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N 17 July 2001 AGE-NC Project No. 97-0327 Page 2 of 7 • Report preparation. 2.1. PERMITTING AND PRE-FIELD WORK PREPARATIONS Applicable site assessment permits will be obtained from the PHS-EHD. In addition, an update to the health and safety plan presently on-file will be prepared in accordance with Occupational Saf,tv and Health Guidance Manual for Hamrdous Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, the proposed ground water monitoring well and boring locations will be clearly marked and a utility clearance obtained through Underground Service Alert. 2.2. DRILLING AND SAMPLING AGE proposes to drill three soil borings and install one ground water monitoring well at the site as part of the site assessment. Ground water monitoring well MW-4 will be installed to assess the horizontal extent of petroleum hydrocarbon-impacted ground water;three soil borings(P-9, P-10 and P-11) will be advanced to define the horizontal and vertical extent of petroleum hydrocarbons in ground water and soil. Proposed monitoring well and soil boring locations are illustrated in Figure 2. Based upon laboratory results of soil and ground water samples collected during the investigation, AGE proposes one ground water monitoring well and three soil borings in the following areas: 1 U • Soil boring P-9 located between 50 and 60 feet north-northeast of well MW-2 to assess petroleum hydrocarbon-impacted soil and ground water crossgradient from the UST area. l • Soil boring P-.1-Y located between 30 and 40 feet northeast of well MW-3 to assess petroleum airy hydrocarbon-impacted soil and ground water crossgradient from the UST area. 12 • Soil boring P-17 located between 5 and 10 feet east of well MW-2 to assess and monitor the vertical extent of dissolved petroleum hydrocarbon-impacted ground water downgradient from the UST area. • Monitoring well MW-4 located between 50 and 60 feet south of well MW-2 to assess petroleum hydrocarbon-impacted ground water downgradient from the UST area. Soil boring P-9 will be advanced to approximately 60 feet bsg, soil borings P-10 and P-1 I will be advanced to approximately 90 feet bsg and monitoring well MW-4 advanced to 65 feet bsg. Total depth of each boring may vary slightly according to hydrogeologic conditions encountered during Advanced GeoEnv ironme'ntal.Inc.