DRC-2009-006929_3 - 0901a06880154905

White Mesa Uranium Mill
Supplemental Chloroform Monitoring Report Addendum
State of Utah
Notice of Violation and Groundwater Corrective Action Order UDEQ
Docket No UGQ-20-O1
Pt Quarter January through March
2009
Prepared by Denison Mines USA Corp DUSA
December 2009
Introduction
The requirements of the White Mesa Uranium Mill Groundwater Monitoring Plan Quality
Assurance Plan QAP were modified and approved as Revision to the QAP on June 20 2009
With this revision Appendix of the QAP Chloroform Investigation Monitoring Quality
Assurance Plan was modified to include additional reporting requirements for Quarterly
Chloroform Investigation Monitoring Reports Contrary to these requirements and by
inadvertent oversight these new reporting needs were not addressed by the Vt Quarter 2009
Chloroform Monitoring Report In discussions with UDEQ representatives on October 29 2009
and in response to UDEQs findings dated November 10 2009 Denison proposed to amend the
report by means of preparing supplement to the report Accordingly this supplement to the 1st
Quarter 2009 Report was prepared in order to amend the Report by inclusion of the following
information
reporting of the historic mass removal of chloroform from the shallow aquifer to date
reporting of total historic chloroform mass removed from each pumping well to date
reporting of chloroform mass removed from each pumping well in the quarter
reporting of the total chloroform removed in the quarter
revised isoconcentration map to display the 70 ug/l isoconcentration contour line and
listing of the historic analytical results which includes the results of analyses for
carbon tetrachioride chloride chlornmethane and methylene chloride
In addition to these data information pertaining to monitoring wells TW4-23 TW4-24 and
TW4-25 with regard to the listing of historic groundwater elevation data and the inclusion of
hydrographs to display groundwater elevation data overtime were not provided in the 1st Quarter
2009 report Accordingly Denison also agreed in the October 29 2009 discussion with UDEQ
and in response to the November 10 2009 UDEQ correspondence that the 1st Quarter 2009
would be updated with respect to these wells by means of supplemental amendment of the report
In accordance with these additional information needs this supplemental addendum to the report
was prepared in order to provide the following supplemental information pertaining to the 1st
Quarter 2009 Quarterly Chloroform Monitoring Report
chloroform mass removal information is updated by this supplement through the creation
of new section of the report Section 4.4.5 Mass Removal
the graphic display of water level elevations is supplemented by providing additional
hydrographs for wells TW4-23 TW4-24 and TW4-25 pertaining to Tab of the Report
the listing of water elevation data is updated to include listings for wells TW4-23 TW4-
24 and TW4-25 pertaining to at Tab of the Report
the isoconcentration map has been modified to display the 70 ug/l concentration contour
line pertaining to Tab of the Report and
historical data relating to analyses for carbon tetrachloride chloride chloromethane and
