DRC-2017-007177 - 0901a06880758e2e

State of Utah
GARY R. HERBERT
Governor
SPENCER J. COX
Lieutenant Governor
Department of
Environmental Quality
Alan Matheson
Executive Director
DIVISION OF WASTE MANAGEMENT
AND RADIATION CONTROL
Scott T. Anderson
Director
MEMORANDUM
TO:
FROM:
DATE:
Phil Goble
Dean Henderson QA lHz°n
September 13, 2017
SUBJECT: Review of the 1st Quarter, 2017 Chloroform Monitoring Reports for the Chloroform
Contamination Investigation, Energy Fuels Resources (USA) Inc. (“EFR“) White Mesa
Uranium Mill, near Blanding, Utah
The Utah Division of Waste Management and Radiation Control (“Division”) has reviewed the May 17,
2017 1st Quarter 2017 Chloroform Monitoring Report (“Report”) for the Chloroform Contamination
Investigation. For the review of this report the following regulatory enforcement documents were used:
• EFR issued Ground Water Quality Discharge Permit No. UGW370004 (“Permit”). Permit
version that was signed on August 24, 2012.
• The EFR Quality Assurance Plan (“QAP”) August 15, 2017 (Revision. 7.3)
• The EFR Groundwater Corrective Action Plan (“GCAP”) September 14, 2015 (Revision 0)
• Utah Department of Environmental Quality Division of Radiation Control Guidance for
Groundwater Split Sampling Collection at Uranium Mill Operations, August 7, 2007.
REVIEW
Monitor Well Sampling
The following monitor wells were sampled as required in the QAP (see Table 1 below):
MW-4 TW4-8 TW4-20 TW4-30
MW-26 TW4-9 TW4-21 TW4-31
MW-32 TW4-10 TW4-22 TW4-32
TW4-1 TW4-11 TW4-23 TW4-33
TW4-2 TW4-12 TW4-24 TW4-34
195 North 1950 West • Salt Lake City, UT
Mailing Address. P.O. Box 144880 • Salt Lake City, UT 84114-4880
Telephone [phone] • Fax [phone] • T D.D. (801) 5364414
iimrw.deq.uhih.gov
Printed on 100% recycled paper
Page 2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
TW4-13
TW4-14
TW4-16
TW4-18
TW4-19
TW4-25
TW4-26
TW4-27
TW4-28
TW4-29
TW4-35
TW4-36
TW4-37
TW4-38
TW4-39
The 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: MW-32, TW4-3, TW4-5, TW4-7, TW4-8, TW4-9, TW4-12, TW4-16, TW4-18, TW4-23,
TW4-28, TW4-32, and TW4-38.
2. Purging a well to dryness and stability of field parameters for pH, specific conductivity, and
water temperature only after recovery:
Wells: TW4-6, TW4-10, TW4-13, TW4-14, TW4-26, TW4-29, TW4-30, TW4-31, TW4-33,
TW4-34, TW4-35, and TW36.
3. Pumping Wells: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-20, TW4-
21, TW4-22, TW4-24, TW4-25, TW4-37, and TW4-39.
The water samples for the above wells were analyzed for the following constituents as required in the
QAP:
Chloroform Chloride
Chloromethane Methylene chloride
Carbon tetrachloride Nitrate + Nitrite as Nitrogen.
The analytical methods used is consistent with the requirements of the QAP.
Holding Times
The water samples 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
Water samples were received within the required QAP temperature limit of 6° C.
Detection Limits
Analytes were measured and reported to the required reporting limits. However, several sets of sample
results had the reporting limit raised for at least one analyte due to matrix interference and/or sample
dilution. In all cases the reported value for the analyte was higher than the increased detection limit.
Page 3
EFR Duplicate Sample Comparison
Three duplicate samples were collected. Monitor well TW4-18 and its duplicate sample TW4-75, TW4-
28 and its duplicate sample TW4-65, and TW4-23 and its duplicate sample TW4-70. All analytical
results for the three sample/duplicate pairs were within the 20% acceptance limits (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:
• The quarterly groundwater compliance monitoring wells.
• Existing monitoring well MW-4 and all of the temporary chloroform investigation wells.
• Piezometers P-1, P-2, P-3 A, P-4 and P-5.
• MW-20 and MW-22.
• Nitrate monitoring wells.
• The DR piezometers which were installed during the Southwest Hydrologic Investigation.
In addition, weekly and monthly depth to groundwater measurements were taken in pumping wells
MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-20, TW4-21, TW4-22, TW4-24,
TW4-25, TW4-37, TW4-38, TW4-39 and TWN-2.
Mass Removed and Plume Residual Mass
Chloroform removal was first estimated from the first quarter 2007. Since that estimation the mass
removed by each pumping well for each quarter has been calculated. Estimated reported mass removed
during the 1st Quarter 2017 is 27.2 lbs. Table 3 below verifies this estimate.
Using the “Chloroform Plume Mass Calculation Method” as described in Appendix A of the GCAP the
residual mass of chloroform within the plume is estimated as 1271 lbs. in the 1st Quarter, 2017. As per
Part III.B.2 of the GCAP, the electronic files were used in 1st Quarter, 2017 to calculate the mass
estimates. The following files were used to calculate the estimated chloroform mass within the
chloroform plume:
• Excel spreadsheet that included: well name; well location (easting and northing); Laboratory
reported concentration in pg/1 in the 1st quarter 2017 and corresponding log equivalent values.
• Surfer® griding parameters: kriging parameters: SURFER™ default parameters (point kriging,
linear variogram, slope = 1, no anisotropy [anisotropy = 1], no search constraints; min x, max x
(UTME[m]): 631900, 633043; min y, max y (UTME[m]): 4154240, 4155550.64; grid spacing in
x, y (m): 15.24, 15.24
• Surfer chloroform concentration grid file.
• Concentration GE 70 Grid file
• Intermediate Surfer Grid Files: water level grid; aquifer base grid; saturated thickness grid
Based on the review of these files it appears that the date entered and generated is appropriate to
calculate an estimated chloroform mass within the chloroform plume and EFR followed Part III.B.2 and
Appendix A of the GCAP.
Page 4
Reporting
The Report included the following information as required in the QAP:
a) Introduction
b) Sampling and Monitoring Plan
-Description of monitor wells
-Description of sampling methodology, equipment and decontamination procedures
-Identify all quality assurance samples, e.g. trip blanks, equipment blanks,
duplicate samples
c) Data Interpretation
-Interpretation of groundwater levels, gradients, and flow directions.
Interpretations will include a discussion on: 1) A 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 a data table,
that includes historic groundwater level data for each well, and 4) an
evaluation of the effectiveness of hydraulic capture of all contaminants of
concern.
-Interpretation of all analytical results for each well, including a discussion
on: 1) a current chloroform isoconcentration map with one of the
isoconcentration lines showing the 70 pg/L boundary, 2) graphs showing
chloroform concentration trends in each well through time and, 3)
analytical results for each well summarized in a data table, that includes
historic analytical results for each well.
-Calculate chloroform mass removed by pumping wells. Calculations
would include: 1) total historic chloroform mass removed, 2) total historic
chloroform mass removed for each pumping well, 3) total chloroform
mass removed for the quarter and, 4) total chloroform mass removed from
each pumping well for the quarter, 5) estimated residual mass of chloroform within the
plume.
d) Conclusions and Recommendations
e) Electronic copy of all laboratory results for Chloroform Investigation monitoring conducted
during the quarter.
f) Copies of DUS A field records, laboratory reports and chain of custody forms.
Evaluation of the Chloroform Contaminate Plume and Its Associated Contaminants
Bounding Chloroform Plume
Groundwater monitoring data up to the 1st Quarter, 2017 monitoring event appeared to show that the
chloroform contaminate plume (“Plume”) and associated contaminants, carbon tetrachloride,
chloromethane, and methylene chloride is bound by up gradient, cross gradient, and down gradient
compliance monitoring wells that have a chloroform concentration of <70 pg/L (GWQS = 70 pg/L).
Page 5
Performance Monitor Wells (“PM”) [Wells Exceeding Chloroform Concentrations GWQS of 70[ig/Ll
Seven PM wells still exceed VO^ig/L for the 1st Quarter, 2017: TW4-6, TW4-7, TW4-8, TW4-9, TW4-
10, TW4-29, and TW4-33 with the exception of TW4-16 witch was below 70pg/L (19.1 pg/L) (see
Table 1 below).
Compliance Monitor Wells (“CM”') [Wells with Chloroform Concentrations below 70pg/L]
Six CM wells range with detectable chloroform concentration but still below 70pg/L 1st Quarter, 2017:
TW4-5, TW4-14, TW4-18, TW4-24, TW4-27, and TW4-30.
PM Wells Below the Laboratory Chloroform Detection Limit (<1.0 pg/L)
In the 1st Quarter, 2017 the following monitor wells are below the laboratory detection limit for
chloroform (<1.0 pg/L): MW-32, TW4-3, TW4-12, TW4-13, TW4-23, TW4-28, TW4-31, TW4-32,
TW4-34, TW4-35, TW4-36, and TW4-38.
Pumping Wells
1st Quarter, 2017 pumping wells MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, TW4-20,
TW4-21 TW4-22,TW4-37, and TW4-39 exceed chloroform concentrations of 70pg/L. Pumping well
TW4-24 had detectable chloroform concentration but still below 70pg/L and TW4-25 had non-
detectable chloroform concentrations (<1.0 pg/L).
Nitrate. Nitrate + Nitrite /“nitrate”) Concentrations
Pumping wells TW4-21, TW4-22, and TW4-24, all exceed the nitrate GWQS of 10 mg/1. All of these
nitrate exceedances for these wells appear to be a result of the nitrate contaminant plume up-gradient of
the chloroform contaminant plume. This nitrate contaminant plume is being addressed under the Nitrate
Corrective Action Plan (“NCAP”), approved on December 12, 2012.
Monitor wells TW4-10, TW4-12, TW4-26, TW4-27, and TW4-28, continue to exceeded the nitrate
GWQS of 10 mg/1. TW4-38 also exceeded (10.6 mg/1) the nitrate GWQS. The source of these nitrate
exceedances appear not to be associated with the nitrate plume addressed in the NCAP. The nitrate
source for these wells may be from the same source as the chloroform plume.
TW4-10 is located within the chloroform plume 70 pg/L boundary (1260 pg/L). Both the nitrate and
chloroform concentrations at TW4-10, TW4-12, and TW4-38 are likely to be captured at downgradient
pumping wells MW-4, TW4-2 or TW4-11.
TW4-28 is approximately 235 feet downgradient of TW4-12 and the source of nitrate may not be from
the chloroform plume because they are outside plume boundary with chloroform concentrations of <1.0
pg/L. Because well TW4-32 is approximately 250 feet down gradient of TW4-28 and has a nitrate
concentration below the GWQS of 2.84 mg/L at this time no action is recommended. However, should
future nitrate concentration in TW4-32 increases to above 10 mg/L or has an increasing trend additional
investigations may be recommended.
Page 6
TW4-26 source of nitrate may not be from the chloroform plume because its outside plume boundary
with chloroform concentrations of 46.1 pg/L in the 1st quarter, 2017. Because wells TW4-29 and TW4-
34 are approximately 500 feet down gradient of TW4-26 and have nitrate concentrations below the
GWQS of 2.24 mg/L and 0.67 mg/L respectively in the 1st Quarter, 2017 at this time no action is
recommended. However, should future nitrate concentrations in TW4-29 and TW4-34 increases to
above 10 mg/L or shows increasing trends additional investigations may be recommended.
TW4-27 source of nitrate may not be from the chloroform plume because its outside plume boundary
with a chloroform concentration of 5.3 pg/L in the 1st Quarter, 2017. Because well TW4-31 is
approximately 200 feet down gradient of TW4-27 that has a nitrate concentration below the GWQS of
1.19 mg/L in the 1st Quarter, 2017 at this time no action is recommended. However, should future
nitrate concentrations in TW4-31 increases to above 10 mg/L or shows an increasing trend an additional
investigation may be recommended.
Conclusions on Compliance with the Permit and QAP
Per the Division review it appears that the Report complies with Permit, QAP, and GCAP. Therefore a
letter will be drafted for the Division Director Signature, notifying EFR of the review and closing out of
For the 1st Quarter, 2017 Chloroform Monitoring Report for the chloroform contamination
investigation.
References
EFR Quality Assurance Plan, June 7, 2012 (Revision. 7.2)
EFR issued Ground Water Quality Discharge Permit No. UGW370004. Permit version that was
signed on August 24, 2012.
EFR Groundwater Corrective Action Plan, September 14, 2015 (Revision 0)
EFR, White Mesa Uranium Mill Chloroform Monitoring Report 1st (January through March)
Quarter 2017, May 17, 2017. (DRC-2017-003685)
EFR letter, State of Utah Stipulation and Consent Order (“SCO”) Docket Number UGW-20-01
White Mesa Uranium Mill - Energy Fuels Resources (USA) Inc. (“EFRI”) Notice Pursuant
to Part II.H.l of the Groundwater Corrective Action Plan (“GCAP”) included as
Attachment 1 to the SCO, August 18, 2016. (DRC-2016-009409)
EFR, White Mesa Mill, State of Utah Stipulation and Consent Order (“SCO”) Docket Number
UGW-20-01 Plan and Time Schedule Under Part II.H.2 for Exceedances in TW4-09 in the
Second Quarter of 2016, September 9, 2016. (DRC-2016-010003)
Utah Department of Environmental Quality Division of Radiation Control Guidance for
Groundwater Split Sampling Collection at Uranium Mill Operations, August 7, 2007.
TABLE 1 (1 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(1° mg/L) _______
MW-4 (chloroform
pumping well started pumping
3/4/03)
1st Qtr 3/16/05 NA 2,900 NA NA NA 6 3
2nd Qtr 5/25/05 NA 3,170 NA NA NA 7 1
3rd Qtr 8/31/05 <10 3,500 <10 <10 NA 70
4th Qtr 12/7/05 <50 3,000 <50 <50 53 70
1st Qtr 3/9/06 <50 3,100 <50 <50 49 6 0
2nd Qtr 6/14/06 <50 3,000 <50 <50 49 60
3rd Qtr 7/20/06 <50 2,820 <50 <50 48 1 2
4th Qtr 11/8/06 2 1 2,830 1 4 <1 0 50 64
1st Qtr 2/28/07 1 6 2,300 <1 0 <10 47 6 3
2nd Qtr 6/27/07 1 8 2,000 <1 0 <1 0 45 7 0
3rd Qtr 8/15/07 1 9 2,600 <1 0 <1 0 47 62
4th Qtr 10/10/07 1 7 2,300 <1 0 <1 0 45 6 2
1st Qtr 3/28/08 1 7 2,400 <1 0 <1 0 42 5 8
2nd Qtr 6/25/08 1 8 2,500 <1 0 <1 0 42 6 1
3rd Qtr 9/10/08 1 8 1,800 <1 0 <1 0 35 64
4th Qtr 10/15/08 1 7 2,100 <1 0 <1 0 45 59
1st Qtr 3/4/09 1 5 2,200 <1 0 <1 0 37 5 7
2nd Qtr 6/23/09 1 3 1,800 <1 0 <1 0 34 5 2
3rd Qtr 9/14/09 1 4 2,000 <1 0 <1 0 43 53
4th Qtr 12/14/09 1 6 1,800 <1 0 <1 0 44 58
1st Qtr 2/17/10 1 2 1,600 <1.0 <1 0 45 4 0
2nd Qtr 6/14/10 1 2 2,100 <1 0 <1 0 41 5 1
3rd Qtr 8/6/10 1 5 1,900 <1 0 <1 0 38 4 8
4th Qtr 10/15/10 1 4 1,500 <1 0 <1 0 41 4 9
1st Qtr 2/23/11 15 1,700 <1 0 <1 0 40 4 6
2nd Qtr 6/1/11 1 4 1,700 <1 0 <1 0 35 4 9
3rd Qtr 8/17/11 1 1 1,700 <1 0 <1 0 41 49
4th Qtr 11/16/11 1 3 1,600 <1 0 <1 0 40 5 1
(1)1stQtr 1/23/12 1 1,500 <1 0 <1 0 41 0 4 8
2nd Qtr 6/6/12 1 2 1,400 <1 0 <1 0 39 0 4 9
3rd Qtr 9/4/12 1 5 1,500 <1 0 <1 0 41 0 5 0
4th Qtr 10/4/12 1 1,300 <1 0 <1 0 41 0 4 8
1st Qtr 2/11/13 1 48 1,670
<1 d <1 0 37 8 4 78
2nd Qtr 6/5/13 1 31 1,490 <1 0 <1 0 44 0 4 22
3rd Qtr 9/3/13 1.13 1,520 <1 0 <1 0 41 4 4 89
4th Qtr 10/29/13 5 58 1,410 <1 0 <1 0 40 1 5 25
1st Qtr 1/27/14 .......4 15 1,390 <1 0 <1 0 38 5 4 7
2nd Qtr 5/19/14 5 21 1,390 <1 0 <1 0 39 9 4 08
3rd Qtr 8/11/14 76 1,490 <1 0 <1 0 41 0 37
4th Qtr 10/21/14 <1 0 1,440 <1 0 <1 0 41 5 5 07
’s! Qtr 3/9/15 1 26 ’ 1,400 <1 0 <1 0 40 7 5 75
2nd Qtr 6/8/15 <1 0 1,300 <1 0 <1 0 43 1 2 53
3rd Qtr 8/31/15 <1 0 1,200 1 42 <1 0 44 3 4 79
4th Qtr 10/19/15 <10 1,200 <1 0 <1 0 40 8 4 43
1st Qtr 3/9/16 <1 0 1,240 <10 <1 0 42 2 5 15
2nd Qtr 5/23/16 1 44 1,580 <1 0 <1 0 43 7 4 54
3rd Qtr 7/25/16 <1 0 1,430 <1 0 <1 0 42 5 4 95
4th Qtr 10/12/16 1 24 1,470 <1 0 <10 44 8 4 88
1st Qtr 3/8/17 1 22 1,450 <1 0 <1.0 43 3 4 99
MW-4A(TW4-A)
1st Qtr 3/16/05 NA 3,700 NA NA NA 7 1
2nd Qtr 5/25/05 NA 3,740 NA NA NA 78
3rd Qtr 8/31/05 <10 3,800 <10 <10 NA 69
4th Qtr 12/7/05 <50 3,000 <50 <50 55 67
1st Qtr 3/9/06 <50 3,700 <50 <50 53 58
2nd Qtr 6/14/06 <50 3,300 <50 <50 54 7 3
3rd Qtr 7/20/05 <50 3,190 <50 <50 54 1 2
4th Qtr 11/8/05 24 3,370 <1 0 <1 0 54 7 1
1st Qtr 2/28/07............1 9 2,500 <1 d <1 0 60 7 1
Well abandonded
(1) As of March 2012 both north and south wild life ponds no longer receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (2 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
□USA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mq/L)
MW-26 (former TW4-15)
Chloroform pumping well started
8/8/03
IstQtr 3/16/05 NA 310 NA NA NA 03
2nd Qtr 5/25/05 NA 442 NA NA NA 0 2
3rd Qtr 8/31/05 <5 0 960 54 <5 0 NA 02
4th Qtr 12/7/05 <50 1,000 <50 <50 55 03
1st Qtr 3/9/06 <50 1,100 <50 <50 52 0 2
2nd Qtr 6/14/06 <50 830 <50 <50 52 02
3rd Qtr 7/20/06 <50 2,170 <50 <50 65 1 4
4th Qtr 11/8/06 <1 0 282 <1 0 2 6 54 0 3
IstQtr 2/28/07 <1 0 570 <1 0 ........5 5 56 0 6
2nd Qtr 6/27/07 <1 0 300 <1 0 13 49 04
3rd Qtr 8/15/07 <1 0 1,400 <1 0 36 57 1
4th Qtr 10/10/07 <1 0 2,000 <1 0 14 57 06
1st Qtr 3/28/08 <1 0 930 <1 0 .........40 49 0.1
2nd Qtr 6/25/08 <1 0 1,300 <1 0 53 57 06
3rd Qtr 9/10/08 <1 0 630 <1 0 24 44 02
4th Qtr 10/15/08 NA NA NA NA 64 0 1
11/18/08 <2 0 1,700 <2 0 100 NA NA
1st Qtr 3/4/09 <1 0 950 <1 0 51 49 0 4
2nd Qtr 6/23/09 <1 0 410 <1 0 12 48 02
3rd Qtr 9/14/09 <1 0 850 <1 0 30 46 0 1
4th Qtr 12/14/09 <1 0 1,100 <1 0 40 60 23
1st Qtr 2/17/10 <1 0 730 <1 0 ”.......19 57 0.2
2nd Qtr 6/14/10 1.2 1,600 <1 0 <1 0 40 68
3rd Qtr 8/16/10 <1 0 2,200 <1 0 21 49 06
4th Qtr 10/15/10 <1 0 970 <1 0 6 5 65 07
1st Qtr 2/23/11 <1 0 450 <1 0 .....................................3 6 57 0 5
2nd Qtr 5/31/11 <1 0 1,800 <1 0 1 3 88 04
3rd Qtr 8/17/11 <1 0 720 <1.0 7 2 58 0 9
4th Qtr 11/16/11 NA NA NA .....................................NA 69 20
(1)12/5/11 <1 0 1,800 <1 0 29 NA NA
(2)1 st Qtr 2/7/12 <1 o.............2,400 <1 0 16 98 1 7
2nd Qtr 6/6/12 <1 0 3,000 <1 0 21 73 2 5
3rd Qtr 9/4/12 <1 3,100 <1 ............31 73 26
4th Qtr 10/4/12 <1 1,200 <1 4 68 1 8
IstQtr 2/11/13 <1 2,120 <1 ...............................934 ' 81 9 2 27
2nd Qtr 6/5/13 <1 0 4,030 <1 0 52 4 77 9 2 11
3rd Qtr 9/3/13 <1 0 2,940 <1 0 33 2 60 5 1 18
4th Qtr 10/29/13 <1 0 1,410 <1 ’4 03
.
