6.3.2.3 Results of Analysis

6.3.2.3. Results of Analyses

A description of each well, a listing of field parameters measured during sample collection, and the results of chemical and radiological analysis of samples from the wells in the 800 Area are contained in Tables 6.25 to 6.37. All radiological and inorganic analysis results are shown in these tables. The analysis methods used for organic compounds will identify and quantify all the compounds contained in the CLP Target Compound List. However, the vast majority of these compounds were not detected in the samples. Only those constituents which were present in amounts great enough to quantify are shown. The detection limits for the organic compounds listed were typically 1 to 5 ľg/L. The trend

TABLE 6.25 Groundwater Monitoring Results, Sanitary Landfill Well #800011R, 1994 m(MSL) Well Point Elevation 219.91 Ground Surface Elevation 227.69 Casing Material: PVC ___________________________________________________________________________________________ Constituent Units 01/24/94 04/04/94 07/11/94 10/04/94 ___________________________________________________________________________________________ Water Elevation m 226.26 226.95 225.83 225.30 Temperature C 11.2 9.8 11 12.6 pH pH 7.30 7.11 7.05 6.69 Redox mV -47 120 128 59 Conductivity ľmhos/cm 2310 2280 2450 2270 Cyanide (Total) mg/L < 0.002 < 0.003 < 0.002 < 0.002 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.135 0.124 0.131 0.112 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 0.04 0.08 0.27 < 0.04 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.235 0.214 0.194 0.180 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 < 0.020 0.034 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.050 Ammonia nitrogen m 0.3 0.2 0.3 0.3 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 800 756 837 687 Sulfate mg/L 121 116 134 131 Total dissolved solids mg/L 1663 1617 1845 1506 Total organic carbons mg/L 1.7 1.9 1.1 1.3 Total organic carbons mg/L 1.6 1.6 1.8 1.5 Total organic carbons mg/L 1.4 1.5 1.7 1.8 Total organic carbons mg/L 1.5 1.5 1.7 1.3 Total organic halogens mg/L 0.031 0.018 0.022 < 0.005 Total organic halogens mg/L 0.020 0.021 0.023 < 0.005 ____________________________________________________________________________________________ TABLE 6.26 Groundwater Monitoring Results, Sanitary Landfill Well #800021R, 1994 m(MSL) Well Point Elevation 214.70 Ground Surface Elevation 230.83 Casing Material: PVC __________________________________________________________________________________________________ Constituent Units 01/24/94 01/24/94 04/04/94 07/11/94 10/04/94 __________________________________________________________________________________________________ Water Elevation m 225.17 225.17 225.60 224.79 224.38 Temperature C 10.9 10.9 11.5 11.3 11.0 pH pH 7.23 7.23 7.13 7.21 6.92 Redox mV 47 47 104 23 98 Conductivity ľmhos/cm638 638 657 652 659 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.124 0.125 0.106 0.112 0.110 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 0.0002 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.010 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 0.09 0.07 < 0.04 < 0.04 < 0.04 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.356 0.354 0.296 0.266 0.245 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 0.025 0.019 < 0.050 Ammonia nitrogen mg/L 0.2 0.4 0.2 0.2 0.3 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 16 17 17 19 18 Sulfate mg/L 116 96 84 104 99 Total dissolved solids mg/L 518 526 495 493 548 Total organic carbons mg/L 1.1 2.5 1.1 1.2 1.2 Total organic carbons mg/L 1.1 1.1 1.1 1.1 1.1 Total organic carbons mg/L 1.4 1.2 1.1 1.0 1.0 Total organic carbons mg/L 1.5 1.1 < 1.0 1.2 1.1 Total organic halogens mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.005 Total organic halogens mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.005 Total organic halogens mg/L - - 2 - - _______________________________________________________________________________________________ TABLE 6.27 Groundwater Monitoring Results, Sanitary Landfill Well #800031, 1994 m(MSL) Well Point Elevation 217.51 Ground Surface Elevation 226.77 Casing Material: PVC __________________________________________________________________________________________ Constituent Units 01/24/94 04/05/94 07/14/94 10/05/94 __________________________________________________________________________________________ Water Elevation m 223.87 224.19 223.19 223.44 Temperature C 10.7 10.0 10.5 10.8 pH pH 6.97 6.91 6.92 6.74 Redox mV - 69 - 46 7 21 Conductivity ľmhos/cm1243 1244 1317 1521 