SITE INFORMATION AND CORRESPONDENCE

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Purpose: This Site Specific Health and Safety Plan (HASP) is designed to identify, evaluate, and control safety and * hazards and provide directions for*gency response. Site History Site description: The Mountain House Development is located in an agricultural area northwest of the City of Tracy in San Joaquin County, California. Locally, the Mountain House study area is situated at elevations ranging from approximately 40 to 50 feet above mean sea level (MSL) in relatively flat-laying areas. It is associated with the former Standard Oil of California (Standard) Wait-Mendota-Richmond Pipeline and Tidewater Associated Oil Company (TAOC) Pipeline (collectively referred hereinafter as OVP). From the early 1900s to the 1960s the OVP was operated by Standard, predecessor of ChevronTexaco, to transport San Joaquin Valley crude oil and Bunker C locomotive fuel from Bakersfield to Standard's refinery in Richmond, California. The TAOC pipeline system was constructed in 1907 and operated until the 1970s, and carried heated crude oil and Bunker C fuel. In 2001, Condor Earth Technologies, Inc. (Condor) conducted an extensive environmental investigation approximately 14,000 feet in length, adjacent to Byron Road along the former OVP right of way (ROW). Condor's investigation identified six sites where residual petroleum had affected soil and groundwater, requiring further investigation. Mountain House Site #6 was identified as one of six sites needing further investigation; it is located approximately 700 feet northwest of the intersection of Byron Road and Wicklund Road, northwest of the City of Tracy. Site #6 encompasses an approximate length of 1,000 feet of former OVP ROW. The site is located on West Byron Road, north west of Wicklund Road. Field activities will be conducted in the Union Pacific Rail Road (UPRR) ROW (north east of West Byron Road), in the West Byron Road ROW (on either side), and on private property (north east and south west of West Byron Road). An encroachment permit is needed from the Mountain House Community Service District to alter/close traffic to these areas. In accordance with the encroachment permit, work will be performed 7 am to 5 pm, Monday. Traffic control will be provided during field activities conducted in the West Byron Road ROW. Scope of work to be performed by SAIC and subcontractors: A total of 27 primary and four contingency borings will be installed on the Mountain House Development Site #6. Borings will be cleared to a depth of B feet using a hand auger or other low impact device. Borings will then be advanced to a target depth of 20 to 40 feet below ground surface (bgs) using GeoProbe® direct-push equipment. The borings will be continuously cored and field screened using a photo-ionization detector (PID) to detect the presence of residual petroleum in soil. All down-hole equipment will be cleaned using a LiquinoxOlwater solution to prevent cross-contamination. If groundwater is encountered, a grab groundwater sample will be collected, unless SPH or sheen is observed. If SPH or sheen is observed, a groundwater sample will typically be collected from other, step-out borings in adjacent areas. However, if affected soil is observed at 5 feet bgs or above, and is separated from groundwater by an interval of unaffected soil by more than 10 feet, then a groundwater sample should be collected for laboratory analysis. SAIC will submit soil boring permit applications to San Joaquin County Environmental Health Department (SJCEHD) and encroachment permit applications to the Mountain House Community Services District (MHCSD) for borings located in the Byron Road ROW. While marking boring locations, potential safety concerns and obstacles to the proposed scope of work will be observed and noted, such as overhead lines, marked and unmarked underground lines, and pedestrians and automobile traffic. Underground Service Alert (USA) will be notified of all proposed boring locations at least 48 hours prior to any field activities. All USA ticket alerts will be confirmed and cleared prior to any intrusive field activities. In addition, SAIC will subcontract Cruz Brothers Locators to clear the proposed boring locations for underground utilities. All investigation-derived waste will be placed in Department of Transportation (DOT) approved, 55- gallon drums that will be properly labeled and stored pending disposal by CEMC's approved contractor, Sturgeon & Son Inc. As needed, a composite soil sample of the waste will be collected and submitted to a laboratory for waste profiling. 6 SAIC