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Record of Decision System (RODS)

ALLIED CHEMICAL & IRONTON COKE

Abstract

Site Name:  ALLIED CHEMICAL & IRONTON COKE
Address:  3330 S 3RD ST 
City & State:  IRONTON  OH  45638
County:  LAWRENCE
 
EPA ID:  OHD043730217
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-91/151
ROD Date:  12/28/1990
Operable Unit(s):  02
 
Media:  Groundwater, Sediments, Soil
 
Contaminant:  VOCS, BENZENE, OTHER ORGANICS, PAHS, PHENOLS, METALS, ARSENIC, CYANIDE
 
Abstract:  THE 95-ACRE ALLIED CHEMICAL AND IRONTON COKE SITE IS COMPRISED OF A FORMER COKE PLANT AND AN OPERATING TAR PLANT IN IRONTON, LAWRENCE COUNTY, OHIO. THE SITE IS LOCATED WITHIN A COAL MINING REGION, AND SURROUNDING LAND USE IS PREDOMINANTLY INDUSTRIAL AND RESIDENTIAL. THE OHIO RIVER, A SOURCE OF DRINKING WATER FOR THE CITY OF IRONTON, LIES APPROXIMATELY 500 FEET TO THE WEST OF THE TAR PLANT. ONSITE LAGOONS LIE WITHIN THE 100-YEAR FLOODPLAIN OF THE OHIO RIVER, WITH PORTIONS OF THE LAGOONS INUNDATED SUFFICIENTLY TO MAINTAIN WETLANDS VEGETATION. FROM APPROXIMATELY 1920 TO THE LATE 1960'S, WASTEWATER AND SOLID WASTES INCLUDING COKE AND COAL FINES, TANK CAR SLUDGE, BOILER ASH, AND WEAK AMMONIA LIQUOR WERE DISCHARGED INTO SWAMPY AREAS EAST OF THE COKE PLANT, WHICH ARE ADJACENT TO ICE CREEK, A TRIBUTARY TO THE OHIO RIVER. FROM THE EARLY 1970'S UNTIL THE COKE PLANT CLOSED IN 1982, A SERIES OF FOUR LAGOONS IN THE EASTERN AREA OF THE PLANT WERE USED TO TREAT PROCESS WASTEWATERS, STORMWATER RUN-OFF, AND WASTE SLUDGE; AND A FIFTH LAGOON WAS USED TO DISPOSE OF SOLID WASTE. TAR PLANT OPERATIONS BEGAN ONSITE IN 1945. TYPES OF WASTES GENERATED INCLUDED ANTHRACENE RESIDUES AND SALTS, COAL TAR PITCH SCRAP, AND PHTHALIC ANHYDRIDE RESIDUES, WHICH WERE DISPOSED OF ONSITE IN THE GOLDCAMP DISPOSAL AREA, A FORMER SAND PIT ADJOINING THE TAR PLANT. EXTENSIVE STUDIES AND ONSITE INVESTIGATIONS IDENTIFIED CONTAMINATION IN ONSITE SOIL IN THE COKE PLANT AND TAR PLANT AREAS, LAGOON SEDIMENT, ICE CREEK SEDIMENT DOWNSTREAM OF THE SITE, AND GROUND WATER BENEATH AND SURROUNDING THE SITE. A 1988 RECORD OF DECISION (ROD) ADDRESSED THE GOLD CAMP DISPOSAL AREA AND DOCUMENTED INSTALLATION OF A CAP AND SLURRY WALL, PUMPING AND TREATMENT OF CONTAMINATED GROUND WATER, AND PROVISIONS FOR SUPPLEMENTAL STUDY AND REMEDIATION OF NONAQUEOUS PHASE CONTAMINANTS FOUND ON TOP OF THE BEDROCK. THIS ROD ADDRESSES CONTAMINATION AT ALL AREAS NOT PREVIOUSLY ADDRESSED, AND PROVIDES A FINAL REMEDY AT THE SITE. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, SEDIMENT, AND GROUND WATER ARE VOCS INCLUDING BENZENE; OTHER ORGANICS INCLUDING PAHS AND PHENOLS; METALS INCLUDING ARSENIC; AND OTHER INORGANICS INCLUDING CYANIDE.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATING AND INCINERATING ONSITE APPROXIMATELY 122,000 CUBIC YARDS OF WASTE MATERIAL FROM LAGOON 5, AND 31,000 CUBIC YARDS OF WASTE COAL, FOLLOWED BY ONSITE WASTE FUEL RECOVERY (RE-USE OF THE WASTE HEAT GENERATED DURING INCINERATION), AND DISPOSING OF THE RESIDUAL ASH OFFSITE; IN-SITU BIOREMEDIATION OF APPROXIMATELY 475,000 CUBIC YARDS OF WASTE MATERIAL FROM LAGOONS 1 THROUGH 4, THE RESIDUAL SOIL OF LAGOON 5, AND THE ADJACENT INNER AND OUTER DIKES; EXCAVATING AND ONSITE BIOREMEDIATION ON A PREPARED PAD OF APPROXIMATELY 40,000 CUBIC YARDS OF SOIL FROM THE COKE AND TAR PLANT SOIL; PUMPING AND TREATMENT OF GROUND WATER AT A FUTURE SITE TREATMENT FACILITY, WITH ONSITE REINJECTION OR OFFSITE DISCHARGE; MONITORING GROUND WATER ONSITE AND DOWNGRADIENT OF ICE CREEK, AND DEVELOPING A CONTINGENCY PLAN IN THE EVENT THAT CONTAMINANT MIGRATION IS ENCOUNTERED; PILOT TESTING THE EFFECTIVENESS OF IN-SITU BIOREMEDIATION AND DEVELOPING A CONTINGENCY PLAN FOR AN ALTERNATIVE REMEDIAL ACTION FOR LAGOONS 1 THROUGH 4, IF NECESSARY; AND IMPLEMENTING INSTITUTIONAL CONTROLS INCLUDING DEED RESTRICTIONS, AND SITE ACCESS RESTRICTIONS SUCH AS FENCING. THE ESTIMATED CAPITAL COST FOR THIS REMEDIAL ACTION IS $21,000,000, WITH AN ESTIMATED TOTAL O&M COST OF $28,500,000. TOTAL ESTIMATED COST IS $49,500,000.

