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Record of Decision System (RODS)

ENVIROCHEM CORP.

Abstract

Site Name:  ENVIROCHEM CORP.
Address:  865 SOUTH STATE ROAD 421 
City & State:  ZIONSVILLE  IN  46077
County:  BOONE
 
EPA ID:  IND084259951
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Amendment
ROD ID:  EPA/AMD/R05-91/161
ROD Date:  06/07/1991
Operable Unit(s):  01
 
Media:  SOIL
 
Contaminant:  VOCS, PCE, TCE, TOLUENE, OTHER ORGANICS, PHENOLS
 
Abstract:  THE ENVIRO-CHEM SITE IS A FORMER WASTE RECOVERY/RECLAMATION/BROKERAGE FACILITY IN BOONE COUNTY, INDIANA. ADJACENT TO THE SITE IS ANOTHER SUPERFUND SITE, THE NORTHSIDE SANITARY LANDFILL (NSL) WHICH, PRIOR TO THIS RECORD OF DECISION (ROD) AMENDMENT, WAS TO BE REMEDIATED IN A COMBINED REMEDY FOR BOTH SITES. LAND USE IN THE AREA IS AGRICULTURAL TO THE SOUTH AND EAST, AND RESIDENTIAL TO THE NORTH AND WEST, WITH APPROXIMATELY 50 RESIDENCES LOCATED WITHIN ONE MILE OF THE SITES. RUNOFF FROM THE SITES IS COLLECTED IN A DITCH WHICH FLOWS OFFSITE AND EVENTUALLY EMPTIES INTO A RESERVOIR THAT PROVIDES APPROXIMATELY 6 PERCENT OF THE DRINKING WATER FOR THE CITY OF INDIANAPOLIS. ENVIRO-CHEM BEGAN OPERATIONS IN 1977 AS A RECOVERY/RECLAMATION/BROKERAGE FACILITY, ACCEPTING SOLVENTS, OILS AND OTHER WASTES FROM INDUSTRIAL CLIENTS. ACCUMULATION OF CONTAMINATED STORMWATER ONSITE, POOR MANAGEMENT OF THE DRUM INVENTORY, AND SEVERAL SPILLS LED TO STATE AND EPA INVESTIGATIONS OF THE SITE. BETWEEN 1977 AND 1981, THE STATE PERMITTED ENVIRO-CHEM TO DISPOSE OF PART OF ITS WASTE AT THE ADJACENT NSL. IN 1981, A CONSENT DECREE WAS ISSUED AGAINST ENVIRO-CHEM GIVING THEM UNTIL NOVEMBER 1982 TO COMPLY WITH ENVIRONMENTAL LAWS AND REGULATIONS. IN MAY 1982, THE STATE ORDERED ENVIRO-CHEM TO CLOSE AND ENVIRONMENTALLY SECURE THE SITE BECAUSE IT FAILED TO REDUCE HAZARDOUS WASTE INVENTORIES. SUBSEQUENTLY, TWO EMERGENCY REMOVAL ACTIONS WERE CONDUCTED TO REMOVE THE MAJOR SOURCES OF CONTAMINATION. FROM 1983 TO 1984, APPROXIMATELY 30,000 DRUMS, 220,000 GALLONS OF WASTE, AND 5,650 CUBIC YARDS OF SOIL AND SLUDGE WERE REMOVED OFFSITE AND TREATED. IN 1985, 20,000 GALLONS OF CONTAMINATED WATER WERE REMOVED. A 1987 ROD PROVIDED A COMBINED REMEDY FOR BOTH NSL AND ENVIRO-CHEM DUE TO THEIR PROXIMITY AND OTHER SIMILARITIES. THE 1987 ROD ADDRESSED SOURCE CONTROL THROUGH SOIL EXCAVATING, DEWATERING, AND ONSITE DISPOSAL, FOLLOWED BY CAPPING; PUMPING AND ONSITE TREATMENT OF GROUND WATER; AND IMPLEMENTING DEED AND ACCESS RESTRICTIONS. HOWEVER, SINCE THE SIGNING OF THE ROD, EPA AND THE STATE HAVE BEEN ENGAGED IN NEGOTIATING WITH THE PRPS FOR EACH SITE. THESE NEGOTIATIONS HAVE RESULTED IN SEPARATE, COMPLEMENTARY REMEDIES AND INDIVIDUAL CONSENT DECREES FOR EACH SITE, AND MODIFICATIONS TO THE ORIGINAL SELECTED REMEDY. THIS ROD AMENDS THE 1987 ROD AND PROVIDES A COMPREHENSIVE SITE REMEDY FOR THE ENVIRO-CHEM SITE ADDRESSING SOURCE CONTROL INSTEAD OF GROUND WATER REMEDIATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL ARE VOCS INCLUDING PCE, TCE, TOLUENE; AND OTHER ORGANICS INCLUDING PHENOLS.

