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0 <br />I I <br />GRA l Lt4N ENVIRONMENTAL ME r 1 AL CONSULTING SERVICES <br />October 16, 2003 <br />022-370 <br />Mr. Michael Walton <br />Walton Engineering, Inc. <br />P.O. Box 1025 <br />West Sacramento, California 95691 <br />1 Subject: <br />fl <br />0 <br />u <br />�I <br />C <br />Underground Storage Tank and Fuel Dispenser Removal Report <br />Bonfire Market, 15 Grant Line Road, Tracy, California <br />Dear Mr. Walton: <br />ENVIRORN1ENT HEALTH <br />PERMIT/SERVICES <br />At your request, a registered geologist from Grayland Environmental (Grayland) arrived at Bonfare <br />Market (site) located at 15 Grant Line Road in Tracy, California, on September 12, 2003, to assist <br />with the removal of one underground storage tank and with fuel dispenser and product line <br />replacement work. The storage tank removal and underground fuel system renovation work was <br />conducted by Walton Engineering, Inc., of West Sacramento, California. The purpose of our work <br />was to evaluate the possibility that soil beneath an underground waste oil storage tank and beneath <br />five former gasoline dispensers, including four underground product line locations, had become <br />contaminated with petroleum-based fuel hydrocarbons, as a result of the operation of the <br />underground storage tank and/or fuel dispensing system at the site. The objective of our work was <br />to collect a soil sample from beneath the former underground storage tank, each fuel dispenser and <br />product line location for chemical analysis at an environmental laboratory. The soil sample collection <br />work was directed and supervised by an Environmental Health Specialist from San Joaquin County <br />Environmental Health Department (SJCEHD). <br />SITE DESCRIPTION <br />The site was situated at the northeastern corner of Holly Drive and Grant Line Road in Tracy, <br />California (Figure 1). At the time of our subsurface soil investigation, the site was occupied by <br />Bonfire Market, an active fuel dispensing station and convenience store. The approximate 2,400 - <br />square -foot, concrete building at the site, was situated near the northern end of the site (Figure 2). <br />Site operations included the use of three underground gasoline storage tanks, which at the time of <br />our investigation, were partially exposed for system renovation; and one underground waste oil <br />' storage tank, which was unearthed and prepared for removal (Tl on Figure 2). The single concrete <br />fuel dispenser island contained five dispensers and was situated sub -parallel to Grant Line Road near <br />the southern end of the site (Figure 2). The surface of the site was covered predominantly with <br />asphaltic -concrete, while the partially removed storage tank pad and drive slab surrounding the fuel <br />dispenser island were made of concrete. <br />n <br />11 <br />1807 Valdora Street Davis, California 95616 (530) 756-1441 <br />Grayland 022-370.fdr 1 October 16, 2003 <br />