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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 2/19/08t 2/6/08 2/5/08 2/5/08 2/5/08 2/5/08 Field Parameters H pH units 6.599-8.331 - 7.22 7.12 7.38 7.13 6.88 6.82 Specific Conductance mhos/cm 1432 - 760 443 511 802 1120 752 Temperature °C 21.43 - 17.0 18.1 19.1 17.5 17.8 17.6 Turbidity NTU 97 - <1 <1 <1 <1 <1 <1 Monitoring Parameters Arsenic m L 0.007348 - 0.0051 0.0048 0.0040 0.0045 0.0035 0.0034 Barium ME& 0.2466 - 0.086 0.14 0.22 0.24 0.34* 0.25* Bicarbonate m 508.6 - 310 170 200 370 520* 340 Calcium m 130 - 58 37 46 78 98 71 Carbonate m 12 - <3.0 <1.5 6.3 <3.0 <3.0 <3.0 Chloride m 78.73 - 35 37 44 39 49 52 Chromium,Hexavalent m 0.005299 - 0.0026 0.0054* 0.0054* 0.0025 0.0033 0.0024 Magnesium m L 66.69 - 28 18 22 37 52 35 Nitrate as N m L 76.8 - 16 2.6 6.4 13 11 9.5 Oil and Grease m L 5 - <5.0 <5.0 <5.0 <5.0 1.4J <5.0 Potassium m 10.86 - 6.5 6.4 8.2 4.3 7.1 5.4 Sodium m L 79.44 - 46 23 28 49 52 44 Strontium mL 1.404 - 0.59 0.42 0.65 0.86 1.1 0.81 Sulfate m L 151.5 - 58 26 27 55 73 53 Total Dissolved Solids m L 991.6 - 540 320 390 570 680 550 Volatile Petroleum Hydrocarbons u L 25 - <50 <50 <50 <50 16J 12J Volatile Organic Compounds 1,1-Dichloroethane u L Detect 0.24 <0.50 <0.50 <0.50 <0.50 0.51* <0.50 cis-1,2-Dichloroethene u Detect 0.32 <0.50 <0.50 <0.50 <0.50 1.5* <0.50 Dichlorodifluoromethane u L Detect 0.34 <0.50 <0.50 <0.50 <0.50 1.7* 1.0* Ethanol u L Detect 57 <250 <250 63J 65J <250 <250 Tetrachloroethene u L Detect 0.28 <0.50 0.35J <0.50 <0.50 25* 18* Trichloroethene UfZL Detect 0.19 <0.50 <0.50 <0.50 <0.50 7.1* 1.3* Trichlorofluoromethane u L Detect 0.28 1 <0.50 1 .50 <0.50 <0.50 0.79 <0.50 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. 0 0 0