72 3 1 38
IstQtr 1/27/14 <1 0 1,400 <1 0 59 4 0 55
2nd Qtr 5/19/14 <1 0 1,960 <1 0 154 53 4 0 93
3rd Qtr 8/11 /14 <1 0 2,120 87 .............................26 59 07
4th Qtr 10/21/14 <1 0 2,090 <1.0 23 2 60 1 0 93
1st Qtr 3/9/15 <10 1,980 <1 0 "27 4 56 5 0 73
2nd Qtr 6/8/15 <1 0 1,980 <1 0 11 2 62 0 42
3rd Qtr 8/31/15 <1 0 2,350 4 05 11 6 69 6 0 68
4th Qtr 10/19/15 <1 0 2,680 1 32 8 28 62 6 0 991
1st Qtr 3/9/16 <1 0 2,650 <1 0 4 66 68 3 1 45
2nd Qtr 5/23/16 <1 0 2,220 <1 0 4 57 66 2 1 12
3rd Qtr 7/25/16 <1 0 3,190 <1 0 7 81 66 4 1 57
4th Qtr 10/12/16 <1 0 2,510 <1 0 4 31 66 2 1 18
Ist Qtr 3/8/17 <1 0 1,290 <1 0 7 65 "58 4 0 768
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild Irfe ponds no longer receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (3 Of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
MW-32 (former TW4-17)
1st Qtr 3/16/05 NA <1 0 NA NA NA <0 1
2nd Qtr 5/25/05 NA <1 0 NA NA NA <0 1
3rd Qtr 8/31/05 <1 0 <1 0 32 <1 0 NA <0 1
4th Qtr 12/7/05 <1 0 <1 0 <1 0 <1 0 33 <0 1
1st Qtr 3/9/06 <1 0 <1 0 <1 0 <1 0 32 <b i
2nd Qtr 6/14/06 <1 0 <1 0 3 5 <1 0 30 <0 1
3rd Qtr 7/20/06 <1 0 <1 0 1 8 <1 0 32 <1 0
4th Qtr 11/8/06 <1 0 <1 0 1 5 <1 0 31 < 1
1st Qtr 2/28/07 <1 0 <1 0 <1 0 <1 0 32 <1 o '
2nd Qtr 6/27/07 <1 0 <1 0 <1 0 <1 0 32 <1 0
3rd Qtr 8/15/07 <1 0 <1.0 <1 0 <1 0 31 <1 0
4th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 32 <1 0
1st Qtr 3/28/08 <1.0 <1 0 <1 0 <1 0 31 <i'
2nd Qtr 6/25/08 <1.0 <1 0 <1 0 <1 0 29 <1.0
3rd Qtr 9/10/08 <1 0 <1 0 <1.0 <1 0 30 <1 0
4th Qtr 10/15/08 <1 0 <1 0 <1 0 <1 0 26 <0 05
1st Qtr 3/4/09 <1 0 <1 b <1 0 <1 0 30 < 1
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 31 <0 1
3rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 33 <0 1
4th Qtr 12/16/09 <1 0 <1 0 <1 0 <1 0 35 <0 11 st Qtr 2/17/10 '<1 0 <1 0 <10 <1 0 38 <0 l "
2nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 32 <0 1
3rd Qtr 8/16/10 <1 0 <1 0 <1 0 <1 0 28 <0 1
4th Qtr 10/15/10 <1 0 <1 0 <1 0 <1 0 24 <0 1
1st Qtr 2/23/11 <10 <1 0 <1 0 <1 0 40 <0 1
2nd Qtr 5/25/11 <1 0 <1 0 <1 0 <1 0 31 <0 1
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 33 <0 1
4th Qtr 11/16/11 NA NA NA NA 32 <0 1
1,112/7/11 <1 0 <1 0 <1 0 <1 0 NA NA
(2)1 st Qtr 1/18/12 <1 0 <1 0 <1 0 <1 0 21 <6.1
2nd Qtr 6/22/12 <1 0 <1 0 <1.0 <1 0 32 <0 1
3rd Qtr 9/5/12 <1 0 <1 0 <1 0 <1 0 33 <0.1
4th Qtr 10/10/12 <1 0 <10 <1 0 <1 0 35 <0 1
1st Qtr 2/11/13 <1 0 <1 0 <1.0 <1 0 34 3 <0 1 '
2nd Qtr 6/18/13 <1 0 <1 0 <1 0 <1 0 34 9 <0 1
3rd Qtr 9/3/13 <1 0 <1 0 <1 0 <1 0 33 <0 1
4th Qtr 10/29/13 <1 0 <1 0 <1.0 <1 0 35 7 <0 11st Qtr 1/29/14'<1 0 <1 0 <1 0 <10 34 <0 1
2nd Qtr 5/23/14 <1 0 <1 0 <1 0 <1 0 397 <0 1
3rd Qtr 8/26 /14 <1 0 <1 0 <1 0 <1 0 34 <0 14th Qtr 10/29/14 <1 0 <1 0 <1 0 <1 0 34 9 <0 1
1st Qtr 3/17/15 <1 0 <10.............<1 0 <1 0 36 3 <0 12nd Qtr 6/11/15 <1 0 <1 0 <1 0 <1 0 35 8 <0 13rd Qtr 9/9/15 <1 0 <1 0 <1 0 <1 0 37 7 <0 14th Qtr 10/28/15 <1 0 <1 0 <1 0 <1 0 34 7 <0 11st Qtr 3/22/16 <1 0 <1 0 <1 0 <1 0 36.7 <0 1Duplicate TW4-70 <1 0 <1 0 <1 0 <1 0 37 7 0 119
2nd Qtr 6/8/16 <1 0 <1 0 <1 0 <1 0 36 4 <0 1Duplicate TW4-70 <1 0 <1 0 <1 0 <1 0 37 7 <0 13rd Qtr 8/19/16 <1 0 <1 0 <1 0 <1 0 35.7 <0 1
4th Qtr 10/31/16 <1 0 <1 0 <1 0 <1 0 36 9 <0 11st Qtr 3/21/17 <1 0 <1 0 <i o <1 0 33 7 <0 1
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (4 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-1 (chloroform pumping
well started m 1/14/15)
IstQtr 3/16/05 NA 2,700 NA NA NA 9 1
2nd Qtr 5/25/05 NA 3,080 NA NA NA 106
3rd Qtr 8/31/05 <10 2,900 <10 <10 NA 9 8
4th Qtr 12/7/05 <50 2,400 <50 <50 52 97
1st Qtr 3/9/06 <50 2,700 <50 <50 49 94
2nd Qtr 6/14/06 <50 2,200 <50 <50 48 96
3rd Qtr 7/20/06 <50 2,840 <50 <50 51
4th Qtr 11/8/06 1 4 2,260 <1 0 <1 0 47 92
1st Qtr 2/28/07 1 2 1,900 <1 0 <1 0 47 8 9
2nd Qtr 6/27/07 1 4 1,900 <1 0 <1 0 45 9
3rd Qtr 8/15/07 1 3 2,300 <1 0 <1 0 43 84
4th Qtr 10/10/07 1 3 2,000 <1 0 <1 0 43 78
'1st Qtr 3/28/08 1 3 2,000 <1 0 <1 0 39 7 6
2nd Qtr 6/25/08 11 1,900 <1 0 <1 0 39 8 68
3rd Qtr 9/10/08 1 3 1,700 <1 0 <1 0 35 8 15
4th Qtr 10/15/08 1 3 1,700 <1 0 <1 0 41 9 3
IstQtr 3/11/09 11 1,700 <1 0 <1 0 37 7 5
2nd Qtr 6/23/09 1 1,500 <1 0 <1 0 37 6 9
3rd Qtr 9/14/09 <1 0 1,700 <1 0 <1 0 36 7 3
4th Qtr 12/29/09 <1 0 1,400 <1 0 <1 0 41 68
1st Qtr 3/3/10 <1 0 i.iioo <1 0 <1 0 35 7 1
2nd Qtr 6/14/10 12 1,600 <1 0 <1 0 40 68
3rd Qtr 8/18/10 1 1,600 <1 0 <1 0 35 67
4th Qtr 10/15/10 <1 0 1,500 <1 0 <10 40 66
IstQtr 2/24/11 <10 1,300 <1 0 <10 41 6 6
2nd Qtr 6/1/11 <1 0 1,200 <1 0 <1 0 35 66
3rd Qtr 8/18/11 <1 0 1,300 <1 0 <1 0 36 68
4th Qtr 11/29/11 <1 0 1,500 <1 0 <1 0 40 66
(1)ist Qtr i/24/12 <1 0 1,300 <1 0 <1 0 38 6 8
2nd Qtr 6/14/12 <1 0 1,000 <1 0 <1 0 42 7 1
3rd Qtr 9/28/12 <1.0 1,000 <1 0 <1 0 39 50
4th Qtr 10/4/12 <1 0 1,100 <1 0 <1 0 40 6 5
1st Qtr 2/13/13 3 66 1,320 <1 0 <1 0 37 6 ' 6 99
2nd Qtr 6/19/13 <1 0 1,100 <1 0 <1 0 39 1 6 87
3rd Qtr 9/3/13 <1 0 1,150 <1 0 <1 0 37 6 7 12
4th Qtr 11/14/13 <1 0 1,280 <1.0.<1 0 36 5 7 08
IstQtr 2/5/14 5 47 1,090 <1 0 <1 0 38 9 7 74
2nd Qtr 5/23/14 4 77 1,020 <1 0 <1 0 37 4 6 93
3rd Qtr 8/27/14 <1 0 845 1 4 <1 0 38 4 80
4th Qtr 10/29/14 <1 0 1,140 <1 0 <1 0 38 7 6 31
(2)1st Qtr 3/9/15 <1 0 1,130 <1 0 <1 0 38 3 7 06
2nd Qtr 6/8/15 <1 0 1,260 <1 0 <1 0 40 3 6 07
3rd Qtr 8/31/15 <1 0 1,060 <1 0 <1 0 45 9 6 28
4th Qtr 10/19/15 <1 0 1,040 <1 0 <1 0 38 5 1 55
IstQtr 3/9/16 <1 0 974 <1 0 <1 0 41 7 0 148
2nd Qtr 5/23/16 <1 0 1,140 <1 0 <1 0 44 4 0 138
3rd Qtr 7/25/16 <1 0 1.160 <1 0 <1 0 44 7 5 49
4th Qtr 10/13/16 <1 0 1,330 <1 0 <1 0 44 2 0 746
1st Qtr 3/8/17 <1 0 ’ 519 <1 0 <1 0 41 5 4 440
(V) _AsofMarch 20J_2^^£(^h^nd£omrnvi|djife_pon£s no longer receiving water
0_chloroforrnj)um£inc) well, startedjn 1/14/15_____
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (5 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pq/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pq/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-2 (chloroform pumping
well starting 1/14/15)
1st Qtr 3/16/05 NA 3,700 NA NA NA 77
2nd Qtr 5/25/05 NA 3,750 NA NA NA 86
3rd Qtr 8/31/05 <10 3,900 <10 <10 NA 8 0
4th Qtr 12/7/05 <50 3,500 <50 <50 56 78
1st Qtr 3/9/06 <50 3,800 <50 <50 56 7 5
2nd Qtr 6/14/06 <50 3,200 <50 <50 56 7 1
3rd Qtr 7/20/06 <50 4,120 <50 <50 54 74
4th Qtr 11/8/06 2.3 3,420 <1 0 <1 0 55 76
1st Qtr 2/28/07 1 8 2,300 <1 0 <1 0 54 7 3
2nd Qtr 6/27/07 2 5 3,000 <1 0 <1 0 50 7 8
3rd Qtr 8/15/07 22 340 (7)<1 0 <1 0 49 73
4th Qtr 10/10/07 2 1 3,200 <1 0 <1 0 51 69
1st Qtr 3/28/08 23 3,300 <1 0 <1 0 48 6 9
2nd Qtr 6/25/08 22 3,100 <1 0 <1 0 46 74
3rd Qtr 9/10/08 24 2,800 <1 0 <1 0 42 7 1
4th Qtr 10/15/08 NA NA NA NA 47 80
11/18/08 24 3,200 <2 0 <2 0 NA NA
1st Qtr 3/11/09 2 2 , 3,100 <1 0 <1 0 46 6 5
2nd Qtr 6/23/09 2 2,800 <1 0 <1 0 44 64
3rd Qtr 9/14/09 2 3,000 <1 0 <1 0 43 66
4th Qtr 12/29/09 2 1,600 <1 0 <1 0 46 64
1st Qtr 3/3/10 2 2,600 <1 0 <1 0 42 6 8
2nd Qtr 6/14/10 26 3,300 <1 0 <1 0 43 87
3rd Qtr 8/18/10 2 5 3,300 <1 0 <1 0 43 66
4th Qtr 10/15/10 2 1 3,000 <1 0 <1 0 41 65
1st Qtr 2/24/11 24 3,100 <10 <1 0 46 7 0
2nd Qtr 6/2/11 2 2 3,000 <1 0 <1 0 42 68
3rd Qtr 8/17/11 1 6 2,400 <1 0 <1 0 48 60
4th Qtr 11/29/11 2 8 3,900 <1 0 <1 0 49 70
(1)1st Qtr 1/24/12 2 2,500 <1 0 <1 0 49 7 1
2nd Qtr 6/14/12 2 1 2,500 <1.0 <1 0 52 7.7
3rd Qtr 9/28/12 1 8 2,900 <1 0 <1.0 76 4.0
4th Qtr 10/4/12 ..2 3,100 <1 0 <1 0 49 76
1st Qtr 2/13/13'...................... 5 17'3,580 <1 0 <1 0 46 8 1
2nd Qtr 6/19/13 2 65 3,110 2 <1 0 46 9 7 51
3rd Qtr 9/3/13 241 3,480 <1 0 <1 0 44.9 9 3
4th Qtr H/14/13 315 3,740 <1 0 <1 0 43 9 8 39
1st Qtr 2/6/14 7 1 3,180 <1 0 <1 0 45 9 7.87
2nd Qtr 5/23/14 6 05 2,930 <1 0 <1 0 45 4 9 11
3rd Qtr 8/27/14 1 4 3,170 36 <1.0 45 6.2
4th Qtr 10/30/14 26 3,580 <1 0 <1.0 45 5 8 45
(2)1 st Qtr 3/9/15 1 44 1,840 <1 0 <1 0 44 9 5 32
2nd Qtr 6/8/15 <1 0 1,650 <1 0 <1 0 48 1 4 3
3rd Qtr 8/31/15 <1 0 1,060 26 <1 0 50 3 76
4th Qtr 10/19/15 26 2,070 <1 0 <1 0 41 9 5 18
1st Qtr 3/9/16 1 2 1,970 <1 0 <1 0 43 4 5 30
2nd Qtr 5/23/16 1 49 2,070 <1 0 <1 0 43.8 5 67
3rd Qtr 7/25/16 <1 0 1,780 <1 0 <1 0 42 9 4 07
4th Qtr 10/12/16 <1.0 1,600 <1 0 <1 0 44 3 6 07
1st Qtr 3/8/17 <10 1,570 <1 0 <1 0 43.1 4 74
_Asof_Marcii M22^t^h_north_and_soLjth_wil_d_hfepond_s no longer receiving water
0£hlorofofTnpurn£inj wel^ st_arted_in_in 4m________
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (6 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-3
1st Qtr 3/16/05 NA <1 0 NA NA NA 35
2nd Qtr 5/25/05 NA <1.0 NA NA NA 37
3rd Qtr 8/31/05 stl 0 <1 0 64 <1 0 NA 35
4th Qtr 12/7/05 >=1 0 <1 0 <1 0 <1 0 26 33
1st Qtr 3/9/06 d 0 <1 0 23 <1 0 26 3 3
2nd Qtr 6/14/06 <1 0 <1 0 1 6 <1 0 26 7 1
3rd Qtr 7/20/06 0 <1 0 22 <1 0 26 2 9
4th Qtr 11/8/06 <1 0 <1 0 <1 0 <1.0 23 1 5
1st Qtr 2/28/07 ■T1 0 <1 0 <1 0 <1 0 22 3 1
2nd Qtr 6/27/07 0 <1 0 <1 0 <1 0 23 3 3
3rd Qtr 8/15/07 <1 0 <1 0 <1 0 <1 0 24 3 1
4th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 27 28
1st Qtr 3/28/08 ■rl 0 <1 0 <1 0 <1 0 21 2 8
2nd Qtr 6/25/08 <1 0 <1 0 <1 0 <1 0 19 29
3rd Qtr 9/10/08 *1 0 <1 0 <1 0 <1 0 19 27
4th Qtr 10/15/08 d 0 <1 0 <1 0 <1 0 22 2 6
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <1 0 21 2 5
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 20 29
3rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 21 28
4th Qtr 12/29/09 <1 0 <1 0 <1 0 <1 0 22 26
1st Qtr 2/23/10 <1 0 <1 0 <1 0 <1 0 23 2 8
2nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 24 30
3rd Qtr 8/10/10 <1 0 <1 0 <1 0 <1 0 22 3 1
4th Qtr 10/15/10 <1 0 <1 0 <1 0 <1 0 26 3 3
1st Qtr 2/15/11 *1 0 <1 0 <1 0 <1 0 23 3 5
2nd Qtr 5/25/11 <1 0 <1 0 <1 0 <1 0 23 37
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 23 4 0
4th Qtr 11/14/11 <1 0 <1 0 <1 0 <1 0 23 44
(1)1st Qtr 1/17/12 <1 0 <1 0 <1 0 <1 0 21 7 1
2nd Qtr 5/31/12 <1 0 <1 0 <1 0 <1 0 24 44
3rd Qtr 8/29/12 <1 0 <1 0 <1 0 <1 0 25 4 9
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 25 4 8
1st Qtr 2/7/13 <1 0 <1 0 <1 0 <1 0 '23 7 5 05
2nd Qtr 6/29/13 <1 0 <1 0 <1 0 <1 0 23 8 5 83
3rd Qtr 9/3/13 <1 0 <1 0 <1 0 <1 0 25 4 90
4th Qtr 11/6/13 <1 0 <1 0 <1 0 <1 0 24 1 5 89
1st Qtr 1/22/14 <1 0 <1 0 <1 0 <1 0 24 9 6 66
2nd Qtr 5/21/14 <1 0 <1 0 <1 0 <1 0 24.4 6 01
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 26 5 30
4th Qtr 10/23/14 <1 0 <1 0 <1 0.<1 0 26 7 6 07
