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STALLWORTH AUTO DET '�L Page 2 of 2 yp� r s 250 Feel r > 250 Feet ands 1 ,000 Feet r Unknown I 2. Media Specific Criteria: Petroleum Vapor intrusion to indoor Air - The site considered low-threat Por the vapor-intrusion-to-air pathway dsite- NO specific conditions satisfy items 2a, 2b, or2c- CLEAR SECTION ANSWERS EXEMPTION - Active Commercial Petroleum Fueling Facility r YES r NO Does the site meet any of the Petroleum Vapor Intrusion to Indoor Air specific criteria scenarios? r YES r NO ADDITIONAL QUESTIONS - Please indicate only those conditions that do not meet the policy criteria: Soil Gas Samples : r No Soil Gas Samples r Taken Incorrectly Exposure Type : C Residential r Commercial Free Product ; r In Groundwater r In Soil r Unknown TPH in the Bioadenuation Zone : r > 100 mg/kg is Unknown r Soil samples not taken at two depths within 5 ft. zone (only for Scenario 4 with BioZone) Bioaftenualion Zone Thickness : r < 5 Feet (No BioZone) r 2 5 Feel and < 10 Feet r 210 Feet and < 30 Feet r 2 30 Feet r 30118 ioZone Compromised TPH > I0omglkg r Unknown 02 Data in Sloattenuation Zone : r No Oz Data r02 < 4% rOz24% Benzene in Groundwater : r 2 100 poll and < 1,000 pgll r >- 1,000 pg/1 r Unknown Soil Gas Benzene r a 85 pg/m3 antl < 280 pglm3 r 2 280 Pg/m3 end < 85,000 pg/m3 r 2 85,000 pg/m3 antl < 28QDoo Pg/m3 r 2 280,000 pglm3 r Unknown Soil Gas EthylBenzens : r21,10Opg/m3and < 3,600pg/m3 r23,60Opg/m3and < 1,100,000pg/m3 r' 21 ,100,00pglm3and < S600,0WPg/m3 r23,600,000P9/m3 CUnknown Sol] Gas Naphthalene : r 2 93 pglm3 and < 310 pg/m3 r2 310 pg/m3and < 93,000 gg/m3 r 2 93,000 pg/m3 and <310,000 pgim3 r 2 310,000 pg/m3 r Unknown 3, Media Specific Criteria: Direct Contact and Outdoor Air Exposure - The site is considered low-threat for direct contact andoutdoorairexposure NO ifitmeets 1, 2, or3 below. - CLEAR s CTION EXEMPTION - The upper 10feet of soil isfree ofpencleum contamination r YES r NO Does theatre meet any of the Direct Contactand Outdoor Air Exposure criteria scenarios? r YES is NO ADDITIONAL QUESTIONS - Please indicate only Mose conditions that do not meet the policy criteria: Exposure Type : r Residential r Commercial r Utility Worker Petroleum Constituents in Sol : r 5 5 Feet togs r >5 Fact togs and sm Feet bgs r Unknown Soil Concentrations of Benzene ; r > 1.9 mglkg and s 2.6 mgrkg r > 28 m9/kg and < 8.2 mg/kg r > 8.2 mgtko and s 12 mglkg r > 12 mg/kg and < 14 mg/kg r > 14 mg/kg r Unknown Soil Concentrations of EthylBenzene : C' > 21 mg/kg and s 32 mglkg r > 32 mg/kg and s 89 mglkg r > 89 mg/kg and s 134 mglkg r > 134 mglkg and < 314 mglkg r > 314 mglkg (: Unknown Soil Concentrations of Naphthalene : r > 9.7 mglkg and s 45 mg/kg r > 45 mglkg and s 219 mg/kg r > 219 mg/kg IVUnknown Soil Concentrations of PAH : r > 0.063 mglkg and s 0,68 mglkg r > 0.68 mglkg and s 4.5 mglkg r > 4.5 mg/kg is Unknown Area of Impacted Soil : r Area of Impacted Soil > 82 by 82 Feel r Unknown Additional Information Should this case be closed in spite of NOT meeting policy criteria? r YES r NO SPELL CHECK i Save in Progress Save as Final LOGGED IN AS MAMASITAUM CON1691G ACKER HELP https://geotraelcer.waterboards.ca.gov/regulators/screens/closure—Policy.asp?global_id=TO.. . 7/24/2013