- 3,000 Cubic Meters
- 10,000 ppm Waste Oil ® <1,500 ppm in < 60 days
- Microbial Injection
Doggett Environmental Corporation, in conjunction with BioGenesis, was retained by Cummins Southwest, Inc. to conduct an assessment and remediation for their waste oil tank release at the facility in El Paso, Texas. In April 1992, we completed soil sampling and laboratory analysis and found the waste oil contamination had migrated down to 55 feet deep. The major contamination, located from 15 feet to 45 feet in the vadose zone around the tank area, showed an average TPH concentration of 10,000 ppm (mg/kg).
|
In July 1992, we started In- Situ Soil Washing, followed by a small bioremediation as a pilot test at the site. By use of a truck mounted soil injector recommended by U.S. EPA, one hundred and fifty gallons of BioGenesis BG- Clean 402 was diluted and mixed with proper proportion of special nutrients and molecular oxygen prior to being injected into the subsurface contamination zone over a period of 5 working days. During soil injection, a certain quantity of gray fluid was seen coming up to the ground surface into a containment berm area due to a pressure relief. It indicated the immediate chemical action between BioGenesis BG-402 and the waste oil.
Subsequently, we injected certain quantities of site specific microbial solutions which were cultured by Doggett Environmental Corporation, into the contamination zone. Four soil samples were collected on September 16, 1992 from the entire contaminated zone at the depths of 25 feet to 55 feet. The average TPH concentration had been reduced to approximately 1,500 ppm (mg/kg). A minimum of 85% in situ biodegradation was achieved in only two months.
|