methylene chloride are provided as additions to the chloroform and nitrate data already
included at Tab of the Report
SIGNATURE AND CERTIFICATION
This document was prepared by Denison Mines USA Corp on December 18 2009
DENISON MINES USA CORP
By
David Frydenlund
Vice President Regulatory Affairs and Counsel
Certification
certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with system designed to assure that qualified personnel
properly gather and evaluate the information submitted Based on my inquiry of the person or
persons who manage the system or those persons directly responsible for gathering the
information the information submitted is to the best of my knowledge and belief true accurate
and complete am aware that there are significant penalties for submitting false information
including the possibility of fine and imprisonment for knowing violations
David Frydenlund
Vice President Regulatory Affairs and Counsel
Denison Mines USA Corp
Section 4.4.5
4.4.5 Mass Removed
Chloroform removal was estimated as of the 1st Quarter 2007 Since that estimation the
mass removed by-well for each quarter has been compiled in the table below indicating that
total of 398.7 pounds of Chloroform have been removed
Chloroform Mass Removal lbs MW4 TW4-15 TW4-19 TW4-20 Total lbs Removed
Total lbs As of Vt Qtr 2007 36.8 12.9 150.2 87 286.9
Qtr 2007 lbs removed 1.4 0.1 2.5
3rd Qtr 2007 lbs removed 2.2 0.8 2.9 3.1
4th Qtr 2007 lbs removed 1.7 1.0 3.1 4.8 10.6
VQtr 2008 lbs removed 1.7 0.4 4.6 7.2 13.9
Qtr 2008 lbs removed 1.3 0.5 3.2 9.9 14.9
3rd Qtr 2008 lbs removed 1.2 0.3 15.9 9.3 26.7
4th Qtr 2008 lbs removed 1.3 0.3 20.7 0.4 22.7
Vt Qtr 2009 lbs removed 1.7 0.4 4.3 3.6 10
Total lbs Chloroform Removed 49.3 16.7 204.9 127.8 398.7
TabF
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TabO
Water Levels and Data over Time
White Mesa Mill Well TW4-23
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
WL LSD MP Riser Monitoring blw.MP blw.LSD Well
5605.77 5607.37 1.60 123.3
5538.88 9/13/2007 68.49
5538.80 10/10/2007 68.57
5539.54 3/26/2008 67.83
5539.53 6/24/2008 67.84
5539.68 8/26/2008 67.69
5539.57 0/14/2008 67.80
5539.86 3/6/2009 67.51
Water Levels and Data over Time
White Mesa Mill Well TW4-24
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
WL LSD MP Riser Monitoring blw.MP blw.LSD Well
5623.43 5625.43 2.00 122
5568.21 9/13/2007 57.22
5568.10 10/10/2007 57.33
5569.03 3/26/2008 56.40
5568.94 6/24/2008 56.49
5568.94 8/26/2008 56.49
5568.72 10/14/2008 56.71
5568.97 3/6/2009 56.46
Water Levels and Data over Time
White Mesa Mill Well TW4-25
Total or
Measuring Measured Total
Water Land Point Depth to Depth to Total
Elevation Surface Elevation Length Of Date Of Water Water Depth Of
WL LSD MP Riser Monitoring blw.MP blw.LSD Well
5642.82 5644.72 1.90 143.15
5601.67 9/13/2007 43.05
5601.70 10/10/2007 43.02
5596.92 3/26/2008 47.80
5594.07 6/24/2008 50.65
5593.98 8/26/2008 50.74
5593.93 10/14/2008 50.79
5596.28 3/6/2009 48.44
TabJ
EXPLANATION
perched monitoring well ehnwing
nnncenlretinn in nOd
tempnrery perched mnnitnring well
showing cnncenlretinn in cOil
perched pieznmeter Innt sempledl
perched monitoring well lnelelled April 2000
rhewing cencestrelien in cO/I
