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Chevron Products Company 6 Former Chevron Station 9-5775, 301 W Kettleman Lane, Lodi, CA July 24,2000 • Stockpiled Soil Soil cuttings generated during drilling activities were stored on site and covered with a plastic sheet Soil stockpile analytical results are presented in Table 4 Water generated during steam cleaning of augers and development of wells was temporarily stored on site in DOT -approved 55 -gallon drums On June 26, 2000, Integrated Waste Management (IWM) transported the soil stockpile, approximately 13 cubic yards, and 29 55 -gallon drums to an appropriate disposal facility (Attachment 1) Well Search A sensitive receptor survey consisting of door-to-door field reconnaissance was performed to identify domestic and municipal wells within a 1 -block radius of the site (Figure 9) The search was conducted at the request of SJCEHD in a letter dated April 14, 2000 Verbal and written details regarding the radius of the search were received on May 3 and July 20, 2000, respectively (Attachment J) The results of the survey are provided below Door -to -Door Well Survey A door-to-door sensitive receptor survey was performed within a 1 -block radius of the Chevron facility on July 12 and 13, 2000 by a SECOR representative to identify domestic wells not listed in agency databases A total of two businesses and ninety-five residences were approached . during the sensitive receptor survey In fifty-five of the residences, the occupants were not home at the time of the survey At these locations, an envelope was placed in the doorway containing a blank Water Supply Well Location Survey Form, explanation letter, and a self addressed and stamped envelope As of July 20, 2000, four of the residences responded to the survey by mail n �J The field survey dad not identify domestic water wells within a 1 -block radius of the subject site Field notes and signed copies of the Water Supply Well Location Survey Forms used during the survey are included In Attachment K EXTENT OF PETROLEUM HYDROCARBON IMPACTS The extent of petroleum hydrocarbon impacts an soil and groundwater is discussed below Extent of Petroleum Hydrocarbons in Soil Maximum concentrations of hydrocarbons and fuel oxygenates in soil are located in the vicinity of the former USTs adjacent to extraction well EX -1 and vapor extraction wells VE -1 through VE -4 The vertical extent of TPHg, BTEX, and MtBE in the area of the former USTs extends to approximately 65 feet bgs as indicated from analytical results from EX -1, VE -1 through VE - 077 41991 04319-5775PAR doe