SITE INFORMATION AND CORRESPONDENCE

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I ;1, fp Groundwater Scientists • Environmental Consultants _ JUN 2 3 1982 - - ENVIRONMO]fA HMTH Toyota Town, 2150 E. Hammer Lane, Stockton,California PERM VIS EXECUTIVE SUMMARY The project site, which is the Toyota Town property at 2150 E:�Hammer Lane, is located in the northern .part of-Stockton;=Calif ornia."4 The site is surrounded by bath commercial and residential properties: =The site is bounded to the south by a - residential area and bounded to the west by an open field. To.the east of the property are commercial properties and to _the north,.further extends the Toyota Town operation_ j The site is currently an active auto mobile.sales and'service operation. Previously located at this.site were one (1)2,000 gallon underground gasoline storage tank, dispenser island, product lines and one (1) 1-,000 gallon underground waste oil: storage tank. On July 20, 1991 SEMCO, removed :both underground gasoline and ' waste oil .storage tanks.' Laboratory analyses of soil samples collected beneath these tanks-indicate that concentrations of gasoline and.benzene werezin excess of State and County , = guidelines. Moreover,._concentrations of motor.oil and volatile organic halogens- warranted additional site characterization work. Six.(6) -boreholes were drilled in. 1991 and nine (9) soil samples were analyzed to - - assess the vertical and lateral limits of the-contaminated soil as part of the site characterization conducted:by,-AquaGeosci"ences, l;nc:_The drilling and sampling - operations were conducted according to regulatory'guidelines`and protocol. The:results of the laboratory an indicate that remedial measures are required. The corrective action to clean-up the site include the excavation and removal of the gasoline and waste oil impacte-d','soils= using an excavator, or similar earth-moving. i equipment. Soil samples collected from the excavations will be capped, sealed and> labeleb .a in ccordance with-EPA!protocols and submitted-for-analyses to a California Certified Laboratory. - - Approximately 500 cubic yards 6f-soil will be removed during the excavation. Of the 500 cubic yards;approximately-300 cubic yards is hydrocarbon:impacted and will be transported off-site to .an appropriate landfill. Prior to transport, the contaminated soil will be laid on and covered by wisquene_until-analytical results are.received. Upon ; receipt of all proper documentation and analysis necessary for disposal, the excavated "contaminated" soils will then belremoved from the site and transported to Forward.- _. Landfill, Inc. All formal disposal'procedures.and documentation will be acquired. The excavation, removal of contaminated soils, backfilling with clean material and - = transportation will be conducted by Jim Thorpe Oil., AquaGeasciences, Inc. will provide the geological oversight of the-excavation .and disposal of the gasoline,and waste oil impacted soil. , ' c 1701 Westwind Drive, Suite 1.01- • Bakersfield, California 93301 Y- (805)'328-0962 0`FAX(805)328,1129