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Table 2.2 Detection Monitoring Results and Compliance Summary Austin Road Landfill AMW-2 AMW-6 I AMW-7 AMW42 AMW-13 AMW-14 Analyte Units Concentration Limit MDL 5/3/12' 5/4/12 5/3/12 5/3/12 5/4/12 5/4/12 Field Parameters H H units 6.71-8.35 - 7.28 7.83 7.76 7.52 7.49 7.33 Specific Conductance mhos/cm 1420 - 1144 466 546 783 930 1015 Tem erature °C 21.18 - 17.2 23.5* 19.9 18.1 18.9 18.8 TurbidityNTU 514.2 - 13 31 3 7 2 58 Monitoring Parameters Arsenic m L 0.006594 - 0.0042 0.0050 0.0054 0.0049 0.0039 0.0039 Barium m L 0.225 - 0.17 0.15 0.17 0.2 0.28* 0.28* Bicarbonate m L 519.8 - 420 170 210 290 420 330 Calcium m L 144.5 - 100 39 47 69 86 91 Carbonate m L 25 - <5.0 <2.5 <2.5 <2.5 <2.5 <2.5 Chloride m L 74.36 - 51 41 41 70 41 95* Chromium,Hexavalent m L 0.004932 - 0.0024 0.0049 0.0043 0.0017J 0.0035 0.0035 Magnesium m L 67.37 - 49 18 22 33 46 45 Nitrate as N m L 125 - 28 3.4 5.5 7.1 11 14 Oil and Grease m L 3 - <6.0 <5.6 <6.3 <5.0 <5.6 <5.0 Potassium m L 10.7 - 9.1 6.5 7.9 4.6 6.6 5.7 Sodium m L 82.68 - 69 25 26 45 49 49 Strontium m L 1.395 - 1.1 0.42 0.57 0.75 0.98 1 Sulfate m L 148.1 - 90 24 25 40 61 72 Total Dissolved Solids m L 985.3 - 760 340 360 510 610 640 Volatile Petroleum Hydrocarbons u L 25 - <50 <50 <50 <50 18J <50 Volatile Organic Compounds 1,1-Dichloroethane u L Detect 0.11 <0.50 <0.50 <0.50 <0.50 0.321 <0.50 cis-1,2-Dichloroethene u L Detect 0.085 <0.50 <0.50 <0.50 <0.50 0.20J <0.50 Dichlorodifluoromethane u L Detect 0.099 <0.50 0.107 <0.50 <0.50 0.51* <0.50 Tetrachloroethene u L Detect 0.13 <0.50 0.38J <0.50 <0.50 8.5* 1.2* Trichloroethene u L Detect 0.085 <0.50 <0.50 <0.50 <0.50 2.2* 0.12J Trichlorofluoromethane u L Detect 0.13 <0.50 <0.50 <0.50 <0.50 0.40J <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.