ML18082A028

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WSRC-MS-2004-00004, Rev. 0, Z-Area Groundwater Monitoring Report for 2003
ML18082A028
Person / Time
Site: PROJ0734
Issue date: 01/05/2004
From:
Office of Nuclear Material Safety and Safeguards
To:
HDFelsher NMSS/DUWP/LLWB 415.6559 T5A39
References
WSRC-MS-2004-00004, Rev. 0
Download: ML18082A028 (17)
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Text

Z-AREA GROUNDWATER MONITORING REPORT FOR 2003 (U)

WSRC-MS-2004-00004 January 5, 2004

WSRC-MS-2004-00004 PAGE 2 of 17 2

Introduction In accordance with SRS Z-Area Saltstone Industrial Solid Waste Permit, #025500-1603, wells ZBG-1, ZBG-1A and ZBG-2 are monitored for the parameters listed below:

pH Specific Conductance Water level Arsenic Antimony Barium Cadmium Chromium Lead Mercury Nitrate as Nitrogen Nitrite as Nitrogen Selenium Silver Benzene and Toluene Radium 226 and 228 (sum)

Gross alpha Nonvolatile beta New wells ZBG-3, ZBG-4 and ZBG-5 were also monitored although the permit has not yet been modified to include them. Sampling was done during the first and third quarters of 2003. The well sampling and analyses were conducted in accordance with Procedure Manual 3Q5, Hydrogeologic Data Collection. The analytical results are attached. The sampling did not reveal any evidence of a release from the Saltstone vaults. Flow directions and velocities were similar to those observed in past years.

Flow Direction and Rate Potentiometric surface maps for the water table aquifer were constructed using first and third quarter data. The general shape of the potentiometric contour lines is known from years of monitoring, but the 2003 data are interesting in that they show the response of the aquifer to recharge after years of drought conditions. During the 4 months between sampling events, water levels within Z Area rose by as much as 5 feet and there was a noticeable steepening of the hydraulic gradient.

The change in gradient led to an increase in flow velocity. Flow rate can be estimated using the following equation:

Flow(ft/day)= Hydraulic Conductivity (ft/day) x dh(ft)

Porosity (unitless) dl(ft)

Where the hydraulic conductivity constant is 1.7 ft/day, the effective porosity value is 30 percent, the change in head is dh, and the horizontal distance is simply the distance between potentiometric contours (figures 2 and 3).

For first quarter of 2002, the calculation is as follows:

1.7 ft/day x 15 ft = 0.062 ft/day or 23 ft/year 0.30 1360 ft

WSRC-MS-2004-00004 PAGE 3 of 17 3

For third quarter of 2002, the calculation is as follows:

1.7 ft/day x 20 ft = 0.11 ft/day or 40 ft/year 0.30 1000 ft Analytical results Nitrate/nitrite and tritium were detected in downgradient wells, but higher concentrations were found in background well ZBG-1. Therefore the downgradient detections do not represent evidence of a release from the vaults.

All samples collected from ZBG-4 and ZBG-5 contained elevated levels of chromium (as high as 188.7 ppb). The chromium was probably derived from native clays. This theory is supported by several lines of evidence:

-There is no known source of potential contamination upgradient of the wells. The closest saltstone cells are empty.

-The original samples were turbid, and showed a strong correlation between turbidity and chromium (Table 1).

Table 1. Turbidity and chromium results for ZBG-4 and ZBG-5.

WELL QUARTER Cr (ppb)

Tubidity (ntu)

ZBG-4 1st 188.7 745 ZBG-5 3rd 129.9 630 ZBG-4 3rd 44.2 185 ZBG-5 1st 23.4 81 To further test the connection to turbidity, turbid confirmatory samples were collected in December. The unfiltered samples had chromium levels as high as 230 ppb, but field filtering eliminated the chromium in one sample and dropped it below the practical quantitation limit in another. If the chromium were dissolved in the groundwater, filtering might remove some of it through adsorption, but a concentration drop of the magnitude observed would only be expected if the chromium were present in suspended clay particles that could be physically removed by filtering.

-Even though the unfiltered December samples contained high concentrations of chromium, the proportion of chromium to other naturally occurring metals was unremarkable. Ratios of chromium to aluminum and chromium to manganese were well within the normal range (based on historical data from ZBG-1 and ZBG-2). The Cr/Al ratios ranged from.0029 to

.0436 compared to historical ranges of.036 to.132. The Cr/Mn ratios ranged from.165 to

.378 compared to historical ratios of.383 to.4. The ratios would be higher if the water or the sediments surrounding ZBG-4 and ZBG-5 had been contaminated with chromium from some anthropogenic source.

Elevated chromium concentrations may continue to appear in ZBG-4 and 5. These wells were installed in a clayey zone because that zone contained the watertable surface at the time of their installation. But as the sandier upper protions of the screen zones experience recharge, it is hoped that turbidity and chromium will decrease in the well samples.

WSRC-MS-2004-00004 PAGE 4 of 17 4

Figure 1. Monitoring wells at Z Area.

WSRC-MS-2004-00004 PAGE 5 of 17 5

WSRC-MS-2004-00004 PAGE 6 of 17 6

Figure 2. Water elevation data in Z-Area for first quarter of 2003.

WSRC-MS-2004-00004 PAGE 7 of 17 7

Figure 3. Water elevation data in Z-Area for third quarter of 2003.

Table 2. Analytical data for 2003.

