DRC-2013-001590 - 0901a0688035aff2

State of Utah
GARY R. HERBERT
Governor
GREG BELL
Lieutenant Governor
Department of
Environmental Quality
Amanda Smith
Executive Director
DIVISION OF RADL\TION CONTROL
Rusty Lundberg
Director \
MEMORANDUM
TO:
FROM:
DATE:
SUBJECT:
Phil Goble
Dean Henderson
March 12,2013
0^ ^'^n n DRC-2013-001590
Review of the 4th Quarter 2012 Nitrate Monitoring Report for the Nitrate Contamination
Investigation, Energy Fuels Resources (USA) Inc. ("EFR") White Mesa Uranium Mill,
near Blanding, Utah
The Utah Division of Radiation Control ("DRC") has reviewed the February 25,2013, White Mesa
Uranium Mill 4th Quarter 2012 Nitrate Monitoring Report ("Report") for the Nitrate Contamination
Investigation.
This Report is required under the Stipulated Consent Agreement, State of UDEQ Docket No. UGW-09-03
("SCA") and the EFR Plan and Schedule for Nitrate Contamination Investigation Report and Groundwater
Corrective Action Plan White Mesa Mill Uranium Mill Site Blanding, Utah. November 21, 2008
("PCIRCAP"). Based on the schedule included for the approved May 7,2012 Corrective Action Plan for
Nitrate ("CAP") all activities associated wdth the implementation ofthe CAP began in January, 2013.
Because none ofthe CAP requirements have been implemented in the 4th quarter 2012, and as agreed to m
a telephone conversations with EFR and DRC on January 14,2013, this 4* quarter 2012 Report is not
required to include any of the additional reporting requirements specified in the CAP. The additional
reporting requirements specified in the CAP will be included in the quarterly nitrate reports beginning with
the report for the quarter of 2013 which is required to submitted on or before June 1, 2013.
For the review of this Report the following regulatory enforcement documents were used:
• Stipulated^Consent Agreement, State of Utah Division of Environmental Quality Docket No.
UGW-09-03. EFR was issued SCA on January 27,2009.
• Plan and Schedule for Nitrate Contamination Westigation Report and Groundwater Corrective
Action Plan ("PCIRCAP") White Mesa Mill Uranium Mill Site Blanding, Utah. November 21,
2008.
• EFR was issued Ground Water Quality Discharge Permit No. UGW370004 ("Permit") on March 8,
2005; last revised on August 24,2012.
• The EFR Quality Assurance Plan ("QAP") June 7,2012 (Revision. 7.2)
195 North 1950 West • Salt Lake City, UT
Mailing Address. PO Box 144850 • Salt Lake City, UT 84114-4850
Telephone [phone] • Fax [phone] • T.D D. [phone]
www deq Utah gov
Pnnted on 100% recycled paper
Page 2
REVIEW
Monitor Well Sampling
The follovvdng monitor wells were sampled (see Table 1 below):
TWN-1, TWN-2, TWN-3, TWN-4, TWN-5, TWN-6, TWN-7, TWN-8, TWN-9, TWN-10, TWN-11,
TWN-12, TWN-13, TWN-14, TWN-16, TWN-18, TWN-19, Piezometer 1, Piezometer 2, and Piezometer
3.
The followdng monitoring wells were purged using the three approved QAP well purging strategies and
meet QAP requirements for each strategy:
1. Purging two casing volumes with stable field parameters for specific conductivity,
turbidity, pH, redox potential, and water temperature (within 10% RPD):
Wells: TWN-1, TWN-4, TWN-5, TWN-6, TWN-8, TWN-11, TWN-12, TWN-13, TWN-
16, TWN-18, and TWN-19.
2. Purging a well to dryness and stability of field parameters for pH, specific conductivity, and
water temperature only after recovery:
Wells: TWN-2, TWN-3, TWN-7, TWN-9, TWN-10, TWN-14, TWN-15, and TWN-17
The water samples for the above wells were analyzed for chloride and nitrate plus nitnte as nitrogen as
required in the SCA and PCIRCAP. Chloride and nitrate plus nitrite as nitrogen were analyzed for
methods consistent with the requirements of the QAP.
