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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/R03-90/084
ROD Date:  12/29/1989
Operable Unit(s):  01
 
Media:  SOIL
 
Contaminant:  VOCS, BENZENE, PCE, TCE, NAPTHALENE DERIVATIVES, METALS, ARSENIC, CYANIDE
 
Abstract:  THE FIVE-ACRE GREENWOOD CHEMICAL SITE IS A FORMER CHEMICAL PLANT IN NEWTON, VIRGINIA. THE SITE IS IN THE FOOTHILLS OF THE BLUE RIDGE MOUNTAIN RANGE AND IMMEDIATELY ADJOINING LANDS ARE USED FOR RESIDENTIAL AND AGRICULTURAL PURPOSES. GROUND WATER IS USED BY ALL PERSONS WITHIN A THREE-MILE RADIUS FOR DRINKING WATER PURPOSES. THE CLOSEST RESIDENTIAL WELL IS WITHIN 400 FEET OF THE SITE, AND THE CLOSEST DOWNGRADIENT WELL IS APPROXIMATELY 1,700 FEET FROM THE SITE. THE CHEMICAL PLANT WAS USED PRIMARILY FOR THE PRODUCTION OF INDUSTRIAL, PESTICIDE, PHARMACEUTICAL, AND PHOTOGRAPHIC PRODUCTS FROM 1947 UNTIL 1985, AND PRODUCED WASTE SOLVENTS INCLUDING LISTED RCRA F002 AND F005 WASTES. PLANT OPERATIONS WERE TERMINATED IN APRIL 1985, AFTER A TOLUENE FIRE KILLED FOUR EMPLOYEES. CONTAMINATED AREAS AT THE SITE INCLUDE SEVEN LAGOONS USED TO STORE WASTEWATERS GENERATED DURING PLANT OPERATIONS, A BURIED DRUM AREA, AND PROCESS AREA SOIL. TO MITIGATE THREATS DUE TO CONTAMINATION, EPA EMERGENCY RESPONSE ACTIVITIES WERE CONDUCTED BETWEEN 1987 AND 1988. THESE ACTIVITIES INCLUDED REMOVAL OF SURFACE DRUMS AND OTHER STORED CHEMICALS; EXCAVATION AND REMOVAL OF 500 BURIED DRUMS; EXCAVATION AND SUBSEQUENT REMOVAL OF SLUDGE FROM THREE LAGOONS; AND TEMPORARY STORAGE OF UNDERLYING SOIL ASSOCIATED WITH THE EXCAVATED LAGOONS IN A LINED CELL CONSTRUCTED IN ONE OF THE LAGOONS. THIS OPERABLE UNIT ADDRESSES APPROXIMATELY 1.5 ACRES OF HIGHLY CONTAMINATED PORTIONS OF THE SITE, INCLUDING THE CONTAMINATED SOIL ASSOCIATED WITH THE THREE EXCAVATED LAGOONS, A BACKFILLED LAGOON, AND CONTAINED CHEMICALS IN THE BUILDINGS. A SECOND OPERABLE UNIT WILL ADDRESS THE REMAINDER OF THE SITE INCLUDING ADDITIONAL SOIL AND SEDIMENT, AND GROUND WATER UNDERLYING AND DOWNGRADIENT OF THE CONTAMINATED SOIL. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL ARE VOCS INCLUDING BENZENE, PCE, AND TCE; OTHER ORGANICS INCLUDING A WIDE VARIETY OF NAPTHALENE DERIVATIVES (TENTATIVELY IDENTIFIED COMPOUNDS); METALS INCLUDING ARSENIC; AND OTHER INORGANICS INCLUDING CYANIDE.

THE SELECTED REMEDIAL ACTION FOR THIS OPERABLE UNIT INCLUDES EXCAVATION AND OFFSITE INCINERATION OF APPROXIMATELY 4,500 CUBIC YARDS OF CONTAMINATED SOIL, BACKFILLING WITH CLEAN SOIL, AND REVEGETATING; REMOVAL OF CHEMICALS STORED IN ONSITE BUILDINGS; AND SURFACE WATER COLLECTION/DIVERSION DURING REMEDY IMPLEMENTATION. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $8,787,900. THERE ARE NO O&M COSTS ASSOCIATED WITH THE REMEDY FOR THIS OPERABLE UNIT.

PERFORMANCE STANDARDS OR GOALS: CONTAMINATED SOIL WILL BE EXCAVATED TO LEVELS WHERE LEACHATE CONTAMINATION WILL NOT RAISE GROUND WATER LEVELS ABOVE THE ASSOCIATED MCLS, WQC, OR HEALTH-BASED CRITERIA. FOR INDIVIDUAL CONTAMINANTS IN THE SOIL, THE CLEANUP GOALS AND ASSOCIATED TARGET CRITERIA INCLUDE BENZENE 0.08 MG/KG (MCL), TCE 0.13 MG/KG (MCL), PCE 0.07 MG/KG (WQC), AND SITE-SPECIFIC NAPTHALENE DERIVATIVES (TENTATIVELY IDENTIFIED COMPOUNDS) 5,000 MG/KG (THRESHOLD TOXICITY). THE CLEANUP LEVEL FOR ARSENIC WAS SET AT 25 MG/KG, BASED ON A NON-LETHAL EXCESS LIFETIME CANCER RISK OF 10-5.
 
Remedy:  THIS OPERABLE UNIT IS THE FIRST OF TWO OPERABLE UNITS FOR THE SITE. THE SELECTED REMEDY FOR OPERABLE UNIT ONE (OU-1) SHALL REMEDIATE CONTAMINATED SOILS ASSOCIATED WITH THREE (3) FORMER LAGOONS AREA, AND CONTAINED CHEMICALS IN BUILDINGS WHICH HAVE BEEN DETERMINED TO PRESENT A PRINCIPAL THREAT TO HUMAN HEALTH AND/OR THE ENVIRONMENT AT THE SITE. THE REMAINDER OF THE SITE CONSTITUTES OPERABLE UNIT TWO (OU-2) AND INCLUDES ADDITIONAL SOIL, SEDIMENT, AND GROUNDWATER. A REMEDY FOR OU-1 IS EXPECTED TO REMOVE ALL SOIL CONTAMINATION OF CONCERN FROM AREAS ADDRESSED BY THE REMEDY. AS A RESULT, LONG-TERM MANAGEMENT OF SOILS ASSOCIATED WITH OU-1 WILL NOT BE NECESSARY.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE THE FOLLOWING;

* EXCAVATION OF SOIL EXCEEDING RISK-BASED CLEANUP LEVELS (ESTIMATED AT 4,500 CUBIC YARDS);
* IMPLEMENTATION OF RUNOFF CONTROLS DURING EXCAVATION;
* STAGING AND SCREENING OF THE EXCAVATED SOIL;
* TRANSPORTATION OF CONTAMINATED SOIL TO AN OFFSITE, HIGH TEMPERATURE, RCRA-PERMITTED THERMAL TREATMENT FACILITY (INCINERATOR);
* INCINERATION OF SOIL, STABILIZATION OF THE ASH (IF NECESSARY), AND DISPOSAL OF THE ASH IN RCRA SUBTITLE C LANDFILL;
* BACKFILLING OF THE EXCAVATED AREAS WITH CLEAN FILL;
* COVERAGE WITH TOPSOIL AND REVEGETATION;
* REMOVAL/DISPOSAL OF CHEMICALS IN ONSITE BUILDINGS.
 
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