WELL DATE ANALYTE_NAME METHOD MDL PQL QUALIFIER RESULT UNITS ZBG 1 4/2/2003 0:00 ANTIMONY EPA6010B 8

80 J 16.7 ug/L ZBG 1 8/13/2003 0:00 ANTIMONY EPA6010B 8

80 U 80 ug/L ZBG 1 8/13/2003 0:00 ANTIMONY EPA6010B 8

80 U 80 ug/L ZBG 1A 3/19/2003 0:00 ANTIMONY EPA6010B 8

80 J 21.25 ug/L ZBG 2 3/19/2003 0:00 ANTIMONY EPA6010B 8

80 J 12.99 ug/L ZBG 2 8/13/2003 0:00 ANTIMONY EPA6010B 8

80 U 80 ug/L ZBG 3 3/18/2003 0:00 ANTIMONY EPA6010B 8

80 J 15.06 ug/L ZBG 3 8/13/2003 0:00 ANTIMONY EPA6010B 8

80 U 80 ug/L ZBG 4 4/1/2003 0:00 ANTIMONY EPA6010B 8

80 J 23.28 ug/L ZBG 4 8/13/2003 0:00 ANTIMONY EPA6010B 8

80 U 80 ug/L ZBG 5 4/1/2003 0:00 ANTIMONY EPA6010B 8

80 J 21.46 ug/L ZBG 5 8/13/2003 0:00 ANTIMONY EPA6010B 8

80 U 80 ug/L ZBG 1 4/2/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 1 8/13/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 1 8/13/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 1A 3/19/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 2 3/19/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 2 8/13/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 3 3/18/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 3 8/13/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 4 4/1/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 4 8/13/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 5 4/1/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 5 8/13/2003 0:00 ARSENIC EPA6010B 4

40 U 40 ug/L ZBG 1 4/2/2003 0:00 BARIUM EPA6010B 1

10 41.42 ug/L ZBG 1 8/13/2003 0:00 BARIUM EPA6010B 1

10 17.56 ug/L ZBG 1 8/13/2003 0:00 BARIUM EPA6010B 1

10 16.24 ug/L ZBG 1A 3/19/2003 0:00 BARIUM EPA6010B 1

10 22.68 ug/L ZBG 2 3/19/2003 0:00 BARIUM EPA6010B 1

10 17.34 ug/L ZBG 2 8/13/2003 0:00 BARIUM EPA6010B 1

10 18.83 ug/L ZBG 3 3/18/2003 0:00 BARIUM EPA6010B 1

10 J 7.333 ug/L ZBG 3 8/13/2003 0:00 BARIUM EPA6010B 1

10 J 4.825 ug/L ZBG 4 4/1/2003 0:00 BARIUM EPA6010B 1

10 1487 ug/L ZBG 4 8/13/2003 0:00 BARIUM EPA6010B 1

10 196.5 ug/L ZBG 5 4/1/2003 0:00 BARIUM EPA6010B 1

10 188.9 ug/L ZBG 5 8/13/2003 0:00 BARIUM EPA6010B 1

10 581 ug/L ZBG 1 4/2/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 1 8/13/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 1A 3/19/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 2 3/19/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 2 8/13/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 3 3/18/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 3 3/18/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 3 8/13/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 4 4/1/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 4 8/13/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 5 4/1/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 5 8/13/2003 0:00 BENZENE EPA8260B 0.33 1 U 1 ug/L ZBG 1 4/2/2003 0:00 CADMIUM EPA6010B 0.1 1 J 0.5488 ug/L ZBG 1 8/13/2003 0:00 CADMIUM EPA6010B 0.1 1 J 0.9714 ug/L ZBG 1 8/13/2003 0:00 CADMIUM EPA6010B 0.1 1 J 0.1985 ug/L ZBG 1A 3/19/2003 0:00 CADMIUM EPA6010B 0.1 1

2.355 ug/L ZBG 2 3/19/2003 0:00 CADMIUM EPA6010B 0.1 1 J 0.2353 ug/L ZBG 2 8/13/2003 0:00 CADMIUM EPA6010B 0.1 1 J 0.2349 ug/L ZBG 3 3/18/2003 0:00 CADMIUM EPA6010B 0.1 1

1.38 ug/L ZBG 3 8/13/2003 0:00 CADMIUM EPA6010B 0.1 1

1.267 ug/L ZBG 4 4/1/2003 0:00 CADMIUM EPA6010B 0.1 1

1.8 ug/L ZBG 4 8/13/2003 0:00 CADMIUM EPA6010B 0.1 1 J 0.9091 ug/L ZBG 5 4/1/2003 0:00 CADMIUM EPA6010B 0.1 1

2.249 ug/L ZBG 5 8/13/2003 0:00 CADMIUM EPA6010B 0.1 1

3.455 ug/L ZBG 1 4/2/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 6.599 ug/L ZBG 1 8/13/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 2.631 ug/L ZBG 1 8/13/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 1.337 ug/L ZBG 1A 3/19/2003 0:00 CHROMIUM EPA6010B 0.9 9

11.54 ug/L ZBG 2 3/19/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 2.057 ug/L

WSRC-MS-2004-00004 PAGE 8 of 17 8

WELL DATE ANALYTE_NAME METHOD MDL PQL QUALIFIER RESULT UNITS ZBG 2 8/13/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 0.9464 ug/L ZBG 3 3/18/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 2.837 ug/L ZBG 3 8/13/2003 0:00 CHROMIUM EPA6010B 0.9 9 J 1.862 ug/L ZBG 4 4/1/2003 0:00 CHROMIUM EPA6010B 0.9 9

