903,0 E903.0 04128108 02:17 / ts 04117t0810:30 /dm 04117108 10:30 / dm 04|l7lo\ '15:3S / dmf O4n7n815:3S / drnf 04124n815:29 I trs 04124fi815:29 / trs 0412410815:29 I trs Report RL -Anatyte reporting limit. QCL - Quality controt limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting timit.I I Definitionsl ENERGY LAEORATOR1ES, tNC . Z39S Salt Creek Hiqlway (SZ60U , pO. Box SZSB . Caspe4 Wys26A2,rotl Free d88.235,05t5 . a1i ' 'o*i: rui i:oiiii.iiiii'vr#,Viid"ii6yn:i| wwwenersylab.com I I I I t T I T T I I I I t I t I T I LLD's are from Regulaiory Guide 4.14* Efflueut Concenfration providerl by Denison Mines Qunltcry'Datc Samplcd Air Volumc Radioluclide Conccntration pCitml, Error Esfimate u.CilmL L.L.D. p.Ci/ml, Elfluent Conc.* uCi/mL 7o Effluent Conccntration c08040302-002 First Quarter2008 AirVolumeinml 1.378+11 *tu < 1.00E-16 N/A 1.00E-16 9.00E-14 < Ll tE-01230.Ih < 1.00E-16 N/A r.00E-r6 3.00E-t4 < 3.338_01226Ra 1.00E-16 N/A 1.00E-16 9.00E-13 < t.ltE-022loPb6.49W15 3.82E-r 6 2.00E-15 6,00E-13 1.08E+00 I I ENERGY LABaRAT0R1ES, tNc. . zsgs salt creek H1g-lway (sz60t) , p.o. Box 3?i8 , casper; wyae60a.Tot/Free888.zri.0sti . s1i ' i.05t5 : ni s0i.iad.iil's :Liriii6"iirTyh"it .wwruenersytab,com t T Client; Project: Lab tD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 1st Quarter Enviromenial Air c08040302-002 BHV2 Report Date: 05/29/08 Collection Date: 01101/08 DateREceived: 04/A7fi8 Matrix: Filter I Analyses Result Unit8 Quallfiers RL MCL/QCL Method Analysis Date / By 1.0 I I I I t I t I I I I I TRACE METALS Uranium, Activity RADIONUCLIDES - TOTAL Lead 210 Lead 210 precislon (t) Thorium 230 Thorium 230 precision (1) Radium 226 Radium 226 precision (r) Radium 226 MDC 8.0 pCilFilter 886 pCuFilter 27.6 pCUFitter 5.3 pOi/Filter 1.5 pCi/Filter 1.4 pci/Filter'1.8 p0i/Filter 2.8 pci/Filter sw6020 E909.0M 8909.0M E907.0 E907.0 E903.0 E90s.0 E903.O O4l28lO8O2i21 lts 0411710810:30 / dm 0411710810:30 I dm 0411710815:35 / dmf O4t'1710815:38 / dmf 04124108 15:29 / trs 04124n815:29 / trs 0412410815:29 I trs I I RL - Analyte reporting limit. QCL- Quality control limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit. U - Not detected at minimum detectable concentration T I I ENEfrGy LABaRAT0E1ES, Nc. . 2398 salt creek Hrghway (Bt60t) ,p.o. Baxs"zsa , casper; wys160protl Free &Bg.P3s.aiti , r0z; ' 0515 . ra* soi.iii. i6fi :biiiZi6riiigyfr:;0. . wwwenersylab.com I T I I I I I I I I LLD's are from Regulatory Guide 4.14* Efllucnt Concentration provided by Dcnison Mines t I T I I I Quartery'Date $amplcd Ait Volume Radionuclide Concettration pCi/mL Error Estimate pCilmL L,L.D. pCi/ml, Efflucnl Conc.* rCi/mL 7" Etfluent Concentration c08040302-003 First Quarter 2008 AirVolumein mL L36E+t I ,utu 1.25E-16 N/A 1.008-16 9.008-r4 1.39E-01?rolfr 1.00E-16 N/A 1.00E-r6 3.00E-14 < 3.33E-0r226Rat.00E-16 N/A 1.00E-16 9.00E-t 3 < l.lIE-022loPb4.09E-1s 3.04E-16 2.00E-15 6.00E-l 3 6.818-01 I t ENEEGY LABoRAToBtEg, !Nc. . zi93 satt Greek Highway (8260t) , po. Box J2s8 , caspet; wy8z60?Totl Free 888.23i.0515 . s1zi' -',05t5 . Fax J02834.61s ;biiiiideiircyla[.'q. , www.ehergylab.ioi- I T Client; Project: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 1st Quarter Enviromental Air c08040302-003 BHV4 Report Date; 05/29108 Collection Date: 01/01/08 DateReceived: 04fi7108 Matrix: Filter I Analyses Result Unlts Quallflers RL MCU QCL Method Analysls Date / By f.0 I t T I T T I I I T I I TRACE METALS Uranium, Aclivity R,ADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (t) Thorium 230 Thorium 230 precision (t) Radium 226 Radium 226 precision (t) Radium 226 MDC 17.4 pCi/Filter 557 pCi/Filter 21.9 pCi/Filter 9.1 pCilFilter 2.0 pci/Filter 1.9 pCi/Filter 1.8 pCi/Filter 2.7 pCi/Filter sw6020 E909.0M E909.0M E907.0 E907.0 E903.0 E903.0 8903.0 44128t08 02:25 / ts 0411710810:30 / dm 04117108 10:30 / dm 04l'17t,0815:35 / dmf 04117108 15:35 / dmf 0412410815:29 / trs 0412410815:29 / trs 04i24n815:29 / ks Report Definitions: RL - Anatyte reporting timit. QCL - Quatity control limit. MDC - Minimum detectable concentration MCL - Maximum contamlnant levet. ND - Not detected at the reporting limit. U - Not detected at minimum detectable conoantrafionT I I I T ENEfiGY LABofrAToHtEs, tMc. . zgga satt creek flqlway (se60t) , p.o. Box JZ58 , caspe4 wy 82602Totl Frce 888.235.0515 , 307.1' ,tti . rax soi.ii+. t63s :b{rpriai"iilsyfit;ri*- **w;;;;A;iab.;;;;- I I I T I I t Quartety'Date Samplcd Ail Volurne Radionuclidc Concentrntion pCi/mL Error Estimate rCilmL L.L.D. pCi/ml, Elllucnt Conc.* rrlli/mf . 7o Elllucnt Concentration c08040302-004 First Quarter 2008 Air Volurne inml, 1.36E+11 n.tU 3.16E-16 NIA 1.00E-16 9.00E-r4 3.51E-01?30Th 6.r7E-16 4.268-17 1.00F-16 3.00E-14 2.06E+00226Ra3.70E-16 1.678-17 1.00E-16 9.00E-13 4.11E-022roPb4.82fr15 r.75E-16 2.00E-15 6.00E-13 8.03E-01 LIJ)'s are from Regulatory Guide 4.14* Effluent Concentration provided by Dcnisou Mnes I T T I I t t t I T I ENERGY LAB0RAT0R1ES, tNQ: ._239s sa/t creek Highway (82601) , po. Eox l-ps7 , caspe4 w826027b//Free888.zss.05ri ' s?zl' ,sts , Fax a0z.zs4.t6bs .'cisiiiaieriersyhi.bi=-- ww*.iiiigiiab.-c;;- T I Cllent: Project: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp lst Quader Enviromental Air c08040302-004 BHV 5 Report Date: 05/29/08 Collection Date: 01/0'l/08 DateReceived: D4l17fi8 Matrixl Filter I Analyses Result Units Quallfiers RL MCLI QCL Method Analysis Date / By 0.2 1.0 o.2 43.4I T I t I I T I I t t I TRACE METALS Uranium, Activity RADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (t) Thorium 230 Thorium 230 precision (*) Radium 226 Radium 226 precislon (r) Radiurn 226 MDC pCi/Filter 657 pCi/Filter 23.8 pCilFilter 84.1 pOi/Filter 5.8 pCi/Filter 51.9 pOi/Filter 5.0 pCi/Fitter 2.6 p0i/Filter sw6020 E909.0M ES09.0M E907.0 E907.0 E903.0 E903.0 E903.0 04128t08 02:29 / ts 04117108 10:30 / dm Mll7l08 10:30 / dm 0411710815:35 / dmf 04117108 15:35 / dmf Ml?410815:29 / trs O4l24lO8 15;29 / trs 0/.l24l08 15:29 / trs Report Definitions: RL - Analyte reporting limit. QCL - Quality control limir. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit.I t ENERGY LAEORAT0RIES, lMpr.._e39! sat! creek Highway (s?60/) , p.o. BIxJZSS , casperi wBZ602Toll Free 888.2si.051s , s02.,. cits , Fax Jzz#a. /6-3i :cispiicienergytaS,'c(=-- m4*;;;;rityirb;;;' t T I I I I I I T I I t I t I t t LLD's are from Rcguhtory Guidc 4.I4 * Efllucnt Conccntrstion provided by Dcnison Mines I T I{IGH VOLUME AIR SATVIPIING REPORT CLIENT: REPORTD.{TE: PROJBCT: SAMPLEID: DENISONMINES lVlay 29,2008 1st Quarter 2008 Environmcntat Air $nmpling BHV-6 Quarter/Datc Sampled Air Volume Rndionuclide Concentration pCi/mL Error Estim*tc uCi/ml. L.L.D. pCi/mL trfflucnt Conc.* pCi/mL 7o Efflucnt Concentration c08040302-005 First Quarter 2008 Air Volume in ml.r 1.36E+l I o.tu 4.348-16 N/A t.00E-r6 9.00E-14 4.83E-01?lorh 3.5 tE-r6 3.388- r 7 I.00E-t6 3.00E-14 LI7E+00226Ra1.00E-t6 N/A 1.00E-r6 9.008-r3 < l.t lE-02xr0Pb5.99E-r5 t.948-r6 2.00E-15 6.00E- r3 9.98E-0 r I I ENEfrGY LASORATORi\S! WG , 239J Salt Creek Hlqlway (5260/) , pO. Bax S2iB , Caspe4, Wyaz60zrotl Free 888.p35.0sts ' s0z1' '' ohs-; Ei ibi.iii,ibis':L;7fr;;dr;;;y&"b"c,. . www,enersytab.com I I Client: ProJect: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp 1st Qua(er Enviromental Air c08040302-005 BHV6 Report Date: 05/29108 Collection Date: 01/01/08 DateReceived ; 04107108 Matrix: Filler I Analyses Result Units Quallfiers RL MCUQCL Method Analysis Date / By 0,2 1.0 0.2 t I I I I T I I t T I I TRACE METALS Uranium, Activity RADIONUCLIDES -TOTAL Lead 210 Lead 2'10 precision (r) Thorium 230 Thorium 230 precislon (r) Radium 226 Radaum 226 precision (r) Radium 226 MDC 5S,5 pCi/Filter 816 pCi/Fitter 26.5 pCi/Filter 47.9 pCi,/Filter 4.6 poilFilter 1r.5 pci/Fitter 2.6 pci/Filter 2.4 pCi/Filter sw6020 E909.0M E909.0M E907.0 E907.0 E903.0 E903.0 8903.0 04128108 02:33 / ts 0411710810:30 / dm 04/17108'10:30 / dm O4l17l0g '15:35 / dmf 0411710815:35 I dmf 0412410815:29 / trs 0412410815:29 / trs 0412410815:29 / trs Report Definltions: RL - Analyte reporting limit. QCL- Quality controt limit. MDC - Minimum detectabte concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit.t I I t ENEBQY LABORATQR0EST tNpr.._Zse! Sa!-grpp( flql*ay (s260, . p0, Box *ZSB . Caspil Wysz60zrott Free BBB.2t5.0st5 ' szz.i nsts . Fax s0z.zl4.t63i 1;;p;;dei;rgyh;;i--- **iiiiibiirb.rZi- I I CIient; Project: Lab lD: Client Sample lD LABOMTORY ANALYTICAL REPORT Denison Mines (USA) Corp 1st Quarter Enviromental Air c08040302-006 Blank Report Date: 05/29/08 Collection Date; 03/3'll08 DateReceived : 04107 108 Matrix: Filter I Result Unlts Qualifiers RL MCU QCL MethodAnalyses Analysls Date I By o.2 't.0 t I I T I T I I I t T I TRAGE METALS Uranium, Activity RADIONUCLIDES. TOTAL Lead2lA Lead 210 precision (r) Thorium 230 Thorium 230 precision (r) Radium 226 Radium 226 precision (r) Radium 226 MDC 4.4 pCi/Filter 0.0 pCi/Filter 1.3 pCi/Filter 4.4 pci/Filter 0.8 pci/Filter -0.4 pCi/Filter 1.5 pCi/Filter 2.6 pCi/Filter sw6020 E909.0M E909.0M E907.0 E907.0 E903.0 ES03.0 E903.0 04n8rc8 02:50 / ts 04117108 10:30 / dm M11710810:30 / dm 0411710815:35 / dml 0411710815:35 / dmf Mn4l08 15:29 / trs 04l24tOB 15:29 / trs 04124108 15:29 / trs Report Definitions: RL - Analyte reporting limit. QCL - Quality conbot limit. MDC - Minimum detectable concenlration MCL - Maximum contaminant level. ND - Not detected at the repoffng timit. U . Not detected at minimum detectable concentrationT T I I ENEHGY LABORATOR0E1, tNC. . psg? Salt Creek flqlway (se60t) , pO. Box.llSB . Casper; WyBz60ZTotlFree888.235.0515 . 