Site Name: DUBOSE OIL PRODUCTS CO
EPA ID: FLD000833368 EPA Region: 04 Metro Statistical Area: 6080
HWY C97, CANTONMENT, FL 32533
Operable Unit:
ROD ID: EPA/ROD/R04-90/071 ROD Date: 03/29/90
Contaminant: VOCS; ; BENZENE; TCE; TOLUENE; XYLENES; ORGANICS; PHENOLS; PNAS
Keys: AERATION; BENZENE; BIODEGRADATION/LAND APPLICATION; CARBON ADSORPTION; CARCINOGENIC COMPOUNDS; CLEAN AIR ACT; CLEAN WATER ACT; DIRECT CONTACT; FILLING; GROUND WATER; GROUND WATER MONITORING; INSTITUTIONAL CONTROLS LEACHATE COLLECTION/TREATMENT; MCLGS; MCLS; O&M; OILS; ONSITE CONTAINMENT; ONSITE DISCHARGE; ONSITE DISPOSAL; ONSITE TREATMENT; ORGANICS; PHENOLS; RCRA; SAFE DRINKING WATER ACT; SEDIMENT; SOIL; SOLVENTS; STATE STANDARDS/REGULATIONS; SURFACE WATER; SURFACE WATER COLLECTION/DIVERSION; TCE; TOLUENE; TREATMENT TECHNOLOGY; VOCS; WATER QUALITY CRITERIA; XYLENES
Abstract:
THE 20-ACRE DUBOSE OIL PRODUCTS SITE IS AN INACTIVE WASTE STORAGE, TREATMENT, RECYCLING, AND DISPOSAL FACILITY IN CANTONMENT, ESCAMBIA COUNTY, FLORIDA. SURROUNDING LAND USE IS PRIMARILY RURAL AGRICULTURAL. THE SITE OVERLIES A DEEP AQUIFER, WHICH SERVES AS A DRINKING WATER SOURCE FOR AREA RESIDENTS. SITE OPERATIONS BEGAN IN 1979, AND INCLUDED THERMAL TREATMENT OF WASTE OIL, PETROLEUM REFINING WASTES, OIL BASED SOLVENTS, AND WOOD TREATMENT WASTES; STEAM HEATING OF SPENT IRON/STEEL PICKLE LIQUORS; AND ROCK SALT FILTRATION OF WASTE DIESEL FUEL. LIQUID WASTE WAS TRANSFERRED FROM TANKER TRUCKS AND DRUMS TO ONSITE TREATMENT TANKS FOR THESE PROCESSES. EMPTY DRUMS WERE EITHER SOLD OR CRUSHED AND BURIED ONSITE. OPERATIONS CEASED IN 1981, AND THE SITE OWNER COMMENCED CLOSURE OF THE SITE WITHOUT A PROPER CLOSURE PLAN. UNAUTHORIZED CLOSURE ACTIVITIES INCLUDED EXCAVATION OF BURIED DRUMS (CAUSING SOME DRUMS TO BE PUNCTURED), OPERATION OF AN AERATION SYSTEM TO REMEDIATE ONSITE DRAINAGE PONDS, AND MOVEMENT OF CONTAMINATED MATERIAL WITH HEAVY EQUIPMENT. A STATE EMERGENCY RESPONSE ACTION IN 1985 INCLUDED EXCAVATION AND ONSITE VAULTING OF 38,000 CUBIC YARDS OF CONTAMINATED SOIL AND THE OFFSITE DISPOSAL OF ONSITE DRUMS. SITE INVESTIGATIONS IN 1988 IDENTIFIED THE SOIL CONTAINMENT VAULT AS THE PRINCIPAL CONTAMINANT SOURCE AND REVEALED CONTAMINATION ABOVE HEALTH-BASED LEVELS OF THE SHALLOW AQUIFER BENEATH THE SITE, IN ONSITE SURFACE WATER, AND SEDIMENT. INVESTIGATIONS SHOWED THAT THE DEEP AQUIFER CONTAINED EXTREMELY LOW TO UNDETECTABLE LEVELS OF CONTAMINANTS, WHICH WERE BELOW DRINKING WATER STANDARDS. THIS RECORD OF DECISION (ROD) ADDRESSES FINAL REMEDIATION OF SOURCE AREAS AND ONSITE SHALLOW GROUND WATER. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, SEDIMENT, GROUND WATER, AND SURFACE WATER ARE VOCS INCLUDING BENZENE, TCE, TOLUENE, AND XYLENES; AND OTHER ORGANICS INCLUDING PAHS AND PHENOLS. THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATING THE TOP 20 FEET OF VAULT SOIL CONTAINING LOW-LEVEL CONTAMINATION AND DISPOSING OF SOIL IN AN ONSITE RAVINE AREA; EXCAVATING THE REMAINING VAULT SOIL AND TREATING BY AEROBIC BIODEGRADATION, WHICH INCLUDES WINDROWING OF SOIL ON A CONCRETE SLAB, ADDITION OF MICROBIAL SEED AND NUTRIENTS, AND AERATION; DISPOSING OF TREATED SOIL ONSITE IN THE RAVINE AREA; PLACING A TWO-FOOT SOIL COVER OVER THE VAULT AREA AND THE RAVINE AREA; TREATING SOIL LEACHATE FROM THE WINDROWING PROCESS USING FILTRATION AND EITHER CARBON ADSORPTION OR UV OXIDATION FOLLOWED BY ONSITE DISCHARGE TO SURFACE WATER; DRAINING AND FILLING OF ONSITE PONDS; INSTALLING SURFACE WATER RUNOFF CONTROLS; CONDUCTING GROUND WATER AND SOIL MONITORING; RESTORING GROUND WATER BY NATURAL ATTENUATION; AND IMPLEMENTING INSTITUTIONAL CONTROLS INCLUDING DEED AND GROUND WATER USE RESTRICTIONS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $3,008,000, WHICH INCLUDES AN ANNUAL O&M COST OF $115,000 FOR YEARS 0 TO 5 AND $10,000 FOR YEARS 6 TO 10. PERFORMANCE STANDARDS OR GOALS; CLEANUP STANDARDS FOR LEACHATE DISCHARGE ARE BASED ON THE MORE STRINGENT OF FEDERAL OR STATE ARARS AND INCLUDE BENZENE 1 UG/L (STATE), TCE 3 UG/L (STATE), XYLENES 50 UG/L (STATE), AND PNAS 10 UG/L (EPA DETECTION LIMIT). SOIL CLEANUP GOALS ARE BASED ON EITHER LEACHING POTENTIAL (LP) OR HEALTH-BASED CRITERIA (HBC) AND INCLUDE BENZENE 10 MG/KG (HBC), TCE 0.050 MG/KG (LP), XYLENES 1.5 MG/KG (LP), AND PAHS 50 MG/KG (LP). INSTITUTIONAL CONTROLS; DEED AND GROUND WATER USE RESTRICTIONS WILL BE IMPLEMENTED AT THE SITE.
Remedy:
THE SELECTED REMEDIAL ALTERNATIVE WILL BE BOTH THE FIRST AND THE FINAL REMEDIAL ACTION FOR THIS SITE. THIS ALTERNATIVE WILL USE BIODEGRADATION TO TREAT THE CONTAMINATED SOILS TO LEVELS THAT ARE WITHIN ACCEPTABLE RISK LEVELS FOR HUMAN HEALTH AND THE ENVIRONMENT. THIS REMEDY WILL NOT ALLOW FOR FURTHER CONTAMINATION OF THE GROUNDWATER. THE MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE:
* EXCAVATION OF THE TOP TWENTY FEET OF VAULT SOILS, SHOWN IN THE RI TO BE UNCONTAMINATED, AND PLACEMENT OF THOSE SOILS INTO THE RAVINE AREA;
* TRANSFORMATION OF THE HOG BARN AREA INTO A PROCESS AREA WHERE THE BATCH BIOREMEDIATION SYSTEM WILL BE INSTALLED;
* EXCAVATION OF THE REMAINDER OF THE VAULT SOILS IN SEPARATE BATCHES, BIOREMEDIATION AND DISPOSAL IN THE RAVINE AREA;
* DRAINAGE AND FILLING OF THE ONSITE PONDS;
* PLACEMENT OF A TWO FOOT TOPSOIL LAYER OVER THE RAVINE AND FORMER POND AREA, GRADING AND VEGETATION;
* INSTALLATION OF SURFACE WATER RUNOFF CONTROLS TO ACCOMMODATE SEASONAL PRECIPITATION;
* GROUNDWATER MONITORING;
* ADDITIONAL SOIL SAMPLING DURING THE REMEDIAL DESIGN TO CONFIRM LOCATION OF "HOT SPOTS" OF CONTAMINATED SOIL OUTSIDE OF THE VAULT;
* DEED RESTRICTIONS TO PRECLUDE INAPPROPRIATE FUTURE USE.