QAQC
Holding Times
The method holding times for each parameter for samples collected at each monitor well were received and
analyzed within the required holding times in the QAP.
Receipt Temperature
All samples were received within the required QAP temperature limit of 6° C.
Detection Limits
All sample sets were measured and reported to the required QAP reporting limits.
Sample Duplicates
Two duplicate samples were collected. Well TWN-4 and its duplicate sample TWN-65 and TWN-15 and
its duplicate sample TWN-70. All analytical results for both the sample/duplicate pairs were v^thin the
20% acceptance limits as required in the QAP (see Table 2 below).
Groundwater Head Monitoring
Depth to groundwater was measured in the following wells and/or piezometers as required in Part I.E.3 of
the Permit:
Page 3
• The quarterly groundwater compliance monitonng wells.
• Existing monitoring well MW-4 and all of the temporary chloroform investigation
wells.
• Piezometers P-1, P-2, P-3, P-4 and P-5.
• MW-20, MW-22 and MW-34
• Nitrate monitoring wells.
• The DR piezometers which were installed during the Southwest Hydrologic
Investigation.
• In addition to the above, depth to water measurements are routinely observed in conjunction with
sampling events for all wells sampled during quarterly and accelerated efforts, regardless of the
sampling purpose.
All well levels used for groundwater contour mapping were measured and recorded
within 5 calendar days of each other.
Reporting
The Report included the following information as required in the PCIRCAP:
a) Introduction
b) Sampling and Monitoring Plan:
i. Description of monitor wells sampled;
ii. Description of sampling methodology, equipment and decontamination
procedures;
iii. Identification of all quality assurance samples, e.g. equipment blanks
duplicate samples, etc.
c) Data Interpretation:
i. Interpretation of groundwater levels, gradients, and flow directions. The interpretation will
include a discussion on: 1) current site groundwater contour map, 2) hydrographs to show
groundwater elevation in each monitor well over time, 3) depth to groundwater measured and
groundwater elevation from each monitor well summarized in data table that includes historic
groundwater level data for each well;
ii. Interpretation of all analytical results for each well including a discussion on: 1) a current
nitrate isoconcentration map, 2) graphs showing nitrate concentration trends in each well
through time and, analytical results for each well summarized in data table that includes
historic analytical results for each well; and
iii. An electronic copy of all laboratory results for groundwater quality monitoring conducted
during the quarter will be provided to the ExecuUve Secretary.
d) Conclusions and Recommendations
e) Copies of EFR field reports, laboratory reports, and chain of custody forms. The nitrate plume is
defined to include any monitoring well that has concentration of nitrate in excess of 10 mg/L.
Conclusions on Compliance with the SCA, Permit and QAP
Per the DRC review it appears that the Report complies with SCA, PCIRCAP, Permit and QAP.
Therefore a letter will be drafted for the Director Signature, notifying EFR of the review and closing-out
of the 4th Quarter 2012 Nitrate Monitoring Report.
Page 4
References
Energy Fuels Resources (USA) Inc., November 21,2008, Plan and Schedule for Nitrate Contamination
Investigation Report and Groundwater Corrective Action Plan White Mesa Mill Uranium Mill Site
Blanding, Utah.
Energy Fuels Resources (USA) Inc., Jime 7,2012 White Mesa Uranium Mill, Ground Water Monitoring
Quality Assurance Plan (Revision 7.2).
Energy Fuels Resources (USA) Inc., February 25,2013, White Mesa Uranium Mill Nitrate Monitoring
Report 4th Quarter (October through December) 2012
HYDRO GEO CHEM, INC, May 7,2012 Corrective Action Plan for Nitrate White Mesa Uranium
Mill near Blanding, Utah
State of Utah Division of Water Quality Department of Environmental Quality, August 24,2012, Ground
Water Discharge Pemiit for Denison Mines (USA) Corp. at the White Mesa Mill Facility Near Blanding,
Utah.
State of Utah Division of Water Quality Department of Environmental Quality, January 2009, SUpulated
Consent Agreement, UDEQ Docket No. UGW-09-03.