temperery perched mnnuterieg well installed
April 20115 shewing cnncenlrelinn in cOil
semperery perched meellering well installed
May 2007 showing cneceslrssinn in nO/i
T37S
T38S
SCALE IN FEET
//
//
//
//
//
//
//
//
//
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NOTES ND not detected NS not sampled
HYDRO
GEO
CHEM INC
KRIGED 1st QUARTER 2009 CHLOROFORM uG/L
WHITE MESA SITE
8000/mayO9/chIO3O9cart
TabK
MW-4 Chloroform
ug/l
Carbon
tetrachlonde
ugh
Chloromethane
ugh
Methyiene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/i
28-Sep-99 6200
28-Sep-99 5820
28 Sep 99 6020
15 Mar-00 5520
15-Mar-00 5430
2-Sep-00 5420 9.63
30-Nov-00 6470 9.37
29-Mar-01 4360 8.77
22-Jun-01 6300 9.02
20-Sep-01 5300 9.45
8-Nov-01 5200
26-Mar-02 4700 8.19
22-May-02 4300 8.21
12-Sep-02 6000 8.45
24-Nov-02 2500 8.1
28-Mar-03 2000 8.3
30-Apr-03 3300 NA
30-May-03 3400 8.2
23 Jun 03 4300 8.2
30-Jul-03 3600 8.1
29-Aug-03 4100 8.4
12-Sep-03 3500 8.5
15-Oct-03 3800 8.1
8-Nov-03 3800 8.0
29 Mar 04 NA NA
22-Jun-04 NA NA
17-Sep-04 3300 6.71
17-Nov-04 4300 7.5
16-Mar-05 2900 6.3
25May05 3170 7.1
1-Aug-05 3500 7.0
1-Dec-05 3000 7.0
9-Mar-06 3100 6.0
14-Jun-06 3000 6.0
20-Jul-06 2820 1.2
9-Nov-06 2830 6.4
15-Aug-07 2600 6.2
10-Oct-07 2300 6.2
26-Mar-08 2400 5.8
25-Jun 08 2500 6.09
10 Sep-08 1800 6.36
15-Oct-08 2100 5.86
12-Sep-02 5700 8.3
24-Nov-02 5000 8.5
28-Mar-03 4500 8.2
23-Jun-03 4700 8.4
12-Sep-03 3400 8.6
10-Nov-03 4500 8.4
29-Mar-04 NA NA
22-Jun-04 NA NA
17-Sep-04 3300 6.83
MW-4 Chloroform
ugh
Carbon
tetrachionde
ugfl
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
17Nov04 4100
16 Mar-05 3700 7.1
25 May-05 3740 7.8
31-Aug-05 3800 10 10 10 6.9
1-Dec-05 3000 50 50 50 NA
20-Jul-06 2820 50 50 50 1.2 48
9-Nov-06 2830 2.1 1.4 6.4 50
9-Mar-06 3100 50 50 50 49
14-Jun 06 3000 50 50 50 49
28-Feb07 2300 1.6 6.3 47
27-Jun-07 2000 1.8 45
15-Aug-07 2600 1.9 62 47
10-Oct-07 2300 1.7 cl 6.2 45
26-Mar-08 2400 1.7 5.8 42
25-Jun-08 2500 1.6 6.09 42
10-Sep-08 1800 1.8 6.36 35
10/15/2008 2100 1.7 5.86 45
4-Mar-09 2200 1.5 5.7 37
TW4-1 Chloroform
ugfl
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ugIl
Nitrate
mg/l
Chloride
mg/I
28-Jun-99 1700 7.2
10-Nov-99 5.79
15-Mar-00 1100
10-Apr-00 1490
6-Jun-00 1530
2-Sep 00 2320 5.58
30-Nov 00 3440 7.79
29 Mar-01 2340 7.15
22 Jun-01 6000 8.81
20-Sep-01 NA 12.8
Nov-01 3200 12.4
26 Mar-02 3200 13.1
22-May-02 2800 12.7
12 Sep-02 3300 12.8
24-Nov 02 3500 13.6
28-Mar 03 3000 12.4
23-Jun-03 3600 12.5
12-Sep-03 2700 12.5
8-Nov-03 3400 11.8
29-Mar-04 3200 11
22-Jun-04 3100 8.78
17-Sep-04 2800 10.8
17-Nov04 3000 11.1
16-Mar-05 2700 9.1
25-May-05 3080 10.6
31-Aug-05 2900 10 10 10 9.8
Dec-05 2400 50 50 50 9.6
20-Jul 06 2840 50 50 50 9.7 51
8-Nov-06 2260 1.4 9.4 47
9-Mar-06 2700 50 50 50 9.2 49
14-Jun-06 2200 50 50 50 9.2 48
28-Feb-07 1900 1.2 8.9 47
27-Jun-07 1900 1.4 45
15-Aug-07 2300 1.3 8.4 43
10-Oct-07 2000 1.3 7.8 43
26-Mar-08 2000 1.3 7.6 39
25 Jun-08 1900 1.1 8.68 39
10 Sep-08 1700 1.3 8.15 35
15-Oct-08 1700 1.3 9.3 41
11-Mar-09 1700 1.1 7.5 37
TW4-2 Chloroform
ug/l
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/I
10-Nov-99 2510
2-Sep-00 5220
28-Nov-00 4220 10.7
29-Mar-01 3890 10.2
22-Jun-01 5500 9.67
20-Sep-01 4900 11.4
8-Nov 01 5300 10.1
