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18 November 1999 <br /> AGE-NC Project No. 97-0327 <br /> Page 4 of 9 <br /> • Ground water sample collection <br /> • Receptor survey; <br /> • Preparation of a report of findings. <br /> 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable site assessment permits will be obtained from the PHS-EHD. In addition, an update to <br /> the health and safety plan presently on file will be prepared in accordance with Occupational Safet}, <br /> _ and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for <br /> Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental <br /> Protection Agency, 1985). Prior to mobilization, each monitoring well location will be clearly <br /> marked and a utility clearance obtained through Underground Service Alert. <br /> 3.2. DRILLING AND SOIL SAMPLE COLLECTION <br /> AGE proposes to install three ground water monitoring Nvells at the site as part of site assessment <br /> - activities. Proposed well locations are illustrated in Figure 2. <br /> Based on soil and ground water contamination encountered beneath the former UST area, AGE <br /> proposes ground water monitoring well installations in the following locations: <br /> • Between 15 and 25 feet southeast of boring P-8 to assess adsorbed and dissolved petroleum <br /> hydrocarbon concentrations upgradient of the UST area, <br /> • Between 20 and 30 feet southwest of boring P-6 to assess the extent of adsorbed and <br /> dissolved petroleum hydrocarbons crossgradient of the UST area, <br /> • Between 10 and 20 feet north-northeast of boring P-7 to assess the extent of adsorbed and <br /> dissolved petroleum hydrocarbons down-gradient the former UST area; <br /> The proposed ground water monitoring well locations will be advanced to approximately 70 feet bsg <br /> utilizing a truck-mounted, hollow stem drill rig. Total depths of borings may vary according to <br /> hydrogeologiclgeologic conditions encountered during drilling activities. <br /> Selected soil samples will be analyzed by a State of California Department of Health Services <br /> (DHS)-certified laboratory for the following constituents: <br /> • TPH-g and TPH-d in accordance with EPA Method 8015 Modified/5030; <br /> Advanced GeoEnvironmental.Inc. <br />