Table lof 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-1
Monitoring Event
TWN-2
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/i)
1st Qtr 3/17/2010 0.5 17 1st Qtr 3/24/2010 62.1 85
2nd Qtr 5/26/2010 0.6 20 2nd Qtr 6/2/2010 69 97
3rd Qtr 9/27/2010 0.6 19 3rd Qtr 9/29/2010 69 104
f!tl']..9t.r..i.?./.7/.?9.i.9. 0.6 14 4th Qtr 12/9/2010 4S 93
isfQtri726/20il """o.'s 17 1st Qtr 2/1/2011 " 43^ 93
2nd Qtr 4/20/2011 0,5 19 2nd Qtr 4/28/2011 40 85
3rd Qtr 7/26/2011 0.5 14 3rd Qtr 7/28/2011 33 74
4tli Qtr iq/17/20n 0.5 10 4th Qtr 10/20/2011 33 76
ist Qtr 1/9/2012 0.6 15 ist Qtr 1/12/2612 31 86
2nd Qtr 4/18/2012 0.6 17 2nd Qtr 4/20/2012 48 103
3rd Qtr 7/24/2012 0,6 17 3rd Qtr 7/31/2012 54 93
4tfi Qtr 10/17/2012 0.43 17,5 4th Qtr 7/17/2012 22.10 79
Monitoring Event
TWN-3
Monitoring Event
TWN-4
Monitoring Event Nitrate, Nitrate •»•
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/25/2010 25.3 111 1st Qtr 3/16/2010 0,9 22
2nd Qtr 6/3/2010 26 118 2nd Qtr 5/27/2010 1,0 22
3rd Qtr 7/16/2010 27 106 3rd Qtr 9/27/2010 0,9 19
4tii Qtr 12/10/2010 24 117 4tli Qtr 12/8/2010 1.0 21
ist Qtr 2/1/2011 138 1st Qtr i/2'5/2611 d"9 21
2nd Qtr 4/28/2011 26 128 2nd Qtr 4/20/2011 0,9 21
3rd Qtr 7/29/2011 25 134 3rd Qtr 7/26/2011 Ll 35
4th Qtr 10/20/2011 25 JL29 4tli Qtr 10/18/2011 0.9 20
ist Qtr 1/12/2012""" 25 143 ist Qtr 1/9/2012 b"9 '20
2nd Qtr 4/20/2012 24 152 2nd Qtr 4/18/2012 Ll 24
3rd Qtr 7/31/2012 27 158 3rd Qtr 7/25/2012 1,4 25
4th Qtr 10/17/2012 12.1 149 4th Qtr 7/15/2012 1,45 26,4
Monitoring Event
TWN-5
Monitoring Event
TWN-6
Monitoring Event Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/16/2010 0,3 43 1st Qtr 3/23/2010 1,5 19
2nd Qtr 5/26/2010 0.3 44 2nd Qtr 6/1/2010 1.4 22
3rd Qtr 7/12/2010 0,3 43 3rd Qtr 7/13/2010 1.4 73
4tli Qtr 12/7/2010 0.3 45 4th Qtr 12/7/2010 1.2 _ 21
ist Qtr 1/25/2011"" "o"4" 47 ist Qtr i/26/2011 i.i is
2nd Qtr 4/20/2011 0,3 44 2nd Qtr 4/20/2011 1.5 22
3rd Qtr 7/26/2011 0,3 44 3rd Qtr 7/27/2011 1.1 17
4tl] Qtr 10/17/2011 0.3 45 4th Qtr 10/18/2011 1,4 21
ist"Qtr"l/9/26i2"""'"" 0,2 "45 1st Qtr 1/10/2012 1.2 20
2nd Qtr 4/18/2012 0,3 39 2nd Qtr 4/18/2012 Ll 22
3rd Qtr 7/24/2012 0,3 48 3rd Qtr 7/25/2012 1.4 22
4th Qtr 10/15/2012 <0,1 43,5 4th Qtr 7/15/2012 0.78 20.4
Shaded = Nitrate, Nitrate + Nitnte concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 2 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-7
Monitoring Event