26-Mar 02 5100 9.98
23-May 02 4700 9.78
12-Sep-02 6000 9.44
24-Nov-02 5400 10.4
28-Mar-03 4700 9.5
23-Jun-03 5100 9.6
12-Sep-03 3200 8.6
8-Nov-03 4700 9.7
29-Mar-04 4200 9.14
22-Jun-04 4300 8.22
17 Sep-04 4100 8.4
17-Nov-04 4500 8.6
16-Mar 05 3700 7.7
25-May-05 3750 8.6
31-Aug-05 3900 10 10 10 8.0
Dec-lOS 3500 50 50 50 7.8
9-Mar 06 3800 50 50 50 7.5 56
14-Jun-06 3200 50 50 50 7.1 56
20-Jul-06 4120 50 50 50 7.4 54
8-Nov-06 3420 2.3 7.6 55
28-Feb-07 2900 1.8 7.3 54
27-Jun 07 3000 2.5 7.8 50
15-Aug 07 340 2.2 7.3 49
10-Oct 07 3200 2.1 6.9 51
26-Mar 08 3300 2.3 6.9 48
25-Jun-08 3100 2.2 7.44 46
10-Sep-08 2800 2.4 7.1 42
15-Oct-08 3200 2.4 7.99 47
11-Mar-h09 3100 2.2 6.S 46
TW4-3 Chloroform
ug/l
Carbon
tetrachlonde
ug/l
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
28 Jun 99 3500 7.6
29 Nov-99 702
15-Mar-00 834
2-Sep-00 836 1.56
29-Nov-00 836 1.97
27-Mar-01 347 1.85
21-Jun-01 390 2.61
20-Sep 01 300 3.06
7-Nov-01 170 3.6
26-Mar-02 11 87
21-May-02 204 4.34
12-Sep-02 203 4.32
24-Nov-02 102 4.9
28-Mar-03 ND 4.6
23-Jun-03 ND 4.8
12-Sep-03 ND 4.3
8-Nov-03 ND 4.8
29 Mar-04 ND 4.48
22-Jun 04 ND 3.68
17-Sep-04 ND 3.88
17-Nov-04 ND 4.1
16-Mar-OS ND 3.5
25 May-05 ND 3.7
31-Aug05 ND 3.5
1-Dec-OS ND 2.3 3.3
9-Mar-06 ND 2.2 ci 3.3 26
14-Jun-06 ND 3.2 26
20-Jul-06 ND 1.6 2.9 26
8-Nov-06 ND 1.5 23
28-Feb07 ND 3.1 22
27-Jun07 ND 3.3 23
15-Aug-07 ND 3.1 24
10/10/2007 ND 2.8 27
26-Mar-08 ND 2.8 21
25-Jun-08 ND c1 2.85 19
10-Sep-08 ND 2.66 19
15-Oct-08 ND 2.63 22
4-Mar-09 ND 2.5 21
TW4-4 Chloroform
ugh
Carbon
tetrachioride
ugIl
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/l
Chloride
mg/I
6-Jun-00 ND
2-Sep-00 ND
28-Nov-00 3.85
28-Mar-01 2260 1.02
20-Jun-01 3100 14.5
20-Sep-01 3200 14
8Nov01 2900 14.8
26 Mar 02 3400 15
22 May-02 3200 13.2
12 Sep 02 4000 13.4
24 Nov 02 3800 12.6
28-Mar-03 3300 13.4
23 Jun 03 3600 12.8
12 Sep 03 2900 12.3
Nov-03 3500 12.3
29-Mar-04 3200 12.2
22-Jun-04 3500 12.1
17-Sep-04 3100 11.1
17-Nov-04 3600 10.8
16-Mar-05 3100 11.6
25 May-05 2400 10
31Aug05 3200 10 10 10 11.3
1-Dec-05 2800 50 50 50 10.2
9-Mar-06 2900 50 50 50 9.5 51
14-Jun-06 2600 50 50 50 8.6 48
20-Jul-06 2850 50 50 50 9.7 50
8-Nov06 2670 1.7 10.1 49
28-Feb-07 2200 1.5 49
27-Jun-07 2400 1.7 9.4 47
15-Aug-07 2700 1.5 cl 9.5 45
10-Oct-07 2500 1.5 9.5 47
26-Mar-08 2800 1.6 cl 9.2 43
25-Jun-08 2500 1.5 10.8 42
10-Sep 08 2200 1.4 8.83 39
15 Oct-08 2500 10.1 44
4-Mar-09 2200 1.2 10.2 37
TW4-5 Chloroform
ug/i
Carbon
tetrachioride
ng/l
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/i
20-Dec 99 29.5
15-Mar-00 49
2-Sep-00 124
29-Nov-00 255
28-Mar-01 236
20-Jun-01 240
20 Sep-01 240
Nov 01 260
26 Mar 02 260
22-May-02 300
12-Sep 02 330
24 Nov-02 260
28 Mar-03 240
23 Jun-03 290
12-Sep-03 200
8-Nov-03 240
29-Mar-04 210
22-Jun-04 200
17-Sep-04 150
17-Nov-04 180
16-Mar 05 120
25 May-05 113
1-Aug-05 82 2.5 5.8 2.5
1-Dec-05 63 2.5 2.5 2.5
9-Mar-06 66 2.5 3.1 2.5 52
14Jun06 51 2.5 2.5 5.9 51
20-Jul-06 53.7 6.7 54
8-Nov-06 47.1 2.9 55
28-Feb-07 33 7.8 57
27-Jun-07 26 45
15-Aug-07 9.2 7.7 38
10-Oct 07 9.4 8.2 39
26-Mar08 11 7.4 36
25-Jun-08 9.3 8.7 37
10 Sep-08 11 7.91 34
15-Oct-08 10 9.3 37
4-Mar-09 12 7.9 34
TW4-6 Chloroform
ugIl
Carbon
tetrachloride
ugh
