Site Name: GULF COAST VACUUM SERVICES
EPA ID: LAD980750137 EPA Region: 06 Metro Statistical Area:
P-7-31 OFF LA335, ABBYVILLE, LA 70510
Site Description: ACTIVE PIT USED FOR DISPOSAL OF OIL MUD,DRILLING FLUID & WASTE SALT WATER GENERATED BY TRUCK WASHING.
Operable Unit: 01
ROD ID: EPA/ROD/R06-92/076 ROD Date: 09/30/92
Contaminant: VOCs, Other Organics, Metals
Keys: Arsenic; Benzene; Capping; Carcinogenic Compounds; Chromium; Debris; Direct Contact; Dredging; Excavation; Groundwater; Groundwater Monitoring; Incineration/Thermal Destruction; Institutional Controls; Lead; MCLs; Metals; O&M; Onsite Containment; Onsite Disposal; Onsite Treatment; Organics; PAHs; RCRA; Safe Drinking Water Act; Sediment, Sludge; Soil; Solidification/Stabilization; Solvents; Treatability Studies; Treatment Technology; VOCs; Xylenes.
Abstract:
SITE HISTORY/DESCRIPTION: The 12.8-acre Gulf Coast Vacuum Services site is a former vacuum truck and oil field plant in Vermilion Parish, Louisiana. Land use in the area is predominantly agricultural. Ten residences within one-half mile of the site use the ground water below the Chicot Aquifer for drinking water and irrigation. The site is bounded to the north and west by pasture land, and to the east and south by another Superfund site, the D. L. Mud Superfund site, and the LeBoeuf Canal. From 1969 to 1980, several owners used the site as a trucking terminal to transport various metals, including waste generated from oil exploration and production activities. The site includes two open waste pits specifically, the Washout Pit and West Pit-and two vegetated areas, known as the Former West Pit. The Former West Pit adjoins the West Pit to the south and was used for disposal. Other site features include vertical storage tanks, horizontal tanks, and three underground storage tanks. During site operations, unpermitted disposal of primarily oil industry-related waste occurred in the unlined pits, ditches, and site soil. EPA investigations, which started in 1980, led to three removal actions at the site from 1990 to 1992. These removal actions addressed contaminant overflow caused by critical rainfall, from both the West Pit and Washout Pit, provided for construction of a secondary containment levee west of the West Pit; pumping, treatment, and discharge of wastewater from the two pits; and fencing the area. This ROD addresses the final remedial action for all of the sources of contamination as OU1. Future RODs will address the contaminated overflow and the migration from offsite pits, as OU2. The primary contaminants of concern affecting the soil, sediment, pit sludge, and ground water are VOCs, including benzene; other organics, including PCBs and naphthalene; and metals, including arsenic and barium.
PERFORMANCE STANDARDS OR GOALS: Chemical-specific soil, sediment, and pit sludge goals are based on SDWA MCLs, and include arsenic 16 ug/kg; barium 5,400 mg/kg; and benzene 0.66 mg/kg. Ground water is expected to meet the National Primary Drinking Water and health-based standards. Chemical-specific goals for ground water are based on SWDA MCLs and MCLGs, and include arsenic 50 ug/l (MCL); barium 2,000 ug/l (MCL); cadmium 5 ug/l (MCL); total chromium 100 ug/l (MCL); total mercury 2 ug/l (MCL); and benzene 5 ug/l (MCL).
INSTITUTIONAL CONTROLS: Institutional controls, including deed restrictions, will be implemented onsite to prevent disturbance of the clay cover.
Remedy:
SELECTED REMEDIAL ACTION: The selected remedial action for this site includes consolidation and onsite incineration of approximately 12,000 cubic yards of organic- and inorganic-contaminated waste pit sludge and 7,950 cubic yards of associated soil, 12,000 gallons of tank contents, and 155 cubic yards of tank sludge, followed by stabilization/solidification of the residual ash, if necessary; stabilizing and solidifying onsite approximately 18,900 cubic yards of site inorganic-contaminated soil, and 600 cubic yards of surface sediment; disposing of all of these residuals in an onsite excavation and covering the area with a clay cover; allowing ground water to naturally attenuate; monitoring ground water in the upper and lower aquifers; conducting onsite and offsite air monitoring; treating air emissions as needed; and implementing institutional controls, including deed restrictions. The estimated present worth cost for this remedial action is $13,026,000, which includes an annual O&M cost of $18,050 for 30 years.