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21 February 2000 <br /> AGE-NC Project No. 95-0185 <br /> ' Page 5 of 8 <br /> Ground Water Monitoring Wells <br /> • TPH-d was detected in ground water samples collected from monitoring wells MW-1, MW- <br /> 2, MW-3 and MW-4 at concentrations of 7,100 micrograms per liter (µg/1), 6,800,ug/l, 140 <br /> µg/l, and 75,000µg/l, respectively. TPH-g was detected only in ground water samples from <br /> wells MW-1 and MW-4 at concentrations of 180 µg/1 and 280 µg11, respectively. <br /> ' 0 Benzene was detected in wells MW-1,MW-3 and MW-4 at concentrations of 2.0 4g/l, 0.62 <br /> µg11 and 2.1 ug/l, respectively. Other BTEX compounds were detected in each of the wells. <br /> ' Analytical results of well ground water samples are summarized in Table 2. The laboratory report <br /> (MAI Laboratory I.D.Nos. 14858 and 14588),quality control and quality assurance data and chain- <br /> of-custody form are included in Appendix D. <br /> ' Grab Water Samples <br /> ' TPH-g was detected in three of the grab ground water samples collected from the site at <br /> concentrations ranging from 400 µg/l to 23,000 µg/l. TPH-d was detected in all five of the <br /> grab ground water samples analyzed at concentrations from 74 ,ug/l to 580,000 µg/1. <br /> • Benzene was detected in two of the water samples analyzed at concentrations of 67 µg/I in <br /> boring B5 and 370 µg11 in boring B2. Toluene was detected in.each of the water samples <br /> ' analyzed at concentrations ranging from 0.56 4g11 in boring B 14 to 57 µg11 in boring B2. <br /> Other BTEX compounds were detected at concentrations as high as 850 µg/1. <br /> ' MTBE was detected in four of the water samples analyzed at concentrations ranging from <br /> 2.1 µg11 in boring B 18 to 2,900µg/1 in boring B2. TBA was detected in three of the water <br /> samples analyzed at concentrations ranging from 12,ug/1 in boring B 14 to 270µg/1 in boring <br />' B5. <br /> Analytical results of grab ground water samples analyzed are summarized in Table 3. The laboratory <br /> reports (MAI Laboratory ID12442 to12446), quality assurance and quality control (QA/QC)reports <br />' and chain-of-custody forms are included in Appendix E. <br />' Ground Water Microbiological Analysis <br /> A water sample from well MW-1 was analyzed for bio-enumeration and physicochemical <br /> characterization by A. Keith Kaufman, M.S. <br /> The water sample was found to have concentrations of inorganic components sufficient to support <br />' a microfauha for bioremediation. Nitrogen, potassium and phosphates were at sufficient levels to <br /> support a microfauna for bioremediation. The water sample had moderate microbiological <br /> population as biodegraders. This population of bioremedateing microfauna indicates a possible <br /> 1 bioattenuatiori of the contaminates. - - <br /> Advanced GeoEnvi ron mental,Inc. <br /> 1 <br />