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
6-Jun-00 ND
2-Sep-00 ND
28-Nov-00 ND ND
26-Mar-01 ND .13
20 Jun-01 ND ND
20 Sep-01 3.6 ND
Nov-01 1.00 ND
26-Mar-02 ND ND
21-May-02 ND ND
12-Sep-02 ND ND
24-Nov-02 ND ND
28Mar03 ND 0.1
23-Jun-03 ND ND
12-Sep-03 ND ND
8-Nov-03 ND ND
29 Mar-04 ND ND
22-Jun 04 ND ND
17-Sep-04 ND ND
17-Nov-04 ND ND
16-Mar-05 ND 0.2
25-May-OS ND 0.4
31-Aug-05 10.0 10 2.8 10 0.8
1-Dec 05 17 1.3 0.9
9-Mar-06 31 1.2 31
14-Jun-06 19 1.0 30
20-Jul-06 11 0.6 37
Nov-06 42.8 1.4 65
28-Feb-07 46 1.5 32
27-Jun-07 11 0.6 38
15-Aug-07 18 0.7 36
10-Oct-07 18 0.8 38
26-3-08 52 1.1 33
25-Jun-08 24 ci 0.9 35
10-Sep-08 39 1.14 35
15-Oct-08 37 1.01 33
11-Mar-09 81 2.2 35
TW4-7 Chloroform
ugh
Carbon
tetrachioride
ugh
Chioromethane
uWI
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/i
29 Nov 99 256
15 Mar-00 616
2-Sep-00 698
29-Nov-00 684 1.99
28-Mar-01 747 2.46
20-Jun-01 1100 2.65
20-Sep-01 1200 3.38
8Nov01 1100 2.5
26 Mar 02 1500 3.76
23 May 02 1600 3.89
12Sep02 1500 3.18
24 Nov 02 2300 4.6
28-Mar-03 1800 4.8
23-Jun-03 5200 7.6
12-Sep-03 3600 7.6
8-Nov-03 4500 7.1
29-Mar-04 2500 4.63
22-Jun-04 2900 4.83
17-Sep-04 3100 5.59
17-Nov-04 3800
16Mar05 3100 5.2
25-May-05 2700 5.4
31-Aug-05 3100 10 10 10 5.2
1-Dec-05 2500 50 50 50 5.3
9-Mar-06 1900 50 50 50 1.0 48
14 Jun 06 2200 50 50 50 4.5 47
20-Jul-06 2140 50 50 50 4.7 51
8-Nov-06 2160 1.5 4.6 49
28-Feb-07 1800 1.1 47
27-Jun-07 2600 1.5 5.1 45
14-Aug-07 2300 1.4 4.7 44
10 Oct-07 1900 1.2 4.7 45
26 Mar 08 2200 1.3 4.2 43
25-Jun08 1800 1.3 4.8 43
10-Sep-08 1600 1.4 4.16 35
15-Oct-08 1900 4.01 40
11-Mar-09 1800 1.2 3.7 35
TW4-8 Chloroform
ug/l
Carbon
tetrachloride
ugIl
Chioromethane
ug/l
Methylene
Chloride
ugIl
Nitrate
mg/I
Chloride
mg/I
29-Nov-99 ND
15-Mar-00 21.8
2-Sep-00 102
29-Nov-00 107 ND
26 Mar-01 116 ND
20Jun01 180 ND
20-Sep 01 180 0.35
7-Nov-01 180 ND
26-Mar-02 190 0.62
22-May-02 210 0.77
12-Sep-02 300 ND
24-Nov-02 450 ND
28-Mar-03 320 0.8
23 Jun 03 420 ND
12-Sep-03 66 ND
8-Nov-03 21.0 0.1
29-Mar-04 24 0.65
22-Jun-04 110 0.52
17-Sep-04 120 ND
17-Nov-04 120 ND
16-Mar-05 10.0 ND
25 May 05 ND 0.2
31-Aug-05 1.1 ND
1-Dec-OS ND 1.7 ND
9-Mar-06 1.3 0.3 39
14-Jun-06 ND ci 2.1 ND 37
20Jul06 ND 1.8 0.1 39
8-Nov-06 ND ND 40
28-Feb-07 2.50 ci 0.7 39
27-Jun-07 2.5 0.2 42
15-Aug-07 1.S ND 42
10-Oct-07 3.S 0.S 43
26-Mar-08 ND 0.1 46
25-Jun-08 ND ND 45
lOSep-08 ND ND 39
15-Oct-08 ND ND 44
4Mar09 ND ND 42
TW4-9 Chloroform
ug/l
Carbon
tetrachloride
ag/I
Chloromethane
ag/I
Methylene
Chloride
ag/I
Nitrate
mg/I
Chloride
mg/I
20-Dec-99 4.24
15-Mar-00 1.88
2-Sep-00 14.2
29 Nov 00 39.4 ND
27 Mar 01 43.6 ND
20-Jun-01 59 .15
20-Sep-01 19 0.40
7-Nov-01 49 0.1
26-Mar-02 41 0.5
22-May-02 38 0.65
12-Sep-02 49 0.2
24-Nov-02 51 0.6
28-Mar-03 34 0.6
23-Jun-03 33 0.8
12-Sep-03 32 1.1
8-Nov-03 46 1.1
29 Mar-04 48 0.82
22 Jun 04 48 0.75
17-Sep-04 39 0.81
17-Nov-04 26 1.2
16-Mar-05 3.8 1.3
25-May-05 1.2 1.3
31-Aug-OS ND 2.9 1.3
1Dec05 ND 1.3
9-Mar-06 ND 2.6 1.5 38
14-Jun-06 ND 2.7 1.5 39
20-Jul-06 ND 0.9 41
8-Nov-06 ND 0.7 44
28Feb07 ND 0.6 44
27-Jun-07 21 ci 1.3 42
15-Aug-07 9.5 1.8 38
10-Oct-07 8.7 40
26-Mar-08 1.3 2.1 35
25-Jun-08 1.0 2.3 3S
10-Sep-08 ND 2.79 28
15-Oct-08 ND 1.99 58
4-Mar-09 ND ci 2.5 30
TW4-1O Chloroform
ag/i
