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• 1.0 EXECUTIVE SUMMARY Six underground storage tanks(USTs)were in service as a gasoline retail sales effort at 521 North Cherokee Lane under at least several ownerships from the mrd-1950's to 1983 This site has been known with numerous operating names but is most recently operated as"Parmar Texaco" The site is currently owned by Mr Jose Garcia The last known operator of record (Ramcon)removed the UST's under the oversight of San Joaquin County Public Health Systems Environmental Health Department(PHSEHD)on February 5, 1988 The soil beneath the USTs appeared to have significant petroleum hydrocarbon contamination as evidenced by discoloration of the soil and strong petroleum hydrocarbon odors A single soil sample was collected from the bottom of the tank pit that was submitted to a state of California analytical laboratory This soil sample was reported to contain 1,300 mg/kg of Total Petroleum Hydrocarbons A minor over excavation of 100 cubic yards of obviously impacted petroleum hydrocarbon soil was reportedly removed from the tank pit during this time in order to allow a deeper soil sample to be collected This sample reportedly was collected from a depth of 27 feet bgs and reportedly was submitted to an analytical laboratory where petroleum hydrocarbon concentrations were below analytical method detection limits No analytical laboratory report or map of where this sample was collected were found in the site records A series of site assessment investigations have been conducted at the site to date and have consisted of the following installation and monitoring of monitoring wells drilled and completed to 60 feet bgs,(2)drilling and sampling from four soil borings to 45 feet bgs,(3)sporadic monitoring of the wells,and(4)installation and sampling of groundwater from 14 hydropunch borings installed to the water table at about 50 feet bgs In addition, several thousand gallons of petroleum hydrocarbon contaminated groundwater were removed from the site by pumping the monitoring wells in 1991 by Falcon Energy The site has been admitted into the State of California Underground Storage Tank Cleanup Fund(Fund)and the current owner has been assigned all Fund rights as of January, 2003 Additional site assessment work was started in April, 2003 when quarterly groundwater monitoring was initiated A workplan to complete a site assessment investigation was submitted to PHSEHD and approved for execution in April, 2003 The site assessment work completed in 2003 has included the following MamW IFnvuv=enW\ParmuTexaco\Re rts1SAR1203 Page 1 po wpd ag