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30 March 2012 <br /> AGE-NC Project No. 97-0312 <br /> Page 2of8 <br /> • Drilling, soil sampling, and installation of soil vapor extraction wells; <br /> • Laboratory analysis of soil samples; <br /> • High vacuum SVE installation; <br /> • Operation of HVSVE for a minimum time period of six months; and <br /> • Evaluation of the remediation with preparation of a report of findings. <br /> The tasks for the proposed scope of work are discussed below. <br /> 2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable site permits will be obtained from the EHD (i.e. drilling/well installation permits) <br /> and San Joaquin Valley Air Pollution Control District (i.e. authority to construct and permit <br /> to operate). In addition, an update to the health and safety plan presently on-file will be <br /> prepared in accordance with Occupational Safety and Health Guidance Manual for <br /> Hazardous Waste Site Activities (National Institute for Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior <br /> to mobilization, all underground drilling and trenching areas will be clearly marked and a <br /> utility clearance obtained through Underground Service Alert. <br /> 2.2. WELL INSTALLATION AND SURVEY <br /> Based on the most recent ground water monitoring data, the average depth to ground <br /> water at the site is approximately 60 feet bsg. <br /> Currently, monitoring well MW-5 is screened through the vadose zone and is located in <br /> or near the suspected core area of the soil gasoline-impacted area at the site; AGE <br /> anticipates utilizing the monitoring well system on site as observation wells during remedial <br /> operation. Due to multiple plumes on site and the differing depths and orientation to which <br /> they occur, the plumes will be treated as separate contamination events. Therefore, AGE <br /> is proposing to install the high vacuum SVE wells at different depths. Wells will be installed <br /> in the following locations: <br /> • A four-inch diameter, high vacuum SVE well (VW-7), screened between 15 and 30 <br /> feet bsg, will be located in the northern former tank pit, near boring 131; <br /> • A four-inch diameter, high vacuum SVE well (VW-8), screened between 15 and 30 <br /> feet bsg, will be located in the northern former tank pit, near borings B2 and B14; <br /> Advanced GeoEnvironmental,Inc. <br />