SITE INFORMATION AND CORRESPONDENCE

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'`r *4/ Executive Summary THREE B'S TRUCK PLAZA 14749 North Thornton Road, Lodi, California The Three B's Truck Plaza(TBT?) site is presently utilized as a commercial UnoCal gasoline and diesel refueling station;the site has been utilized for commercial fueling since approximately 198 1. The site is situated approximately 300 feet south of the intersection of Thornton Road and California State Highway 12 (Kettleman Road), Lodi, San Joaquin County, California. In October 1998, one 10,000-gallon gasoline underground storage tank (UST) and three 12,000- gallon diesel USTs were removed from the site. During removal of the above USTs, petroleum- impacted(i.e.gasoline and diesel)soil and ground water were encountered at the site.As a result of the impacted soil and ground water, the San Joaquin County Environmental Health Department (SJCEHD) issued a directive to investigate the full extent of petroleum contamination for this site. Based on the above SJCEHD directive, a subsurface investigation was performed at the TBTP site between 1998 and 2006; the investigation included drilling of eighteen (18) soil borings for evaluating soil conditions and installing seventeen(17)ground water monitoring wells for evaluating ground water conditions. Based on the investigation results, approximately 9,000 gallons of gasoline/diesel was is estimated to have leaked to the subsurface.An estimated 60,000 cubic yards of soil has been impacted. Due to the extent of petroleum-impacted soil and ground water at the site, the SJCEHD directed preparation of a Corrective Action Plan(CAP)to mitigate petroleum-impacted soil and ground water for this site.As part of the CAP,soil and ground water remediation feasibility testing was conducted at the site in November 2006(performance of a soil vapor extraction[SVE] and in-situ air sparging [IAS]pilot test). Based on the November 2006 pilot test results, SVE and IAS were determined to be effective remediation options for this site. A Remedial Action Work Plan (RAWP) was then prepared detailing the design of the remediation systems. In July 2007, a RAWP was submitted to the SJCEHD for approval.The RAWP proposes utilizing a 500-CFM thermal oxidizer SVE system to extract soil-gas vapor from the vadose zone. The IAS system will utilize a 10-HP air compressor to sparge air beneath the ground water table,producing air channels that strip dissolved contaminants from the ground water. At the site, a remediation period of 36 to 48 months is estimated. All hydrocarbon recovery operations will be conducted underground via piping and remediation wells;additionally,all extracted hydrocarbons will be completely treated through a thermal oxidizer and under permit by the San Joaquin County Air Pollution Control District. Operation of the proposed SVE and IAS remediation system should not affect any public interest in any way.At the conclusion of corrective action,the TBTP site hopes to satisfy the California Water Quality Goals, and will seek to obtain a `No Further Action' letter from the California Regional Water Quality Control Board.