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30 August 2004 AGE-NC Project No 99-0592 Page 3 of 13 ' • 3732 Newton Road, resident, one well approximately 1,200 feet north from the site, • 3832 Newton Road - Conti Materials, one well 1,500 feet north from the site, I • 4102 Newton Road, resident, one well approximately 1,600 feet north from the site, and • 3432 and 3450 Cherokee Road, businesses, each had one well which are approximately I1,500 feet south of the site There is one San Joaquin County Well(30E1)located approximately 1,500 feet southwest ofthe site The wells proximity to the site poses a low environmental risk Two California Water Service Co pumping stations, STA 79(well 43E1) and STA 16 (well 43D2),are located approximately 3,000 feet east and southwest of the site The site poses no environmental risk to the stations, and the stations pose low significant influence to the ground water flow direction at the site Two neighboring sites, Delta Truck Sales, Inc at 3355 East Cherokee Road and Cherokee Truck Stop at 3535 East Cherokee Road have nine monitoring wells A ground water monitoring investigation is currently being performed at Cherokee Truck Stop Five monitoring wells were" • installed between 1990 and 1996 Additional monitoring wells were installed in 1999 The site utilizes two septic systems, one is located approximately 90 feet east of the former UST system, the second system is located toward the front of the property, near the office building, approximately 250 feet west of the former UST system Cherokee Truck Stop, 3535 East Cherokee Road, utilizes a septic system located approximately 250 feet southeast of the former UST system A fourth septic system is located approximately 1,500 feet south of the site, at the corner of Newton Road and East Cherokee Road in a vacant lot adjacent to Carl's Restaurant I In December 2000, domestic well DW-2 was abandoned under EHD directive DW-2 had been out of service since 1978 due to sand infiltration issues This made the well a potential conduit for contamination, requiring destruction Before destruction, a ground water sample was collected on 12 December to determine if contaminants were present in the well and a well video survey was conducted on 13 December since records could not be found regarding well construction details or installation date The ground water sample results showed detections of total petroleum I hydrocarbons qualified as diesel(TPH-d),toluene and xylenes at concentrations of 280µg11, 1 0µg/1 and 1 1 gg/l, respectively Results are shown in Tables 1 and 2 The survey found that the well was constructed using six-inch diameter non-perforated steel casing extended to a depth of approximately 110 feet bsg Water entered the well through an open hole at the bottom of the casing The actual end of the casing was not located due to poor visibility caused by heavy floating bacteria and I incrustation Static water level in the well was determined to be 59 feet bsg Total depth of the well was approximately 120 feet bsg On 16 December DW-2 was destroyed utilizing blast perforation . and casing ripping techniques Explosive charges and projectiles(chrome-alloy steel round bullets) ' Advanced GeoEnvironmental,Inc I