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12 August 2002 AGE-NC Project No. 99-0645 Page 3 of 8 3.1 PRE-FIELD WORK ACTIVITIES Upon EHD approval of this work plan, AGE will secure all relevant city and/or county permits and prepare a health and safety plan in accordance with Occupational Safetv 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). AGE will notify the EI-ID a minimum of 48 hours prior to commencement of any work. Prior to mobilization, the area,6fexcavation*111 be clearly marked and an utility clearance obtained through Underground Service Alert. 3?. INSTALLATION OF SOIL BORINGS AND REMEDIATION WELLS Based on soil data collected during the ongoing investigation of petroleum-hydrocarbon impact,AGE proposes installation of two additional soil borings and three sets of SVE wells, comprised of one shallow well and one deep we1L in the following areas: • A soil boring east of well MW-1, to a depth of 70 feet bsg; • A soil boring at the location of soil boring B6, angle drilled to a vertical depth of 70 feet bsg; • A set of'SVE wells in the former UST area, at well MW-l; • A set of SVE wells approximately 10 feet south of boring 134, and • A set of SVE wells at well MW-3. Proposed borings and SVE well locations are illustrated in Figure 2; soil vapor well installation procedures are described in Section 4.2. 3.3 SOIL SAMPLE ANALYSIS Selected soil samples fxom depths of 30 feet to 60 feet bsg or greater, collected from the borings and deep vapor wells will be analyzed by a State of California Department of Health Services (DHS)- certified laboratory for the following constituents: • Total petroleum hydrocarbons as gasoline (TPH-g) in accordance with EPA Method 8015 Modified; • Benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl tertiary butyl ether(M.TBE) in accordance with EPA Method 8020; and Advanced GeoEnvironmental,Inc.