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HISTORICAL SUMMARY OF MONITORING RESULTS <br /> GROUNDWATER <br /> HARNEY LANE SANITARY LANDFILL <br /> MW-4 <br /> Units:mg/l,unless noted <br /> Sample Designation MW-4 MW-4 MW-4 MW-4 MW 4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 <br /> Sampling Date 5/26/05 7/25/05 10/12/05 1/18/06 4/25/06 7/14/06 10/18/06 1/10/07 <br /> Monitorine and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C) 19.0 19.1 18.8 14 18.9 21.3 20.5 18.8 <br /> Electrical Conductivity(umhos/cm) 627 634 673 636 674 644 1091 633 <br /> pH(anis) - 7.33 7 39 6.64 6.84 7 42 7 35 7.39 7.74 <br /> Turbidity(NTU) 13.6 8.6 13.9 8.6 9.6 12.3 16.2 10.3 <br /> Total Dissolved Solids 530 490 510 450 352 382 392 480 <br /> Chloride 140 140 130 130 145 130 120 120 <br /> Nitrate-Nitrogen NR NR 2.2 NR NR NR-2NR <br /> Sulfate NR NR 14 NR NR NR 14 NR <br /> Volatile Organic Compounds lug l) <br /> Benzene <0.16 <0.16 <0.16 <0.16 <0.12 <0.12 <0.42 <0.42 <br /> Carbon Tetrachloride <0.32 <0.32 <0.32 <0.32 <0. 88 <0.18 <0.48 <0.48 <br /> Chlorobenzene <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 <0.14 <0.14 <0.36 <0.36 <br /> 1,4-Dichlorobenzene <0.16 <0.16 <0.16 <0.16 <0.II <0.11 <0.37 <0.37 <br /> Dichlorodifluoromethane <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.48 <0.48 <br /> 1,2-Dichloropropane <0.14 <0,14 <0.14 <0.14 <0 17 <0-17 <0.40 <0.40 <br /> Methylene Chloride <0.40 <0.40 <0.40 <0.40 <0.15 <0 15 <0.43 <0.43 <br /> Tetrachloroethene <0.23 <0.23 <0.23 <0.23 <0.22 <0.22 <0.38 <0.38 <br /> Trichloroethane <0.10 <0.10 <0.38 <0.38 <br /> Toluene <0.14 <0.14 <0.14 <0.14 <0.14 <0.-14 <O 36 <0.36 <br /> Trichlorofluoromethane <0.41 <0.41 <0.41 <0.41 <0.14 <0.14 <0.60 <0.60 <br /> Xylenes(Total) <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]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-4;Printed:3/22/2007 <br /> 5of10 <br />