30i -q.05t5 . Fax sz4.zs4.tobs :'rispiicieiirsyh"it, .wwraiiirbyao.coi- t I I I T ANALYTICAL SUMMARY REPORT May 29, 2008 Denison Mines (USA) Corp 6425 S Hwy 19'l Blanding, UT 84511 Workorder No.: C08040302 Project Name: 1st Quarter Enviromental Air _----Energy Laboratories, lnc' received the following 6 samples from Denison Mines (USA) Corp on 4nn1ogfor analysis. Sample lD Client Sample lD Collect Date Receive Date Matrix Test c08040s02-001 BHV 1 T 01 101 tol 00:00 04/07/08 Filter Metats, Total Digestion, Total Metats Lead 210 Radium 226 Thorium, lsotopic c08040302-002 BHV2 01/01/08 00:00 04/07/08 Filter Same As AboveIc08040302-003 BHV4 01 lll lO8 00:00 04/07/08 Filter Same As Above c08040302-004 BHVs 01/01/08 00:00 04/07/08 Filter Same As Above T c08040302-005 BHV6 01 lll IOA 00:00 0,U07l08 Same As Above C08040302-006 Blank 03/31/08 00:00 04/07/08 Same As Above I T I I t I I I t As appropriate, any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, theOA/QC Summary Report, or the Case Narrative. lf you have any questions regarding these tests results, please call. ReportApprovedBy: &r# I t ENERGY LABaFAT0HF:|, tNc.'-2393 sa/r creek ltlqlway (s260/) , pa Box 3zs8 . casper, wyap60zrotFree888.235.05t5 . 307..''. tio-: iriubiiii.ioi:s,,:L;,ri:ridrii;siE\:q. .wrtnenorsy/ab,com I I QA/QC Summary Report Client: Project: Denison Mines (USA) Corp 1st Quarter Enviromental Air Report Date: 05129/08 Work Order: C08040302 111 95 I I I I Analyte Method: E903.0 Sample lD: c080403S6-0OlAMS Radium 226 Sample lD: C080403S6-0O1AMSD Radium 226 Sample lD: M8,18283 Radium 226 Sample lD: LCS-18283 Radium 226 Result Units Sample Matrix Spike 70.7 pOitFitter Sarnple Matrix Spike Duplicate 60.7 poitFitter Method Blank -s pCi/L Laboratory Control Sample 11 pCi/L Run: BERTHOLD 720_O8O4t7A 70 130 Run: BERTHOLD 770_080417A 70 130 15 Run: BERTHOLD 770_080412A Run: BERTHOLD tTO_OgO41t A98 70 130 RL %REC Low Limit High Limit RPD RPDLtmit euat I Batch: 18293 04124108 15:29 04124108 17i25 26.7 04/25i08 07:03 U 44125108 A7.AZ I I I T Mothod: Sample lD: Thorium 230 E907.0 c08040302-005AMS Batch: 18283 A4t17lOB 15:35 04l17tOB 15:35 04117fiA 1Si3S 0.2A 68 70 130 3, lhe low response is oonsidered to bematrix related. The batch is approved. Sample lD: C08040302.00SAMSD Sample Matrix Spike Duplicate Thorium 230 7g.7 pCi/Filter O.2O 69 r.r JU tt;:fi1"r:ff[:i]T;: ;f,#"-"jr!:"i$:ptance ranse ror lhis analvsis. sincs the Lcs and rhe RpD for the MS MSD pair are acceilabre, rh€ row response is consrdered ro be 30s Sample lD: LCS-R10O2{6 Thorlum 230 Sample lD: MB-R100216 Thorium 230 Sample Makix Spike 75.7 pCi/Filter Laboratory Control Sample 49.0 pCi/Filter Method Blank 0.1 pOilFilter Run: EGG-ORTEC_OBO41 7C Run: EGG-ORTEC_08041 7C102 70 130 Run: EGG-ORTEC_080417C Run: EGG-ORTEC_08041 ?C 04/17108 15:35 70 130 5.1 0.20 1.0 1.0 t T I I t - spike response is oursrde or rhe acceo,"n"" ,"nr" ,o. ,ii'rrri;: li; "" rcs ,no lil uso .,3'"*"o,rr. lX o.t"r, i, "Jpl"0*0. 1.0 57 Method; E909.0M Sample lDl C080it0302-001AMS Sample Matrix Spike Batch: 18293 Run: PACKARD 310OTR_080417A 04/.,7/08 1O:30 Run: PACMRD 3100TR_OS0417A O4t17tOB 1Oi3O120 70 130 39 30 R Run: PACI(ARD 31OOTR-0BO417A 04/.17108 to:30 Run: PACI(ARD 3100TR_080417A 04/.t7108 10:30105 70 190 Lead 210 MB-Rl00552 Lead 210 Sample lDr LCS"R100E52 Lead 210 1550 pCi/Filter Method BlankND pCru Laboratory Control Sample 130 pCi/L Sample tD: C08040302-001AMSD Sampte Matrix Spike Dupticate Lead 210 2300 pCi/Filter I T RL - Analyte reporting timit. R - RPD exceeds advisory limft. U - Not detected at minimum detectable concentration ND - Not detected at the reporting limit. S - Spike recovery outside of advisory limits, ENERCY LABO4ATOfr1ES, tNC., ZJIJ Satt CreekroiFiiiiaaz{slriiT:'ihz{ -05t5 . ru sorzsa.llg!-:[!!69i3;:;grwl;,f,::l:iiffi:ifi, QA/QC Summary Report Client Denison Mines (USA) Corp Projech 1st Quarter Enviromental Air Report Date: 05/29/08 Work Order: C08040302 0.6100 I I t I I t t T I I T t T I I t I t I RL %REC Low Limlt High Limtt RPD RPDLimit Quat i Method: Sample lD: Uranium Sample lD: Uranium Sample lO: Uranium Sample lD: Uranium sw6020 MB-18283 LCS,t-18283 c08040520-001AMS c08M0520-001AMSD Method Blank ND mg/fitter 6E"0S Laboratory Conhol Sample 0.0509 mgtfitter 0.00030 Sample Matrix Spike 4.0497 mg/fitter O.OO030 Sample Matrix Spike Duplicate 0.0500 mgffitter 0.00030 Run: ICPMS2-C_0BA4ZZA Run: ICPMS2-C_08A421A 75 125 Run: ICPMS2-C;08A421A 75 125 Run: ICPMS2{_0B04ZlA 75 125 Batch: 18283 04/28/08 02:00 04128108 O2:O4 04/28tl08 04;00 04128108 04:04 20 Qualifiers: RL - Analyte reponing limit.ND - Not detected at the reporting limit. I I Id fiEllI il$'vrl tr'cl 6rElf € Il.F ; li FsI O- IEg g .l.s * E llf 5E llE l"ell€6 o -{EE EsIEE 8rlf;iE:l.c o <rl6r;'leE ;{o= X ,IEi E ll5; € IEi Eal .E=t:iIEOE ileeEiI;EEil'EE e IEE Eil#iii il$;$ ll,E# 6 IEF*I'i- o €IFE (tr IEEElo9,o lfl* rE}b;9= Es € .=mt Etr u#r g$ I frE IrF r fr;.=b TF# -ALOtfgF'{5L(E I$E oe TE$oattbri?d, I --I r $ff1 HH T I T T zzz "gffi{ ,\$ussE -r,- { AT =$t gH gIE E'F€ l5a uvl)punoreurnll4snu (U LE.o slU)EC ?HEg "'-H'E"E p -EGd€ E\(,, h NN N ltlt\$ u,-tF J.d\s )- o it- EoaE() taqlo /tessPolE xuo[e1a6?nspllos/sl;og.releurgp EOgnS11iV:ad/U€pu,ES ksJsulEuoC Jo JoqunN = hF\r- &s do h!: nA,4 4{ .JoJ D =o tr 0-F > =BLt-0)b€(Lo Lotr Ee oou.too.ot 6-9 o l.HF5 E',*EY I o b CLoeil 8go9iiJ 5E YE n€t5 E.E Ett6IEOE flE n EEfig6E=o I I t T I I I T I T I t T I I t I I I Workorder Receipt Checklist Energy Laboratories Inc Denison Mines (USA) Corp Login completed by: Jennifer McVay Reviewed by: Reviewed Date: Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample botttes? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper conlainer/botile? Sample containers intact? Sufficient samplo volume for indicated test? All samples roceived within holding time? Containen/Temp Blank temperature in compliance? Water - VOA vials have zero headspace? Water - pH acceptable upon receipt? Yes [l Yes fl Yes I Yes [l Yes fl Yes ffi Yes ffi YoM Yes B] Yes Bt Yes [l Yes ! Yes I Not Present I Not Fresent I Not Present EJ "C NA NoVOAviatssubmifted d NotApplicable V lllff$ililtllililtf tlliltfl tilfl iltrfl tilil !fl il$ c08040302 Date and Time Received: 4filZO0g g:30 AM Received by: ah Carrier name: 2nd Day Air NoE NoE NO fI No! Non NoE Non NoE NoI NoE NoE Non NoI I I ENERGY LABOEATOBIES, lNC. ' 2393 Sali Creek Highway (82601) . PO. Box 3258 ' Caspe4 WY82602 Ta/| Free888.235.0515 . 307.2 ll5 ' Fax 302234./639 , casper@energylab.cq vww.energylab.com I Date: 29-May-08 I CLIENT: Project: Denison Mines (USA) Corp 1st Quarter Enviromental Air CASE NARRATIVE Sample Delivery Group: C08040302 t I I I I T I I I I I I t I THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4.C (*2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shalt 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 a drinking water melhod for low TDS walers. 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 (2 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 ofcounting should not exceed 8 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 individuat Aroclors. \A/hen 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. lf 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, lnc. - Billings, MT eli-g - Energy Laboratories, lnc. - Gillette, \A/Y eli-h - Energy Laboratories, lnc. - Helena, MT eli-r - Energy Laboratories, lnc. - Rapid City, SD eli-t - Energy Laboratories, lnc. - College Station, TX CERTFICATIONS: USEPA: WY00002; FL-DOH NELAC: E87641; Arizona: A20699; California: 02118CA Oregon: \Aff200001; Utah: 3072350515; Virginia: 00057; Washington: C'I903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, lNC. - CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accredlting 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 ELI's 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. I I I I I I I I I I I I I I I I T I I I Periodl March 31, 2008 through June 30, 200g {2nd euarter 200g)Pqe 1 BHV-1 on stream o/o Week Filter Start Week BHV-2 on stream % Filter Start BHV-4 on stream % Filter Start 91.3% Stop BHV.1 Start Total volume: Total Total Volume: Total 4.40E+06 Loading, PerCent 4.75E+06 Loading, Per Cenl 96.6olo Stop Stop Stop Stop BHV.z Start Total Total Total Week # 91.0% Stop 8HV.4 Start Total Volume: 4.38E+06 Total Loading, Per Cent On BHV-s on stream % Fitter Shrt 97.7% Stop BHV.5 Start Time Total Volume: Total 4.71 E+06 Loading, P6rCent Weel # Date Tare I 2l 4 5 6 7 8 9 l0 lt t2 l3 78t6149 7816743 7816737 78t6731 78t6725 7815719 78167t3 78t6707 78t670t 782tt95 7821 189 7821 183 782tt77 3l-Mar-08 07-Apr08 l4-Apr-08 2l.Apr-08 28-Apr-08 05-May-O8 l2-May{8 l9-May-08 26May-08 02-Jun-08 09-Jm-08 lGiun-O8 23-Jun-O8 7-Apr-08 l4-Apr-08 2l-Apr-08 28-Apr-08 5-May-08 l2-May-08 l9-May-08 2GMalaQ$ 2-Jun-08 9-Jun-08 l5-Jun-08 23-Jun-08 30-Jm-08 4.6582 4.64f6 4.9013 4.8096 4.9126 4.5689 4.6986 4.7626 4.7068 4.5928 4.5s56 4.6439 4.8090 4.4840 4.5036 4.s226 4.5550 4.5699 4.5605 4.5550 4.5511 4.551j 4.4363 4.4442 4.4540 4.5567 0.1742 0. t430 0.3787 0.2546 0.1427 0.0084 0.1435 0.21 l3 0.1495 0. I 565 0.21l4 0.1899 o )\)7 2683.6 2E54.1 302s.0 3l 89.3 33s8.2 3358.2 3525.4 3697.5 3839.2 4008.5 4176.5 4342.2 4511.9 2518.0 2683.6 2854. I 3025.0 3189.1 3358.2 3358.2 352s,4 )697.5 3839.2 4008.5 4t76.5 4342.2 SCFM 10230.0 t0255.2 9856.8 r0t3 t.6 0.6 10031.4 10329.0 8498.4 l0l6t.6 10079.4 9938.4 to,z t ),6u2 10,718,210 10,144,612 t0,327,t99 10,615,t l4 629 t0,48t,726 10,792,686 8,8?9,907 10,53 1,,148 10,389,1 73 r0,243,819 10,494,926 124A92,070 0.0170 0.0t33 0.0352 0.0247 0.0323 t3.3623 0.0137 0.0196 0.0168 0.0149 0.0203 0.0185 0.0240 98.60/"16.5 37.0 17.0 17.0 37.0 37.0 36.9 36.9 36.9 36.6 36.4 35.4 36.4 l0l.5o/o totiq, 97.8% 100.5% O.0o/o 99.5% 102.50/; 84.3o/o 100.87o 100.00/o 98.60/o iorJ-%Totals 9l 2184.0 4.7205 4.5192615 I t9633.4 9l.3o/o 36.8 Date Tare Net'l 2 3 4 5 6 7 8 s 10 11 12 t3 7816748 7816742 7816736 7816730 7816724 7818718 7816712 7816706 782120A 7821194 7821188 78211E2 7821176 3i-Mar-06 07-Apr-08 'lz1-Apr-08 21-Apr-08 2&Apr-08 05-May-08 12-May-08 1$'May-08 26-rvhy-08 02-Jun-08 0$Jun-08 16-Jun-08 2$Jun48 u/-Apr-u6 1zt-Apr-o8 21-Apr-08 28-Apr-08 05-May-08 12-lray-08 '19-tilay-08 2s'ltihy-o8 02-Jun-08 0$Jun.O8 16-Jun-08 23-Jun-08 30-Jun-08 4_6725 4.7231 4.9046 4.9145 4.9245 4.9140 4.n50 4.8020 4.6945 4.6826 4.9677 4.9012 4.96s3 4 4.5046 4.