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Record of Decision System (RODS)

CLIFF/DOW DUMP

Abstract

Site Name:  CLIFF/DOW DUMP
Address:  CO RD 550 1/2MI N DEAD RIV 
City & State:  MARQUETTE  MI  49855
County:  MARQUETTE
 
EPA ID:  MID980608970
EPA Region:  05
 
NPL Status:  Deleted from the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-89/100
ROD Date:  09/27/1989
Operable Unit(s):  01
 
Media:  SOIL GROUNDWATER
 
Contaminant:  VOCS, BENZENE, TOLUENE, PCE, XYLENES, PHENOL
 
Abstract:  THE MUNICIPALLY OWNED 2-ACRE CLIFF/DOW DUMP SITE IS IN A WOODED RECREATIONAL AREA ADJACENT TO THE DEAD RIVER IN MARQUETTE, MICHIGAN. FROM 1954 UNTIL THE EARLY 1960S WASTES GENERATED BY THE CLIFFS-DOW CHEMICAL COMPANY'S CHARCOAL MANUFACTURING PLANT WERE DEPOSITED AT THE SITE. THE WASTES, WHICH INCLUDED TAR AND TAR-CONTAMINATED FILL MATERIALS, WERE DEPOSITED TO FILL A SMALL BOG DEPRESSION. THE 200 CUBIC YARDS OF EXPOSED TAR DEPOSITS ARE THE PRIMARY SOURCE OF CONTAMINATION IN THE SOIL; HOWEVER, THE REMAINING 9,400 CUBIC YARDS OF FILL MATERIAL CONTAINING CHARCOAL AND WOOD INTERMINGLED WITH APPROXIMATELY 200 CUBIC YARDS OF TAR, ARE ALSO A CONTAMINATION SOURCE. RESULTS OF PILOT STUDIES INDICATE THAT GROUND WATER IS UNDERGOING IN SITU BIODEGRADATION AS IT FLOWS DOWNGRADIENT OF THE FILL AND POSES NO RISK TO HUMAN HEALTH OR THE ENVIRONMENT. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL ARE VOCS INCLUDING BENZENE, TOLUENE, PCE, AND XYLENES; AND OTHER ORGANICS INCLUDING PAHS AND PHENOL.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATION AND OFFSITE INCINERATION OF 200 CUBIC YARDS OF EXPOSED TARS; EXCAVATION OF 9,400 CUBIC YARDS OF FILL MATERIAL INTERMINGLED WITH TARS, AND SEGREGATION FOLLOWED BY OFFSITE INCINERATION OF 200 CUBIC YARDS OF BURIED TARS ENCOUNTERED DURING THE EXCAVATION; FORCED AERATION BIOLOGICAL TREATMENT OF THE 9,200 CUBIC YARDS OF RESIDUAL CONTAMINATED FILL MATERIAL AFTER REPLACEMENT IN THE EXCAVATED AREA; INSTALLING A SOIL COVER AND REVEGETATION OF BIOREMEDIATED FILL AREA; IMPLEMENTATION OF INSTITUTIONAL CONTROLS INCLUDING DEED RESTRICTIONS PREVENTING NEW WELL INSTALLATION AND DISTURBANCE OF FILL MATERIAL UNTIL HEALTH-BASED GOALS HAVE BEEN ACHIEVED; AND GROUND WATER AND AIR MONITORING. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $2,842,165, WHICH INCLUDES ESTIMATED ANNUAL O&M COSTS OF $63,280.
 
Remedy:  THE SELECTED REMEDIAL ACTION FOR THE CLIFFS-DOW DISPOSAL SITE ADDRESSES THE SOURCE OF THE CONTAMINATION BY REMEDIATION OF ON-SITE WASTES AND RESIDUAL CONTAMINATED FILL MATERIAL. THE MAJOR COMPONENTS OF THE SELECTED REMEDIAL ACTION INCLUDE;

* EXCAVATION AND TREATMENT, VIA INCINERATION, OF APPROXIMATELY 200 CUBIC YARDS OF TAR.
* EXCAVATION, SEGREGATION AND TREATMENT, VIA INCINERATION, OF APPROXIMATELY 200 CUBIC YARDS OF BURIED TAR.
* EXCAVATION AND TREATMENT, VIA ENHANCED BIOLOGICAL TREATMENT OF APPROXIMATELY 9,200 CUBIC YARDS OF RESIDUAL CONTAMINATED FILL MATERIAL.
* TOPSOIL COVER AND REVEGETATION OF BIOREMEDIATED FILL AREA.
* SITE DEED RESTRICTIONS THAT PREVENT INSTALLATION OF DRINKING WATER WELLS WITHIN THE VICINITY OF THE CONTAMINATED GROUNDWATER BOUNDARIES AND DISTURBANCE OF FILL MATERIAL UNTIL HEALTH BASED REMEDIAL ACTION GOALS HAVE BEEN ACHIEVED.
* GROUNDWATER/AIR MONITORING PROGRAM TO CONFIRM THE ADEQUACY OF ENHANCED BIOLOGICAL TREATMENT OF RESIDUAL CONTAMINATED FILL MATERIAL AND IN-SITU BIOREMEDIATION OF RESIDUAL GROUNDWATER CONTAMINATION.
 
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