ARCHIVED REPORTS XR0008631 - Laserfiche WebLink

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REMEDIAL ACTION PLAN 1605 South EI Dorado Street Stocldon Cahfomia 6 Environmental Data Resources, Inc (EDR) of Southport, Connecticut performed a radius map report for Aegis on September 3, 1993 The EDR report mapped sites with potential or existing environmental liabilities within a 1-mile radius of the Exxon site by searching specified government databases This report is included as Appendix B Valley Lumber, located immediately upgradient of the site, is listed as storing hazardous materials However, no UST were reported on the site On October 11, 1993, Aegis personnel reviewed the SJCPHS/EHD underground storage tank files on surrounding properties Two neighboring sites have reported Underground Storage Tank Unauthorized Releases (Figure 1) The Stockton Unified School District has filed an unauthorized release report on behalf of Edison High School, located at 1425 South Center Street, northwest of the Exxon site (Figure 1) The report was filed based on soil samples collected from beneath two UST removed from the site in November 1990 a 500 gallon leaded gasoline UST and a 10,000 gallon diesel UST Center Street Parts (formerly Kilpatrick Bakery) at 1717 South Center Street has been cited for the abandonment or improper closure of a UST The 1000-gallon UST, located south of the Exxon site, was removed on December 6, 1990 Petroleum odors were noted in the excavation at a depth of eleven feet Both the Stockton Unified School District and Center Street Parts are required to perform an investigation to define the extent of hydrocarbon impact in soil and groundwater As of October 11 , 1993, neither property owner has submitted a report to the SJCPHSIEHD documenting such an investigation 4 0 REMEDIATION FEASIBILITY Remediation alternatives for this site have been considered during previous investigations Two vapor extraction wells (VEW-1 and VEW-2) were installed on tMay 3, 1993 Based on the pilot-scale soil vapor extraction test performed on May 12, 1993 (see section 4 3), this technology appears viable for remediation at this site The following sections include discussions of the remediation objective and suitability of vapor extraction to meet these objectives 4 1 Remediation Objective The overall objective of remediation at this site is to reduce the potential for degradation of the underlying groundwater and reduce future liabilities associated with the site To meet this objective, this RAP proposes soil vapor extraction to reduce the mass of petroleum hydrocarbons in soil and groundwater beneath the Exxon site 91 044A RAP 4 I