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26 April 1999 <br /> AGE-NC Project No. 99-0592 <br /> Page 3 of 5 <br /> investigation is needed to delineate vertical and horizontal petroleum hydrocarbon-impact at the site. <br /> Assessment activities will consist of the following tasks: <br /> • Permitting and pre-field work activities; <br /> • Soil sample collection and analysis; <br /> • Ground water grab samples and analysis, if encountered; and <br /> • Report preparation. <br /> 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable site assessment permits will be obtained from the San Joaquin County PHS-EHD; a <br /> health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance <br /> Manual for 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 to <br /> mobilization, each boring location will be clearly marked and an utility clearance obtained through <br /> Underground Service Alert. <br /> 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> Initially,AGE proposes to advance five borings at the site to evaluate the lateral and vertical extent <br /> of petroleum hydrocarbon impact. Additional borings may be required to completely delineate any <br /> impacted soil encountered. Proposed soil boring locations are illustrated in Figure 2. <br /> Based on soil contamination encountered beneath the former USTs and dispensers, AGE proposes <br /> advancement of borings in the following locations: <br /> • Approximately 5 to 10 feet east of former UST No. 1,and at the north end of the former UST <br /> No. 1 excavation; <br /> • Approximately 5 to 10 feet southwest of former UST No. 2; <br /> • Approximately 5 to 10 feet west of former UST No. 3; and <br /> • Approximately 5 to 10 feet northwest of former UST No. 4. <br /> Initially, each boring will be advanced to 30 feet bsg; total depths of soil borings will be based on <br /> field observations and field screening using an organic vapor monitor(OVM). However, AGE will <br /> be prepared to advance borings to depths of approximately 50 feet bsg or to ground water. Soil <br /> Advanced GeoEnvironmental,Inc. <br />