188.7 ug/L ZBG 4 8/13/2003 0:00 CHROMIUM EPA6010B 0.9 9

23.38 ug/L ZBG 5 4/1/2003 0:00 CHROMIUM EPA6010B 0.9 9

44.16 ug/L ZBG 5 8/13/2003 0:00 CHROMIUM EPA6010B 0.9 9

129.9 ug/L ZBG 1 4/2/2003 7:20 DEPTH_TO_WA TER 62.2 ft ZBG 1 8/13/2003 10:40 DEPTH_TO_WA TER 59.3 ft ZBG 1A 3/19/2003 8:40 DEPTH_TO_WA TER 6.3 ft ZBG 1A 8/13/2003 10:00 DEPTH_TO_WA TER 15.5 ft ZBG 2 3/19/2003 7:45 DEPTH_TO_WA TER 56.4 ft ZBG 2 8/13/2003 9:10 DEPTH_TO_WA TER 56.4 ft ZBG 3 3/18/2003 7:40 DEPTH_TO_WA TER 57.3 ft ZBG 3 8/13/2003 8:10 DEPTH_TO_WA TER 51.5 ft ZBG 4 4/1/2003 8:00 DEPTH_TO_WA TER 58.6 ft ZBG 4 8/13/2003 9:40 DEPTH_TO_WA TER 52.6 ft ZBG 5 4/1/2003 7:40 DEPTH_TO_WA TER 56.8 ft ZBG 5 8/13/2003 9:30 DEPTH_TO_WA TER 49.7 ft ZBG 1 4/2/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 1 8/13/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 1A 3/19/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 2 3/19/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 2 8/13/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 3 3/18/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 3 3/18/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 3 8/13/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 4 4/1/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 4 8/13/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 5 4/1/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 5 8/13/2003 0:00 ETHYLBENZENE EPA8260B 0.21 1 U 1 ug/L ZBG 1 4/2/2003 0:00 GROSS ALPHA 3Q1 1020 0.87 2.99 J 2.16 pCi/L ZBG 1 8/13/2003 0:00 GROSS ALPHA L3.21-10001 0.76 2.02 J 0.799 pCi/L ZBG 1A 3/19/2003 0:00 GROSS ALPHA 3Q1 1020 1.57 4.77 J 3.79 pCi/L ZBG 2 3/19/2003 0:00 GROSS ALPHA 3Q1 1020 0.93 2.21 U 0.654 pCi/L ZBG 2 8/13/2003 0:00 GROSS ALPHA L3.21-10001 0.75 2.08 J 0.893 pCi/L ZBG 3 3/18/2003 0:00 GROSS ALPHA 3Q1 1020 0.95 1.89 U 0.0505 pCi/L ZBG 3 8/13/2003 0:00 GROSS ALPHA L3.21-10001 0.78 1.64 U 0.197 pCi/L ZBG 4 4/1/2003 0:00 GROSS ALPHA 3Q1 1020 1.02 4.2 J 4.09 pCi/L ZBG 4 8/13/2003 0:00 GROSS ALPHA L3.21-10001 0.82 1.81 U 0.306 pCi/L ZBG 5 4/1/2003 0:00 GROSS ALPHA 3Q1 1020 2

