DRC-2009-006929_2 - 0901a06880154451

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
4th Quarter October through December
2008
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 2008
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 4th
Quarter 2008 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 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 4th Quarter
2008 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 4th Quarter 2008
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 4th
Quarter 2008 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 Quarter 2007 Since that estimation the
mass removed by-well for each quarter has been compiled in the table below indicating that
total of 388.7 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
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
Total lbs Chloroform Removed 47.6 16.3 200.6 124.2 388.7
TabF
-I
CD
-orP eP Ga rt
CD -9 -I
CD
ft
be
l
o
w
MP
01
0Th
01
0
1
0
1
0
1
0
1
00
0
0
0
0
0
0
0
0
.-J
.
-
4
-4
bo
NJ
00
0
1
Ni
9/
1
3
/
2
0
0
7
10
/
4
/
2
0
0
7
10
/
2
5
/
2
0
0
7
11
/
1
5
/
2
0
0
7
12
/
6
/
2
0
0
7
12
/
2
7
/
2
0
0
7
1/
1
7
/
2
0
0
8
2/
7
/
2
0
0
8
2/
2
8
/
2
0
0
8
3/
2
0
/
2
0
0
8
4/
1
0
/
2
0
0
8
5/
1
/
2
0
0
8
5/
2
2
/
2
0
0
8
6/
1
2
/
2
0
0
8
7/
3
/
2
0
0
8
7/
2
4
/
2
0
0
8
8/
1
4
/
2
0
0
8
9/
4
/
2
0
0
8
9/
2
5
/
2
0
0
8
-f NJ
CD rP eP
-a CD -I
CD
ft
be
l
o
w
MP
01
In
In
tn
I
n
01
In
In
.-.J
-J
--J
01
0
1
0
1
In
Kb
bo
bI
ri
bo
o
9/
1
3
/
2
0
0
7
10
/
4
/
2
0
0
7
10
/
2
5
/
2
0
0
7
11
/
1
5
/
2
0
0
7
12
/
6
/
2
0
0
7
12
/
2
7
/
2
0
0
7
1/
1
7
/
2
0
0
8
2/
7
/
2
0
0
8
2/
2
8
/
2
0
0
8
3/
2
0
/
2
0
0
8
4/
1
0
/
2
0
0
8
5/
1
/
2
0
0
8
5/
2
2
/
2
0
0
8
6/
1
2
/
2
0
0
8
7/
3
/
2
0
0
8
7/
2
4
/
2
0
0
8
8/
1
4
/
2
0
0
8
9/
4
/
2
0
0
8
9/
2
5
/
2
0
0
8
ft
be
l
o
w
MP
In
9/
1
3
/
2
0
0
7
10
/
4
/
2
0
0
7
__
j
10
/
2
5
/
2
0
0
7
11
/
1
5
/
2
0
0
7
12
/
6
/
2
0
0
7
12
/
2
7
/
2
0
0
7
1/
1
7
/
2
0
0
8
2/
7
/
2
0
0
8
2/
2
8
/
2
0
0
8
3/
2
0
/
2
0
0
8
4/
1
0
/
2
0
0
8
CD
5/
1
/
2
0
0
8
5/
2
2
/
2
0
0
8
-1
6/
1
2
/
2
0
0
8
__
7/
3
/
2
0
0
8
7/
2
4
/
2
0
0
8
CD
8/
1
4
/
2
0
0
8
9/
4
/
2
0
0
8
9/
2
5
/
2
0
0
8
TabG
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 10/14/2008 67.80
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
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
TabJ
--
EXPLANATION
perched monitoring well showing
concentration in uGh
temporary perched monitoring well
showing concentration in nod
perched piezometer net sampled
perched maniterieg well installed April 2505
shaming concentration in aG/I HY.DRO
tamporary perched monitaring melt instellad GEO
April 2005 showing concentratian in aG/I
temporary perched masitaring melt isatalled CHE4I INC
Map 2007 shaming csnceatrnticn in sO/I
T37S
T38S
NOTES ND not detected NS not satttped NA not
3rd Ouarter 2008 value tor TW4-20 used in con
KRIGED 4th QUARTER 2008 CHLOROFORM uG/L
WHITE MESA SITE
H/718000/obOg/ch1 108c.srt
TabK
MW-4 Chloroform
ug/l
Carbon
tetrachloride
ugh
Chloromethane
ag/I
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
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
25-May 05 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
ag/i
Carbon
tetrachioride
ugh
Chioromethane
ugh
Methylene
Chloride
ug/l
Nitrate
mg/i
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
Mar-06 3100 50 50 50 49
14 Jun-06 3000 50 50 50 49
28 Feb-07 2300 1.6 6.3 47
27-Jun-07 2000 1.8 45
15-Aug-07 2600 1.9 6.2 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 cl 6.09 42
10-Sep 08 1800 1.8 6.36 35
10/15/2008 2100 1.7 cl 5.86 45
TW4-1 Chloroform
ugll
Carbon
tetrachioride
ugh
Chloromethane
uWI
Methylene
Chloride
ugll
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
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-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-Nov-04 3000 11.1
16Mar05 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
8Nov06 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
TW4-2 Chloroform
ug/l
Carbon
tetrachloride
ag/I
Chloromethane
ag/I
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
10-Nov99 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
