DRC-2009-007202 - 0901a068803619de

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White Mesa Uranium Mill
Supplemental Chloroform Monitoring Report Addendum
State of Utah
Notice of Violation and Groundwater Corrective Action Order UDEQ
Docket No. UGQ-20-01
,nd 2 Quarter (April through June)
2009
Prepared by Denison Mines (USA) Corp. (DUSA)
December, 2009
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
Quarter April through June
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 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 2nd
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 ugh isoconcentration contour line and
listing of the historic analytical results which includes the results of analyses for
carbon tetrachloride chloride chloromethane 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 2nd
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 2nd 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
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
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 Fryd nlund
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 412.2 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
2nd 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
VtQtr 2008 lbs removed 1.7 0.4 4.6 7.2 13.9
2nd 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
2nd Qtr 2009 lbs removed 6.8 0.2 3.7 2.8 13.5
Total lbs Chloroform Removed 56.1 16.9 208.6 130.6 412.2
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
5540.12 6/30/2009 67.25
Water Levels and Data over Time
White Mesa Mill Welt 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
5569.02 6/30/2009 56.41
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
5597.92 6/30/2009 46.80
TabJ
EXPLANATION
perched monitoring well ehowing
concentrelion in eDit
temporary perched monitoring well
chewing concentration in alit
perched piezemeter net rempled
perched menuterueg well netelled April 2005
showing concentratioe ie uGh
temporary perched monitoring well installed
April 2005 showing coocnooation in sOrt
temporary perched monitoring well inntolled
May 2007 showing cencentratinn in sOil
NOTES ND not detected NS not gannped
T37S
T38S
KRIGED 2nd QUARTER 2009 CHLOROFORM uG/L
WHITE MESA SITE
H/71 8DDD/mugD9/ch0609csrt
HYDRO
GEO
CHEM INC
TabK
MW-4 Chloroform
ugIl
Carbon
tetrachloride
ugh
Chloromethane
ug/l
Methylene
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
26Mar02 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
25 May-05 3170 7.1
31-Aug05 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
ug/l
Carbon
tetrachloride
ugIl
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/l
Chloride
mg/I
17-Nov04 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-Jun07 2000 1.8 45
15-Aug07 2600 1.9 6.2 47
10-Oct07 2300 1.7 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
23-Jun-09 1800 1.3 5.2 34
TW4-1 Chloroform
ugh
Carbon
tetrachioride
ugh
Chioromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
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
8-Nov-01 3200 12.4
26-Mar02 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-Nov-04 3000 11.1
16-Mar-05 2700 9.1
25-May-05 3080 10.6
31-Aug-05 2900 10 10 10 9.8
1-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
10Oct07 2000 1.3 7.8 43
26-Mar08 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
24-Jun-09 1500 6.9 37
TW4-2 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ug/l
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
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-Aug05 3900 10 10 10 8.0
