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Table 9.8 Summary of Maximum Groundwater Results from the Northwest Plume
South Field Groundwater Monitoring
Parameter MW MW MW MW MW MW MW MW MW
242 243 244 245 246 247 248 249 250
Metals Aluminum I NO NO ND N.8 ND ND - NO NO NO
(mgIL) Barium 0:268 0.1?7 0.098 0.177 ND 0.167 0.143 0.09 0.078
Calcium 31.8 31.6 21.4 22.2 40;2 23.8 28.8 21.7 21.3
Chromium 0:261 . l.l5 ND ND ND ND NO NO NO
Cobalt 0;014 ND NO ND NO ND NO ND NO
Iron 3.65 6.9 0.226 lOA 0.25 6.99 0.219 0.472 0.27
Magnesium 12.2 12.5 8.86 9.25 16:8 11.6 11.8 8.49 8.71
Manganese 0.156 ND NO 1.94 No 0.86 NO NO NO
Nickel 0.838 0,39 NO ND NO NO NO NO NO
Potassium NO ND ND ND ND 5.81 NO NO NO
Sodium 27.7 30.8 30.4 28.1 llO 37.6 27.8 34.5 32
Other Metals· ND ND ND ND ND ND ND NO NO
Rads Alpha activity NO 5.41 ND ND ND NO 6.92 NO 4.08
(pC ilL) Beta'activity 118.39 953.58 23.28 74.7 ND 14.19 1503.64 54.44 75.52
Neptunium-
237
NO NO ND ND ND NO NO NO ND
Plutonium-
NO NO ND ND ND NO NO NO ND
239/240
Radium 0.56 NO ND NO ND 0.94 0.6 NO NO
Radon 104 156 137 189 397 ll8 225 157 137
Technetium"99 130 1060 24.3 62.3 ND NO 1550 41.8 680
Thorium-230 NO NO ND No ND ND NO NO ND
VOCs TCE 180 3300 20 100 I ND 9100 190 72
(llgIL) OtherVOCs 2 ND NO ND NO ND NO NO NO ND
Others Chloride 67.8 69~9 22.3 10:5 5.9 5.5 56.5 16.4 . 20.3
(mgIL) Fluoride NO 0.1 0.14 0.19 0.27 . 0.15 0.1 0.12 0.15
Nitrate:as
Nitrogen
1.4 1.7 NO ND ND ND 4.5 NO NO
Dissolved
Solids
225 222 167 177 489 188 212 120 146
Suifate 10.9 IL2 11.3 II 206 NO 10 9.4 10.4
Alkalinity 82 72 90 90 155 175 71 69 85
Phosphate as
Phosphorous
ND ND ND ND ND NO ND ND NO
Silica 18 16 18 28 37 5 18 18 18
Total Organic
Carbon·
Total
Phosphate as
Ll
ND ND
ND
ND
ND
ND
1.7
ND
NO
ND
NO
ND
NO
ND
NO
ND
Phosphorus
Turbidity
(NTU) .
ND = not detected
35 40 3.1 220 7.4 55 4.5 10 3.4
Other metals include: Antimony, Arsenic, Beryllium, Cadmium, Copper, Lead, Mercury, Molybdenum,
Selenium, Silver, Uranium, and Zinc .
Other VOCs inClude: 1,1,1-Trichloroethane; 1,1,2-Trichloroethane; 1,I-Dichloroethane; 1,1-
Dichloroethene; 1,2-Dichloroethane; Benzene; Bromodichloromethane; Carbon tetrachloride; Chloroform;
cis-I,2-Dichloroethene; Dimethylbenzene; Ethylbenzene; Tetrachloroethene; Toluene; trans-l,2-
Dichloroethene; and Vinyl chloride
9-20 Groundwater