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Table 2.2 Detection Monitoring Results and Compliance Summary Austin Road Landfill AMW-2 AMW-6 AMW-7 AMW-12 AMW-13 AMW-14 Analyte Units Concentration Limit MDL 8/10/091 8/12/09 8/11/09 8/11/09 8/11/09 8/10/09 Field Parameters H pH units 6.565-8.232 - 7.24 7.17 7.37 7.06 7.17 7.31 Specific Conductance µmhos/cm 1485 - 1150 440 494 661 836 665 Temperature °C 21.24 - 19.1 19.0 21.4* 18.6 19.1 19.3 Turbidity NTU 97 - 1 <1 <1 <1 <1 1 Monitoring Parameters Arsenic mg/L 0.006877 - 0.0037 0.0046 0.0036 0.0035 0.0036 0.0030 Barium mg/L 0.235 - 0.15 0.15 0.19 0.17 0.26* 0.24* Bicarbonate mg/L 519.1 - 460 170 200 290 380 310 Calcium mg/L 130 - 130 40 44 61 81 77 Carbonate mg/L 12 - <5.0 <2.5 <2.5 <2.5 <2.5 <2.5 Chloride mg/L 81.12 - 53 39 42 43 51 70 Chromium,Hexavalent mg/L 0.005 - 0.0037 0.0054* 0.0063* 0.0031 0.0037 0.0032 Magnesium mg/L 61 - 60 19 21 29 43 39 Nitrate as N mg/L 76.8 - 38 2.6 6.3 7.0 13 12 Oil and Grease mg/L 5 - <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 Potassium mg/L 11.17 - 11 6.1 8.4 3.6 6.4 5.8 Sodium mg/L 76 - 76 23 28 42 46 47 Strontium mg/L 1.4 - 1.4 0.41 0.6 0.66 0.91 0.93 Sulfate mg/L 158 - 120 25 27 41 61 58 Total Dissolved Solids mg/L 1190 - 810 320 310 370 550 600 Volatile Petroleum Hydrocarbons ug/L 25 - <50 <50 <50 <50 <50 17J Volatile Organic Compounds Dichlorodifluoromethane u L Detect 0.21 <0.50 0.36J <0.50 <0.50 <0.50 0.61 Tetrachloroethene u L Detect 0.28 <0.50 0.94* <0.50 <0.50 2.4* 7.5* Trichloroethene u L Detect 0.13 <0.50 <0.50 <0.50 <0.50 0.64* 0.66* f Denotes the sampling date. JDenotes detections above the method detection limit but at or below the reporting limit. *Denotes a downgradient value exceeding the concentration limit.