6.38 J 3.8 pCi/L ZBG 5 8/13/2003 0:00 GROSS ALPHA L3.21-10001 1.3 3.11 U 0.776 pCi/L ZBG 1 4/2/2003 0:00 LEAD EPA6010B 3

30 J 22.65 ug/L ZBG 1 8/13/2003 0:00 LEAD EPA6010B 3

30 J 13.04 ug/L ZBG 1 8/13/2003 0:00 LEAD EPA6010B 3

30 J 12.83 ug/L ZBG 1A 3/19/2003 0:00 LEAD EPA6010B 3

30 J 13.45 ug/L ZBG 2 3/19/2003 0:00 LEAD EPA6010B 3

30 J 6.369 ug/L

WSRC-MS-2004-00004 PAGE 9 of 17 9

WELL DATE ANALYTE_NAME METHOD MDL PQL QUALIFIER RESULT UNITS ZBG 2 8/13/2003 0:00 LEAD EPA6010B 3

30 U 30 ug/L ZBG 3 3/18/2003 0:00 LEAD EPA6010B 3

30 J 19.92 ug/L ZBG 3 8/13/2003 0:00 LEAD EPA6010B 3

30 U 30 ug/L ZBG 4 4/1/2003 0:00 LEAD EPA6010B 3

30 41.36 ug/L ZBG 4 8/13/2003 0:00 LEAD EPA6010B 3

30 J 6.049 ug/L ZBG 5 4/1/2003 0:00 LEAD EPA6010B 3

30 J 8.785 ug/L ZBG 5 8/13/2003 0:00 LEAD EPA6010B 3

30 75.33 ug/L ZBG 1 4/2/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.01974 ug/L ZBG 1 8/13/2003 0:00 MERCURY EPA7470A 0.01 0.1 U 0.1 ug/L ZBG 1A 3/19/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.03158 ug/L ZBG 2 3/19/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.01866 ug/L ZBG 2 8/13/2003 0:00 MERCURY EPA7470A 0.01 0.1 U 0.1 ug/L ZBG 3 3/18/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.01957 ug/L ZBG 3 8/13/2003 0:00 MERCURY EPA7470A 0.01 0.1 U 0.1 ug/L ZBG 3 8/13/2003 0:00 MERCURY EPA7470A 0.01 0.1 U 0.1 ug/L ZBG 4 4/1/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.07882 ug/L ZBG 4 8/13/2003 0:00 MERCURY EPA7470A 0.01 0.1 U 0.1 ug/L ZBG 5 4/1/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.02627 ug/L ZBG 5 8/13/2003 0:00 MERCURY EPA7470A 0.01 0.1 J 0.0372 ug/L ZBG 1 4/2/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 1.6 mg/L ZBG 1 4/2/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 1.59 mg/L ZBG 1 4/2/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 1.6 mg/L ZBG 1 8/13/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.77 mg/L ZBG 1A 3/19/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 U 0.05 mg/L ZBG 2 3/19/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.83 mg/L ZBG 2 3/19/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.84 mg/L ZBG 2 8/13/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.6 mg/L ZBG 3 3/18/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.91 mg/L ZBG 3 8/13/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.9 mg/L ZBG 4 4/1/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.8 mg/L ZBG 4 8/13/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.78 mg/L ZBG 5 4/1/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.39 mg/L ZBG 5 8/13/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.23 mg/L ZBG 5 8/13/2003 0:00 NITRATE-NITRITE AS NITROGEN EPA353.1 0.01 0.05 0.22 mg/L ZBG 1 4/2/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 1 8/13/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 1A 3/19/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 2 3/19/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 2 8/13/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 3 3/18/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L

WSRC-MS-2004-00004 PAGE 10 of 17 10 WELL DATE ANALYTE_NAME METHOD MDL PQL QUALIFIER RESULT UNITS ZBG 3 3/18/2003 0:00 NITRITES EPA300.0 0.05 0.1 U 0.1 mg/L ZBG 3 8/13/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 4 4/1/2003 0:00 NITRITES EPA300.0 0.05 0.1 U 0.1 mg/L ZBG 4 4/1/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 4 8/13/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 5 4/1/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 5 8/13/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 5 8/13/2003 0:00 NITRITES EPA9056 0.05 0.1 U 0.1 mg/L ZBG 1 4/2/2003 0:00 NONV BETA 3Q1 1020 1.79 4.13 U 1.31 pCi/L ZBG 1 8/13/2003 0:00 NONV BETA L3.21-10001 1.21 2.76 U 0.705 pCi/L ZBG 1A 3/19/2003 0:00 NONV BETA 3Q1 1020 1.54 3.84 J 2.46 pCi/L ZBG 2 3/19/2003 0:00 NONV BETA 3Q1 1020 1.4 3.15 U 0.783 pCi/L ZBG 2 8/13/2003 0:00 NONV BETA L3.21-10001 1.21 2.73 U 0.705 pCi/L ZBG 3 3/18/2003 0:00 NONV BETA 3Q1 1020 1.4 3.03 U 0.328 pCi/L ZBG 3 8/13/2003 0:00 NONV BETA L3.21-10001 1.22 2.62 J 0.153 pCi/L ZBG 4 4/1/2003 0:00 NONV BETA 3Q1 1020 1.85 4.47 J 2.02 pCi/L ZBG 4 8/13/2003 0:00 NONV BETA L3.21-10001 1.25 2.61 U

-0.122 pCi/L ZBG 5 4/1/2003 0:00 NONV BETA 3Q1 1020 2.05 4.91 J 2.45 pCi/L ZBG 5 8/13/2003 0:00 NONV BETA L3.21-10001 1.43 3.18 U 0.658 pCi/L ZBG 1 4/2/2003 0:00 RADIUM-226 RADA-008 0.31 1.08 1.16 pCi/L ZBG 1 4/2/2003 0:00 RADIUM-226 RADA-008 0.21 0.82 J 0.802 pCi/L ZBG 1 8/13/2003 0:00 RADIUM-226 RADA-008 0.3 1.42 U 1.89 pCi/L ZBG 1 8/13/2003 0:00 RADIUM-226 RADA-008 0.55 1.48 J 0.976 pCi/L ZBG 1A 3/19/2003 0:00 RADIUM-226 RADA-008 0.33 1.23 1.72 pCi/L ZBG 2 3/19/2003 0:00 RADIUM-226 RADA-008 0.39 1.23 1.24 pCi/L ZBG 2 8/13/2003 0:00 RADIUM-226 RADA-008 0.59 1.67 UJ 1.33 pCi/L ZBG 3 3/18/2003 0:00 RADIUM-226 RADA-008 0.48 1.1 U 0.317 pCi/L ZBG 3 3/18/2003 0:00 RADIUM-226 RADA-008 0.64 1.34 U 0.18 pCi/L ZBG 3 8/13/2003 0:00 RADIUM-226 RADA-008 0.61 2.06 U 2.7 pCi/L ZBG 4 4/1/2003 0:00 RADIUM-226 RADA-008 0.35 1.23 1.59 pCi/L ZBG 4 8/13/2003 0:00 RADIUM-226 RADA-008 0.63 2.11 U 2.64 pCi/L ZBG 5 4/1/2003 0:00 RADIUM-226 RADA-008 0.39 0.96 J 0.441 pCi/L ZBG 5 8/13/2003 0:00 RADIUM-226 RADA-008 0.57 1.78 UJ 1.75 pCi/L ZBG 1 4/2/2003 0:00 RADIUM-228 RADA-009 1.3 2.82 U 0.14 pCi/L ZBG 1 8/13/2003 0:00 RADIUM-228 RADA-009 0.64 1.37 U 0.382 pCi/L ZBG 1A 3/19/2003 0:00 RADIUM-228 RADA-009 0.73 1.61 U 0.67 pCi/L ZBG 2 3/19/2003 0:00 RADIUM-228 RADA-009 0.71 1.55 U 0.405 pCi/L ZBG 2 3/19/2003 0:00 RADIUM-228 RADA-009 0.72 1.58 U 0.259 pCi/L ZBG 2 8/13/2003 0:00 RADIUM-228 RADA-009 1.08 2.31 U 0.353 pCi/L ZBG 3 3/18/2003 0:00 RADIUM-228 RADA-009 0.86 1.85 U 0.029 pCi/L ZBG 3 8/13/2003 0:00 RADIUM-228 RADA-009 0.68 1.49 J 0.829 pCi/L ZBG 4 4/1/2003 0:00 RADIUM-228 RADA-009 0.7 1.49 J 0.994 pCi/L ZBG 4 8/13/2003 0:00 RADIUM-228 RADA-009 0.71 1.51 U 0.324 pCi/L ZBG 5 4/1/2003 0:00 RADIUM-228 RADA-009 0.7 1.47 J 0.905 pCi/L ZBG 5 8/13/2003 0:00 RADIUM-228 RADA-009 0.73 1.59 J 0.765 pCi/L ZBG 1 4/2/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 1 8/13/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 1 8/13/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 1A 3/19/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 2 3/19/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 2 8/13/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 3 3/18/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 3 8/13/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 4 4/1/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 4 8/13/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 5 4/1/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 5 8/13/2003 0:00 SELENIUM EPA6010B 5

