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Record of Decision System (RODS)

SAUNDERS SUPPLY CO.

Abstract

Site Name:  SAUNDERS SUPPLY CO.
Address:  KINGS HWY BY CRITTENDEN & GODW 
City & State:  CHUCKATUCK  VA  23432
County:  SUFFOLK CITY
 
EPA ID:  VAD003117389
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-91/136
ROD Date:  09/30/1991
Operable Unit(s):  01
 
Media:  SOIL GROUNDWATER
 
Contaminant:  ORGANICS, DIOXIN, PCP, METALS, ARSENIC, CHROMIUM
 
Abstract:  THE 7.3-ACRE SAUNDERS SUPPLY SITE IS AN ACTIVE LUMBER YARD FACILITY IN THE VILLAGE OF CHUCKATUCK, A RURAL AREA OF THE CITY OF SUFFOLK, VIRGINIA. LAND USE IN THE AREA IS PREDOMINANTLY MIXED RESIDENTIAL AND COMMERCIAL. THE SITE IS COMPOSED OF THE SAUNDERS SUPPLY COMPANY PROPERTY AND A PORTION OF THE ADJACENT KELLY PROPERTY. COMMERCIAL ESTABLISHMENTS AND RESIDENCES ARE TO THE EAST OF THE FACILITY, AND A WOODED AREA IS TO THE WEST. FROM 1964 TO 1991, THE SAUNDERS SUPPLY COMPANY USED THE SITE TO CHEMICALLY TREAT WOOD BEFORE DISTRIBUTION. PRIOR TO 1984, TREATED WOOD WAS PLACED ON PALLETS LOCATED DIRECTLY ON THE GROUND NEAR THE WOOD TREATING PROCESS AREA. SUBSEQUENTLY, FROM 1984 TO 1991 WHEN THE SITE CEASED OPERATIONS, TREATED WOOD WAS AIR-DRIED ON A CONCRETE DRIP PAD. THESE IMPROPER TREATMENT AND DISPOSAL PROCESSES HAVE CONTAMINATED ONSITE SOIL, SEDIMENT, AND GROUND WATER. PRINCIPAL SITE FEATURES INCLUDE THE TREATMENT FACILITIES, A FORMER CONICAL BURN PIT AREA, A FORMER EARTHEN SEPARATION POND, AND A WASTEWATER POND WEST OF THE SITE. SOME DRAINAGE FROM THE SITE DISCHARGES TO STORM SEWERS ADJACENT TO THE SITE BOUNDARY. AFTER THE STATE INVESTIGATED THE SITE, SAUNDERS SUPPLY WAS REQUIRED TO INSTALL MONITORING WELLS, EXCAVATE THE CONTAMINATED SOIL AROUND THE CONICAL BURN PIT AREA, AND INSTALL A RECOVERY WELL. TREATED WATER FROM THE RECOVERY WELL WAS RECYCLED AS THE PROCESS WATER FOR THE CHEMICAL TREATMENT OF LUMBER. EPA CONDUCTED ADDITIONAL INVESTIGATIONS THAT REVEALED THE PRESENCE OF PENTACHLOROPHENOL (PCP), ARSENIC, AND CHROMIUM IN THE GROUND WATER. THIS RECORD OF DECISION (ROD) ADDRESSES ALL MEDIA IMPACTED BY SITE CONTAMINATION AS A FINAL REMEDY. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING SOIL, SEDIMENT, AND GROUND WATER ARE ORGANICS INCLUDING DIOXINS AND PCP; AND METALS INCLUDING ARSENIC AND CHROMIUM.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES DRAINING THE WASTEWATER FROM THE WASTEWATER POND, FOLLOWED BY ONSITE OR OFFSITE TREATMENT AND DISCHARGE; EXCAVATING, TREATING USING DECHLORINATION, AND OFFSITE DISPOSAL OF 700 TONS OF SEDIMENT FROM THE WASTEWATER POND AND THE FORMER EARTHEN SEPARATION POND; EXCAVATING, TREATING ONSITE USING LOW-TEMPERATURE THERMAL DESORPTION (LTTD), AND OFFSITE DISPOSAL OF 24,300 TONS OF SOIL AND SEDIMENT FROM THE STORM SEWER EXCEEDING 1.46 MG/KG PCP; REGENERATING SPENT CARBON FROM THE LTTD TREATMENT PROCESS OFFSITE; TREATING GROUND WATER DURING THE DEWATERING PROCESS PRIOR TO EXCAVATING THE SOIL; DISCHARGING THE TREATED WATER ONSITE OR OFFSITE BASED ON REMEDIAL DESIGN STUDIES; TESTING THE CONCRETE PADS FOR RCRA CHARACTERISTIC HAZARDOUS WASTES; SCARIFICATION OF THE TOP 1 INCH OF THE CONCRETE PADS AND TREATING THE REMOVED MATERIAL USING SOLIDIFICATION IF DETERMINED TO BE RCRA CHARACTERISTIC WASTE, WITH SUBSEQUENT OFFSITE DISPOSAL ALONG WITH THE REMAINDER OF THE CONCRETE PADS; REMOVING AND PLUGGING PREEXISTING WELLS; CLEANING AND SLIPLINING THE STORM SEWER; MONITORING GROUND WATER; AND IMPLEMENTING INSTITUTIONAL CONTROLS INCLUDING DEED AND GROUND WATER USE RESTRICTIONS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $20,485,000, WHICH INCLUDES AN ANNUAL O&M COST OF $15,000.

