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16 February 1999 <br /> AGE-NC Project No. 98-0534 <br /> Page 5 of 7 <br /> Each of these tasks is described in greater detail below. <br /> 3.1. PRE-FIELD WORK ACTIVITIES <br /> A health and safety plan will be prepared in accordance with Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities(National Institute for Occupational Safety <br /> and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization,the area of excavation will be clearly marked and an utility clearance obtained <br /> through Underground Service Alert. <br /> 3.2. SOIL EXCAVATION <br /> Prior to backfilling and grading of the site, contaminated soil was detected in two location away <br /> from the excavation of the USTs. Soil will be removal and stockpiled for transported to a licensed <br /> landfill facility for disposal or on-site treatment. <br /> Based upon laboratory results of soil samples collected and analyzed, additional impacted soil will <br /> also be removed from the dispenser area and product line area and stockpiled for transport and <br /> disposal or treatment. Soil will be excavated to a maximum depth of 15 feet below surface grade <br /> (bsg) in the dispenser area and to 15 feet bsg in the product line area. The total volume anticipated <br /> for removal is estimated to be 100 tons (approximately 65 cubic yards). <br /> During excavation activities, excavated soil will be screened for volatile organic compounds using <br /> an organic vapor monitor (OVM). Excavated soil that appears visibly stained or has a petroleum <br /> hydrocarbon odor will be considered impacted. The OVM monitoring,along with filed observations <br /> will direct and limit the excavation extent. <br /> 3.3. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> A total of five soil samples will be collected from each of the excavations and will be submitted for <br /> laboratory analysis. Following State of California Regional Water Quality Board, Tri-Regional <br /> Board recommendations, soil samples will be collected from the base and each side wall of the <br /> "new"excavation at a minimum interval of every 20 linear feet. Soil samples will be collected from <br /> the base of the excavation at a minimum of one sample for every 400 square feet of excavation area. <br /> Field procedures for collection of soil samples are presented in Section 4.2. <br /> Advanced GeoEnvironmtnlal,Inc. <br />