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HISTORICAL SUMMARY OF MONITORING RESULTS <br /> GROUNDWATER <br /> HARNEY LANE SANITARY LANDFILL <br /> MW-2 <br /> Units:-me,unless noted <br /> Sample Designation MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW 2 <br /> Sampling Date 1/20/05 5126/05 7/25/05 10/12/05 1/18/06 4/25/06 7/14/06 10/18/06 1/10/07 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C) 18.0 19.5 21.4 19.2 15.9 18.8 21.6 20.8 18.8 <br /> Electrical Conductivity(umhos/cm) 323 290 360 348 584 316 358 636 334 <br /> pH(nests) 7.23 7.11 7.58 7.16 6.74 677 708 717 7.69 <br /> Turbidity(NM 11.70 14.70 7.40 7.4 12.6 8.7 7.3 17.8 12.8 <br /> Total Dissolved Solids 260 230 210 290 240 252 218 245 270 <br /> Chloride 25 24 24 24 24 28 22 29 24 <br /> Nitrate-Nitrogen NR NR NR 1.6 NR NR NR 16 NR <br /> Sulfate NR NR NR 3 NR NR NR 3.4 NR <br /> Volatile Organic Compounds(u¢/1) <br /> Benzene <0.16 <0.16 <0.16 <0.16 <0.I6 <0.12 <0.12 <0.42 <0.42 <br /> Carbon Tetrachloride <0.32 <0.32 <0.32 <0.32 <0.32 <0.IS <0.18 <0.48 <0.48 <br /> Chiorobenzene <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.36 <0.36 <br /> 1,2-Dichlorobenzene <0.20 <0.20 <0.20 <0.20 <0.20 <0.14 <0.14 <0.36 <036 <br /> 1,4-Dichlorobenzene <0.16 <0.16 <0.16 <0.16 <0.16 <0.11 <0.11 <037 <0.37 <br /> Dichlorodifluoromethane 3.0 1.6 1.6 1.9 2.6 1.2 1.3 1.8 3.6 <br /> I 2-Dichloeopropane 0.65 0.46* 0.44* 0.67 0.63 0.54 036 0.41* 0.5 <br /> Methylene Chloride 40.40 <0.40 <0.40 <0.40 <0.40 <0.15 <0.15 <0.43 <0.43 <br /> Tetrachloroethene 1.1 0.93 0.92 1.4 1.3 1.2 1.1 1.2 1.3 <br /> Toluene <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0,14 <0.38 <0.38 <br /> Trichloroethane 0.11 <0.38 <0.36 <0.36 <br /> Trichlorofluoromethane <0.41 <0.41 <0.41 <0.41 <0.41 <0.I4-<-0-71 4 <0.60 <0.60 <br /> Xylenes(Total) <0.36 0.36 <0.36 <0.36 <0.36 <0 14 <0 14 <1.1 <1.1 <br /> Only organic compounds detected in one or more samples are listed. <br /> [i j This analytical result appears to be anomalous and therefore was not used in the statistical evaluation procedures. <br /> {I)Parameter also detected in one or more quality control blanks(indicated for data from 1-18-99 to present) <br /> *=Trace Concentration <br /> NR=Not Requested- <br /> MW-2; <br /> equestedMW-2;Printed:3/22/2007 6 of 10 <br />