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Map ID <br />MAP FINDINGS <br />Direction <br />Distance <br />EDR ID Number <br />Elevation <br />Site <br />Database(s) EPA ID Number <br />STOCKTON MAINT STN (SHOP <br />10) (Continued) S104403359 <br />LUST: <br />Name: <br />STOCKTON MAINT STN (SHOP 10) <br />Address: <br />1603 B ST S <br />City,State,Zip: <br />STOCKTON, CA 95206 <br />Lead Agency: <br />SAN JOAQUIN COUNTY <br />Case Type: <br />LUST Cleanup Site <br />Geo Track: <br />http://geotracker.waterboards.ca.gov/profile_report.asp?global_id=T0607700099 <br />Global Id: <br />T0607700099 <br />Latitude: <br />37.9403012 <br />Longitude: <br />-121.2581114 <br />Status: <br />Completed - Case Closed <br />Status Date: <br />09/24/2010 <br />Case Worker: <br />Not reported <br />RB Case Number: <br />390135 <br />Local Agency: <br />Not reported <br />File Location: <br />Local Agency <br />Local Case Number: <br />1018 <br />Potential Media Affect: <br />Aquifer used for drinking water supply <br />Potential Contaminants of Concern: <br />Gasoline <br />Site History: <br />February 1989- Four underground storage tanks were removed from the <br />site. Soil samples for analysis were collected after removal of a <br />cement slab that was under the tanks. Laboratory reported petroleum <br />hydrocarbon impact to the samples. A waste oil tank was removed from <br />a different area of the site in March 1989; minor diesel impact to <br />the soil beneath the waste oil tank did not require further <br />investigation of that area. Between 1987-1996, 25 groundwater <br />monitoring wells were installed at the site to investigate the <br />verticle and lateral extent of the the petroleum hydrocarbon impact <br />to soil and groundwater at the site. The wells were installed in <br />different phases of work, as the groundwater elevation has fluctuated <br />greatly rendering the first set of wells unable to provide <br />groundwater to sample. December 2005- Remediation of the site was <br />initiated with the start up of a soil vapor extraction/air sparging <br />system. The consultant estimates that the SVE system has treated <br />greater than 27,000 pounds of volatile organic compounds since start <br />up; current daily average is approximately 4 pounds a day. The air <br />sparge component of the system was placed in operation in June 2006. <br />A rebound test of the system was conducted in 2007; no increase in <br />the extracted vapor concentrations was reported following re-starting <br />the system. May 2009- The consultant has shut down the system and is <br />preparing for site closure. March 2010- Notification was sent to the <br />RWQCB of the EHD's intent to close the site. August 2010- All site <br />wells were destroyed. September 2010- No Further Action letter sent <br />to Responsible Pary. <br />LUST: <br />Global Id: <br />T0607700099 <br />Contact Type: <br />Regional Board Caseworker <br />Contact Name: <br />Alan Buehler <br />Organization Name: <br />CENTRAL VALLEY RWQCB (REGION 5S) <br />Address: <br />11020 SUN CENTER DRIVE #200 <br />City: <br />RANCHO CORDOVA <br />Email: <br />alan.buehler@waterboards.ca.gov <br />Phone Number: <br />Not reported <br />LUST: <br />Global Id: <br />T0607700099 <br />TC6327721.2s Page 426 <br />