€53 4.5480 4.5729 4.5605 4,5691 4.5645 4.4242 4.4111 4.4027 4.4591 4.5403 4939 0.1786 0.2185 0.4193 0.3665 0.3516 0.3535 0.2059 0.2375 0.2703 0.2715 0.5650 o.4421 o.4250 1t6dJ,t 13054.1 13225.1 't3389.4 13558.2 13725.3 13890.3 14061.4 14203.1 14369.2 14537.3 14702.9 14A72-6 12f 19.7 12883.7 1 3054.1 13225.1 13389.4 13558.2 13725.3 13830.3 14061.4 14203.1 14369.2 14537.3 14702.9 9839.4 10225.2 10260-0 9855.8 lot29.2 10025.4 9904.2 10266.0 8501.4 9963.0 10086.5 9913.6 10t 87.4 10,169,659 10,713,18.1 14,749,641 1 0,327,1 99 10,612,599 10,503,846 10,348,816 10,726,858 8,883,042 10,325,619 {0,396.594 10,238,892 u.ullb 0.0204 0.0390 0.0355 0.0331 0.0337 0.01 99 o.0221 0.0304 0.0263 0.0543 0.0432 0.0405 97.6% SCFM 35.5 37.0 37.0 37.0 37.0 37.0 36.9 36.9 35.9 36.6 36.4 36.4 36.4 1Q1.4Yo m1H' 97.W6 100.5% 99.57o 98.3%i6iE 843% 98.8% loo.1% 98.5%ibmTotals9121U.0 4.833962 4.5027A 0.3312 1?91tlj.z 1 34,496,437 0.0320 98.67o 36.8 07-Apr-08 1zt-Apr-o8 21-Apr-08 28-Apr-08 05-May-08 12-May-08 't9-May-08 26-May-08 02-Jun-08 09Jun-08 lGJun-08 23Jun-08 'lz1-Apr-06 21-Apr-08 2&Apr-08 05-May-08 12-May-08 19-May-08 26-lrilay-o8 02-Jun-08 09-Jun-08 16-Jun-08 23-Jun-08 30-Jun-08 1,013,987 10,374,347 'to.317,77A 10,551,622 10,662,890 10,424,048 12,037,779 9,09s,573 10,590,522 1 0,1 54,165 8,501,075 07-Apr-08 14-Apr-08 21-Apr-08 2&Apr-08 05-May-08 12-May-08 1$May-08 26-May-08 02-Jun-08 09-Jun-08 16-Jun-08 2$Jun-08 1+Apr-08 21-Apr-08 28-Apr-08 05-May-08 12-May-08 1 9-May-08 26-iray-o8 02-Jun-08 09-Jun-08 lGJun-O8 2&Jun-08 9,816,749 10,766,6'15 10,31 9,656 10,563.566 10,657,861 1 0,377,655 12,032.763 9,474,257 10,612,287 10,'t52,928 8,519,010 I I Perlod: March 31, 2008 through June 30, 200g (2nd euarter 200g) BHV-6 on stream %97.7Yo Stop Stop Page 2 BHV.6 Start Total Volume: TotalTotal 4.71 E+06 Loading, PerCent I I W€ek Filler ALL BHV on stream o/o Start 95.ZYo Stop T t I I I Gross NetT 1 2 3 4 5 6 7 8 I 10 11 12 13 t ll'16 t 4b 7816739 7816733 7E16727 7816721 7816715 7816709 7816703 7821197 7821191 7821185 7821179 7821173 31-Mar-08 07-Apr-08 '14-Apr{8 21-Apr-08 2&Apr-08 05-May-08 12-May{8 1$May-08 26-May-08 02-Jun-08 og-Jun-08 16-Jun-08 23-Jun-08 07-Apr-08 14-Apr-08 21-Apr-08 2&Apr-08 05-May-08 12-May48 19-May{8 26-May{8 02-Jun-08 09-Jun-08 16-Jun-08 2&Jun-08 30-Jun-08 4,6924 4.7047 4.9026 4.8782 4.8562 4.8'175 4.7187 4.7957 4.s303 4.5W2 4.6414 4.7391 4.7943 4.4888 4.5394 4.47A8 4.5752 4.5459 4.558S 4.5684 4.s867 4.3788 4.4514 4.4257 4.5646 4.5568 a=T'rd5i 0.2036 0.1653 0.4318 0.3030 0.31 03 0.2586 0.1503 0.2090 0.1515 0.1288 0.2157 0.17,f5 0.2375 12M7.6 12603.8 12775.1 1 2939.3 1UA7.2 13276.8 13442.6 1 3634.5 13779.5 13949.9 14114.1 14251.9 14416.0 12282.9 12447.6 12603.8 12775.1 12939.3 13107.2 1 3276-8 13442-6 13634.6 13779.5 13949.9 14114.1 14251.9 98E5.0 9370.2 taz77.4 9849.6 t4076.4 10173.0 9948.6 r 1517.6 8694.0 10228.8 9849.0 8267.4 9846.5 10,2't6,789 9,817,377 10,767,872 10,319,656 10,557,279 10,658,490 10,395,209 12,034,644 9,084,288 10,601,094 10,151,692 8,521,4U 10,149,218 0.01 99 0.0168 0.0401 0.0294 0.0294 0.0243 0.012t5 0.0174 0.0167 0.012,t 0.o212 0.020s 0.0234 98.1o/o 16.5 37.0 37.0 37.0 37.0 37.A 36,9 36,9 36.9 36.6 36.4 36.{ 36.4 93.0% 102.0o/o 97.TYo 100.0% 100.9% 98.70h 114.3o/offi 141.50/" 97.70h 82.oda Totals 91 21U.0 4.743177 97.7Yo o.226'.1 127583.6 f33,275,0S1 0.0220 97.7%36.8 *Net 1 2 3 4 5 6 7 8 o 10 11 12 13 t61ti(44 7816738 7816732 7816726 7816720 78't6714 7816708 7816702 7821196 7821190 7E211Il/. 7821178 7821172 31-Mar-08 07-Apr-08 14-Apr-08 21-Apr-08 28-Apr-08 05-May-08 12-May-08 1$'Itilay-O8 26-May-08 02-Jun-08 09-Jun-08 16-Jun-08 23-Jrrn-O8 07-Apr-08 l4AprOg 21-Apr-08 2&Apr-08 05-May-08 12-May-08 l9May-08 26-May{8 02-Jun-08 09-Jun-08 16-Jun-08 2}Jun-08 lIL.lrrnit 48504. 4.5404 4.5444 4.5629 4.s605 4.5530 4.5773 4.5791 4.21008 4.4308 4.4486 4.5672 4.5676 Totals 91 21U.O 4.s23E Total Start Filler I I I t I I T t t I t I I I I I I I I Period: . Janua{y 1, 2008 through March Bl ^q0B {fst euarter 2008) BHV-I on stream o/o 100.0% StopStarl Stop BHV-2 on stream %1 00.07o Stop Stop BHV-4 on stream %99.9P/o Stop Stop BHV.1 Start BHV.2 Start BHV-4 Start BHV.5 Sla( i Total volume: Total Total Volume: Total Total Volume: Total Total Volume: Total Page 1 Week Wssk Filter Filter Number Start Week BHV-s on stream o/o Filtgr Starl W€ak Stop Total Tolal Iotel 4.82E+06 Loading, PerCent 4.82E+06 Loading, PerCent 4.81E+06 Loading, P6rCent 4.81 E+06 Loading, PerCent s9.9% Stop # Number Date Iare Time Time 2 3 4 5 6 7 9 l0 lt l? l3 7816027 78 t602 I 78 t60t 5 ?8 I 6009 78 r6001 7816797 78 r679t 78 r6785 78t6779 7816773 '18t6767 78r676r 781 6756 -Dec-073I 07-Jan-08 l4-Jan-08 2lJan-08 28-Jan.08 04-Fe!-08 I I-Feb-08 l8-Feb-08 2i-Feb-08 03-Mar-08 l0-Mar08 l8-Mar-08 24-Mar-08 7-Jan-08 l4.Jan.08 2 l-Jan-08 28-Jan 08 4-Fcb-O8 t l-Feb-08 t8-Feb-08 25-Feb-08 3-Mor.08 l0-Mar08 l8-Mar-08 24-Mar-08 3l-Mar-08 4.5779 4.54 l2 4.s730 4.5392 4.5387 4.4454 4.4'139 4.5025 4.5548 4.5i40 4.6752 4.6233 4.7680 4.4654 4.4792 4.472t 4,4447 4.4489 4.374't 4.3995 4.4380 4.4972 4,4838 4.s210 4.4881 4.5108 0.0620 0.1009 0.0945 0.0898 0.0707 0.0744 0.0645 8-0676 0,0702 0. t542 0.r350 0.2572 t?50.501.? 670, I 838.9 r0r0.0 l I 73.3 r343.6 1510.9 168 1.5 1849.1 2012.3 2 r 81.9 2348.8 2518.0 334.7 501.7 674.1 838.9 r 0 I0.0 I 173.3 r 343.6 r5 t0.9 r68 t.5 t849.3 20 12.3 2l8l.9 2348.8 10t04.0 l0 I 28.0 10267.8 9801.0 t02t2.6 10040.4 10238.4 10065.0 9't79.4 l0 I 802 toot2.? 10150.8 17.6t00 10J53,840 10J86,19? 14,6il"342 I 0,?5?,8 I4 10,268,736 t0,699,979 10,491,130 t0,698,0t9 r0,s16835 10,115,337 t0,493,070 10,3 19,907 10.462-767 0.0059 0.009s 0.0088 0.0087 0.0066 0.007t 0.0050 0.0064 0.0069 0.0t47 0.0131 0.0246 1090.0 99.4% 100.20/o 100.s9,0 10t,90/o 97,20A t01.3% 99.6% 101.6% 99.Y/'" 97.0o/o 88.49'o n5.9% 100.7c/o 36.5 37.0 37.0 31.0 37.0 37.0 36.9 36.9 36.9 36.6 16.4 J6.4 36.4Totals9l2t 84.0 4.5667 4.46?.584(0.I{xl 130997.4 136.394_S71 0.0099 100.3%36.8 TimeGross 1 2 3 4 5 o II 10 11 12 13 t61AAi/A 7816020 7816014 7816008 7816002 7816756 7816790 781678/. 7816778 7816772 78 t6766 7816760 7816755 J1-USA-Ot 07-Jan-08 l4-Jan-08 21-Jan-08 28-Jan-08 04-Feb'08 1 1-Feb-08 1&Feb-08 2FFeb-08 03-MaG08 10-Mar{8 1&Msr-08 24-Mar-08 07-Jan-08 14-Jan-08 21-Jan-08 28-Jan-08 04-Feb-08 't1-Feb{8 'l&Feb-08 25-Feb-08 0&Mar-08 1O-Mar.0B 18-Mar-08 2+Mar-o8 31-Mar-08 4.6639 4.5726 4.6501 4.6110 4.5755 4.4600 4,5264 4.4590 4.6036 4.5623 4.6685 4.5929 4.7243 4.45t',| 4.4789 4.4735 4.4562 4.4394 4.3757 4.4424 4.4275 4.4833 4.4796 4.5203 4.4846 4.4913 0.2078 0.0937 0.1766 0.1s€ 0.1361 0.08lli! 0.0840 0.0315 0.1203 4.0827 o.1482 0.r083 o_2330 1UtV1,t 10870.2 'l 1038.9 11210.2 11373.1 1 1543.6 11711.4 11881.4 12045.2 12212.7 12382.1 12548.9 12719.7 1UCir4. / 10701.7 10870.2 11038.9 112'tO.2 1 1 373.1 11543.6 11711,4 11881.4 12049.2 12212.7 12382.',| 12548.9 10020.6 10107.5 t0r 23.8 t0276.2 9?74.6 10234.2 10063.2 t0205.4 10066.2 98t0.6 t0t59.8 t0009.8 fitta7 a 10.:t56,941 10,589,968 10,606.942 10,756,615 10,241,O77 10,722,610 10,514,954 10.663,537 10,5 t 8,088 1 0,1S7,672 10,472,O43 10,317,433 l0 562 336 0.0201 0.0088 0.0166 o.au4 0.0133 0.007s 0.0080 0.0030 0.0114 0.0081 0.0142 0.0105 o_0221 !j9.4yo 100.3% 100.4% 10.1.9% 97.Oo/o 1O1.5o/o 99.B% 101.20h 99.S% 97.3o/o 88.2o/o 115.9o/o 1O1.7Yo 36.5 37.0 37.O 37.0 37.0 37.4 36.9 36.9 36,9 36.6 36.4 36.4 Tolsls sl 2184.0 4.sgom 4.462215 o.1278 131099.4 r136.500.216 Q.O122 100.3%36.8 TimeDate 2 3 4 5 6 I I I 10 11 12 13 /6 touzS 7816019 7816013 7A16007 781600'l 7816795 781 6789 7816783 7816777 7816771 7816765 7816759 7A1A7AA ., t -Lr€c-u / 07-Jan-08 14Jan-08 21-Jan-08 28{an-08 04-Feb-08 1 1-Feb-08 18-F€b-08 25-Feb-08 03-Mar-08 10-Mar-08 1&Mar-08 24-Mar-08 07-Jan{8 1+Jan.08 21 -Jan-08 28.Jan-08 04Feb-08 11-Feb-08 18-Feb-08 25-Feb48 03-Mar-08 10-Mar.08 18-Mar-08 24-Ma.-08 31-Mar-08 4.O411' 4.5071 4.5603 4.5246 4.3300 4.4894 4.5400 4.5060 4.5718 4.5821 4.729ts 4.6321 4.6269 +,.1u146 4.4743 4.4853 4.4570 4.4259 4.4109 4.4523 4.4348 4.488S 4.4S45 4.5243 4.4744 4.5027 U,UUbC 0.0328 0.0750 0.0676 -0.0959 o.o775 o.0877 0.4712 0.0829 0.0876 0.2051 0.1577 o.1242 t1J4.2 671.8 839.5 1011.8 1177.3 1344.9 1511.3 1679.7 1852.6 2013.3 2182.7 2349.6 2519-3 .r., /.o 544.2 671.8 83S.5 1011.8 1177.3 1344.9 1511.3 1679.7 1852.6 2013.3 2182.7 2349-A yyuo.4 r0055.4 10060.2 r0336.8 9911.2 10055.4 9988.2 10099.8 t0r77.6 9642.0 t0164.6 l00r 1.6 r0180.8 10,321,593 '10,535,277 10,540.306 10,830,107 10,405,150 10,535,277 '10,4{}6,587 10,553,197 10,843,468 9,992,936 10,476,991 10,319,289 10,493.689 U,UUUJ 0.0031 0.0071 0.0062 -0.00s2 0.0074 0.0084 0.0067 0.0076 0.0088 0.0190 0.0153 0-ol 1n 99.1% 99.80/6 99.8% 1O2.io/n 98.5% 99.87o 99.1yo 100.2% 103.070 98.7% 88.z\o 115.9% 10'1.0% 36.5 37.O 37.0 37.0 37.4 37.0 36.9 35.9 ,5.9 36.6 36.4 36.4 36.4Totals912184.O 4.549231 4.,t66931 0.0823 130890 'l:Jt'.z63-5tttt 0.0079 1W.2%36.8 Number Date T Time I 2 3 4 5 6 II 10 11 12 13 7816V24 7816018 7816012 7816006 7816800 7816794 7816788 7816782 7U6n6 7U6nO 7818764 7816758 7816753 31 -Dec.o7 07-Jan-08 14-Jan-08 21-Jan-08 28Jan-08 04-Feb-08 1 1-Feb"08 1&Feb-08 25-Feb-08 0&Mar-08 f 0-Mar-O8 18-Mar.08 24-Mar-08 u/-Jan-og 14-Jan-08 21-Jan"08 28-Jan-08 04.Feb-08 1 1-Feb-08 t8-Feb-08 25-Feb-08 03-Mar-08 10-Mar-08 18-Mar-08 24Mar-08 31-Mar-08 4.t Jtt4 4.5555 4.6129 4.5522 4.5362 4.4703 4.5655 4.5692 4.5695 4.5981 4.7562 4.6436 4.7612 4.4V20 4.47ffi 4.4808 4.4347 4.4038 4.3854 4.4733 4.5050 4.4787 4.4917 4.5472 4.4783 4.4836 u. lc44 o.0767 0.1321 o.1175 0.r326 0-0849 0.0922 o.0642 0.0938 0.1064 0.1890 0.1653 o )7'rA 'ru0zu.ti 10787.9 't0956.0 11128.2 't1294.5 1'1460.9 11628.0 11797.1 11969.5 1U31.A 12299.4 12466.2 1rAln O 1{1454.5 10620.6 10787.9 10S56.0 1',1128_2 11294.5 11460.9 11628.0 11797.1 11S69.5 12131.O 12299.4 12466.2 vrbf.4 10036.8 10089.0 10327.8 9980.4 9986.4 t0025.4 10r46.0 t034 1.6 9688.E 10107.0 I0008.6 10188.6 10,239,888 10,515,790 10,670,481 10,820,677 10,456,698 10.462,984 10,475,457 10,601,471 10,805,8s2 1 0,041,439 10,417,621 10,316,197 10.501 -729 0.0150 0.0073 0.0125 0.0109 0.0127 0.0081 0.0088 0.0061 0.0087 0.0106 0.0181 0.0r60 0.0264 98,97o 99.60/o 100.1% 102,1Yo 99.0% 99.1% 99.5% 100,70/o 102.60/o s6.r% 87.7Yo 115.8% 101.1Yo 16.5 3't.0 37.0 37.0 37.0 37.0 36.9 36.9 35.9 t6.6 36.4 ,6.4 36.4Totals2144.0 4.60052:4.474777 o.1297 1306St1.E fii86i286r282::r o.a124 100-20/"16.8 I I I week Period: January 1, 2008 through March 31, 2008 (lsteuarter 2008) Total Volume: Total Total 4-81E+06 Loading, PerCent