50 U 50 ug/L ZBG 1 4/2/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 1 8/13/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L

WSRC-MS-2004-00004 PAGE 11 of 17 11 WELL DATE ANALYTE_NAME METHOD MDL PQL QUALIFIER RESULT UNITS ZBG 1 8/13/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 1A 3/19/2003 0:00 SILVER EPA6010B 1

10 J 1.406 ug/L ZBG 2 3/19/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 2 8/13/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 3 3/18/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 3 8/13/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 4 4/1/2003 0:00 SILVER EPA6010B 1

10 J 9.747 ug/L ZBG 4 8/13/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 5 4/1/2003 0:00 SILVER EPA6010B 1

10 U 10 ug/L ZBG 5 8/13/2003 0:00 SILVER EPA6010B 1

10 J 7.936 ug/L ZBG 1 4/2/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 1 8/13/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 1A 3/19/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 2 3/19/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 2 8/13/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 3 3/18/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 3 3/18/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 3 8/13/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 4 4/1/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 4 8/13/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 5 4/1/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 5 8/13/2003 0:00 TOLUENE EPA8260B 0.39 1 U 1 ug/L ZBG 1 4/2/2003 0:00 TRITIUM 3Q1 1330 0.31 0.83 5.27 pCi/mL ZBG 1 8/13/2003 0:00 TRITIUM L3.21-10015 0.31 0.77 U 3.295 pCi/mL ZBG 1 8/13/2003 0:00 TRITIUM L3.21-10015 0.31 0.76 U 3.059 pCi/mL ZBG 1A 3/19/2003 0:00 TRITIUM 3Q1 1330 0.31 0.83 4.86 pCi/mL ZBG 2 3/19/2003 0:00 TRITIUM 3Q1 1330 0.31 0.78 3.78 pCi/mL ZBG 2 8/13/2003 0:00 TRITIUM L3.21-10015 0.3 0.75 U 3.239 pCi/mL ZBG 3 3/18/2003 0:00 TRITIUM 3Q1 1330 0.31 0.79 3.94 pCi/mL ZBG 3 8/13/2003 0:00 TRITIUM L3.21-10015 0.31 0.78 U 3.286 pCi/mL ZBG 4 4/1/2003 0:00 TRITIUM 3Q1 1330 0.31 0.79 3.37 pCi/mL ZBG 4 8/13/2003 0:00 TRITIUM L3.21-10015 0.3 0.73 U 2.696 pCi/mL ZBG 5 4/1/2003 0:00 TRITIUM 3Q1 1330 0.31 0.72 1.13 pCi/mL ZBG 5 8/13/2003 0:00 TRITIUM L3.21-10015 0.3 0.7 U 0.994 pCi/mL ZBG 1 4/2/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 1 8/13/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 1A 3/19/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 2 3/19/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 2 8/13/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 3 3/18/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 3 3/18/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 3 8/13/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 4 4/1/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 4 8/13/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 5 4/1/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L ZBG 5 8/13/2003 0:00 XYLENES EPA8260B 0.25 1 U 1 ug/L

WSRC-MS-2004-00004 PAGE 12 of 17 12 Table 3. Field data for 2003.