1st Qtr 3/11/15 <1 0 <1 0 <1 0 <1.0 26 2 6 64
2nd Qtr 6/10/15 *1 0 <1 0 <1 0 <1 0 27 5 5 71
Duplicate TW4-65 <1 0 <1 0 <1 0 <1 0 27 5 3 94
3rd Qtr 8/13/15 <1 0 <1 0 <1 0 <1 0 27 4 3 88
4th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 25 6 5 37
1st Qtr 3/15/16 <1 0 <1.0 <1 0 <1 0 32 8 5 83
2nd Qtr 5/25/16 <1 0 <1 0 <1 0 <1 0 27 9 5 65
3rd Qtr 7/27/16 <1 0 <1 0 <1 0 <1 0 26 5 6 10
4th Qtr 10/19/16 <1 0 <1 0 <1 0 <1 0 29 5 6 00
1st Qtr 3/14/17 <1 0 <10 <1 0 ......................<1 0 28 1 6 18
ll) March 201_2_both nojlhand^south wildJife_ponds_noJonger receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (7 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-4 (chloroform pumping
well stared in 1st qtr 2010)
1st Qtr 3/16/05 NA 3,100 NA NA NA 10V0
2nd Qtr 5/25/05 NA 2,400 NA NA NA 11 3
3rd Qtr 8/31/05 <10 3,200 <10 <10 NA 9 9
4th Qtr 12/7/05 <50 2,800 <50 <50 54 102
1st Qtr 3/9/06 <50 2,900 <50 <50 51 9 5
2nd Qtr 6/14/06 <50 2,600 <50 <50 48 86
3rd Qtr 7/20/06 <50 2,850 <50 <50 50 97
4th Qtr 11/8/06 1 7 2,670 <1 0 <1 0 49 10 1
1st Qtr 2/28/07 1 5 2,200 <1 0 <1 0 49 9 0
2nd Qtr 6/27/07 1 7 2,400 <1 0 <1 0 47 94
3rd Qtr 8/15/07 1 5 2,700 <1 0 <1 0 45 95
4th Qtr 10/10/07 1.5 2,500 <1 0 <1 o 47 9 5
1st Qtr 3/28/08 1 6 2,800 <1 0 <1 0 43 "92
2nd Qtr 6/25/08 1 5 2,500 <1 0 <1 0 42 10 8
3rd Qtr 9/10/08 1 4 2,200 <1 0 <1 0 39 8 8
4th Qtr 10/15/08 NA NA NA NA 44 io T
4th Qtr 11/18/09 <2 0 2,500 <2 0 <2 0 NA NA
i st Qtr 3/4/09 1 2 2,200 <1 0 <1.0 37 102
2nd Qtr 6/23/09 1 2 1,800 <1 0 <1 0 34 82
3rd Qtr 9/14/09 1 1 2,000 <1 0 <1 0 39 84
4th Qtr 12/29/09 1 1 '950 <1 0 <1 0 41 76
(2)1 st Qtr 2/17/10 1 1,700 <1 0 <1 0 48 66
2nd Qtr 6/14/10 1 2 1,700 <1 0 <1 0 35 76
3rd Qtr 8/10/10 1 3 2,100 <1 0 <1.0 36 7 3
4th Qtr 10/15/10 1 3 1,700 <1 0 <1 0 38 7 1
1st Qtr 2/23/11 1 4 1,800 <1 0 <1 0 41 7 0
2nd Qtr 6/1/11 1 2 1,700 <1 0 <1 0 35 7 0
3rd Qtr 8/17/11 <1 0 1,500 <1 0 <1 0 40 66
4th Qtr 11/16/11 1 1,500 <1 0 <1 0 39 7 0
(1)1 st Qtr 1/23/12 <1 0 1,200 <1 0 <1 0 38 7 1
2nd Qtr 6/6/12 <1 0 1,500 <1 0 <1 0 43 7 1
3rd Qtr 9/4/12 1 2 1,600 <1 0 <1 0 39 7 1
4th Qtr 10/3/12 1 1,400 <1 0 <1 0 38 70
1st Qtr 2/11/13 1 1,460 <10 <10 39 7 36
2nd Qtr 6/29/13 <1 0 1,330 <1 0 <1 0 39 6 6 30
3rd Qtr 9/3/13 1 2 1,380 <1 0 <1 0 38 8 7 22
4th Qtr 10/3/13 5 3 1,360 <1 0 <1 0 439 7 84
1st Qtr 1/27/14 3 88 1,260 <1 0 <1 0 ' '37 4 7 28
2nd Qtr 5/19/14 4 94 1,220 <1 0 <1 0 47 5 5 91
3rd Qtr 8/11/14 4 94 1,320 7 1 <1 0 40 53
4th Qtr 10/21/14 <1 0 1,130 <1 0 <1 0 40 7 02
1st Qtr 3/9/15 1 05 1,350 <1 0 <1 0 37 6 7 7
2nd Qtr 6/10/15 <1 0 1,280 <1 0 <1 0 41 3 6 33
3rd Qtr 8/31/15 <1 0 1,220 1 72 <1 0 45.8 6 45
4th Qtr 10/19/15 <1 0 1,190 <1 0 <1 0 38 5 6 27
i st Qtr 3/9/16 <1 0 1,190 <1 0 <1 0 39 7 67
2nd Qtr 5/23/16 1 21 1,780 <1 0 <1 0 41 9 6 56
3rd Qtr 7/27/16 <1 0 1,380 <1 0 <1 0 40 2 7 22
4th Qtr 10/13/16 <1 0 V30 <1.0 <1 0 40 3 6 77
'1st Qtr 3/8/17 <1 0 1,290 <Yb"<10 41.7 6 87
(2) Aso^M^r^ no longer receiving water
0<Chlorofom2|Dumpinqwell stareO_in_1 st3^2010J_
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (8 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
_______(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-5
1st Qtr 3/16/05 NA 120 NA NA NA 4 9
2nd Qtr 5/25/05 NA 113 NA NA NA 37
3rd Qtr 8/31/05 <2.5 82 5 8 <2 5 NA 6 0
4th Qtr 12/7/05 <2 5 63 25 <2 5 56 6 0
1st Qtr 3/9/06 <2 5 66 3 1 <2 5 52 6 0
2nd Qtr 6/14/06 <2 5 51 3 1 <2 5 51 59
3rd Qtr 7/20/06 <1 0 53 7 <1 0 <1 0 54 67
4th Qtr 11/8/06 <1 0 47 1 <1 0 <1 0 55 29
1st Qtr 2/28/07 <1 0 35 <1 0 <1 0 57 7 8
2nd Qtr 6/27/07 <1 0 26 <1 0 <1 0 45 70
3rd Qtr 8/15/07 <1 0 92 <1 0 <1 0 38 77
4th Qtr 10/10/07 <1 0 94 <1 0 <1 0 39 8 2
1st Qtr 3/28/08 <1 0 ii <1 0 <1 0 36 74
2nd Qtr 6/25/08 <1 0 9 3 <1 0 <1 0 37 8 7
3rd Qtr 9/10/08 <1 0 11 <1 0 <1 0 34 7 9
4th Qtr 10/15/08 <1 0 10 <1 0 <1 0 37 93
1st Qtr 3/4/09 <1 0 12 <1 0 <1 0 34 7 9
2nd Qtr 6/23/09 <1 0 13 <1 0 <1 0 37 7 5
3rd Qtr 9/14/09 <1 0 12 <1 0 <1 0 48 8.3
4th Qtr 12/29/09 <1 0 8 5 <1 0 <1 0 41 7 5
1st Qtr 2/25/10 <1 0 13 <1 0 <10 43 6.8
2nd Qtr 6/14/10 <1 0 12 <1 0 <1 0 28 7 1
3rd Qtr 8/11/10 <1 0 12 <1 0 <1 0 38 70
4th Qtr 10/15/10 <10 11 <1 0 <1 0 41 72
1st Qtr 2/22/11 <1 0 10 <1 0 <1 0 34 7 0
2nd Qtr 5/26/11 <1 0 9 <1 0 <1.0 35 72
3rd Qtr 8/7/11 <1 0 10 <1 0 <1.0 37 75
4th Qtr 11/16/11 NA NA NA NA 30 60
n) 12/7/11 <1 0 79 <1 0 <1 0 NA NA
(2)1st Qtr 1/18/12 <1 0 ..............7 6 <1 0 <1 0 22 5 8
2nd Qtr 6/6/12 <1 0 84 <1 0 <1 0 39 8 0
3rd Qtr 9/11/12 <1 0 12 <1 0 <1 0 37 8 1
4th Qtr 10/3/12 <1 0 8 <1 0 <1 0 38 77
1st Qtr 2/13/13 <1 0 108 <10 <1 0 '34 3 8 24
2nd Qtr 6/13/13 <1 0 11 2 <1 0 <1 0 36 5 10 70
3rd Qtr 9/5/13 <1 0 11 6 <1 0 <1 0 39 1 7 79
4th Qtr 11/13/13 <1 0 14 4 <10................<1 0 41 1 7 75
1st Qtr 1/30/14 <10.....................12 5 <1 0 <1 0 40 5 9 16
2nd Qtr 5/22/14 <1 0 134 <1.0 <1 0 51 4 7 78
3rd Qtr 8/14/14 <1 0 120 <1 0 <1 0 44 72
4th Qtr 11/13/14 <1 0 14 6 <1 0 <1 0 45 1 8 31
1st Qtr 3/12/15 <1 0 138 <10 <1 o"........................45 1 9 32
Duplicate TW4-70 <1 0 138 <1 0 <1 0 46 4 881
2nd Qtr 6/10/15 <1 0 13 3 1 07 <1 0 47 3 7 08
3rd Qtr 9/3/15 <1 0 129 <1.0 <1 0 52 2 8 1
4th Qtr 10/28/15 <1.0 11 <1.0 <1 0 43 6 8 03
1st Qtr 3/17/16 <l"o............11 <10 <1 0 44 7 10 2
2nd Qtr 5/23/16 <1 0 14 <1 0 <1 0 45 9 ' 8 98
3rd Qtr 8/3/16 <1 0 11 <1 0 <1 0 44 6 8 49
4th Qtr 10/26/16 <1 0 99 <1 0 <1 0 47 8 8 32
Duplicate TW4-75 <1 0 120 <1 0 <1 0 49 5 8 34
1st Qtr 3/15/17 <1*0.......................12 6 <10 <1 0 '44.7 8 49
(1) VOCs were resampled because laboratory missed holding time
(2) As_of_March 20J_2^i^h^ortt^^£O£th^dJ^e_pon£sj2Ojonger receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (9 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-6
1st Qtr 3/16/05 NA <1 0 NA NA NA 0.2
2nd Qtr 5/25/05 NA 2 5 NA NA NA 04
3rd Qtr 8/31/05 <1 0 10 28 <1 0 NA 08
4th Qtr 12/7/05 <1 0 17 1 3 <1 0 32 09
1st Qtr 3/9/06 <1 0 31 <1 0 <1 0 31 12
2nd Qtr 6/14/06 <1 0 19 <1 0 <1 0 30 1 0
3rd Qtr 7/20/06 <1 0 11 <1 0 <1 0 37 06
4th Qtr 11/8/06 <1 0 42 8 <1 0 <1 0 65 1 4
1st Qtr 2/28/07 <1 0 46 <1 0 <1 0 32 1 8
2nd Qtr 6/27/07 <1 0 11 <1.0 <1 0 38 06
3rd Qtr 8/15/07 <1 0 18 <1 0 <1 0 36 07
4th Qtr 10/10/07 <1 0 18 <1.0 <1 0 35 08
1st Qtr 3/28/08 <1 0 52 <1 0 <1 0 33 1 i
2nd Qtr 6/25/08 <1 0 24 <1 0 <1 0 35 09
3rd Qtr 9/10/08 <1 0 39 <1 0 <1 0 35 1 1
4th Qtr 10/15/08 <1 0 37 <1 0 <1 0 33 1 0
1st Qtr 3/11/09 <1 0 81 <1 0 <1 0 35 2 2
2nd Qtr 6/23/09 <1 0 120 <1 0 <1 0 37 27
3rd Qtr 9/14/09 <1 0 280 <1 b <1 0 37 50
4th Qtr 12/29/09 <1 0 250 <1 0 <1 0 41 6 1
(5)1 St Qtr 2/25/10 <1 0 1000 <1 0 <1 0 45 1 8
2nd Qtr 6/14/10 <1 0 590 <1 0 <1 0 33 25
3rd Qtr 8/11/10 <1 0 630 <1 0 <1 0 31 39
4th Qtr 10/15/10 <1 0 420 <1 0 <1 0 41 4 3
1st Qtr 2/23/11 <1 0 47 <1 0 <1 o....40 0 7
2nd Qtr 5/26/11 <1 0 96 <1 0 <1 0 42 03
3rd Qtr 8/17/11 <1 0 16 <1 0 <1 0 39 0 3
4th Qtr 11/16/11 NA NA NA NA 36 08
11112/7/11 <1 0 21 <1 0 <1.0 NA NA
(2> 11/16/11 <1 °50 <1 0 <1.0 33 0.8
(4)1st Qtr 1/18/12 <1 0 38 <i 0 <1 0 38 07
2nd Qtr 6/13/12 <1 0 47 <1 0 <1 0 40 02
3rd Qtr 9/11/12 <1 0 69 <1 0 <1 0 21 0 1
4th Qtr 10/3/12 <1 0 9 <1 0 <1 0 41 02
1st Qtr 2/13/13 <1 0 6 89 <1 0 <1 0 40 4 02
2nd Qtr 6/13/13 <1 0 4 86 <1 0 <1 0 37 9 02
3rd Qtr 9/5/13 <1 0 5 93 <1 0 <1 0 40 6 02
4th Qtr 11/13/13 <1 0 5 51 <1 0 <1 0 40 2 1 5
1st Qtr 1/29/14 <1 0 57 <1 0 <1 0 40 6 0 2
2nd Qtr 5/22/14 <1 0 103 <1 0 <1 0 37 03
3rd Qtr 8/14/14 <1 0 202 <1 0 <1 0 40 42
|3)3rd Qtr 9/24/14 <1 0 260 <1 0 <1 0 NA NA
4th Qtr 10/29/14 <1 0 723 <1 0 <1 0 41 1 69
1st Qtr 3/12/15 <1 0 1,180 <1 0 <1 0 41 2 5 3
2nd Qtr 6/10/15 <1 0 1,040 <1 0 <1 0 41 6 59
3rd Qtr 9/10/15 <1 0 1,040 <1 0 <1 0 47 68
4th Qtr 10/29/15 <1 0 843 <1 0 <1 0 40 2 56
1st Qtr 3/22/16 <1 0 834 <1 0 <1 0 42 3 6 79
2nd Qtr 6/8/16 <1 0 486 <1 0 <1 0 44 1 3 19
3rd Qtr 7/27/16 <1 0 433 <1 0 <1 0 42 2 3 85
4th Qtr 10/26/16 <1 0 301 <1 0 <1 0 46 1 3 74
1st Qtr 3/16/17 <10 288 <1 0 <10 42 1 3 15
(1) VOCs were resampled because laboratory missed holding time
(2) Results of the TW4-70 the duplicate sample for TW4-6
(3) Reanalyzed for VOCs only
(4) _Asof_March 20J2^<^hji(^f^^^o^thwildjrfeponds no longer receiving water
0_Chloroform_^umping_we|| TW4-4 located appoximately 3stared in 1st qtr 2010)
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (10 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-7
1st Qtr 3/16/05 NA 3,100 NA NA NA 52
2nd Qtr 5/25/05 NA 2,700 NA NA NA 54
3rd Qtr 8/31/05 <10 3,100 <10 <10 NA 52
4th Qtr 12/7/05 <50 2,500 <50 <50 52 5 31 stQir 3/9/06 <50 1,900 <50 <50 48 1
2nd Qtr 6/14/06 <50 2,200 <50 <50 47 4 5
3rd Qtr 7/20/06 <50 2,140 <50 <50 51 4 7
4th Qtr 11/8/06 1 5 2,160 <1 0 <1 0 49 46
1st Qtr 2/28/07 1.1 1,830 <1 0 <1 0 47 6
2nd Qtr 6/27/07 1 5 2,600 <1 0 <1 0 45 5 1
3rd Qtr 8/15/07 1 4 2,300 <1 0 <1 0 44 47
4th Qtr 10/10/07 1 2 1,900 <1 0 <1 0 45 47
1st Qtr 3/28/08 1 3 2,200 <1 0 <1 0 43 4 2
2nd Qtr 6/25/08 1 3 1,800 <1 0 <1 0 43 48
3rd Qtr 9/10/08 1 4 1,600 <1 0 <1 0 35 4 16
4th Qtr 10/15/08 NA NA NA NA 40 4 01
11/18/08 <2 0 2,500 <2 0 <2 0 NA NA
1st Qtr 3/11/09 1 2 1,800 <1 0 <1 0 35 37
2nd Qtr 6/23/09 <1 0 1,400 <1 0 <1 0 37 38
3rd Qtr 9/14/09 1 1,500 <1 0 <1 0 37 4 1
4th Qtr 12/29/09 <1 0 1,300 <1 0 <1 0 37 4 2
1st Qtr 3/3/10 <1 0 1,200 <1 0 <1 0 35 3 8
2nd Qtr 6/14/10 <1 0 1,100 <1 0 <1 0 31 3 9
3rd Qtr 8/11/10 1 1,500 <1.0 <1 0 36 39
4th Qtr 10/15/10.<1 0 1,100 <1 0 <1 0 38 4
1st Qtr 2/23/11 <1 0 1,300 <1 0 <1 0 45 3 6
2nd Qtr 6/1/11 <1 0 1,200 <1 0 <1 0 35 40
3rd Qtr 8/18/11 <1 0 1,200 <1 0 <1 0 37 4 1
4th Qtr 11/29/11 <1 0 1,000 <1.0 <1 0 37 3 8
(1)1 sf Qtr 1/19/12 <1 0 1,000 <1 0 <1 0 37 3 9
2nd Qtr 6/14/12 <1 0 790 <1 0 <1 0 41 4 0
3rd Qtr 9/13/12 <1.0 870 <1 0 <1 0 40 3 8
4th Qtr 10/4/12 <1 0 940 <1 0 <1 0 41 38
1st Qtr 2/13/13 <1 0 940 <1 o'<1 0 37 7 3 51
2nd Qtr 6/18/13 <1 0 953 <1 0 <1 0 39 3 4
3rd Qtr 9/12/13 <1 0 1,040 <1 0 <1 0 36 4 4 17
4th Qtr 11/14/13 <1 0 1,050 <1 0 <1 0 37 2 4 13
1st Qtr 2/5/14 5 41 946'<ib <ib 38 2 4 24
2nd Qtr 5/22/14 4 78 847 <1 0 <1 0 37 7 4 19
3rd Qtr 8/27/14 <1 0 857 1 5 <1 0 39 2 9
4th Qtr 10/30/14 <1 0 926 <1 0 <1 0 40 2 3 68
1st Qtr 3/18/15 <1 o.........’ , 942 <1 0 <1 o" '40 4 4 25
2nd Qtr 6/11/15 <1 0 950 <1 0 <1 0 42 1 2 62
3rd Qtr 9/10/15 <1 0 897 <1 0 <1 0 46 7 4 72
4th Qtr 10/29/15 <1 0 847 <1 0 <1 0 40 6 3 49
1st Qtr 3/22/16 <1 0 834 <1 0 <1 0 42.4 4 43