PERFORMANCE STANDARDS OR GOALS; THE WASTE FUEL RECOVERY SYSTEM SHALL BE DESIGNED AND OPERATED TO ACHIEVE A 99.99 PERCENT DESTRUCTION OF CARCINOGENIC PAHS. LAGOON 5 MATERIALS WILL BE EXCAVATED UNTIL EPA VISIBLY DETERMINES THAT NATURAL STREAM SEDIMENT HAS BEEN ENCOUNTERED. BIOREMEDIATION OF SOIL AND LAGOON SEDIMENT MUST REDUCE PAHS TO ATTAIN A CANCER RISK LEVEL OF (10-4) TO (10-6) AND AN HI LT 1. CHEMICAL-SPECIFIC LEVELS FOR BIOREMEDIATED SOIL INCLUDE PAHS 0.97 MG/KG AND ARSENIC 0.56 MG/KG. CHEMICAL-SPECIFIC GOALS FOR SOIL INCLUDE PAHS 1.4 MG/KG OF ORGANIC CARBON AND BENZENE 0.485 MG/KG OF ORGANIC CARBON. LEACH TESTS WILL BE PERFORMED ON THE TREATED WASTE MATERIALS TO DETERMINE THE CONCENTRATIONS OF ARSENIC AND CYANIDE THAT WILL BE PROTECTIVE OF THE GROUND WATER. GROUND WATER CLEAN-UP GOALS ARE BASED ON SITE-SPECIFIC RISK ASSESSMENT, MCLS, AND HEALTH ADVISORIES. CHEMICAL-SPECIFIC GROUND WATER GOALS INCLUDE BENZENE 0.005 MG/L, PHENOL 4 MG/L, TOTAL PAHS 0.005 MG/L, AND ARSENIC 0.05 MG/L.
 
Remedy:  THIS OPERABLE UNIT IS THE SECOND AND FINAL OF TWO OPERABLE UNITS FOR THE SITE. THE FIRST OPERABLE UNIT ADDRESSED THE GOLDCAMP DISPOSAL AREA, A FORMER SANDPIT WHICH HAS BEEN FILLED WITH WASTES. THE SELECTED REMEDY FOR THE FIRST OPERABLE UNIT INCLUDES INSTALLATION OF A CAP AND SLURRY WALL, PUMPING AND TREATMENT OF GROUNDWATER, AND THE SUPPLEMENTAL STUDY OF A LAYER OF NON-AQUEOUS PHASE SUBSTANCES (NAPS). THIS FINAL, SECOND OPERABLE UNIT REMEDY ADDRESSES GROUNDWATER AND SOIL CONTAMINATION BY REDUCING THE RISKS POSED BY THE SITE, THROUGH TREATMENT AND INSTITUTIONAL CONTROLS.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY FOR THE SECOND OPERABLE UNIT INCLUDE THE FOLLOWING;
* INCINERATION OF APPROXIMATELY 122,000 CUBIC YARDS (CY) OF LAGOON WASTE MATERIALS, AND ON-SITE RE-USE OF THE WASTE HEAT GENERATED DURING INCINERATION (WASTE FUEL RECOVERY),
* IN-SITU BIOREMEDIATION OF APPROXIMATELY 457,000 CY OF LAGOON WASTE MATERIAL,
* PREPARED-PAD SURFACE BIOREMEDIATION OF APPROXIMATELY 40,000 CY OF CONTAMINATED SOIL MATERIALS,
* PUMPING AND ON-SITE TREATMENT OF GROUNDWATER,
* MONITORING OF GROUNDWATER DOWNGRADIENT OF ICE CREEK AND PREPARATION OF A CONTINGENCY PLAN,
* FENCING, SECURITY, AND DEED RESTRICTIONS,
* EVALUATION OF THE EFFECTIVENESS OF IN-SITU BIOREMEDIATION, WITH A CONTINGENCY FOR DEVELOPMENT OF AN ALTERNATIVE
 
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