1-Dec-/OS 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-/09 3100 2.2 6.5 46
24 Jun-09 2800 6.4 44
TW4-3 Chloroform
uWl
Carbon
tetrachloride
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
7Nov01 170 3.6
26Mar02 11 3.87
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-OS ND 3.7
31-Aug-OS ND 3.5
1Dec05 ND 2.3 3.3
9-Mar-06 ND 2.2 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-Feb-07 ND 3.1 22
27-Jun-07 ND 3.3 23
15-Aug-07 ND 3.1 24
10/10/2007 NI 2.8 27
26-Mar-08 ND 2.8 21
25-Jun-08 ND ci 2.8S 19
10 Sep 08 ND ci 2.66 19
15-Oct-08 ND 2.63 22
4-Mar09 ND ccl 2.S 21
24-Jun-09 ND ci ccl 2.9 20
TW4-4 Chloroform
ug/l
Carbon
tetrachloride
ug/l
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
6-Jun-00 ND
2-Sep-00 ND
28-Nov-00 3.85
28 Mar-01 2260 1.02
20Jun01 3100 14.5
20 Sep 01 3200 14
Nov-01 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
31-Aug-05 3200 10 10 10 11.3
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-Nov-06 2670 1.7 10.1 49
28Feb07 2200 1.5 49
27Jun07 2400 1.7 9.4 47
15-Aug-07 2700 1.5 9.5 45
10-Oct-07 2500 1.5 9.5 47
26-Mar-08 2800 1.6 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
24-Jun-09 1800 1.2 8.2 34
TW4-5 Chloroform
ugIl
Carbon
tetrachloride
ug/l
Chloromethane
ugh
Methylene
Chloride
ugfl
Nitrate
mg/I
Chloride
mg/I
20-Dec-99 29.5
15-Mar-00 49
2-Sep-00 124
29-Nov-00 255
28Mar01 236
20 Jun 01 240
20 Sep-01 240
7-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
Nov 03 240
29Mar04 210
22-Jun-04 200
17-Sep-04 150
17-Nov-04 180
16-Mar-05 120
25-May-05 113
31 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
14-Jun-06 51 2.5 2.5 5.9 51
20-Jul-06 53.7 6.7 54
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-Mar-08 11 7.4 36
25-Jun-08 9.3 8.7 37
10-Sep-08 11 7.91 34
15-Oct-08 10 cl 9.3 37
4-Mar-09 12 7.9 34
24-Jun-09 13 7.5 37
TW4-6 Chloroform
ugh
Carbon
tetrachloride
ugfl
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/l
Chloride
mg/i
6JunOO 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
7Nov01 1.00 ND
26-Mar-02 ND ND
21-May-02 ND ND
12-Sep-02 ND ND
24-Nov-02 ND ND
28-Mar-03 ND 0.1
23-Jun-03 ND ND
12 Sep-03 ND ND
Nov-03 ND ND
29 Mar 04 ND ND
22-Jun 04 ND ND
17-Sep04 ND ND
17-Nov-04 ND ND
16-Mar-05 ND 0.2
25-May-OS ND 0.4
31 Aug-05 105 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
8-Nov-06 42.8 1.4 65
28Feb07 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 cl 1.1 33
25-Jun-08 24 0.9 3S
10-Sep-08 39 1.14 3S
15-Oct-08 37 cl 1.01 33
11-Mar-09 81 2.2 35
24-Jun-09 120 2.7 37
TW4-7 Chloroform
ng/l
Carbon
tetrachioride
ng/l
Chioromethane
ugh
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
20Jun01 1100 2.65
20 Sep 01 1200 3.38
8-Nov-01 1100 2.5
26-Mar-02 1500 3.76
23-May-02 1600 3.89
12-Sep-02 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
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
16-Mar-05 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
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-Jun-08 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
24-Jun-09 1400 3.8 37
TW4-8 Chloroform
ugh
Carbon
tetrachioride
ugh
Chloromethane
uWl
Methylene
Chloride
ugh
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
20Sep01 180 0.35
7Nov01 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-Aug05 1.1 ND
1-Dec-OS ND 1.7 ND
9-Mar-06 1.3 0.3 39
14-Jun-06 ND 2.1 ND 37
20 Jul-06 ND 1.8 0.1 39
8-Nov-06 ND ND 40
28-Feb 07 2.50 0.7 39
27-Jun-07 2.5 0.2 42
15-Aug-07 1.5 ND 42
10-Oct-07 3.5 0.5 43
26-Mar-08 ND 0.1 46
25-Jun-08 ND ND 45
10-Sep-08 ND ND 39
15-Oct-08 ND ND 44
4Mar-09 ND ND 42
24-Jun-09 ND ND 44
TW4-9 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