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L < 0.003 0.002 < 0.006 0.002 Barium mg/L 0.233 0.246 0.285 0.234 Beryllium mg/L < 0.0001 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 7.614 2.517 8.224 0.099 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.192 0.134 0.254 0.174 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L 0.020 0.025 0.034 0.037 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.011 < 0.010 < 0.050 Ammonia nitrogen mg/L 0.4 0.9 1.0 1.0 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 18 8 25 12 Sulfate mg/L 203 223 257 244 Total dissolved solids mg/L 1156 971 1331 1212 Total organic carbons mg/L 26.9 26.6 25.8 31.9 Total organic carbons mg/L 28.2 26.7 27.8 31.7 Total organic carbons mg/L 27.8 27.4 7.7 32.0 Total organic carbons mg/L 28.0 26.7 27.5 35.2 Total organic halogens mg/L < 0.010 < 0.014 < 0.010 < 0.005 Total organic halogens mg/L < 0.010 < 0.016 < 0.010 < 0.005 ____________________________________________________________________________________________ TABLE 6.28 Groundwater Monitoring Results, Sanitary Landfill Well #800041R, 1994 m(MSL) Well Point Elevation 219.48 Ground Surface Elevation 227.23 Casing Material: PVC ____________________________________________________________________________________________________ Constituent Units 01/24/94 04/04/94 04/04/94 07/11/94 10/04/94 ____________________________________________________________________________________________________ Water Elevation m 224.61 224.85 224.85 224.59 224.49 Temperature C 10.8 9.4 9.4 10.0 11.1 pH pH 7.02 6.76 6.76 6.90 6.72 Redox mV -44 108 108 255 132 Conductivity ľmhos/cm1022 988 988 997 1063 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.210 0.199 0.193 0.209 0.204 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0002 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L < 0.04 < 0.04 < 0.04 < 0.04 < 0.04 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.015 0.013 0.027 0.033 0.010 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.021 < 0.021 < 0.020 < 0.020 0.024 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.050 Ammonia nitrogen mg/L 0.1 0.1 0.5 0.1 0.8 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 < 0.100 - < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 - < 0.25 < 0.25 Chloride mg/L 106 102 106 96 90 Sulfate mg/L 82 184 182 221 217 Total dissolved solids mg/L 815 837 839 884 898 Total organic carbons mg/L 4.4 4.2 5.3 4.9 4.8 Total organic carbons mg/L 4.4 4.5 4.5 4.5 3.8 Total organic carbons mg/L 4.4 4.4 4.5 4.5 4.0 Total organic carbons mg/L 4.5 4.2 4.5 4.8 4.1 Total organic halogens mg/L < 0.010 < 0.018 0.018 < 0.010 < 0.005 Total organic halogens mg/L < 0.010 < 0.010 0.010 < 0.010 < 0.005 _____________________________________________________________________________________________________________ TABLE 6.29 Groundwater Monitoring Results, Sanitary Landfill Well #800061, 1994 m(MSL) Well Point Elevation 206.89 Ground Surface Elevation 229.91 Casing Material: PVC _________________________________________________________________________________________________________ Constituent Units 01/24/94 04/04/94 07/11/94 10/05/94 __________________________________________________________________________________________________________ Water Elevation m 217.17 217.20 216.78 216.02 Temperature C 10.2 11.2 12.3 11.1 pH pH 6.72 6.70 6.78 6.51 Redox mV -43 -13 -14 -10 Conductivity ľmhos/cm1343 1369 1420 1426 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.161 0.150 0.175 0.168 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 6.59 0.08 1.10 0.57 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.6020 0.6250 0.5450 0.0672 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 0.026 0.028 0.034 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.015 < 0.050 Ammonia nitrogen mg/L 0.3 0.5 0.6 0.7 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L 0.541 0.570 0.585 0.623 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 225 234 231 234 Sulfate mg/L 16 21 14 14 Total dissolved solids mg/L 985 1003 1007 1064 Total organic carbons mg/L 10.6 9.9 9.1 9.1 Total organic carbons mg/L 9.4 8.2 9.4 9.0 Total organic carbons mg/L 9.3 9.0 9.2 9.2 Total organic carbons mg/L 9.3 8.9 9.4 8.8 Total organic halogens mg/L 0.130 0.250 0.166 0.056 Total organic halogens mg/L 0.142 0.250 0.104 0.059 1,2 Dichloroethane ľg/L - - - 0.6 1,4-Dioxane ľg/L 201 173 220 185 Acetone ľg/L - 5 - 5 Chlorodifluoromethane ľg/L 82 258 67 199 Ethyl Ether ľg/L 7 9 5 4 Methylene chloride ľg/L - - - 1 Tetrahydrofuran ľg/L 31 23 33 32 ________________________________________________________________________________________________

