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"' 03 August 1999 S AGE-NC Project No 95-0121 Page 5 of 7 findings and recommendations 34 SIX MONTH OXYGEN RELEASE COMPOUND PILOT TEST AGE proposes to infect ORC Into the subsurface utilizing nine soil probe borings spaced equidistant from at least one ground water monitoring source area The bonngs will be located directly in the adsorbed petroleum hydrocarbon-impacted saturated soil plume at the site General lithology beneath the site is depicted in cross sectional view on Figure 3, the estimated extent of petroleum hydrocarbon-Impacted soil is depicted in cross sectional view A -A'in Figure 4 Proposed infection soil boring locations are Illustrated in Figure 2 _ Based on soil contamination encountered beneath the former area, AGE proposes advancement of probe borings in the following locations • Approximately 5 to 15 feet east of EW-1, • Approximately 5 to 15 feet east-northeast of EW-1, . • Approximately 5 to 15 feet north-northeast of EW-1, • Approximately 5 to 15 feet north-northwest of EW-1, Approximately 5 to 15 feet west-northwest of EW-1, • Approximately 5 to 15 feet west of EW-1, • Approximately 5 to 15 feet west-southwest of EW4, • Approximately 5 to 15 feet south of EW-1, and • Approximately 5 15 feet southeast of EW-1 Initially, each probe boring will be advanced to 40 feet bsg However, total depths of probe borings will be based on field observations and field screening using an orgaruc vapor monitor(OVM) Field procedures for advancement of borings and collection of soil samples are presented in Section 4 3 35 PREPARATION OF FEASIBILITY/REMEDIAL INVESTIGATION REPORT Upon completion of all three pilot studies,a feasibilityhemedial investigation report will be prepared presenting the findings of each pilot study The report will discuss feasibility and cost effectiveness of remedial alternatives Conclusions and applicable recommendations will be Included in the report • The report will be in' a format acceptable to the PHS-EHD and the RWQCB, and will be reviewed and signed by a California Registered Geologist Advanced GeoEnN ironmental,Inc