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Record of Decision System (RODS)

GREENWOOD CHEMICAL CO.

Abstract

Site Name:  GREENWOOD CHEMICAL CO.
Address:  PO BOX 26 OFF STATE RTE 690 
City & State:  NEWTOWN  VA  22943
County:  ALBEMARLE
 
EPA ID:  VAD003125374
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-91/117
ROD Date:  12/31/1990
Operable Unit(s):  02
 
Media:  GROUNDWATER SURFACE WATER
 
Contaminant:  VOCS, BENZENE, PCE, TCE, TOLUENE, SVOCS, NAPHTHALENE, METALS, ARSENIC
 
Abstract:  THE 5-ACRE GREENWOOD CHEMICAL SITE IS A FORMER CHEMICAL MANUFACTURING FACILITY IN NEWTOWN, ALBEMARLE COUNTY, VIRGINIA. LAND USE IN THE AREA IS MIXED RESIDENTIAL AND AGRICULTURAL. ONSITE FEATURES INCLUDE SEVERAL BUILDINGS, STORAGE SHEDS, A BURIED DRUM AREA, AND SEVEN FORMER TREATMENT LAGOONS. ALL RESIDENTS WHO RESIDE WITHIN THREE MILES OF THE SITE ARE COMPLETELY DEPENDENT ON THE GROUND WATER UNDERLYING THE SITE FOR THEIR DRINKING WATER SUPPLY. FROM THE 1950S TO 1985, EITHER COCKERILLE CHEMICAL COMPANY OR GREENWOOD CHEMICAL COMPANY USED THE SITE FOR MANUFACTURING CHEMICALS FOR INDUSTRIAL, AGRICULTURAL, PHARMACEUTICAL, AND PHOTOGRAPHIC PURPOSES. THE COMPANIES STORED, TREATED, AND DISPOSED OF CHEMICALS ONSITE. IN 1985, OPERATIONS CEASED AT THE FACILITY FOLLOWING AN EXPLOSION AND FIRE. EPA INVESTIGATIONS THAT WERE CONDUCTED AFTER THIS FIRE IDENTIFIED ELEVATED LEVELS OF CYANIDE, SVOCS, AND VOCS IN LAGOONS AND GROUND WATER. IN 1987, EPA REMOVED BURIED AND SURFACE DRUMS AND CONTAINERS OF CHEMICALS FROM THE SITE, ALONG WITH THE SLUDGE ASSOCIATED WITH THREE OF THE ONSITE LAGOONS. A 1989 RECORD OF DECISION (ROD) PROVIDED FOR OFFSITE INCINERATION, SOLIDIFICATION AND/OR DISPOSAL OF 4,500 CUBIC YARDS OF CONTAMINATED SOIL, AND REMOVAL OF CONTAINERIZED CHEMICALS. AN EXPLANATION OF SIGNIFICANT DIFFERENCES ISSUED IN 1991 AUTHORIZED THE REMOVAL OF THREE PROCESS BUILDINGS. THIS ROD ADDRESSES THE CONTAMINATED GROUND WATER AND SURFACE WATER AS OPERABLE UNIT 2 (OU2) AND PROVIDES AN INTERIM REMEDY. A FUTURE ROD WILL ADDRESS ADDITIONAL CONTAMINATION OF ONSITE SOIL. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER AND SURFACE WATER ARE VOCS INCLUDING BENZENE, PCE, TCE, AND TOLUENE; SVOCS INCLUDING NAPHTHALENE; AND METALS INCLUDING ARSENIC.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES ONSITE PUMPING AND TREATMENT OF CONTAMINATED GROUND AND SURFACE WATER USING A TREATMENT SYSTEM CONSISTING OF PRECIPITATION, SEDIMENTATION, FILTRATION, AND UV/OXIDATION, FOLLOWED BY DISCHARGING THE TREATED WATER ONSITE TO SURFACE WATER; TREATING ONSITE SLUDGE RESIDUALS FROM THE GROUND WATER TREATMENT PROCESS, IF NECESSARY, PRIOR TO OFFSITE DISPOSAL IN A LANDFILL; AND MONITORING GROUND AND SURFACE WATER. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $3,218,000, WHICH INCLUDES AN ESTIMATED O&M COST OF $1,419,000 FOR 5 YEARS.

PERFORMANCE STANDARDS OR GOALS; NOT PROVIDED.
 
Remedy:  THE PRIMARY OBJECTIVES OF THIS REMEDY ARE TO MINIMIZE THE MIGRATION OF GROUND WATER CONTAMINANTS, TO INITIATE THE REDUCTION OF TOXICITY, MOBILITY AND VOLUME OF GROUND WATER CONTAMINANTS, TO COLLECT DATA ON AQUIFER AND CONTAMINANT RESPONSE TO REMEDIATION MEASURES, AND TO ELIMINATE UNACCEPTABLE ENVIRONMENTAL RISKS ASSOCIATED WITH LAGOON WATER. BECAUSE FINAL GROUND WATER CLEANUP GOALS CANNOT BE DETERMINED AT THIS TIME, THIS REMEDY IS CONSIDERED AN INTERIM ACTION FOR GROUND WATER. A FINAL ACTION ADDRESSING GROUND WATER WILL BE SELECTED IN A LATER ROD AFTER DATA GENERATED DURING THE IMPLEMENTATION OF THE INTERIM ACTION IS EVALUATED. THE SELECTED REMEDY FOR THE LAGOON WATER IS A FINAL ACTION. FUTURE ACTIONS WILL ADDRESS THREATS AT THE SITE PRESENTED BY ADDITIONAL CONTAMINATED SOILS AND BUILDINGS.

MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE;
* WITHDRAWAL OF CONTAMINATED GROUND WATER FROM BEDROCK AND OVERBURDEN THROUGH A NETWORK OF EXTRACTION WELLS AND ASSOCIATED PUMPS
* REMOVAL OF CONTAMINATED WATER IN LAGOONS 4 AND 5 WITH PUMPS
* CONVEYANCE OF EXTRACTED GROUND WATER AND LAGOON WATER THROUGH A PIPE NETWORK TO AN ONSITE WATER TREATMENT FACILITY
* ONSITE TREATMENT OF CONTAMINATED GROUND WATER AND LAGOON WATER THROUGH PRECIPITATION, SEDIMENTATION, FILTRATION AND ULTRAVIOLET/OXIDATION
* OFFSITE DISPOSAL OF RESIDUALS GENERATED DURING THE WATER TREATMENT PROCESS IN A LANDFILL (WITH TREATMENT PRIOR TO DISPOSAL IF NECESSARY)
* DISCHARGE OF TREATED WATER TO A TRIBUTARY OF STOCKTON CREEK (WEST STREAM)
* INVESTIGATION, AS DEEMED NECESSARY, TO FURTHER DEFINE THE NATURE AND EXTENT OF GROUND WATER CONTAMINATION
* PERIODIC EVALUATION OF THE PERFORMANCE AND THE EFFECTIVENESS OF THE GROUND WATER EXTRACTION SYSTEM
* MODIFICATION OF THE GROUND WATER EXTRACTION SYSTEM AS NECESSARY BASED ON PERIODIC EVALUATIONS
 
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