TABLE 6.30 Groundwater Monitoring Results, Sanitary Landfill Well #800071, 1994 m(MSL) Well Point Elevation 220.05 Ground Surface Elevation 227.80 Casing Material: PVC Constituent Units 01/24/94 04/04/94 07/11/94 10/04/94 Water Elevation m 221.89 222.24 221.45 221.20 Temperature C 10.7 10.0 10.7 11.2 pH pH 7.02 6.97 7.24 7.07 Redox mV -50 98 158 125 Conductivity ľmhos/cm800 810 729 771 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.097 0.080 0.071 0.096 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0010 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 0.12 < 0.04 < 0.04 0.34 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.058 0.209 0.168 0.079 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 0.020 0.028 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.022 < 0.050 Ammonia nitrogen mg/L 0.6 0.2 0.1 0.7 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L 0.491 0.300 0.207 0.715 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 40 23 25 46 Sulfate mg/L 160 177 161 178 Total dissolved solids mg/L 746 667 550 716 Total organic carbons mg/L 2.2 2.1 2.0 3.7 Total organic carbons mg/L 2.2 1.8 2.1 4.3 Total organic carbons mg/L 2.2 2.0 2.0 5.3 Total organic carbons mg/L 2.4 2.2 1.9 3.9 Total organic halogens mg/L 0.014 < 0.010 0.019 0.007 Total organic halogens mg/L < 0.010 < 0.010 0.025 0.008 1,2 Dichloroethane ľg/L - - - 0.5 Acetone ľg/L - - - 4 Methylene Chloride ľg/L - - - 2 Tetrahydrofuran ľg/L - - - 27 ___________________________________________________________________________________________________ TABLE 6.31

