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TOP FILLING STATION . 0 Page 1 of 2 Path to Closure Plan �- Go 'door Rp K RHOM IMANAGEPROJELTB I REC22T§i BF,8B2HI L222Z TOP FILLING STATION(70607700263)-MAP THIS SITE OPEN-RIDWEDIATION 101 WILSON WAYS ACTIVITIES REPORT CLEANUP OVERSIGHT AGENCIES STOCKTON,CA 95205 SAN JOAQUIN COUNTY LOP(LEAD)-CASE r:1294 SAN JOAQUIN COUNTY PUBLIC WEEPAGE CASEWORKER:A.".SEr Ire RANDOV•LMARIN-SUPERVISOR:ADRIENNE ELLSAESSER VEW PRWARLE CASE SUMNARYRTH CENTRAL VALLEY RWOC3(REGION W)-CASE a:390339 CASEWORKER:JAMESa&M-SUPERVISOR:CORI CONDON CUP CNIm s:B79 CUP Priority Assigned:B CUF Amoum Paid:$1.154.64 THIS PRO)ECT WAS LAST MODIFIED BY IJLLHWDER NON6 20149:SAW AIV-dIMEY THIS SITE HJUS sUBMITTAIS.CLICK HERP TO OPEN A NEW WINDOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE. Path to Closure Plan THIS VERSION IS FINAL AS OF 6262014 PATH TO LLOaDREH3TORV CLEAR IRESET PATH TO CLOSURE IMPEDIMENT 1: General Criteria E:A conceptual site model that assesses the nature,extent,and mobility of the release C Procedure)_I -IgE2 has NOT an developed Stw to Resolve Impediment 1-Sted 1: DELETE STEP - A CSM has been developed, but doesn't resolve the issue of HfBE is ecting the 102 S. Nilson way site and COMPLETION DATE extending to Eugenia Street. A professional opinion based on available data should be rendered on this EMECTEDO&MC LDAM Point. 12/302016 l r� T ADD ADDITIONAL STEP IMPEDIMENT 2: Generel Criteria F:Secondary source has NOT been removed to the extent practicable r Procedural Impediment-= to Resolvelm iment2- 1:- The its has undergone SVE —fission, vin, 24,663 pounds of contaminants and is in rebound COMPLETION DATE e reno testing) the site is still under active groundwater extraction (GRE) reNadiatlon, which should be PROJECTEP DA r L 11 continued to a point of diminishing effectiveness.. 93D1"N15 ADO ADDITIONAL STEP IMPEDIMENT 3: Media-Specific Criteria:Groundwater:The contaminant plume that exceeds water quality objectives la f Procedural Impediment-I= NOT stable or decreasing In areal extent,and does NOT meet all of the additions characteristics of one of the five classes of sites. Conditions that do not meet the policy criteria: • Plume Length(That Exceeds Water Quality Objectives):2100 Feet and<260 Feet • Benzene Concentration:2 3,000 pg/1 PM to Resolve Impediment 3. 1:- The site is order active groundwater extraction (GWE) remediation, which Should be continued to a point COMPLETION DATE of diminishing effective nes a. 91111119MUM AM LOAM 9!02015 ADOAODITIONALSM IMPEDIMENTA: Media Specific Criteria,Petroleum Vapor Intrusion to Indoor AIT.The site is NOT considered low-threat for n Procedure]Impetliment-im the vapor-intrusion-to-alr pathway and site-specific Conditions do NOT satisfy Items 2a,2b,or 2c. Conditions that do not meet the policy criteria: • TPH in the Btoaltenuation Zone:Unknown • Bioattenuation Zone Thickness:Unknown • 02 Data in Bioattenuation Zone:No 02 Data • Benzene in Groundwater:21,000 pg1I • Soil Gas Benzene:Unknown • Soil Gas EthylBenzene:Unknown • Soil Gas Naphthalene:Unknown to Reaolve lm edimeLA6-Ste 1:-DEILETESTEP COMPLETION DATE Continue GWe to reduce benzene concentrations sufficiently to meet LTCP criteria D r—ACTUAL�ogTE 91302015 1 _. SWR to Resolve Impediment d-St 2:.&W&ILLM ro— report providing a professional opinion regarding a potential vapor intrusion issue basetl o site tlata COMPLETION DATE d charactexics shoultl be prepared and submitted to this office or a work plan to acgudxe sufficient CMD7W T'�ACTUAL DAM ta to resolve the potential vapor intrusion issue should be prepared and submitted to the EHD. The i2J302016 1 1 ,.T w,..e .nom„tri ,„�„w. inn...•, rn. nl�.�. .,.�ra,-r o,..,.,.... r ,Torn-. . ,on...n "on ADDADDITIONALSTEP IMPEDIMENT 6: Media Specific Criteria:Direct Contact and Outdoor Air Exposure:The site is NOT considered low-threat fl Procedural Impetliment-INEQ for direct contact and outdoor air exposure as it does NOT most 1,2,or 3. Conditions that do not meet the policy criteria: • Petroleum Constituents in Soil:>6 Feet bgs and 5510 Feet bgs • Soil Concentrations of Benzene:Unknown • Soil Concentrations of EthylBenzene:Unknown • Soil Concentrations of Naphthalene:Unknown https://geotracker.waterboards.ca.gov/regulators/screens/closure—Policy.asp?global_id=TO... 6/26/2014