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i i 21 August 2000 AGE-NC Project No 97-0343 Page 4 of 9 extent of petroleum hydrocarbon impaction The assessment activities will consist of the following tasks • Permitting and pre-field work activities, • Drilling and soil sample collection, • Monitoring well installation and development, • Ground water sample collection, • Preparation of a report of findings 3 1 PERMITTING AND PRE-FIELD WORK ACTIVITIES 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 Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration, US Coast Guard and US Environmental Protection Agency, 1985) Prior to mobilization, each monitoring well location will be clearly marked and a utility clearance obtained through Underground Service Alert 32 DRILLING AND SOIL SAMPLE COLLECTION AGE proposes to install four ground water monitoring wells at the site as part of site assessment activities Proposed well locations are illustrated in Figure 2 Based on soil contamination encountered beneath and surrounding the former UST area, AGE proposes ground water monitoring well installations in the following locations • Between 15 and 25 feet north of monitoring well MW-1 to assess dissolved petroleum hydrocarbon concentrations downgradient of the former UST area, • Between 25 and 35 feet west of monitoring well MW-1 to assess the extent of dissolved petroleum hydrocarbons crossgradient of the former UST area, • Between 25 and 35 feet east of monitoring well MWA to assess the extent of dissolved petroleum hydrocarbons crossgradient of the former UST area, • Between 25 and 35 feet south of monitoring well MW-1 to assess the extent of dissolved • petroleum hydrocarbons upgradient of the former UST area Advanced Geo Environmental,Inc