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8.0 ASSESSMENT OF RADON RISK DATA <br />No specific radon studies relative to the Site were located during this investigation. Based on a <br />review of the California Department of Health Services Statewide Radon Survey, the Site is <br />located in Zone 3. Average radon concentrations in Zone 3 are below 2 picoCuries per liter (pCi/1) <br />of air, below the EPA -designated action level for radon mitigation and/or control measures of 4.0 <br />pCi/1 (EPA, 1993). <br />The radon concentrations in buildings and homes depend on many factors, including soil types, <br />temperature, barometric pressure, and building construction. Information regarding the potential <br />presence of radon at the Site relies on regional data and does not represent site-specific data. <br />To determine site-specific radon levels a radon survey would have to be conducted. Because <br />regional radon levels do not appear to represent a recognized environmental condition, a radon <br />survey was not performed as part of this scope of work. <br />8-3 <br />