Superfund Explanation of Significant Difference for the Record of Decision (EPARegion 8): Silver Bow Creek/Butte Area, Warm Springs Pond Operable Unit, Silver Bow/Deer Lodge, Upper Clark Fork River Basin, MT., June 24, 1991

摘要

The Explanation of Significant Differences modifies certain elements of the WarmSprings Ponds remedy, as described in the Warm Springs Ponds Record of Decision (September 1990) (PB91-921528). The most significant aspect of the decision involves Pond 1 and the area below Pond 1. The Record of Decision specified that Pond 1 would be dry-closed, but a decision regarding the area below Pond 1 was deferred for one year. Because these areas have no role in the treatment of water entering the pond system from Silver Bow Creek, the decision has been made to separate them from the active portions (Ponds 2 and 3). Pond 1 and the area below will be the subject of a second and separate proposed plan, public review, and Record of Decision. This change, together with other minor and ancillary changes to the Warm Springs Ponds remedy, are described in detail.