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t12 August 2002 <br /> AGE-NC Project No 95-0103 <br /> ' Page 7of11 <br /> ' 24 April and 30 May 2002 (Table 3) Based on approximately 226,147 gallons of water recorded on <br /> 30 May 2002, AGE estimated that approximately 5,700 gallons of water was discharged per day <br /> during this time <br /> 1 <br /> 2 4 1 Laboratory Analysis of Influent Ground Water Samples <br /> ' Generally,the highest concentration of TPH-g and BTEX was detected in the extraction wells near <br /> the northern portion of the site The highest concentration of TPH-g was detected in the sample <br /> ' collected from EW-3 at 27,000 micrograms per liter (µg/l) on 30 May 2002, the highest <br /> concentrations of BTEX compounds were also detected in the same sample at 1,600 µg/l benzene, <br /> 1,300 µg/l toluene, 5,400 pg/l ethylbenzene and 5,400 µg/l xylenes MTBE was not detected in the <br /> ' influent ground water samples analyzed <br /> Although the sample collected from well VW-6 had significant concentrations of TPH and BTEX, <br /> ' this well mostly produces silty water and will no longer be used for extraction due to low water <br /> production <br /> ' ! Analytical results of pump and treat water samples are summarized in Tables 1, laboratory reports <br /> are provided in Appendix C <br /> 2 4 2 Laboratory Analysts of Effluent Ground Water Samples <br /> ' Laboratory analysis of ground water samples collected from the effluent stream on 24 April and <br /> 30 May 2002 did not detect any petroleum constituents of concern The analytical results are <br /> ' summarized in Table 1, laboratory reports are provided in Appendix C <br /> ' 2 7 MASS-VOLUME REMOVAL CALCULATIONS <br /> During the second quarter 2002, an estimated 1 53 lbs of benzene and 27 lbs of TPH-g were <br /> extracted from ground water First quarter 2002 mass-volume calculations from the ground water <br /> pump-and-treat system are presented in Appendix D <br /> 1 <br /> Advanced GcoEnvironmental,Inc <br />