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Record of Decision System (RODS)

SANGAMO ELECTRIC DUMP/CRAB ORCHARD NATIONAL WILDLIFE REFUGE (USDOI)

Abstract

Site Name:  SANGAMO ELECTRIC DUMP/CRAB ORCHARD NATIONAL WILDLIFE REFUGE (USDOI)
Address:  EAST OF STATE ROUTE 148 
City & State:  CARTERVILLE  IL  62959
County:  WILLIAMSON
 
EPA ID:  IL8143609487
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-90/124
ROD Date:  08/01/1990
Operable Unit(s):  02
 
Media:  SOIL SEDIMENT
 
Contaminant:  ORGANICS, PCBS, METALS, LEAD
 
Abstract:  THE SANGAMO/CRAB ORCHARD NWR (USDOI) SITE, IN THE CRAB ORCHARD NATIONAL WILDLIFE REFUGE, IS NEAR CARTERVILLE, ILLINOIS. WITHIN THE REFUGE, LAKES AND ADJACENT WETLANDS SUPPORT RECREATIONAL ACTIVITIES ON THE WESTERN PORTION OF THE REFUGE, WHILE THE EASTERN PORTION IS USED FOR MANUFACTURING PURPOSES. THE DEPARTMENT OF DEFENSE (DOD), THE ORIGINAL ADMINISTRATOR OF THE REFUGE, LEASED PORTIONS OF THE REFUGE TO MUNITIONS AND EXPLOSIVES MANUFACTURERS WHO CONTINUE TO OPERATE ONSITE. IN 1947 DOD TRANSFERRED THE ADMINISTRATION OF THE REFUGE TO THE DEPARTMENT OF THE INTERIOR (DOI). DOI ALSO LEASED PORTIONS OF THE REFUGE TO MANUFACTURERS OF PCB TRANSFORMERS AND CAPACITORS, AUTOMOBILE PARTS, FIBERGLASS BOATS, PLATED METAL PARTS, AND JET ENGINE STARTERS. SOLID WASTES GENERATED FROM THESE INDUSTRIAL ACTIVITIES WERE DISPOSED OF IN ONSITE LANDFILLS WHILE OTHER LIQUID WASTES MAY HAVE BEEN DISCHARGED INTO NEARBY SURFACE WATERS AND IMPOUNDMENTS. EPA HAS DIVIDED THE SITE INTO FOUR OPERABLE UNITS. THE FIRST OPERABLE UNIT, DOCUMENTED IN A MARCH 1990 RECORD OF DECISION (ROD), ADDRESSED THE METAL-CONTAMINATED AREAS. THE SECOND OPERABLE UNIT IS DOCUMENTED IN THIS ROD AND FOCUSES ON THE PCB-CONTAMINATED SOIL AND SEDIMENT IN FOUR SITES INCLUDING THE JOB CORPS LANDFILL (SITE 17), AN INACTIVE 1-ACRE LANDFILL CONTAINING 1,400 CUBIC YARDS OF CONTAMINATED MATERIAL; THE WATER TOWER LANDFILL (SITE 28), AN INACTIVE 1-ACRE LANDFILL CONTAINING 100 CUBIC YARDS OF CONTAMINATED MATERIAL; THE AREA 9 LANDFILL (SITE 32), AN INACTIVE 2.5-ACRE LANDFILL; AND THE AREA 9 BUILDING COMPLEX (SITE 33), WHERE CONTAMINATED RUNOFF FROM AN INDUSTRIAL BUILDING COMPLEX DISCHARGES INTO TWO DRAINAGE DITCHES. THE AREA 9 LANDFILL AND BUILDING COMPLEX TOGETHER CONTAIN 36,000 CUBIC YARDS OF CONTAMINATED MATERIAL. TWO ADDITIONAL OPERABLE UNITS WILL BE ADDRESSED IN A FUTURE ROD. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING SOIL AND SEDIMENT ARE ORGANICS INCLUDING PCBS AND METALS INCLUDING LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATION AND TREATMENT OF PCB-CONTAMINATED SOIL AND SEDIMENT USING INCINERATION OR IN-SITU VITRIFICATION (ISV), IF APPROPRIATE, AND STABILIZATION/FIXATION OF INCINERATION RESIDUES AND NON-INCINERATED, METAL-CONTAMINATED SOIL AND SEDIMENT, FOLLOWED BY ONSITE DISPOSAL IN A RCRA-PERMITTED LANDFILL; BACKFILLING, CAPPING, AND CLOSURE OF EXCAVATED AREAS AND AREAS WHERE CONTAMINATION IS BELOW THE EXCAVATION CRITERIA; ENVIRONMENTAL MONITORING INCLUDING GROUND WATER, SURFACE WATER, AND LEACHATE MONITORING; AND IMPLEMENTATION OF INSTITUTIONAL CONTROLS INCLUDING LAND USE AND TRANSFER RESTRICTIONS. ISV, AN INNOVATIVE TREATMENT TECHNOLOGY, WILL SUBSTITUTE FOR INCINERATION IF A SUCCESSFUL DEMONSTRATION OF THE TECHNOLOGY IS MADE. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $25,000,000, WHICH INCLUDES AN ANNUAL O&M COST OF $379,701 FOR 30 YEARS. IF ISV IS USED, THE ESTIMATED PRESENT WORTH COST OF THIS REMEDIAL ACTION WILL BE $17,080,215, WHICH INCLUDES AN ANNUAL O&M COST OF $201,800.

