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STOCKTONMETROPOT 'TAN AIRPORT Page 2 of 2 r boil Gas Sorriloin,Locrilions;-No 11kialtenuallon Zrvr Beneath or adjacent to an existing buirdsor Soil gas sample or collected at least 5 feet below the barren of the building foundation. YES 401 H Frr4we construction:Th 1,40 a soil gas sample shall be collected from at least:5 feet below the ground surface degs). YES it as Sampling Locations--with Bioattenuation Zone:The criteria in Column Ain the Soil Gas Criteria table(page 5 of the Policy)apply if the 1611"Wing requirements for a Waftenuation zone are safisfie& I Minimum of 5 feet of soil between the soil vapor measurement and the foundation of an existing or ground surface of future Construction, C YES C NO; TPF/ (TPHti+TPHd)is<I00 arch(measured in at least two depths within the 5-ft zone) YES NOi' Oxygen is x 4%inemsurpti at this bottom of the 5f zone, .......... 3.Media Specific Criteria:Direct Contact and Outdoor Air Exposure-The site is considered low-threat for direct contact and outdoor air exposure if it meets 1,2,or 3 below,- ............. EXEMPTION-The upper 10 feet of soil is free of petroleum Contamination YES or NC,' Does the site meet any of the Direct Contact and Outdoor Air Exposure criteria scenarios? (- YES 0' NOil ADDITTONAL QUES71ONS-Please Indicate only those conditions that do not meet the policy criteria: Exposure Type: Residential r*Commercial r Utility Worker Petroleum Constituents in Soil, .551'comet ion, 0_>5Feet sgsand o10Feet bgs (-Unknown Soil Concentrations of Benzene >1,9 mg/kg and 5 2 8 riorky; C>2 8 nobiwi and c 8,2 arg/ki; r`>8,2mybjAantis i2rrybkg (_>12nogkqacrd.,14mg/kg (_,14mq/kg (_Unkrosen Soil Concentratkais of Ethyl name >21 noeirg and a 32 nArkyi (_>32 intift and 5 89 riniNg >89 mglkg and 9 134 noSkq C'>134 mg/kg and 5 314 mglkg >314 nooiS i" Unknown Soil Concentrations of Naphthalene r>9,7 mg/Irg and 145 mg/kg 45 mqjkg and s 219 mglkg (_>219 mglirg r* Unknown Soil Concentrations of PAH C>0,063 intiarg and s 0,68 mg/kg (_>0.68 ottillot and 5 4.5 mg/kil C>4,5 mg/kg 6t Unknown ,Area of Impacted Soil Area of Impacted Sidi>811 by 82 Foet ('Unknown ---------------------- ------------------------------ --------------- �diilonaf Information .......... Should this case be closed in spite of NOT meeting policy criteria? YES (a NO i [,.K�e P � ,cy�fer- F 1. e�..F'!Ealj ----—----- LOGGED IN AS MAMASI TALISA LQN_TArT https://geotracker.waterboards.ca.gov/regulator,s/screens/closure_policy.asp... 7/29/2013