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TABLE 1-CONTINUED <br /> HARNEY LANE SANITARY LANDFILL <br /> FIRST QUARTER 2012 GROUNDWATER MONITORING <br /> Units m IL unless noted <br /> Sampling Designation MW-5 MW-6 MCL's <br /> Sampling Date 1/19/12 Conc. Limit 1/19/12 Conc. Limit Mg/L <br /> Monitoring and Field Parameters <br /> Elevations(feet) <br /> TOC Elevation 88.74 NA 95.62 NA NR <br /> Depth to Groundwater 128.09 NA 132.68 NA NR <br /> Groundwater Elevation -39.35 NA -37.06 NA NR <br /> General Water Qualitv Parameters <br /> Temperature(°C) 15.8 NA 14.0 NA NR <br /> Electrical Conductivity 890.3 [3) 322.2 [3] NL <br /> uS/cm field <br /> pH (units)(field) 6.86 [3] 7.40 [3] 6.5-8.5 <br /> Turbidity(NTU)(field) 14.9 [3] 12.6 [3] NL <br /> Oxygen Reduction 170 [3] 170 [3) NL <br /> Potential my <br /> Dissolved Oxygen (mg/1) 1.16 [3] 1.24 [3] NL <br /> Constituents of Concern <br /> Calcium 83 [3] 21 [3] NL <br /> Magnesium 46 [3] 9.9 [3] NL <br /> Sodium 45 [3] 29 [3] NL <br /> Potassium 5.6 [3] 2.8 [3] NL <br /> Bicarbonate 480 [3] 140 [3] NL <br /> Total Alkalinity as CaCO3 390 [3] 120 [3] NL <br /> Chloride 58 45 22 45 250 <br /> Nitrate as N 0.67 25 1.6 25 10 <br /> Sulfate 19 20 3.1 20 NL <br /> Dissolved Hardness as 400 [3] 93 [3] NL <br /> CaCO3 <br /> Total Dissolved Solids 570 [3] 200 [3] 500 <br /> Chemical Oxygen Demand 16* [3] 7.4* [3] NL <br /> Volatile Organic Compounds u /L <br /> Dichlorodifluoromethane 0.86 detect ND detect NL <br /> Tetrachloroethene {0.29)* detect ND detect 5.0 <br /> All Other Compounds ND detect ND detect NR <br /> NA=Not Available NR=Not Required Incr=Increasing NL=Not Listed <br /> ND=Not Detected NS=Not Sampled Decr=Decreasing <br /> [1]Not established due to>50%non-detects <br /> [2]Not established statistically due to significant increasing trend. Concentration limit from WDRs. <br /> [3]Not established statistically due to less than required data for calculation. <br /> *=Trace concentration(estimated value) <br /> {}Analyte was detected in one or more lab blanks. <br /> Underlined values indicate a concentration limit exceedance. <br /> Bold values indicate a detected organic compound. <br /> Conc.Limit as calculated by Sanitas using Historical Data. <br /> Harney Lane Sanitary Landfill Department of Public Works/Solid Waste <br /> 1"Semester 2012 Groundwater Monitoring Report County of San Joaquin—July 31,2012 <br />