Synergistic application of four remedial techniques at an industrial site
The soil and ground water at a General Motors plant site were contaminated with petroleum products from leaking underground storage tanks. Based on the initial assessment, the site was complex from the standpoint of geology, hydrology, and contaminant. After a thorough study of remedial alternatives, a synergistic remedial approach was adopted including pump and treat, product removal, vapor extraction, and bioventing. The system was designed and implemented at the site through 22 dual-extraction wells. Over a 21-month period, 4400 gallons of gasoline and oil were removed from the system, including 59% by vapor extraction, 28% by bioventing, and 13% by pump and treat. Synergism between the various remedial methods was demonstrated clearly. Ground water pump and treat lowered the water table, allowing air to flow for vapor extraction. The vacuum applied for vapor extraction increased the ground water removal rate and the efficiency of pump and treat. The vapor extraction system also added oxygen to the soil to stimulate aerobic biodegradation.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 544147
- Journal Information:
- Ground Water Monitoring and Remediation, Vol. 17, Issue 3; Other Information: PBD: Sum 1997
- Country of Publication:
- United States
- Language:
- English
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