Pago 2 BHV-6 on stream % Filter Start Number ALL BHVon stream 0,6 Start 99.9% Stop 99.9Yo $top Stop BHV.6 Star{ t I I t t I I I t t t I I t I I Week NetDateGrossafe Time Time Slream SCFM 1 2 4 5 6 7 8 I 10 11 12 13 7816023 781 601 7 781601 1 7816005 78167SS 78167S3 7416787 7816781 7816775 7816769 7816763 7816767 7816752 31 -Dec-07 07-Jan-08 14-Jan-08 21-Jan-08 28-Jan-08 04-Feb-08 11-Febt8 '18-Feb.08 25-Feb-08 03-Mar-08 10-Mar-08 18-Mar-08 Z4-Mar-Q8 07-Jan-08 14-Jan-08 2l-Jan{8 28-Jan-08 04-Feb-08 1 1-Feb-08 18-Feb-08 2+Feb-08 03-Mar-08 1O-Mar-08 18-Mar{8 24-MabA8 31-Mar.08 4.5743 4.5412 4.5837 4.5558 4.4909 4.4565 4.5t65 4.5677 4.5477 4.5629 4.6902 4.65't0 4.7452 .t.4ul o 4.4746 4.4742 4.4575 4.4112 4.3846 4.4422 4.5079 4.4713 4.4777 4.5307 4.5026 4.4858 u.u6b/ 0.0666 0.1095 0.0s83 0.w97 0.0719 0.0743 0.0598 0.0764 0.0852 0.1595 0.1484 0.2594 'tuzo/.u 1 0435.3 10603.0 10775.2 10941.4 11'107.9 11274.9 11443.5 1 1616.3 11778.1 1 1946.3 12113.1 12282.9 10101.4 10267.8 10435.3 10603.0 10775.2 10941.4 1U47.9 11274.9 11443.5 1 1616.3 11778.1 1'1946.3 12113.1 99E7.6 t0050.0 10061.4 10329.0 997t.4 g99t.2 10024.2 l0t 13.6 10368.0 9706.2 10095.0 1000s.0 10r86.2 10,322,833 10,529,620 10,541,564 10,821,934 10,447,269 10,468,013 'to.474,203 10,567,616 10,833.437 10,0s9,473 fi,405,252 10,315,578 10 4qq 265 u.u{]64 0.0063 0.0104 0.0091 0.0076 0.0069 0.0071 0.0057 0.0071 0.0085 0.0153 0.0144 o.0247 99.1olo 99-7q 99.87o 1O2.5lo 98.9% 99,10/o 99.4o/o 100.3% 102_go/o 98.3% 87.6% 115.80A 101.17o Jb., 37.0 37.0 37.0 37.0 37.0 36.9 36.9 36.9 36.6 36.4 36.4 36.4Totalss12184.0 4.575662 4.469838 0.1058 't 30891.B 136,266,046 i U-U]U]1OO.2o/o 36.8 Net 1 2 3 4 5 6 I 9 10 11 12 .13 7816022 7816016 7816010 7816004 7816798 78167S2 7816786 7816780 7816774 7816768 7816762 7816751 7A167F,n lJ1-Dsc-07 07-Jan-08 14Jan-08 21-Jan-08 28-Jail-08 04-Feb.08 1 1-Feb-08 18-Fsb48 25-F€b-08 03-Mar-o8 10-Mar-08 18-Mar-08 24.Mar-08 u/-Jan-04 14-Jan-08 21-Jan-08 28-Jan-08 0zl-Feb-08 11-Feb-08 'l&Feb-08 2$Feb-08 03-Mar-O8 lGMar-o8 1&Mar-08 2+Mar-08 31-Mar-OA 4.4783 4.4645 4.4422 4.4517 4.4179 4.3969 4.4444 4.4877 4.4897 4.5017 4.5004 4.4842 4.4747 Totals 91 21A4.O 4.464? ,..3) q:l .:J ($ + lr.) 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TENL IEo IE l?=a l# I I .9Tq"Y?Y ::HHHHHHI *r rrr 'lr Frr rl rrr.:c0caca@oo o()'3'€ s Q e r 99 orCf=F-HF--z I I T I t I I I I I T I t T I T I t I Badge Number l4 l5 l6 t7 18 ) Location BHV-I BHV-2 BHV.3 BHV.4 BHV-5 BHV.6 white Mesa Mill second Quarter 2008 Environmental spherical Gamma Monitor Results Total Days Mean Badge at Ambient Dose mRem / Date Issued Date Returned wMM Equivalent mRem / hour mRem / Day week 4/t5t2008 7/9/2008 85 30.8 0.02 0.362 2.54 4/15/2008 7t9/2008 85 30.6 0.02 0.360 2.52 4/15/2008 7/9t2008 85 29j 0.01 0.349 2.45 4ns/2008 7t9t2008 85 30.3 0.01 0.356 2.50 4115t2008 7/9/2008 85 30.6 0.02 0.360 2.52 4115t2008 7/9/2008 85 26.4 0.01 0.311 2.17 ea a;\ i?s u."v ";\ *:.er.;:c ,?.'ouo(o oa"% il+."*m '"#,1il .;:"" ii+. orl'o, {n.'%(o.- (o *.-oo* $; *, eol'o,^ %r.t CDY o =c .9 (E o CDo s oc .9 (gtr tro(,troo(oNNIGu t%^ 6^-*o €^-*o *r"*r, 'i-*",i?+ *ro {:*" t"r':'" .3*o lEl*:" ltltr, l?l'#r|fl ig" oil*.o *{9, *i:*" .*'i*" '";%tv +rl*o a:*" *r{:r" ig"t-<^ \/C lr)OI IJJoqr (clrog 0o1) CDY.\o5 tro o ooo E otr .9 TE trootroooFNIlto. I I I I I I I I T I T I t t I I I I t WHITEMESAMILL FORAGE RADIONUCLIDE DATA NORTH EAST OF MILL SAMPLED DATE Ra-226 Ra-226 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg 5.08-08 Pb-210 Pb-210 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg 1.0E-06 27-Aue-81 3.90E-04 1.0E-0s 5.0E-08 l.l0E-03 l.0E-04 l.0E-06 20-Oct-81 1.40E-04 l.0E-05 5.0E-08 6.80E-04 8.0E-05 l.0E-06 l5-Aor-82 l.3lE-04 1.3E-05 1.0E-06 4.908-04 7.0E-05 8.08-0s 0l-Jul-82 1.60E-04 1.0E-05 5.0E-08 8.00E-04 t.7E-04 t.0E-07 30-Nov-82 2.67F-06 l.lE-06 t.0E-06 1.08E-04 9.0E-06 t.0E-05 l3-Aor-83 9.368-0s 6.2F.06 8.0E-09 4.978-04 9.3E-05 l.0E-04 0l-Jul-83 t.t2E-04 1.2E-05 6.0E-06 1.84E-04 l.2E-05 l.0E-06 3O-Jan-84 1.09E-04 8.0E-06 4.0E-06 7.80E-04 6.28-05 6.0E-0s 28-Jun-84 3.47E-04 t.2E-05 2.08-09 3.75E-03 1.6E-04 4.0E-08 l4-Nov-84 5.61E-04 2.OE-04 2.08-07 7.82E-03 3.38-04 7.0E-08 27-Mar-85 1.058-03 3.0E-05 2.0E-06 3.228-03 r.4E-04 2.0E-05 l5-Jul-85 8.20E-05 7.0E-06 3.0E-06 7.70E-04 l.3E-04 2.0E-04 09-Oct-85 l.l5E-04 l.0E-05 3.08-06 5.108-04 3.0E-0s 2.0E-05 24-Mar86 5.728-04 2.lE-Os 4.0E-06 2.49E-03 l.0E-04 l.0E-0s l0-Jul-86 5.018-04 l.3E-05 3.0E-06 r.57E-03 l.7E-03 2.0E-04 l8-Dec-86 8.70E-04 5.0E-05 3.0E-06 6.80E-04 3.0E-0s 3.0E-06 20-Aor-87 5.90E-04 7.0E-0s 5.0E-08 r.50E-03 t.0E-04 r.0E-06 05-Jun-87 r.60E-04 3.0E-05 s.0E-08 9.50E-04 4.0E-0s l.0E-06 22-Dec-87 2.10E-04 4.0E-05 5.0E-08 1.70E-03 l.0E-04 l.0E-06 l9-Apr-88 4.50E-04 7.0E-05 5.0E-08 r.40E-03 l.0E-04 1.0E-06 28-Jul-88 3.20E-05 2.2E-05 s.0E-08 1.50E-04 4.48-04 l.0E-06 07-Apr-89 s.60E-04 4.0E-0s **{.1.10E-03 l.0E-01 *** 06-Jun-89 1.50E-04 2.08-05 X* {.2.308-04 2.0E-05 **x 07-Nov-89 6.00E-04 5.08-0s 7.0F-06 2.048-03 7.0E-05 l.4E-05 l7-Apr-90 2.60E-04 3.08-0s 4.08-06 3.308-04 2.0E-05 2.2E-05 2O-Jun-90 1.80E-04 2.0E-05 5.08-08 3.20E-04 2.0E-05 r.0E-06 l7-Oct-90 r.60E-04 2.0E-05 5.0E-08 3.30E-04 2.0E-05 l.0E-06 l0-Apr-91 1.20E-04 2.0E-05 5.0E-06 3.00E-04 2.08-05 l.0E-06 I l-Jun-91 9.10E-05 t.6E-05 2.08-07 1.90E-04 2.0E-0s 2.0F-07 20-Nov-91 4.508-04 4.0E-05 5.08-08 1.09E-03 5.0E-05 1.0E-06 22-Apr-92 3.60E-0s l.0E-05 2.08-06 1.50E-04 2.0E-0s l.0E-05 l0-Jun-92 1.00E-0s 7.08-06 2.0E-07 7.50E-05 2.08-0s l.0E-06 10-Jun-92 7.90E-0s 3.5E-Os 3.0E-06 7.10E-04 7.0E-05 2.0E-0s I I t T t I I I T I I I t I I I T T t WHITE MESA MILL FORAGE RADIONUCLIDE DATA NORTH EAST OF MILL SAMPLED DATE l3-Apr-93 Ra-226 Ra-226 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg 5.0E-08 ** I ,rr"t I ,rt* Pb-210 Pb-210 LLD VALUE ERROR uCilKg uCi/Kg uCi/Kg l.0E-06 2.80E-04 I :.os-osl 2.oE-os 26-Jun-93 3.00E-0s r.5E-05 3.0E-06 4.30E-05 3.58-05 2.0E-05 l2-Oct-93 6.60E-05 2.78-05 3.08-06 5.30E-04 6.0E-05 2.08-05 l1-Mav-94 1.80E-04 4.0E-05 3.0E-05 4.40E-04 6.0E-0s 2.0E-04 l9-Jul-94 l.7lE-0s t.2E-06 9.0E-08 3.00E-05 6.lE-06 4.5E-06 28-Nov-94 2.408-04 l.5E-05 t.7E-07 t.708-04 l.lE-05 8.3E-07 11-Aor-95 6.70E-05 5.4E-06 t.6E-07 1.408-04 1.3E-0s 7.9E-07 06-Jul-95 1.50E-05 l.5E-06 t.5E-07 5.10E-05 4.5E-06 7.6E-07 l5-Nov-95 5.50E-0s 5.0E-06 1.8E-07 6.70E-05 l.0E-05 8.8E-07 23-Apr-96 5.20E-05 2.5F-06 l.5E-07 3.20E-05 4.5E-06 l.8E-07 3 1-Jul-96 ***t ** l4-Nov-96 3.00E-0s 2.58-06 l.8E-07 1.40E-04 7.tE-06 9.3E-07 2l-Aor-97 l. I 0E-05 4.78-07 l.2E-07 4.10E-05 3.6E-06 6.tE-07 05-Sep-97 l.l0E-05 4.3E-07 1.3E-07 2.10E-05 7.38-07 6.7E-07 20-Nov-97 8.00E-06 t.2E-06 5.68-07 1.40E-04 4.68-06 1.lE-07 23-Mar-98 <9.10E-05 9.lE-05 9.lE-05 <4.50E-04 4.58-04 4.5F-04 I6-Jun-98 1.80E-05 L.2E-06 6.3E-08 4.008-0s l.8E-06 3.28-07 05-Nov-98 5.70E-05 t.0E-06 8.28-08 8.70E-05 5.0E-06 4.tE-07 l5-Apr-99 2.008-04 3.0E-06 t.2E-07 3.00E-04 t.0E-05 6.0E-05 07-Jul-99 6.03E-0s t.4E-06 8.3E-08 1.40E-04 4.7E-06 4.28-07 02-Dec-99 2.30E-0s 1.0E-06 2.3E-0'1 2.10E-05 l.0E-06 l.lE-06 2l-Apr-00 t.50E-04 3.0E-06 t.2E-0'l 1.60E-04 8.0E-06 5.9E-07 22-Jun-00 r.20F-06 l.0E-07 2.8E-07 1.60E-04 l.0E-05 t.4E-06 2l-Dec-00 1.60E-06 l.lE-06 3.78-07 5.10E-05 5.0E-06 l.9E-06 30-Aor-01 1.00E-06 r.0E-07 2.4E-07 <1.2E-06 l.0E-07 2.48-07 l4-Jun-01 2.308-06 2.08-07 9.9E-08 3.808-06 2.0F-07 5.08-07 l7-Dec-01 9.108-06 2.48-06 t.2E-07 3.57E-05 3.0E-06 6.0E-07 07-Mav-02 3.30E-0s l.8E-06 7.68-07 4.50E-05 2.68-06 l.0E-05 01-Jtl-02 5.558-0s 2.8E-06 7.68-07 5.31E-0s 3.98-06 l.0E-05 l5-Dec-02 7.758-05 3.6E-06 1.68-07 1.29E-04 6.2E-06 l.0E-0s 2l-Mar-03 9.10E-06 l.3E-06 3.68-07 1.13E-05 l.6E-06 3.48-06 l0-Jun-03 2.508-05 r.3E-06 3.68-07 3.268-06 2.0E-06 7.48-08 20-Nov-03 5.70E-05 3.sE-06 l.5E-07 4.058-05 5.8E-06 8.3E-07 T I I I t t t I I I T I I I I T T I I WHITE MESA MILL FORAGE RADIONUCLIDE DATA NORTH EAST OF MILL SAMPLED DATE Ra-226 Ra-226 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg 5.0E-08 Pb-210 Pb-210 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg 1.08-06 08-Aor-04 9.388-05 3.78-06 1.lE-07 5.88E-05 3.08-06 5.5E-07 l2-Jun-04 5.63E-0s 3.4E-06 t.8E-07 6.42E-0s 5.98-06 9.08-07 30-Nov-04 8.41E-05 5.50E-06 2.00E-08 2.488-04 1.40E-05 3.00E-07 2l-Aor-05 5.60E-05 3.00E-06 1.408-07 5.80E-05 4.00E-06 6.908-07 l3-Jun-05 9.10E-06 1.50E-06 1.80E-07 1.10E-05 1.208-0s 9.00E-07 10-Nov-05 6.00E-05 3.00E-06 l.l0E-10 1.70E-06 6.40E-07 5.50E-10 03-Apr-06 8.00E-0s 5.00E-06 5.00E-08 3.40E-04 1.20E-05 1.00E-06 I6-Jun-06 4.108-0s 3.10E-06 5.00E-08 t.l6E-04 6.10E-06 1.00E-06 28-Nov-06 t.t7E-04 4.608-06 1.90E-07 3.28F-04 9.50E-06 9.50E-07 30-Mar-O7 9.70E-05 4.408-06 1.90E-07 3.408-04 8.70E-06 8.4-O7 l-Jun-07 1.30E-05 1.60E-06 1.90E-07 1.208-04 6.60E-06 9.70E-07 23-Nov-07 7.00E-0s 8.20E-06 2.00E-07 5.00E-04 2.00E-05 1.208-06 22-Apr-08 3.6E-06 3.00E-06 5.208-07 2.38-04 1.40E-05 1.00E-06 I 8-Jun-08 3.2E-05 3.20E-06 1.80E-06 6.9E-05 3.50E-0s 5.50E-05 INTERNATIONAL URANIUM CORP. WHITE MESA MILL FORAGE RADIONUCLIDE DATA NORTH WEST OF MILL SAMPLED DATE Ra-226 Ra-226 LLD VALLIE ERROR uCi/Kg uCi/Kg uCi/Kg 5.0E-08 Pb-210 Pb-210 LLD VALUE ERROR uCi/Kg uCilKg uCi/Kg l.0E-06 27-Aus-81 2.738-03 5.0E-0s 5.0E-08 7.10E-03 3.0E-04 l.0E-06 20-Oct-81 2.008-04 l.0E-05 5.0E-08 8.30E-04 5.0E-0s 1.0E-06 l5-Apr-82 1.04E-04 9.0E-06 7.0E-06 6.408-04 5.0E-05 4.0E-05 0l-Jul-82 2.00E-05 l.0E-05 5.0E-08 2.20E-04 9.0E-05 1.0E-07 30-Nov-82 2.368-06 9.58-07 r.0E-06 8.00E-05 l.0E-05 l.0E-05 l3-Aor-83 8.58E-05 l.4E-05 2.0E-08 3.53E-04 t.9E-05 l.0E-05 01-Jul-83 t.l9E-04 t.lE-05 5.0E-06 1.58E-04 l.3E-05 r.0E-05 3O-Jan-84 9.78E-05 7.08-06 2.08-06 2.168-03 3.48-04 3.0E-04 28-Jun-84 2.088-04 l.0E-05 3.0E-09 r.60E-03 7.0E-0s 3.0E-08 l4-Nov-84 6.05E-04 t.6E-04 2.08-07 2.588-03 t.lE-04 3.0E-08 27-Mar-85 r.l0E-04 8.0E-06 3.0E-06 8.63E-04 4.2E-05 3.0E-0s l5-Jul-85 6.10E-05 6.0E-06 2.08-06 5.408-04 s.0E-05 5.0E-0s 09-Oct-85 1.07E-04 6.0E-06 2.0E-06 3.80E-04 3.0E-0s 2.0E-0s 24-Mar-l6 8.86E-04 l.8E-05 2.0E-06 4.408-03 l.9E-04 3.0E-05 l0-Jul-86 6.668-04 1.8E-05 3.0E-06 4.788-03 2.tE-04 6.0E-05 l8-Dec-86 s.20E-04 t.0E-04 3.0E-06 1.70E-03 l.0E-04 6.0E-0s 20-Aor-87 4.10E-04 r.0E-04 5.0E-08 1.60E-03 l.0E-04 l.0E-06 05-Jun-87 1.60E-04 3.0E-0s s.0E-08 5.50E-04 4.0E-05 l.0E-06 22-Dec-87 3.60E-04 5.0E-05 5.0E-08 1.80E-03 l.0E-04 l.0E-06 l9-Apr-88 2.608-04 5.0E-0s s.0E-08 r.90E-03 l.0E-04 1.0E-06 28-Jul-S8 3.10E-05 t.9E-05 s.0E-08 1.608-04 4.0E-05 l.0E-06 07-Anr-89 6.208-04 5.0E-05 ***r.70E-03 l.0E-04 **x 06-Jun-89 3.408-04 3.0E-0s ***7.408-04 3.0E-0s *{.