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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 Anal e Units Concentration Limit MDL 5/8/071 5/9/07 5/9/07 5/9/07 5/8/07 5/8/07 Field Parameters H H units 6.515-8.362 - 7.09 7.42 7.86 7.39 7.13 7.06 Specific Conductance os/cm 1500 - 910 400 440 586 766 715 Temperature °C 21.54 - 20.0 19.0 19.2 18.4 19.2 18.8 Turbidity NTU 97 - 6 <1 <1 <1 <1 3 Monitoring Parameters Arsenic m L 0.007567 - 0.0012 0.0040 0.0031 0.0032 0.0014 0.0022 Barium m L 0.2462 - 0.150 0.14 0.18 0.17 0.25* 0.22 Bicarbonate m 510.6 - 340 170 200 290 380 290 Calcium m L 149.4 - 77 36 42 57 76 70 Carbonate m L 12 - 12 <3.0 <3.0 5.7 <3.0 6.8 Chloride m L 96 - 38 39 42 34 46 54 Chromium,Hexavalent m L 0.005059 - 1 0.0034 0.0046 0.0051* 0.0014J 0.0037 0.0025 Magnesium mrZL 68.96 - 38 17 20 26 40 35 Nitrate as N m L 76.8 - 21 2.7 6.0 7.1 12 9.9 Oil and Grease m L 5 - <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 Potassium m L 11.08 - 7.6 5.8 7.4 3.4 5.9 5.0 Sodium m L 1 79.9 - 51 23 26 41 43 42 Strontium m L 1.38 - 1 0.39 0.56 0.62 0.85 0.8 Sulfate m L 151.8 - 72 26 26 46 59 57 Total Dissolved Solids m L 1022 - 650 320 360 400 620 580 Volatile Petroleum Hydrocarbons u L 25 - <50 <50 <50 <501 <50 13J Volatile Organic Compounds 1,1-Dichloroethane u L Detect 0.11 <0.50 <0.50 <0.50 <0.50 <0.50 0.12J 1,2-Dichloro ro ane u L Detect 0.12 <0.50 <0.50 <0.50 <0.50 <0.50 0.44J Dichlorodifluoromethane UEL Detect 0.085 <0.50 <0.50 <0.50 <0.50 0.191 0.66* Tetrachloroethene u L Detect 0.11 <0.50 0.47J <0.50 0.22J 2.0* 9.6* Trichloroethene u L Detect 0.13 <0.50 <0.50 <0.50 <0.50 0.39J 1.1* JDenotes detections above the method detection limit but below the reporting limit. *Denotes a downgradient value exceeding the concentration limit. f Denotes the sampling date.