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Record of Decision System (RODS)

ORDNANCE WORKS DISPOSAL AREAS

Abstract

Site Name:  ORDNANCE WORKS DISPOSAL AREAS
Address:  1100 DUPONT RD 
City & State:  MORGANTOWN  WV  26505
County:  MONONGALIA
 
EPA ID:  WVD000850404
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-89/082
ROD Date:  09/29/1989
Operable Unit(s):  01
 
Media:  SOIL SEDIMENT
 
Contaminant:  PAHS, ARSENIC, LEAD
 
Abstract:  THE ORDNANCE WORKS DISPOSAL AREAS SITE IS ON THE WEST BANK OF THE MONANGAHELA RIVER IN MORGANTOWN, MONONGOLIA COUNTY, WEST VIRGINIA. SEVERAL CHEMICAL FACILITIES HAVE OPERATED AT THE SITE SINCE THE EARLY 1940S, PRODUCING SUBSTANCES SUCH AS HEXAMINE, AMMONIA, METHYL ALCOHOL, FORMALDEHYDE, ETHYLENE DIAMINE AND COKE. THIS OPERABLE UNIT ADDRESSES ONSITE CONTAMINATION FOUND IN THE FOLLOWING AREAS: AN INACTIVE LANDFILL WHERE SOLID AND CHEMICAL WASTES WERE DISPOSED OF; A SCRAPED AREA WHICH CONSISTS OF BARE SOIL ADJACENT TO THE LANDFILL WHERE SOLID WASTES WERE BURIED; TWO FORMER LAGOON AREAS WHICH WERE CLOSED FOLLOWING A CLEANUP ACTION IN 1976; AND SEVERAL STREAMS LOCATED IN THE SOUTHERN PORTION OF THE SITE. THIS RECORD OF DECISION (ROD) SUPERSEDES A 1988 ROD WHICH WAS RESCINDED AFTER PUBLIC COMMENTS PROMPTED FURTHER INVESTIGATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL AND SEDIMENT ARE CARCINOGENIC PAHS, AND METALS INCLUDING ARSENIC AND LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATION AND ONSITE TREATMENT OF APPROXIMATELY 425 CUBIC YARDS OF INORGANIC CONTAMINATED SOIL FROM HOT SPOTS IN THE SCRAPED AREA AND LAGOON AREA USING SOLIDIFICATION, FOLLOWED BY PLACEMENT OF THE TREATED SOIL IN THE LANDFILL BEFORE CAPPING; INSTALLING A MULTIMEDIA RCRA SUBTITLE C CAP ON THE LANDFILL AND REGRADING AND REVEGETATION; EXCAVATING APPROXIMATELY 13,460 CUBIC YARDS OF ORGANIC- CONTAMINATED SOIL AND SEDIMENT FROM THE LAGOON AREA, SCRAPED AREA, AND STREAMS, WITH ONSITE TREATMENT BY BIOREMEDIATION IN A TREATMENT BED; GROUND WATER, SURFACE WATER, AND SEDIMENT MONITORING; AND IMPLEMENTING DEED RESTRICTIONS TO PROHIBIT RESIDENTIAL AND INDUSTRIAL CONSTRUCTION AT THE SITE. A CONTINGENCY REMEDY HAS BEEN SELECTED WHICH WOULD INCLUDE SOIL WASHING OF CONTAMINATED SOIL AS THE PRINCIPAL TREATMENT. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $8,332,000, WHICH INCLUDES ANNUAL O&M COSTS OF $88,200 FOR 4 TO 10 YEARS.
 
Remedy:  EPA HAS SELECTED, AND THE STATE OF WEST VIRGINIA HAS CONCURRED IN THE SELECTION OF, A PREFERRED REMEDIAL ACTION AND CONTINGENCY REMEDIAL ACTION FOR OPERABLE UNIT NO. 1 OF THE ORDNANCE WORKS DISPOSAL AREAS SITE FROM AMONG THE ALTERNATIVES CONSIDERED IN THE FOCUSED FEASIBILITY STUDY. BOTH THE PREFERRED REMEDIAL ACTION AND CONTINGENCY REMEDIAL ACTION ARE CONSIDERED COMPARABLE IN REMEDIATING CONTAMINATION AND REDUCING RISKS ASSOCIATED WITH EXPOSURE TO CONTAMINATED MATERIALS PRESENT WITHIN OPERABLE UNIT NO. 1.

