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KNOWLES STATION Page 1 of 2 LTCP Checklist GO GEOTRACKER HOME I MANAGE PROJECTS I REPORTS I SEARCH I LOGOUT KNOWLES STATION(T0607700078)-MAP THIS SITE OPEN-REMEDIATION 1140 HAMMER LN W CLEANUP OVERSIGHT AGENCIES STOCKTON,CA 95209 ACTIVITIES REPORT SAN JOAQUIN COUNTY LOP(LEAD)-CASE#:1124 SAN JOAQUIN COUNTY PUBLIC WEEPAGE CASEWORKER:ANGELICA SANDOVAL MA RIN-SUPERVISOR:ADRIENNE ELLSAESSER VIEW PRINTABLE CASE SUMMARY FOR THIS SITE CENTRAL VALLEY RWQCB(REGION 5S)-CASE#.390107 CASEWORKER:JAMES SARTON-SUPERVISOR:CORI CONDON CUF Claim M 854 CUF Priority Assigned:B CUF Amount Paid:5387241 THIS PROJECT WAS LAST MODIFIED BY NUEL HENDERSON ON 6/62014 11:44:09 AM-kff= THIS SITE HAS UNAPPROVED SUBMITTALS.CLICK fffin TO OPEN A NEW WINDOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE. CLOSURE POLICY THIS VERSION IS FINAL AS OF 6/6/2014 CHECKLIST INITIATED ON 71112013 CLOSURE POLICY HISTORY General Criteria-The site Satisfies the policy general criteria-CLEAR sEcTIoN ANSWERS YES a.Is the unauthorized release located within the service area of a public waters stem? Name of Water System: IStocklon East Water Dist. YES C NO b.The unauthorized release consists only of petroleum JMpl. YES C NO c.The unauthorized("primary')release from the UST system has been stopped. R YES C NO d.Free product has been removed to the maximum extent practicable IbLQ1. 13 FP Not Encountered C YES C NO e.A conceptual site model that assesses the nature,extent,and mobility of the release has been developed JbfPJ. 6 YES C NO f.Secondary source has been removed to the extent practicable linfP1. W YES C NO g.Soil or groundwater has been tested for MTBE and results reported in accordance with Health and Safety Code Section 25296.15. Not Required r YES C NO h.Does a nuisance exist,as defined by Water Code section 13050. YES G NO 1.Media-Specific Criteria:Groundwater-The contaminant plume that exceeds water quality objectives is stable or decreasing in areal extent.and YES meets all of the additional characteristics of one of the five classes of sites listed below.-CLEAR SECTION ANSWERS EXEMPTION-Soil Only Case(Release has DM Affected Groundwater-Jok) YES f'' NO Does the site meet any of the Groundwater specific criteria scenarios? 0' YES NO 1.1-The contaminant plume that exceeds water quality objectives is<100 feet in length.There is no free product.The nearest existing water supply well or [: YES NO surface water body is>250 feet from the defined plume boundary. 2.Media Specific Criteria:Petroleum Vapor Intrusion to Indoor Air-The site is considered low-threat for the vapor-intrusion-to-air pathway if site- NO specific conditions satisfy items 2a,2b,or 2c-CLEAR SECTION ANSWERS EXEMPTION-Active Commercial Petroleum Fueling Facility C YES G NO Does the site meet any of the Petroleum Vapor Intrusion to Indoor Air specific criteria scenarios? r YES f' NO ADDITIONAL QUESTIONS-Please indicate only those conditions that do not meet the policy criteria: Soil Gas Samples: I'No Soil Gas Samples I-Taken Incorrectly Exposure Type: r Residential r Commercial Free Product: I- In Groundwater I' In Soil Unknown TPH in the Bioattenuation Zone: G >100 mg/kg r Unknown I' Soil samples not taken at two depths within 5 ft.zone(only for Scenario 4 with BioZone) Bioattenuation Zone Thickness: C<5 Feet(No BioZone) r z 5 Feet and<10 Feet r>10 Feet and<30 Feet I->30 Feet r 30ft BioZone Compromised TPH>100mg/kg Unknown 02 Data in Btoattenuation Zone: r No 02 Data C'02<4k 02>4% Benzene in Groundwater: I'>1DO pg/I and<1,000 pg/I �' >_1,000 pg/I C Unknown Soil Gas Benzene (^>_85 pg/m3 and<280 pg/m3 I->_280 pg/m3 and<85,000 pg/m3 >_85,000 pg/m3 and<280,000 pg/m3 (_>280,000 pg/m3 I' Unknown Soil Gas EthylBenzene: C>1,100 Ngim3 and<3,600 pg/m3 C z 3,600 pg/m3 and<1,100,000 pg/m3 I'>1,100,000 pg/m3 and<3,600,000 pg/m3 r>_3,600,000 pg/m3 I"Unknown Soil Gas Naphthalene: r>93 pg/m3 and<310 Nglm3 C>310 pg/m3 and<93,000 pg/m3 r>_93,000 pg/m3 and<310,000 Ng/m3 ('a 310,000 pg/m3 r Unknown 3.Media Specific Criteria:Direct Contact and Outdoor Air Exposure-The site is considered low-threat for direct contact and outdoor air exposure YES if it meets 1,2,or 3 below.-CLEAR SECTION ANSWERS EXEMPTION-The upper 10 feet of soil is free of petroleum contamination l" YES R NO Does the site meet any of the Direct Contact and Outdoor Air Exposure criteria scenarios? f" YES O NO 3.1-Maximum concentrations of petroleum constituents in soil are less than or equal to those listed in the following table(LINK)for the specified depth R YES NO below ground surface. Additional Information https://geotracker.waterboards.ca.gov/regulators/screens/closure_policy.asp?global_id=T06... 6/6/2014