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Record of Decision System (RODS)

MADISON METROPOLITAN SEWERAGE DISTRICT LAGOONS

Abstract

Site Name:  MADISON METROPOLITAN SEWERAGE DISTRICT LAGOONS
Address:  1610 MOORLAND RD 
City & State:  BLOOMING GROVE  WI  53713
County:  DANE
 
EPA ID:  WID078934403
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-97/156
ROD Date:  03/31/1997
Operable Unit(s):  01
 
Media:  Soil,sludge,sediments.
 
Contaminant:  Polychlorinated biphenyls (PCBs), aluminum, arsenic, barium, cadmium, chromium, cobalt, copper, iron, lead, magnesium, manganese, mercury, molybdenum, nickel, selenium, silver, vanadium, zinc, cyanide, acetone, carbon disulfide, 2-butanone, benzene, toluene, chlorobenzene, ethylbenzene, xylenes, 1,2-dichloroethene, 4,4-DDE, 4,4-DDD.
 
Abstract:  The Madison Metropolitan Sewerage District (MMSD) Lagoons site consists of two sludge lagoons that are located adjacent to the treatment plant facilities, south of the city of Madison, Wisconsin. The lagoons are referred to as Lagoon 1 and Lagoon 2. Lagoon 1 covers an area of approximately 52 acres and Lagoon 2 covers an approximate area of 86 acres. Wetlands, farms, parks, and open-space land exist immediately to the north, east, and south of the lagoons. Land use to the northwest of the lagoons is both commercial and industrial while to the west and southwest, land use is primarily residential.MMSD has operated the Nine Springs Wastewater Treatment Plant since 1933. In 1942, a 52-acre sludge lagoon was constructed by MMSD. This lagoon was constructed in a marsh area to the east of the Nine Springs Plant. By the mid-1960s, as Lagoon 1 began approaching its sludge capacity, MMSD constructed a second 86-acre lagoon to the east of Lagoon 1. In the 1970s, the contents of Lagoon 2 were release due to the collapse of one of the dikes. In 1991 through 1993, Lagoon 1 was cleaned out and closed; cleanout and closure of Lagoon 2 should begin in 1997. The site was placed on the National Priorities List in 1990.
 
Remedy:  This remedy addresses cleanup of sludge containing hazardous substances by installation of an in-place vegetative/soil cover in order to minimize potential exposure to lagoon sludge. The major components of the remedy include: construction of intra-lagoonal dikes; placement of geotextile layer and lightweight soil cover; seeding with appropriate vegetative growth; and continuation of institutional controls.
 
Text:  View full-text ROD [ 77K ]
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