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CVE# D17124 Remedial Action PlanPage 3 Westside Market, 729 N. Central Ave., Tracy, California :SEelenlum ND 0.50 ND 0. 50 ND 0.50 43 0.50 150 5.0 mg/kg (ppm) = milligrams per kilogram (parts per million) TPH-g = total petroleum hydrocarbons as gasoline BTPS( = benzene, toluene, ethylbenzene, and total xylenes TPH-d = total petroleum hydrocarbons as diesel TPH-mo = total petroleum hydrocarbons as motor oil No = not detected at or above the R.L. VOCs = volatile organic compounds SVOCs = semi-volatile organic compounds * = please refer to attached analytical report for complete list of Reporting Limits According to laboratory results, trace concentrations of diesel and motor oil-range hydrocarbons were detected in the soil sample. No gasoline-range hydrocarbons, grease, PCBs, VOCs, or SVOCs were detected . With the exception of an elevated total lead concentration, metals concentrations appeared to be consistent with naturally occurring concentrations. PROJECT OBJECTIVE AND SCOPE The objective of this project is to conduct a Remedial Action involving excavation of hydrocarbon- impacted soil in the area of former USTs. It is proposed that hydrocarbon-impacted soils be excavated to meet the requirements for closure criteria contained in the State Water Resources Control Board's Low- Threat Underground Tank Case Closure Policy. The scope of services proposed for this remedial action is as follows: Using an excavator, hydrocarbon-impacted soils around and beneath the former UST locations would be excavated. When field indications suggest that impacted soils have been removed , up to five (5) confirmation soil samples will be collected from the excavation's bottom and sidewalls. Two sidewall samples will be collected at a depth approximately five feet below surface grade and the other two sidewall samples will be collected at a depth approximately 10 feet below surface grade. The remaining confirmation sample will be collected from the bottom of the excavation , presumably at a depth no greater than 20 feet. Confirmation samples will be analyzed for the presence and concentration of total lead by EPA Method 6020. Excavation activities will be considered complete when analytical results of the confirmation samples meet the following conditions: o combined TPH concentrations are less than 100 mg/kg , o benzene, ethylbenzene and naphthalene concentrations in the upper 5 feet are no greater than 1 .9, 21 mg/kg and 9.7 mg/kg , respectively, o benzene, ethylbenzene and naphthalene concentrations between 5 and 10 feet are no greater than 2 .8, 32 mg/kg and 9 .7 mg/kg , respectively, I �I