Jump to main content.


Local Navigation


Record of Decision System (RODS)

MASTER DISPOSAL SERVICE LANDFILL

Abstract

Site Name:  MASTER DISPOSAL SERVICE LANDFILL
Address:  SW1/4 OF SW1/4 SEC5 T7N R20E 
City & State:  BROOKFIELD  WI  53005
County:  WAUKESHA
 
EPA ID:  WID980820070
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-90/146
ROD Date:  09/26/1990
Operable Unit(s):  01
 
Media:  SOIL DEBRIS GROUND WATER
 
Contaminant:  VOCS, BENZENE, TCE, TOLUENE, XYLENES, METALS, ARSENIC, CHROMIUM, LEAD
 
Abstract:  THE 26-ACRE MASTER DISPOSAL SERVICE LANDFILL SITE IS AN INACTIVE INDUSTRIAL LANDFILL IN THE TOWN OF BROOKFIELD, WAUKESHA COUNTY, WISCONSIN. THE SITE LIES WITHIN THE MARSHY FLOODPLAIN OF THE FOX RIVER AND IS PARTIALLY SURROUNDED BY WETLANDS AND DRAINAGE CHANNELS. THE SITE OVERLIES A SURFICIAL SAND/GRAVEL AND DOLOMITE AQUIFER SYSTEM, WHICH HAS BEEN CONTAMINATED BY ONSITE DISPOSAL ACTIVITIES. ONSITE DISPOSAL OF MAINLY INDUSTRIAL FOUNDRY SANDS AND SLAGS OCCURRED BETWEEN 1967 AND 1982. ONSITE DISPOSAL OF HAZARDOUS WASTES INCLUDING INKS, SLUDGES, AND SOLVENTS WAS ALSO OBSERVED DURING THIS PERIOD. THE SITE WAS PARTIALLY CLOSED IN 1982, BUT CONTROLLED BURNING OF WOOD WASTE CONTINUED UNTIL 1985 WHEN THE SITE WAS PERMANENTLY CLOSED. INVESTIGATIONS COMPLETED IN 1990 IDENTIFIED NEGATIVE IMPACTS ON SURFACE WATER AND GROUND WATER FROM THE LANDFILL SOURCES. THIS RECORD OF DECISION (ROD) ADDRESSES SOURCE CONTROL AS A FINAL REMEDY AND MANAGEMENT OF MIGRATION OF GROUND WATER AS AN INTERIM REMEDY. A SUBSEQUENT ROD WILL ADDRESS THE FINAL RESTORATION OF THE SURFICIAL AQUIFER SYSTEM. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, DEBRIS, AND GROUND WATER ARE VOCS INCLUDING BENZENE, TCE, TOLUENE, AND XYLENES; AND METALS INCLUDING ARSENIC, CHROMIUM, AND LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES CAPPING THE LANDFILL WITH A CLAY/SOIL CAP AND SOIL COVER; INSTALLING AN ACTIVE LANDFILL GAS VENTING SYSTEM; PUMPING AND TREATMENT OF GROUND WATER IN THE SURFICIAL AQUIFER SYSTEM USING FILTRATION AND EITHER AIR STRIPPING, CARBON ADSORPTION, ION EXCHANGE OR CHEMICAL TREATMENT, BASED ON THE RESULTS OF TREATABILITY STUDIES; DISCHARGING THE TREATED WATER ONSITE TO SURFACE WATER; RESTORING OR MITIGATING ANY WETLANDS IMPACTED BY THIS REMEDIAL ACTION; CONDUCTING LONG TERM SURFACE WATER AND GROUND WATER MONITORING; AND IMPLEMENTING INSTITUTIONAL CONTROLS INCLUDING DEED, LAND USE AND GROUND WATER USE RESTRICTIONS, AND SITE ACCESS RESTRICTIONS SUCH AS FENCING. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION RANGES FROM $4,632,000 TO $5,016,000, WHICH INCLUDES AN ANNUAL O&M COST RANGING FROM $142,730 TO $164,130 FOR 30 YEARS, DEPENDING UPON THE SELECTED GROUND WATER TREATMENT.