2nd Qtr 6/8/16 <1 0 909 <1 0 <1 0 44 1 3 75
3rd Qtr 8/4/16 <1 0 1,000 <1 0 <1 0 42 3 4 21
4th Qtr 10/26/16 <1 0 886 <1 0 <1 0 45 8 4 33
1st Qtr 3/21/17 <1 0 986 <1 0 <1 0 40 5 3 87
0 Asof_March^022^^jior^nd£O^th_wildjffepond_s_noJon^£r receiving water
NA - not analyzed — —
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (11 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-8
IstQtr 3/16/05 NA 10 NA NA NA <0 1
2nd Qtr 5/25/05 NA <1 0 NA NA NA 02
3rd Qtr 8/31/05 <1 0 11 1 7 NA NA <1 0
4th Qtr 12/7/05 <1 0 <1 0 <1 0 <1 0 41 <1 0
IstQtr 3/9/06 <i o 1 3 2 1 <1 0 39 0 3
2nd Qtr 6/14/06 <1 0 1 8 1 0 <1 0 37 <1 0
3rd Qtr 7/20/06 <1 0 <1 0 <1 0 <1 0 39 0 1
4th Qtr 11/8/06 <1 0 <1 0 <1 0 <10.40 < 1
IstQtr 2/28/07 <1 6 2.5 <1 0 <1 0 39 07
2nd Qtr 6/27/07 <1 0 25 <1 0 <1 0 42 02
3rd Qtr 8/15/07 <1 0 1 5 <1 0 <1 0 42 <1 0
4th Qtr 10/10/07 <1 0 3 5 <1 0 <1 0 43 0 5
IstQtr 3/28/08 <1 0 <1 0 <1 0 <1 0 46 0 1
2nd Qtr 6/25/08 <1 0 <1 0 <1 0 <1 0 45 <1 0
3rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 39 <0 05
4th Qtr 10/15/08 <1 0 <1 0 <1 0 <1 0 44 <0 05
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <1 0 42 <6 1
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 44 <0 1
3rd Qtr 9/14/09 <1 0 <1 0 <1 0 <10 44 <0 1
4th Qtr 12/17/09 <1 0 <1 0 <1 0 <1 b 51 <0 1
IstQtr 2/24/10 <1 0 <1 0 <1 0 <1 0 57 <0 1
2nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 42 <0 1
3rd Qtr 8/18/10 <1 0 <1 0 <1 0 <1 0 45 <0 1
4th Qtr 10/15/10 <1 0 <1 0 <1.0 <10 46 p 1
1st Qtr 2/16/11 <1 0 <1 0 <1 0 <1 0 52 <0 1
2nd Qtr 5/25/11 <1 0 <1 0 <1 0 <1 0 45 0 1
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 46 0 1
4th Qtr 11/16/11 45 0 2
‘'H 2/7/11 <1 0 <1 0 <1 0 <1 0 NA NA
(3)1 st Qtr 1/18/12 <1 0 <1 b <10 <1 0 45 0 3
2nd Qtr 5/13/12 <1 0 <1 0 <1 0 <1 0 44 02
3rd Qtr 8/29/12 <1 0 <1 0 <1 0 <1 0 48 0 1
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 47 <0 1
IstQtr 2/7/13 <1 0 <1 0 <1 o'<10 46 6 0.41
2nd Qtr 5/30/13 <1 0 <1 0 <1 0 <1 0 45 5 <0 1
3rd Qtr 9/5/13 <1 0 <1 0 <1 0 <1 0 47 5 0 1
4th Qtr 11/7/13 <1 0 <1 0 <1 0 <1 0 46 1 <0 1
ist Qtr 1/23/14 <1 0 63 8 <1 0 <1 0 48 5 0 166
|2)2/6/2014 <1 0 100 <1 0 <1 0 46 5 0 166
2nd Qtr 5/22/14 <1 0 122 <1 0 <1 0 53 0 538
3rd Qtr 8/27/14 <1 0 107 <1 0 <1 0 47 06
4th Qtr 10/29/14 <1 0 191 <1 0 <1 0 46 7 0 914
IstQtr 3/12/15 <1 0 961 <1 0 <1 0 496 2 3
2nd Qtr 6/11/15 <1 0 "981 <1 0 <1 0 53 1 88
3rd Qtr 9/10/15 <1 0 747 <1 0 <1 0 59 6 1 96
4th Qtr 10/29/15 <1 0 770 <1 0 <1 0 52 22
IstQtr 3/17/16 <1.0 634 <1 0 <1 0 54 2 2 48
2nd Qtr 6/8/16 <1 0 595 <1 0 <1 0 58 7 2 14
3rd Qtr 8/4/16 <1 0 522 <1 0 <1 0 56 9 2 10
4th Qtr 10/27/16 <1 0 472 <1 0 <1 0 60 1 2 16
1st Qtr 3/21/17 <1 0 359 <1 0 <1 0 57 4 2 06
(1) VOCs were resampled because laboratory missed holding time
(2) Resampled to verify chloroform concentration that was collected on 1/23/14
(3) _Asof_March ^O^^c^^ortf^nd^o^thj^djif e^onds^iojonger receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (12 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mq/L)
TW4-9
1st Qtr 3/16/05 NA 38 NA NA NA 1 3
2nd Qtr 5/25/05 NA 1 2 NA NA NA 1.3
3rd Qtr 8/31/05 <1 0 <1 0 2 9 <1 0 NA 1 3
4th Qtr 12/7/05 <1 0 <1.0 <10 <1 0 42 1 3
1st Qtr 3/9/06 <1 0 <1 0 26 <1 0 38 1 5
2nd Qtr 6/14/06 <1 0 19 2 7 <1 0 39 1 5
3rd Qtr 7/20/06 <1 0 <1 0 <10 <1 0 41 09
4th Qtr 11/8/06 <1 0 <1 0 <10 <1 0 44 07
1st Qtr 2/28/07 <1 0 <1 0 <1 0 <1 0 ' 44 0 6
2nd Qtr 6/27/07 <1 0 21 <10 <1 0 42 1 3
3rd Qtr 8/15/07 <1 0 9 5 <1 0 <1 0 38 1 8
4th Qtr 10/10/07 <1 0 87 <1 0 <1 0 40 2
1st Qtr 3/28/08 <1 0 1.3 <1 0 <10 35 2 1
2nd Qtr 6/25/08 <1 0 1 <1 0 <1 0 35 23
3rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 28 2 79
4th Qtr 10/15/08 <1 0 <1 0 <1 0 <1 0 58 1 99
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <1 0 30 2 5
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 30 23
3rd Qtr 9/14/09 <1 0 <1 0 ■<1 0 <1 0 30 2 5
4th Qtr i 2/17/09 <To~<i 0................<10 <1 0 '37 .............17
1st Qtr 2/23/10 <10 <1 0 <1 0 <1 0 47 1 4
2nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 33 1 5
3rd Qtr 8/13/10 <1 0 <1 0 <1 0 <1 0 40 1 2
4th Qtr 10/15/10 <1 0 <1 0 <1 0 <1 0 34 1 8
1st Qtr 2/17/11 <1 0 <1 6 <1 0 <1 0 41 1.3
2nd Qtr 5/25/11 <1 0 <1 0 <1 0 <1 0 38 34
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 21 4
4th Qtr 11/16/11 NA NA NA NA 38 23
(1) 12/7/11 <1 0 <1 0 <1 0 <1 0 NA
(2)1 st Qtr 1/18/12 <1.0 <1 0 <1 0 <1 0 28 2 3
2nd Qtr 5/31/12 <1 0 <1 0 <1 0 <1 0 23 40
3rd Qtr 8/30/12 <1 0 <1 0 <1 0 <1 0 22 3 9
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 21 3.8
1st Qtr 2/7/13 <1 0 <1 0 <1 0 '<1 0 20 6 4 49
2nd Qtr 5/30/13 <1 0 <1 0 <1 0 <1 0 21 4 4 49
3rd Qtr 9/5/13 <1 0 <1 0 <1 0 <1 0 22 7 4 03
4th Qtr 11/7/13 <1 0 <1 0 <1 0 <1 0 23 6 4 87
1st Qtr i/29/14 <1 0 <1 0 <10 <1 0 22 4 36
2nd Qtr 5/22/14 <1 0 6 9 <1 0 <1 0 24 3 44
3rd Qtr 8/14/14 <1 0 47 <1 0 <1 0 27 2,7
4th Qtr 10/29/14 <1 0 '161 <10 <1 0 25 4 29
1st Qtr 3/12/15 <10 53 5 <1 0 <1 0 29 5 3 28
2nd Qtr 6/11/15 <1 0 35 1 <1 0 <1 0 35 3 1 83
3rd Qtr 9/3/15 <1 0 48 <1 0 <1 0 39 3 1.44
4th Qtr 10/28/15 <1 0 68 4 <1 0 <1 0 29 2 2 89
ist Qtr 3/17/16 <1 0 74 3 <1 0 <1 0 33 6 2 51
2nd Qtr 6/8/16 <1 0 76 2 <1 0 <1 0 35 1 2 16
3rd Qtr 8/3/16 <1 0 76 8 <1 0 <1 0 33 6 211
4th Qtr 10/26/16 <1.0 76.0 <1 0 <1.0 37 4 2 24
1st Qtr 3/17/17 <10 113 <1 0 <10 34 5 2 18
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (13 Of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-10
1st Qtr 3/16/05 NA 140 NA NA NA 1 6
2nd Qtr 5/25/05 NA 62 NA NA NA 08
3rd Qtr 8/31/05 <2 5 110 6 2 <2 5 NA 1 1
4th Qtr 12/7/05 <2 5 300 <2 5 <2 5 52 3 3
1st Qtr 3/9/06 <5 0 190 <5 0 <5 0 50 2 4
2nd Qtr 6/14/06 <5 0 300 <5 0 <5 0 54 35
3rd Qtr 7/20/06 <5 0 504 <5 0 <5 0 61 6 8
4th Qtr 11/8/06 <1 0 452 1 6 <1 0 58 57
1st Qtr 2/28/07 <1 0 500 <1.0 <1 0 2 73
2nd Qtr 6/27/07 <1 0 350 <1 0 <1 0 54 5.1
3rd Qtr 8/15/07 <1 0 660 <1 0 <1 0 59 73
4th Qtr 10/10/07 <1 0 470 <1 0 <1 0 59 67
1st Qtr 3/28/08 <1 0 620 <1 0 <1 0 55 7 3
2nd Qtr 6/25/08 <1 0 720 <1 0 <1 0 58 99
3rd Qtr 9/10/08 <1 0 660 <1 0 <1 0 51 9.23
4th Qtr 10/15/08 NA NA NA NA 61 105
11/18/08 <2 0 1,200 <2 0 <2 0 NA NA
1st Qtr 3/11/09 <1 0 1,100 <1 0 <1 0 64 11.6
2nd Qtr 6/23/09 <1 0 1,200 <1 0 <1 0 62 98
3rd Qtr 9/14/09 <1.0 910 <1 0 <1 0 51 8 1
4th Qtr 12/22/09 <1 0 300 <1 0 <1 0 51 3 8
1st Qtr 3/3/10 <1 0 460 <1 o''<1 0 48 5 0
2nd Qtr 6/14/10 <1.0 220 <1 0 <1 0 42 1 6
3rd Qtr 8/12/10 <1.0 100 <1 0 <1 0 38 08
4th Qtr 10/15/10 <1.0 VOQ <1 0 <1 0 52 11 0
1st Qtr 2/23/11 <1 0 620 <1 d <1 0 32 9 0
2nd Qtr 6/14/11 <1 0 -280 <1 0 <1 0 42 3 3
3rd Qtr 8/17/11 <1 0 180 <1 0 <1 0 41 1 9
4th Qtr 11/16/11 <1 0 110 <1 0 <1 0 45 l'l
(1)1 st Qtr 1/19/12 <1 0 76 <1 0 <10 40 09
2nd Qtr 6/14/12 <1 0 79 <1 0 <1 0 46 0 8
3rd Qtr 9/12/12 <1 0 130 <1 0 <1 0 44 1 0
4th Qtr 10/3/12 <1 0 140 <1 0 <1 0 45 1 6
1st Qtr 2/13/13 <1 0 .....................154 <1 0 <1 0 49 1 1 2
2nd Qtr 6/13/13 <1 0 486 <1 0 <1 0 51 5 5.6
3rd Qtr 9/12/13 <1 0 1,126 <10 <1 0 67 9 130
4th Qtr 11/14/13 <1 0 1,380 <1 0 <1 0 70 9 160
1st Qtr 1/29/14 5 16 1,260 <1 0 <1 0 73 16 8
2nd Qtr 5/23/14 <10 1,110 <1 0 <1 0 77 3 139
3rd Qtr 8/27/14 <1 0 1,060 1 5 <1 0 74 98
4th Qtr 10/30/14 <1 0 1,220 <1 0 <10 75 2 13 2
1st Qtr 3/18/15 <1 0 1,210 <1 0 <1 0 78 6 15 0
2nd Qtr 6/11/15 <1 0 1,240 <1 0 <1 0 75 114
3rd Qtr 9/10/15 <1 0 1,280 <1 0 <1 0 89 5 14 0
4th Qtr 10/29/15 <1.0 1,350 <1 0 <1 0 79 9 13 5
1st Qtr 3/22/16 <1.0 1,430 <1 0 <1 0 84 1 173
2nd Qtr 6/8/16 <1.0 1,510 <1 0 <1 0 89 5 14 9
3rd Qtr 8/4/16 <1.0 1,500 <1 0 <1 0 85 3 14 9
4th Qtr 10/26/16 <1.0 1,290 <1 0 <1 0 84 4 14 8
1st Qtr 3/21/17 <1.0 1,260 <1 0 <1 0 74 6 13 0
(1j_As_ofMarch 201_2_both_n<Mth^nd£o^th_wjl_djife_ponds_no_lonc]er receiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (14 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-11 (chloroform
pumping well started 1/14/15)
1st Qtr 3/16/05 NA 4,400 NA NA NA 87
2nd Qtr 5/25/05 NA 3,590 NA NA NA 103
3rd Qtr 8/31/05 <10 4,400 <10 <10 NA 94
4th Qtr 12/7/05 <100 4,400 <100 <100 58 94
1 st Qtr 3/9/06 <50 4,400 <50 <50 56 92
2nd Qtr 6/14/06 <50 4,300 <50 <50 56 10 0
3rd Qtr 7/20/06 <50 4,080 <50 <50 55 100
4th Qtr 11/8/06 1 7 3,660 27 1 3 55 10 0
1st Qtr 2/28/07 1 3 3,600 <1 0 1 6 54 10 1
2nd Qtr 6/27/07 1 6 3,800 <1 0 <1 0 53 106
3rd Qtr 8/15/07 1 7 4,500 <1 0 <1 0 53 102
4th Qtr 10/10/07 1 6 4,400 <1 0 1 2 53 9 8
1st Qtr 3/28/08 <1 0 340 <1 0 <1 0 63 77
2nd Qtr 6/25/08 <1 0 640 <1.0 <1 0 46 73
3rd Qtr 9/10/08 <1 0 900 <1.0 <1 0 42 79
4th Qtr 10/15/08 NA NA NA NA 47 9 5
11/18/08 <2 0 1,000 <2 0 <2 0 NA NA
1st Qtr 3/11/09 <1.0 1,000 <1 0 <1 0 49 7 3
2nd Qtr 6/23/09 <1 0 980 <1 0 <1 0 44 68
3rd Qtr 9/14/09 <1 0 1,000 <1 0 <1 0 49 70
4th Qtr 12/29/09 <1 0 860 <1 0 <10 46 66
1st Qtr 3/3/10 <1 0 820 <1 0 <1 0 42 6 8
2nd Qtr 6/14/10 <10 820 <1 0 <1 0 40 69
3rd Qtr 8/12/10 <1 0 800 <1 0 <1 0 43 67
4th Qtr 10/15/10 <1.0 720 <1 0 <1 0 49 64
1st Qtr 2/23/11 <1 0 1,000 <1 0 <1 0 46 65
2nd Qtr 6/1/11 <1 0 930 <1 0 <1 0 49 73
3rd Qtr 8/17/11 <1 0 820 <1 0 <1 0 48 7 1
4th Qtr 11/16/11 <1 0 1500 <1 0 <1 0 46 7 1
(1)1st Qtr 1/24/12 <1 0 610 <10 <1 0 43 6 8
2nd Qtr 6/13/12 <1.0 660 <1 0 <1 0 52 6 7
3rd Qtr 9/13/12 <1 0 .740 <1 0 <1 0 49 30
4th Qtr 10/3/12 <1 0 730 <1 0 <1 0 50 7.0
1st Qtr 2/13/13 3.23 867 <1.0 <1 0 47 3 6.8
2nd Qtr 6/18/13 <1 0 788 <1.0 <1 0 49 3 74
3rd Qtr 9/12/13 <1 0 865 <1 0 <1 0 46 6 78
4th Qtr 11/13/13 <1 0 874 <1 0 <1 0 46 7 8 01
1st Qtr 2/5/14 5 19 785 <1 0 <10 48 5 8.47
2nd Qtr 5/23/14 <1 0 751 <1 0 <1 0 51 6 6 92
3rd Qtr 8/27/14 <1 0 719 1 2 <1 0 48 54
4th Qtr 10/29/14 <1 0 803 <1 0 <1 0 56 4 7 33
(2)1 St Qtr 3/9/15 1 24 2,450 <1 0 <1 0 49 8 8.72
2nd Qtr 6/11/15 <1 0 ' 2,710 <1 0 <1 0 62 2 8 48
3rd Qtr 8/31/15 <1.0 1,120 <1 0 <1 0 73 1 9 61
4th Qtr 10/29/15 <1 0 2730 <1 0 <1 0 55 3 75
1st Qtr 3/9/16 1 2 2,660 <1 0 <1 0 55 5 7 13
2nd Qtr 5/23/16 2 19 3,340 <1 0 <1 0 56 4 7 81
3rd Qtr 7/25/16 <1.0 3,200 <1 0 <1 0 55 3 8 83
4th Qtr 10/12/16 <1 0 3,200 <1 0 <1 0 57 2 8 92
1st Qtr 3/8/17 1 71 3,310 <1 0 '<10 49 8 _ 8 12
ll) 20J2^^hjioj^nd£0^th_wiJdJifeponds no longer receiving water
0^Ch!orofomT_^umping_well started 1/14/15__________
NA = not analyzed
Bold and italics indicates the MDL exceeded the GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (15 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