PERFORMANCE STANDARDS OR GOALS; SOIL AND SEDIMENT CONTAMINATED ABOVE THE ESTABLISHED REMEDIATION GOALS WILL BE EXCAVATED AND TREATED. SOIL REMEDIATION GOALS INCLUDE PCBS 1 MG/KG FOR THE TOP 12 INCHES OF SURFICIAL SOIL, PCBS 25 MG/KG FOR SOIL BELOW 12 INCHES, AND LEAD 450 MG/KG. SEDIMENT REMEDIATION GOALS INCLUDE PCBS 0.5 MG/KG. SOIL AND SEDIMENT REMEDIATION GOALS ARE BASED ON THE RISK ASSESSMENT, A (10-6) EXCESS CANCER RISK LEVEL, AND AN HI=1.
 
Remedy:  THIS OPERABLE UNIT IS THE SECOND OF SEVERAL PLANNED FOR THE SITE. THE REMEDY FOR THE SECOND OPERABLE UNIT ADDRESSES FOUR DISTINCT SITES WHICH CONTAIN SOIL AND SEDIMENT CONTAMINATED PRIMARILY WITH POLYCHLORINATED BIPHENYLS (PCBS) AND LEAD. A RECORD OF DECISION WAS ISSUED IN MARCH 1990 BY USEPA FOR A FIRST OPERABLE UNIT, CONSISTING OF THREE DISTINCT SITES PRIMARILY CONTAMINATED WITH METALS SUCH AS CADMIUM, CHROMIUM AND LEAD. THE REMEDY SELECTED FOR THE PCB AREAS OPERABLE UNIT ADDRESSES THE PRINCIPAL THREATS POSED BY THE SITES COMPRISING THE OPERABLE UNIT.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE;

* EXCAVATION OF CONTAMINATED SOIL AND SEDIMENT;
* TREATMENT OF ALL EXCAVATED SOIL AND SEDIMENT CONTAMINATED WITH PCBS IN EXCESS OF ESTABLISHED REMEDIATION GOALS USING MOBILE INCINERATION TECHNOLOGY, OR USING IN SITU VITRIFICATION (ISV) TECHNOLOGY, IF A DEMONSTRATION IS MADE THAT ISV CAN MEET OR EXCEED THE PERFORMANCE STANDARDS ESTABLISHED FOR INCINERATION TECHNOLOGY;
* STABILIZATION/FIXATION OF RESIDUES FROM INCINERATION AND NON- INCINERATED SOIL AND SEDIMENT CONTAMINATED WITH METALS (IF DETERMINED TO BE RCRA HAZARDOUS BECAUSE OF THEIR METALS LEACHABILITY), TO RENDER THEM NON-HAZARDOUS;
* ON-SITE DISPOSAL OF NON-RCRA HAZARDOUS STABILIZED/FIXED MATERIAL AND UNTREATED RESIDUES EXCEEDING THE CLEAN UP TARGETS IN A LANDFILL MEETING THE REQUIREMENTS OF RCRA SUBTITLE D AND 35 ILLNOIS ADMINISTRATIVE CODE PART 807;
* BACKFILLING, PLACEMENT OF LOW-PERMEABILITY CAPS AND CLOSURE OF AREAS WHERE CONTAMINATION IS BELOW THE EXCAVATION CRITERIA OR FROM WHERE CONTAMINATED SOIL AND SEDIMENT HAVE BEEN EXCAVATED;
* ENVIRONMENTAL MONITORING AND MAINTENANCE DURING AND AFTER REMEDIAL CONSTRUCTION TO ENSURE THE EFFECTIVENESS OF THE REMEDIAL ACTION.
 
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