* 07-Nov-89 5.10E-04 6.0E-05 7.0E-06 1.00E-03 7.0E-05 1.4E-05 l7-Aor-90 3.60E-04 3.0E-05 4.0E-06 4.80E-04 2.0E-05 2.28-05 20-Jun-90 1.708-04 2.0E-05 5.0E-08 3.20E-04 2.0E-0s r.0E-06 l7-Oct-90 8.80E-05 l.6E-05 5.0E-08 2.90E-O4 2.0E-05 r.0E-06 l0-Apr-91 3.008-04 3.08-0s 5.0E-06 4.108-04 2.0E-05 l.0E-06 I 1-Jun-91 3. l0E-04 3.0E-0s 2.0E-07 4.708-04 2.08-05 2.0E-07 20-Nov-91 5.00E-04 4.08-0s 5 oF-OR 1.50E-03 l.0E-04 r.0E-06 22-Aor-92 2.00E-05 8.0E-06 2.08-06 9.60E-05 l.4E-05 l.0E-05 t I t T T I I I I I t I I I I T t I t INTERNATIONAL URANIUM CORP. WHITE MESA MILL FORAGE RADIONUCLIDE DATA NORTH WEST OF MILL l0-Jun-92 6.50E-06 6.08-06 2.0E-06 t.208-04 2.08-05 1.0E-06 l0-Jun-92 1.208-04 4.0E-05 3.0E-06 t.2tE-03 8.08-05 2.0E-0s l3-Aor-93 1.80E-05 r.7E-05 3.08-06 2.108-04 3.0E-05 2.08-05 26-Jun-93 5.20E-0s r.9E-05 3.0E-06 1.70E-05 3.6E-05 2.0E-05 l2-Oct-93 5. l0E-05 2.3E-0s 3.08-06 7.l0E-04 6.0E-0s 2.0E-05 I l-Mav-94 t.20E-04 l.0E-0s 3.0E-05 9.80E-04 l.6E-04 2.08-04 l9-Jul-94 3.73F-05 l.6E-06 8.4E-08 7.80E-05 7.tE-06 4.28-07 28-Nov-94 2.40E-04 l.sE-05 I.7E-07 2.608-04 l.3E-05 8.3E-07 I l-Apr-95 8.408-05 6. lE-06 1.5E-07 1.208-04 l.1E-05 7.5E-05 06-Jul-95 1.90E-0s r.5E-06 t.4E-07 4.508-05 4.38-06 7.2E-07 l5-Nov-95 1.208-04 6.8E-06 t.4E-O7 L008-05 5.8E-06 7.tE-07 23-Aor-96 8.308-05 3.3E-06 l.9E-07 6.80E-0s 6.3E-06 l.8E-07 3 l-Jul-96 ***,r ** l4-Nov-96 3.608-0s 2.58-06 I.6E-07 8.508-05 s.6E-06 8.4E-07 2l-Aor-97 3.30E-05 2.38-06 t.7E-07 4.40E-05 4.8E-06 8.48-07 05-Seo-97 5.40E-06 3.5E-07 t.6E-07 3.20E-05 9.08-07 7.8E-07 20-Nov-97 8.90E-06 7.2E-07 5.48-07 3.408-04 6.7E-06 l.lE-07 23-Mar98 <9.20E-05 9.28-05 9.2E-0s <4.608-04 4.68-04 4.68-04 l6-Jun-98 < 6.50E-08 6.5E-08 6.58-08 <3.208-07 3.2E-07 3.2E.07 05-Nov-98 4.20E-0s l.0E-06 t.lE-07 1.708-04 l.0E-05 5.5E-07 l5-Aor-99 6.20E-0s t.0E-06 1.0E-07 1.408-04 7.0E-06 l.0E-07 07-Jul-99 5.45E-0s l.4E-06 8.3E-08 9.20E-05 4.0E-06 4.28-07 02-Dec-99 1.108-04 3.0E-06 2.2E-07 2.80E-05 r.0E-06 1.1E-06 21-Aor-00 3.70E-05 l.0E-06 2.4F-07 2.70E-04 l.0E-05 t.2E-06 22-Jtn-00 2.908-05 l.0E-06 33E-07 2.80E-04 2.0E-05 r.7E-06 2l-Dec-00 2.30E-06 r.4E-06 3.78-07 3.30E-04 5.0E-05 l.9E-06 30-Aor-01 2.10E-0s l.0E-06 l.5E-07 <7.68-07 N/A 7.6E-07 l4-Jun-01 1.30E-06 4.0E-08 r.2E-07 L80E-06 3.0E-08 5.98-07 l7-Dec-01 3.70E-05 1.678-07 8.30E-08 6.728-05 2.62E-06 6.00E-07 7-Mav-02 4.90E-05 2.408-06 7.60E-07 1.288-04 5.618-06 1.00E-0s 7-td-02 8.88E-os 4.32F-06 7.60E-07 8.33E-0s 4.328-06 1.00E-05 l5-Dec-02 1.50E-04 6.2E-06 7.60F-07 3.168-04 1.078-05 r.0E-05 2l-Mar-03 s.00E-05 3.4E-06 2.71E-06 <4.2e-6 4.20E-06 l0-Jun-03 5.60E-0s 2.08-06 4.108-07 1.88E-04 5.14E-06 8.2E-08 20-Nov-03 3.20E-04 8.2E-06 1.708-A7 4.89E-04 1.25E-05 8.3E-O7 8-Apr-04 6.29E-05 4.18-06 2.008-07 1.94E-0s 4.00E-06 l.0E-06 I I I I t I I I I I I T I I T I I T I INTERNATIONAL URANIUM CORP. WHITE MESAMILL FORAGE RADIONUCLIDE DATA NORTH WEST OF MILL l2-Jun-04 6.51E-05 3.4E-06 1.308-07 1.87E-0s 3.90E-06 6.5E-07 30-Nov-04 7.50E-05 4.6E-06 2.08-08 4.458-04 1.40E-0s 3.0E-07 2l-Aor-05 4.90E-0s 2.708-06 1.30E-07 1.278-04 4.808-06 6.50E-07 l3-Jun-05 2.30E-0s 2.10E-06 1.50E-07 4.70E-05 5.108-06 7.60E-07 l0-Nov-05 7.40E-05 3.50E-06 1.20E-10 2.40E-06 8.10E-08 5.80E-10 5-Apr-O6 1.00E-04 6.008-06 s.00E-08 6.548-04 r.50E-05 1.00E-06 l6-Jun-06 9.50E-05 5.90E-06 s.00E-08 4.488-04 1.40E-05 r.00E-06 28-Nov-06 8.13E-0s 4.10E-06 2.208-07 3.258-04 1.12E-06 1.00E-0s 30-Mar-07 4.30E-05 2.608-06 1.708-07 2.64E-04 7.208-06 8.60E-07 l-Jun-07 5.10E-05 3.20E-06 2.308-07 5.30E-04 1.40E-06 1.20E-06 20-N0v-07 7.30E-0s 6.6E-06 s.0E-08 7.00E-04 2.20E-05 l.l0E-06 22-Apr-08 2.8E-06 2.8E-06 7.208-07 4.408-04 2.0E-05 l.0E-06 I I I I T T T I I I T I I t I I T I I WHITE MESAMILL FORAGE RADIONUCLIDE DATA SOUTH WEST OF MILL SAMPLED DATE Ra-226 Ra-226 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg 5.0E-08 Pb-210 Pb-210 LLD VALUE ERROR uCi/Kg uCi/Kg uCi/Kg l.0E-06 27-Aus-81 9.50E-04 2.0E-05 s.0E-08 1.50E-04 l.0E-05 l.0E-06 2l-Oct-S1 3.00E-05 3.08-06 5.0E-08 1.508-04 2.0E-05 l.0E-06 l5-Aor-82 1.37E-0s 3.0E-06 3.0E-06 3.80E-04 4.08-05 4.0E-05 0l-Jul-82 3.40E-04 2.0E-05 5.08-08 3.68E-03 2.7E-04 t.0E-07 30-Nov-82 1.75E-05 3.0E-06 2.0E-06 7.92F-04 4.0E-06 2.0E-0s 14-Aor-83 7.138-04 7.3E-0s 9.0E-08 2.51E-03 3.0E-04 3.0E-04 01-Jul-S3 5.398-05 4.5E-06 2.08-06 6.88E-04 4.3E-05 4.0E-0s 30-Jan-84 6.40E-05 7.08-06 4.0E-06 1.20E-03 l.0E-04 4.0E-05 28-Jun-84 8.27E-05 6.3E-06 3.0E-09 1.808-03 l.0E-04 9.0E-08 14-Nov-84 2.728-04 l.5E-04 2.0F-07 4.708-03 7.2F-04 3.0E-07 27-Mar-85 4.738-04 t.6E-07 3.0E-06 7.078-04 3.6E-05 3.0E-05 I 5-Jul-85 6.60E-05 7.0E-06 4.08-06 4.90E-04 3.0E-0s 3.08-05 09-Oct-85 2.83E-O4 2.0E-05 7.0E-06 1.50E-03 l.0E-04 7.0E-05 24-Mar-86 1.578-04 t.0E-0s 4.08-06 4.14E-03 l.8E-04 3.0E-05 l0-Jul-86 3.788-04 1.08-0s 2.0E-06 l.6sE-02 7.0E-04 1.0E-04 18-Dec-86 2.60F-04 2.0E-05 2.0F-06 1.70E-03 l.0E-04 .0E-04 20-Apr-87 4.10E-04 7.0E-05 5.08-08 2.20E-03 l.0E-04 .0E-06 05-Jun-87 2.90E-O4 4.0E-0s 5.0E-08 7.50E-04 5.08-05 .0E-06 22-Dec-87 1.80E-04 3.0E-05 5.0E-08 2.408-03 l.0E-04 0E-06 19-Aor-88 2.30E-04 5.0E-05 5.0E-08 2.908-03 l.0E-04 0E-06 28-Jul-88 1.50E-04 3.0E-0s 5.0E-08 4.30E-03 2.0F-04 1.0E-06 07-Aor-89 3. l0E-04 4.0E-05 ***4.208-03 1.0E-04 ,.* * 06-Jun-89 1.30E-04 2.0E-05 ***1.50E-03 l.0E-04 x*{< 07-Nov-89 4.30E-04 5.0E-0s l.4E-05 3.50E-03 t.4E-O4 2.7E-0s 28-Mar-90 2.508-04 3.08-0s s.0E-06 2.398-03 5.0E-05 2.5E-05 l3-Jun-90 l.l0E-04 2.0E-05 5.0E-08 6.60E-04 3.0E-0s t.0E-06 23-Oct-90 6. l0E-05 t.4E-0s s.0E-08 6.10E-04 3.08-05 l.0E-06 l0-Apr-91 3.40E-0s l.lE-05 s.0E-06 2.208-04 l.0E-05 1.0E-06 I l-Jun-91 8.008-0s 6.0E-06 2.08-07 t.20E-04 l.0E-05 2.0E-07 20-Nov-91 6.508-05 1.48-0s 5.0E-08 9.108-04 s.0E-05 1.0E-06 22-Apr-92 1.60E-0s 7.0E-06 2.0E-06 3.208-04 2.0E-0s l.0E-05 lO-Jun-92 1.90E-05 r.0E-05 2.0E-07 2.20F-04 2.0E-05 1.0E-06 I I I I T I I I I I t T T I I t I I t 08-Dec-92 1.60E-05 l.8E-05 3.0E-06 7.608-04 6.0E-05 2.0E-05 l3-Apr-93 2.60E-05 2.0E-05 3.0E-06 3.40E-04 3.0E-05 2.0E-05 27-lun-93 3.00E-05 l.4E-05 3.0E-06 0.00E+00 3.0E-05 2.0E-05 27-Oct-93 3.108-0s 1.6E-05 3.0E-06 4.208-04 6.0E-0s 2.0E-0s 0l-Mav-94 2.00E-05 5.0E-06 3.08-05 3.90E-04 8.0E-05 2.0E-04 t9-Jul-94 1.75E-05 t.7E-06 7.6E-08 1.308-04 7.8E-06 3.8E-07 l6-Nov-94 1.00E-04 9.0E-06 l.5E-07 2.608-04 r.2E-05 1.48-07 05-Apr-95 1.708-0s l.5E-06 1.6E-07 1.608-04 l.5E-05 8.lE-07 07-Jul-95 6.40E-06 6.08-07 r.4E-07 4.40E-05 4.28-06 7.0F-07 09-Nov-95 2.30E-05 2.28-06 t.7E-07 6.60E-0s 9.6E-06 8.3E-07 24-Aor-96 4.208-05 2.28-06 t.7E-07 1.008-04 6.78-06 1.88-07 3 l-Jul-96 ****** l4-Nov-96 2.10E-05 2.08-06 t.6E-07 1.90E-04 7.38-06 8.28-07 2l-Aor-97 s.50E-06 4.28-07 t.4E-07 3.30E-05 3.9E-06 7.0E-07 05-Sep-97 5.30E-06 3.28-07 l.3E-07 1.90E-05 6.9E-07 6.3F-07 20-Nov-97 2.50E-0s 9.5E-07 5.98-07 1.30E-04 4.7E-06 t.2E-07 26-Mar-98 <7.90E-05 7.9E-05 7.9E-0s <3.90E-04 3.98-04 3.9E-04 l6-Jun-98 3.60E-07 t.4E-07 3.3E-08 <1.78-07 t.7E-07 t.7E-07 09-Nov-98 4.308-0s 1.0E-06 7.68-08 2.508-04 l.0E-05 3.8E-07 l5-Anr-99 2.408-0s l.0E-06 t.2E-07 1.708-04 8.0E-06 6.28-07 07-Jul-99 2.238-05 8.6E-07 t.2E-07 2.308-04 7.0E-06 5.9E-07 07-Dec-99 1.50E-04 3.0E-06 2.08-07 1.70E-05 l.0E-06 r.0E-06 2l-Aor-00 1.00E-04 2.08-06 t.2E-07 l.l0E-04 7.0E-06 6.rE-07 22-Jtn-00 1.30E-06 l.0E-07 2.48-07 2.00E-04 l.0E-05 t.2E-06 2l-Dec-00 1.20E-06 9.08-01 2.48-07 1.208-04 3.08-05 l.2E-06 30-Apr-01 L80E-06 l.0E-07 t.7E-07 <8.3E-07 N/A 8.3E-07 l4-Jun-01 2.60E-O6 2.08-07 9.9E-08 t.l0E-06 2.0E-08 5.0E-07 l7-Dec-01 2.638-06 4.6E-05 r.2E-07 9.40E-0s 3.7E-06 6.0E-07 07-Mav-02 3.s0E-05 2.28-06 7.68-07 1.36E-04 5.6E-06 l.0E-05 07-Jul-02 4.028-0s 2.38-06 7.68-07 7.048-05 4.lE-06 l.0E-05 l5-Dec-02 8.10E-05 3.9E-06 7.6E-07 2.87E-04 8.5E-06 l.0E-05 2l-Mar-03 3.70E-0s 2.68-06 2.48-06 2.698-05 2.0E-06 3.7E-06 l0-Jun-03 1.30E-0s 1.0E-06 5.2F-07 <1.00E-07 1.0E-07 20-Nov-03 1.60E-04 l.3E-05 t.2E-07 1.428-04 6.48-06 s.9E-07 08-Aor-04 1.40E-04 7.78-06 l.lE-07 6.10E-06 2.78-06 5.5E-07 l2-Jun-04 6.51E-05 3.28-06 l.5E-07 s.278-05 4.98-06 7.68-07 30-Nov-04 8.40E-05 5.7E-06 3.08-08 3.398-04 l.6E-05 3.0E-07 2l-Apr-05 1.70E-05 1.68-06 l.3E-07 4.50E-0s 3.sE-06 6.5E-07 l3-Jun-05 r.50E-05 t.6E-06 r.4E-O7 7.00E-05 5.lE-06 6.98-07 l0-Nov-05 3.808-05 2.tE-06 8.6E-10 1.20E-06 4.8E-08 4.3E-10 03-Apr-06 1.00E-04 6.0E-06 5.0E-08 3.30E-04 I.lE-05 l.0E-06 T t T I I I I t I I I I I t t I T I I 22-Apr-08 I 8-Jun-08 3.208-05 1.2sE-05 2.30E-06 2.208-06 7.208-07 1.808-06 2.30F-04 5.00E-05 1.s0E-05 3.00E-05 1.00E-06 4.808-03 l6-Jun-06 3.40E-05 2.58-06 5.08-08 1.37E-04 6.0E-06 l.0E-06 28-Nov-06 7.31E-05 3.208-06 1.60E-07 2.988-04 8.50E-06 8.208-07 30-Mar-07 3.00E-05 2.208-06 1.708-01 3.208-04 790E-06 8.40E-07 l-Jun-07 1.10E-04 4.608-06 2.3-07 3.20E-04 1.10E-05 l.l0E-06 l9-Nov-07 5.60E-0s s.20E-06 5.00E-08 6.408-04 1.90E-0s 1.00E-06 I ENERGY LAAOBATORIEA NC. , 2393 Salt Creek Highway (82601) , PO, Box 3258 Toll Free 888.235.05 I 5 . 302' 05 I 5' Fax 307.234. I 639, casper@energylab.q . Casper, WY82602 wu,w.eoergylahcom I I I Client: Project: Lab lD: Client Sample lD: LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp Early Spring Vegetation c08041 165.002 Nlortheast Report Date: Collection Date: DateReceived: Matrix: 06i/08108 4412210814:05 a4125t08 Vegetation I Result Units Qualifiers RL MCUQCL Method Analysls Date I By uCi/kg uCi/kg uCi/kg uCi/kg uCi/kg t I I I I t I T I I I RADIONUCLIDES . TOTAL Lead 210 Lead 210 pl8cision (t) Radium 226 Radium 226 precision (t) Radium 226 MDC 2.3E-04 1.4E-05 1,2E-44 3,6E-06 5.2E47 1.0E-06 ES09.0M E909.0M E903.0 Es03,0 E903.0 05/1 9/08 07:1 5 / dm 051'1 9108 07:15 / dm 05116108 11 :45 / trs 05116108 11:45/trs 05/16/08 11:45/ks I t I Report RL - Analyte reporting limit. Befinitions: eCL - euality control limit. MDC - Mlnimum detectable concentratlon MCL - Maximum contaminant level. ND - Not detected at tha reporting limit. t ENEBGY LAEORATOBIES, tNC. '2393 Satt Creek HEhway (8260t) ' P.O. Box 3?58 ' Caspq WY82602 TollFree888.235.05l5 . 