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08 July 1999 <br /> AGE-NC Project No. 95-0130 <br /> Page 5 of 10 <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 Safety <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 proposed monitoring well location will be <br /> clearly marked and a utility clearance obtained through Underground Service Alert. <br /> 3.2. CPT DRILLING AND SOIL SAMPLE COLLECTION <br /> In addition to the already PHS-EHD approved on-site CPT borings(letter dated 03 June 1999),AGE <br /> proposes advancement of two additional CPT off-site borings approximately 90-100 feet northeast <br /> of MW-3 (Figure 2). <br /> The CPT borings shall be advanced to approximately 100 feet bsg utilizing a 25-ton truck-mounted <br /> CPT drill rig equipped with 2-inch diameter hollow-stem rods;however,total depths of borings may <br /> vary according to hydrogeologic 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 in accordance with EPA Method 8015 Modified/5030; <br /> • BTEX and MTBE in accordance with EPA Method 8020; and <br /> • Fuel oxygenated compounds including MTBE,TBA,TAME,di-isopropyl ether(DIPE),and <br /> ethyl tertiary-butyl ether (ETBE) by EPA Method 8260. <br /> Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> findings and recommendations. <br /> 3.3. MONITORING WELL COMPLETION AND DEVELOPMENT <br /> Eight ground water monitoring wells will be installed at the site to assess petroleum hydrocarbon <br /> impacts to shallow ground water. Proposed monitoring well locations are illustrated on Figure 2. <br /> Well locations are proposed to provide definition of the lateral extent of dissolved hydrocarbons. <br /> Advanced GeoEnvironmental,Inc. <br />