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EPA conducted extensive surface soil sampling in the spring of 1998 to determine whether there was any immediate threat to current residents. This sampling revealed that surface soil at approximately 19 homes with the highest overall levels of carcinogenic polyaromatic hydrocarbons (material associated with wood treating chemicals) posed an unacceptable risk over the long-term. EPA has taken action at those properties (see below.) EPA has performed a qualitative risk assessment with respect to the lagoon sludges and canal material. This material is highly contaminated source material which poses a risk to current and future residents. The primary routes of exposure include: dermal contact with contaminated sludge and soil (present and future risk) and inhalation of indoor air which contains volatile components of creosote (future risk). Source material continues to contaminate ground water which could result in a future risk associated with ingestion of contaminated ground water (future risk).
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