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f j 10 February 2009 AGE-NC Project No. 95-0173 Page 2 of 8 an SVE rebound test at the site by collecting independent SVE air samples from vapor extraction wells VW-1 through VW-7. Drilling and field activities will consist of the following tasks: • Permitting and pre-field work activities, • Drilling of soil borings and collection of soil vapor and soil samples, • Installation of SVE remediation wells (if warranted), • Conduct SVE remediation rebound test, • Preparation of report of findings. Each of these tasks are discussed below in detail. 2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES Applicable drilling and/or well permits will be obtained from the San Joaquin County Environmental Health Department. 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, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, all underground trenching areas 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 (B-11, B-12 and B-13) at the site as part of the site confirmation. Proposed soil boring locations are illustrated in Figures 2 and 3. IIAGE proposes Based upon laboratory results of soil samples collected during the investigation, p poses the soil boring locations in the following areas: • Soil boring B-11 will be located adjacent the southwest corner of the former UST area, and between 10 and 20 feet northeast of well VW-3 to assess potential vapor intrusion and to confirm cleanup progress of petroleum hydrocarbon-impacted soil. 14 • Soil boring B-12 will be located adjacent the northwest corner of the former UST area, and Advanced GeoEnvironmental,Inc.