DATE WELL ANALYTE_NAME QUANTIFIER VALUE UNITS 7/10/2003 LFW 74D PH 5.6 pH 4/2/2003 ZBG 1 PH 4.9 pH 8/13/2003 ZBG 1 PH 6.9 pH 3/19/2003 ZBG 1A PH 4.6 pH 8/13/2003 ZBG 1A PH 0 pH 3/19/2003 ZBG 2 PH 4 pH 8/13/2003 ZBG 2 PH 21.1 pH 3/18/2003 ZBG 3 PH 4.7 pH 8/13/2003 ZBG 3 PH 6 pH 4/1/2003 ZBG 4 PH 4.6 pH 8/13/2003 ZBG 4 PH 6.1 pH 4/1/2003 ZBG 5 PH 6.2 pH 8/13/2003 ZBG 5 PH 7.4 pH 7/10/2003 LFW 74D SPECIFIC CONDUCTANCE 54 uS/cm 4/2/2003 ZBG 1 SPECIFIC CONDUCTANCE 45 uS/cm 8/13/2003 ZBG 1 SPECIFIC CONDUCTANCE 14 uS/cm 3/19/2003 ZBG 1A SPECIFIC CONDUCTANCE 67 uS/cm 8/13/2003 ZBG 1A SPECIFIC CONDUCTANCE 0 uS/cm 3/19/2003 ZBG 2 SPECIFIC CONDUCTANCE 27 uS/cm 8/13/2003 ZBG 2 SPECIFIC CONDUCTANCE 14 uS/cm 3/18/2003 ZBG 3 SPECIFIC CONDUCTANCE 10 uS/cm 8/13/2003 ZBG 3 SPECIFIC CONDUCTANCE 15 uS/cm 4/1/2003 ZBG 4 SPECIFIC CONDUCTANCE 42 uS/cm 8/13/2003 ZBG 4 SPECIFIC CONDUCTANCE 29 uS/cm 4/1/2003 ZBG 5 SPECIFIC CONDUCTANCE 149 uS/cm 8/13/2003 ZBG 5 SPECIFIC CONDUCTANCE 169 uS/cm 7/10/2003 LFW 74D TURBIDITY 4.3 NTU 4/2/2003 ZBG 1 TURBIDITY 82 NTU 8/13/2003 ZBG 1 TURBIDITY 9 NTU 3/19/2003 ZBG 1A TURBIDITY 10 NTU 8/13/2003 ZBG 1A TURBIDITY 0 NTU 3/19/2003 ZBG 2 TURBIDITY 6.7 NTU 8/13/2003 ZBG 2 TURBIDITY 1.9 NTU 3/18/2003 ZBG 3 TURBIDITY 9.7 NTU 8/13/2003 ZBG 3 TURBIDITY 2.1 NTU 4/1/2003 ZBG 4 TURBIDITY 745 NTU 8/13/2003 ZBG 4 TURBIDITY 81 NTU 4/1/2003 ZBG 5 TURBIDITY 185 NTU 8/13/2003 ZBG 5 TURBIDITY 630 NTU 7/10/2003 LFW 74D VOLUME PURGED 14 gal

WSRC-MS-2004-00004 PAGE 13 of 17 13 DATE WELL ANALYTE_NAME QUANTIFIER VALUE UNITS 4/2/2003 ZBG 1 VOLUME PURGED 0 gal 8/13/2003 ZBG 1 VOLUME PURGED 7 gal 3/19/2003 ZBG 1A VOLUME PURGED 9 gal 8/13/2003 ZBG 1A VOLUME PURGED 0 gal 3/19/2003 ZBG 2 VOLUME PURGED 17 gal 8/13/2003 ZBG 2 VOLUME PURGED 13 gal 3/18/2003 ZBG 3 VOLUME PURGED 74 gal 8/13/2003 ZBG 3 VOLUME PURGED 10 gal 4/1/2003 ZBG 4 VOLUME PURGED 3 gal 8/13/2003 ZBG 4 VOLUME PURGED 5 gal 4/1/2003 ZBG 5 VOLUME PURGED 5 gal 8/13/2003 ZBG 5 VOLUME PURGED 7 gal 7/10/2003 LFW 74D WATER TEMPERATURE 23.8 degC 4/2/2003 ZBG 1 WATER TEMPERATURE 15.5 degC 8/13/2003 ZBG 1 WATER TEMPERATURE 20.8 degC 3/19/2003 ZBG 1A WATER TEMPERATURE 15 degC 8/13/2003 ZBG 1A WATER TEMPERATURE 0 degC 3/19/2003 ZBG 2 WATER TEMPERATURE 20 degC 8/13/2003 ZBG 2 WATER TEMPERATURE 5.6 degC 3/18/2003 ZBG 3 WATER TEMPERATURE 20 degC 8/13/2003 ZBG 3 WATER TEMPERATURE 21.5 degC 4/1/2003 ZBG 4 WATER TEMPERATURE 17.5 degC 8/13/2003 ZBG 4 WATER TEMPERATURE 21 degC 4/1/2003 ZBG 5 WATER TEMPERATURE 20.4 degC 8/13/2003 ZBG 5 WATER TEMPERATURE 21.5 degC 4/1/2003 ZBG 5 AIR TEMPERATURE 14 degC 4/1/2003 ZBG 4 AIR TEMPERATURE 14 degC 3/18/2003 ZBG 3 AIR TEMPERATURE 0 degC 3/19/2003 ZBG 2 AIR TEMPERATURE 18 degC 3/19/2003 ZBG 1A AIR TEMPERATURE 18 degC 4/2/2003 ZBG 1 AIR TEMPERATURE 18 degC 7/10/2003 LFW 74D AIR TEMPERATURE 33 degC 8/13/2003 ZBG 5 AIR TEMPERATURE 27.2 degC 8/13/2003 ZBG 4 AIR TEMPERATURE 26.9 degC 8/13/2003 ZBG 3 AIR TEMPERATURE 26.7 degC 8/13/2003 ZBG 2 AIR TEMPERATURE 54.9 degC 8/13/2003 ZBG 1A AIR TEMPERATURE 28 degC 8/13/2003 ZBG 1 AIR TEMPERATURE 28.6 degC

WSRC-MS-2004-00004 PAGE 14 of 17 14 Table 4. Resample data from December 2003.