TWN-8
Monitoring Event Nitrate, Nitrate -t-
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010 0.8 6 1st Qtr 3/16/2010 <0.1 11
2nd Qtr 5/28/2010 1,2 6 2nd Qtr 5/26/2010 <0,1 11
3rd Qtr 7/14/2010 L8 7 3rd Qtr 7/12/2010 <0.1 11
4th Qtr 12/10/2010 1 4 4th Qtr 12/7/2010 <0.1 9
is'tQtr"l/27/2"bii" """"i"3 6 ist Qtr i/25/20li <o.i 13
2nd Qtr 4/21/2011 L7 6 2nd Qtr 4/19/2011 <0.1 10
3rd Qtr 7/29/2011 0.7 5 3rd Qtr 7/26/2011 <0,1 18
4th Qtr 10/19/2011 2,2 6 4th Qtr 10/17/2011 <0.1 10
1st Qtr 1/11/2612 2",'3 5 1st Qtr 1/9/2012 <0,1 li
2nd Qtr 4/20/2012 1,2 6 2nd Qtr 4/18/2012 <0,1 15
3rd Qtr 7/26/2012 0,9 6 3rd Qtr 7/24/2012 <0,1 11
4th Qtr 10/16/2012 0,64 5,67 4th Qtr 7/15/2012 <0,1 11,4
Monitoring Event TWN-9 Monitoring Event TWN-10
Nitrate, Nitrate + Chloride (mg/l) Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 3/23/2010 7.6 183 1st Qtr 3/23/2010 1,5 54
2nd Qtr 6/1/2010 7.7 175 2nd Qtr 6/2/2010 1.0 30
3rd Qtr 7/15/2010 10.7 210 3rd Qtr 7/14/2010 0,2 21
4th Qtr 12/9/2010 " ^" ..r ...8-p 172 4th Qtr 12/8/2010 1.3 28
1st Qtr 2/1/2011"" " 9.5 217 1st Qtr 1/26/2011 0.3 40
2nd Qtr 4/28/2011 " """""lo.io 192 2nd Qtr 4/21/2011 1.2 28
3rd Qtr 7/29/2011 11.0 208 3rd Qtr 7/27/2011 0,1 28
4tliQtr 10/20/2011 1D.9 134 4th Qtr 10/18/2011 0.2 33
ist Qtr l/i2/2012 ^ 12.^ 202 1st (itr"i/10/2012" ""0,8 44
2nd Qtr 4/20/2012 10.6 209 2nd Qtr 4/19/2012 0,9 28
3rd Qtr 7/31/2012 12.3 215 3rd Qtr 7/25/2012 0.6 33
4th Qtr 10/17/2012 12.5 194 4th Qtr 7/16/2012 0.12 30.8
Monitoring Event TWN-11 Monitoring Event TWN-12 Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010 1.4 73 1st Qtr 3/17/2010 0,7 113
2nd Qtr 6/1/2010 1.3 72 2nd Qtr 5/26/2010 0,8 106
3rd Qtr 9/27/2010 1,4 76 3rd Qtr 7/12/2010 0,7 112
4th Qtr 12/8/2010 " [ 1.4 72 ^!t.^?.^lC..?:.?/Z/2plO 0.7 193
1st Qtr 1/27/2011 "lA 84 ist Qtr 1/26/2611" 4^2" 87
2nd Qtr 4/26/2011 1,4 76 2nd Qtr 4/26/2011 1.0 109
3rd Qtr 7/27/2011 0,1 76 3rd Qtr 7/26/2011 0.6 102
4tli Qtr 10/17/2011 1,6 76 4th Qtr 10/17/2011 L2 87
istQtri/io/2oii "L6 69 1st Qtr 1/10/2012 0,9 """i64
2nd Qtr 4/19/2012 1,6 71 2nd Qtr 4/18/2012 i.2 106
3rd Qtr 7/25/2012 1,8 77 3rd Qtr 7/25/2012 1,4 102
4th Qtr 10/16/2012 1.84 76,4 4th Qtr 7/16/2012 1,41 101
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 3 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-13 Monitoring Event TWN-14 Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate -f
