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HISTORICAL SUMMARY OF MONITORING RESULTS <br /> GROUNDWATER <br /> HARNEY LANE SANITARY LANDFILL <br /> MW-4 <br /> Units:mg/1,unless.noted <br /> Sample Designation MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW4 MW-4 MW-4 MW-4 MW-4 MW4 MW-4 MW4 MW-4 Mw_4 MW-4 <br /> Sampling Date 11/1/96 2/12/97 6/6/97 8/7/97 11/7/97 2/2/98 4/17/98 7/17/98 10/26/98 I/18/99 4/14/99 7/8/99 10/18/99 1/21/00 4/25/00 7/13/00 10/11/00 <br /> Monitorine and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(�C) 19.4 17.83 20.5 22.67 74.6 17.8 19.7 23.5 19.6 17.9 20:3 20.8 19.7 19.3 20 5 21.8 19.8 <br /> Electrical Conductivity(umbos/cm) 851 140 700 520 644 710 757 935 745 916 913 830 751 821 800 718 713 <br /> pH(units) 6.78 7.18 7.53 7.38 7.05 7.35 7.11 8.01 7.42 7.24 7.27 7.22 6.88 7,46 7.65 7.34 6.92 <br /> Turbidity(NPU) 12.2 31.1 18.4 3.05 11.78 12.42 27.6 66.5 15.1 7.76 8.4 3.73 1.91 2.48 5.77 8.61 5.43 <br /> Total Dissolved Solids 480 525 590 486 530 474 520 462 410 452 474 464 577 57 447 462 381 <br /> Chloride 120 127 120 130 127 134 133 122 150 13 141 124 123 121 126 113 133 <br /> Nitrate-Nitrogen NR NR NR 9.7 NR NR 0.1 NR NR NR NR NR 1.98 NR NR NR 22.8 <br /> Sulfate NR NR NR 11.9 NR NR 18 NR NR NR NR NR 14.7 NR NR NR 14.8 <br /> Volatile Organic Compounds(ug/) <br /> Benzene <br /> Carbon Tetrachloride <03 <0.3 <0.2 NT <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.06 <0.5 <0.95 <0.95 <0.17 <br /> Chlorobenzene <0.23 <0.23 <0.07 <0.7 <0.62 <0.62 <0.20 <br /> 1,2-Dichlorobenzene <br /> 1,4-Dichlorobenzene <0.17 <0.17 <0.11 <1 <0.99 <0.99 <0.24 <br /> Dichlorodifluoromethane trace 0.59 <0.3 NT <0.3 <0.3 <0.3 <0.31 <0.31 <0.31 <0.31 <0.31 0.133* <0.13 <0.76 <0.76 <0.76 <br /> I,2-Dichloropropane <0.3 <0.3 <0.2 NT <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.07 <0.5 <0.74 <0.74 <0.22 <br /> Methylene Chloride 0.0772* <2 <1.88 <1.88 <0.11 <br /> Tetrachloroethene <0.3 <0.3 <0.2 NT <0.24 <0.24 <0.24 <0.24 0.7 <0.24 <0.24 <0.24 0.0162* <0.5 <0.57 <0.57 <0.20 <br /> Trichloroethane <br /> Toluene <br /> Trichlorofluoromethane <0.04 <5 <0.54 <0.54 <0.15 <br /> Xylenes(Total) <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 /> (1)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 3 of 10 <br />