□USA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pq/L)
Methylene Chloride
(5 pq/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(lOmg/L)
TW4-12
1st Qtr 3/16/05 NA <1 0 NA NA NA 1 4
2nd Qtr 5/25/05 NA <1 0 NA NA NA 1 6
3rd Qtr 8/31/05 <1 0 <1 0 58 <1 0 NA 1 5
4th Qtr 12/7/05 <1 0 <1 0 1 0 <1 0 19 1 4
1st Qtr 3/9/06 <1 0 <1 0 26 <1 0 19 1.3
2nd Qtr 6/14/06 <1 0 <1 0 1 4 <1 0 16 1 4
3rd Qtr 7/20/06 <1 0 <1 0 1 4 <1 0 16 1 4
4th Qtr 11/8/06 <1 0 <1 0 <1 0 <1 0 16 1 4
1st Qtr 2/28/07 <1.0 <1 0 <1 0 <1 0 16 1 5
2nd Qtr 6/27/07 <1.0 <1 0 <1 0 <1 0 18 1 5
3rd Qtr 8/15/07 <1 0 <1 0 <1 0 <1 0 29 1 4
4th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 16 1 4
1st Qtr 3/28/08 <1 0 <1 0 <1 0 <1 0 16 1 6
2nd Qtr 6/25/08 <1 0 <1 0 <1.0 <1 0 19 27
3rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 18 27
4th Qtr 10/15/08 <1 0 <1 0 <1 0 <1 0 22 2 5
1st Qtr 3/11/09 <1 0 <1 0 <1 0 <1 0 23 2 4
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 22 3 8
3rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 22 5 1
4th Qtr 12/16/09 <1 0 <1 0 <1 0 <1 0 23 3 6
1st Qtr 2/23/10 <1 0 <1 0 <1 0 <10 22 4 0
2nd Qtr 6/14/10 <1.0 <1 0 <1 0 <1 0 29 11 0
3rd Qtr 8/10/10 <1 0 <1 0 <1 0 <1 0 35 90
4th Qtr 10/15/10 <1 0 <1 0 <1 0 <1 0 31 8 0
1st Qtr 2/15/11 <1 0 <1 0 <1 0 <1 0 31 ' 6 5
2nd Qtr 5/25/11 <1 0 <1 0 <1 0 <1 0 32 70
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 31 6 8
4th Qtr 11/15/11 <1 0 <1 0 <1 0 <1 0 30 80
(1)1 st Qtr 1/17/12 <1 0 <1 0 <1 0 <1 0 28 77
2nd Qtr 5/31/12 <1 0 <1 0 <1 0 <1 0 34 10 0
3rd Qtr 8/29/12 <1 0 <1 0 <1 0 <1 0 39 130
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 39 13 0
1st Qtr 2/13/13 <1 0 <1 0 <1 0 <1 0 36 7 12 6
2nd Qtr 5/29/13 <10 <1 0 <1 0 <1 0 38 6 142
3rd Qtr 8/29/13 <1 0 <1 0 <1 0 <1 0 41 7 174
4th Qtr 11/6/13 <1 0 <1 0 <1 0 <1 0 41 4 164
1st Qtr 1/22/14 <i o <1 0 <10 <1 0 41 6 184
2nd Qtr 5/21/14 <1 0 <1 0 <1 0 <1 0 40.2 17 0
3rd Qtr 8/27/14 <10 <1 0 <1 0 <1 0 47 13 0
4th Qtr 10/23/14 <1 0 <1 0 <1 0 <1 0 50 2 .16 1
Ts't Qtr 3/11/15 <i d <1 0 <1 0 <10 50 6 19 2
2nd Qtr 6/10/15 <1 0 <1 0 <1 0 <1 0 56 18 8
3rd Qtr 9/2/15 <1 0 <1 0 <1 0 <1 0 60 2 164
4th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 51 18 0
Dedlicate TW4-65 <1 0 <1 0 <1 0 <1 0 51 3 180
1st Qtr 3/15/16 <1 0 <1 0 <1 0 <1 0 56 2 34 8
2nd Qtr 5/25/16 <1 0 <1 0 <1 0 <1 0 66 4 30 7
Dedicate TW4-65 <1 0 <1 0 <1.0 <1 0 67 1130
3rd Qtr 7/27/16 <1 0 <1 0 <1.0 <1 0 67 5 37 7
4th Qtr 10/12/16 <1 0 <1 0 <1 0 <1 0 72 6 25 8
1st Qtr 3/14/17 <1 0 <1 0 <1.0 <10 62 6 25 9
(2) AsofMm^ M^both_nortliandjoijhwiklJ|Jej)ondSinoJonger reraiving water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (16 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
□USA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(lOmg/L)
TW4-13
IstQtr 3/16/05 NA <1 0 NA NA NA 4 2
2nd Qtr 5/25/05 NA <1 0 NA NA NA 4 3
3rd Qtr 8/31/05 <1 0 <1 0 3 1 <1 0 NA 46
4th Qtr 12/7/05 <1 0 <1 0 <1 0 <1 0 69 4 3
1st Qtr 3/9/06 <1 0 <1 0 1 7 <1 0 67 4 2
2nd Qtr 6/14/06 <1 0 <1 0 1 4 <1.0 66 4 9
3rd Qtr 7/20/06 <1 0 <1 0 <1 0 <1 0 65 43
4th Qtr 11/8/06 <1 0 <1 0 <1 0 <1 0 33 08
IstQtr 2/28/07 <1 0 <1 0 <1 0 <10 59 4 0
2nd Qtr 6/27/07 <1 0 <1 0 <1 0 <1 0 59 46
3rd Qtr 8/15/07 <1 0 <1 0 <1 0 <1 0 58 4 4
4th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 58 4 1
1st Qtr 3/28/08 <1 0 <1 0 <1 0 <1 0 54 3.8
2nd Qtr 6/25/08 <1 0 <1 0 <1 0 <1 0 58 4 2
3rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 50 4 3
4th Qtr 10/15/08 <1 0 <1 0 <1 0 <1 0 58 4 6
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <1 0 58 3 7
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 57 1.2
3rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 63 47
4th Qtr 12/16/09 <1 0 <1 0 <1 0 <1 0 60 4 1
1st Qtr 2/24/10 <1 0 <1 0 <1 0 <1 0 53 4 3
2nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 53 52
3rd Qtr 8/10/10 <1 0 <1 0 <1 0 <1 0 55 56
4th Qtr 10/15/10 <1 0 <1 0 <1 0 <1 0 55 58
1st Qtr 2/15/11 <1 0 <1 0 <10 <1 0 60 5 5
2nd Qtr 5/25/11 <1 0 <1 0 <1 0 <1 0 56 64
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 60 52
4th Qtr 11/15/11 <1 0 <1 0 <1 0 <1 0 54 59
(1)1st Qtr 1/17/12 <1 0 <1 0 <1 0 <1 0 55 5 5
2nd Qtr 5/31/12 <1 0 <1 0 <1 0 <1 0 59 60
3rd Qtr 8/29/12 <1 0 <1 0 <1 0 <1 0 60 62
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 60 59
1st Qtr 2/13/13 <10 <1 0 <i 0 <1 0 59 3 6 31
2nd Qtr 5/29/13 <1 0 <1 0 <1 0 <1 0 56 68
3rd Qtr 8/29/13 <1 0 <1 0 <1 0 <1 0 63 5 7 16
4th Qtr 11/6/13 <1 0 <1 0 <1 0 <1 0 58 5 6 48
1st Qtr 1/22/14 <1 0 <1 0 <1 0 <1 0 63 1 7 09
2nd Qtr 5/21/14 <10 <1 0 <1 0 <1 0 56 1 5 99
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 62 4 8
4th Qtr 10/23/14...........<1 0 <1 0 <1 0 <1 0 66 1 6 28
IstQtr 3/11/15 <10........................................<1 0 <1 0 <1 0 66 4 "7 09
2nd Qtr 6/10/15 <1 0 <1 0 <1 0 <1 0 70 3 6 32
3rd Qtr 9/2/15 <1 0 <1 0 <1 0 <1 0 76 5 57
4th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 65 5 5 78
IstQtr 3/16/16 <1 0 <1 0 <1 0 <1 0 69 4 7 97
2nd Qtr 5/25/16 <1 0 <1 0 <1 0 <1 0 71 8 5 87
3rd Qtr 7/28/16 <1 0 <1 0 <1 0 <1 0 69.3 6 14
4th Qtr 10/19/16 <1 0 <1 0 <1 0 <1 0 70 9 6 20
1st Qtr 3/16/17'<1 b <1 0 <1 0 <1 0 66 6 05
(1) ^^[M^rch 202_2_both_northand_south_wi[d^fe_pond_s_no_longer_receMng water
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (17 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-14
1st Qtr 3/16/05 NS NS NS NS NS NS
2nd Qtr 5/25/05 NS NS NS NS NS NS
3rd Qtr 8/31/05 NS NS NS NS NS NS
4th Qtr 12/7/05 NS NS NS NS NS NS
1st Qtr 3/9/06 NS NS NS NS NS NS
2nd Qtr 6/14/06 NS NS NS NS NS NS
3rd Qtr 7/20/06 NS NS NS NS NS NS
4th Qtr 11/8/06 <1 0 NS <1 0 <1 0 37 24
1st Qtr 2/28/07 <1 0 <1 0 <1 0 <1 0 38 2 3
2nd Qtr 6/27/07 <1 0 <1 0 <1 0 <1 0 38 1 4
3rd Qtr 8/15/07 <1 0 <1 0 <1 0 <1 0 36 1 1
4th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 38 08
1st Qtr 3/28/08 <1 0 <1 0 <1 0 <1 0 '57 0 4
2nd Qtr 6/25/08 <1.0 <1 0 <1 0 <1 0 35 1 6
3rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 34 1 38
4th Qtr 10/15/08 <1 0 <1 0 <1 0 <1 0 40 0 76
1st Qtr 3/4/09 <1 0 <1 0 <i o <1 0 35 1 6
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 o 36 1 4
3rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 38 1 5
4th Qtr 12/16/09 <1 0 <1 0 <10 <1 0 34 1 4
1st Qtr 3/3/10 <1 "o <1 d <i o <1 0 33 2 5
2nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 49 2 9
3rd Qtr 8/10/10 <1 0 <1 0 <1 0 <1 0 35 28
4th Qtr 10/15/10 <1 o'<1 0 <1 o <1 0 29 29
1st Qtr 2/15/11 <1 0 <i d <1 0 <1 0 25 1 8
2nd Qtr 6/14/11 <1 0 <1 0 <1 0 <1 0 24 1 4
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 33 26
4th Qtr 11/15/11 <1 0 <1 0 <1 0 <1 0 15 1 7
(1)1 st Qtr 1/17/12 <1 0 <10 <1 0 <1 0 20 19
2nd Qtr 6/14/12 <1 0 <1 0 <1 0 <1 0 35 3 3
3rd Qtr 8/29/12 <1 0 <1 0 <1 0 <1 0 37 3 9
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 37 39
1st Qtr 2/7/13 <1.0 <1 0 <1 0 <1 0 35 2 4 6
2nd Qtr 5/29/13 <1 0 <1 0 <1 0 <1 0 38 6 44
3rd Qtr 8/29/13 <1 0 <1 0 <1 0 <1.0 37 6 4 51
4th Qtr 11/6/13 <10..<1 0 <1 0 <1 0 36 5 4 81
1st Qtr 1/22/14 <1 0 <1 0 <1 0 <1 0 35 5 5 92
2nd Qtr 5/21/14 <1 0 <1 0 <1 0 <1 0 32 5 4 87
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 38 4 1
4th Qtr 10/23/14 <1 0 <1 0 <1 0 <1 0 38 9 5 22
1st Qtr 3/12/15 <1 0 1.7 <1 0 <1 0 ........40 1 5 22
2nd Qtr 6/10/15 <1 0 1 82 <1 0 <1.0 41 8 3 55
3rd Qtr 9/3/15 <1 0 <1 0 <1 0 <1 0 42 4 2 77
4th Qtr 10/23/15 <1 0 1 46 <1 0 <1 0 40 6 2 45
1st Qtr 3/16/16 <1 0 4 49 <1 0 2 18 42 4 2 94
2nd Qtr 5/26/16 <1 0 6 15 <1 0 3.18 43 6 2 45
3rd Qtr 8/3/16 <1 0 5 <1 0 1 8 42 4 2 88
4th Qtr 10/20/16 <1 0 7 02 <1 0 1 59 45 6 2 86
1st Qtr 3/15/17 <1 0 6 45 <1 0 2 18 45 4 4 36
(1) _AsofMarch 20^2^i^ji(2h^ndM^tiTv^jifepon£s_noJonger receiving water
NS = not sampled
Shaded indicates concentrations exceeding GWQS
TABLE 1 (18 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-16
1st Qtr 3/16/05 NA 240 NA NA NA <0 12nd Qtr 5/25/05 NA 212 NA NA NA <0 13rd Qtr 8/31/05 <1 0 85 3.2 43 NA <0 14th Qtr 12/7/05 <1 0 14 26 59 64 1 41st Qir 3/9/06 <1 0 39 1 1 21 60 3
2nd Qtr 6/14/06 <1 0 13 24 89 55 1 9
3rd Qtr 7/20/06 <1 0 52 <1 0 2 7 60 27
4th Qtr 11/8/06 <1 0 136 <1.0 9 2 62 56
1st Qtr 2/28/07 <1 0 87 <1 0 66 ' 79 . 12 3
2nd Qtr 6/27/07 <1 0 26 <1 0 1 8 75 99
3rd Qtr 8/15/07 <1 0 7 1 <1 0 ........^ _65 54
4th Qtr 10/10/07 <1 0 1 4 <1 0 1 69 44
1st Qtr 3/28/08 <1 0 ii <1 0 26 52 <0 12nd Qtr 6/25/08 <1 0 <1 0 <1 0 <1 o’".....................58 i 5
3rd Qtr 9/10/08 <1 0 10 <1 0 14 71 10 5
4th Qtr 10/15/08 <1 0 3 9 <1 0 66 89 98
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <1 0 73 96
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 76 8 93rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 79 884th Qtr 12/17/09 <1 0 <1 0 <1 0 <1 0 76 5 2
1st Qtr 2/24/10 <i o"<10 <10
<1 6 77 4 2
2nd Qtr 6/14/10 <1 0 2 1 <1 0 <1 0 64 47
3rd Qtr 8/24/10 <1 0 4 3 <1 0 <1 0 72 464th Qtr 10/15/10 '<1 0 3 <1 0 <1 0 71 33
1st Qtr 2/22/11 <1 0 15 <1 0 <1 0 86 7
2nd Qtr 5/26/11 <1 0 16 <1 0 <1 0 81 5
3rd Qtr 8/17/11 <1 0 92 <1 0 <1 0 63 1 7
4th Qtr 11/16/11 NA NA NA NA 38 04
(1112/7/11 <1 0 <1 0 <1 0 1 4 NA
(3)1 st Qtr 1/18/12 <1 0 <1 0 <1 0 1 7 48 0 12nd Qtr 5/26/12 <1 0 <1 0 <1 0 <1 0 53 <0 13rd Qtr 8/30/12 <1 0 <1 0 <1 0 <1 0 59 <0 14th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 59 <0 11st Qtr 2/7/13...........<10 <1 0 <1 0 <10 58 1 <0 12nd Qtr 5/30/13 <1 0 <1 0 <1 0 4 21 49 8 <0 13rd Qtr 9/5/13 <1 0 <1 0 <1 0 <1 0 54 4 <0 14th Qtr 11/7/13 <1 0 134 <1 0 <1 0 56 6 1 37
1st Qtr 1/29/14 <1 0 6 93 <1 0 <1 0 66 8 3 16
2nd Qtr 5/22/14 <1 0 146 <1 0 <1 0 80 7 4 94
3rd Qtr 8/14/14 <1 0 ''"229 <1 0 <1 0 80 5 1
,2|3rd Qtr 9/24/14 <1 0 371 <1 0 <1 0 NA NA
4th Qtr 10/29/14 <1 0 387 <1 0 <1 0 92 1 84
1st Qtr 3/12/15 <1 0 153 <1 0 <1 0 65 4 3
2nd Qtr 6/11/15 <1.0 65 3 <1 0 <1 0 61 1 063rd Qtr 9/3/15 <1 0 82 <1 0 <1 0 65 8 1 184th Qtr 10/28/15 <1 0 112 <1.0 <1 0 58 3 1 69
1st Qtr 3/17/16 <1.0 45 9 <1.0 <1 0 56 5 1 63
2nd Qtr 5/26/16 <1 0 93 A <1 0 <1 0 61 3 1 89
3rd Qtr 8/3/16 <1 0 49 <1 0 <1 0 60 2 204th Qtr 10/26/16 <1 0 92 9 <1 0 <1 0 66 7 2 781st Qtr 3/16/17.......<1 0 19 i <1.0 <1 0 62 2 2 75
(1) VOCs were resampled because laboratory missed holding time
(2) VOCs were resampled
(3) As of March 2012 both north and south wild life ponds no longer receiving water.
