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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/R03-88/042
ROD Date:  03/31/1988
Operable Unit(s):  01
 
Media:  SEDIMENTS SOIL
 
Contaminant:  INORGANICS (ARSENIC), ORGANICS (PAHS, PCBS)
 
Abstract:  THE ORDNANCE WORKS DISPOSAL SITE, ALSO KNOWN AS THE MORGANTOWN ORDNANCE WORKS, IS LOCATED ONE MILE SOUTH OF MORGANTOWN, WEST VIRGINIA. THE MONONGAHELA RIVER IS ADJACENT TO THE SITE WITH A FAIRLY STEEP CLIFF SEPARATING THE RIVER FROM PORTIONS OF THE SITE. REMEDIATION FOR THIS FIRST OPERABLE UNIT FOCUSES ON THE WASTE DISPOSAL AREA WHICH CONSISTS OF AN INACTIVE LANDFILL, TWO FORMER LAGOONS AND THE SURROUNDING IMPACTED AREA, AND A SCRAPED AREA OF BARE SOIL. THESE AREAS ARE LOCATED WITHIN AN INDUSTRIAL TRACT OF OVER 800 ACRES OF WHICH 670 ACRES ARE OWNED BY MORGANTOWN INDUSTRIAL PARK ASSOCIATION, A GROUP OF PRIVATE INDIVIDUALS WHO JOINED TOGETHER TO PURCHASE THE ORDNANCE WORKS PROPERTY IN 1982. PRIOR TO THIS, THE SITE WAS OWNED BY NUMEROUS COMPANIES AND USED FOR A VARIETY OF CHEMICAL PRODUCTION OPERATIONS. THE LANDFILL COVERS A SURFACE AREA OF APPROXIMATELY 1.6 ACRES. THE LANDFILL WAS REPORTEDLY USED FROM 1942 UNTIL 1962, FOR THE DISPOSAL OF VARIOUS SOLID CHEMICAL WASTES. WASTE MATERIALS IDENTIFIED INCLUDED; CONSTRUCTION DEBRIS, SLAG, ASH, AND CATALYST PILLETS. ARSENIC AND CARCINOGENIC PAHS (CPAHS) WERE DETECTED IN THE SOILS AT CONCENTRATIONS EXCEEDING RISK-BASED CLEANUP LEVELS. THE FORMER LAGOON AND THE SURROUNDING AREA, LOCATED ADJACENT TO THE LANDFILL, COVER A SURFACE AREA OF 3 TO 4 ACRES. THIS AREA IS RELATIVELY FLAT WITH A CINDER-LIKE SURFACE LAYER AND SPARSE VEGETATION. METAL PLATING WASTES WERE PLACED IN THE LAGOON BETWEEN 1970 AND 1976. THE LAGOONS WERE EXCAVATED IN 1981, BY THE RESPONSIBLE PARTY, AND THE CONTENTS WERE DISPOSED OF OFFSITE. THE METALS PRESENT IN THE SOIL ARE CURRENTLY BELOW THE RECOMMENDED CLEANUP LEVELS. CPAHS HAVE BEEN IDENTIFIED AT LEVELS EXCEEDING CLEANUP STANDARDS IN THE AREA ADJACENT TO THE LAGOONS. AN OILY, STAINED CINDER MATERIAL WAS OBSERVED IN AREAS WHERE CPAHS WERE DETECTED. THE SCRAPED AREA, CARVING A SURFACE AREA OF APPROXIMATELY 162 ACRES, WAS AN ACTIVE DISPOSAL AREA FOR SOLID WASTES FROM 1942 UNTIL 1962. THE WASTE MATERIALS IDENTIFIED INCLUDE; CONSTRUCTION DEBRIS, OIL-LIKE STAINED SOILS, AND CATALYST PILLETS. CURRENTLY, ARSENIC AND CPAHS EXCEED THE PROPOSED CLEANUP LEVELS. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL AND SEDIMENTS INCLUDE ARSENIC AND CPAHS.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES; CONSOLIDATION OF EXISTING LANDFILL WASTE AND APPLICATION OF A MULTI-LAYER RCRA CAP; EXCAVATION AND ONSITE INCINERATION OF FORMER LAGOONS AND SURROUNDING AREA, SCRAPED AREA SOIL, AND IMPACTED STREAM SEDIMENTS WITH ONSITE DISPOSAL OF TREATMENT RESIDUALS IN THE LANDFILL PRIOR TO THE INSTALLATION OF THE CAP (ASSUMING THE ASH IS NOT EP TOXIC); PLACEMENT OF CLEAN FILL IN THE EXCAVATED AREA, FOLLOWED BY GRADING AND REVEGETATION; IMPLEMENTATION OF SURFACE MANAGEMENT TECHNIQUES FOR DRAINAGE AND SEDIMENT CONTROL IN THE LANDFILL AREA; AMBIENT AIR MONITORING; AND POST-TREATMENT MONITORING. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $6,718,000.
 
Remedy:  OPERABLE UNIT ONE CONSISTS OF AN INACTIVE LANDFILL, TWO FORMER LAGOONS, AN AREA OF BARE SOIL WHERE WASTES WERE DEPOSITED (SCRAPED AREA), AND A FORMER DRUM STAGING AREA. OPERABLE UNIT TWO WILL FOCUS ON THE DEPARTMENT OF DEFENSE INDUSTRIAL AREA FOR WHICH ONLY PRELIMINARY INFORMATION IS PRESENTLY AVAILABLE.

THE SELECTED REMEDY, ON-SITE INCINERATION AND CONTAINMENT, IS DESIGNED TO TREAT, VIA INCINERATION, SOILS OF CONCERN FOUND IN THE SCRAPED AREA AND FORMER LAGOON AREA, ALONG WITH SEDIMENTS FROM THE THREE STREAMS THAT ARE LOCATED DOWNGRADIENT OF THE AREAS OF CONCERN. THE INCINERATION PROCESS WILL BE CONDUCTED ON-SITE WITH A MOBILE INCINERATOR THAT WILL PERMANENTLY DESTROY THE ORGANIC CONTAMINANTS. THE ASH GENERATED FROM THE INCINERATION PROCESS WILL BE TESTED FOR EP TOXICITY. BASED ON THE LEVEL OF INORGANICS PRESENT IN THE SOIL AND SEDIMENTS, IT IS ANTICIPATED THAT THE ASH WILL NOT BE EP TOXIC AND THEREFORE, MAY BE DISPOSED IN THE ON-SITE INACTIVE LANDFILL. ASH THAT TESTS POSITIVE FOR EP TOXICITY WILL BE DISPOSED AT AN OFF-SITE RCRA FACILITY.

THE SELECTED REMEDY ALSO INCLUDES THE PLACEMENT OF A MULTI-LAYER RCRA CAP ON THE INACTIVE LANDFILL. THE CAP WILL BE EXTENDED INTO THE SUBSURFACE CLAY TO PREVENT SURFACE WATER FROM INFILTRATING INTO THE LANDFILL AND LEACHATE FROM SEEPING OUT OF THE LANDFILL.

OTHER ACTIONS INCLUDE PLACEMENT OF CLEAN FILL IN THE EXCAVATED AREAS, SURFACE MANAGEMENT TECHNIQUES FOR DRAINAGE AND SEDIMENT CONTROL, REVEGETATION, AMBIENT AIR MONITORING AND POST-TREATMENT MONITORING.
 
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