Carbon
tetrachloride
ug/l
Chioromethane
ug/l
Methylene
Chloride
ag/I
Nitrate
mg/i
Chloride
mg/I
21-Jan-02 14
26-Mar-02 16 0.14
21-May-02 17 0.11
12 Sep 02 6.0 ND
24-Nov-02 14 ND
28-Mar-03 29 0.2
23-Jun-03 110 0.4
12-Sep-03 74 0.4
8-Nov-03 75 0.3
29-Mar-04 22 0.1
22-Jun-04 32 ND
17-Sep-04 63 0.46
17-Nov-04 120 0.4
16-Mar-05 140 1.6
25-May-05 62.4 0.8
31-Aug-05 110 1.1
1-Dec-05 300 2.5 2.5 6.2 3.3
9-Mar-06 190 50 50 2.4 50
14 Jun 06 300 50 50 3.5 54
20-Jul-06 504.00 50 50 6.8 61
8-Nov-06 452.00 1.6 5.7 58
28-Feb-07 500 7.6 62
27-Jun-07 350 5.1 54
15Aug07 660 7.3 59
10-Oct-07 470 6.7 59
26-Mar-08 620 7.3 55
25-Jun-08 720 9.91 58
10-Sep-08 680 9.23 51
15 Oct-08 1200 10.5 61
11-Mar-09 1100 11.6 64
TW4-11 Chloroform
ag/I
Carbon
tetrachloride
ugh
Chioromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
1-Jan-02 4700
26-Mar-02 4900 9.60
22-May-02 5200 9.07
12-Sep 02 6200 8.84
24 Nov-02 5800 9.7
28 Mar-03 5100 9.7
23 Jun-03 5700 9.4
12-Sep-03 4600 9.9
8-Nov-03 5200 9.3
29-Mar-04 5300 9.07
22-Jun-04 5700 8.74
17-Sep-04 4800 8.75
17 Nov-04 5800 9.7
16 Mar-05 4400 8.7
25 May-05 3590 10.3
31-Aug-05 4400 10 10 10 9.4
1-Dec 05 4400 100 100 100 9.4
9-Mar-06 4400 50 50 50 9.2 56
14-Jun-06 4300 50 50 50 10 56
20-Jul-06 4080 50 50 50 10 55
8-Nov-06 3660 1.7 2.7 1.3 10 55
28 Feb-07 3500 1.3 1.6 10.1 54
27-Jun 07 3800 1.6 1.1 10.6 53
15-Aug-07 4500 1.7 1.1 10.2 53
10-Oct-07 4400 1.6 1.2 9.8 53
26-Mar-08 340 7.7 63
25-Jun-08 640 7.28 46
10-Sep 08 900 7.93 42
15-Oct-08 1000 9.46 47
11-Mar-09 1100 7.3 49
TW4-12 Chloroform
ugIl
Carbon
tetrachloride
ugfl
Chloromethane
ug/l
Methylene
Chloride
ugIl
Nitrate
mgIl
Chloride
mg/I
12-Sep-02 1.5 2.54
24-Nov-02 ND 2.2
28-Mar-03 ND 1.9
23Jun03 ND 1.8
12Sep03 ND 1.8
9Nov03 ND 1.6
29 Mar-04 ND 1.58
22-Jun-04 ND 1.4
17-Sep-04 ND 1.24
17-Nov-04 ND 1.5
16-Mar-OS ND 1.4
25 -May-05 ND 1.6
31-Aug-OS ND 5.8 1.5
1-Dec-OS ND 1.4
9-Mar-06 ND 1.3 19
14Jun06 ND 1.4 16
20Jul06 ND 1.4 16
8-Nov06 ND 1.4 16
28-Feb-07 ND 1.5 16
27-Jun-07 ND 15 18
Aug-15-07 ND 1.4 29
10-Oct-07 ND 1.4 16
26-Mar08 ND 1.6 16
25-Jun-08 ND 2.69 19
10-Sep-08 ND 2.65 18
15-Oct-08 ND 2.47 22
Mar-09 ND 2.4 23
TW4-13 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
uWl
Methylene
Chloride
ugIl
Nitrate
mg/i
Chloride
mg/I
12-Sep-02 ND ND
24Nov02 ND ND
28-Mar-03 ND 0.2
23-Jun-03 ND 0.2
12-Sep 03 ND ND
Nov-03 ND 0.9
29 Mar-04 ND 0.12
22-Jun-04 ND 0.17
17-Sep-04 ND 4.43
17-Nov-04 ND 4.7
16-Mar-05 ND 4.2
25 May 05 ND 4.3
31-Aug-OS ND 3.1 4.6
1-Dec-OS ND 4.3
Mar-06 ND 1.7 4.2 67
14Jun06 ND 1.4 4.9 66
20-Jul-06 ND 4.3 65
8-Nov-06 ND 0.8 33
28-Feb-07 ND 59
27-Jun-07 ND 4.6 59
15-Aug-07 ND 4.4 58
10-Oct-07 ND 4.1 58
26 Mar-08 ND 3.8 54
25-Jun-08 ND 4.24 58
10-Sep-08 ND 4.26 50
15-Oct-08 ND 4.63 58
4-Mar-09 ND 3.7 58
TW4-14 Chloroform
ugh
Carbon
tetrachloride
ugh
Chioromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/i
Chloride
mg/i
Nov-06 ND ND ND ND 2.4 37
28-Feb-07 ND ND ND ND 2.3 38
27-Jun-07 ND ND ND ND 1.4 38
15-Aug-07 ND ND ND ND 1.1 36
10-Oct-08 ND ND ND ND 0.8 38
26-Mar 08 ND ND ND ND 0.4 57
25Jun08 ND ND ND ND 1.56 35
10-Sep-08 ND ND ND ND 1.34 34
15-Oct-08 ND ND ND ND 0.76 40
Mar-09 ND ND ND ND 1.6 35
TW4-15
MW-26 Chloroform
uWl
Carbon
tetrachioride
ug/I
Chioromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
12Sep02 2.6 ND
24-Nov 02 ND ND
28-Mar-03 ND 0.1
23-Jun-03 7800 14.5
15-Aug-03 7400 16.8
12-Sep-03 2500 2.7
25-Sep-03 2600 2.5
29-Oct-03 3100 3.1
8-Nov-03 3000 2.8
29 Mar-04 NA NA
22 Jun-04 NA NA
17 Sep 04 1400 0.53
17-Nov-04 300 0.2
16-Mar-05 310 0.3
30-Mar-05 230 0.2
25-May-05 442 0.2
1-Aug-05 960 5.4 0.2
1-Dec-05 1000 50 50 0.3
9-Mar-06 1100 50 50 50 0.2 52
14-Jun 06 830 50 50 50 0.2 52
20Jul06 2170 50 50 50 1.4 65
8-Nov-06 282 2.8 0.3 54
28-Feb-07 570 5.5 0.5 56
27-Jun-07 300 13 0.4 49
15-Aug-07 1400 36 57
10Oct07 2000 14 0.6 57
26-Mar-08 930 40 0.1 49
25-Jun-08 1300 53 0.56 57
10-Sep-08 630 24 0.24 44
15-Oct-08 1700 100 0.65 64
4-Mar-09 950 51 0.4 49
TW4-16 Chloroform
ugfl
Carbon
tetrachloride
ugh
Chloromethane
ug/l
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
12-Sep 02 140 ND
24 Nov 02 200 ND
28-Mar-03 260 ND
23-Jun-03 370 ND
12-Sep-03 350 ND
8-Nov-03 400 ND
29-Mar-04 430 ND
22-Jun-04 530 ND
17-Sep 04 400 ND
17-Nov 04 350 ND
16-Mar-05 240 ND
25-May-05 212 ND
1-Aug-05 85 3.2 43 ND
1-Dec-05 14 2.6 5.9 1.4
9-Mar-06 39 1.1 21 3.0 60
14-Jun-06 13 2.4 8.9 1.9 55
20-Jul-06 2.7 2.7 60
8-Nov-06 13.6 9.2 5.6 62
28-Feb-07 8.70 6.5 12.3 79
27-Jun-07 2.60 1.8 9.9 75
15Aug07 7.10 5.1 5.4 66
10-Oct-07 L40 ci ci ci 44 69
26-Mar-08 11.00 26 ND 52
25-Jun-08 ND 146 58
10-Sep-08 10.00 14 10.5 71
15 Oct-08 3.9 6.6 9.82 89
4-Mar-09 ND cl 9.6 78
TW4-17
MW-32
Chloroform
ag/i
Carbon
tetrachioride
ug/l
Chloromethane
ag/I
Methylene
Chloride
ag/I
Nitrate
mg/i
Chloride
mg/I
12-Sep-02 1.6 ND
24 Nov 02 ND ND
28-Mar-03 ND ND
23-Jun-03 ND ND
12-Sep-03 ND ND
8-Nov-03 ND ND
29-Mar-04 ND ND
22-Jun-04 ND ND
17-Sep-04 ND ND
17-Nov-04 ND ND
16-Mar-05 ND ND
30-Mar-OS ND ND
25-May-OS ND ND
1-Aug-05 ND 3.2 ND
1-Dec-OS ND ND 32
9-Mar-06 ND ND 30
14-Jun-06 ND 3.5 ND 32
20-Jul-06 ND 1.8 ND 31
8-Nov06 ND 1.5 ND 32
28Feb07 ND ND 32
27-Jun-07 ND ND 31
15-Aug-07 ND ND 32
10-Oct-07 ND ND 31
26-Mar-08 ND ND 29
2S Jun-08 ND ND 30
10-Sep-08 ND cl ND 26
15-Oct-08 ND ND 30
4-Mar-09 ND ND 31
TW4-18 Chloroform
ug/l
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/l
12-Sep02 440 1.49
24-Nov-02 240 13.3
28-Mar-03 160 13.1
23-Jun-03 110 19
12-Sep-03 68 19.9
9-Nov-03 84 20.7
29 Mar-04 90 14
22-Jun 04 82 12.2
17-Sep 04 38 14.5
17-Nov04 51 17.3
16Mar05 38 14.1
25 May-05 29.8 12.9
31 Aug 05 39 13.3
1-Dec 05 14 2.8 7.3
Mar-06 12 1.1 5.9 5.9
14-Jun-06 12 1.6 4.7 35
20-Jul-06 10.80 2.7 6.1 35
8-Nov-06 139.00 8.7 34
28-Feb-07 9.2 5.1 30
27-Jun-07 8.0 4.9 28
15-Aug-07 8.9 32
10 Oct-08 7.4 4.4 27
26-Mar-08 6.4 0.7 23
25-Jun-08 5.7 4.55 23
10-Sep-08 8.0 4.68 26
15Oct08 9.4 515 30
4-Mar-09 11.0 5.2 29
TW4-19 Chloroform
ug/l
Carbon
tetrachloride
ng/l
Chloromethane
ugh
Methylene
Chloride
ugll
Nitrate
mg/I
Chloride
mg/l
12-Sep-02 7700 47.6
24-Nov-02 5400 42
28-Mar-03 4200 61.4
15-May-03 4700 NA
23-Jun 03 4500 11.4
15 Jul 03 2400 6.8
15 Aug 03 2600
12-Sep-03 2500 5.7
25-Sep-03 4600 9.2
29-Oct-03 4600 7.7
9-Nov-03 2600 4.8
29-Mar-04 NA NA
22-Jun-04 NA NA
16Aug04 7100 9.91
17 Sep 04 2600 4.5
17-Nov-04 1800 3.6
16-Mar-05 2200 5.3
25-May-05 1200 5.7
1-Aug-05 1400 4.6
1-Dec-05 2800 50 50 50 ND
9-Mar-06 1200 50 50 50 4.0 86
l4Jun-06 1100 50 50 50 5.2 116
