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• 2 0 SOIL EXCAVATION <br /> 21 Excavation and Segregation of Impacted Soil <br /> The soil to three locations within the SSA site were known or suspected to contain <br /> petroleum hydrocarbons. These have been identified as the north and south pits (former UST <br /> locations), and the former diesel fuel dispenser island area. The activities conducted at these <br /> locations are described in the following sections. <br /> 2.1.1 Excavation of Former Underground Storage Tank Locations <br /> In January 1993, MARK conducted soil excavation at the north and south pits. Soil was <br /> excavated using a Catapillar EL 200B excavator and segregated into two stockpiles One pile <br /> contained impacted soil for treatment and the second pile contained clean soil for possible use <br /> as backfill. Each pile was underlain and covered with industrial 6-mil plastic sheeting. Soil <br /> �? segregation was accomplished by field screening and confirmation sampling and analysis Field <br /> monitoring procedures used to segregate the soil are described in Section 2 3. Details regarding <br /> construction of the soil treatment pile are discussed in Section 3 1 <br /> A combined total of approximately 1,400 cubic yards (cy) In place volume of soil was <br /> removed from the two excavations The final dimensions of the north excavation were <br /> approximately 25 feet (ft) x 40 ft x 33 ft deep and the south excavation dimensions were <br /> approximately 20 ft x 15 ft x 12 ft deep Approximately 1,000 cy bulk volume of impacted soil <br /> was segregated for remediation The remaining 400 cy of soil was used as backfill material The <br /> pit locations are shown in Drawing 1-2 <br /> FASCLOSE 2 2-1 92-1177102 36 <br />