TABLE 6.31 Groundwater Monitoring Results, Sanitary Landfill Well #800081, 1994 m(MSL) Well Point Elevation 218.71 Ground Surface Elevation 231.53 Casing Material: PVC Constituent Units 01/24/94 04/04/94 07/11/94 10/05/94 Water Elevation m 227.49 231.53 226.40 225.88 Temperature C 10.6 9.6 10.6 10.9 pH pH 6.99 6.92 6.95 6.96 Redox mV -43 114 207 147 Conductivity ľmhos/cm1190 1180 1196 1083 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.052 0.052 < 0.050 < 0.050 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 0.0010 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L < 0.04 < 0.04 < 0.04 < 0.04 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.758 0.815 0.549 0.397 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L 0.026 0.028 0.025 0.026 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 0.025 < 0.050 Ammonia nitrogen mg/L 0.4 0.2 0.1 0.2 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 0.137 < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 < 0.250 < 0.25 Chloride mg/L 101 101 89 70 Sulfate mg/L 314 286 285 288 Total dissolved solids mg/L 1074 1105 1088 966 Total organic carbons mg/L 2.8 2.5 2.9 2.2 Total organic carbons mg/L 2.7 2.8 3.1 2.2 Total organic carbons mg/L 2.7 2.8 2.8 2.2 Total organic carbons mg/L 3.0 2.6 3.0 2.1 Total organic halogens mg/L 0.036 0.025 0.013 0.009 Total organic halogens mg/L 0.032 0.023 0.013 0.006 Acetone ľg/L - 2 - - Chlorodifluoromethane ľg/L 5 9 - - _______________________________________________________________________________________________

