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TABLE 1 <br /> HARNEY LANE SANITARY LANDFILL <br /> FOURTH QUARTER 2006 GROUNDWATER MONITORING RESULTS <br /> Units m /I unless noted <br /> Sampling Designation MW-1 MW-3 - _ <br /> MW 4 MW 2 im acted <br /> Conc. Conc. Conc. Conc. <br /> Sampling Date 10/18/2006 Limit 10/18/2006 Limit 10/18/2006 Limit 10/18/2006 Limit Trend <br /> Monitoring and Field Parameters <br /> Elevationsfeet) <br /> TOC Elevations 100.89 NA 88.46 NA 89.29 NA 93.09 NA NR <br /> Depth to Groundwater 132.5 NA 125.57 NA 124.97 NA 127.15 NA NR <br /> Groundwater Elevation -31.61 NA -37.11 NA -35.68 NA -34.06 4 NA NR <br /> General Water Quality Parameters <br /> Tem erature °C field 21.2 NA 19.9 NA 20.5 NA 20.8 NA NR <br /> Electrical Conductivity 673354 421 420 1091 1100 636 440 None <br /> uS/cm field 2 <br /> pH(units)(field) 6.68 6.2- 6.68 6.3- 7.39 6.3- 7.17 6.2- None <br /> 8.2 8.3 8.2 8.1 <br /> Turbidity NTU)(field) 20.9 58 10.11 17 2 18.2 57 17.8 _[221 Increasing <br /> Alkalinity, Bicarb 162 NE 90 180 82 490 138 180 None <br /> TKN 0.14* NE ND NE ND NE ND NE None <br /> 1 1 1 1 <br /> Total Dissolved Solids 280 [21 203 350 392 630 245 330 None <br /> Chloride 11 21 14 24[2] 120 152 29 27[2] Increasing <br /> 2 <br /> Nitrate-Nitrogen 2.4 15 1.4 6.3 2.0 20 1.6 6.7 None <br /> Sulfate 9.3 17 4.6 27 14 23 3.4 5.5 None <br /> Volatile Organic Compounds(ug/L) <br /> Tetrachloroethene ND detect ND detect ND detect 1.2 detect Increasing <br /> PCE <br /> 1,2-Dichloropropane ND detect ND detect ND detect 0.41* detect Increasing <br /> Dichlorodifluoromethane ND detect ND detect ND detect 1.8 detect None <br /> All Other Compounds ND detect ND detect ND detect ND detect None <br /> NR=Not Required <br /> ND=Not Detected <br /> NE=Not Established <br /> [1]Not established due to>50%non-detects <br /> [2]Not established due to statistically significant increasing trend. Concentration limits from WDRs. <br /> *=Trace concentration(estimated value) <br /> {}=Parameters also detected in one or more of the quality control blanks <br /> Underlined values indicate a concentration limit exceedance. Bolded values indicate a detected organic compound <br /> Harney Lane Sanitary Landfill Department of Public Works/Solid Waste <br /> 4'h Quarter and Annual 2006 Groundwater Monitoring Report County of San Joaquin-January 15,2007 <br />