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HUMAN SERVICES AGENFV Page 1 of 2 <br /> L/ �..( <br /> Path to Closure Plan GO OEOTRACKER HOME MANAGE PROJECTS IE 9129 T3 IaSFLBGH ILSL9= <br /> HUMAN SERVICES AGENCY(T0607700218)-MAP THIS SITE OPEN-SITEASSESSMENT <br /> 145 SUTTER STS ACTIVITIES REPORT CLEAxuP OVERSIGHT AGENCIES <br /> STOCKTON,CA 95202 SAN JOAQUIN COUNTY LOP(LEAD)-c SCA 1257 <br /> SAN JOAQUIN COUNTY PUBLIC WEBPAGE CASEWORKER:ANGEUCA Sr1NDOVAL MARIN-SUPERWSOR:ADRIENNEEUSIESSER <br /> VIEW PR NTABLE CASE 3UMMARY FOR THIS aITE CENTRAL VALLEY RYWOB(REGION 5S)-CASE It 390296 <br /> CASEWORKER:JAMES BIRTON-SUPERVISOR:CORI CONDON <br /> CUP Cain#:8686 CUE Priority Assigned D CUF Amount Panic IQ <br /> THIS PROJECT WAS LAST MODIFIED BY NOEL HENDERSON ON CYBI2014 3'.59:52 PM-t11Cr= <br /> THIS SIZE HAS SUBMITTALS.COCK ISE TO OPEN A NEW W W DOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE <br /> Path to Closure Plan THIS VERSIONISFINAL AS OFfia/2014 PAIR TO CLOSURE HISTORY CLEM/IIEAETPAM TO CIffiURE Pl1N <br /> IMPEDIMENT I: <br /> LGeneral Cnteria E:A conceptual site model that assesses the nature,extent and mobility ofthe release I �F Procedurallmpedimerd-Wo has NOT been developed -- <br /> $t tot l elm 'm mt 5< 1 <br /> COMPLETION DATE <br /> O rginal LTCB Ch kl- pissed completing lateral assessment of im,ected groundwater. Complete <br /> lateral delineation of r J groundwater in the down gradient direction. PROJECT£O OATS ACTUAL DAM <br /> 12J3V2U11 � - <br /> -. WRHM Iwa IR ;menti-Sl 2:- TEs _-_ <br /> COMPLETION OATS <br /> Conduct aeditional groundwater monitoring events to assess natural attenuaciion race of benzene. �g <br /> _.._-61,102015_._ <br /> to RuoNelm Intent;-Step, -DELETESTEP <br /> Coo <br /> DATE <br /> glete conceptual site model With recommendation for remetliacion, additional monitoring, or site <br /> sure. Y2MRj <br /> ADD momONAL area <br /> IMPEDIMENT 2: <br /> Media-Specific Criteria:Groundwater:The Contaminant plume that exceeds water quality objectives Is <br /> E Procedural lmpediment781E2 <br /> NOT stable or decreasing in areal extent,and does NOT meet all of the additional characteristics of one of <br /> the five classes of sites. <br /> Conditions that do not meet the policy criteria: <br /> • Plume Length(That Exceeds Water Quality Objectives):Unknown <br /> • Benzene Concentration:21,000 pg/I and<3,000 pg/I <br /> • Nearest Supply Well(From Plume Boundary):>250 Feet and 5 1,000 Feet <br /> • Nearest Surface Water Body(From Plume Boundary):>260 Feet and 5 1,000 Feet <br /> 51 tot eliment2-St -rddomaArma DATE <br /> Mor..ccr ­11,, e.[_y cc aemonsrter. natural —cuccion of benzene to acceptable con[encracice. <br /> PROJECTED DA ACNAL DA <br /> 6130/2015 <br /> ADDADDIT INALSTEP <br /> IMPEDIMENT 3: <br /> Media Specific Criteria:Petroleum Vapor Intrusion to Indoor Air:The site is NOT considered low-threat for E Procedural Impediment-IMEQ <br /> the vapor-intrusion-to-air pathway and site-spectlic conditions do NOT saUsfy Items 2a,2b,or 2c. <br /> Conditions that do not meet the policy criteria: <br /> • Benzene in Groundwater:>1,000 pg/I <br /> • Soil Gas Benzene:Unknown <br /> • Soil Gas EthylBenzene:Unknown <br /> • Soil Gas Naphthalene:Unknown <br /> to Resolvelmp imem3-St -DELETESTEP DATE <br /> evaluate vapor intrusion hazard and risk with existing data or acquite such additional data as is naetled <br /> for such evaluation: included benzene, ethylbenzene and napM1CM1alene in analytical suite if additional PROJECTED DATE ACTUAL OATS <br /> data is acquired. Report findings. 12/312014 <br /> ADD ADDITIONAL STEP <br /> IMPEDIMENT 4: <br /> Media Specific Criteria:Direct Contact and Outdoor Air Expos ure:The its is NOT considered lovethreat E Procedural lmpedimeol-WQ <br /> for direct contact and outdoor air exposure as it does NOT meet 1,2,oI 3. <br /> Conditions that do not meet the policy criteria: <br /> • Petroleum Constituents in Soil:56 Feet bgs <br /> Step to Resolve lm aiment4.St 1:. <br /> aiak dna na:ata If ai[erc onm —at ec be evaluated; if additional munuCOMPLETION DATE <br /> ca is neeoen .or :nen e..alom. <br /> it should be acquired in the next phase of work. <br /> 12/312014 <br /> ADD ADDITIONAL$Tea <br /> REQUIREMENTS ALONG PATH TO CLOSURE <br /> https://geotracker.waterboards.ca.gov/regulators/screens/closure_policy.asp?global_id=T06... 6/6/2014 <br />