TABLE 6.32 TABLE 6.32 Groundwater Monitoring Results, Sanitary Landfill Well #800091, 1994 m(MSL) Well Point Elevation 223.79 Ground Surface Elevation 230.00 Casing Material: PVC ____________________________________________________________________________________________________________ Constituent Units 01/28/94 04/08/94 07/14/94 07/14/94 10/10/94 ____________________________________________________________________________________________________________ Water Elevation m 227.30 227.44 226.51 226.51 226.14 Temperature C 10.8 9.7 10.7 10.7 11.3 pH pH 6.85 6.88 6.90 6.90 6.75 Redox mV -18 -5 -41 -41 79 Conductivity ľmhos/cm1133 1054 1214 1214 1295 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L 0.005 0.004 0.006 0.005 0.007 Barium mg/L 0.259 0.235 0.282 0.277 0.253 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 4.00 4.78 4.78 7.63 18.11 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.589 0.554 0.832 0.832 1.397 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L 0.020 < 0.020 0.020 0.021 0.040 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.010 < 0.050 Ammonia nitrogen mg/L 0.2 0.3 1.0 0.4 0.5 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L 0.370 1.859 0.497 0.446 0.511 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 99 76 111 116 126 Sulfate mg/L 8 35 41 26 34 Total dissolved solids mg/L 852 854 927 961 1049 Total organic carbons mg/L 10.2 11.2 14.6 13.8 23.8 Total organic carbons mg/L 11.5 11.2 13.8 13.6 26.3 Total organic carbons mg/L 11.2 11.1 13.4 15.0 13.5 Total organic carbons mg/L 11.5 13.1 14.6 15.0 20.3 Total organic halogens mg/L 0.070 0.223 0.059 0.057 0.052 Total organic halogens mg/L 0.071 0.112 0.070 0.076 0.049 1,4-Dioxane ľg/L 158 141 141 61 188 Acetone ľg/L - - - - 4 Chlorodifluoromethane ľg/L 67 118 52 50 188 Ethyl Ether ľg/L 6 7 4 4 5 Methylene Chloride ľg/L - 1 - - 3 Nonanal ľg/L - - 34 - - Octanal ľg/L - - 26 - - Tetrahydrofuran ľg/L - - - - 1 __________________________________________________________________________________________________________ TABLE 6.33 Groundwater Monitoring Results, Sanitary Landfill Well #800101, 1994 m(MSL) Well Point Elevation 222.28 Ground Surface Elevation 229.15 Casing Material: PVC ____________________________________________________________________________________________ Constituent Units 01/28/94 04/05/94 07/14/94 10/10/94 ____________________________________________________________________________________________ Water Elevation m 227.80 228.31 227.05 226.39 Temperature C 10.10 8.50 11.40 13.00 pH pH 7.01 7.36 7.24 6.98 Redox mV 64 25 219 24 Conductivity ľmhos/cm675 648 681 725 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L 0.0037 0.0020 0.0038 0.0043 Barium mg/L 0.059 0.055 0.061 0.056 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 1.32 0.99 < 0.04 0.88 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.106 0.136 0.136 0.151 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 < 0.020 < 0.024 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.050 Ammonia nitrogen mg/L 0.6 0.2 0.2 0.6 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 5 5 6 8 Sulfate mg/L 210 175 221 162 Total dissolved solids mg/L 551 592 568 597 Total organic carbons mg/L 1.5 1.2 1.8 1.3 Total organic carbons mg/L 1.3 1.4 1.6 2.1 Total organic carbons mg/L 1.3 1.3 2.1 1.2 Total organic carbons mg/L 1.4 1.4 1.7 1.2 Total organic halogens mg/L < 0.010 < 0.010 < 0.010 < 0.005 Total organic halogens mg/L < 0.010 < 0.010 < 0.010 < 5.000 Acetone ľg/L - - - 4 Methylene Chloride ľg/L - - - 3 _________________________________________________________________________________________________ TABLE 6.34 Groundwater Monitoring Results, Sanitary Landfill Well #800121, 1994 m(MSL) Well Point Elevation 219.17 Ground Surface Elevation 229.91 Casing Material: S. Steel _____________________________________________________________________________________________ Constituent Units 01/24/94 04/05/94 07/20/94 10/05/94 ____________________________________________________________________________________________ Water Elevation m 221.72 222.09 221.08 220.62 Temperature C 10.8 10.5 11.1 10.8 pH pH 7.39 7.49 7.26 6.95 Redox mV -43 43 -165 -12 Conductivity ľmhos/cm902 720 915 1021 Arsenic mg/L 0.006 0.006 0.004 0.004 Barium mg/L 0.059 < 0.050 < 0.050 < 0.050 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 0.019 < 0.010 < 0.065 Iron mg/L < 0.04 < 0.04 < 0.04 < 0.04 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L < 0.010 0.019 < 0.010 0.056 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L 0.022 0.022 0.020 0.032 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 0.019 < 0.050 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 Chloride mg/L 27 34 34 33 Sulfate mg/L 137 223 246 246 Total dissolved solids mg/L 862 677 827 940 Acetone ľg/L 13 - - - Methylene Chloride ľg/L - 2 - 3 __________________________________________________________________________________________ TABLE 6.35 Groundwater Monitoring Results, Sanitary Landfill Well #800131, 1994 m(MSL) Well Point Elevation 205.66 Ground Surface Elevation 230.00 Casing Material: S. Steel _______________________________________________________________________________________________________ Constituent Units 01/28/94 04/08/94 07/14/94 10/12/94 10/12/94 _______________________________________________________________________________________________________ Water Elevation m 216.77 217.08 214.79 216.90 216.90 Temperature C 10.9 10.9 11.3 11.0 11.0 pH pH 7.05 6.98 6.94 6.82 6.82 Redox mV -83 -30 -58 -78 -78 Conductivity ľmhos/cm704 774 702 719 719 Cyanide (Total) mg/L < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 Arsenic mg/L 0.0038 0.0031 0.0033 0.0043 0.0045 Barium mg/L < 0.150 0.149 0.146 0.150 0.147 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 < 0.065 Iron mg/L 4.23 3.95 3.90 3.56 3.48 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.092 0.189 0.095 0.081 0.079 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 < 0.020 < 0.020 0.022 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.020 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.050 < 0.050 Ammonia nitrogen mg/L 0.4 0.2 0.7 1.5 1.5 Phenols mg/L < 0.02 < 0.02 < 0.02 < 0.02 < 0.02 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 Strontium-90 pCi/L < 0.25 < 0.25 < 0.25 < 0.25 < 0.25 Chloride mg/L 30 41 35 35 32 Sulfate mg/L 94 95 98 89 93 Total dissolved solids mg/L 524 579 553 557 542 Total organic carbons mg/L 4.8 6.1 5.0 6.3 4.4 Total organic carbons mg/L 4.8 6.1 4.8 4.4 4.6 Total organic carbons mg/L 4.9 6.3 4.6 5.2 4.3 Total organic carbons mg/L 4.9 6.2 4.7 4.3 4.2 Total organic halogens mg/L < 0.010 0.250 0.027 < 0.005 0.0054 Total organic halogens mg/L < 0.010 0.290 0.011 < 0.005 0.0052 Chlorodifluoromethane ľg/L - 10 - - - Methylene chloride ľg/L - - - 2 - ________________________________________________________________________________________________________________ TABLE 6.36 Groundwater Monitoring Results, Sanitary Landfill Well #800141D, 1994 m(MSL) Well Point Elevation 183.13 Ground Surface Elevation 229.53 Casing Material: Steel ___________________________________________________________________________________________________ Constituent Units 02/07/94 04/08/94 07/20/94 10/14/94 ____________________________________________________________________________________________________ Water Elevation m 192.91 193.06 192.98 192.94 Temperature C 11.3 11.4 11.6 11.4 pH pH 7.25 7.15 7.16 6.89 Redox mV -89 -52 -257 -307 Conductivity ľmhos/cm926 928 974 1012 Arsenic mg/L < 0.002 < 0.002 < 0.002 < 0.002 Barium mg/L 0.058 0.063 0.066 0.062 Beryllium mg/L < 0.0001 < 0.0020 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.065 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.010 Iron mg/L 1.19 1.29 1.24 1.40 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.018 0.019 0.016 0.022 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 0.021 0.032 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.050 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 Chloride mg/L 139 135 140 126 Sulfate mg/L 129 173 225 204 Total dissolved solids mg/L 746 745 768 772 Methylene Chloride ľg/L - 1 - - ______________________________________________________________________________________________ TABLE 6.37 Groundwater Monitoring Results, Sanitary Landfill Well #800151D, 1994 m(MSL) Well Point Elevation 182.31 Ground Surface Elevation 227.81 Casing Material: Steel ______________________________________________________________________________________________ Constituent Units 02/04/94 04/04/94 07/18/94 10/14/94 ______________________________________________________________________________________________ Water Elevation m 191.90 192.19 191.88 191.84 Temperature C 11.3 11.3 11.4 11.4 pH pH 7.28 7.23 7.12 7.0 Redox mV -111 -74 -61 -256 Conductivity ľmhos/cm899 902 896 931 Arsenic mg/L 0.003 0.003 0.002 0.003 Barium mg/L < 0.050 < 0.050 < 0.050 < 0.050 Beryllium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Cadmium mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Chromium mg/L < 0.020 < 0.020 < 0.020 < 0.020 Cobalt mg/L < 0.020 < 0.020 < 0.020 < 0.100 Copper mg/L < 0.010 < 0.010 < 0.010 < 0.065 Iron mg/L 0.924 1.109 1.108 1.108 Lead mg/L < 0.0010 < 0.0010 < 0.0010 < 0.0010 Manganese mg/L 0.016 0.017 0.013 0.020 Mercury mg/L < 0.0001 < 0.0001 < 0.0001 < 0.0001 Nickel mg/L < 0.020 < 0.020 < 0.020 < 0.020 Silver mg/L < 0.001 < 0.001 < 0.001 < 0.001 Thallium mg/L < 0.0030 < 0.0030 < 0.0030 < 0.0030 Vanadium mg/L < 0.200 < 0.200 < 0.200 < 0.200 Zinc mg/L < 0.010 < 0.010 < 0.010 < 0.050 Hydrogen-3 nCi/L < 0.100 < 0.100 < 0.100 < 0.100 Chloride mg/L 126 117 112 119 Sulfate mg/L 192 168 242 222 Total dissolved solids mg/L 690 719 706 684 Acetone ľg/L - - - 3 Methylene chloride ľg/L - 2 ______________________________________________________________________________________________

