DNAPL flow behavior in a contaminated aquifer: Evaluation of field data

Journal Article · Sun Dec 31 04:00:00 EST 1995 · Ground Water Monitoring and Remediation

DOI:https://doi.org/10.1111/j.1745-6592.1995.tb00560.x· OSTI ID:153502

Oolman, T; Godard, S T; Pope, G A; Jin, M; Kirchner, K

A pool of dense nonaqueous phase liquid (DNAPL) containing TCE and other chlorinated solvents has been removed from the subsurface at Hill Air Force Base, Utah, as part of an interim remedial action. The removal of the DNAPL pool means that future of-site migration of dissolved contaminants in the ground water is minimized, and costs for final remedial actions ar reduced. A pump-and-treat system recovered more than 23,000 gallons of DNAPL and one million gallons of contaminated ground water from the aquifer. The efficiency of this remedial action was evaluated on the basis of extensive field and laboratory data. The behavior of DNAPL flow in the aquifer sands was characterized by collecting core samples from two borings in the DNAPL saturation. Core flooding results show that approximately one-third of the DNAPL originally in the pool is not recovered by water displacement, but remains as a residual saturation held in place by capillary pressure. However, subsequent flooding with two pore volumes of surfactant solution reduced the residual DNAPL saturation in the sand by one order of magnitude. Analytical and numerical models for the DNAPL flow behavior at the site were developed. This is the first time that such models have been developed and applied to an actual DNAPL pumping test conducted in the field.

• Sponsoring Organization: USDOE
• OSTI ID: 153502
• Journal Information: Ground Water Monitoring and Remediation, Journal Name: Ground Water Monitoring and Remediation Journal Issue: 4 Vol. 15; ISSN 1069-3629; ISSN GWMREV
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AQUIFERS
CHLORINATED ALIPHATIC HYDROCARBONS
ENVIRONMENTAL TRANSPORT
MATHEMATICAL MODELS
MILITARY FACILITIES
ORGANIC SOLVENTS
REMEDIAL ACTION
REMOVAL
UTAH