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010 <0,1 47 1st Qtr 3/24/2010 2,9 24
2nd Qtr 5/26/2010 0.1 49 2nd Qtr 6/2/2010 2,9 30
3rd Qtr 9/27/2010 0,2 53 3rd Qtr 7/15/2010 3,5 26
4th Qtr 12/7/2010 0,4 57 4th Qtr 12/10/2010 4.2 28
istQtri/25/20li 1,6 103 lstQtr'"i/28726ii 3,7 24
2nd Qtr 4/26/2011 <0.1 49 2nd Qtr 4/27/2011 3,5 30
3rd Qtr 7/26/2011 0,1 49 3rd Qtr 7/29/2011 3.5 25
4th Qtr 10/17/2011 <0,1 48 4th Qtr 10/19/2011 3,9 27
1st Qtr 1/9/2012 <0,1 46 1st Qtr 1/11/2012 3.5 26
2nd Qtr 4/18/2012 <0,1 53 2nd Qtr 4/20/2012 3.4 27
3rd Qtr 7/24/2012 0,1 48 3rd Qtr 7/27/2012 3,7 27
4th Qtr 10/15/2012 <0,1 47,3 4th Qtr 7/17/2012 4.03 27,4
Monitoring Event TWN-15 Monitoring Event TWN-16 Monitoring Event
Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/18/2010 0,7 43 1st Qtr 3/17/2010
2nd Qtr 5/27/2010
L2 35
2nd Qtr 5/28/2010 1,0 39
1st Qtr 3/17/2010
2nd Qtr 5/27/2010 1.3 35
3rd Qtr 7/13/2010 1,0 36 3rd Qtr 9/27/2010 2,6 35
4th Qtr12/9/2010 1.2 38 4th Qtr 12/9/2010 2 30
ist Qtr 1/27/2011 ""i!4" "43 istQtr"i727/20i'i '4,'6 34
2nd Qtr 4/27/2011 1,6 49 2nd Qtr 4/27/2011 1,6 39
3rd Qtr 7/28/2011 1,6 47 3rd Qtr 7/27/2011 2,4 31
4th Qtr 10/19/2011 1,3 38 4th Qtr 10/18/2011 2,6 34
1st Qtr i/ll/2612 1.5 38 1st Qtr 1/16/2012 2,8 '33
2nd Qtr 4/20/2012 1,6 46 2nd Qtr 4/19/2012 2,0 50
3rd Qtr 7/26/2012 2.1 50 3rd Qtr 7/25/2012 2,4 33
4th Qtr 10/17/2012 1.79 47 4th Qtr 7/16/2012 2,50 32,1
Monitoring Event TWN-17 Monitoring Event TWN-18 Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/24/2010 10.4 78 1st Qtr 3/17/2010 1,6 42
2nd Qtr 6/3/2010 11 87 2nd Qtr 6/1/2010 1,8 63
3rd Qtr 7/15/2010 8,9 66 3rd Qtr 9/27/2010 1.8 64
4tii Qtr 12/10/2010 8 \ 65 4th Qtr 12/9/2010 1.6 59
1st Qtr 2/1/2011 '8""6" 90 1st Qtr 1/27/2011 'i"4 61
2nd Qtr 4/28/2011 9 81 2nd Qtr 4/26/2011 1,8 67
3rd Qtr 7/29/2011 8,5 74 3rd Qtr 7/28/2011 L8 65
4th Qtr 10/20/2011 8,1 71 4th Qtr 10/18/2011 1,9 60
1st Qtr 1/12/2012 8,7 79 1st Qtr 1/10/2012 1,9 64
2nd Qtr 4/20/2012 9.1 80 2nd Qtr 4/19/2012 2,1 64
3rd Qtr 7/27/2012 9.5 85 3rd Qtr 7/26/2012 2,3 67
4th Qtr 10/17/2012 9.65 84.8 4th Qtr 7/16/2012 1,95 67,5
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 4 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-19 Monitoring Event Upper Wildlife Pond (UMLP)
Nitrate, Nitrate + Chloride (mg/l) Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 3/23/2010 7.2 118 1st Qtr 3/18/2010 <0,1 <1,0
