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' Preliminary Screen for Potential Vapor Intrusion Conditions Matrix VELASQUEZ WKA No. 8237.01 ' Phase I ESA Preliminary Screen for Potential Vapor Intrusion Conditions(pVIC)matrix includes a(1)Search Radius Test, (2) Chemicals of Concern Test(COC), and(3) a Critical Distance Testlri. (1) Search Radius Test: Are there any known or suspect contaminated sites in the primary area of concern within the corresponding search radii? (see Table attached Table 1). ' Y Yes ❑ No if No,then screening for a pVIC is complete and no pVIC currently exists,go to#4. If Yes,then: (2) Chemicals of Concern[21 Test: Are COC likely to be present within the area of concern for those known or suspect ' contaminated sites identified based on the Search Distance Test? ' X Yes ❑ No If No,then screening for a pVIC is complete and no pVIC currently exists,go to#4. If Yes,then: If Yes, check all COC that apply on attached Table 2. ' (3) Critical Distance Test: A plume test to determine whether or not COC in the contaminated plume(s)may be within the critical distance. ' (3a)Is information related to the comaminated(s)plume available(i.e. isoconcentration maps,site drawings, etc.)? Yes ❑ No (3b)If No,then screening for a pVIC is complete and no pVIC currently exists, go to#4. If Yes,then: ' (3c)Is the site less than 100 feet to the nearest edge of a contaminated[non-petroleum hydrocarbon] plume(s)? XYes ❑ No ' (3d)Is the site less than 30 feet to the nearest edge of a dissolved petroleum hydrocarbon plume(s)? XYes ❑ No C If the distance from the nearest edge of a contaminated plume to the nearest existing or planned structure on the site is less than 100 feet for non-petroleum hydrocarbon COC,or less than 30 feet for dissolved petroleum hydrocarbons,then it is presumed that a pVIC currently exists beneath the site. If the distance from the nearest edge of the contaminated plume is greater than or equal to 100 feet for non-petroleum hydrocarbons,or 30 feet for dissolved petroleum hydrocarbon chemicals ' of concern,then it is presumed unlikely that a pVIC currently exists beneath the site. (4) Is it likely that a pVIC currently exists beneath the site? ' Jdl Yes ❑ No If Yes, then recommend performing a full scope VIC assessment according to ASTM E 2600-08. fit]Based on guidance presented in to ASTM E 261 Standard. (2)Cherricsrs)o(wddern(COC): See attaGieE table for typical chemicals of condom(as presented in Appendix x8 of to ASTM E 2800.08 Standard). 1