THE AMENDED REMEDIAL ACTION FOR THIS SITE INCLUDES TREATING CONTAMINATED SOIL ONSITE USING SOIL VAPOR EXTRACTION WITH A GRANULATED ACTIVATED CARBON SYSTEM TO CONTROL THE EXTRACTED VAPOR, IF NECESSARY; AND IMPLEMENTING A CONTINGENT REMEDY FOR A SUBSURFACE GROUND WATER COLLECTION AND TREATMENT SYSTEM, BASED ON MONITORING RESULTS, IF CLEAN-UP OBJECTIVES ARE NOT REACHED IN 5 YEARS. OTHER REMEDIAL ACTIONS DOCUMENTED IN THE 1991 ROD AMENDMENT INCLUDE CAPPING THE SITE, IMPLEMENTING SITE ACCESS RESTRICTIONS, AND MONITORING OF THE SUBSURFACE AND SURFACE WATER ARE NOT AFFECTED BY THIS AMENDMENT. THE ESTIMATED PRESENT WORTH FOR THIS REMEDIAL ACTION RANGES BETWEEN $5,000,000 AND $9,000,000. NO O&M COSTS WERE PROVIDED FOR THIS REMEDIAL ACTION.

PERFORMANCE STANDARDS OR GOALS; SOIL CLEAN-UP GOALS ARE BASED ON INGESTION OF SUBSURFACE WATER AT THE SITE BOUNDARY, AND ARE CALCULATED FROM THE ACCEPTABLE SUBSURFACE WATER CONCENTRATIONS ASSUMING A DILUTION OF LEACHATE TO SUBSURFACE WATER OF 1:196, AND USING ESTABLISHED PARTITION COEFFICIENTS. CHEMICAL-SPECIFIC SOIL CLEAN-UP GOALS INCLUDE PHENOL 9,800 UG/KG, TCE 240 UG/KG, PCE 130 UG/KG, TOLUENE 238,000 UG/KG, AND TOTAL XYLENES 195,000 UG/KG.
 
Remedy:  THE PRIMARY REASON FOR AMENDING THE 1987 RECORD OF DECISION IS TO REFLECT THE DECISION TO IMPLEMENT SEPARATE, COMPLEMENTARY REMEDIES FOR THE ENVIRONMENTAL CONSERVATION AND CHEMICAL CORPORATION AND NORTHSIDE SANITARY LANDFILL SITES, INSTEAD OF THE ONE COMBINED REMEDY SELECTED IN THE 1987 RECORD OF DECISION, AND SECONDARILY, TO MODIFY THE SELECTED REMEDY. FOR THE ENVIRONMENTAL CONSERVATION AND CHEMICAL CORPORATION SITE,

THE MAJOR COMPONENTS OF THE REMEDIAL ACTION, AS MODIFIED, INCLUDE;
* SOIL VAPOR EXTRACTION, CONCENTRATION AND DESTRUCTION
* RCRA SUBTITLE C CAP
* ACCESS RESTRICTIONS
* SUBSURFACE AND SURFACE WATER MONITORING
* CONTINGENT SUBSURFACE WATER COLLECTION AND TREATMENT
 
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