Scope of Work:

This project involved multiple situations, remediation and closure of a large collection pit for wash rack sludges, an overflow retention pond, and a 2 - acre equipment yard that were all contaminated with petroleum hydrocarbons.

Sludge Pit

The sludge pit was located adjacent to the wash rack where heavy equipment had been washed down. Approximately 1655 tons of sludge was excavated from the pit, solidified, permitted, and hauled to a state approved landfill facility. After all excavation was completed, the sludge pit floor was tested for VOC (volatile organic compounds) and PAH (polynuclear aromatic hydrocarbons) and all found to be non-detect.

Retention Pond

The overflow retention pond was adjacent to the sludge pit. It was tested and permitted for disposal to the city sewer system. Approximately 260,000 gallons of water was pumped about ½ mile to the closest sewer inlet available. The retention pond and sludge pit were both cleared for closure by ADEM and graded off to ground level.

Equipment Yard

Soil samples from the equipment yard indicated TPH contamination levels ranging from 100 ppm to 4000 ppm. Ramsorb, a biologically active oil absorbent, was blended into the contaminated soil and follow-up tilling was performed periodically over the next 145 days until all contamination levels were below 100ppm.

Scope of Work:

This project included developing a plan acceptable to the Alabama Department of Environmental Management and to the Mobile Corps of Engineers for the bioremediation of approximately 6000 cu. yards of sediment dredged from docking and fueling slips at the company's Chickasaw Creek facility.

The average contamination was around 800 ppm. The project included mobilization of heavy equipment, constructing a large bermed remediation area and moving the dredged material approximately 1/4 mile to the remediation work area.

Bacterial product was blended into the contaminated soil and follow-up visits were conducted to retill the site and monitor the reduction in hydrocarbon contamination. The contamination level was reduced to below 10 ppm in approximately 150 days.

Scope of Work:

This project involved the clean-up of approximately 2,000 cubic yards of soil contaminated with number 6 fuel oil. The petroleum contamination was contained within a large bermed area surrounding a ten million gallon above ground storage tank. The contamination had resulted from small leaks and spills during normal operations over a period of years.

Approximately sixty percent of the contamination was hauled to a state permitted incinerator facility for disposal by incineration and the remaining contaminated soil was excavated and moved approximately five hundred yards to be bioremediated on site.

The contaminated soil at the bioremediation site was spread out on plastic liners to a depth of approximately twelve inches and RamSorb was thoroughly tilled in to the soil. The initial contamination averaged approximately 4,800 ppm.

Periodically during the following ten months, the site was tilled, supplemental nutrients were added to the site, and soil samples were taken to monitor the reduction of the contamination. After approximately 11 months, the contamination was below 100 ppm and the bioremediation project was complete.