WELL DATE ANALYTE QUALIFIER RESULT UNIT ZBG-4 120303 AGTOT U

0.01 MGL ZBG-4 120403 AGTOT U

0.01 MGL ZBG-4 Filered 120403 AGTOT U

0.01 MGL ZBG-5 120303 AGTOT U

0.01 MGL ZBG-5 120303 AGTOT 0.04539 MGL ZBG-5 120303 AGTOT 0.04553 MGL ZBG-5 120403 AGTOT 0.01244 MGL ZBG-5 Filtered 120403 AGTOT U

0.01 MGL ZBG-4 120303 ALTOT 5.821 MGL ZBG-4 120303 ALTOT 5.005 MGL ZBG-4 120403 ALTOT 2.658 MGL ZBG-4 Filered 120403 ALTOT U

0.3 MGL ZBG-5 120303 ALTOT 2.529 MGL ZBG-5 120303 ALTOT 4.796 MGL ZBG-5 120303 ALTOT 4.871 MGL ZBG-5 120403 ALTOT 53.61 MGL ZBG-5 Filtered 120403 ALTOT U

0.3 MGL ZBG-4 120303 ASTOT U

0.04 MGL ZBG-4 120303 ASTOT U

0.04 MGL ZBG-4 120403 ASTOT U

0.04 MGL ZBG-4 Filered 120403 ASTOT U

0.04 MGL ZBG-5 120303 ASTOT U

0.04 MGL ZBG-5 120303 ASTOT 1.913 MGL ZBG-5 120303 ASTOT 1.907 MGL ZBG-5 120403 ASTOT U

0.04 MGL ZBG-5 Filtered 120403 ASTOT U

0.04 MGL ZBG-4 120303 BATOT 0.2148 MGL ZBG-4 120303 BATOT 0.2134 MGL ZBG-4 120403 BATOT 0.09887 MGL ZBG-4 Filered 120403 BATOT J

0.005191 MGL ZBG-5 120303 BATOT 0.08047 MGL ZBG-5 120303 BATOT 2.235 MGL ZBG-5 120303 BATOT 2.24 MGL ZBG-5 120403 BATOT 1.015 MGL ZBG-5 Filtered 120403 BATOT 0.04162 MGL ZBG-4 120303 BETOT J

0.0008669 MGL ZBG-4 120303 BETOT J

0.0009336 MGL ZBG-4 120403 BETOT J

0.0004644 MGL ZBG-4 Filered 120403 BETOT J

0.000141 MGL

WSRC-MS-2004-00004 PAGE 15 of 17 15 WELL DATE ANALYTE QUALIFIER RESULT UNIT ZBG-5 120303 BETOT J

0.0009927 MGL ZBG-5 120303 BETOT 0.05158 MGL ZBG-5 120303 BETOT 0.05173 MGL ZBG-5 120403 BETOT 0.02972 MGL ZBG-5 Filtered 120403 BETOT U

0.001 MGL ZBG-4 120303 CDTOT J

0.000686 MGL ZBG-4 120303 CDTOT J

0.0007371 MGL ZBG-4 120403 CDTOT J

0.0003471 MGL ZBG-4 Filered 120403 CDTOT J

0.0001558 MGL ZBG-5 120303 CDTOT J

0.0004791 MGL ZBG-5 120303 CDTOT 0.05269 MGL ZBG-5 120303 CDTOT 0.05271 MGL ZBG-5 120403 CDTOT 0.005556 MGL ZBG-5 Filtered 120403 CDTOT U

0.001 MGL ZBG-4 120303 COTOT 0.005859 MGL ZBG-4 120303 COTOT 0.005617 MGL ZBG-4 120403 COTOT J

0.002543 MGL ZBG-4 Filered 120403 COTOT J

0.001142 MGL ZBG-5 120303 COTOT J

0.002122 MGL ZBG-5 120303 COTOT 0.5188 MGL ZBG-5 120303 COTOT 0.5193 MGL ZBG-5 120403 COTOT 0.05537 MGL ZBG-5 Filtered 120403 COTOT U

0.004 MGL ZBG-4 120303 CRTOT 0.01698 MGL ZBG-4 120303 CRTOT 0.01632 MGL ZBG-4 120403 CRTOT 0.01075 MGL ZBG-4 Filered 120403 CRTOT U

0.009 MGL ZBG-5 120303 CRTOT 0.01087 MGL ZBG-5 120303 CRTOT 0.2117 MGL ZBG-5 120303 CRTOT 0.2125 MGL ZBG-5 120403 CRTOT 0.2302 MGL ZBG-5 Filtered 120403 CRTOT J

0.002181 MGL ZBG-4 120303 CUTOT J

0.0008655 MGL ZBG-4 120303 CUTOT J

0.0006734 MGL ZBG-4 120403 CUTOT J

0.001997 MGL ZBG-4 Filered 120403 CUTOT J

0.004416 MGL ZBG-5 120303 CUTOT U

0.005 MGL ZBG-5 120303 CUTOT 0.233 MGL ZBG-5 120303 CUTOT 0.2333 MGL ZBG-5 120403 CUTOT 0.01182 MGL ZBG-5 Filtered 120403 CUTOT J

0.0009509 MGL ZBG-4 120303 FETOT 4.483 MGL ZBG-4 120303 FETOT 4.436 MGL ZBG-4 120403 FETOT 1.943 MGL ZBG-4 Filered 120403 FETOT U

0.4 MGL ZBG-5 120303 FETOT 2.054 MGL ZBG-5 120303 FETOT 3.135 MGL ZBG-5 120303 FETOT 3.147 MGL ZBG-5 120403 FETOT 50.57 MGL ZBG-5 Filtered 120403 FETOT J