2nd Qtr 6/1/2010 6,2 113 2nd Qtr 6/2/2010 <0,1 <1,0
3rd Qtr 9/27/2010 7,2 113 3rd Qtr 7/19/2010 <0,1 <1,0
4th Qtr 12/9/2010 7,0 107 4th Qtr 12/10/2010 <0,1 1
ist Qtr 2/1/2611 7,0 ii4 ist Qtr 1/31/2011 6!i i
2nd Qtr 4/28/2011 6.9 120 2nd Qtr 4/25/2011 <0,1 <1.0
3rd Qtr 7/28/2011 7,1 113 3rd Qtr 7/25/2011 <0.1 <1,0
4th Qtr 10/18/2011 6.5 108 4th Qtr 10/19/2011 <0,1 <1,0"
1st Qtr 1/16/2612 7,0 ii4 1st Qtr i/3i/26l2 0,1 i
2nd Qtr 4/19/2012 6,8 117 2nd Qtr 2012 NS NS
3rd Qtr 7/26/2012 7.5 117 3rd Qtr 2012 NS NS
4th Qtr 10/16/2012 7,7 118 4th Qtr 2012 NS NS
Monitoring Event Piezometer 1 Monitoring Event Piezometer 2
Nitrate, Nitrate + Chloride (mg/l) Nitrate, Nitrate -i-Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 2010 NS NS 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010 7.2 52 2nd Qtr 6/2/2010 0.6 8
3rd Qtr 7/19/2010 6,8 52 3rd Qtr 7/19/2010 0,6 8
4th Qtr 12/10/2010 6.5 60 4tli Qtr 12/10/10 0,2 6
1st Qtr 1/31/2011 7 60 ist citr 1/31/2011 0,3 9
2nd Qtr 4/25/2011 6.8 58 2nd Qtr 4/25/2011 0,3 8
3rd Qtr 7/25/2011 7 53 3rd Qtr 7/25/2011 0,1 9
4th Qtr 10/19/2^ 6.6 55 4th Qtr 10/19/2011 0,1 8
1st Qtr i/ii/2612 7"l 78 1st Qtr i/ll/2612" 0,1 9
1st Qtr 1/10/2012 7,0 114 1st Qtr 1/31/2012 0.1 1
2nd Qtr 4/20/2012 6.6 58 2nd Qtr 4/20/2012 0,2 8
3rd Qtr 7/27/2012 7.2 56 3rd Qtr 7/27/2012 0,2 9
4th Qtr 10/17/2012 7.66 55 4th Qtr 7/17/2012 0,19 9.5
Monitoring Event Piezometer 3 Monitoring Event Pond D
Nitrate, Nitrate + Chloride (mg/l) Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 3/24/2010 1,7 116 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010 1,6 36 2nd Qtr 2010 NS NS
3rd Qtr 7/19/2010 1,8 35 3rd Qtr 2010 NS NS
4th Qtr 12/9/2010 1,8 _25 4th Qtr 2010 NS NS
1st Qtr 1/31/2011 "i,"8 40 lstQtrl/3i/26ii' 6!i
2nd Qtr 4/25/2011 1.7 35 2nd Qtr 2011 NS NS
3rd Qtr 7/25/2011 1,8 61 3rd Qtr 2011 NS NS
4th Qtr 10/19/2011 1.7 12 4th Qtr 2011 NS ISIS
1st Qtr 1/11/2012 1,8 "" '""'20 ist Qtr 2612 'NS
2nd Qtr 4/20/2012 L7 53 2nd Qtr 2012 NS NS
3rd Qtr 7/27/2012 1,8 21 3rd Qtr 2012 NS NS
4th Qtr 10/17/2012 2,75 20.1 4th Qtr 2012 NS NS
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NS = Not sampled
Table 2
Summary of QA/QC Duplicate Samples
4th Quarter 2012
Parameter GWQS •up icate of M W-9 Duplicate of TW4-21 Parameter GWQS
TWN-4 TWN-65 RPD TWN-15 TWN-70 RPD
Nitrate + Nitrite (as N) 10 mg/L 1.45 1.45 0.0 1.79 2 -11.1
Chloride none 26.4 25.6 3.1 47 44.4 5.7