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Mr. Don O. Culbertson Proposal P95-060.56 <br /> June 29, 1995 <br /> Page 2 <br /> 8270 and for metals. Only two constituents (2-Methylnaphthalene and Phenanthrene) <br /> were detected in the soil sample analyzed by method 8270. According to the Raney <br /> report, detected metal concentrations were within normal background concentrations. <br /> Soils samples submitted for EPA method 8015m ranged between nondetect in several of <br /> the samples to 330 milligrams/kilogram (mg/kg) in the sample designated S24 collected <br /> from Area 7. The results of the soil sampling program conducted by Raney are <br /> summarized in Tables 1 and 2. <br /> Follow-up work was performed on May 22, 1995 in areas where the results of soil <br /> sampling indicated that initial excavations had not removed the bulk of impacted soils <br /> (Figure 3). This work was performed to remove additional impacted soils in these areas <br /> and to collect additional soil samples. With the exception of Areas 2 and 4, soil samples <br /> collected from the bottom and sidewalls of the excavations completed during this round <br /> of sampling contained no detectable concentrations of petroleum hydrocarbons as <br /> identified by EPA method 8015m. <br /> On May 24 1995, additional soil was removed from Areas 2 and 4 (Figure 4). Area 2 <br /> was excavated to a depth of 12 feet, and a soil sample was collected from the bottom of <br /> excavation. Area 4 was excavated to the limit of the backhoe's capability at <br /> approximately 24 feet below grade (bg), and soil samples were collected from the <br /> sidewalls and the bottom of the excavation for chemical analysis. Groundwater was <br /> encountered in this excavation at a depth of approximately 24 feet. The results of the soil <br /> analyses indicated a concentration of petroleum hydrocarbons of 1 mg/kg in the sample <br /> collected from Area 2 at 12 feet bg. The results of chemical analysis of the soil sample <br /> collected from Area 4 at 24 feet bg indicated significant concentrations of petroleum <br /> hydrocarbons (6,150 mg/kg, C,-C32). <br /> SCOPE OF WORK <br /> EMCON's approach to this project is divided into five tasks which are described in this <br /> section. <br /> Task 1 Pre-field Activities <br /> Before field activities begin, EMCON will arrange for the field equipment needed for the <br /> soil and shallow groundwater sampling program. EMCON will contact Underground <br /> Services Alert and contract an underground utilities locating service to clear sampling <br /> locations. Appropriate permits will be obtained before initiating any field work. If CPL <br /> encounters significant difficulty gaining access to locations northeast of the site, EMCON <br /> FRE/H\wp\proposaTP9506056.wp5-95 gtf:l <br />