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10 January 2001 <br /> AGE-NC Project No 98-0533 <br /> Page 4 of 6 <br /> 37 COLLECTION OF DOMESTIC GROUND WATER SAMPLES <br /> On 26 June 2000, AGE representatives collected groundwater samples from domestic well DW-1, <br /> located at the site (Figure 2), to venfy that domestic water has not been impacted by any <br /> unauthorized hydrocarbons releases at the site The samples were properly labeled, placed in a <br /> chilled container and transported under chain-of custody to McCampbell Analytical, Inc The <br /> Ianalytical procedures are the same as Section 3 6 <br /> I4.0 FINDINGS <br /> I` Soil descriptions, ground water elevation, and flow direction were determined from field data, <br /> hydrocarbon-impacted soil and groundwater were assessed by laboratory analysis of soil'and ground <br /> water samples <br /> I j <br /> 41 STRATIGRAPHY <br /> A general subsurface stratigraphy was developed for the site (Figures 4A and 4B) based on the <br /> boring-log soil descriptions The upper 15 feet consist of a silt layer which transitions to sand <br /> I towards the south (Figure 4B) Below the silt is an approximately 10-foot sand layer which fines <br /> southwards Below the sand layer, the stratigraphy consists of alternating silt and clay layers, two <br /> clay layers, at approximately 45 and 70 feet bsg, appear continuous between boreholes (see Figures <br /> 4A and 4B) <br /> A continuous sand layer approximately 5 feet thick, and which thickens towards the south, was <br /> encountered beneath the zone of alternating clay and silt The sand layer is sandwiched between a <br /> clay layer above and silt below Since the initiation of ground water monitoring, the water table has <br /> been-located within this sand layer <br /> t <br /> I4 2 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> The elevation of ground water in each well was calculated by subtracting the depth to ground water <br /> I from the surveyed relative casing elevations (Table 1) Depths to ground water ranged from 72 04 <br /> to 72 40 feet bsg Ground water elevations at the site ranged from 14 98 feet (MWA) to 15 18 feet <br /> (MW-3) below mean sea level Theground water gradient was calculated to be 0 022 ft/ft directed <br /> Itowards the southeast Figure 3 illustrates the contoured ground water elevations as measured on 05 <br /> • July 2000 <br /> I <br /> IAdvanced Gen Environmental,Inc <br />