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... .. ...moi J <br /> M 0. <br /> Results of Initial <br /> Inv estigaticil and Work plan <br /> -! A- CO Service Station No. 760, <br /> Lod(, California December 18, 1)90 <br /> '. AGS 38048-4 <br /> Tanks. Tri-Rp ivr_a! <br /> B RecommendatjWIS. A <br /> Rrpoctxng Reguircrn�nts(CRW PpendQ A. Central Valicy Regional Board <br /> '�`•r QCD.April 1989):and 3 <br /> ® {I-UFI]Field Manual; { )Leaking Underground Fuel Tana <br /> ;•' Guidelines for Site Assessment, Cleanup,Tank Closure (CRW p.and Underground S;;rage <br /> `�C�. October 19$q) A letter of ackrzowled <br /> Appendix C of this work plan, gRjent is included in <br /> A Work Ilan for excavating near the forme _ <br /> SJPHS A former oil tank cavity has been a <br /> { Ppliod GcoSystems Report No.3804$-2,dated April 23, 1990 a approved by the <br /> 1990 <br /> Addendum). At ARCO's re nest <br /> cavity until the safe ,we will.� to xcay.. nd September IS <br /> limits of the o soil from the.former wasfe-oiI tank <br /> Aerating equipment with respect fo the sidewa]] r <br /> are reached, Field <br /> methods discussed in the April 23, 1g9�� tability <br /> be followed. <br /> Work Plan a,-,d addendum will <br /> We will conduct the following tas!cs; <br /> Q Upda!e the site safety plan <br /> Observe excavation of soil in and around the <br /> gasoline-tank cavity. <br /> y��collect appropriate soil samples within 2 to 4 feet belovr ih <br /> t <br /> � former tanks to evaluate if hvdrocarbo <br /> nous evidence indicates hydrocarbons remain in slate remains in e b:se of the <br /> excava#ion of the tank cavity before sampling place. If field <br /> Place, we will ob;;e,,,e further <br /> plrng the soil. <br /> o Observe additional excavation in the <br /> results of soil samples Whetted from the abase and sidewal[s of the esol- <br /> me-tank cavity, until xcavated <br /> area indicate soil containing greater than 10 <br /> 1,0 aprn benzene is removed, pp'n of TPH a ted <br /> Excavation will continue and greater than <br /> operating limits of the equipment with r ntil the <br /> surrounding structures are reached. A aspect to the sidewall stability s.+.e <br /> from the base and sidewalls of theopriatesoilsampleswillbecollectea <br /> lrydrocarbonous soil has been removed. excavated area to etialu4tc if <br /> 12 <br /> w <br /> �Pplred GeoS�sfenas -----__��_ f <br />