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i r <br /> C A M B R I A <br /> Status Review and Recommendations <br /> A case is generally considered a closure candidate if it meets certain low-risk case criteria A <br /> low-risk soil only site has the following general characteristics <br /> • The leak has stopped and the hydrocarbon source has been removed, <br /> • The site has been adequately characterized, , <br /> • No water wells or other sensitive receptors are likely to be impacted, and <br /> • The site presents no significant risk to human health and the environment <br /> Site-specific characteristics relevant to each of the low-risk ground water characteristics are <br /> discussed below <br /> The Leak Has Stopped and the Hydrocarbon Source Has Been Removed The primary <br /> source of hydrocarbons in soil was removed when the tanks and piping were removed In <br /> addition, 690 cubic yards of hydrocarbon-bearing soil were excavated and removed from the <br /> site, substantially reducing the secondary source of hydrocarbons <br /> The Site is Adequately Characterized The combination of excavation sampling and soil <br /> borings has adequately characterized the extent of hydrocarbons in soil As indicated above, <br /> the majority of hydrocarbon mass remaining in soil is at less than 20 ft depth <br /> Drinking Water Wells or Other Sensitive Receptors: It is unlikely that ground water could be <br /> impacted since the majority of hydrocarbon mass is at less than 20 ft deep and ground water <br /> is located between 50 to 90 ft depth Therefore, there is little likelihood of ground water <br /> impact at the site and, hence, little potential to impact drinking water wells or other sensitive <br /> receptors <br /> The site presents no significant risk to human health or the environment: The site does not <br /> appear to pose a significant risk to human health or the environment for lwo pi unary <br /> reasons First, there are no hydrocarbons at concentrations and locations that appear to pose <br /> a health risk at the site Secondly, there are no probable exposure pathways that are likely to <br /> 0 result in exposure to the low concentrations remaining at the site <br /> 3 <br />