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Table 2.2 Detection Monitoring Results and Compliance Summary Austin Road Landfall AMW-2 AMW-6 AMW-7 AMW-12 AMW-13 AMW-14 Anal e Units Concentration Limit MDL 6/1/10t 5/28/10 5/28/10 5/29/10 5/28/10 5/28/10 Field Parameters H pH units 6.71-8.35 - 7.41 7.59 7.66 7.57 7.60 7.59 Specific Conductance µmhos/cm 1466 - 1161 458 549 660 915 905 Temperature °C 21.35 - 20.0 20.0 21.0 19.8 17.6 18.6 Turbidity NTU 97 - 1 1 2 0.75 1 11 Monitoring Parameters Arsenic mg/L 0.007265 - 0.0025 0.0042 0.0044 0.0036 0.0040 0.0027 Barium m 0.2189 - 0.15 0.15 0.19 0.17 0.27* 0.25* Bicarbonate m 494 - 420 170 210 270 390 310 Calcium mg/L 138.9 - 110 40 51 60 83 82 Carbonate m 12 - <5.0 <2.5 <2.5 <2.5 <2.5 <2.5 Chloride m 77.77 - 48 37 40 40 43 75 Chromium,Hexavalent m 0.005 - 0.0028 0.0043 0.0046 0.0015J 0.0032 0.0026 Magnesium mg/L 63.07 - 52 19 25 28 44 41 Nitrate as N mg/L 125 - 29 2.7 6.4 6.7 12 12 Oil and Grease mg/L 2.5 - <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 Potassium mg/L 10.79 - 8.9 6.7 7.9 3.7 6.8 5.6 Sodium mg/L 78.02 - 60 27 30 38 50 48 Strontium mg/L 1393 - 1 0.46 0.63 0.59 0.98 0.96 Sulfate mg/L 150.2 - 81 25 27 38 61 68 Total Dissolved Solids mg/L 1024 - 790 310 360 440 600 600 Volatile Petroleum Hydrocarbons u L 25 - <50 <50 <50 <50 <50 <50 Volatile Organic Compounds 1,1-Dichloroethane u L Detect 0.081 <0.50 <0.50 <0.50 <0.50 0.20J <0.50 1,2-Dichloro ro ane u Detect 0.12 <0.50 <0.50 <0.50 <0.50 <0.50 0.16J Dichlorodifluoromethane u L Detect 0.11 <0.50 0.29.1 <0.50 <0.50 0.34J 0.30.1 Tetrachloroethene u L Detect 0.13 <0.50 0.76* <0.50 0.251 4.6* 3.2* Trichloroethene u L Detect 0.13 <0.50 <0.50 <0.50 <0.50 1.0* 0.27J Trichlorofluoromethane u L Detect 0.11 <0.50 <0.50 <0.50 <0.50 0.22J <0.50 t Denotes the sampling date. J Denotes detections above the method detection limit but at or below the practical quantitation limit. *Denotes a downgradient value exceeding the concentration limit. i � !