THE MAJOR COMPONENTS OF THE PREFERRED REMEDIAL ACTION AND CONTINGENCY REMEDIAL ACTION ARE AS FOLLOWS: PREFERRED REMEDIAL ACTION: ALTERNATIVE 8B

* INSTALLATION OF A MULTI-MEDIA RCRA SUBTITLE C CAP ON THE LANDFILL AND REGRADING/REVEGETATION TO CONTROL SURFACE RUN-ON AND RUN-OFF.
* EXCAVATION OF CONTAMINATED INORGANIC HOT SPOTS EXCEEDING RISK-BASED CLEANUP LEVELS FROM THE LAGOON AREA AND SCRAPED AREA BEFORE BIOREMEDIATION.
* ONSITE TREATMENT OF SOILS EXCAVATED FROM INORGANIC HOT SPOTS USING SOLIDIFICATION AND PLACEMENT OF NON-HAZARDOUS TREATED MATERIAL IN THE LANDFILL BEFORE CAPPING.
* EXCAVATION OF ORGANIC CONTAMINATED SOILS AND SEDIMENTS EXCEEDING RISK-BASED CLEANUP LEVELS FROM THE SCRAPED AREA, LAGOON AREA, AND STREAMS.
* TREATMENT OF EXCAVATED SOILS AND SEDIMENTS WITH ORGANIC CONTAMINANTS USING BIOREMEDIATION IN A TREATMENT BED WITHIN THE ASSOCIATED AREA OF CONTAMINATION.
* SHORT-TERM ENVIRONMENTAL MONITORING TO ENSURE THE EFFECTIVENESS OF THE REMEDIAL ACTION.
* GROUNDWATER MONITORING IN THE IMMEDIATE VICINITY OF THE LANDFILL.
* DEED RESTRICTIONS TO PROHIBIT RESIDENTIAL AND INDUSTRIAL CONSTRUCTION IN THE LANDFILL AREA AND RESIDENTIAL CONSTRUCTION IN THE REMAINING AREAS.

CONTINGENCY REMEDIAL ACTION: ALTERNATIVE 6

* INSTALLATION OF A MULTI-MEDIA RCRA SUBTITLE C CAP ON THE LANDFILL AND REGRADING/REVEGETATING TO CONTROL SURFACE RUN-ON AND RUN-OFF.
* EXCAVATION OF CONTAMINATED SOILS AND SEDIMENTS EXCEEDING RISK-BASED CLEANUP LEVELS IN THE SCRAPED AREA, LAGOON AREA, AND STREAMS.
* ONSITE TREATMENT OF EXCAVATED SOILS AND SEDIMENTS USING SOIL WASHING. EXCAVATED AREAS WILL BE BACKFILLED WITH REMEDIATED NON-HAZARDOUS SOILS, REGRADED, AND VEGETATED.
* SHORT-TERM ENVIRONMENTAL MONITORING TO ENSURE THE EFFECTIVENESS OF THE REMEDIAL ACTION.
* GROUNDWATER MONITORING IN THE IMMEDIATE VICINITY OF THE LANDFILL AREA.
* DEED RESTRICTIONS TO PROHIBIT INDUSTRIAL AND RESIDENTIAL CONSTRUCTION IN THE LANDFILL AREA AND RESIDENTIAL CONSTRUCTION IN REMAINING AREAS.

CONDITIONS TRIGGERING IMPLEMENTATION OF CONTINGENCY REMEDIAL ACTION THE PREFERRED REMEDIAL ACTION SELECTED BY EPA FOR IMPLEMENTATION AT OPERABLE UNIT NO. 1 IS ALTERNATIVE 8B. IF, HOWEVER:

1. PREDESIGN STUDIES SHOW THAT TREATMENT LEVELS SPECIFIED IN THE ROD CANNOT BE ACHIEVED USING BIOREMEDIATION TECHNIQUES WITHIN A REASONABLE TIME FRAME; OR
2. RESPONSIBLE PARTIES ELECT TO DESIGN, IMPLEMENT, AND FINANCE ALTERNATIVE NO. 6 AT OPERABLE UNIT NO. 1; OR
3. INFORMATION RECEIVED DURING THE BIDDING PROCESS SUGGESTS THAT THE COSTS OF IMPLEMENTING ALTERNATIVE NO. 8B ARE SIGNIFICANTLY HIGHER THAN ORIGINALLY ESTIMATED; THEN ALTERNATIVE NO. 6, THE CONTINGENCY REMEDIAL ACTION, SHALL BE THE REMEDIAL ACTION SELECTED BY EPA FOR IMPLEMENTATION AT OPERABLE UNIT NO. 1 OF THE ORDNANCE WORKS DISPOSAL AREAS SITE.
 
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