302 0515 ' Fax 307.234.1639 , casper@energylab.Q Wwttenergylab.com I I I Client: Project: Lab lD: Client Sample lD; LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp Early Spring Vegetation c08041 165-003 Norhlwest Report Date: 06/08/08 Collection DalB; A4122108 12:52 DateReceived: A4l25lAB Matrix: Vegetation I Result Units Qualifiers RL MCUQCL Method Analysis Date / By uCilkg uCilkg uCUkg uCilkg uCi/kg I t I t I t I I I t I RADIONUCLIDES. TOTAL Lead 210 Lead 210 precision (t) Radium 226 Radium 226 precision (*) Radium 226 MDC 4.48 04 2.0E-05 4.9E-05 2.88-06 7.2E-07 1.08-06 ES09.0M E90S.0M E903.0 E903.0 E903.0 05119/08 07;15 / dm 05/19/08 07:15 I dm 05/1 6108 1 1:45 / trs 05116/08 11r45/trs 05/16i08 11:45ltrs T I I Report RL -Analyte reporting llmlt, Deflnitlons: eCL, euality control limit. MDC - Minimum detectable concentration MCL - Maximum eontaminant level. ND - Not detected at the reporting timit. I ENEEGY LABORATORTEi lNC. , 2393 Salt Creek Hlghway (52601) ' PO. Box 3?58 ' Caspet W82602 ruFiii'aaa.zss.osti : szzi''.0st5 . Fax 307.234.1639 ,-cisper@energylab.( wwu.energytab.com I I t Client: Project: Lab lD: Client Sample ID: LABORATORY ANALYTIGAL REPORT Denison Mines (USA) CorP Early Spring Vegetation c08041 165-001 Southwest Report Date: 06/08/08 Collection Date: 04122108 1 0:35 DateReceived: 04125/08 Matrix Vegetation Result Unils Qualiflers RL MCUQGL Method Analysis Date I ByI uCi/kg uCi/kg uCilkg uCi/kg uCi/kg I I I T I I I I I T I RADIONUCLIDES . TOTAL Lead 21 0 Lead 210 precision (i) Radium 226 Radium 226 precision (t) Radium 226 MDC 2.38-04 1.sE-05 3.2E-05 2.38-06 7.2E-07 1.0E-06 E909.0M E909.0M ES03.0 E903.0 E903.0 05/19108 07:15 / dm 05/19/08 07:15 / dm 05/16/08 11:45ltrs 05/16108 11:45 I trs 05/16/08 11:45/trs I I I Report RL - Analyte reporting limit. DeflniUons: eCL. euality control ;imit. MDG - Minlmum detectabte concentration MCL - Maxlmum contaminant level. ND - Not detected at the reporting limit. I ENEFGY UBOnATOPIES, lNC. . 2393 Salt Creek Highway (82601) , P.O. gox 3258 , Casper, WY 82602 TollFree888.235.0515 , 307.235.0515 , Fax 307.234,1639 ' caspet@energylab.com'www:energylab.com I I T Client: Project: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp Late Spring Vegetation c08061062-002 Northeast Report Date: 08/1 3/08 Collection Date: 06/18/08 08:41 DateReceived: 05/23/08 Matrix: Vegetation R€sult Units Qualifiers RL MCU QCL Method Analysis Date I By uCi/kg uCi/kg uCi/kg uCi/kg uCi/kg uCi/kg I I T I T I I T I I I I RADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (t) Lead 210 MDC Radium 226 Radium 226 precision (t) Radium 226 MDC 6.9E-05 3.5E-05 s.5E-05 3.2E-05 3.3E-06 1.8E-06 E909.0M E909.0M E909.0M E903.0 E903.0 8903.0 07115/08 09:30 / dm 07/16/08 09:30 / dm 07116108 09:30 / dm 07l16nB 13:32 i dmf 07/16/0E 13:32ldmf 07116108 13:32 / dmf I I I Report RL - Analyte reporting limit. Definitions: eCL - euality control limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit. I ENEFGY TIBOBATOEEA lNC. ' 2393 Salt Creek HEhway (82601) 'PO. Box 3258 ' Casper WY 82602 Toll Free 088.235.0515 ' 307.235.0515 ' Fax 307.234.1639 ' casper@energylab.com 'www.energylab.com I I I Client: Project: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp Late Spring Vegetation c08061062-003 Northwest Report Date: 0E/13/0E Collection Date: 06/18108 08:20 DateReceived: 06/23108 Matrix: Vegetation Analyses Result Units Qualifiers RL MCUQCL Method Analysls Date / By I I I I I I I t I I t I RADIONUCLIDES. TOTAL Lead 210 Lead 210 precision (t) Lead 210 MDC Radium 226 Radium 226 preeision (t) Radium 226 MDC 1.3E-04 uCilkg 4.1E-05 uCi/kg 6.3E-05 uCilkg 2.1E{5 uCi/kg 3.2E-06 uCi/kg 2.2E-06 uCi/kg E909.0M E909.0M E909.0M E903.0 E903.0 E903,0 07116108 09:30 / dm A7t16108 09:30 / dm 07i16/08 09:30 / dm 07/16/08 15:34 / dmf 0711610815:34 / dmf 07/16/08 15:34 / dmf t I I Report RL - Analyte reporting limit.Definitions: eCL - euality controt limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit. I ENEROY LABORATORIES, tNC. . 2393 Sat Creek Highway (s2601) ' P.O. 1ox 3258 ' caspet wY 82602 Toll Free 888.235.0515 , 307.235.0515 ' Fax 307.2A.1639 ' casper@energylab.con ' www.energyao.com I t I Client: Project: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) CorP Late Spring Vegetation c08061062-001 Southwest Report Date: 08/13/08 Collection Date: 06/18/08 09:14 DateReceived: 06/23108 Matrix: Vegetation Result Units Quallflere RL MCUOCL Method Analysis Oate, By uCi/kg uCi/kg uCi/kg uCi/kg uCi/kg uCi/kg I t I t I I I I I I I I RADIONUCLIDES . TOTAL Lead 210 Lead 210 precision (t) Lead 210 MDC Radium 226 Radium 226 precision (t) Radium 226 MDC 5.0E-05 3.0E-05 4.8E-05 1.2E-O5 2.2E-06 1.8E-06 E909.0M E909,0M E909.0M E903.0 E903.0 E903.0 07/16/08 09:30 / dm 07/16/08 09:30 / dm 07/16/08 09:30 / dm 07/16/08 13:32 / dmf 07116108 13:32 / dmf 07116108 13:32 / dmf t T t Report RL - Analyte reporting limit. Oeflnitlons: eCL - euality control limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit I T I I ffiffi/ ENER?Y LABoRAToRtEs,lNc. * 2ggg satt creek Hwy (s2601) . po Box s*ir " casper, wy g2602 frfrififfiffi Toll Free 888.235.0515.307.235.0515 * FAX 307.234.1639 * casper@energylab.com * www.energylab.com LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp Quarterly Radionuclide c08040233-001 Client Sample ID 5046 Filter and Beaker Gllent: Prolect: !-ab lD: Report Date: 05/14108 Collectlon Dale:. 03127 108 DateRecelved= 04102108 Matrlx: Air I Result Unlts Qualitler RL MCU QCL Method Anal!6ls Date / By 0.2 1.0 0.2 -9.4 4.2 6.3 1.7 0.7 0.9 1.4 t I T I I I I I I T t TRACE METALS . DISSOLVED Uranium, Activity RADIONUCLIDES. TOTAL Lead 210 Lead 210 precision (t) Thorium 230 Thorium 230 precision (t) Radium 226 Radium 226 precision (t) Radium 226 MDC 4770 pCi/Filter pCi/Filter pCi/Filter pCi/Filter pCi/Filter pCi/Filter pOi/Filter p0i/Fitter sw6020 E909.0M E909.0M E907.0 E907.0 E903.0 E903.0 E903.0 04127108 20:54 /ts 04/16/08 11:30/dm 04/16/08 11:30/dm 04l14l0g 10:30 / dmf 04114108 10:30 / dmf 04E4lO8 12:37 ltrs 04f24108 12:37 ltrs 04124108 12:37 ltrs I I I Report Dellnltlons: RL - Analyte reporting limit. QCL - Quality control limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit. U - Not detected at minimum detectable concentration I I I I ryffi7tz@@ GIient: Proiect: Lab lD: Cllent Sample lD 5047 Filter and Beaker ENERGY LABORATORIES, tNC. . 2399 Salt Creek Hwy (82601) * PO Box 3258 n Casper, WY 826CI2 Toll Free 888.235.0515 " 307.235.05'15 * FAX 307.234.1639 . casper@energylab.com * www.energylab.com LABORATORY ANALYTICAL REPORT Denison Mines (USA) Corp Quarterly Radionuclide c08040233-002 Report Date: 05/14/08 Collectlon Dale: 03127 108 DateRecelved: 04102108 Matrlx: Air I Analyses Result Unlts Qualilier RL MCU OCL Method Anallals Date / By I I I I t I I I I I I TRACE METALS . DISSOLVED Uranium, Activity RADIONUCLIDES. TOTAL Lead 210 Lead 210 precision (t) Thorium 230 Thorium 230 precision (t) Radium 226 Radium 226 precision (t) Radium 226MDC 4190 pCi/Filter pCi/Filter pCi/Filter pCi/Filter pCi/Filter pCi/Filter pCi/Filter pCi/Filter 0.2 1.0 0.2 sw6020 E909.0M E909.0M E907.0 E907.0 E90S.0 E903.0 E903.0 04127108 2'l:15 /ts 04n6108 11:30/dm 04/16/08 11:30/dm 0411410810:30 / dmf 04114108 10:30 / dmf 04124108 14:07 llts 04124108 14:07 ltrs 04l24lOB 14:O7 I trs 0.0 4.8 6.1 1.5 0.2 0.8 1.4 I T I Report Delinltlons: RL - Analyle reporting limit. QCL - Quality control limit. MDC - Minimurn detectable concentration MCL - Maximum contaminant level. ND - Not detected at the reporting limit. U - Not detected at minimum detectable concentration %r^ -/o %o^ % rIuloq o I IJJoq o)OI trJoq I\ot UJOq (ooIIUoqr rOoItuoq oco-GL*atro(,coo op o =c .9tt^.!7trs Eq>_76o .2o Joobot,oo]tro+.oo I I I I I I I I I I I I T t I t I t I t%,. '.$t/g q2aa %'"@oIuJoqr (clscA 6o1) ilr ilt illrltlttItttttt ltttilttiltl ilttiltlilttiltt Ill lI tlttlltlt llr I illlilttilll il| llltilltlI t Ill ItIlltltlttrttlttttttt ilr ill iltillilrIl Utlll o ItItill ill illtltIt lltiltilt illiltItillilt tlt iltiltil tt lt tl ilil U lt [il rilil rUtt IiltltilttllI t trorrilttIillttilll l iltlr Ittt illtliltllilltI illtrilltrilttI Itr Iillt Iiltttiltttilil I ilil 1 illtrilil tilttI II r iltl I iltl I rO ttl IOrtttl I I I I I o It I iltlr Ilil t l llil r t r[il t tiiiili iltlI IrOrrilttI I illtt I itiltIilttltIttt IIttt Inttt I i'# t ii?i irltr rIr I IItl IItt I iliti iiiiio ia: lil t r IiltrltIil t t Iilttt Iiltrr tiltll Iilttt Iilltt I ililiiilttt Ililii lltl Irrrrf r ilr0ttt I Ii), ' Itt Ii$r|tt I l.l iii ll3 Bi iltrt) a a a iltr r Ittrilil III r ilil t iltllilttlrrl r [ltl Uttt iltttlil l IilrII Itl I Itl Iiltllilttt ilil t illtr iltttillttlttl I iltl I iltlIuttI ilttt iltt Irlrrtlll I ltlt I IltIiltlt ilIII ilttliltll ltlt I lr rr r lilrr{lttt I-Irrrr r r< tltttl lltl lttlttiltltliltIrillIttttllrtttltliltttlltt Pri ; i ? t t II I! I II I I ? II t { II I I IIi I I! I I I It I I II I I ? t I ot I I Ita Io I I I I I It I I I I I ilt I Itt ilttiltliltl llll Itt illlilltiltl iltt UttiltlltttItll Ittt ilttt lil l l[tttilttliltrr iltr I iltllItltillttlI rl ilttl ilrllltrrl ltlll [lrl lil t l[tt Ilttt I [tt IIrr r tt,!t IilttlItrrr tilltlIrtr r r tt Ittttttttltttttttrtlttlttltt tlrtrtllr ItItulillilliltilt lil lilItlil I ilt ilr iltItlil lilntllt %E] 'r"ro. lil l+llfl'%ut/c\ t/,g t%^ t-o-, t/B "% bo- "% %* t%. t-<^ ,a6 %u* P qb, 8? : =E o =oco E troocooop o =tr .9!,Gt !,ot,co CLo =o .Yoo ot,oo3tro o(J o)oIuJoq ooI IJJoqr (e1rc5 0o1) t\oIUJoq @oI UJoe- rO a O II I I o tt ) i( o o I It I I I ,I I I Ia I I a I I ? I ? I I II I I II II I I It I I!I I II II I I I II ? I III IT a I a a ENERGY LABOHATORIES.. tNe. ' 2393 Salt Creek Hrghway (52il1) ' PO, 1ox 3?58 ' Caspei WY 82602 TotlFree888,235.05l5 , 304 0515 ' Fax 307.234.1639 ' caspet@energylab.q' wwwtenetgyao'com Client: Project: Lab lD: Client Sample lD LABORATORY ANALYTICA L REPORT Denison Mines (USA) CorP 1st Quarter Surface Water c08031200-001 Cottonwood Creek Report Dater 04/25108 Collection Da!'e':, A3D7l08 08:09 DateReceived: 03X28/08 Matrix: Aqueous Result Units Qualifiers RL MCUQCL Method Analysis Date / By I I t T I T I I I I I I I PHYSICAL PROPERTIES Sollds, Total Dissolved TDs @ 180 C Solids, Total Suspended TSS @ 105 C 411 54 10 ,| mglL mg/L A2540C 0410210815:50/dd 42540 D 04/01108 08:31 / dd I I I t I I Report Definitions: RL - Analyte reporting limit. QCL - Quatity control limit. MCL - Maximum contaminant level. ND - Not detected at the reporting limit, I ENEfrGY LAAORATOBTEA INC. ' 2393 Satt Creek Hrghwav (8260U 'PO. Box 3258 ' Caspet ryY82602 TottFree888.235-05t5 , 30( "q.0515 . Fax 302234.1609 . casper@energylab.