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r (MW-1, MW-2, MW-3 and MW-4 respectively) installed on site The elevation of groundwater rin MW-1, MW-2, MW-3 and MW-4 was calculated by EI to be at 17 08, 17 58, 17 12 and 17 22 • feet below mean sea level respectively, based upon casing elevation data from Kier & Wright rCivil Engineers and Surveyors r30 FINDINGS r3.9 Groundwater Level Measurements The elevation of groundwater in MW-1, MW-2, MW-3 and MW-4 was calculated by El to be at r30 10, 31 00, 29 96 and 29 57 feet below mean sea level respectively on 25 June 2002 _ ' El utilized the groundwater measurements to determine the direction of groundwater flow and the groundwater gradient present beneath the surface The groundwater direction of flow for the ' area was inferred northerly at a gradient of 0 002 ft/ft to 0 005 ft/ft The groundwater elevation at the site increased an average one (1)foot between March 2002 and ' June 2002 The gradient increased slightly during that period Groundwater elevations are listed in Table 1,-and shown graphically in Figur X s� ' 3.2 Groundwater Sample Analysis Results The groundwater was sampled on 25 June 2002 1\4W-1 continued to show diesel contamination at a level similar to that found in the previous quarter Gasoline contamination, however, has decreased No MTBE or BTEX was evident kb, 4AAJ�10 b Uf..A'OX `� \Ut t- �- y4ly nta 0 J'PY` MW-2 shows significant motor oil contamination as well as moderate contamination from diesel Minor contamination from gasoline, oxygenates and BTEX remains, but no MTBE contamination MW-3 is free from contamination once again MW-4 continued to showed gasoline, BTEX, DIPE and diesel contamination as well as an appearance of ethyl benzene and total xylenes contamination 1 All groundwater samples secured by EI were logged in a chain-of-custody form, placed in an on- Environeenng,Inc Project No 02.00716 page 3