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Table 3 <br /> First Semester 2011 (2nd Quarter 2011) Groundwater Monitoring Results <br /> ® Foothill Sanitary Landfill <br /> (Units mg/I unless noted) <br /> Sampling Designation MW-1 MW-2R MW-3 MW-4 MW-5 Conc. <br /> Sampling Date 4/13/2011 4/13/2011 4/13/2011 4/13/2011 4/13/2011 Limits <br /> Monitoring and Field Parameters <br /> Elevations feet <br /> TOC Elevation 258.43 299.62 320.75 341.57 256.52 NR <br /> Depth to Groundwater 207.91 255.78 273.06 285.61 217.15 NR <br /> Groundwater Elevation 50.52 43.84 47.69 55.96 39.37 NR <br /> General Water Quali Parameters <br /> Temperature -C field NR NR 18.6 NR NR NR <br /> H units field NR NR 7.49 NR NR 5.8-8 <br /> Electrical Conductivity NR NR 407.3 NR NR 430 <br /> uS/cm (field) <br /> Turbidity NTU field NR NR 13.9 NR NR 73 <br /> Constituents of Concern <br /> Calcium NR NR NR NR NR 24 <br /> Magnesium NR NR NR NR NR 13 <br /> Sodium NR NR NR NR NR 17 <br /> Potassium NR NR NR NR NR 4.7 <br /> Bicarbonate Alkalinity as NR NR NR NR NR 180 <br /> ® HCO3 <br /> Carbonate Alkalinity as NR NR NR NR NR 0.81 <br /> CaCO3 <br /> Chloride NR NR NR NR NR 10 <br /> Nitrate as Nitrogen NR NR NR NR NR 1.8 <br /> Sulfate NR NR NR NR NR 8.7 <br /> Total Dissolved Solids NR NR NR NR NR 260 <br /> Volatile Organic Compounds (8260B)(uq/Lj <br /> 1,1-Dichloroethene NR NR 0.64 NR NR detect <br /> Trichloroethene NR NR 1.2 NR NR detect <br /> All Compounds NR NR NR NR NR detect <br /> NE = Not Established <br /> ND= Not Detected <br /> NM = Not Measured <br /> NR = Not Required <br /> I = Insufficient data for statistical analysis <br /> *=Trace concentration (estimated value) <br /> Bold values indicate VOC detections <br /> Underlined values indicate concentration limit exceedances <br /> MW-3 was resampled for VOCs only. <br /> LWA sampling/testing is not part of the monitoring program <br /> [1] Not established due to>50% non-detects <br /> 1 Parameter also detected in one or more quality control blanks. <br /> Foothill Sanitary Landfill 15 Department of Public Works/Solid Waste <br /> 1"Semester 2011 Groundwater Monitoring County of San Joaquin—July 31,2011 <br />