State of Idaho Department of Environmental Quality requested EPA's assistance with the assessment and evaluation of the Northwest Gas & Go Service Station site. The site is located in Sandpoint, ID.
An indeterminate quantity of petroleum products are found below ground surface. The products are present due to known or suspected historical releases from the service station and other nearby facilities. The products are suspected to be the source of a chronic release to the western shoreline of Sand Creek, a navigable tributary to Lake Pend Oreille. The creek is seasonally inundated by Lake Pend Oreille such that it is indistinguishable from the lake.
Sand Creek is a year-round, publically accessible economic, recreation, and environmental resource that flows through downtown Sandpoint. Many businesses are situated overlooking the creek; a marina and city park with boat launch and swimming beaches are located about one-half mile downstream of the seeps; and fish and wildlife are found throughout the area potentially affected by the seeps.
The purpose of this assessment is to gather, review, and evaluate existing data to determine whether additional investigation is required to understand site conditions or what action must be taken to mitigate the threats of release.
