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TABLE 1 -CHECKLIST-OF RJUN RED DATA FOR t4O FURTWER�ACMN REQUESTS ATERGRQUND TANK SITES Site Name and location: Vanco Truck Plate, 1033 W.Charter Way2. [ott,San Joaquin County(R8-0391167) y 'l. Distance to production walla for municipal;domestic, unldpa'water supply is located 600'northeast; agriculture,industry and other uses within 2000 feet of the site: ortte&Hc.wN'is 1'300' and one domestic south of 2. Site maps,to scale,of area impacted showing.locatlons of In y 2003,an unsumormed refbase,fWow fhb On any former and existing tank systems,excavation contours and a was discovered during disponOws and pfping sample locations,boring and rnonitonng well elevatkil qM rades. contours.gradients,and nearby surface waters,buildingsr adnate and subsurfaw ufflXes' SM 1ithoAdgy consists of day,alis,and sand to 100.the Y 3:Figures depicting lithorogy(cross section),treatment system depth Investigated, diagrams. - Y 4.°Stockpiled soil romaining onsite orot7•stte disposal(quantity); matsiY 300 cubic yards of excavated soll was ns 1a Forward,LaridAll.In Mantica. S MorNtorf wells.remaln! an-site tate; Seven mwilMifrfp rrW (AfW--1 through-AW)"I be pmp�ty abandoned: - .._ 6, Tabulated results of all groundwater DOOMto VOWWWOW varied from 16'to PWS.-Groundwater flow alevatlons and depths to water, dkecHon Varlet! - east-to northwest.Gro ntfrtaiter gmeffent varled ftm 0.0003.to,met JIWL 7. TaNf/laled results of all sampling Af/data stllgwtrty tabu! in vsrbua reports.indudirtg closer• . and analyses: WDetection limits for confirmation sampling N� Lead analyses tt. Concentration contours of co nterninards found and those r r ni in soil and, Thee hot of the identified �yjgroundwater,and both on-site and of-site. /c�on�tur kmfian shorm In applicable po M ELatera!and 0 vb 'oertical extent of soil contamination Lateral arid.., Vertiia:!extent of ndwater..con'aml flora 9. Zone of Influence Calculated And assumptions used tier subsurface r w0dialibn . Art sngtneerrd rerrird4 t h was trot: system and the zone of capture attained for the soil and groundwater mediation required by,the rpulatory agency. _ 10:Reports l fnibimati n . Unauthorized Rtrlease Form Q Rs 47!total tl tot 4 ra'Weiland boring logs PAR FRP Other Closure Report(VIO) 11.Best Available Technology 0471 used or an explarratlou iter not USTa'Mpirg and diapanxM trench sols removal and use 147`•.. . . natutef.'... . uatton. 12. Reasons why background wasas Aflnorresidue(s 118"grorwrd4rRtrw cartt+nrinadon renrahrs ttainable.usi BAT, ....._ 13.Mass balance calculation of substance treated camulhnt mates 0:16 gallons 0f•TP"-rGmeIn n�n , versus_that lama! while 467 of VH4 remain in so& 14. Assumptions,parameters,calculations and The ragvht*ry a&my did not recttrlre a sol'%im"survey,duo to Hie model used in risk assessments,and fate and• locadbn oftrsldsoli end groundWator contanrMaMe(mainly TPH9 transport modeling; and 7~In lire! surd); 6*W threw taunt unsotur od sone vappo►' Intrusion tFom I hale h�rgrocatbans,distance to building.(-30% and no change l s/ts use(serv(ce station), A midgebbn plan was preyosed flow the cunroat oWnar&loprrafars fo oddrdsa•gmsa cortGrtnirtatlttn a direct contact tion content'neted sous during Allure usr 15. Rationale why conditions remaining at site Sall and aontmnimwon rtedly eporis llm'bd In extent. will not adversely impact water quality, health, or Land use(COMM*"is not expected to Change in the f�oreseaaWr other benefldal uses:and fUture.Vapor' Mn and residual&oil coehminadw t'sk hawt bona addres --ftgoaftwill.bo.resebodin4ye By: JLB Commis:in May 30113;-en uneuthothwdrelease. the USTs system was discovered during dispensers end plping,�upgrades from the subject Site.Based 17 quarters of groundwater monitoring showlr<g a Date: stable phone wM declining concentraatibm extoW of contentlnaHon AWWnlag M Sall and. 9/14/2010 groundwater,-no fbressoaWe changes In land use, 'lmltod threats flwm groundwater,soft and loll vapor Intrusion.Regional Board staff concur with San loaq n CourWa Closure RecommendWon.