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TABLE 2 <br /> FOOTHILL SANITARY LANDFILL <br /> FIRST SEMESTER 2008 GROUNDWATER MONITORING RESULTS <br /> (Units mg/I unless noted) <br /> Sampling Designation MW-1 MW-2R MW-3 MW-4* MW-5* Conc. <br /> Sampling Date 2/5/08 2/6/08 2/6/08 2/5/08 4/1/08 Limits <br /> TOC Elevation 258.43 299.62 320.75 TBD TBD NR <br /> Depth to Groundwater 206.54 254.78 271.72 283.58 215.86 NR <br /> Groundwater Elevation 51.89 44.84 49.03 NR <br /> Temperature ( ) 18.3 17.6 17.7 11.6 19.9 NR <br /> field <br /> Chloride 5.65 5.58 9.58 7.1 8.72 10 <br /> Nitrate as Nitrogen 2.88 2.64 2.87 1.70 1.71 3.4 <br /> Total Dissolved Solids 150 190 140 170 160 270 <br /> Sulfate 4.84 1.87 6.41 9.88 9.93 8.9 <br /> pH units field 7.26 7.51 7.32 8.24 7.58 5.8-8.9 <br /> Electrical Conductivity 391 254 378 371 258.8 470 <br /> uS/cm (field) <br /> Turbidity NTU field 39.7 8.1 11.3 46.3 12.9 73 <br /> Calcium 18 21 16 22 22 30 <br /> Magnesium 9.9 12 8.1 11 11 25 <br /> Potassium 2.8 3.6 3.3 3.9 3.6 19 <br /> Sodium 10 16 12 13 14 1 18 <br /> Bicarbonate Alkalinity 130 150 110 150 130 110 <br /> Carbonate Alkalinity as ND ND ND ND ND 2 <br /> CaCO3 <br /> Volatile Organic Compounds fug/L) <br /> All Compounds ND ND ND ND ND detect <br /> Or anos horus Com ounds u /L <br /> Azinopos methyl ND ND ND ND 0.14 detect <br /> Guthion <br /> All Other Compounds ND ND ND ND ND detect <br /> ND = Not Detected <br /> NE = Not Established due to > 50% non-detects <br /> NR = Not Requested <br /> [1] = Not Established due to > 50% non-detects <br /> * =Trace concentration (estimated value) <br /> {} = Parameter also detected in one or more quality control blanks <br /> TBD =To be determined <br /> Bolded values indicate VOC detections, underlined values indicate concentration limit <br /> exceedances. <br /> LW-1 sampling/testing is not part of the monitoring program <br /> * Insufficient data from newly installed wells to apply concentration limit <br /> Foothill Sanitary Landfill 13 Department of Public Works/Solid Waste <br /> 1"Semester 2008 Groundwater Monitoring County of San Joaquin-July 31,2008 <br />