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TABLE 1 <br /> FOOTHILL SANITARY LANDFILL <br /> SECOND SEMESTER 2003 GROUNDWATER MONITORING RESULTS <br /> (Units mg/l unless noted) <br /> Samtin _Designation MW-1 MW-2R LW-1 MW-3 Conc. <br /> Sampling Date 8/13/2003 8/13/2003 8/14/2003 8/14/2003 Limit <br /> Monitoring and Field Parameters <br /> Elevations <br /> Top of Casing Elevation (ft) 254.69 296.24 317.35 NA <br /> Depth to Groundwater(ft) 205.18 254.12 NR 271.27 NA <br /> Groundwater Elevation (ft) 49.51 42.12 46.08 NA <br /> General Water Quality Parameters <br /> Temperature (OC)(field) 21.6 21.9 19.1 19.6 NA <br /> Electrical Conductivity(pS/cm) (field) 208 203 171 ` 274 349' <br /> pH (units) (field) 7.42 6.58 6.86 7.02 6.3-8.9 <br /> Turbidity(NTU) (field) 12.6 5.2 2.7 6.7 47' <br /> Total Dissolved Solids 170 150 180 190 240 <br /> Chloride 6.4 6.7 12 11 9.6 <br /> Sulfate 6.3 2.4 19 7.6 8.7 <br /> Nitrate- Nitrogen 3.3 3.1 1.3 3.8 3.3 <br /> Carbonate ND ND ND ND 0.808 <br /> Bicarbonate 96 84 100 110 120 <br /> Calcium 19 15 24 25 NE <br /> Magnesium 9.7 8.6 9.9 13 NE <br /> Potassium ND 1.4 ND 1.5 NE <br /> Sodium 11 12 12 18 NE <br /> Volatile Organic Compounds /I- <br /> Acetone {1.0`) {0.90") {1.2'} {1.4*) detect <br /> Chloromethane {0.19') ND ND {0.22') detect <br /> Methylene chloride (0.24`) ND {0.28*) {0.28") detect <br /> All Other Compounds ND ND ND ND detect <br /> Concentration Limit established using statistical analysis <br /> NA=Not Applicable <br /> ND= Not Detected <br /> NR=Not Required <br /> NE = Not established due to insufficient data <br /> {X)Parameter also detected in one or more quality control blanks <br /> "=Trace concentration (estimated value) <br /> LWA sampling/testing is not part of monitoring program <br /> _ Foothill Sanitary Landfill Department of Public Works/Solid Waste <br /> 2NO Semester/Annual 2003 Groundwater Monitoring County of San Joaquin-January 30,2004 <br />