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1 <br /> 07 January 2000 <br /> AGE-NC Project No 95-0130 <br />' Page 3 of 5 <br />' mile and directed towards the northeast which is consistent with the general gradient and flow <br /> direction determined at the adjacent site (Wells Fargo Bank - 49 South Wilson Way) The ground <br /> water surface elevation at the site is approximately 11 feet to 21 feet above the slotted screen <br />' intervals in wells MW-1 through MW-5 and approximately 4 feet to 9 feet above the slotted screen <br /> intervals in wells VW-1C, VW-2A and VW-3A <br />' 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br />' TPH-g was detected in water samples collected from wells MW-5, VW-1C, VW-2A and VW-3A <br /> at concentrations as high as 210,000 micrograms per liter (µg/1) <br />' Various BTEX compounds were detected in water samples collected from MW-2, MW-3, MW-5, <br /> VW-1C, VW-2A and VW-3A at concentrations as high as 45,000 µg/1 (VW-1C) The greatest <br />' benzene concentrations were detected in the water sample collected from VW-1C at 38,000 µg/l <br /> MTBE was detected by EPA Method 8020 in water samples collected from wells MW-2, MW-3, <br /> VW-2A, and VW-3A at concentrations as high as 11,000 µg/l (VW-3A) <br /> MTBE was detected utilizing EPA Method 8260 Modified in water samples collected from wells <br /> MW-2, MW-3, VW-2A and VW-3A at concentrations ranging between 1 1 µg/l and 8,400 µg/1 <br /> TBA was detected in water samples collected from wells MW-3 and MW-5 at concentrations as high <br /> as 80 µg11 No other fuel oxygenated compounds were detected during the laboratory analysis <br /> Analytical results of the ground water samples are summarized in Table 2 The laboratory reports <br /> (Castle Analytical Laboratory Reference No 2535 and McCampbell Analytical Inc I D 23533 <br /> through 23540) and chain-of-custody forms are presented in Appendix B <br /> I <br />' 4 0. DISCUSSION AND CONCLUSIONS <br /> Based upon data collected during the October 1999 monitoring event, AGE concludes <br /> • Ground water was inferred to be flowing toward the northeast in the area containing wells <br /> MW-1 through MW-5 at a calculated gradient of 0 006 ft/ft (Figure 3) <br /> • Due to the low gradient at the site, slight variations in ground water measurements or <br /> changes of recharge/discharge of the local ground water could greatly modify ground water <br /> flow direction <br /> • Wells MW-1 through MW-5, VW-1C, VW-2A and VW-3A are "drowned", and yield <br /> samples representative of deeper ground water conditions <br /> Adianccd GcoEmironmental,Inc <br />