20 Jul-06 1120 50 50 50 4.3 123
8-Nov-07 1050 1.6 2.6 4.6 134
28-Feb-07 1200 1.3 133
27-Jun-07 1800 2.3
15 Aug-07 1100 1.9 4.1 129
10-Oct08 1100 1.9 132
26-Mar-08 1800 2.9 2.2 131
25-Jun-08 1000 2.81 128
10-Sep-08 3600 8.6 36.2 113
15-Oct-08 4200 12 47.8 124
4-Mar-09 1100 1.2 3.2 127
TW4-20 Chloroform
ug/l
Carbon
tetrachloride
iigfl
Chloromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
25-May-05 39000 NS NS NS 10.1 NS
1-Aug-05 3800 ND ND ND 2.9 NS
1-Dec-05 19000 ND ND ND 1.8 131
Mar 06 9200 ND ND ND 3.8 120
14 Jun-06 61000 ND ND ND 9.4 235
20-Jul-06 5300 ND ND ND 2.9 134
8-Nov-06 11000 7.1 1.9 2.2 3.5 124
28-Feb-07 4400 3.1 ND 1.1 4.2 124
27-Jun-07 1800 2.2 ND ND 2.3 112
15-Aug-07 5200 3.5 ND 1.8 2.1 117
10-Oct-08 9000 6.8 ND 1.9 5.6 170
26-Mar-OS 13000 9.0 ND 1.5 0.9 132
25-Jun-08 30000 13 ND 1.2 7.96 191
10-Sep-08 21000 15 ND 3.7 4.44 156
15-Oct-08 NS NS NS NS 5.51 166
4-Mar-09 8200 5.7 ND 5.2 5.1 164
TW4-21 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
uWl
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/i
25-May-05 192 NS NS NS 14.6 NS
31-Aug-US 78 ND ND ND 10.1 NS
1-Dec-05 86 ND 1.0 ND 9.6 353
9Mar06 120 ND ND ND 8.5 347
14 Jun-06 130 ND ND ND 10.2 318
20-Jul-06 106 ND ND ND 8.9 357
8-Nov-06 139 2.0 ND ND 8.7 296
28-Feb-07 160 1.8 ND ND 8.7 306
27-Jun-07 300 5.8 ND ND 8.6 327
15-Aug-07 140 ND ND ND 8.6 300
10-Oct-07 120 ND ND ND 8.3 288
26-Mar-08 390 7.0 ND ND 14.3 331
25-Jun-08 160 1.7 ND ND 8.81 271
10-Sep-08 120 1.6 ND ND 7.57 244
15-Oct-08 170 2.0 ND ND 8.0 284
11-Mar-09 180 ND ND ND 8.3 279
TW4-22 Chloroform
ug/l
Carbon
tetrachloride
ug/l
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
25-May-05 340 NS NS NS 18.2 NS
31-Aug-05 290 ND ND ND 15.7 NS
1-Dec 05 320 ND ND ND 15.1 263
Mar-06 390 ND ND ND 15.3 236
06/14/06 280 ND ND ND 14.3 221
07/20/06 864 ND ND ND 14.5 221
11/08/06 350 ND 1.6 ND 15.9 236
28-Feb-07 440 ND ND ND 20.9 347
06/27/07 740 ND ND ND 19.3 273
Aug-15-07 530 ND ND ND 19.3 259
Oct-10-08 440 ND ND ND 18.8 238
26-Mar-US 1400 ND ND ND 39.1 519
25-Jun-08 1200 ND ND ND 41.9 271
10-Sep-08 6300 1.3 ND ND 38.7 524
15-Oct-08 630 ND ND ND 36.3 539
11-Mar-09 390 ND ND ND 20.7 177
TW4-23 Chloroform
ug/l
Carbon
tetrachloride
ug/1
Chloromethane
ug/l
ethylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/i
06/27/07 ND ND ND ND ND 47
Aug-15-07 ND ND ND ND ND 46
Oct-10 08 ND ND ND ND ND 43
26 Mar-08 ND ND ND ND ND 41
25 Jun-08 ND ND ND ND ND 41
10-Sep-08 ND ND ND ND ND 35
15-Oct-08 ND ND ND ND ND 51
11-Mar-09 ND ND ND ND ND 41
TW4-24 Chloroform
ug/l
Carbon
tetrachioride
zig/I
Chloromethane
ug/l
Methylene
Chloride
ugh
Nitrate
mg/l
Chloride
mg/I
06/27/07 2.6 ND ND ND 26.1 770
Aug-15 07 2.2 ND ND ND 29.0 791
Oct 1008 1.5 ND ND ND 24.7 692
26-Mar-08 1.5 ND ND ND 24.4 740
25-Jun-08 1.4 ND ND ND 45.3 834
10-Sep-08 2.9 ND ND ND 38.4 1180
15-Oct-08 ND ND ND ND 44.6 1130
11-Mar-09 1.4 ND ND ND 30.5 1010
TW4-25 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/l
Chloride
mg/I
06/27/07 ND ND ND ND 17.1 395
Aug-15-07 ND ND ND ND 16.7 382
Oct-10-08 ND ND ND ND 17.0 356
26-Mar 08 ND ND ND ND 18.7 374
25-Jun 08 ND ND ND ND 22.1 344
10Sep08 ND ND ND ND 18.8 333
15-Oct-08 ND ND ND ND 21.3 366
11-Mar-09 ND ND ND ND 15.3 332