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ARCO #0595 Page 1 of 2 LTCP Checklist GO GFOMRACKIER NONE I MANAGE PRWECTS IREPORTS I§F.ABO I L92W CAEN.SUE ASSESSMErrr ARCO 80596(70607700319)-MAP THIS SITE 6100 HWY 99 N FRONTAGE ROADCLEANUP OVERSIGHT AGENCIES ACTIVITIES REPORT SAN JOAQUIN COUNTY LOP(LEAD)-CASE C:0707 STOCKTON,CA 95212 Fre<e SAN JOAQUIN COUNTY PUBLIC E CASEWORKER: MARIN-aUPERN50R:AORIENNE ELLSAESSER CENTRAL VALLEY R4WCB(REGION 551-CASE R 390411 c MMeaV FOR IH B SIiE CASEWORKER:!AMESB RTON-SUPERVISOR:CORI CONDON CR Site ID a:NOT SPECIFIED THISPROIECTWASIASf MODIFIED BYN�I NI FANDFR'ONONAAYM152:08:0a PM-HISTORY Tide m,NAS auBMITTALs.CLICK HERE TO OPEN A NEW WINDOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE CLOSURE POLICY THIS VERSION IS IN PROGRESS AS OF 4/6/1015 CHECKLISTIMMATEO ON lr312013 Cl_yRF FORey, N�TORY General Criteria-The site satisfies the policy general criteria-C ee'y..SECTION a.Is Me unaubwreed release located wiMin Me service erect of a public water system? r YES r NO b.The unauthorized release Consists only of petroleum LDflil. is YES r NO c.The unauthorized("primary)release from the UST system has been stopped r YES r NO d.Free product has been removed to the maximum extent practicable jjlfgj. r FP Not Encountered r YES r NO e.A conceptual site model that assesses the nature,extent,and mobility of the release has been developed LbL91. r YES r NO I.Secondary source has been removed to the extent practicable LDM. r YESr NO g.Soil or groundwater has been tested for MTBE and results reported in accordance with Health and Safety Cade Section f Not Required r YES r NO 25296.15. IL Does a nuisance exist,as defined by Water Cade section 13050. r YES r NO 1.Media-Specific Criteria:Groundwater-The contaminant plume that exceeds water quality objectives is stable or decreasing in areal extent,and meels all of the additional characteristics of one of the five classes of sites listed below.-011PARsEcTIONANsmRs EXEMPTION-Soil Only Case(Release has not Affected Groundwater-ld2) r YES Is NO Does Me site meet any of Me Groundwater specific criteria scenarios? r YES r NO ADDITIONAL QUESTIONS-Please indicate only Mose conditions Mat do not meet the policy criteria: Plume Length(That Exceeds Water Quality Objectives): r a 1G Feet and<250 Feet r a 250 Feel and<1 000 Feel r a 1,000 Feet r Unkrwwn Plume is Stable or Decreasing in AREA Extent: r No r Unknown Free Product in Groundwater: r Yes r No r Unknown Free Product Has Been Removed to the Maximum Extant Practicable: r No r Unknown For sites with free product,Me Plume Has Been Stable or Decreasing for 5-Years(info); r No r Unknown For sites with free product,owner Willing to Accept a Land Use Restriction(if required) r No r Unknown Free Product Extends Othello: r Yes r Unknown Benzene Concentration r t 1,000 pg/I and<3,000 pgA r a 3,000 pgll r Unknown MTBE Concentration: r z 1,000 pq/I r Unknown Nearest Supply Well(From Plume Boundary): is s 250 Feet r>250 Feet and s 1.000 Feet r Unknown Nearest Surface Water Body(From Plume Boundary): C s 250 Feet r >250 Feet and 51,000 Feet r Unknown 2.Media Specific Criteria:Petroleum Vapor Intrusion to Indoor Air-The site is Considered low-threat for the vapor-intrusion-to-airpathway ifsite- F NO specific conditions satisfy items 2a,2b,or 2c- Lea sEcnm AN Rs EXEMPTION-Active Commercial Petroleum Fueling Facility r YES r NO Does Me site meet any OF Me Petroleum Vapor Intrusion to Indoor Air specific criteria scenarlos? r YES r NO ADDITIONAL QUESTIONS-Please indicate only Mose conditions Mat do not meet the policy criteria: Sell Gas Samples: C'No Soil Gas Samples r Taken Incorrectly Exposure Type: C'Residential r Commercial Free Product: r In Groundwater r In Soil r Unknown TPH In Me Bioeffenuation Zone: r z 7DO mg/kg r Unknown r Soil samples not taken at two depths within 5 e.zone(only for Scenario 4 with BioZone) Bloatenuation Zona Thickness: https:Hgeotracker.waterboards.ca.gov/regulators/screens/closure_Tolicy.asp?global_id=T06... 4/6/2015