SITE INFORMATION AND CORRESPONDENCE_FILE 1

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7.i o-199 8 4=0OPM FROM AAVALON EM IRON EN f AL t Ira out► %.f DRAFT Avalon Environmental Consultants ( v on) prolapses performing subsurface investigative work at the property known as the)oe"s lila ruck Stop on behalf of the Dhoot Brothers, owners of the tt truck stop. The Property is located i' the west side of the City of Lathrop, off Interstate 5, at �f 15arlan Road. Former locat on t fit I•lhe site were two separate underground storage tank(US I areas. One tank area contained one 12,000 gallon diesel UST, located in the south central on of the property. The ter UST area contains one 10,000 gallon unleaded:dine U a 8, 000 gallon dill UST, and one 5,000 gallon diesel UST. All of the above tanks hav removed railer the ovqrsI&of the Sart Joaquin County Environmental Health Department Underground Tank Unit, and 4replaced with above, ground tanks bated on the same property. In a preliminary site assessment prepared by Advanced GeoEnvi ron mental Inc.dated January 1937, bath tank areas exhibited groundwater contamination. Ttwpurpose of this investigation is to more fully define the vertical nd horizontal limits of sail apd groundwater contamination. The attached Figure 1 shows the location of the proposed borings., 51fiE'SA MIR HEAI.T,H,P At+i Prig to subsurface testing,as required by law,a°Site Safety and Health plan will be prepared in order to insure that all workers and sub- tractors are aware of the risks and:safety procedures relative to the Phase 11 testing. IMLGAU,Ufl A- NQ SAHaY MEETlhfj Before the sW of field operations,a Tailgate Health and Safety Meeting wilI be conducted each day by the Project Manager or Health and Safety Officer to discuss anticipated risks and health haraMs and the,proper precautions that need to be observed. UNINKGROUND S1lbliti'V__ la AL }T_ Additionally, as required by law, Underground Service,alert (UsA)will be contacted to check the: Proposed probe locations for conflict with public utilities, such as gas or electrical litres. Complete ply cif subsurface plum hg in the arrea cif the underground tanks will need to be provided to the consultant by the owner to insurethat subsurface piping, and product lines are not penetrated. We estimate approximately fifbeem Swprobe borings will be drilled on the-sul4e ct property. Eleven borings will be advanced to a d of approximately 12 feet below ground sgurface OW). f=our botings will be advanced to depths of approximately 20 feet b s. The four 20 foot geoprobe borings will be continuous cares with plash rimers, and two borings will be placed in each tank area. The Project#9627-001-1 Ju3y lG,.:iLathrop,lUdomia