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y _ Y <br /> Map ID �� MAP FINDINGS T <br /> Direction <br /> Distance <br /> Distance(ft) EDR ID Number <br /> Elevation Site Database(s) EPA ID Number <br /> PG&E,STOCKTON (Continued) 5102008388 <br /> PG&E-STOCKTON <br /> PG&E PNA SITE-STOCKTON ' <br /> PG&E PNA SITE/STOCKTON <br /> PG&E/STOCKTON <br /> PG&E,STOCKTON <br /> All Street Addresses 530 SOUTH CENTER STREET <br /> STOCKTON CA 95203 <br /> CHURCH&CENTER STREETS <br /> STOCKTON CA 95203 ' <br /> Background The site was the location of a former gasification plant <br /> Residues and waste from the manufactured gas process were <br /> stored and disposed onsite In addition,petroleum used as <br /> a raw material leaked from onsite storage tanks <br /> Contaminants found onsite in soil and groundwater include <br /> polyaromabc hydrocarbons(PAH) total petroleum <br /> hydrocarbons(TPH) heavy metals benzene,toluene,xylene <br /> and ethylene <br /> The contaminants in soil are currently covered by a large <br /> paved area used for parking Residents in the area of the <br /> site use municipal water but may be impacted 0 contaminated <br /> groundwater migrates into municipal wells located within <br /> 2000 feet of the site PG&E completed a preliminary RI in <br /> April 1988 which confirmed the presence of contaminants in <br /> soil and groundwater <br /> Id Name BEP DATABASE PCODE <br /> Id Value P14058 <br /> Special Programs <br /> Program Name Not reported <br /> Program Code Not reported <br /> Comments <br /> Date 01/01/1991 <br /> Comment This is the date the site was first listed pursuant to <br /> section 25356 <br /> Date 0612811991 , <br /> Comment Enforcement Agreement issued to require completion of a RAP <br /> Date 06/30/1992 <br /> Comment Removal Action completed to eliminate exposure to <br /> contaminated soil along the HazeBon Avenue easment <br /> This sod has been characterized and capped with concrete <br /> Date 0611811997 <br /> Comment RIFS—Approval of the feasibility study completed to address ' <br /> PAH impacts to sod and groundwater Based on the Risk Assess- <br /> ment cleanup of soil is driven primarily by impacts to <br /> groundwater and not by exposure to human health The <br /> recommended alternative includes excavacation and removal of <br /> targeted sal intervals identified by modeling soils data <br /> and intrinsic remediation of a groundwater contaminant plume <br /> The selected alternative includes institutional controls, <br /> asphalt batching of hazardous waste aontarnmanted soil or <br /> Class II landfill disposal if not hazardous waste,and <br /> continued monitoring of groundwater for contaminants and <br /> intrinsic remediation parameters This alternative includes <br /> an enhancement component consisting of introducing oxygen <br /> releasing compounds to the watertable and a contingency ' <br /> measure to provide control of the plume if plume expansion <br /> TC514466 2s Page 62 <br />