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Record of Decision System (RODS)

VELSICOL CHEMICAL CORP. (MARSHALL PLANT)

Abstract

Site Name:  VELSICOL CHEMICAL CORP. (MARSHALL PLANT)
Address:  RTE 1 1MI N OF MARSHALL 
City & State:  MARSHALL  IL  62441
County:  CLARK
 
EPA ID:  ILD000814673
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-88/081
ROD Date:  09/30/1988
Operable Unit(s):  01
 
Media:  GROUND WATER SEDIMENTS SOIL SURFACE WATER
 
Contaminant:  ORGANICS, PAH, PESTICIDES, VOC (BENZENE)
 
Abstract:  THE VELSICOL CHEMICAL CORPORATION (VCC) IS A MANUFACTURING FACILITY LOCATED IN EAST-CENTRAL ILLINOIS, APPROXIMATELY ONE MILE NORTH OF THE CITY OF MARSHALL, CLARK COUNTY, ILLINOIS. THE SITE IS BORDERED BY A RAILROAD ON THE SOUTH AND BY AN UNNAMED TRIBUTARY ON THE SOUTHWEST. A TOTAL OF 334 ACRES ONSITE ARE LEASED FOR CROP FARMING. VCC WAS IN OPERATION BETWEEN THE MID-1930S AND AUGUST 1987, AND OCCUPIED AN AREA OF APPROXIMATELY 420 ACRES, 172 OF WHICH WERE USED FOR PRODUCTION OR DISPOSAL PRACTICES FOR PETROLEUM DERIVATIVES INCLUDING RESINS, SOLVENTS, AND PESTICIDES, INCLUDING CHLORDANE MANUFACTURING. ALL PROCESS WASTEWATER HAS BEEN DEEP-WELL INJECTED ONSITE SINCE 1965 AND THE MAJORITY OF THE WASTE SOLIDS AND SLUDGES GENERATED AT THE FACILITY WERE DISPOSED OF IN POND 5/6 UNTIL 1980 WHEN THE FIRM CEASED OPERATIONS. ACCIDENTAL AND INTENTIONAL OFFSITE RELEASES OF WASTES WERE NOTED DURING THE PERIOD THE PONDS WERE IN OPERATION. IN THE 1980S, ALL CONTAMINATED SOIL AND VISUALLY CONTAMINATED SEDIMENTS WERE CONSOLIDATED AND STABILIZED WITH CEMENT AND FLY ASH, AND COVERED WITH A TEMPORARY CLAY CAP AND VEGETATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, SEDIMENTS, SURFACE WATER AND GROUND WATER ARE VOCS INCLUDING BENZENE AND OTHER ORGANICS INCLUDING PAHS AND PESTICIDES.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES: EXCAVATION OF 10,200 YD(3) OF CONTAMINATED STREAM AND POND SEDIMENTS AND 87,900 YD(3) OF CONTAMINATED SOIL AND BACKFILLING WITH CLAY, AND REVEGETATION; AND CONSOLIDATION OF ALL EXCAVATED MATERIAL ONSITE WITH IN-PLACE STABILIZATION FOLLOWED BY CONSTRUCTION OF A RCRA CAP; CONSTRUCTION OF GROUND WATER COLLECTION DRAIN WITH DISPOSAL VIA ONSITE DEEP WELL INJECTION OR TREATMENT USING GRANULAR ACTIVATED CARBON PRIOR TO OFFSITE DISCHARGE; GROUND WATER AND SURFACE MONITORING; AND IMPLEMENTATION OF LAND USE AND DEED RESTRICTIONS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION INCLUDING O&M IS $9,080,910.
 
Remedy:  THE FINAL REMEDY AT THE VELSICOL CHEMICAL CORPORATION'S MARSHALL, ILLINOIS FACILITY CONSISTS OF THE FOLLOWING;
- EXCAVATE 24 INCHES OF CONTAMINATED SEDIMENTS IN THE UNNAMED TRIBUTARY BETWEEN THE PLANT SITE AND VELSICOL'S WESTERN PROPERTY BOUNDARY. ADDITIONAL SEGMENTS IN THE UNNAMED TRIBUTARY WILL BE EXCAVATED AS DETERMINED ON THE BASIS OF ADDITIONAL SAMPLING UNTIL BACKGROUND CONCENTRATIONS OF CHLORDANE ARE REACHED. THE ON-SITE SECTION OF THE
UNNAMED TRIBUTARY WILL BE BACKFILLED WITH CLAY AND REVEGETATED. A NEW DIVERSION CHANNEL WILL BE CONSTRUCTED.
- EXCAVATE CONTAMINATED PLANT PRODUCTION AREA SOILS TO PREDETERMINED DEPTHS, BACKFILL WITH CLEAN SOIL, REGRADE THE PLANT AREA TO PROVIDE EFFECTIVE SURFACE WATER DRAINAGE AND ESTABLISH A VEGETATED COVER OVER THE ENTIRE SITE.
- EXCAVATE SIX INCHES OF CONTAMINATED SEDIMENT FROM THE BASE AND SIDES OF THE 2 POND AND 4 POND, BACKFILL EACH IMPOUNDMENT WITH CLEAN SOIL, GRADE THE AREA TO PROVIDE SURFACE WATER DRAINAGE AND ESTABLISH A VEGETATED COVER. DECONTAMINATED DEBRIS FROM DECOMMISSIONING OF THE FACILITY WILL BE PLACED AND COMPACTED IN THE BOTTOM OF THESE PONDS.
- CONSOLIDATE ALL EXCAVATED MATERIAL FROM THE PLANT SITE, THE UNNAMED TRIBUTARY AND THE 2 POND AND 4 POND ON TOP OF THE 5/6 POND, TREAT THE EXCAVATED MATERIAL BY IN-PLACE CHEMICAL STABILIZATION, AND PROVIDE A RESOURCE AND CONSERVATION RECOVERY ACT (RCRA) COMPLIANT MULTIMEDIA CAP OVER THE REGRADED 5/6 POND.
- CONSTRUCT A GROUNDWATER COLLECTION DRAIN EAST OF THE 5/6 POND. DISPOSE OF EXTRACTED GROUNDWATER VIA THE ON-SITE DEEP INJECTION WELL, IN ACCORDANCE WITH THE TERMS OF THE CONSENT DECREE OR TREAT THE EXTRACTED GROUNDWATER TO ESTABLISHED CLEAN-UP OBJECTIVES USING PRIMARILY GRANULAR ACTIVATED CARBON PRIOR TO OFF-SITE DISCHARGE.
- MONITOR GROUNDWATER AND SURFACE COVER CONDITIONS. OPERATE AND MAINTAIN ALL REMEDIAL SYSTEMS.
- APPLY AND ENFORCE LAND USE AND DEED RESTRICTIONS IN ACCORDANCE WITH THE TERMS OF THE CONSENT DECREE.
 
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