1-Dec /05 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-Jun07 3000 2.5 7.8 50
15-Aug07 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
TW4-3 Chloroform
ugh
Carbon
tetrachloride
ugIl
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 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-05 ND 3.7
31-Aug05 ND 3.5
1-Dec-OS ND ci 2.3 3.3
9-Mar-06 ND 2.2 3.3 26
14-Jun-06 ND cl ci 3.2 26
20-Jul-06 ND 1.6 2.9 26
8-Nov06 ND ci 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 ND 2.8 27
26-Mar-08 ND 2.8 21
25-Jun-08 ND 2.85 19
10-Sep-08 ND 2.66 19
15-Oct-08 ND 2.63 22
TW4-4 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
uWl
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
6JunOO 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
8-Nov-01 2900 14.8
26-Mar-02 3400 15
22 May 02 3200 13.2
12-Sep 02 4000 13.4
24Nov02 3800 12.6
28 Mar-03 3300 13.4
23-Jun 03 3600 12.8
12-Sep-03 2900 12.3
8-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 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
TW4-5 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromcthane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/i
20-Dec-99 29.5
15-Mar 00 49
2SepO0 124
29 Nov-00 255
28-Mar-01 236
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
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
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
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 ci 8.7 37
10-Sep-08 11 7.91 34
15-Oct-08 10 9.3 37
TW4-6 Chloroform
ugh
Carbon
tetrachioride
ugh
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/I
Jun-00 ND
2SepOO ND
28 Nov-00 ND ND
26-Mar-01 ND .13
20-Jun-01 ND ND
20-Sep-01 3.6 ND
7-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
28-Mar 03 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-05 ND 0.4
31-Aug05 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
8-Nov06 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-Mar-08 52 1.1 33
25-Jun-08 24 0.9 35
10 Sep-08 39 1.14 35
15 Oct-08 37 1.01 33
TW4-7 Chloroform
ug/l
Carbon
tetrachionde
ugh
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/I
Chloride
mg/I
29-Nov-99 256
15-Mar-UU bib
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
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
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
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
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-Jun-08 1800 1.3 4.8 43
10-Sep-08 1600 1.4 4.16 35
15-Oct-08 1900 4.01 40
TW4-8 Chloroform
ug/l
Carbon
tetrachloride
ug/l
Chioromethane
ugh
Methyiene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
29-Nov-99 ND
15-Mar-U0 21.S
2-Sep 00 102
29 Nov-00 107 ND
26 Mar-01 116 ND
20-Jun-01 180 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 2.1 ND 37
20-Jul-06 ND 1.8 0.1 39
8-Nov-06 ND ci ND 40
28-Feb-07 2.50 0.7 39
27Jun07 2.5 0.2 42
15-Aug07 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
TW4-9 Chloroform
ugil
Carbon
tetrachlonde
ug/l
Chloromethane
ugIl
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
16-Mar05 3.8 1.3
25May05 1.2 1.3
31-Aug-OS ND 2.9 1.3
1-Dec-OS ND ci 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
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-Mar-08 1.3 2.1 35
25-Jun-08 1.0 2.3 35
10Sep08 ND 2.79 28
15-Oct-08 ND 1.99 58
TW4-1O Chloroform
ugh
Carbon
tetrachioride
ugh
Chioromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/I
21-Jan-02 14
2b-Mar-U2 lb U.14
21-May02 17 0.11
12Sep02 6.0 ND
24Nov02 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
14Jun06 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
28Feb07 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
TW4-11 Chloroform
ng/l
Carbon
tetrachloride
ug/l
Chioromethane
uWl
Methylene
Chloride
ugh
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
8-Nov-03 5200 9.3
29-Mar 04 5300 9.07
22-Jun 04 5700 8.74
17-Sep-04 4800 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
28Feb07 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-Mar08 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
TW4-12 Chloroform
ugIl
Carbon
tetrachloride
ugh
Chloromethane
