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Synergistic Application of Four Remedial Techniques at an Industrial Site
Author(s) -
Dasch Jean. M.,
Abdul Abdul S.,
Rai Devi N.,
Gibson Thomas L.,
Grosvenor Noel
Publication year - 1997
Publication title -
groundwater monitoring and remediation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 47
eISSN - 1745-6592
pISSN - 1069-3629
DOI - 10.1111/j.1745-6592.1997.tb00595.x
Subject(s) - soil vapor extraction , remedial action , water table , groundwater remediation , environmental science , extraction (chemistry) , underground storage tank , gasoline , groundwater , environmental engineering , groundwater recharge , air sparging , waste management , environmental remediation , petroleum engineering , hydrology (agriculture) , contamination , chemistry , aquifer , storage tank , engineering , geotechnical engineering , ecology , chromatography , biology
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 (clay layers), hydrology (a recharge zone with a perched water table), and contaminant (approximately 4800 gallons of mixed gasoline and oil). 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 percent by vapor extraction, 28 percent by bioventing, and 13 percent 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.