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Quarterly Summary Report for The Pestana Trust Property 2360 East Street , Tracy, CA PHS/EHD Site Code: 1397 SITE DESCRIPTION AND HISTORY The site, presently unused, is that formerly occupied by (Dick) Reeve's Exxon Station- a 15 , 900 square foot , rectangular parcel located at the northwest corner of a moderate size, retail shopping center at East Street and Grant Line Road, in the City of Tracy (San Joaquin County) , California. The facility was operated as a retail service station from the early 1950s through 1991 Both gasoline and diesel fuel were sold. The building that housed the station office and service bays at the site remains , but is vacant . The parcel is presently surrounded by 6-foot high cyclone security fencing . Land use in the area surrounding the site is of a mixed commercial , residential , and light-industrial nature . • In its September, 1991 preliminary assessment of soil and groundwater contamination at the site, WaterWork Corp . of Escalon reported that extra unleaded gasoline, regular unleaded gasoline, and diesel fuel were each being dispensed from its own 5 , 500 gallon capacity underground storage tank. These tanks were located 3ust northeast of the station office. A 350 gallon underground waste oil storage tank was also present . This tank was located behind (to the east of) the office . During December of 1990 , the station's underground fuel storage tank systems were precision tested. The extra unleaded tank failed its test , and during January, 1991 , the tanks and product lines were retested using helium gas . During the test , the extra unleaded tank developed a leak and an estimated 300 gallons of product was released into the fuel tank pit . The leak was reported to the San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) and the tank was emptied of all remaining product on the same day. On April 11 and 12 , 1991 , all on-site underground storage tanks and product lines were removed. During the removal , WaterWork staff noted the presence of moderate product odor near the tank pit , staining near the fill -end of the diesel fuel tank and in the product line trenches , as well as product sheen on �� the groundwater standing in the bottom of the tank pit .