for exceedances of the WQS for wells monitored as part of the IEPA-approved groundwater monitoring program for the sanitary landfill are presented in Figures 6.7 to 6.21. (Figure 6.7, Figure 6.8, Figure 6.9, Figure 6.10, Figure 6.11, Figure 6.12, Figure 6.13, Figure 6.14, Figure 6.15, Figure 6.16, Figure 6.17, Figure 6.18, Figure 6.19, Figure 6.20, Figure 6.21)

Inorganic Constituents

On April 24, 1992, and January 11, 1995, the IEPA issued supplemental permits to ANL which in part approved a groundwater monitoring program for the sanitary landfill. The program is to be capable of identifying any releases from the facility and demonstrate compliance with the applicable groundwater quality standards. Under the April 1992 supplemental permit, IEPA chose 11 groundwater monitoring points (800011R, 800021R, 800031, 800041R, 800051, 800061, 800071, 800081, 800091, 800101, 800131) to be sampled on a quarterly basis commencing July 1992. Parameters to be monitored include field parameters, routine indicator parameters, and volatile organic parameters. Volatile organic parameters are to be monitored only during the second quarter of monitoring.

The Illinois Groundwater Quality Standards for Class I: Potable Resource Groundwater, 35 IAC Section 620.410, were used as the standard for evaluation of the inorganic results. Inorganic results are fairly consistent with results reported in previous years. The most common constituents at levels above the WQS (see Table 6.21) are chloride, iron, total dissolved solids (TDS), and manganese. Wells 800031, 800061, and 800091 exceeded the WQS for iron. Iron levels in these wells ranged from 6.6 to 18.1 mg/L. The TDS levels were exceeded in wells 80001 1R and 800031 and ranged from 1212 to 1845 mg/L. The manganese WQS was exceeded in wells 800011R, 800021R, 800031, 800061, 800071, 800081, 800091, and 800131. Manganese levels in these wells ranged from 0. 17 to 1.4 mg/L. The WQS for chloride was consistently exceeded in wells 80001 1R and 800061 where the levels vary from 225 to 800 mg/L. The inorganic results for dolomite wells 80014 1D and 80015 1D were within normal ranges.

No exceedances of the organic WQS were noted during 1994. Contrary to 1993, trace levels of methylene chloride were identified in more wells but usually for just one quarter. These inconsistent results may be indicative of laboratory contamination. During one quarter, trace levels of methylene chloride were identified in wells 800021R, 800061, 800071, 800101, 800131, and 800141D. During two quarters, trace levels of methylene chloride were identified in wells 800091, 800121, and 8 00151D.

As noted in 1993, ethyl ether was found in trace amounts in wells 800061 and 800091; chlorodifluoromethane was identified in wells 800061, 800081, 800091, and 800131; and 1-4-dioxane and tetrahydrofuran were identified in well 800061. Tetrahydrofuran was also detected but only during' one quarter in wells 800071 and 80009 1. Trace levels of 1,2-dichloroethane were found in only one quarter in wells 800061 and 800071.

Radioactive Constituents

Samples collected from the 800 Area sanitary landfill monitoring wells were also analyzed for hydrogen-3 and strontium-90. The results are shown in Tables 6.25 to 6.37. Although the disposal of radioactive materials was prohibited in the sanitary landfill, very low concentrations of hydrogen-3 were detected in wells 800061, 800071, 800081 and 800091, probably due to inadvertent disposal of radioactivity in the ANL trash. However, the presence of hydrogen-3 as tritiated water allows information to be obtained on the subsurface water flow pathway in the sanitary landfill area. The data indicate that the principal direction of subsurface water flow is to the south-southeast, with a small component to the northwest. This is consistent with the estimated subsurface water flow based on water level measurements and general flow patterns in the area. No strontium-90 was detected.