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Table 2 <br /> is First Semester 2012 (1St Quarter 2012) 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 1/11/2012 1/11/2012 1/11/2012 1/11/2012 1/11/2012 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 208.03 255.88 273.24 285.82 217.25 NR <br /> Groundwater Elevation 50.40 43.74 47.51 55.75 39.27 NR <br /> General Water Quality Parameters <br /> Temperature -C field 15.9 16.4 18.0 17.1 17.3 NR <br /> H units field 7.28 7.69 7.68 7.40 7.49 5.8-8.9 <br /> Electrical Conductivity 257.8 196.1 268.9 264.1 259.1 710 <br /> (uS/cm)(field <br /> Turbidity NTU field 11.8 9.6 10.1 11.7 11.7 66 <br /> Constituents of Concern <br /> Calcium 19 16 22 23 21 25 <br /> Magnesium 10 8.3 12 12 11 17 <br /> Sodium 12 . 12 16 15 15 17 <br /> Potassium 3.4 3.2 3.6 4.2 3.6 15 <br /> Bicarbonate Alkalinity as 110 96 130 130 120 130 <br /> HCO3 <br /> Carbonate Alkalinity as ND ND ND ND ND 0.81 <br /> CaCO3 <br /> Chloride 5.4 5.1 8.9 6.6 8.0 13 <br /> Nitrate as Nitrogen 2.9 2.7 2.6 1.7 1.7 12 <br /> Sulfate 4.2 1.5 5.8 8.3 8.5 10 <br /> Total Dissolved Solids 180 1 170 210 220 180 250 <br /> Volatile Organic Com ounds 8260B u /L <br /> 1,1-Dichloroethene ND ND 0.58 ND ND detect <br /> Trichloroethene ND ND 1.0 ND ND detect <br /> All Other Com ounds ND ND ND ND ND detect <br /> NS = Not Sampled, water level too low for sampling <br /> NE= Not Established <br /> ND= Not Detected <br /> NM = Not Measured <br /> NR= Not Required <br /> 1 = Insufficient data for statistical analysis <br /> *= concentration (estimated value) <br /> Bold values indicate VOC detections <br /> Underlined values indicate concentration limit exceedances <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 /> MWA was not sampled this semester because the pump would not pump any water <br /> Foothill Sanitary Landfill 15 Department of Public Works/Solid Waste <br /> 1 s'Semester 2012 Groundwater Monitoring County of San Joaquin-July 17,2012 <br />