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1 <br /> Results of Initial Investigation and Work Plan <br /> ARCO Service Station No. 760, Lodi, California <br /> December 18, 1990 <br /> AGS 38048-4 <br /> BTEX by EPA Method 8020. Soil samples collected from under the farmer leaded <br /> tank will be submitted for analysis of total and organic lead. oasoline <br /> Soil samples associated with the former waste-oil t <br /> ank cavitY will be analyzed <br /> BTEX,TPHd,and TOG. Results of our May 1990 Id investigation indicatedfor <br /> TPHg and <br /> ther ttal <br /> metals, VOC's and'base neutral and acids with open scan for creosote were below defection <br /> limits for the methods used (Tables 1 and 2). <br /> All Iaboratory results will be discussed with ARCO personnel and with ARCO's approval <br /> forwarded to the SJPHS. A copy of a signed Authorization to Release <br /> Analytical <br /> is included in Appendix C of this work pl4n. The new gasoline tanks will be installed after <br /> the SJPHS receives the laboratory reports and approves <br /> waste-oil tank cavity will be backfilled after the SJPHS receives the laboratory re orfs a former <br /> approves the task. p and <br /> OBTAMMTG APPROVAL FOR TANK WSTAU A-ITON <br /> With ARCO's approval, laboratory results and a sample location map will be provided <br /> the SJPHS to expedite the installation of the new underground storage tanks h to <br /> acknowledgment,included in Appendix C of this work plan, commits ARCO The better of <br /> � to submitting <br /> either a Soil Contamination Work Plan or a report on the tank removal investigation within <br /> 3 months of completing the field work. If laboratory results indicate TPHg concentrations <br /> greater than 10 ppm and BTEX concentrations greater than 1.0 <br /> base of either excavation,Applied GeoSystems will recommend that ARCO sub mit theemain in place Soil the <br /> Contamination Work Plan within 3 months Of completing the field work. $oil <br /> will describe proposed procedures for further delineation of gasoline The Work Plan <br /> g hydrocarbons in s�;l <br /> 18 <br /> App/ied �eoSyst��ms -� <br />