SITE INFORMATION AND CORRESPONDENCE

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0 Executive Summary mu PACIFIC CAR WASH 4405 Pacific Avenue, Stockton, California The Pacific Car Wash(PC )is located at 4405 Pacific Avenue,Stockton,California;the PCW has operated a full service car m ash and retail gasoline dispensing facility at the site since approximately 1968. In February 1999,three gasc line underground storage tanks(USTs)were removed from the site under the supervision of the San Joaquin County Environmental Health Department (SJCEHD). During removal of the USTs, sign ficant gasoline-impacted soil was encountered beneath the former UST locations. Thereafter, the SJCEHD issued a directive to the PCW site to investigate the full extent of gasoline impact. As a result,multiple investigative phases were conducted at the PCW site between 1999 and 2007. Based on the investigation results,it was determined that approximately 10,500 gallons of gasoline leaked to the subsurface. In a letter dated 29 May 2009,the SJCEHD determined that the extent of gasoline impact had been adequately assessed,and required that a Corrective Action Plan(CAP)be prepared for the site to mitigate gasoline impacted soil and ground water. By 22 April 2010, a CAP was approved by the SJCEHD. The CAP recommended treatment of subsurface gasoline-impacted soil utilizing a Soil Vapor Extraction (SVE) technology. The SVE technology would consist of vacuum equipment to extract subsurface gasoline vapor,and a burner for above ground treatment. The CAP also recommended treatment of gasoline-impacted ground water utilizing a Pump-And-Treat (P&T) technology. The P&T technology would consist of extracting impacted ground water through on-site wells,and pumping the ground water through an on-site ground water treatment process.Once treated,the ground water would be discharged into the sanitary sewer system. By 13 August 2010,details of the CAP were approved by the SJCEHD in a Remedial Action Plan (RAP). Based on the RAP,all hydrocarbon recovery operations were to be conducted underground via piping and remediation wells; additionally, all extracted gasoline hydrocarbons were to be treated under permit by the San Joaquin County Air Pollution Control District or by the City of Stockton Municipal Utilities District.Operation of the proposed SVE and ground water remediation system will not affect the public's interest in any way. Based on the results of subsurface investigation at the PCW site, a remediation period of 24 to 36 months is estimated for this site. At the conclusion of remediation period, the PCW will seek to obtain a `No Further Action' letter from the SJCEHD, and plans to continue operation as a full service car wash and retail gasoline dispensing facility.