ug/l
Methylene
Chloride
ugh
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
16Mar05 3.8 1.3
25 May-05 1.2 1.3
31-Aug-OS ND 2.9 1.3
1-Dec-OS ND 1.3
9-Mar-06 ND 2.6 1.5 38
14-Jun06 ND 2.7 1.5 39
20 Jul-06 ND 0.9 41
8-Nov-06 ND 0.7 44
28-Feb-07 ND 0.6 44
27-Jun-07 21 1.3 42
15-Aug-07 9.5 1.8 38
10-Oct-07 8.7 40
26-Mar08 1.3 2.1 35
25-Jun08 1.0 2.3 35
10Sep08 ND 2.79 28
15Oct08 ND 1.99 58
4-Mar-09 ND 2.5 30
24-Jun 09 ND 2.3 30
TW4-1O Chloroform
ug/l
Carbon
tetraehloride
ug/l
Chioromethane
uWl
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/l
21-Jan02 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-Jun03 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-Aug05 110 1.1
1-Dec 05 300 2.5 2.5 6.2 3.3
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-Jun07 350 5.1 54
15 Aug-07 660 7.3 59
10-Oct-07 470 6.7 59
26-Mar-08 620 cl 7.3 55
25-Jun-08 720 9.91 58
10-Sep-08 680 9.23 51
15Oct08 1200 10.5 61
11-Mar-09 1100 11.6 64
24-Jun-09 1200 9.8 62
TW4-11 Chloroform
ugIl
Carbon
tetrachlonde
ugfl
Chloromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/i
Chloride
mg/I
21 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
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-Aug05 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-Jun07 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 cl 7.93 42
15-Oct 08 1000 9.46 47
11-Mar-09 1100 7.3 49
24-Jun--09 980 cl cl 6.8 44
TW4-12 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethanc
ugh
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mgh
12-Sep-02 1.5 2.54
24 Nov-02 ND 2.2
28Mar03 ND 1.9
23-Jun-03 ND 1.8
12-Sep-03 ND 1.8
9-Nov-03 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
14-Jun-06 ND 1.4 16
20-Jul-06 ND 1.4 16
8-Nov-06 ND ci 1.4 16
28-Feb-07 ND 1.5 16
27 Jun-07 ND 15 18
Aug-15-07 ND 1.4 29
10Oct07 ND 1.4 16
26-Mar-08 ND 1.6 16
25-Jun-08 ND 2.69 19
10Sep08 ND 2.6S 18
15-Oct-08 ND 2.47 22
4-Mar-09 ND 2.4 23
24-Jun-09 ND 3.8 22
TW4-13 Chloroform
ag/i
Carbon
tetrachloride
ag/I
Chioromethane
ag/i
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/i
12-Sep 02 ND ND
24 Nov 02 ND ND
28-Mar-03 ND 0.2
23-Jun-03 ND 0.2
12-Sep-03 ND ND
9-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-OS ND 4.3
31-Aug-OS ND 3.1 4.6
1-Dec-OS ND 4.3
9-Mar-06 ND 1.7 4.2 67
14-Jun-06 ND 1.4 4.9 66
20-Jul-06 ND 4.3 65
8-Nov-06 ND 0.8 33
28-Feb-07 ND ci cl 59
27-Jun-07 ND ci 4.6 59
15 Aug-07 ND ci ccl 4.4 58
10-Oct-07 ND ci 4.1 58
26-Mar-08 ND ci 3.8 54
25-Jun-08 ND ci ci 4.24 58
10-Sep-08 ND ci 4.26 50
15 Oct-08 ND ci 4.63 58
4-Mar09 ND ci ci ci 3.7 58
24-Jun-09 ND ci ci ci 1.2 57
TW4-14 Chloroform
ngIl
Carbon
tetrachloride
ugIl
Chloromethane
ugIl
Methylene
Chloride
ugll
Nitrate
mgIl
Chloride
mg/I
8-Nov-06 ND ND ND ND 2.4 37
28Feb07 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
25-Jun-08 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
4-Mar-09 ND ND ND ND 1.6 35
24-Jun-09 ND ND ND ND 1.4 36
TW4-15
MW-26 Chloroform
ugIl
Carbon
tetrachloride
ugfl
Chloromethane
ugh
Methylene
Chloride
ugIl
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
29Oct03 3100 3.1
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
20-Jul-06 2170 50 50 50 1.4 65
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
10-Oct-07 2000 14 0.6 57
26Mar08 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
24-Jun-09 410 12 0.2 48
TW4-16 Chloroform
ag/i
Carbon
tetrachloride
ugIl
Chioromethane
ag/i
Methylene
Chloride
ag/I
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
31-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
15-Aug-07 7.10 5.1 5.4 66
