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w <br /> .r <br /> CHRONOLOGY <br /> SHELL OIL COMPANY <br /> 3725 N. TRACY BLVD., TRACY <br /> LOP SITE CODE: 1417 <br /> CVRWQCB CASE #390142 <br /> APN: 21217030 <br /> 0411985 A waste oil underground storage tank(UST) was removed this period. <br /> Environmental Health has no documents on the removal. <br /> 11/19/85 On this date three gasoline UST's were removed. Soil and groundwater <br /> samples were collected from the excavation and analyzed. Gasoline was <br /> detected in soil and groundwater. Three new double walled USTs were <br /> reinstalled in the,excavation. <br /> 08/15/89 The site was placed in the Local Oversight Program and.a Notice of <br /> Responsibility was sent to the responsible party on this ate . <br /> 08//07/89- BY this date 12 soil borings were completed and three of the borings were <br /> 09/15/89 converted into monitoring wells MWI, MW2 and MW3. <br /> 09/19/89 A Notification of Hazardous Waste Discharge was filed by EHD on this <br /> date. <br /> 11/22/89 Date of the Pretank Closure Assessment Report detailing the work <br /> r performed in August and September 1989. <br /> 05/04/90 The three-USTs that were installed in.1985 were removed on this date and <br /> .contaminated soil was excavated and disposed off-site. Soni and water <br /> samples were collected from the excavation for analysis. <br /> 07/05/90 The three monitoring wells installed in 1989 were damaged during <br /> construction at the site so they were destroyed under EHD permit and <br /> inspection on this date. <br /> 4 08/16/90 Three replacement monitoring wells were installed on this date (MW-IA, <br /> MW-2A and MW-3A).. <br /> 11/20/90 Date of the Preliminary report and Tank Closure-Report detailing the work <br /> 1 performed in 1990. <br /> 11/02/99 Date of the Cambria Environmental Sensitive Receptor Survey.for the site. <br /> s <br /> 12/17/01 One CPT was completed in the area of MW-1 to a total depth of 114 feet <br /> below surface grade on this date. <br /> r <br /> i <br />