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Table 2.1 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 2/22/12+ 2/24/12 2/24/12 2/22/12 2/22/12 2/22/12 Field Parameters H pH units 6.71-8.35 - 7.43 7.85 7.85 7.38 7.36 7.32 Specific Conductance µmhos/cm 1420 - 1183 468 540 740 937 995 Temperature °C 21.2 - 18.5 20.6 20.9 17.7 19.1 18.3 Turbidity NTU 502.1 - 5 19 2 7 3 14 Monitoring Parameters Arsenic mg/L 0.006623 - 0.0050 0.0047 0.0044 0.0064 0.0058 0.0055 Barium mg/L 0.2229 - 0.15 0.14 0.17 0.18 0.27* 0.26* Bicarbonate mg/L 519.5 - 390 160 200 290 420 330 Calcium mg/L 145.3 - 99 36 43 60 83 85 Carbonate mg/L 25 - <5.0 <2.5 <2.5 <2.5 <2.5 <2.5 Chloride mg/L 74.5 - 57 41 42 60 38 86* Chromium,Hexavalent mg/L 0.00496 - 0.0027 0.0052* 0.0057* 0.00181 0.0033 0.0022 Magnesium mg/L 67.69 - 48 18 20 29 44 43 Nitrate as N mg/L 125 - 32 3.5 6.2 6.4 10 13 Oil and Grease mg/L 2.9 - <5.0 <5.6 <5.9 <5.0 <5.0 <5.0 Potassium mg/L 10.72 - 8.9 5.6 7.1 4.3 6.6 5.5 Sodium mg/L 82.82 - 64 21 24 40 45 46 Strontium mg/L 1399 - 1.1 0.37 0.51 0.67 0.95 0.96 Sulfate mg/L 148.4 - 88 27 28 36 60 75 Total Dissolved Solids mg/L 986.1 - 810 330 380 480 630 660 Volatile Petroleum Hydrocarbons u L 25 - <50 <50 <50 <50 15J <50 Volatile Organic Compounds 1,1-Dichloroethane u /L Detect 0.11 <0.50 <0.50 <0.50 <0.50 0.33J <0.50 cis-1,2-Dichloroethene u L Detect 0.085 <0.50 <0.50 <0.50 <0.50 0.29J <0.50 Dichlorodifluoromethane u Detect 0.099 <0.50 0.16J <0.50 <0.50 0.63* 0.101 Tetrachloroethene u L Detect 0.13 <0.50 0.46J <0.50 <0.50 9.6* 1.4* Trichloroethene u L Detect 0.085 <0.50 <0.50 <0.50 <0.50 2.7* 0.22J Trichlorofluoromethane ug/L Detect 0.13 <0.50 <0.50 <0.50 <0.50 0.53* <0.50 t Denotes the sampling date. J Denotes detections above the method detection limit but at or below the laboratory reporting limit. *Denotes a downgradient value exceeding the concentration limit. 0