10-Oct-07 1.40 4.4 69
26-Mar-08 11.00 26 ND 52
25 Jun-08 ND 1.46 58
10Sep08 10.00 14 10.5 71
15-Oct-08 3.9 6.6 9.82 89
4-Mar-09 ND 9.6 78
24-Jun-09 ND 8.9 76
TW4-17
MW-32
Chloroform
ugh
Carbon
tetrachloride
ag/i
Chloromethane
ugh
Methylene
Chloride
ag/I
Nitrate
mg/I
Chloride
mg/i
12-Sep-02 1.6 ND
24-Nov-U2 ND NI
28-Mar-03 ND ND
23-Jun-03 ND ND
12-Sep-03 ND ND
8Nov03 ND ND
29-Mar 04 ND ND
22-Jun-04 ND ND
17-Sep-04 ND ND
17-Nov-04 ND ND
16-Mar-OS ND ND
30-Mar-OS ND ND
25-May-05 ND ND
31-Aug-OS ND 3.2 ND
1-Dec05 ND ND 32
9Mar06 ND ND 30
14 Jun-06 ND 3.5 ND 32
20-Jul-06 ND 1.8 ND 31
8-Nov-06 ND 1.5 ND 32
28-Feb-07 ND ND 32
27-Jun-07 ND ND 31
15-Aug-07 ND ND 32
10Oct07 ND ND 31
26-Mar-08 ND ND 29
25-Jun-08 ND ND 30
10-Sep-08 ND ND 26
15-Oct-08 ND ND 30
4-Mar-09 ND ND 31
TW4-18 Chloroform
ug/l
Carbon
tetrachloride
ugIl
Chloromethane
ug/l
Methylene
Chloride
ugIl
Nitrate
mg/I
Chloride
mg/I
12-Sep-02 440 1.49
24-Nov-02 240 13.3
28-Mar-03 160 13.1
23Jun03 110 19
12 Sep 03 68 19.9
Nov 03 84 20.7
29-Mar-04 90 14
22-Jun-04 82 12.2
17-Sep-04 38 14.5
17-Nov-04 51 17.3
16-Mar-05 38 14.1
25-May-05 29.8 12.9
31-Aug-05 39 13.3
1-Dec-05 14 2.8 7.3
9-Mar-06 12 1.1 5.9 5.9
14-Jun-06 12 1.6 4.7 35
20-Jul-06 10.80 cl 2.7 6.1 35
Nov 06 139.00 8.7 34
28 Feb-07 9.2 ci 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
15-Oct-08 9.4 515 30
4-Mar-09 11.0 5.2 29
24Jun09 16.0 ci ci 6.2 30
TW4-19 Chloroform
ug/l
Carbon
tetrachloride
ug/l
Chloromethane
ugIl
Methylene
Chloride
ugh
Nitrate
mgIl
Chloride
mgIl
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
16-Aug-04 7100 9.91
17-Sep 04 2600 4.5
17-Nov-04 1800 3.6
16Mar05 2200 5.3
25 May 05 1200 5.7
31-Aug-05 1400 4.6
1-Dec-05 2800 50 50 50 ND
9-Mar-06 1200 50 50 50 4.0 86
14Jun06 1100 50 50 50 5.2 116
20Jul06 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-Oct-08 1100 1.9 132
26Mar08 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
24-Jun-09 990 1.2 2.4 132
TW4-20 Chloroform
ugIl
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
25-May-05 39000 NS NS NS 10.1 NS
31-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-08 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
24-Jun-09 6800 4.9 ND 4.2 2.9 164
TW4-21 Chloroform
ugh
Carbon
tetrachionde
ugh
Chioromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/i
25-May-05 192 NS NS NS 14.6 NS
31 Aug-05 78 ND ND ND 10.1 NS
1-Dec 05 86 ND 1.0 ND 9.6 353
9-Mar-06 120 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
24-Jun-09 200 ND ND ND 8.1 291
TW4-22 Chloroform
ugh
Carbon
tetrachionde
ugh
Chloromethane
ugh
Methylene
Chloride
ugh
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
Dec-05 320 ND ND ND 15.1 263
9-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-08 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
24-Jun-09 730 ND ND ND 20.6 177
TW4-23 Chloroform
ug/l
Carbon
tetrachloride
ng/l
Chloromethane
ugIl
Methylene
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
26Mar08 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
24-Jun-09 ND ND ND ND ND 43
TW4-24 Chloroform
ug/l
Carbon
tetrachloride
ugh
Chloromethane
ng/l
Methylene
Chloride
ugh
Nitrate
mgIl
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-10-08 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
11Mar09 1.4 ND ND ND 30.5 1010
24Jun09 1.5 ND ND ND 30.4 759
TW4-25 Chloroform
ugh
Carbon
tetrachloride
ug/1
Chioromethane
ugh
Methylene
Chloride
ng/l
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
26Mar08 ND ND ND ND 18.7 374
25-Jun-08 ND ND ND ND 22.1 344
10-Sep-08 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
24-Jun-09 ND ND ND ND 15.3 328