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TABLE 2 <br /> Foothill Sanitary Landfill <br /> First Semester 2005 Groundwater Monitoring Results <br /> Units m I unless noted <br /> Sampling Designation MW-1 MW-2R LW-1 MW-3 Conc. <br /> sampling Date 02/02/05 02/02/05 02/02/05 02/02/05 Limit <br /> Monitoring and Field Parameters <br /> Elevations <br /> Top of Casing Elevation (ft) 256.25 296.24 317.35 NR <br /> Depth to Groundwater(ft) 205.74 254.51 NR 271.46 NR <br /> Groundwater Elevation (ft) 50.51 41.73 45.89 NR <br /> General Water Quality Parameters F <br /> Temperature (°C) (field) 18.1 18.8 16.9 NR <br /> Chloride 5 2 "[) 10 9.6 <br /> Nitrate-Nitrogen 2.4 2.6 {`t 3.2 3.3 <br /> Total Dissolved Solids 130 150 190 190 240 <br /> Sulfate 4 2 6 8.7 <br /> pH (units) (field) 7.14 7.14 7 - 6.88 6.3-8.9 <br /> Electrical Conductivity(pS/cm) (field) 246 221 X12 : 290 466' <br /> Turbidity(NTU) (field) 14.9 9.8 10.6 45' <br /> Calcium 15.9 16 21.6 23 ' <br /> Potassium 2.6 4.1 '4 4 7.6' <br /> Magnesium 7.8 7.7V. <br /> 8; 11.4 13' <br /> Sodium 8.5 13.2 #2t 17.2 15 ' <br /> Alkalinity, Carbonate ND ND ND-' ND 0.808 <br /> Alkalinity, Bicarbonate 77 85 1 <br /> 06 110 120 <br /> Cyanide NR NR R _ NR TBD <br /> Sulfide NR NR lR NR 0.5 <br /> Volatile Organic Compounds WWI-) <br /> Acetone ND {3.7*} (3.4*) detect <br /> Chloromethane ND {0.28*} {0.28*} detect <br /> All Other Compounds ND ND N ND detect <br /> Semi-Volatile Organic Compounds (ug/L) <br /> Bis(2-ethylhexyl)phthalate NR NR NR 98 2 detect <br /> 'Concentration Limit established using statistical analysis <br /> 2 Compound was reported 7-22-04 and retested this semester <br /> TBD=To be determined when enough data is collected for statistical analysis <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 /> LW-1 sampling/testing is not part of monitoring program <br /> Foothill Sanitary Landfill Department of Public Works/Solid Waste <br /> 1ST Semester 2005 Groundwater Monitoring County of San Joaquin-July 29,2005 <br />