0.006047 MGL ZBG-4 120303 MNTOT 0.1029 MGL ZBG-4 120303 MNTOT 0.09733 MGL

WSRC-MS-2004-00004 PAGE 16 of 17 16 WELL DATE ANALYTE QUALIFIER RESULT UNIT ZBG-4 120403 MNTOT 0.04404 MGL ZBG-4 Filered 120403 MNTOT 0.02226 MGL ZBG-5 120303 MNTOT 0.04452 MGL ZBG-5 120303 MNTOT 0.5607 MGL ZBG-5 120303 MNTOT 0.5619 MGL ZBG-5 120403 MNTOT 1.274 MGL ZBG-5 Filtered 120403 MNTOT 0.004578 MGL ZBG-4 120303 MOTOT J

0.001072 MGL ZBG-4 120303 MOTOT J

0.001175 MGL ZBG-4 120403 MOTOT J

0.001199 MGL ZBG-4 Filered 120403 MOTOT U

0.005 MGL ZBG-5 120303 MOTOT U

0.005 MGL ZBG-5 120303 MOTOT J

0.002059 MGL ZBG-5 120303 MOTOT U

0.005 MGL ZBG-5 120403 MOTOT 0.007208 MGL ZBG-5 Filtered 120403 MOTOT U

0.005 MGL ZBG-4 120303 NITOT J

0.01264 MGL ZBG-4 120303 NITOT J

0.01165 MGL ZBG-4 120403 NITOT J

0.007068 MGL ZBG-4 Filered 120403 NITOT U

0.04 MGL ZBG-5 120303 NITOT J

0.004841 MGL ZBG-5 120303 NITOT 0.5135 MGL ZBG-5 120303 NITOT 0.5144 MGL ZBG-5 120403 NITOT 0.2032 MGL ZBG-5 Filtered 120403 NITOT J

0.005274 MGL ZBG-4 120303 PBTOT J

0.007701 MGL ZBG-4 120303 PBTOT J

0.00799 MGL ZBG-4 120403 PBTOT J

0.007175 MGL ZBG-4 Filered 120403 PBTOT U

0.03 MGL ZBG-5 120303 PBTOT J

0.00324 MGL ZBG-5 120303 PBTOT 0.4942 MGL ZBG-5 120303 PBTOT 0.4968 MGL ZBG-5 120403 PBTOT J

0.02844 MGL ZBG-5 Filtered 120403 PBTOT U

0.03 MGL ZBG-4 120303 SBTOT J

0.03849 MGL ZBG-4 120303 SBTOT 0.1299 MGL ZBG-4 120403 SBTOT U

0.08 MGL ZBG-4 Filered 120403 SBTOT J

0.02392 MGL ZBG-5 120303 SBTOT 0.3072 MGL ZBG-5 120303 SBTOT 0.5156 MGL ZBG-5 120303 SBTOT 0.5073 MGL ZBG-5 120403 SBTOT 0.1571 MGL ZBG-5 Filtered 120403 SBTOT J

0.07051 MGL ZBG-4 120303 SETOT J

0.007949 MGL ZBG-4 120303 SETOT U

0.05 MGL ZBG-4 120403 SETOT U

0.05 MGL ZBG-4 Filered 120403 SETOT U

0.05 MGL ZBG-5 120303 SETOT U

0.05 MGL ZBG-5 120303 SETOT 1.932 MGL ZBG-5 120303 SETOT 1.923 MGL ZBG-5 120403 SETOT U

0.05 MGL ZBG-5 Filtered 120403 SETOT U

0.05 MGL

WSRC-MS-2004-00004 PAGE 17 of 17 17 WELL DATE ANALYTE QUALIFIER RESULT UNIT ZBG-4 120303 SRTOT 0.02377 MGL ZBG-4 120303 SRTOT 0.02026 MGL ZBG-4 120403 SRTOT J

0.009882 MGL ZBG-4 Filered 120403 SRTOT J

0.002822 MGL ZBG-5 120303 SRTOT 0.02618 MGL ZBG-5 120303 SRTOT 0.02711 MGL ZBG-5 120303 SRTOT 0.02628 MGL ZBG-5 120403 SRTOT 0.2315 MGL ZBG-5 Filtered 120403 SRTOT 0.02937 MGL ZBG-4 120303 TLTOT U

0.06 MGL ZBG-4 120303 TLTOT U

0.06 MGL ZBG-4 120403 TLTOT U

0.06 MGL ZBG-4 Filered 120403 TLTOT U

0.06 MGL ZBG-5 120303 TLTOT U

0.06 MGL ZBG-5 120303 TLTOT 1.935 MGL ZBG-5 120303 TLTOT 1.946 MGL ZBG-5 120403 TLTOT U

0.06 MGL ZBG-5 Filtered 120403 TLTOT U

0.06 MGL ZBG-4 120303 VTOT J

0.009954 MGL ZBG-4 120303 VTOT J

0.009456 MGL ZBG-4 120403 VTOT J

0.004803 MGL ZBG-4 Filered 120403 VTOT U

0.01 MGL ZBG-5 120303 VTOT J

0.007333 MGL ZBG-5 120303 VTOT 0.5022 MGL ZBG-5 120303 VTOT 0.5036 MGL ZBG-5 120403 VTOT 0.08577 MGL ZBG-5 Filtered 120403 VTOT J

0.002975 MGL ZBG-4 120303 ZNTOT J

0.01802 MGL ZBG-4 120303 ZNTOT J

0.0221 MGL ZBG-4 120403 ZNTOT J

0.0128 MGL ZBG-4 Filered 120403 ZNTOT J

0.01417 MGL ZBG-5 120303 ZNTOT J

0.02939 MGL ZBG-5 120303 ZNTOT 0.5355 MGL ZBG-5 120303 ZNTOT 0.536 MGL ZBG-5 120403 ZNTOT 0.3186 MGL ZBG-5 Filtered 120403 ZNTOT U

0.1 MGL

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