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I ,I <br /> DEPTH TO GROUNDWATER- <br /> According to maps published by the San Joaquin County flood <br /> Control District, the water table in this area is about 20 ' below <br /> ' ground level This data correlates well with the water depth <br /> reported during the removal of the tanks- The transmissivity of <br /> the aquifer in this area is not known, but it is possible that <br /> ' tidal fluctuations may influence water levels <br /> PRIOR USE OF UST' S <br /> ' The tanks were used to fuel company and personal vehicles for <br /> business purposes. They were installed in June, 1974, and were <br /> taken out of service in June, 1994, when they were removed <br /> There are no accurate records concerning fuel usage, and inven- <br /> tory tracking reconcilliation was not performed <br /> LOCATION OF NEARBY WELLS <br /> According to verbal communication with Margaret Lagorio of the <br /> San Joaquin County EHD, there are no domestic, private, or <br /> groundwater monitoring wells within the zone of influence of this <br /> site <br /> DETAILS OF TANK REMOVAL <br /> On June 8, 1994, Thorpe Oil Co removed two (2) 1 , 000 gallon <br /> UST' s which had been used for storing & dispensing unleaded <br /> ' gasoline Refer to EXHIBIT C for a copy of the Application for <br /> Tank Removal & Site Closure There was a strong petroleum odor <br /> noted during excavation & removal of the tanks, and apparent soil <br /> ' discoloration The piping from the tanks to the dispensing pump <br /> was removed, as well as the pump No odors or discoloration were <br /> noted in those areas. The removal of the tanks was witnessed by <br /> ' Pamela Violett of the San Joaquin County EHD. Soil samples were <br /> taken from the backhoe bucket by Fred Sav, an employee of Geo- <br /> Analytical laboratory, as directed by the County representative <br /> PLATE IV shows the locations of those samples The results of <br /> ' the laboratory analyzes are listed on TABLE 1 , copies of the <br /> laboratory reports are included as EXHIBIT G The removed spoil <br /> was returned to the hole, and barricades were placed around the <br /> ' site Refer to EXHIBIT E for a copy of the tank tracking <br /> records- Copies of the Underground Storage Tank Unauthorized <br /> Release Contamination Report, (494-U32, ) and Notice of Hazardous <br /> Waste Discharge report, (Form EH-22 013, ) are included as EXHIBIT <br /> F Correspondence from the San Joaquin Co- EHD, dated July <br /> 18, 1994, requires further assessment work to ;valuate possible <br /> 3 <br />