PERFORMANCE STANDARDS OR GOALS; THE CHEMICAL-SPECIFIC SOIL CLEAN-UP LEVEL IS PCP 1.46 MG/KG. IF GROUND WATER IS DISCHARGED ONSITE, TREATED EFFLUENT MUST MEET STATE PERMIT LIMITS; OR IF DISCHARGED OFFSITE, TREATED EFFLUENT MUST MEET LEVELS SET BY THE RECEIVING FACILITY.
 
Remedy:  THIS REMEDY WILL ADDRESS ALL OF THE MEDIA IMPACTED BY THE CONTAMINATION AT THE SITE. IT IS NOT WARRANTED AT THIS TIME TO SPLIT THE SITE INTO SMALLER COMPONENTS CALLED OPERABLE UNITS TO ADDRESS INDIVIDUAL MEDIA. BASED ON THE INFORMATION DERIVED THROUGH THE REMEDIAL INVESTIGATION, THE SITE SOILS POSE A PRINCIPAL THREAT TO HUMAN HEALTH. SINCE WASTES WILL BE LEFT IN PLACE, LONG-TERM MONITORING OF THE GROUND WATER MUST BE PERFORMED. THE GROUND WATER MONITORING MUST TEST FOR THE PRESENCE OF PENTACHLOROPHENOL (PCP), ARSENIC, AND CHROMIUM BECAUSE THESE CONTAMINANTS HAVE BEEN DETECTED AT ELEVATED LEVELS IN THE GROUND WATER TO DATE.

THE SELECTED REMEDY INCLUDES THE FOLLOWING MAJOR COMPONENTS;
* EXCAVATION, DECHLORINATION TREATMENT, AND OFFSITE DISPOSAL OF THE K001 SEDIMENTS FROM THE WASTEWATER POND AND THE FORMER EARTHEN SEPARATION POND.
* EXCAVATION, LOW TEMPERATURE THERMAL DESORPTION TREATMENT AND OFFSITE DISPOSAL OF THE SITE SOILS AND THE SEDIMENTS FROM THE STORM SEWER.
* TREATMENT OF THE GROUND WATER DURING THE DEWATERING PROCESS PRIOR TO EXCAVATING THE SOIL.
* SCARIFICATION OF THE TOP ONE INCH OF THE CONCRETE PADS, SOLIDIFICATION TREATMENT OF THE REMOVED MATERIAL, AND OFFSITE DISPOSAL OF THE SOLIDIFIED MATERIAL AND THE REMAINDER OF THE CONCRETE PADS.
* CLEANING AND SLIPLINING OF THE STORM SEWER.
* GROUND WATER MONITORING.
* INSTITUTIONAL CONTROLS.
 
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