NA“ notanaiyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (19 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-18
1st Qtr 3/16/05 NA 38 NA NA NA 14 1
2nd Qtr 5/25/05 NA 29 8 NA NA NA 12 9
3rd Qtr 8/31/05 <1 0 39 28 <1 0 NA 13 3
4th Qtr 12/7/05 <1 0 14 1 1 <1 0 41 7 3
1st Qtr 3/9/06 <1 0 12 1 6 <1 0 36 59
2nd Qtr 6/14/06 <1 0 12 2 7 <1 0 35 47
3rd Qtr 7/20/06 <1 0 10 8 <1 0 <1 0 35 6 14th Qtr 11/8/06 <1 0 12 5 <1 0 <1 0 34 57
1st Qtr 2/28/07 <1 0 92 <1 0 <1 0 30 5 1
2nd Qtr 6/27/07 <1 0 8 <1 0 <1 0 28 49
3rd Qtr 8/15/07 <1 0 8 9 <1 0 <1 0 32 50
4th Qtr 10/10/07 <1 0 74 <1 0 <1 0 27 44
1st Qtr 3/28/08 <1 0 64 <1 0 <1 0 23 07
2nd Qtr 6/25/08 <1 0 5 7 <1 0 <1 0 23 4 6
3rd Qtr 9/10/08 <1 0 8 <1 0 <1 0 26 49
4th Qtr 10/15/08 <1 0 94 <1 0 <1 0 30 5 2
1st Qtr 3/4/09 <1 0 11 <1 0 <1 0 29 52
2nd Qtr 6/23/09 <1 0 16 <1 0 <1 0 30 6 23rd Qtr 9/14/09 <1 0 13 <1 0 <1 0 26 5 9
4th Qtr 12/22/09 <1 0 8 2 <1 0 <1 0 30 54
1st Qtr 2/24/10 <1 0 69 <1 0 <1 0 41 5 1
2nd Qtr 6/14/10 <1 0 29 <1 0 <1 0 35 9 0
3rd Qtr 8/12/10 <1 0 29 <1 0 <1 0 37 90
4th Qtr 10/15/10 <1 0 30 <1 0 <1 0 50 10 01st Qtr 2/22/11 <1 0 39 <1 0 <1 0 52 1002nd Qtr 5/26/11 <1 0 26 <1 0 <1 0 36 90
3rd Qtr 8/17/11 <1 0 29 <1 0 <1 0 23 46
4th Qtr 11/16/11 NA NA NA NA 23 63
‘1| 12/7/11 <1 0 28 <1 0 <1 0 NA NA
(2)1 st Qtr 1/18/12 <i'o"25 <1 0 <1 0 18 44
2nd Qtr 6/13/12 <1 0 241 <1 0 <1 0 30 663rd Qtr 9/11/12 <1 0 38 <1 0 <1 0 26 664th Qtr 10/3/12 <1 0 30 <1 0 <1 0 27 60
1st Qtr 2/13/13 <1 0 34 9 <1 0 <1 0 23 1 5 6
2nd Qtr 6/13/13 <1 0 37 9 <1 0 <1 0 22 9 8 93rd Qtr 9/5/13 <1 0 41 <1 0 <1 0 36 2 12 14th Qtr 11/13/13 <1 0 44 3 <1 0 <1 0 37 1 14 2
1st Qtr 1/30/14 <1 0 6 93 <1 0 <1 0 38 9 12 82nd Qtr 5/22/14 <1 0 6 93 <1 0 <1 0 47 12 23rd Qtr 8/14/14 <1 0 32 8 <1 0 <1 0 49 9 8
4th Qtr 10/28/14 ci.o 33 <1 0 <1 0 40 8 111
1st Qtr 3/12/15 <1 0 32 <1 0 <1 0 41 6 11 72nd Qtr 6/11/15 <1 0 30 5 <1 0 <1 0 43 5 9 69
3rd Qtr 9/3/15 <1 0 28 7 <1 0 <1 0 47 6 157
4th Qtr 10/28/15 <1 0 52 9 <1 0 <1 0 39 4 6 241st Qtr 3/17/16 <1 0 56 6 <1 0 <1 0 40 7 5 96
2nd Qtr 6/8/16 <1 0 60 <1 0 <1 0 43 8 5 45
3rd Qtr 8/3/16 <1 0 56 3 <1 0 <1 0 40 7 5 79
4th Qtr 10/26/16 <1 0 60 1 <1 0 <1 0 43 9 5 24
1st Qtr 3/16/17 <1 0 62 <1 0 <1 0 39 4 4 47
Duplicate TW4-75 <1 0 61 5 <1 0 <1 0 41 1 441
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
NA = not analyzed —
Shaded indicates concentrations exceeding GWQS
TABLE 1 (20 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-19 (chlorofrom
pumping well slarted 4/30/03)
IstQtr 3/16/05 NA 2,200 NA NA NA 5 3
2nd Qtr 5/25/05 NA 1,200 NA NA NA 57
3rd Qtr 8/31/05 <5 0 1,400 <5 0 <5 0 NA 46
4th Qtr 12/7/05 <50 2;800 <50 <50 81 <0 11st Qtr 3/9/06 <50 1,200 <50 <50 86 4
2nd Qtr 6/14/06 <50 1,100 <50 <50 116 52
3rd Qtr 7/20/06 <50 1,120 <50 <50 123 4 3
4th Qtr 11/8/06 1 6 1,050 2 6 <1.0 134 46
1st Qtr 2/28/07 1 3 1,200 <1 0 <1 0 '133 4
2nd Qtr 6/27/07 Did not sample
3rd Qtr 8/15/07 1 9 1,100 <1 0 <1 0 129 4 1
4th Qtr 10/10/07 1 9 1,100 <1 0 <1 0 132 4
1st Qtr 3/28/08 2 9 1,800 <1.0 <10 131 2 22nd Qtr 6/25/08 <1 0 1,000 <1 0 <1 0 128 28
3rd Qtr 9/10/08 86 3,600 <1 0 <1 0 113 35 2
4th Qtr 10/15/08 12 4,200 <1 0 <1 0 124 .........................47 8
1st Qtr 3/4/09 1 2 1,100 <i o <1 0 127 3 2
2nd Qtr 6/23/09 1 2 990 <1 0 <1 0 132 24
3rd Qtr 9/14/09 15 6,600 <1 0 <1 0 43 <0 14th Qtr 12/22/09 16 4,700 <1.0 <1 0 124 26 7
1st Qtr 2/17/10 1 3 940 <10 <1 0 144 ...........................2
2nd Qtr 6/14/10 42 1,800 <1 0 <1 0 132 44
3rd Qtr 8/16/10 4 9 2,000 <1 0 <1 0 142 5 9
4th Qtr 10/15/10 1 3 1,200 <1 0 <1 0 146 27
1st Qtr 2/17/11 ...................................17 3,400 <1 0 <1 0 135 17 0
2nd Qtr 6/7/11 8 3 4,000 <1 0 <1 0 148 12.03rd Qtr 8/17/11 ...............2 1 970 <1 0 <1 0 148 3.0
4th Qtr 11/17/11 148 50
,1) 12/5/11 54 2,200 <1 0 <1.0
(2)1 St Qtr 1/23/12 1 5 650 <1 0 <1 0 138 0 62nd Qtr 6/6/12 1 1 460 <1 0 <1 0 149 24
3rd Qtr 9/4/12 35 950 <1.0 <1 0 149 2 5
4th Qtr 10/3/12 4 1500 <1 0 <1 0 150 4 1
IstQtr 2/13/13 5 15 4,210 <1 0 <10 164 8 02nd Qtr 6/5/13 5 15 2,070 <1 0 <1 0 148 30
3rd Qtr 9/3/13 20 7 8,100 <1 0 <1 0 179 17 6
4th Qtr 10/29/13 6 42 942 <1 0 <10 134 47
IstQtr 1/27/14 4 05 586 <1 0 <1 0 134 1 62nd Qtr 5/19/14 5 51 810 <1.0 <1 0 152 1 3
3rd Qtr 8/11/14 ......1 9 1,410 8 3 <1 0 140 1 64th Qtr 10/21/14 4 8 4,310 <1 0 <1 0 130 4 7
IstQtr 3/9/15 ....17’ ... ' 8 92 .............4.660 <1 0 '<10 238 8 562nd Qtr 6/8/15 2 62 1,570 <1 0 <1 0 180 0916
3rd Qtr 8/31/15 <1 0 7,860 7 78 <1 0 326 11 64th Qtr 10/19/15 122 7,840 5 46 <1 0 252 106
IstQtr 3/9/16 13 5 7,780 1 4 <1 0 276 15 70
2nd Qtr 5/26/16 23 1 12.600 <1 0 <1 0 204 V'27
3rd Qtr 7/25/16 9.89 6,040 <1 0 <1 0 214 10 5
4th Qtr 10/13/16 10 8 6,640 <1 0 <1 0 200 10 0IstQtr 3/8/17 3 06 ..........1.240 <10 <1 0 461 11 1
(1) VOCswere resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
NA = not analyzed
Bold and italics indicates the MDL exceeded the GWQS
Shaded indicates concentrations exceeding GWQS
TABLE 1 (21 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
□USA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-20 (chloroform
pumping well started a/4/05)
1st Qtr 3/16/05 Monitor well was not installed
2nd Qtr 5/25/05 NA 39,000 NA NA NA
....... 10 10
(3)3rd Qtr 8/31/05 <10 3,800 <10 <10 NA 2 90
4th Qtr 12/7/05 <250 19,000 <250 <250
131 1 801st Qtr 3/9/06 <500 9,200 <500 <500 120 3 80
2nd Qtr 6/14/06 <500 61,000 <500 <500
235 9 40
3rd Qtr 7/20/06 <1000 5,300 <1000 <1000
134 2 90
4th Qtr 11/8/06 7 1 11,000 1 9 22 124 3 50
1st Qtr 2/28/07 3 1 4,400 <1.0 1 1 124 4 20
2nd Qtr 6/27/07 22 1,800 <1 0 <1 0 112 2 30
3rd Qtr 8/15/07 35 5,200 <1 0 1 8 117 2 104th Qtr 10/10/07 68 9,000 <1 0 1 9 170 5 60
1st Qtr 3/28/08 9 13,000 <1 0 "1 5 .......................132 0 90
2nd Qtr 6/25/08 13 30,000 <1.0 1 2 191 8 003rd Qtr 9/10/08 15 21,000 <1.0 37 156 4 44
4th Qtr 10/15/08 NA NA NA NA 168 5 51
1st Qtr 3/4/09 57 8,200 <1.0 52 164 5 10
2nd Qtr 6/23/09 49 6,800 <1 0 4 2 164 2 90
3rd Qtr 9/14/09 84 13,000 <1 0 44 153 3 30
4th Qtr 12/14/09 14 15,000 <1 0 3 0 187 5 30
1st Qtr 2/17/10 27 3,500 <1 0 3 2 179 '2 00
2nd Qtr 6/14/10 11 18,000 <1 0 37 200 5 60
3rd Qtr 8/16/10 12 15,000 <1 0 22 196 5 30
4th Qtr 10/15/10 20 24,000 <1 0 5 5 20?4 60
1st Qtr 2/23/11 27 31,000 <1 0 19 6 220 4 40
2nd Qtr 6/1/11 10 8,100 <1 0 2 1 177 4 80
3rd Qtr 8/17/11 7 3 3,800 <1 0 3 1 207 6 504th Qtr 11/16/11 72 7,900 <1 0 25 186 4 20
(2)1 st Qtr 1/23/12 10 11000 <1 0 1 3 207 7 90
2nd Qtr 6/6/12 33 36,000 <1 0 <1 0 262 11 do
3rd Qtr 9/4/12 26 13,000 <1 0 <1 0 289 10 804th Qtr 10/3/12 22 19,000 <1 0 <1 0 302 11 001st Qtr 2/11/13 19 6 18,500 <1 0 1 21 252 ................9 07
2nd Qtr 6/5/13 32 5 26,300 <1 0 1 3 250 9 80
3rd Qtr 9/3/13 25 7 26,800 <1 0 2 14 260 8 654th Qtr 10/29/13 17 3 15,700 <1 0 1 37 272 9 64
1st Qtr 1/27/14 184 17,800 <1.0 2 04 254 7 56
2nd Qtr 5/19/14 22 1 22,100 2 31 3 98 269 5 95
3rd Qtr 8/11/14 14 1 12,400 55 2 22 299 4 30
4th Qtr 10/21/14 18 5 23,300 4 04 2 38 292 7 67
1st Qtr 3/9/15 20 8 19,900 4 85 1 38 290 9 80
2nd Qtr 6/8/15 162 17,600 134 1 73 296 5 76
3rd Qtr 8/31/15 15.1 17,000 123 <1 0 365 9 3
4th Qtr 10/19/15 14 5 17,000 10 8 1 293 6 231st Qtr 3/9/16 20 2 21,600 4 09 1 16 293 10 30
2nd Qtr 5/23/16 40 6 33,700 <1 0 <1 0 318 1123rd Qtr 7/25/16 26 6 23,600 <1 0 <1 0 307 11 3
4th Qtr 10/12/16 24.4 21,300 <1 0 <1 0 301 11 4
1st Qtr 3/8/17 23 5 23,400 <1 d <1 0 290 12 0
(1) _VOCs were ns samp led because la bo ratory missed _hoJd1 ng Jmie
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
(3) _Chloroform_pumpin^well started 8/4/05
NA = not analyzed
Bold and italics indicates the MDL exceeded the GWQS
Shaded indicates concentrations exceeding GWQS
TABLE 1 (22 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-21 (chloroform
pumping well 6/9/15)
1 st Qtr 3/16/05 Monitor well was not installed
2nd Qtr 5/25/05 NA 192 NA NA NA 146
3rd Qtr 8/31/05 <5 0 78 <5 0 <5 0 NA 1014th Qtr 12/7/05 <1 0 86 <1 0 <1 0 353 96
1st Qtr 3/9/06 <2 5 120 <2 5 <2 5 347 8 52nd Qtr 6/14/06 <2 5 120 <2 5 <2 5 318 1023rd Qtr 7/20/06 <2 5 108 <2 5 <2 5 357 89
4th Qtr 11/8/06 2 139 <1 0 <1 0 296 87
1st Qtr 2/28/07 1.8 160 <1 0 <1 0 306 8 72nd Qtr 6/27/07 5 8 300 <1 0 <1 0 327 863rd Qtr 8/15/07 <1 0 140 <1 0 <1 0 300 864th Qtr 10/10/07 <1 0 120 <1 0 <1.0 288 8 31 st Qir 3/28/08 7 390 <1 0 <1 0 331 14 3
2nd Qtr 6/25/08 1 7 180 <1 0 <1 0 271 883rd Qtr 9/10/08 1 6 120 <1 0 <1 0 244 7 57
4th Qtr 10/15/08 NA NA NA NA 284 8 011/18/08 2 170 <2 0 <2 0 NA NA
1st Qtr 3/11/09 <1 0 180 <1 0 <1 0 279 8 32nd Qtr 6/23/09 <1 0 200 <1 0 <1 0 291 8 13rd Qtr 9/14/09 <1 0 200 <1 0 <1 0 281 92
4th Qtr 12/22/09 <1 0 160 <1 0 <1 0 256 84
1st Qtr 2/25/10 <1 0 170 <1 0 <1 0 228 84
2nd Qtr 614/10 <1.0 210 <1 0 <1 0 266 12 03rd Qtr 8/13/10 92 390 <1 0 <1 0 278 14.0
4th Qtr 10/15/10 1 2 200 <1 0 <1 0 210 ...........................7 0
1st Qtr 2/22/11 i 2 230 <1 6 <1 0 303 90
2nd Qtr 6/28/11 4 8 290 <1 0 <1 0 290 12.6
3rd Qtr 8/17/11 63 . 460 <1 0 <1 0 287 140
4th Qtr 11/16/11 287 130
0112/7/11 6.7 390 <1 0 <1 0(2)1 st Qtr "i/19/12 64 420 <10 <1 0 228 ............ 150
2nd Qtr 6/13/12 54 400 <1 0 <1 0 285 1103rd Qtr 9/13/12 6 410 <1 0 <1 0 142 13 0
4th Qtr 10/4/12 7 390 <1 0 <1 0 270 14 01st Qtr 2/13/13 .......5 25 282 <10 <1 0 221 118
2nd Qtr 6/18/13 3 49 328 <1 0 <1 0 243 13 8
3rd Qtr 9/13/13 2 13 244 <1 0 <1 0 207 103
4th Qtr 11/13/13 <1.0 204 <1.0 <1 0 206 90
1st Qtr 2/5/14 6 23 ■ 220 <1 b 2 04 200 11 4
2nd Qtr 5/22/14 4 73 240 <1 0 2 04 243 115
3rd Qtr 8/27/14 <1 0 204 <1 0 <1 0 230 7 1
4th Qtr 10/29/14 1.04 229 <1 0 <1 0 252 10 01st Qtr 3/12/15 1 75 292 <1 o '<10 '255 10 9
