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20 October 1999 <br /> AGE-NC Project No. 99-0645 <br /> Page 3 of 5 <br /> • Pre-field work activities; <br /> • Soil excavation and backfilling; <br /> • Soil sample collection and analysis; (stockpile sample collection and analysis) <br /> • Soil disposal and; <br /> • Report preparation. <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 /> For the reduction of MTBE and hydrocarbon impacted soil in the former UST excavation, <br /> contaminated soil in UST excavation will be excavated, sampled and transported to a licensed <br /> landfill facility for disposal. Based upon laboratory results of soil samples collected during removal <br /> procedures, an additional 350 yards of impacted soil will also be removed from the floor of the <br /> excavation and side wall of the former UST excavation and transported for disposal. Soil will be <br /> excavated to a minium depth of 15 feet below surface grade (bsg). The total volume anticipated for <br /> removal and disposal is estimated to be approximately 350 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. <br /> 3.3. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> A total of up 10 soil samples will be collected from the excavation will be submitted for laboratory <br /> analysis. Following State•of California Regional Water Quality Board, Tri-Regional Board <br /> recommendations, soil samples will be collected from the base and each side wall of the "new" <br /> excavation at a minimum interval of every 20 linear feet. Soil samples will be collected from the <br /> Advanced GeoEnvironmental,Inc. <br />