( 'www:energytaD.com I I I Client: Project: Lab lD: Client Sample lD LABORATORY ANALYTICAL REPORT Denison Mines (USA) CorP 2nd Quarter SemFAnnual Surface Water c08050705-001 Cottonwood Creek Report Date: 06/20/08 Collection Date: 05/13/08 08:30 DateReceived: 05/'15108 Matrix: Aqueous Analyses Result Units Qualifiers RL MCUQCL Method Analysis Date I By 0.2 473 mg/L8 mg/L I I I I I I I I I T I t PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C Solids, Total Susponded TSS @ 105 C METALS - DISSOLVED Uranium METALS - SUSPENDED Uranium RADIONUCLIDES . DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (t) Radium 226 Radium 226 precision (t) Radium 226 MDC Thorium 230 Thorium 230 precision (t) RADIONUCLIDES . SUSPENDED Radium 226 Radium 226 precision (t) Radium 226 MDC Thorium 230 Thorium 230 precision (t) 10 1 0.0003 0.0003 1.0 E200.8 E200.8 E900.1 E900.1 E903.0 E903"0 E90s.0 E907.0 E907.0 E903.0 E903,0 E903.0 E907.0 E907.0 A2540 C 05116108 15:14 I dd A2540 D aSnTBA 10:21 /sp 0-0136 mg/L 0.0003 mg/L 2.6 pCi/L 0.6 pCi/L 0.1 pCi/L 0.1 pCi/L 0.2 pCi/L 0.1 pCi/L o.2 pClil -0.8 pCilL 0.9 pCi/L 1.7 pCi/L 0.9 pCi/L 0.9 pCi/L 05/30/08 22:39 / ts OS|?TEA 21:38 / sml 05129/08 22:55 I cM 05/23108 22'.55 I crw 05t29t08 1424 I bj 05/29108 14i24 I |oii 05129108 14:20 I tai 06/02/08 15:00 / dmf 06/02/08 15:00 / dmf 06/02/08 2'l:.44 t laj 06102/08 21'.44ltai 06/02/08 21:44 I lai 05i23/08 10:30 / dmf 05/23/08 10:30 / dmf I I I Report RL - Analyte reporting limit, Oefinitions: eCL - euality control limit. MDC - Minimum detectable concentration MCL - Maximum contaminant level" ND - Not detected at the reporting limit. U - Not detected at minimum detectable concenllation ENEBGY LAEORATABES. lNC. .2393 Satt Creek Highway (s260t)'P.O. !o1$258 ' Caspil W-Y826U loltFree888.235.05l5 . 307 -0515 ' Fax 307.234.1639 ' casPer@enetgylab.{ 'www.energyaD'com ANALYTICAL SUMMARY REPORT April25, 2008 Denison Mines (USA) CorP 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C08031200 Project Name: 1st Quarter Surface Water Energy Laboratories, lnc. received the following 1 sampte from Denison Mines (USA) Corp on 3/28n0OB for analysis' Sample lD Client Sample lD Collect Date Receive Date Matrix C08031 200-001 Cottonwood Creek 03127 108 08:09 03/28/08 Aqueous Solids, Total Dissolved Solids, Total SusPended I I I I I I t t I I I t I I I I I t I As appropriate, any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the OA/OC Summary Report, orthe Case Nanative' lf you have any questions regarding these tests results, please call. Report Approved av r,,&4'o €-4.--* I I ENERGY LABOBATORTES, lNC. . 2393 Satt Creek Highway (A601) ' P0. Box 3218 ' Casper WY 826A2 Totl Free888.235.0515 . 30Zi' 1515 . Fax 307.234.1639 ' casper@meryylab.c1 www.energytaa.com QA/QC Summary Report Cliont: Project: Denison Mines (USA) Corp 1st Quarter Surface Water Report Date: M/25/08 Work Order: C08031200 RL %REC Low Limit High Llmit Batch: 080402-1-SLDS-TDS-W Run: BAL-1-0804028 04/02/08 10;00 IRPD RPDLimit Qual iAnalyte Method: A2540 C SamplelD: MBLK1-080402 Solids, Total Dissolved TDS @ 180 C SamplelD: LCSl-080,102 Solids, Total Dissolved TDS @ 180 C Sample lD: C08031200-001AMS Solids, Total Dissolved TDS @ 180 C Samplo lD: C08031200-001AMSD Solids, Total Dissotued TDS @ 180 C Result Units Method Btank ND mgll Laboratory Control SamPle 994 mg/L Sample Matrix Spike 2430 mg/L Sample Matrix Spike Duplicate 2390 mg/L 101 99 10 '10 Run: BAL-1-080402890 110 Run: BAL-1_0804028 90 110 Run: BAL-1-0804028 90 1 10 1.7 04/02/08 10:00 04102/08 15:51 c/.l02l08 15151 10 I I I I I I T I I I I I I t I I I Method: 425,10 D Sample lD: MBLK1-080401A Solids, Total Suspended TSS @ 105 C Sample lD: C08031200-001ADUP Sotids, Total Suspended TSS @ 105 C Method Blank ND mg/L Sample Duplicate 4tL0 mgll Run: BAL-1-080401C Run: BAL-1 080401C Batch: 080401A-SLDS-TSS"W 04/0I/08 08:31 04/01108 08:32 12 25 Qualifiers: RL - Analyte reporiing limit.ND - Not detected at the reporting limit. dIU od) ET0, .9obGE0r.ooi-Y-c 9.4 E" Io= E:fiEo-E(! lDEgEc -bE-G q, SEE6: (, Eo ob l.Efro o EE€E A'trl EE 8s.alF LL -sreoeEoQ!sc?= ofr:E5H bE3 boiJ=€ s.= nEso? x>.o.=tr 5.=q:E9< (E ,ig.9 .g= F i8qPeO3: S. AEP0ro:Ei q) sPSB8iSu -'=oPE> (U 3 H.en!! *o i.F IF= 88t'l *E'6 ag '6 tr 6t 4ro n o -+ oo)([ 0- oi15EL.oo*fJxo:E,i,yPAE9PJE6HOEtr5 -:(E:oer- -Yta., E -DgG# LO<il 1'EF.FL(E(gEo>ET'6o;U-hs -0)-ioat{- toE ---x (tH -csoi IHHI ..,ffi^E "r (lt =.o lflj r, 6F l- tr (gkt8o E t'p l3€EE 70 o.E HE >1*uoF. s0\N{v l" \o|{-N\s\ $'t Nil d./L Is At E{r- tJES 7,'A 6CE.o o)a#.=-r 9:dHi PE€d: o cL= c -F(udE sa9 P>(., O, IEEE E IEzFr16 o (1vl)punoJsunlHsnu t. o5\ J {\- CI3HCVUV 33S raqlo desseolE' X uonega6afr spgog/silos Jol8mrlY g srouleluosJoraqurnN = Y[S" o Lo oE.elE l-,o> oE og'i, ' t9 YE n I I I I T I I I I I I I I I I I I I I Workorder Receipt Checklist Energy Laboratories lnc Denison Mines (USA) CorP Login completed by: Kimberly Humiston Reviewed by: Reviewed Date: Shipping containericooler in good condition? Custody seals intect on shipping container/cooler? Custody seals intact on sample bolUes? 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 in complience? Water - VOA vials have zero headspace? Water - pH acceptable upon receipt? Yas [f Yes [J Yes [] Yes fl Yes fl Yes fl Yes ffi Yes fl Yes [J Yes [} Yes [J Yes f! Yes fl Non Non NoE Non NoD No fI NoE NoD NoD NoI Non No fl Non 4"C On lce NoVOAvialssubmitted g NotApplicable n Contact and Cone€tive Aclion Comments: None 1ilffifi f, [ lffi tfiil tfillffi ilililIfl |ilfl Iil ffi c08031 200 Date and Time Received: 3/28/2008 9:30 AM Received bY: im Carrier name: Next DaY Air NotPresent I NotPresent I Not Present [l I ENERcy LABORATORIES. INC- . 2393 Satt Creek Highway (52601) . PO. Box 3258 ' Caspet WY 82602 TollFree88B.235.05l5 ' 307 0515 ' Fax 307.234.1639 ' casper@energylab,q, 'www.energytab.com I Date; 25-APr'08I I I I I I T I I I I I I T I I I CLIENT: Project: Denison Mines (USA) CorP 1st Quarter Surface Water CASE NARRATIVE Sample Delivery GrouP: C08031200 THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT oR tGtNAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (t2"C) Temperature of samples received may not be considered properly preserve! by accepted standards.. Samptes that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHAANALYSIS Method g00.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters' Data provided by this method for non potabte waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid 'exce-ssive decay. Maximum recommended delay beiween end of exposure to beginning of counting should not exceed 8 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 S05 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. SU BCONTRACTI NG ANALYS IS Subcontracting of sample analyses to an outside laboratory may be required. lf so, ENERGY LABORATORIES will utilize its branch laboratories or qualiiied contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b - Energy Laboratories, lnc. - Billings, MT eli-g - Energy Laboratories, lnc. - Gillette, WY eli-h - Energy Laboratories, lnc. - Helena, MT eli-r - Energy Laboratories, Inc. - Rapid City, SD eli-t - Energy Laboratories, lnc. - College Station, TX CERTFICATIONS: USEPA: \41100002; FL-DOH NELAC: E87641;Arizona: A20699: California: 02118CA Oregon: \Al(20000'l ; Utah: 307235051 5; Virginia: 00057; Washington: Cl 903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, lNC. - CASPER,\ 11 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. Atl analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please veriff ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this anatytical service. For additional information and services visit our web page www.energylab.corn. ,5fF7!{,i!!,?#{?i!frq r{f;;'t'f,i![95il f[gg-![lffiA;#!,,tr4*'? ',;,,f;:#ibV:'!:,u:' ANALYTICAL SUMMARY REPORT June 20, 2008 Denison Mines (USA) CorP 6425 S Hwy 191 Blanding, UT 8451'l Workorder No.: C08050705 Project Name; 2nd Quarter SemFAnnual Surface Water Energy Laboratories, lnc. received the fotlowing 1 sample from Denison Mines (USA) Corp on 5l15l2$Og for analysis' Collect Date Receive Date Matrix!ruE P*-* rri"slryr" rD C08050705-001 Cottonwood Creek 05/13/08 08:30 05115108 Aqueous Sample Filtering Uranium, Dissolved Uranium, Suspended Digestion, Total Metals Gross Alpha minus Rn222 and Uranium Radium 226, Dissolved Radium 226, SusPended Thorium, lsotoPic Thorium, Suspended lsotoPic Solids, Total Dissolved Solids, Total SusPended I I t I I I I I I I I t I I I I I I I As appropriate, any exceptions or problems with the analyses are noted in the Laboratory Analytical Repod' the QtuQC Summary Report, orthe Case Narrative. lf you have any questions regarding these tests results, please call' Repo*Approved w,#r# ENEBCY LABORATORIES, lNC. ' 2393 Salt Creek Highway (A60t , P.A 9ox 32-58 ' Caspet WY826A2 TollFree888.235.05l5 , 307t '0515 , Fax 302234.1639 ' casper@energylab.q' 'wwenergylab.com QA/QC Summary Report Client Denison Mines (USA) Corp Project Znd Quarter Semi-Annual Surface Water Report Date: 06/20/08 Work Order: C08050705 , ArElyte RL %REC Low Limit High Limlt IRPD RPDLImit QuaI Ii Method: A284oC SamplelD: MBLKI*080515 Solids, Total Dissolved TDS @ 180 C Sample lD: LCSI_080516 Solids, Total Dissolved TDS @ 180 C Sample lD: G08050700.0028MS Solids, Total Dissolved TDS @ 180 C Sample lD: C08050700-002EMSD Solids, Total Dissolved TDS @ 180 C Method Blank 10 mglL Laboratory Conirol Sample 1000 mg/L Sample Matrix Spike 3300 mgll Sample Matrix Spike Duplicate 3290 mg/L Run: 8AL-1_080521A Run: BAL-1_08052'1A 90 110 Run: BAL1_080521A 90 110 Run: BAL-1_080521A 90 110 Batch: 08051 6-1_SLDS-TDS-W 05/16108 15:05 05/1610& 15:05 05/16/08 15:12 05/16108 15:12 0.4 10 10 I I T I I T I I I I t T I I I I I I I Method: 42640 D Sarnple lD: MBLK1_080517A Solids, Total Suspanded TSS @ 105 C Sample lD: C08050744.007ADUP Solids, Total Suspended TSS @ 105 C Method Blank ND mg/L Sample Duplicate ND mg/L Run: BAL-1_080517A Run: BAL-1_080517A Baich: 08051 7A-SLDS-TSS-W 05/1 7/08 1 0: 1 4 05117108 10:,17 0.0 25 0.7 1.0 Method: E200,8 Sample tD: MB-18653 Method Blank Uranium 5E-05 mglL 2E-05 Sample lDr LCS1-18653 Laboratory Control Sample Uranium 0.0230 mg/L 0.00030 Sample lD: C08050737-0011MS4 Post Digestion Spike Uranium 0.0510 mg/L 0.00030 Sample lD: C08050737-001|MSD4 Post Digestion Spike Duplicate Uranium 0.0518 mg/L 0.00030 1.6 109 101 103 Run: |CPMS24_080603A Run: |CPMS24_080603A 80 120 Run: |CPMS24_080603A 70 130 Run: |CPMS24;080603A 70 130 Batch:18653 06/03/08 22:33 06/03i08 22:46 06/03/08 23:06 06/03108 23:1 3 20 Qualifiers: RL - Analyte reporting limit.ND. Not detected at the reporting limit. ENERCY LABORATOfrIEA lNC. . fr93 Salt Creek Hilghway (82601) . P.O. 9ox 3258 . Caspet W82602 Toll.Free888.235.05l5 . 