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f - 1 <br /> r <br /> 19 July 2005 <br /> AGE-NC Project No. 95-0135 <br /> Page 4 of 9 <br /> • DIPE was the only fuel additive detected in HU2 and HU3, at concentrations of 11 µg/1 <br /> (CPT 1-88) and 6.2 µg/1 (CPT 1-115). <br /> The ground water monitoring network has been sampled sixteen times since September 1997.Over <br /> that time span,the highest concentrations of dissolved hydrocarbons were detected in well MW-1, <br /> at the western edge of the site. <br /> law <br /> 3.0. SCOPE OF WORK <br /> To assess the vertical and lateral extent of hydrocarbon-and MTBE-impacted soil and ground water <br /> on and near the site, completion of the following tasks is required: <br /> Lam. <br /> • Permitting and pre-field work activities; <br /> • Pilot drilling and soil sample collection; <br /> • Monitoring well installation and development; <br /> • Laboratory analysis of soil samples; <br /> • Ground water sampling and analysis; and <br /> • Preparation of a report of findings. <br /> f <br /> t"" 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> A site assessment boring permit will be obtained from the EHD for all on-site and off-site boring <br /> t" locations. A revocable permit and then an encroachment permit will be obtained from the City of <br /> Stockton Public Works Department. An update to the health and safety plan presently on-file will <br /> be prepared in accordance with Occupational Safety and Health Guidance Manual for Hazardous <br /> Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S. <br /> Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, the area of <br /> excavation will be clearly marked and a utility clearance obtained through Underground Service <br /> Alert. <br /> 3.2. DRILLING AND SOIL SAMPLE COLLECTION <br /> �.�. AGE proposes to advance seven pilot soil borings at the site for the installation of ground water <br /> monitoring wells.The pilot borings will be advanced using a CME-95 or CME-75HT truck-mounted <br /> Advanced GeoEnviron mental,Inc. <br /> Lo <br />