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Map ID MAP FINDINGS <br /> Direction <br /> Distance EDR ID Number <br /> Elevation Site Database(s) EPA ID Number <br /> STOCKTON MAINT STN(SHOP 10) (Continued) S104403359 <br /> LUST: <br /> Name: STOCKTON MAINT STN(SHOP 10) <br /> Address: 1603 B ST S <br /> City,State,Zip: STOCKTON,CA 95206 <br /> Lead Agency: SAN JOAQUIN COUNTY <br /> Case Type: LUST Cleanup Site <br /> Geo Track: http://geotracker.waterboards.ca.gov/profile_report.asp?global_id=T0607700099 <br /> Global Id: T0607700099 <br /> Latitude: 37.9403012 <br /> Longitude: -121.2581114 <br /> Status: Completed-Case Closed <br /> Status Date: 09/24/2010 <br /> Case Worker: Not reported <br /> RB Case Number: 390135 <br /> Local Agency: Not reported <br /> File Location: Local Agency <br /> Local Case Number: 1018 <br /> Potential Media Affect: Aquifer used for drinking water supply <br /> Potential Contaminants of Concern: Gasoline <br /> Site History: 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: T0607700099 <br /> Contact Type: Regional Board Caseworker <br /> Contact Name: Alan Buehler <br /> Organization Name: CENTRAL VALLEY RWQCB(REGION 5S) <br /> Address: 11020 SUN CENTER DRIVE#200 <br /> City: RANCHO CORDOVA <br /> Email: alan.buehler@waterboards.ca.gov <br /> Phone Number: Not reported <br /> LUST: <br /> Global Id: T0607700099 <br /> TC6327721.2s Page 426 <br />