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1 <br /> n _ EDMUND G.BROWN JR. <br /> GOVERNOR <br /> CAL1�011MIA <br /> WaterBoards SMATTHEW ECRETARY ORDRIOUEZ <br /> ENVIRONMENTAL PROTECTION <br /> State Water Resources Control Board <br /> UST CASE CLOSURE REVIEW SUMMARY REPORT <br /> Agency Information <br /> Agency Name: San Joaquin County Address: 1868 East Hazelton Avenue <br /> Environmental Health Stockton, CA 95205 <br /> Department (Count <br /> Agency Caseworker: Vicki McCartney Case No.: 1039 <br /> Case Information <br /> USTCF Claim No.: 5820 GeoTracker Global ID: T0607700391 <br /> Site Name: Chevron #9-0557 Site Address: 139 Center Street South <br /> Stockton, CA 95201 <br /> Responsible Party: Chevron Environmental Address: 6101 Bollinger Canyon Rd <br /> Management San Ramon, CA 94583 <br /> Attn: Joe Watterson <br /> USTCF Expenditures to Date: $1,082,501 Number of Years Case Open: 23 <br /> URL: http://qeotracker-waterboards.ca.gov/profile reportasp?global id T0607700391 <br /> Summary <br /> The Low-Threat Underground Storage Tank (UST) Case Closure Policy (Policy) contains general <br /> and media-specific criteria, and cases that meet those criteria are appropriate for closure pursuant <br /> to the Policy. This case meets all of the required criteria of the Policy. A summary evaluation of <br /> compliance with the Policy is shown in Attachment 1: Compliance with State Water Board <br /> Policies and State Law. The Conceptual Site Model upon which the evaluation of the case has <br /> been made is described in Attachment 2: Summary of Basic Case Information (Conceptual <br /> Site Model). Highlights of the case follow: <br /> The Site is currently a vacant lot in Stockton, California. An unauthorized release was reported in <br /> April 1990. Approximately 350 cubic yards of impacted soil were excavated and disposed offsite <br /> during the 2003 tank removal. Dual phase extraction pilot test was performed for four days in <br /> 2003, and 22 pounds of TPHg were removed. Approximately 15 pounds of ozone were sparged in <br /> a pilot test, which was determined not to be feasible. Since 1991, twenty-one groundwater <br /> monitoring wells have been installed (9 wells abandoned) and monitored. According to <br /> groundwater data, water quality objectives have been achieved or nearly achieved for all <br /> constituents except for TPHg, benzene, toluene, ethylbenzene, and xylene in source area wells <br /> MW-15d, and MW-182d. <br /> The petroleum release is limited to the soil and shallow groundwater. According to data available <br /> in GeoTracker, there are no supply wells regulated by the California Department of Public Health <br /> or surface water bodies within 1,000 feet of the defined plume boundary. No other water supply <br /> wells have been identified within 1,000 feet of the defined plume boundary in files reviewed. Water <br /> is provided to water users near the Site by the Stockton East Water District and California Water <br /> Service. <br /> F11 P..•1 A?Anl,,.;.G•I•n j TMOVA$HOWARD,tytCvrrvE otncCR <br /> 1001 t S:rn.;_Sac•amer:D.CA P5814 1 ht,pt.ng Acor._.ir P.O.©Gc 100.Sacramrr:O Ca 9$812.0100 1hA:•noa•ng ca qa. <br /> C"^- • ,I.,.., <br />