307, '0515 . Fax 307.234.1639 . casper@energyhb.q' .ww,aenergylab.com QA/QC Summary Report Client Denison Mines (USA) Corp Project 2nd Quarter Semi-Annual Surface Water Report Date: 06120/08 Work Order: C08050705 la*tyt"Result Units RL %REC Low Llmit High Limit RPD RPDLimit Qual Method: E200.8 Samplo tD: LRB Uranium Samplo lD: LFB Uranium Sample lD: C08051207-00lBMS Uranium Sample lD: C08051207-001BMSD Uranium Melhod Blank ND mg/L 1E-05 Laboratory Fortified Blank 0.0541 mglL 0.00030 Sample Matrix Spike 0.0713 mg/L 0.00030 Sample Matrix Spike Duplicate 0.0788 mgtr 0.00030 Run: ICPMS2-C_080530A Run: lCPM524_080530A 85 115 Run: ICPMS2-C_0805304 70 130 Run: ICPMS2-C_080530A 70 130 101 116 Bateh: R101950 05/30108 16:24 05/30/08 16:28 05/30/08 23:12 05130/08 23:29 20 I I T I I I I I I I I I I I I I I I I Method: E900.1 Sample lD: LCS-GA-0132 Gross Alpha minus Rn & U Sample tD: MB-GA-0132 Gross Alpha minus Rn & U Sample ID: C08050764-003BMS Gross Alpha minus Rn & U Sample lD: C08050764.0038MSD Gross Alpha minus Rn & U Laboratory Control Sample 27.2 pCi/L Method Blank 1 pCill Sample Matrix Spike 23.2 pCl/L Sample Matrix Spike Duplicate 26.8 pCl/L Run: G5000W_080527A99 70 130 Run: G5000W_080527A Run: G5000W_080527A73 70 't30 Run: G5000W 080527A 1.0 Batch: GA-0132 0512910822:55 05t29lOB ?2:55 05t2gta8 22'.55 A5/29l08 22:55 24.5 1-0 1.0 70 130 Method: 8903.0 Sample ID: C08050601-001ADUP Radium 226 Sample lD: C08050705.001BMS Radium 226 Sample lD: G08050705-001BMSD Radium 226 Sample lD: MB-18653 Radium 226 Sample lD: LCS-18653 Radium 226 Sample Duplicate -1.2 pCUL Sample Makix Spike 63 pCi/L Sample Matrix Spike Dupllcate 6? pCi/L Method Blank -Z pCi/L Laboratory Control Sample 13 pCill Run: BERTHOLD 770_080527A 70 130 7 .7 Run: BERTHOLD 770_080527A 70 130 Run: BERTH0LD 770_080527A 70 130 ?.2 Run: BERTHOLO 7 7 O _A8O527 A Run: BERTHOLD 770_080527A 70 130 Batch:18653 06/02108 15:56 134.8 U 06lO?1O821:44 06/02108 21:44 25.2 46fi210821:44 U 06l02lQB 21:44 Qualifiers: RL - Analyto repodng limit. U - Not detected at minimum detectable concentration ND - Not deteqted at the reporting limit. ENERGY LAAOBATORIES, lNC, . 2393 Salt Creek Highway (82601) , RO. 8ox3258 . Casper; 1tW82602 Tofl Free 888.235.0515 . 304 - 0515 . Fax 307.234.1639 . casper@energylab,q , www.energylab.(vm QA/QC Summary Report Clienh Denison Mines (USA) Corp Projec0 2nd Quarter Semi-Annual Surface Water Report Date: 0620/08 Work Order: C08050705 II Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual iIri Sample lD: TAP WATER-I,ISD Sample Matrix Spike Duplicato Run: BERTHOLD 770_080521A 7A 130 Batch: RA22G2820 05/29i08 15:57 Run: BERTHOLD 770_080521A 05/29/08 15;57 101 70 '130 9.6 23.1 Method: E903,0 Sample lD: TAP WATER-ttrlS Radium 226 Radium 226 Sample lD: MB-R4226-2820 Radium 226 Sample lD: LCS-RA226-2820 Radium 226 Sample Matrix Spike 7.4 pCi/L 8.2 pCiA Method Blank -0.1 pci/L Laboratory Control Sample 7.9 pCi/L Run: BERTHOLD 770*080521A Run: BERTHOLD 770_0805214 102 7A 130 05i29/08 15:57 U 05/29/08 15:57 I I I t I t I I I I I I I T t I I I I Method: E907.0 Sample lD: C0805060{-O01ADUP Thorium 230 SamplelD: C08050701404AMS Thorium 230 Sample lD: C08050701.004AMSD Thorium 230 Sample lD: LCS-RI01872 Thorium 230 Sample ID: MB-R101872 Thorium 230 Sample Duplicate "0.095 pCi/L Sample Matrix Spike 82.5 pCi/Filter Sample Matrix Spike Duplicate 89.3 pCi/Filter Laboratory Control Sample 55.2 pCi/Filter Method Blank 0.7 p0i/Filter Run: EGG-ORTEC-080523A 70 130 Run: EGG-ORTEC*0805?3A 70 130 Run: EGG-ORTEC_080523A 70 130 Run: EGGORTEC_080523A 70 130 Run: EGG-ORTEC*080523A 0.20 0.20 0.0 8.0 Batch:18653 05i23i08 10:30 30 05/23108 10;30 05123108 1 0:30 30 05123/08 10:30 05/23/08 10:30 115 Method: E907.0 Sample tD: LCS-R102455 Thorium 230 Sample lD: C08050737-001HMS Thorium 230 Sample lD: C08050737-001 HMSD Thorium 230 Sample ID: MB-RI02455 Thorium 230 Laboratory Control Sample 7.54 pCi/L Sample Matrix Spike 16 pCi/L Sample Mahix Spike Duplicate 17 pCi/L Method Blank ND pCi/L Run: EGG.ORTEC_080602D 70 130 Run: EGG.ORTEC_080602D 70 130 Run: EGG-ORTEC_080602D 70 130 5.4 Ruu EGG-ORTEC_080602D '109 Batch: R102465 06/02/08 15:00 06102/08 15:00 06102/08 15:00 30 06/02108 15:00 0.20 0.20 Qualifiers: RL - Analyte reporting fimit. U - Not detected at minimum detoctable concentration ND - Not detecied at the reporting limit. ENEBGY LABORATORIES, lNC. . 2393 Salt Creek Htghway (5260A . P.O. aox 3258 ' Caspec WY 82602 TottFree888.235.05l5 , 301 '0515 , Fax 307.234.1639 ' casper@energylab.( 'www.energytab.con QA/QC Summary Report Clienk Denison Mines (USA) CorP Project: 2nd Quarter Semi-Annual Surface Water Report Date: 06120/08 Work Order: C08050705 I Analyte I Result Units RL %REC Low Limit HIgh Limit RPD RPDLimit Qual i I I I I I I I I I t I I I I I I I t I Method: Sample lD: Uranium Sample lDl Uranium Sample lD: Uranium Sample lD: Uranium sw6020 MB-f 8653 LCS1-1 8653 c08050701.006AMs c08050701-006AMsD Method Blank ND mg/filter Laboratory Control Sample 0-0503 mg/filter Sample Makix Spike 0.0502 mg/fllter Sample Matrix Spike Duplicate 0.0503 mg/filter 6E-05 0.00030 0.00030 0.00030 95 r00 Run: ICPMSl-C-080527A Run: ICPMSl4-080527A 7s 125 Run: ICPMSl-C-0805274 75 125 Run: ICPMS1-C_0805274 75 125 Batch: 18653 05/27108 20:31 051271A824:45 05t271O821:31 0512710821i34 20 Qualifiersl RL - Analyte repo(ing limit.ND - Not detected at the reporting limit. lri flfill;Iell o il5IEl[ 6I.E.VIE .E ls" od lEs Els &-EI o-11! o o)IE€ EI.EiE I.EE6Iai (aIti o (Dlb ="El* E o IEE € IEE EIg>r: IE.E Elo ulf,le8;lz= X Ef;E5:bouts!6 L 3EE!.:.ErE5.=EOEgEH 'r- ll E f E I9 e{it.e s!;,: br;Efi8bsE sE8 Eto -'=OvE> (!€E oro"'=a.9 u,j*r EE};8UP -E .oE> eo Eoo --liF-oJ Ioo)(0 0- oiEEl-oo* EiM"^ ,l-9aEo35EcrEolr0(5 -:(E:o*i=#ho; (U# -lhIrO<[E5ts-LrG(sEo>rEtt€o=g-i/, 3ql 0)dECIi t{- oo5 .sE(EH -c<oH I I :HHI zzZ,r@ F o, E e illgcgs' tat IIirS I\J .F'rNilN6c$ ?a 6E HE Irt (gtrI.9 orr/tEc-]fEEHdUi"o€ ^- a E€p-Frud€ sltr:EIE>o orlPE* E IEzFrlg o (lvl}punoJeurnlHsnu orHcvllv 33s Tf srqr reql6 ^BsseolEl Xuorrpl?Oanspllos/s1gogra1e64f IOEASMV:adrtlaldurBs t srauleluoS ]o JaqurnN E fT 5$oNL Y'f, ^4 .f gAE € N = o o o-oELJ oE o3si,' =oYE neP <(u;3 Jcr NEe <uiBt.totr &H n co';= d)8E O oEO' EFo-o Workorder Receipt Checklist Energy Laboratories lnc Denison Mines (USA) Corp Login completed by: Kimberly Humiston Reviewed by: Reviewed Date: Shipping containerlcooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody preseni? Chain of custody signed when rellnquished and received? Chain of custody agrees with sample labels? Samples in proper containerlbottle? Sample containers intact? Sufricient sample volume for indicated test? All samples received within holding time? Containerffemp Blank temperature in compliance? Water - VOA vials have zero headspace? Water - pH acceptable upon receipt? Yes fl Yes [J Yes fl Yes [t Yes ffi Yes [[ Yes [J Yes fl Yes fl Yes ffi Yes ffi Yes fl Yes fl V tilililIilililIiltilil rffi ltfl lilillll llllllillllll c08050705 Date and Time Received: 5/15/2008 9:45 AM No fl No fl NoE NoI NoD NoE Non NoU NoE NoE NoE No fl NoI Received by: gt Carrier name: Ground NotPresent fl NotPresent I Not Present EJ 5"c No VOA vials submitted NotApplicable n Contact and Corrective Action Comments: Sample was filtered and preserved in tab with HNO3. I ENERGY LAEORATOHIES, lNC. . 2393 9a/t Creek Hrghway (82601) ' PO. 8ax 325.8 TottF1ee888,235.A5/5 .302i{ r$ . Fax307.234.1639 ,'casper@energylab.co('- , Casper; WY82602 'ww,anergylab.com t Datez 2O-Jun-08I I I I I I T I I I I I I I I Project: Denison Mines (USA) Corp 2nd Quarter Semi-Annuat Surface Water CASE NARRATIVE Sample Delivery Group: C08050705 THIS IS THE FINAL PAGE OF THE LABORATORY ANALYTICAL REPORT oRTGtNAL SAMPLE SUBMTT|AL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE; 4"C (*2"C) 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 a 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 (2 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 B 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. \Mren 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. lf so, ENERGY LABORATORIES will utilize its branch taboratories or qualified contract laboratories lor 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, lnc. - Gillette, WY eli-h - Energy Laboratories, lnc. - Helena, MT eli-r - Energy Laboratories, lnc. - Rapid City, SD eli-t - Energy Laboratories, lnc. - College Station, TX CERTFICATIONS: USEPA: WY00002; FL-DOH NELAC; E87641: Arizona: A20699: California:02'l18CA Oregon: W200001 ; Utah: 307?35051 5; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, lNC. - CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some resutts 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 verifo ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity 1o provide you with this analytical service, For additional informalion and services visit our web page wwwenergylab.com. T I