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EDMUND G.BROWN JR. y MERNOR •...ORN,• MATTHEW RooRiouez Water Boards M1ROxMENI4 VROIECrgx State Water Resources Control Board REVIEW SUMMARY REPORT—CLOSURE FIFTH REVIEW—DECEMBER 2014 Agency Information Agency Name: San Joaquin County Address: 1868 East Hazelton Avenue Environmental Health Stockton, CA 95205 Department Count Agency Caseworker: Angelica Sandoval Marin Case No.: 1703 Case Information _ USTCF Claim No.: 1129 GeoTracker Global ID: T0607700234 Site Name: Gillies Truck Site Address: 3931 Newton Road Stockton, CA 95205 Responsible Party: James Gillies Address: Private Address USTCF Expenditures to Date: $496,235 Number of Years Case Open: 25 To view all public documents for this case available on GeoTracker use the following URL: http://aeotracker.waterboards.ca.gov/profile report.asp?global id=T0607700234 Summary The Low-Threat Underground Storage Tank(UST) Case Closure Policy(Policy) contains general and media-specific criteria, and cases that meet those criteria are appropriate for closure pursuant to the Policy. This case meets all of the required criteria of the Policy. Highlights of the case follow: This Site is an active commercial petroleum fueling facility. An unauthorized release was reported in November 1988 following the removal of two USTs (one gasoline, one diesel). Several thousand cubic yards of impacted soil were excavated to 30 feet below ground surface (bgs) and disposed offsite in July 1990. Soil vapor extraction was conducted briefly in September 2010. The rate of total petroleum hydrocarbons as gasoline (TPHg) removal was 27 pounds per day. Active remediation has not been conducted at the Site for the past four years. Since 1994, 27 groundwater monitoring wells have been installed and monitored. According to groundwater data, water quality objectives have been achieved or nearly achieved for all constituents except total petroleum hydrocarbons as diesel (TPHd). The petroleum release is limited to the soil and shallow groundwater. According to data available in GeoTracker, there is one public water supply wells approximately 750 feet east (downgradient)of the projected plume boundary. No other water supply wells or surface water bodies have been identified within 1,000 feet of the projected plume boundary in files reviewed. The unauthorized release is located within the service area of a public water system, as defined in the Policy. The affected shallow groundwater is not currently being used as a source of drinking water, and it is highly unlikely that the affected shallow groundwater will be used as a source of drinking water in the foreseeable future. Other designated beneficial uses of the affected shallow groundwater are not threatened, and it is highly unlikely that they will be, FFi.CIA MARCUS, CXAIR I THOMAS HOWARD,EXECUTIVE DIRECTOR 1001 1 Streel,Sacramento.CA 95814 1 Mailm9 Address P.O.Box 100,Sacramento,Ca 95812.0100 1 wW W.waterboards.cagov Ci REcxc.EO nRRA