SITE INFORMATION AND CORRESPONDENCE_FILE 2

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TOYOTA TOWN INC AMA, Page 1 of 2 LTCP Checklist _ - © GEOTRACKER HOME MANAGE PROJECTS 13EC4HL 1 6011 TOYOTA TOWN INC (TO607700148j - MAP THIS SITE OPEN - REMEDIAnaN 610 HUNTER STN CLEANUP OVERSIGHT AGENCIES STOCKTON , CA 95202 ACTIVITIES REPORT SAN JOAQUIN COUNTY LOP d EAEg - CASE#:1151 SAN JOAQUIN COUNTY PUBLIC VJEBPAGE CASEWORKER: MyWIf� - PERWSOMADRIENNEELLSAESSER CENTRAL VALLEY RWOCB (REGION 5S) - CASE#: 390213 EWPRINTABLE CASE SUMMARY FOR MIS SITE CASEWORKEFe"ESSA - SUPERVISOR: CORI CONDON CUFCbim#: 1191] CUF Priority Assigned: 8 CUFAmount Paid 0096 THIS PROJECTWAS LAST MODIFIED BY HARLIN KNOLL ON 62520131:53:16 PM - IHSTORY THIS SITE HAS SUBMITTALS. CLICKBM TO OPEN ANEW WINDOW WITH THE SUBMITTAL APPROVAL PAGE FOR THIS SITE. CLOSURE POLICY THIS VERSION IS IN PROGRESS AS OF 5130/2013 CHECKLISTINITIATEO ONSTW013 CLOSURE POLICYHISTORY General Criteria - The site satisfies the policy general criteria - .CLEAR SECTION ANSWERS VES a. Is the unauthorized release located within the service area of a publiewaters stem? K Name of Water System : (3alwder DTt�) e� ec) G- YES CNO b. The unauthorized release consists only of petroleum Jinnnf re 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 lintol. r• FP Not Encountered rYES r NO e. A conceptual site model that assesses the nature, extent, and mobility of the release has been developetli( nfo). G YES r NO E Secondary source has been removed to the extent practicable Lam. G'YES r NO g. Soil or groundwater has been tested for MTBE and results reported in accordance with Health and Safety Code Section 25296.15. r Not Required G YES r NO h. Does a nuisance exist, as defined by Water Code section 13050. r YES G'NO 1 . Media-Specific Criteria: Groundwater - The contaminamplume that exceeds waterquatityoblectives is stable or decreasing in areal extent, and meets all of the additional characteristics of one of the five classes of sites listed below. - CLEAR SECTION ANSWERS EXEMPTION - Soil Only Case (Release hes not Affected Groundwater - Into) rVES is NO Does the site meet any of the Groundwater specific criteria scenarios? r YES -:!' NO I 1 .1 - The contaminant plume that exceeds water quality objectives is <100 feet in lerg(h. There is no free product. The nearest existing water supply well or surface water body is >250 feel tram the defined plume boundary. r YES r NO 1 .2 - The contaminant plume mal exceeds water quality objectives is <250 feet in length. There is no free product. The nearest existing water supply well or surface water body Is >1,000 feet from the defined plume boundary. The dissolved concentration of benzene is <3,000 pWL. The dissolved concentration of r YES r NO MTBE is <1 10 pg/L 1.3 - The contaminant plume that exceeds water quality objectives is <250 feet in length. Free product has been removed to the maximum extend practicable, may still be present below the site where the release originated, but does not extend off-site. The plume has been stable or decreasing for a minimum of Ove years. The nearest existing water supply well antl/or surface water body is >1,000 feet from the defined plume boundary. The property r YES r NO owner Is willing to accept a land use restriction if the regulatory agency requires a land use restriction as a condition for closure. 1 .4 - The contaminant plume that exceeds water quality objectives is <1 ,000feet in length. There is no free product. The nearest existing water supply well r YES r NO 15 surface water body is >1 ,000 fee(.'from the defined plume boundary. The dissolved concentrations of benzene and MTBE are both <1,000 pglL. - The regulatory agency determines, based on an analysis of site specific conditions, that the site antler current and reasonably anticipated near-term future scenarios, the contaminant plume poses a low threat to human health and safety and to the environment and water quality objectives will be achieved !-/yES r NO within a reasonable time frame. 2. Media Specific Criteria: Petroleum Vapor Intrusion to Indoor Air - The site is Considered low-threat for the vapor-intrusion-toairpafhway if site- NO specific conagions Satisfy items 2a, 2b, or 2C - CLEAR SECTION ANSWERS Does the site meet any of the Petroleum Vapor Intrusion to Indoor Air specific criteria scemarIoA7 r VES re NO ADDITIONAL QUESTIONS - Please indicate only those conditions that do not meet the policy criteria: Soil Gas Samples : C No Sail Gas Samples r Taken Incorrectly Exposure Type : C Residential IF Commercial Free Product : C' In Groundwater r In Soil r Unknown TPH in the Bloaftenuagon Zone : IV C z 100 mglkg r P Unknown G Soil samples not taken at two depths within 5 ft zone (only for Scenario 4 with BioZone) Bloattenuation Zone Thickness : r < 5 Feet (No BioZone) r a 5 Fast and < 10 Feet G > 10 Feet and <30 Feet r z 30 Feet r 30O BioZone Compromised TPH > 100mgtkg r Unknown 02 Detain BicattenuaGon Zone : vi' No 02 Data r02 < 4% r02z4% Benzene In Groundwater : C >_ 100 p9/1 and < 1.00 pgA r >-- 1 ,000 prig r Unknown O 11, Soil Gas Benzene : r' z 85 pg/m3 and < 280 pg/m3 r z 280 pglm3 and < 851000 pglm3 r z 85,000 lilies and < 280,000 pilings r >280,O00 pg/m3 G Unknown Soil Gas EthylBenzene : r t 1 ,100 pg/m3 and < 3,600 pg/m3 C ? 3,600 pg/m3 and < 1 ,100,000 pg/m3 r > 1, 100,000 pglm3 and < 3,600,000 pg/m3 7 > 3 3600,000 pg/m3 f' Unknown Soil Gas Naphthalene : r z 93 pillion and < 310 pg/m3 r > 310 pg/ms and < 93,000 pillars r >93,000 pg/m3 and < 310,000 pgim3 r' > 310,000 pgim3 r" Unknown https://geotracker.waterboards.ca.gov/regulators/screens/closure—policy.asp?global_id=TO. . . 7/16/2013