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JA <br /> i <br /> WALLACE•KUHL&,ASSOCIATES.ANC. <br /> I' <br /> i <br /> 1 <br /> F„ ENVIRONMENTAL SITE;ASSESSMENT <br /> ! LATl-IROP PROPERTY <br /> 91 East Thomsen Road <br /> r„ Lathrop, Callfornla <br /> WKA No. 1184.02 <br /> ' September 21, 1,990 <br /> INTRODUCTION <br /> �"' PUr Q58 and ruCQ e . <br /> We have completed aro environmental site assessment of the subjectProperty <br /> Thomsen Road, Lathrop, California. It is our understanding that the subject ro e <br /> at least one subsurface fuel storage tank. The tank(s)was reportedly located at 91 l=ast <br /> In the early 1970s, Previous work performed on#his ro er f F F Sty contained <br /> Included shallow soil borings as part Performed <br /> r Preacquisition 5'property <br /> by removed pr l,private party <br /> p p ty by our firm in April; 1990, which <br /> soils contamination b Site Assessment, revealed Subsurface <br /> ,.., y petroleum hydrocnrbans. <br /> The purpose of our work, therefore, was to define the extent of the subsurface so' <br /> hydrocarbon contamination in the vicinity of the suspected previously-existing underground <br /> g ,,• <br /> tank(s). +Is petroleum <br /> 1 fuel <br /> 1 <br /> The scope of our work Included: <br /> i,. drilling seven Soil borings (P1 through P7)to <br /> existing site grade; a maximum depth of 15 feet below <br /> - collection of soil boring samples for laboratory analyses; <br /> ' analysis of data and preparation of this report. <br /> Our firm was authorized b properly y p per,`y owners Raymond Quaresma and Steve Mothershed on May <br /> 7, 1990, to complete the environmental assessment of the props <br /> state and county regulatory agency requirements. property Joaquin <br /> accordance with current <br /> Wealth Permit/Services department verbally authorized.us to proceed with our investigation <br /> August 16, 1990;our field work occurred shortly The San County Environmental <br /> our findings rtly thereafter, on August 22, 1990. Toeresults of <br /> gs are the subject Of this report, A plan view of thero e <br /> • soli borings are presented on Plate 1; boring iogs are contained on Plates 2 throegh B. <br /> Laboratory reports and the chain-of-custody document are p F Showing the locations of <br /> provided in the Appendix, <br /> r� <br /> N:.Ni 7R9 L <br /> '),z.�). <br /> ti <br />