PERFORMANCE STANDARDS OR GOALS: EFFLUENT DISCHARGE LIMITATIONS FOR TREATED GROUND WATER WERE CALCULATED FROM STATE DISCHARGE STATUTES, AND SPECIFY WEEKLY AVERAGES FOR METAL CONTAMINANTS AND MONTHLY AVERAGES FOR VOCS, AS WELL AS MAXIMUM CONCENTRATION LEVELS. CHEMICAL-SPECIFIC GOALS INCLUDE BENZENE 8.5 LBS/DAY, TCE 22 LBS/DAY, TOLUENE (DAILY CONCENTRATION LEVEL) 17 MG/L, ARSENIC 0.045 LBS/DAY, CHROMIUM (TOTAL) 0.034 LBS/DAY, AND LEAD 0.0096 LBS/DAY.
 
Remedy:  THIS REMEDY IS THE FIRST OPERABLE UNIT FOR THE MDSL SITE AND CONSISTS OF A REMEDY FOR THE WASTE MASS AND AN INTERIM ACTION FOR CONTAMINATED GROUNDWATER. CAPPING OF THE WASTE MASS IN CONJUNCTION WITH CONTAINMENT OF CONTAMINATED GROUNDWATER IS CONSIDERED AS SOURCE CONTROL, BOTH COMPONENTS ARE NECESSARY SINCE THE GROUNDWATER APPEARS TO BE IN CONTACT WITH THE WASTE MASS. THUS, "CONTAINMENT" WILL NOT BE ACHIEVED THROUGH SOLELY CAPPING THE SITE. A SECOND AND FINAL REMEDY WILL BE IMPLEMENTED FOR GROUNDWATER, SURFACE WATER AND WETLANDS. THE COMBINATION OF A CLAY/SOIL CAP WITH AN ACTIVE LANDFILL GAS VENTING SYSTEM AND A GROUNDWATER EXTRACTION SYSTEM WITH CAPABILITY FOR BOTH ORGANIC AND INORGANIC POLLUTANT REMOVAL FOLLOWED BY STREAM DISCHARGE CONSTITUTES THE FIRST REMEDY FOR THE SITE.

THE PRIMARY GOALS OF THE REMEDIAL ACTIONS AT THE MDSL SITE ARE;

* TO REDUCE INFILTRATION INTO THE LANDFILL WHICH IS A SOURCE OF GROUNDWATER CONTAMINATION AND TO REDUCE THE RISKS ASSOCIATED WITH EXPOSURE TO CONTAMINATED MATERIALS; AND
* TO CONTAIN KNOWN CONTAMINATED GROUNDWATER IN THE SURFICIAL AQUIFER.

THE MDSL REMEDIAL INVESTIGATION IDENTIFIED CONTAMINATED GROUNDWATER AS THE PRINCIPAL THREAT, WITH THE WASTE MATERIALS ACTING AS THE SOURCE OF THAT CONTAMINATION DUE TO INFILTRATION AND THE PROBABLE CONTACT BETWEEN PORTIONS OF THE WASTE MASS AND THE GROUNDWATER.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY CONSIST OF;

* PLACEMENT OF A CLAY/SOIL CAP AND AN ACTIVE VENTING SYSTEM OVER THE FILL MATERIAL TO REDUCE INFILTRATION INTO THE WASTE MASS. (CONSTRUCTED IN ACCORDANCE WITH NR 504.07 AND NR 506.08 WIS. ADM. CODE).
* INSTALLATION OF A GROUNDWATER EXTRACTION AND TREATMENT SYSTEM TO REMOVE BOTH ORGANIC AND INORGANIC CONTAMINATION FROM A PORTION OF THE CONTAMINATED ALLUVIUM AQUIFER GROUNDWATER BENEATH THE SITE.
* CONDUCT GROUNDWATER, SURFACE WATER, WATER BUDGET/HYDROLOGY AND WETLAND MONITORING TO ASSESS THE QUALITY AND QUANTITY OF AREA GROUNDWATER, SURFACE WATER AND WETLANDS.
* IMPOSE ACCESS AND USE RESTRICTIONS.
 
Text:  View full-text ROD [ 50K ]
To download a full-text ROD, right click on the above link and select Save Link As. A full-text ROD is in PDF format. Please note that download time may be extended given the size of the full-text document. File size is noted in kilobytes (K) or megabytes (M) next to the download link.
About Adobe Portable Document Format
 
Return to Search Results   

OSWER Home | Superfund Home


Jump to main content.