LINE 3A SEWAGE TREATMENT PLANT/DRYING BEDS

 

SITE DESCRIPTION

This permitted site is located in the western portion of the installation and is the treatment plant and drying bed for Line 3A. Line 3A has its own treatment plant due to its reclusive location on the installation. The Sewage Treatment Plant (STP) encompasses about one-half acre and consists of an Imhoff tank, a trickling filter, clarifier, chlorine contact chamber and sludge drying beds. The drying beds are lined with two feet of sand. The plant has been operational from 1943 to 1945, then from 1949 to the present. Wastewater treated here was domestic waste and blow down water from boilers at the steam generating plant near Line 3A.

The PA/SI was completed in 1991, the RI was completed in May 1996. Significant levels of explosives were found in the outfall and downstream surface water.

Samples were collected from the outfalls in October 2000.  These samples showed slighly elevated levels of RDX, HMX and TNT.

This site was transferred to the Compliance Cleanup Program and is considered Response Complete by the IRP.