ug/l
Methylene
Chloride
ug/l
Nitrate
mg/i
Chloride
mg/i
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-OS 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 1.4 16
28-Feb-07 ND 1.5 16
27Jun07 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
10 Sep-08 ND 2.65 18
15-Oct-08 ND 2.47 22
TW4-13 Chloroform
ug/i
Carbon
tetrachionde
ugh
Chioromethane
ug/1
Methylene
Chloride
ug/i
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-05 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
28Feb07 ND 59
27Jun07 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
TW4-14 Chloroform
ug/l
Carbon
tetrachloride
ug/l
Chloromethane
ug/l
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
8-Nov-06 ND ND ND ND 2.4 37
28-Feb-07 ND ND ND ND 2.3 38
27Jun07 ND ND ND ND 1.4 38
15-Aug07 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
TW4-15
MW-26 Chloroform
ag/i
Carbon
tetrachioride
ag/i
Chioromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
12-Sep-02 2.6 ND
24Nov02 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
8Nov06 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
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
TW4-16 Chloroform
ugh
Carbon
tetrachioride
ugh
Chioromethane
ugh
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
31 Aug-05 85 3.2 43 ND
1-Dec-05 14 2.6 5.9 1.4
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
10-Sep-08 10.00 14 10.5 71
15-Oct-08 3.9 6.6 9.82 89
TW4-17
MW-32
Chloroform
ug/l
Carbon
tetrachloride
Chloromethane
ug/l
Methylene
Chionde Nitrate
mg/I
Chloride
mg/I
12Sep02 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-05 ND ND
25 May-05 ND ND
31 Aug-05 ND 3.2 ND
iDec-OS ND ND 32
9-Mar06 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
10-Oct07 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
TW4-18 Chloroform
ag/i
Carbon
tetrachioride
/i
Chloromethanc
ag/i
Methylene
Chloride
ag/I
Nitrate
mg/i
Chloride
mg/i
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
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 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
15Aug07 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
TW4-19 Chloroform
ugh
Carbon
tetrachloride
ugh
Chioromethane
ag/i
Methylene
Chloride
ugh
Nitrate
mg/i
Chloride
mg/i
12-Sep-02 7700 47.6
24-Nov-02 5400 42
28-Mar-03 4200 61.4
15 May-03 4700 NA
23 Jun03 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 cS .cS 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
20-Jul06 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
TW4-20 Chloroform
ugh
Carbon
tetrachloride
ugh
Chloromethane
ugh
Methylene
Chloride
ugh
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
9-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
Nov-06 11000 7.1 1.9 2.2 3.5 124
28Feb07 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-Jun08 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
TW4-21 Chloroform
ugh
Carbon
tetrachloride
ugfl
Chloromethane
ng/l
Methylene
Chloride
ng/l
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
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
TW4-22 Chloroform
ng/l
Carbon
tetrachloride
ug/l
Chloromethane
uWl
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/I
25-May-05 340 NS NS NS 18.2 NS
31 Aug US 290 ND ND ND 15.7 NS
1-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 S30 ND ND ND 19.3 2S9
Oct-10-08 440 ND ND ND 18.8 238
26-Mar-08 1400 ND ND ND 39.1 S19
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 S39
TW4-23 Chloroform
ugh
Carbon
tetrachloride
ugh
Chioromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/I
Chloride
mg/i
06/27/07 ND ND ND ND ND 47
Aug 15-07 ND ND ND ND ND 46
OctlOO8 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
TW4-24 Chloroform
ugh
Carbon
tetrachloride
ug/1
Chloromethane
ugh
Methylene
Chloride
ugh
Nitrate
mg/I
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
25Jun08 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
TW4-25 Chloroform
ugil
Carbon
tetrachloride
nghl
Chloromethane
ugh
Methylene
Chloride
ugfl
Nitrate
mg/I
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
10 Sep-08 ND ND ND ND 18.8 333
15-Oct-08 ND ND ND ND 21.3 366