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INXON #7-3942 Page 1 of 2 pow LTCP Checklist - ® OMAN, c FRI�HOME I bdAMAnE"AMA-ERPnAFr.M 1 REPORTS 16 1 L22W OPEN-REMEDIATION EXXON#7-3942(TO607700019)-MAP THIS SITE 4444 PERSHING AVEN ACTNITIESREPORTSANSAN JOAOAN pJ-LASE r-2231 STOCKTON,CA 95207 CASEWORKER:HAR NXN0 L-SUPEFVISOR:ADRIENNE ED.SAESSER SAN JOAQUIN COUNTY PUBLIC WEBPAGECENMALVALLEY RW��GuCcBe(REGION u 55)-CASE(:390025 CASEWORKER:I,MM-SUPEFVISOR:BRIAN NEVVMAN WEAPRINIAM9CASESUM e FOR1HSSrtE CUF CVM r:5312 CUF PriorerAui9me:0 <UF Amoum PeM:yl4W aaa THIS PROJECT WAS LAST MODIFIED BY wane ruKuru r ON 61320138:27:41 AM-1 la= THIS SDE HAS UNAPPROVED SUBMITTALS.CLICK BF.BE TO OPEN A NEW WINDOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE. CLOSURE POLICY THIS VERSION IS IN PROGRESS AS OF 513012013 OHECKLIST IMTIATED 0V S3020L5 CLOSURE E PO -Y HISTORY General Criteria-The site satisfies the policy general Criteria- EARs SECTION ANSWERS YES a.Is the unauthorized release located within the semi»arae of a public waters stem? An YES (' NO NMmof Woossystem: Calwatw b.The unaulncraed release consists only of petroleum jpdo), r VES r NO c The unauthorated('primary)release from the UST system has been stopped. r YES r NO d.Free product has been removed to the maximum extent practicable LM. 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 L1. 0, YES r/NO L Secondary source has been removed practicable to the extent practicae J MPJ. is VES i NO g.Soil or groundwater has been tested for MTBE and results reported in accordance with Health and Safety Cade Section r Not Required 9'VES r NO 25296.15. h.Does a nuisance exist,as darned by Water Code section 1305^_. r VES G NO 1.Media-Specific Criteria:Groundwater-The contaminant plume that exceeds water quality objectives is stable Or decreasing in areal extent,and NO meets all of the additional Characteristics Of one Of the five Classes of sites listed below.-CLEAR SECTON ANSWERS EXEMPTION-Soil Only Case(Release has D21 Affected Groundwater-latg) r VES r NO Does the site meet my of Me Groundwater specific criteria scenadoa? r YES r NO ADDITIONAL QUESTIONS-Please indicate only those conditions Mat do not meet Me policy criteria: /1� Plume Length(Mat Exceeds Water Quality Objectives): Sd4l( Oyl1z= LJQ C z 100 Feet and<250 Feet r z250 Feet and<1,000 Feet r z 1,000 Fast r Unknown uuA_ )f : 9 OW Plume is Stable or Decreasing in AREAL Extent: Ll\J A W T a f-� r No r Unknown Iy�r 1 -`U Free Product in Groundwater: Y1P / 1t�cdr : J60 r Yes r No r Unkrwwn Vuiz ?iJ Free Product Has Been Removed to the Maximum Extent Practicable: �Jf �O'� C No r Unknown 1C J� r bb.-jXKr = For sites with free product,the Plume Has Been Stable or Decreasing for S-Years(info) C No r Unknown For sites with free product,owner Willing to Accept a Land Use Restriction(if required) C No r Unknown Free Product Extends Offsite r Yes r Unknown Benzene Concentration �/ r 21 000 pgfl and<3,000 pen y z 3,00D pgA r UNmown MTBE Concentration: C z 1,000 pgP r Unknown Nearest Supply Well(From Plume Boundary): r s 250 Fast r 1250 Feet antl s 1,000 Feet r Unknown Nearest Surface Water Body(From Plume Boundary): r s 250 Feet r z 250 Feet antl S 1,000 Fset r Unknown 2.Media Specific Criteria:Petroleum Vapor Intrusion to Indoor Air-The site is considered low-threat for the"partintrusion-Wairpstia H site-specific conditions satisfy items 2a,2b,or 2c-cLEAa secnoN Arvswt=Rs EXEMPTION-Active Commercial Petroleum Fueling Facility r YES or NO Deas the site meet any of the Petroleum Vapor intrusion to Indoor Air specific criteria scenarios? r YFS r NO 2.-Scenario 1(example).Unweathered LNAPL in Groundwater-The bioattenuation zone is a continuous zone that provides a separation of at least 30 feet vertically between the LNAPL in groundwater and the foundation of existing or potential buildings,and total TPH(TPHg and TPHA combined)are<100 r YES r NO mgAg throughout the entire depth of the bioattenuation zone. 2a-Scenario 2 rexamplel-.Unweathered LNAPL in Soil-The bioattenuation zone is a continuous zone that provides a separation of at least SO feet both laterally and vertically between Me LNAPL in soil and the foundation of existing or potential buildings,and total TPH are<100 mgfkg throughout the entire r YES r NO depth of the bioattenuation zone. 2a.Scenario 3 f...mollu.Dissolved Phase Benzene Concentrations Only in Groundwater(Low concentration groundwater scenarios with or without 02 measurements must satisfy one i,ii,or iii): I.For bioadenuation zona wshoul oxygen measurements or oxygen<4%and benzene concentration are<100 pgfL,the bioattenuation zone:Ise https://geotracker.waterboards.ca.gov/regulators/screens/closure—Policy.asp?global_id=TO... 6/27/2013