(3)2nd Qtr 6/8/15 1 92 366 <1 0 <1 0 494 13 1
3rd Qtr 8/31/15 <1 0 281 <1 0 <1 0 499 14 7
4th Qtr 10/19/15 <1 0 339 <1 0 <1 0 413 143
1st Qtr 3/9/16 <1 0 390 <1 0 <1 0 452 146
2nd Qtr 5/23/16 <1 0 545 <1 0 <1 0 425 13 1
3rd Qtr 7/25/16 <1 0 456 <1.0 <1 0 457 165
4th Qtr 10/12/16 <1 0 456 <1 0 <1 0 439 13 5ist Qtr 3/8/17 ..............................2 36 598 <1 0 <1 0 452 17 7
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
{3)^hjorofori^pumping^eFl stalled 6/9/15 “
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (23 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-22
(nitrate pumping well started
1/26/13)
1st Qtr 3/16/05 Monitor well was not installed
2nd Qtr 5/25/05 NA 340 NA NA NA 18 2
3rd Qtr 8/31/05 <5 0 290 <5 0 <5 0 NA 157
4th Qtr 12/7/05 <5 0 320 <5 0 <5 0 253 15 1
1st Qtr 3/9/06 <10 390 <10 <10 236 15 3
2nd Qtr 6/14/06 <10 280 <10 <10 221 14 3
3rd Qtr 7/20/06 <10 864 <10 <10 221 14 5
4th Qtr 11/8/06 <1 0 350 1 6 <1 0 236 15 9
1st Qtr 2/28/07 <1 0 440 <1 0 <1 0 347 20 9
2nd Qtr 6/27/07 <1 0 740 <1 0 <1 0 273 19 3
3rd Qtr 8/15/07 <1 0 530 <1 0 <1 0 259 19 3
4th Qtr 10/10/07 <1 0 440 <1.0 <1 0 238 18 8
1st Qtr 3/28/08 <1 0 1,400 <1.0 <1 0 519 39 i
2nd Qtr 6/25/08 <1 0 1,200 <1 0 <1 0 271 41 9
3rd Qtr 9/10/08 1 3 6,300 <1 0 <1 0 524 38 7
4th Qtr 10/15/08 NA NA NA NA 539 36 3
11/18/08 <2 0 630 <2 0 <2 0 NA NA
1st Qtr 3/11/09 <1 0 390 <1 0 <i 0 177 20 7
2nd Qtr 6/23/09 <1 0 730 <1 0 <1 0 177 20 63rd Qtr 9/14/09 <1 0 2,300 <1 0 <1 0 391 40.3
4th Qtr 12/29/09 <1 0 380 <1 0 <1 0 175 178
1st Qtr 3/3/10 <1 0 2,200 <1 0 <1 0 427 36 8
2nd Qtr 6/14/10 <10 540 <1 0 <1 0 134 190
3rd Qtr 8/24/10 <1 0 340 <1 0 <1 0 130 15.0
4th Qtr 10/15/10 <1.0 340 <1 0 <1 0 134 16.0
1st Qtr 2/22/11 1 2 1.300 <1 o'<10 114 18 0
2nd Qtr 6/1/11 <1 0 210 <1 0 <1 0 138 170
3rd Qtr 8/17/11 <1 0 450 <1 0 <1 0 120 150
4th Qtr 11/16/11 NA NA NA NA 174 19 0
^ 12/7/11 <1.0 400 <1 0 <1 0 NA NA
(2)1 st Qtr 1/19/12 <1 0 200 <i 0 <1 0 36 14 0
2nd Qtr 6/13/12 <1 0 120 <1 0 <1 0 35 128
3rd Qtr 9/12/12 <1 0 121 <1 0 <1 0 7 0
4th Qtr 10/4/12 <1 0 330 <1 0 <1 0 130 14 0
(3)1 st Qtr 2/11/13 3 24 , 10,600 <1 0 <1 0 130 58 0
2nd Qtr 6/5/13 3 35 12,500 <1 0 <1 0 586 50 2
3rd Qtr 9/3/13 3 25 9,640 <1 0 <1 0 487 29 7
4th Qtr 10/29/13 8 09 13,300 <1 0 <1 0 501 45 2
1st Qtr 1/27/14 6.06 12,100 <1 0 2 83 598 54 6
2nd Qtr 5/19/14 ..........................6 65 12,400 <1 0 <10 614 47 2
3rd Qtr 8/11/14 1 9 12,400 .................40 <1 0 540 41 5
4th Qtr 10/29/14 3 32 12,400 1 61 <1 0 596 54 9
1st Qtr 3/9/15 ' 3 77 12,700 '4.31 <1 0 675 69 2
2nd Qtr 6/8/15 2 42 8,050 3 42 <1 0 390 47 1
3rd Qtr 8/31/15 <1 0 7,810 5 47 <1 0 557 64 7
4th Qtr 10/19/15 3 32 7.530 5 1 <1 0 567 56 1
1st Qtr 3/9/16 <1 0 6,070 <1 0 <1 0 583 31 1
2nd Qtr 5/23/16 2 64 8,570 <1 0 <1 0 598 58 4
3rd Qtr 7/25/16 <1 0 5,840 <1 0 <1 0 619 61 3
4th Qtr 10/12/16 -1 08 3,370 <1 0 <10 588 61 5
1st Qtr 3/8/17 1 56 5.320 <1 0 <10 566 69 8
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
0^hloroform_pumpingwell started 1/26/13
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWQS
TABLE 1 (24 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-23
2nd Qtr 6/27/07 <1 0 <1 0 <1 0 <1 0 47 <0 13rd Qtr 8/15/07 <1 0 <1 0 <1 0 <1 0 46 <0 14th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 43 <0 11st Qtr 3/28/08 <1 0 <1 0 <1 0 <i'o 41 <0 12nd Qtr 6/25/08 <1 0 <1 0 <1 0 <1 0 41 <0 13rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 35 <0 05
4th Qtr 10/15/08 NA NA NA NA 51 <0 05
11/18/08 <2 0 <2 0 <2 0 <2 0 NA NA
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <1 0 41 <0 12nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 43 <0 13rd Qtr 9/14/09 <1 0 <1 0 <1 0 <1 0 43 <0 14th Qtr 12/16/09 <1 0 <1 0 <1 0 <1 0 37 <0 1'1st Qtr 2/24/10 <1 0 <1 0 <1 0 <1 0 45 <0 12nd Qtr 6/14/10 <1 0 <1 0 <1 0 <1 0 40 <0 13rd Qtr 8/24/10 <1 0 <1 0 <1 0 <1 0 40 <0 14th Qtr 10/15/10 <1.0 <1.0 <1 0 <1 0 34 <0 11st Qtr 2/16/11 <1.0 <1 0 <1 0 <1 0 44 <0 12nd Qtr 6/14/11 <1 0 <1 0 <1 0 <1 0 44 <0 13rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 41 <0 14th Qtr 11/15/11 <1 0 <1 0 <1 0 <1 0 43 <0 1(1)1 st Qtr 1/17/12 <1 0 <1 0 <1 0 <1 0 40 <0 12nd Qtr 5/31/12 <1 0 <1 0 <1 0 <1 0 44 <0 13rd Qtr 8/29/12 <1.0 <1 0 <1 0 <1 0 46 <0 14th Qtr 10/3/12 <1.0 <1 0 <1 0 <1 0 45 <0 11st Qtr 2/7/13 <1.0 <i 6 <1 0 <1 0 43 6 <0 *1
2nd Qtr 5/30/13 <1 0 <1 0 <1 0 <1 0 44 7 0 13rd Qtr 9/5/13 <1 0 <1 0 <1 0 <1 0 48 <0 14th Qtr 11/7/13 <1.0 <1 0 <1 0 <1 0 43 <0 11st Qtr 1/23/14 <10 .......<1 6 <10 <10...........44 6 <0 12nd Qtr 5/19/14 <1 0 <1 0 <1 0 <1 0 42 3 <0 13rd Qtr 8/13/14 <1 0 <1.0 <1 0 <1 0 46 <0 14th Qtr 10/28/14 <1 0 .<1 0 <1 0 <1 0.46 8 <0 11st Qtr 3/12/15 <1 0 <1 0 <1 0 <1 0 47 3 <0 12nd Qtr 6/8/15 <1 0 <1 0 <1 0 <1 0 48 4 <0.1
3rd Qtr 9/3/15 <1 0 <1.0 <1 0 <1 0 54 1 <0 14th Qtr 10/28/15 <1 0 <1 0 <1 0 <1 0 46 4 <0 1
Duplicate TW4-70 <1 0 <1 0 <1 0 <1 0 46 4 <0 11st Qtr 3/16/16 <1 0 <1 0 <1 0 <1 0 49 1 <0.1
2nd Qtr 5/26/16 <1 0 <1 0 <1 0 <1 0 50 4 <0 13rd Qtr 8/23/16 <1 0 <1 0 <1 0 <1 0 49.6 <0 1Duplicate TW4-70 <1 0 <1 0 <1 0 <1 0 48 3 <0 14th Qtr 10/12/16 <1 0 <1 0 <1 0 <1 0 52 1 <0 11st Qtr 3/15/17 <1 0 <1 0 <1 0 <1 0 47.7 <0 1Duplicate TW4-70 <1 0 <1 0 <1 0 <1 0 49 8 <0 1(1) As of March 2012 both north and south wild life ponds no longer receiving water.
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (25 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-24
(nutate pumping well started
1/26/13)
2nd Qtr 6/27/07 <1 0 26 <1 0 <1 0 770 26 1
3rd Qtr 8/15/07 <1 0 22 <1 0 <1 0 791 29
4th Qtr 10/10/07 <1 0 1 5 <1 0 <1 0 692 24 7
1st Qtr 3/28/08 <1 0 1 5 <1 0 <1 0 740 24 4
2nd Qtr 6/25/08 <1 0 1 4 <1 0 <1 0 834 45 3
3rd Qtr 9/10/08 <1 0 29 <1 0 <1 0 1180 38.4
4th Qtr 10/15/08 NA NA NA NA 1130 44 8
11/18/08 <2 0 <2 0 <2 0 <2 0 NA NA
1st Qtr 3/4/09 <1 0 i 4 <1 0 <1 0 1010 30 5
2nd Qtr 6/23/09 <1 0 1 5 <1 0 <1 0 759 30 4
3rd Qtr 9/14/09 <1 0 1 4 <1 0 <1 0 618 30.7
4th Qtr 12/16/09 <1 0 1 2 <1 0 <1 0 1080 28 31st Qtr 2/25/16 <1 0 1 3 <1 0 <1 0 896 33 1
2nd Qtr 6/14/10 <1 0 1 7 <1 0 <1 0 639 30
3rd Qtr 8/24/10 <1.0 1 8 <1 0 <1 0 587 31
4th Qtr 10/15/10 <1 0 1.4 <1 0 <1 0 522 31'1st Qtr 2/17/1 i <i o "1 8 <1 0 <1 0 1100 31
2nd Qtr 5/26/11 <1 0 1 1 <1 0 <1 0 1110 35
3rd Qtr 8/17/11 <1 0 1 7 <1 0 <1 0 967 34
4th Qtr 11/16/11 NA NA NA NA 608 35
(1112/7/11 <1 0 1 2 <1 0 <1 0 NA NA
(2)1 st Qtr 1/16/12 <1 0 <1 0 <1 0 <1 0 373 37
2nd Qtr 6/6/12 <1 0 <1.0 <1 0 <1 0 355 37
3rd Qtr 8/30/12 <1 0 <1 0 <1 0 <1 0 489 37
4th Qtr 10/3/12 <1 0 1 <1 0 <1 0 405 38
(3)1 st Qtr 2/11/13 <1 0 1 <1 0 <1 0 1260 35.9
2nd Qtr 6/5/13 <1 0 174 <1 0 <1 0 916 23 7
3rd Qtr 8/30/13 <1 0 21 8 <1 0 <1 0 998 33
4th Qtr 10/29/13 <1 0 32 5 <1 0 <1 0 1030 35
1st Qtr 1/27/14 i 18 78 5 <1 0 <1 0 809 31.6
2nd Qtr 5/19/14 <1 0 62 7 <1 0 <1 0 1020 35 0
3rd Qtr 8/11/14 <1 0 76 3 <1 0 <1 0 1150 31.5
4th Qtr 10/21/14 <10 25 8 <1 0 <1 0 1050 35.7
1st Qtr 3/9/15 <1 0 49 2 <1 0 <1 0 944 34.6
2nd Qtr 6/8/15 <1 0 4 28 <1 0 <1.0 1290 31.8
3rd Qtr 8/31/15 <1 0 46 9 <1 0 <1.0 788 25 3
4th Qtr 10/19/15 <1 0 25 3 <1 0 <1 0 909 29 6
1st Qtr 3/9/16 <1 0 22.8 <1 0 <1 0 989 29.1
2nd Qtr 5/23/16 <1 0 69 6 <1 0 <1 0 771 24.2
3rd Qtr 7/25/16 <1 0 17 8 <1 0 <1 0 1180 34 4
4th Qtr 10/12/16 <1 0 20 8 <1.0 <1.0 1010 31.9
1st Qtr 3/8/17 <1 0 18.3 <1 0 <1 0 1090 41 3
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
0^hloroform_pumpingwell started 1/26/13
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (26 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-25
(nitrate pumping well started
1/26/13)
2nd Qtr 6/27/07 <1 0 <1 0 <1 0 <1 0 395
3rd Qtr 8/15/07 <1 0 22 <1 0 <1 0 382 29
4th Qtr 10/10/07 <1 0 <1 0 <1 0 <1 0 358 17
1st Qtr 3/28/08 <1 0 <1 0 <1 0 <1 0 374 187
2nd Qtr 6/25/08 <1 0 <1 0 <1 0 <1 0 344 22.13rd Qtr 9/10/08 <1 0 <1 0 <1 0 <1 0 333 18.8
4th Qtr 10/15/08 NA- NA NA NA 366 21 3
4th Qtr 11/18/09 <2 0 <2 0 <2 0 <2 0 NA NA
1st Qtr 3/4/09 <1 0 <1 0 <1 0 <10 332 15.3
2nd Qtr 6/23/09 <1 0 <1 0 <1 0 <1 0 328 153
3rd Qtr 9/14/09 <1.0 <1 0 <1 0 <1 0 328 3.3
4th Qtr 12/14/09 <1 0 <1 0 <1 0 <1.0 371 14 2
1st Qtr 2/23/10 <1 0 <1 0 <1 0 <1 0 ' '296 14.4
2nd Qtr 6/14/10 <1.0 <1 0 <1 0 <1 0 306 16
3rd Qtr 8/10/10 <1 0 <1 0 <1 0 <1 0 250 14
4th Qtr 10/15/10 <1 0 <1 0 <1 0 <1 0 312 15
1st Qtr 2/16/11 <10 1 8 <1 0 <1 0 315 .............................15
2nd Qtr 5/25/11 <10 <1 0 <1 0 <1 0 321 16
3rd Qtr 8/16/11 <1 0 <1 0 <1 0 <1 0 276 16
4th Qtr 11/15/11 <1 0 <1 0 <1 0 <1 0 294 16
(2)1st Qtr 1/16/12 <1 0 <1 0 <1 0 <1 0 304 16
2nd Qtr 5/31/12 <1 0 <1 0 <1 0 <1 0 287 16
3rd Qtr 9/4/12 <1 0 <1 0 <1 0 <1 0 334 17
4th Qtr 10/3/12 <1.0 <1 0 <1 0 <1 0 338 17
(3)1st Qtr 2/11/13 <1.0 <1 0 <1 0 <1 0 190 9 04
2nd Qtr 6/5/13 <1.0 <1 0 <1 0 <1 0 136 5 24
3rd Qtr 9/4/13 <1.0 <1 0 <1 0 <1 0 119 5 69
4th Qtr 10/31/13 <1 0 <1 0 <1 0 <1 o 88 6 6 11st Qtr 1/27/14 <1 0 <1 0 <1 0 <1 0 85 7 ’ 2 16
2nd Qtr 5/19/14 <1 0 <1 0 <1 0 <1 0 51 1 1 213rd Qtr 8/11/14 <1 0 <1 0 <1 0 <10 67 1 64th Qtr 10/21/14 <1 0 <1 0 <1 0 <1 0 58 1 .........1 03
1st Qtr 3/9/15 <10 <1 0 <1 0 <1 0 310 ....................................14 4
2nd Qtr 6/8/15 <1 0 <1 0 <1 0 <1 0 58 3 1 14
3rd Qtr 8/31/15 <1 0 <1 0 <1 0 <1 0 69 2 1 63
4th Qtr 10/19/15 <1 0 <1 0 <1 0 <1 0 93 7 1 78
1st Qtr 3/9/16 <1 0 <1 0 <1 0 <1 0 62 7 0 837
2nd Qtr 5/23/16 <1 0 <1 0 <1 0 <1 0 75 5 0 959
3rd Qtr 7/25/16 <1 0 <1 0 <1 0 <1 0 74 1 1 78
4th Qtr 10/12/16 <1 0 <1 0 <1 0 <1 0 59 8 1 241st Qtr 3/8/17 <1 0 115 <i o <1 0 285 170
(1) VOCs were resampled because laboratory missed holding time
(2) As of March 2012 both north and south wild life ponds no longer receiving water.
