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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 MW4 MW-4 MW4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW4 MW-4 MW4 MW-4 MW-4 MW-4 MW-4 MW-4 <br /> Sampling Date 2/1/01 4/17/01 7/30/01 I0/I1/01 1/22/02 4/18/02 7/17/02 10/2/02 1/13/03 4/28/03 7/1/03 11/11/03 1/15/04 4/21/04 7/26/04 10/20/04 1/20/05 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(C) 21.3 18.9 20.2 19 17.3 18.5 20.7 20.6 16.5 17.2 17.7 16.7 16.4 18.6 20.2 17.3 15.7 <br /> Electrical Conductivity(umbos/cm) 709 630 320 600 490 250 300 350 638 649 397 680 669 669 655 631 654 <br /> pH(units) 7.69 7.18 7.6 6.4 6.78 6.61 7.21 6.75 7.02 7.11 6.97 7.91 7.94 7.17 7.37 6.98 6.88 <br /> Turbidity(NTU) 6.25 9.7 12.4 7.9 6.2 3.7 3.1 7.3 16.1 10.9 3.42 10.6 3.50 4.39 9.78 7.97 14.6 <br /> Total Dissolved Solids 358 465 500 470 420 420 460 520 430 420 420 420 430 420 430 430 460 <br /> Chloride 122 4.8 130 1150 160 150 140 150 150 150 150 140 150 160 150 140 120 <br /> Nitrate-Nitrogen NR NR NR 2 NR NR NR 2.2 NR NR NR 2.2 NR NR 2.2 18 2.0 <br /> Sulfate NR NR NR 16 NR NR NR 16 NR NR NIR 14 NR NR 16 15 14 <br /> Volatile Oreanic Compounds(u ) <br /> Benzene <br /> <0.50 <0.16 <br /> Carbon Tetrachloride <0.95 <0.95 <0.95 <0.17 <0.95 <0.17 <0,17 <0.37 <0.37 <0.31 <0.37 <0.37 <0.37 <0.069 <0.37 <0.50 <0.32 <br /> Chlorobenzene <0.62 <0.62 <0.62 <0.20 <0.62 <0.20 <0.20 <0.32 <0.32 <0.26 <0.32 <0.32 <0.32 <0.065 <0.32 <0.50 <0.15 <br /> 1,2-Dichlorobenzene <0.22 <1.2 <0.24 <1.2 <0.24 <0.24 <0.31 <0.31 <0.32 <0.31 <0.31 <0.31 <0.076 <0.31 <0.50 <0.20 <br /> 1,4-Dichlorobenzene <l.l <l.l <l.l <0.24 <1.1 <0.24 <0.24 <0.46 <0.46 <0.27 <0.46 <0.46 <0.46 <0.098 <0.46 <0.50 <0.16 <br /> Dichlorodifluoromethane <0.76 <0.76 <0.76 <0.76 (2.7") <0,76 <0 76 <0.088-<031 <031 <0.37 <0 14 <0.37 <0.11 <0.31 <0.50 <0.36 <br /> 1,2 Dichloropropane <0.74 <0.74 <0.74 <0.22 <0.74 <0,22 <0.22 <0.32 <0.32 <0 078 <0.32 <0.32 <0.32 <0.060 <0.32 <0.50 <0 14 <br /> Methylene Chloride <1.9 (7.2'x) (2.3-) (0.45*) (7.2-) <0.11 <0.11 <0.23 <0.23 <2.1 <0.23 <0.23 <0.23 <0.056 <0.23 <1.0 <0.40 <br /> Tetrachloroethene <0.57 <0.57 <0.57 <0.20 <0.057 <0.20 <0.20 <0.44 <0.44 <027 <0.44 <0.44 <0.44 <0.12 <0.44 <0.50 0.23 <br /> Trichloroethane <br /> Toluene <0.18 <0.72 <0.18 <0.18 <0.32 <0.32 <0.21 <0.32 <0.32 <0.32 0.14* <0.32 <0.50 <0.14 <br /> Trichlorofluoromethane <0.54 <0.54 <0.54 <0.15 <0.54 <0.15 <0.15 <0.42 <0.42 <0.36 <0.42 <0.42 <0.42 <0.12 <0.42 <0.50 <0.41 <br /> Xylenes(Total) <0 84 <0.33 <0,84 <0.33 <0.33 <0.48 <0.48 <0.48 <0.48 <0.48 <0.48 <0.36 <048 <0.50 <0.36 <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 /> h4W-4,,Printed:3/22/2007 4 of 10 <br />