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I18 October 2002 <br /> . AGE-NC Project No 95-0128 <br /> IPage 5 of 7 <br /> I 0 5 gg/1 In MW-6 to 690 gg/1 In MW-5 (see Figure 4) In addition,the lead scavenger 1,2-DCA was <br /> detected In sample MW-3 at a concentration of 1 5 gg/l <br /> No other target analytes were detected in the samples analyzed The analytical results are <br /> summarized on Tables 2 and 3 The laboratory reports for the quarterly monitoring event (MAI <br /> Laboratory Work Order 0208287), quality assurance and quality control (QA/QC) reports and the <br />' chain-of-custody form are Included In Appendix B <br /> I3 3 ANALYTICAL RESULTS OF GROUND WATER TREATMENT SAMPLES <br /> TPH-g, Benzene and MTBE were detected In the July influent sample at concentrations of <br /> 2,800 gg/l, 160 µg11 and 200 gg/l, respectively, the remaining BTEX compounds were detected at <br /> concentrations ranging up to 390 gg/l (xylenes) <br /> ITPH-d, TPH-g, Benzene and MTBE were detected In the August Influent sample at concentrations <br /> of 1,200µg/l,2,100 gg/l,250µg/1 and 270µg/l,respectively,the remaining BTEX compounds were <br />' detected at concentrations ranging up to 350 µg/l (xylenes) <br /> TPH-g, TPH-d, MTBE and BTEX were not detected In the effluent samples <br />' The analytical results are summarized on Table 4 The laboratory reports for the quarterly monitoring <br /> event (MAI Laboratory ID No 0207204-01/02 and 0208287-07108), quality assurance and quality <br /> control (QA/QC) reports and the chain-of-custody form are Included In Appendices B and C <br /> 3 4 MASS CALCULATION OF RECOVERED PRODUCT <br /> The mass of hydrocarbons removed was calculated from the volume of water treated and the <br /> concentrations from laboratory analysis A total volume of 168,211 gallons was extracted between <br /> 05 June and 15 August 2002, based on effluent flow meter observations <br /> Based on the total water volume extracted, 0 18 kg or 0 39 lbs of MTBE, 0 16 kg or 0 35 lbs of <br /> benzene and 2 2 kg or 4 9 lbs of TPH-g were removed from the site and treated <br /> The hydrocarbon mass removal calculations and the concentrations of the Influent samples over time <br /> are displayed In Appendix D <br /> IAdvanced GcoEnvironmental Inc <br />