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r • 31 August 2004 AGE-NC Project No 95-0141 Page 2 of 6 and southeast of the former UST location Additionally, one well will be installed near the former UST location to monitor deeper petroleum hydrocarbon-impacted ground water (HU4) identified during Cone Penetrometer Testing ground water sampling performed in October 2002 Proposed well locations are included on Figure 2 The assessment will consist of the following tasks • Permitting and pre-field work activities, • Soil boring and sample collection and analysis, • Monitoring well installation and sampling, and • Report preparation 3 1 PERMITTING AND PRE-FIELD WORK ACTIVITIES . Applicable site assessment permits will be obtained from the San Joaquin County Environmental Health Department (EHD), an updated site health and safety plan will be prepared Prior to mobilization, each soil boring location will be clearly marked and a utility clearance obtained through Underground Service Alert The EHD will be contacted 48 hours prior to conducting investigation activities 3 2 WELL DRILLING AND SOIL SAMPLE COLLECTION Five ground water monitoring wells will be installed at the site to assess and monitor petroleum hydrocarbon-impacted ground water at the site Well locations are proposed to provide definition of the lateral and vertical extent of dissolved hydrocarbons Proposed well locations are illustrated on Figure 2 Based on the current known distribution of hydrocarbon-impacted ground water,AGE proposes the installation of ground water monitoring wells at the following locations • One well approximately 65 feet east of monitoring well MW-5 to monitor HU1, • One well approximately 50 feet southeast of monitoring well MW-11B to monitor HU2, • One well approximately 80 feet east-southeast of monitoring well MW-8B to monitor HU2, • One well approximately 65 feet north of monitoring well MW-8B to monitor HU2, and Advanced GeoEnveron mental,Inc