Enhanced in-situ biodegradation of petroleum hydrocarbons using passive addition of oxygen to groundwater
- Univ. of Waterloo, Ontario (Canada)
A field trial incorporating the addition of oxygen to ground water through a passive interception system to ground water in a shallow sand aquifer beneath a former gasoline station in southwestern Ontario (Canada) has been initiated. The purpose of the trial is to evaluate the degree of remediation by oxygen-enhanced biodegradation. Based on the results of preliminary tests, the selected oxygen source is an oxygen-releasing compound (ORC), a proprietary metal peroxide powder. The ORC is mixed with sand, wrapped in a permeable filter sock and lowered down an unpumped well to the ground water zone in a retrievable plastic harness. In the design configuration adopted for the test, seven source wells constructed of 20 cm diameter PVC plastic were installed across a segment of a plume containing elevated concentrations of BTEX. The wells were screened (No. 8 slot) across the water table from 3 m below ground surface to their terminal depths at 6 m. The source wells were installed at 0.8 m centers in staggered fashion in two adjacent rows separated by 0.8 m. The experiment was designed with the intent of inducing convergent flow of ground water through the source wells to ensure interception of the plume across the trial segment by maintaining hydraulic conductivity of the ORC-filled chambers within the wells above that of the surrounding aquifer materials.
- OSTI ID:
- 122430
- Report Number(s):
- CONF-9510211-; ISSN 0017-467X; TRN: 95:024178
- Journal Information:
- Ground Water, Vol. 33, Issue 5; Conference: 1995 Association of Ground Water Scientists & Engineers (AGWSE) educational program, Indianapolis, IN (United States), 28-30 Oct 1995; Other Information: PBD: Sep-Oct 1995
- Country of Publication:
- United States
- Language:
- English
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