0 C^oroform^pumping^weN started 1/26/13
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (27 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 ug/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mq/L)
TW4-26
2nd Qtr 6/14/10 <1 0 13 <1 0 <1 0 33 79
3rd Qtr 8/24/10 <1 0 52 <1 0 <1 0 17 9 0
4th Qtr 10/15/10 <1 0 54 <1 0 <1 0 22 96
1st Qtr 2/16/11 <1 0 2 <1 0 <1 0 30 10 02nd Qtr 5/26/11 <1 0 29 <1 0 <1 0 15 1003rd Qtr 8/17/11 <1 0 2 8 <1 0 <1 0 19 .............110
4th Qtr 11/16/11 NA NA NA NA 26 . IQ Q
11112/7/11 <1 0 52 <1 0 <1 0 NA NA
(2)1 st Qtr 1/18/12 <1 0 7 <1 0 <10 17 11 0
2nd Qtr 6/6/12 <1.0 4 1 <1 0 <1 0 19 1203rd Qtr 9/11/12 <1 0 4 9 <1 0 <1 0 19 90
4th Qtr 10/3/12 <1 0 4 9 <1 0 <10 19 12 01st Qtr 2/7/13 <1 0 49 <1 0 <1 0 16 6 125
2nd Qtr 6/13/13 <1 0 2 12 <1 0 <1 0 14 5 13 6
3rd Qtr 9/5/13 <1 0 2 81 <1 0 <1 0 176 11 7
4th Qtr 11/7/13 <1 0 3 37 <1 0 <1 0 159 15 9
1st Qtr 1/29/14 <1 0 1 43 <1 0 <1 0 ...... 169 14 2
2nd Qtr 5/21/14 <1 0 4 23 <1 0 <1 0 154 12 5
3rd Qtr 8/11/14 <1 0 1 3 <1 0 <1 0 15 10 84th Qtr 10/28/14 <1 0 2 45 <1 0 <1 0 14 6 12 3
1st Qtr 3/12/15 <1 0 2 37 <1 0 <1 0 14 4 14 4
2nd Qtr 6/10/15 <1 0 6 12 1.17 <1 0 14 4 11 3
3rd Qtr 9/3/15 <1 0 4 77 <1 0 <1 0 14 142
4th Qtr 10/28/15 <1 0 3 45 <1 0 <1 0 13 3 139
1st Qtr 3/16/16 <1 0 1 8 <1 0 <1 0 137 16 9
2nd Qtr 5/26/16 <1 0 8 23 <1 0 <1 0 152 139
3rd Qtr 8/3/16 <1 0 4 42 <1 0 <1 0 13 9 179
4th Qtr 10/20/16 <1 0 19 9 <1 0 <1.0 14 2 15 0
1st Qtr 3/16/17 <1 0 46 1 <1 0 <1 0 16 2 158
TW4-27
(2)1 st Qtr 1/18/12 <1.0 9 <1 0 <1.0 ii 24 0
2nd Qtr 6/13/12 <1 0 <1 0 <1 0 <1 0 17 41 0
3rd Qtr 9/4/12 <1 0 <1 0 <1 0 <1 0 21 '370
4th Qtr 10/3/12 <1 0 <1 0 <1 0 <1 0 18 36 0
1st Qtr 2/7/13 <10 <1 0 <1 0 <i"o " 188 31.2
2nd Qtr 6/13/13 <1 0 <1 0 <1.0 <1 0 20 3 29 4
3rd Qtr 8/30/13 <1 0 <1 0 <1.0 <1 0 19 27 2
4th Qtr 11/6/13 <10 <1 0 <1.0 <1 0 21 8 29 8
1st Qtr 1/23/14 <1 0 <1 0 <10 <10 31.8 31 3
2nd Qtr 5/21/14 <1.0 <1 0 <1 0 <10 20 6 31 1
3rd Qtr 8/13/14 <i 0 <1 0 <1 0 <1 0 23 27 0
4th Qtr 10/28/14 <1 0 <1 0 <10 <1 0 24 4 28.2
1st Qtr 3/11/15 <1 0......<1 0 <1 0 <1.0 26 2 26 5
2nd Qtr 6/10/15 <1 0 <1 0 <1 0 <1 0 26 8 24 0
3rd Qtr 9/2/15 <1 0 1 3 <1 0 <1 0 26 8 20 9
4th Qtr 10/28/15 <1 0 1 6 <1 0 <1.0 26 2 23 5
1st Qtr 3/16/16 <1 0 2 11 <1 0 <1 0 28 25 0
2nd Qtr 5/26/16 <1.0 3 16 <1 0 <1 0 21 2 28 7
3rd Qtr 8/3/16 <1 0 2 78 <1 0 <1 0 27 1 21 84th Qtr 10/20/16 <1 0 38 <1 0 <1 0 29 4 193
1st Qtr 3/15/17 <1 0 4 33 <1 0 <1 0 2 *8 3 22 2
TW4-28
2nd Qtr 6/19/13 <1 0 <1 0 <1 0 <1 0 44 6 14.9
3rd Qtr 8/29/13 <10 <1 0 <1 0 <1 0 45 3 173
4th Qtr 11/6/13 <1 0 <1 0 <1 0 <10 45 3 16 2
1st Qtr 1/22/14 <1 0 <10 <1 0 <1.0 47.8 16 9
2nd Qtr 5/21/14 <1 0 <1 0 <1 0 <1 0 45 7 165
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 50 14 2
4th Qtr 10/23/14 <1 0 <1 0 <1 0 <1 0 52 1 16 5
1st Qtr 3/11/15 <10 <1 0 <1 0 <1 0 52 2 190
2nd Qtr 6/10/15 <1 0 '<1 0 <1 0 <1 0 56 4 19 0
3rd Qtr 9/2/15 <1 0 <1 0 <1 0 <1 0 61 4 17 8
4th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 52 7 187
1st Qtr 3/15/16 <1.0 <1 0 <1 0 <1 0 61 6 34 0
Duplicate TW4-65 <1 p..<1 0 <1 0 <1 0 61 4 32 6
2nd Qtr 5/25/16 <1 0 <1 0 <1 0 <1 0 67 1 ...................290
3rd Qtr 7/27/16 <1 0 <1 0 <1 0 <1 0 70 1 31 3
Duplicate TW4-65 <1 0 <1 0 <1 0 <1 0 70 9 35 6
4th Qtr 10/19/16 <1 0 <1 0 <1 0 <1 0 70 9 25.5
Duplicate TW4-65 <1 0 <1 0 <1 0 <1.0 73 7 25 4
1st Qtr 3/14/17 <1 0 <1 0 <1 0 <1 0 ' 64 2 24.4
Duplicate TW4-65 <1 0 <1 0 <1 0 <1 0 66 4 27 9
(1) VOCs were resampled because laboratory missed holding time
NA = not analyzed
Shaded indicates concentrations exceeding GWQS
TABLE 1 (28 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mq/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-29
2nd Qtr 6/19/13 <1 0 242"<1 0 <1 0 44 8 4 60
2nd Qtr 7/11/13 <1 0 262 <1 0 <1 0 37 7 3 52
3rd Qtr 9/26/13 <1 0 246 <1 0 <1 0 41 4 4 18
4th Qtr 11/13/13 <1 0 260 <1 0 <1 0 42 5 4 11
'1st Qtr 2/5/14 <1 0 258 <1 0 <1 0 14 9 4 63
2nd Qtr 5/22/14 <1 0 262 <1 0 <1 0 38 2 3 52
3rd Qtr 8/27/14 <1 0 242 <1 0 <1 0 41 3 40
4th Qtr 10/29/14 <1.0 290 <1 0 <1 0 41 3 64
1st Qtr 3/12/15 <1 0 299 <1 0 <1 0 40 5 4 14
2nd Qtr 6/11/15 <1 0 329 <1 0 <1 0 42 5 2 95
3rd Qtr 9/3/15 <1 0 276 <1 0 <1 0 47 3 2 19
4th Qtr 10/29/15 <1 0 631 <1 0 <1 0 39 8 2 74
1st Qtr 3/17/16 <1 0 335 <1 0 <1 0 40 5 2 92
2nd Qtr 6/8/16 <1.0 366 <1 0 <1 0 42 9 2 51
3rd Qtr 8/3/16 <1 0 401 <1 0 <1 0 40 6 2 44
4th Qtr 10/26/16 <1 0 392 <1.0 <1 0 44 2 2 40
1st Qtr 3/16/17 <1.0 446 <1 0 <1 0 41 5 2 24
TW4-30
2nd Qtr 6/19/13 <1.0 <1 0
<i 0 <1 0 36 0 95
3rd Qtr 9/26/13 <1 0 <1 0 <1 0 <1 0 36 3 0 952
4th Qtr 11/13/13 <1 0 <1 0 <1 0 <1 0 35 9 1 24
1st Qtr 1/23/14 <1 0 <1 0 <1 0 <1 0 ''36 9 1 36
2nd Qtr 5/22/14 <1.0 <1 0 <1 0 <1 0 31 9 1 44
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 38 1 5
4th Qtr 10/23/14 <1 0 <1 0 <1 0 <1 0 37 1 1 84
1st Qtr 3/11/15 <1 0 1 65 <1 0 <1 0 38 3 2 15
2nd Qtr 6/11/15 <1 0 2 25 <1 0 <1 0 40 3 1 75
3rd Qtr 9/3/15 <1 0 3 27 <1 0 <1 0 44 2 1 75
4th Qtr 10/28/15 <1 0 3 48 <1 0 <1 0 37 8 1 861st Qtr 3/17/16 <1 0 5 16 <1 0 <1 0 39 6 2 74
2nd Qtr 5/26/16 <1 0 7 38 <1 0 <1 0 40 2 2 04
3rd Qtr 8/3/16 <1 0 6 79 <1 0 <1 0 38 6 2 32
4th Qtr 10/20/16 <1 0 8 69 <1 0 <1 0 41 3 2 51
1st Qtr 3/15/17 <1 0 13.6 <1 b <1 0 37 7 2 70
TW4-31
2nd Qtr 6/19/13 <1 0 <1 0 <1 0 <1 0 28 4 1 3
3rd Qtr 9/5/13 <1 0 <1 0 <1 0 <1 0 29 4 1 14th Qtr 11/7/13 <1 0 '<1 P <1 0 <1 0 28 1 33
1st Qtr 1/23/14...........<1 0 <1 0 <1 0 <1 0 28 5 1 32
2nd Qtr 5/21/14 <1 0 <1 0 <1 0 <1 0 26 3 1 223rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 30 1 14th Qtr 10/28/14 <1 0 <1 0 <1 0 <1 0 37 1 1 84
1st Qtr 3/11/15 <1 0 <1 0 <1 0 <1 0 30 6 1 33
2nd Qtr 6/10/15 <1 0 <1 0 <1 0 <1 0 31 1 1 19
3rd Qtr 9/2/15 <1 0 <1 0 <1 0 <1 0 30 4 0 916
4th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 29 1 0 953
1st Qtr 3/16/16 <1.0 <1 0 <1 0 <1 0 31 5 1 84
2nd Qtr 5/25/16 <10 <1 0 <1 0 <1 0 '32 5 1 36
3rd Qtr 7/28/16 <1 0 <1 0 <1 0 <1 0 30 6 1 41
4th Qtr 10/20/16 <1 0 <1 0 <1.0 <1 0 34 1 14
1st Qtr 3/15/17 <10 <10 <1 0 <1 6 31 3 1 19
TW4-32
4th Qtr 11/14/13 <1 0 <1 0 <1 0 <1 0 52 1 4 26
1st Qtr 1/22/14 <1 0 <1 0 <1.0 <1 0 54 5 5.11
2nd Qtr 5/21/14 <1 0 <1 0 <1 0 <1 0 54 9 5 63
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 64 4 2
4th Qtr 10/23/14 <1 o <1 0 <1 0 <1 0 62 6 2 14
1st Qtr 3/11/15 <1 0 <1 0 <1 0 <10 64 2 2 46
Duplicate TW4-65 <1 0 <1 0 <1 0 <1.0 65 9 2 25
2nd Qtr 6/10/15 <1 0 <1 0 <1 0 <1 0 62 7 1 213rd Qtr 9/2/15 <1.0 <1 0 <1 0 <1 0 59 6 5 09
4th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 55 1 1 19
1st Qtr 3/15/16 <1 0 <1 0 <1 0 <1 0 64 2 4 48
2nd Qtr 5/25/16 <1 0 <1 0 <1 0 <1 0 71 8 3 16
3rd Qtr 7/28/16 <1 0 <1 0 <1 0 <1 0 64 4 3 44
4th Qtr 10/19/16 <1 0 <1 0 <1 0 <1 0 66 2 87
1st Qtr 3/17/17 <1.0 <1 6 <Vo <1 0 "62 8 2 82
Shaded indicates concentrations exceeding GWQS
TABLE 1 (29 of 29)
Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2017
Chloroform Contamination Investigation
DUSA White Mesa Mill
Well
Sampling Event
Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform
(70 pg/L)
Chloromethane
(30 pg/L)
Methylene Chloride
(5 pg/L)
Chloride
No GWQS (mg/L)
Nitrate, Nitrate + Nitrite
(10 mg/L)
TW4-33
4th Qtr 11/14/13 <1 0 126 <1 0 <1 0 47 2 1 821st Qtr 1/30/14 <1 0 124 <1 0 <1 0 43 5 2 56
2nd Qtr 5/22/14 <1 0 121 <1 0 <1 0 46 8 1 63
3rd Qtr 8/27/14 <1 0 104 <1.0 <1 0 43 1 50
4th Qtr 10/29/14 <1 0 124 <1 0 <1 0 44 2 2 221st Qtr 3/12/15 <1 0 134 <1 0 <1 0 44 2 i 91
2nd Qtr 6/11/15 <1 0 127 <1 0 <1 0 46 6 1 623rd Qtr 9/3/15 <1 0 123 <1 0 <1 0 53 3 1 64
4th Qtr 10/29/15 <1 0 129 <1 0 <1 0 44 5 1 92
1st Qtr 3/17/16 <1 0 122 <1 0 <1 0 46 2 2 13
2nd Qtr 6/8/16 <1 0 96 1 <1 0 <1 0 49 7 2 063rd Qtr 8/4/16 <1 0 121 <1.0 <1 0 48.5 2 32
4th Qtr 10/26/16 <1 0 109 <1.0 <1 0 52 4 2 36
1st Qtr 3/17/16 <1 0 90 7 <1 0 <1 0 49 0 2 11TW4-34
4th Qtr 11/14/13 <1 0 <1 0 <1 0 <1 0 192 1 64
1st Qtr 1/23/14 <1 0 <1.0 <1 0 <1 0 20 4 1 93
2nd Qtr 5/22/14 <1 0 <1 0 <1 0 <1 0 179 1 69
3rd Qtr 8/13/14 <1 0 <1 0 <1 0 <1 0 18 1 104th Qtr 10/29/14 <1 0 <1 0 <1.0 <1 0 178 1 161st Qtr 3/11/15 <1 0 <1 0 <1 0 <10 17 7 1212nd Qtr 6/11/15 <1 0 <1 0 <1 0 <1 0 174 0 8683rd Qtr 9/3/15 <1 0 <1 0 <1 0 <1 0 15 1 0 458
4th Qtr 10/21/15 <1 0 <1.0 <1 0 <1 0 158 0 368
1st Qtr 3/16/16 <1 0 <1 0 <1 0 <1 0 173 0 925
2nd Qtr 5/25/16 <1 0 <1 0 <1.0 <1 0 18 0 605
3rd Qtr 8/3/16 <1 0 <1 0 <1 0 <1 0 17.2 0 726
4th Qtr 10/20/16 <1 0 <1 0 <1.0 <1 0 19 0612
1st Qtr 3/15/17 <10 <1 0 <10 <1 0 180 0 674
TW4-35
3rd Qtr 8/27/14 <1.0 <1 0 <1 0 <1 0 34 0 24th Qtr 10/28/14 <1 0 <1 0 <1 0 <1 0 34 1 0 351
1st Qtr 3/11/15 <1 0 <10 <1 0 <1 0 34 9 0 436
2nd Qtr 6/10/15 <1.0 <1 0 <1 0 <1 0 35 2 0 452
3rd Qtr 9/3/15 <1 0 <1 0 <1 0 <1 0 35 9 0 304
4th Qtr 10/28/15 <1.0 <1 0 <1 0 <1 0 33 4 0419
1st Qtr 3/16/16 <1 0 <1 0 <1 0 <1 0 35 4 0 521
2nd Qtr 5/26/16 <1 0 <1 0 <1 0 <1 0 35 4 0 631
3rd Qtr 8/3/16 <1 0 <1 0 <1 0 <1 0 34 8 0 723
4th Qtr 10/20/16 <1 0 <1 0 <1 0 <1 0 37 1 0 6261st Qtr 3/15/17 <1 0 <1 0 <1 0 <1 0 33 7 0 673
TW4-36
3rd Qtr 8/27/14 <1 0 <1 0 <1 0 <1 0 65 <0 14th Qtr 10/23/14 <1 0 <1 0 <1 0 <1 0 67 3 <0 11st Qtr 3/11/15 <1 0 <1 0 <10 <1 0 67 2 <0 12nd Qtr 6/10/15.........<1 0 <1 0 <1 0 <1 0 69 3 <0 13rd Qtr 9/3/15 <1 0 <1 0 <1 0 <1 0 76 4 <0 14th Qtr 10/21/15 <1 0 <1 0 <1 0 <1 0 64 5 <0 11st Qtr 3/11/16 <1 0 <1 0 <1 0 <1.0 67 2 <0 12nd Qtr 5/25/16 <1 0 <1 0 <1 0 <1 0 72 3 <0 13rd Qtr 7/28/16 <1 0 <1 0 <1 0 <1 0 69 4 <0 14th Qtr 10/20/16 <1 0 <1 0 <1 0 <1 0 73 8 <0 1Duplicate TW4-70 <1 0 <1 0 <1 0 <1 0 72 <0 11st Qtr 3/15/17 <1 0 <1 0 <1 0 <1 0 60 2 <0 1
TW4“37(cWoroform
pumping well 6/9/15)
2nd Qtr 6/8/15 18 2 s'djoo"15.7 1 94 345 35 2
3rd Qtr 8/31/15 166 19,100 137 1 04 374 32 4
4th Qtr 10/19/15 125 19,500 9 38 1 17 399 34 6
1st Qtr 3/9/16 158 17,500 3 57 1 34 332 28 4
2nd Qtr 5/23/16 144 16,200 3 57 1 17 389 27 9
3rd Qtr 7/25/16 167 15,900 <1 0 <1 0 294 33 4
4th Qtr 10/12/16 16 3 16,400 <1 0 <1 0 304 26 1
1st Qtr 3/8/17 154 18,000 3 57 1 34 305 32 3
TW4-38
4th Qtr 11/10/16 <1 0 <1 0 <1 0 <1 o ;40 11 21st Qtr 3/15/17 <1 0 <1 0 <1 d <1 0 '' 35 7 106
TW4-39(chloioform
pumping well (11/2016)
4th Qtr 11/11/16 <1.0 2,800 <1 0 <1 0 68 9 20 7
1st Qtr 3/8/17 815 6,460 <1 0 1 35 130 6 44Shaded indicates concentrations exceeding GWQS
(1) VOCs were resampled because laboratory missed holding time
Table 2
Summary of QA/QC Samples
1st Quarter 2017
Parameter GWQS Duplicate of TW4-28 Duplicate of TW4-23 Duplicate of TW4-18
TW4-28 TW4-65 RPD TW4-23 TW4-70 RPD TW4-18 TW4-75 RPD
Chloride none 64.2 66.4 -3.4 47.7 49.8 -4.3 39.4 41.1 -4.2
Nitrate + Nitrite (as N)10 mg/L 24.4 27.9 -13.4 <0.1 <0.1 nc 4.47 4.41 1.4
Chloroform 70 pg/L <1.0 <1.0 nc <1.0 <1.0 nc 62.0 61.5 0.8
Carbon tetrachloride 5 pg/L <1.0 <1.0 nc <1.0 <1.0 nc <1.0 <1.0 nc
Chloromethane 30 pg/L <1.0 <1.0 nc <1.0 <1.0 nc <1.0 <1.0 nc
Methylene Chloride 5 pg/L <1.0 <1.0 nc <1.0 <1.0 nc <1.0 <1.0 nc
nc = not calculated
label 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
1st Quarter 2017
Data Discriptions Chloroform Pumping Wells Nitrate Pumping Wells
MW4 MW-26 TW4-1 TW4-2 TW4-4 TW4-11 TW4-19 TW4-20 TW4-21 TW4-37 TW4-39 TWN-2 TW4-22 TW4-24 TW4-25
Nitrate (mg/L)5.0 0 768 4.44 4 74 6 87 8 12 11 10 120 17.7 32.3 6.4 27.4 69.8 41.3 17.0
Nitrate (g/L)4.99E-03 7.68E-04 4.44E-03 4 74E-03 6.87E-03 8.12E-03 1 11E-02 1 20E-02 1 77E-02 3 23E-02 6 40E-03 2.74E-02 6 98E-02 4 13E-02 1.70E-02
Nitrate (Ibs/L)1.10E-05 1.70E-06 9.81 E-06 1 05E-05 1.52E-05 1 79E-05 2.45E-05 2.65E-05 3.91 E-05 7.14E-05 1.41 E-05 6.05E-05 1.54E-04 9.13E-05 3 76E-05
Nitrate (Ibs/gal)4.17E-05 6.42E-06 3.71 E-05 3.96E-05 5 75E-05 6 79E-05 9 28E-05 1 00E-04 1 48E-04 2 70E-04 5 35E-05 2.29E-04 5.84E-04 3 45E-04 1.42E-04
Total gallons pumped 76,642 26,107 16,944 19,870 23,527 2,984 110,417 13,553 54,334 97,072 103,118 45,283 24,066 99,117 161
lbs of nitrate removed 3 20 0.17 0.63 0 79 1 35 0.20 10.25 1.36 8.04 26.22 5.52 10 38 14 05 34.23 0 023
Gallons of nitrate removed 0.26 0.01 0.05 0.06 011 0.02 0 83 0 11 0 65 2 13 0.45 0.84 1 14 279 0.00
Total lbs of nitrate removed from pumping wells inside nitrate plume 110.05Total lbs of nitrate removed from pumping wells inside nitrate plume 110.05
Total gallons of nitrate removed from pumping wells inside nitrate plume8.95
Total lbs of nitrate removed from pumping wells outside nitrate plume 6.36
Total gallons of nitrate removed from pumping wells outside nitrate plume0.50
Total lbs nitrate removed from all pumping wells 116.41
Total gallons of nitrate removed from all pumping wells 9.46
% lbs of nitrate removed by pumping wells inside nitrate plume94 54