Award Date

1-1-1991

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Geoscience

First Committee Member

Steve Mizell

Number of Pages

117

Abstract

Purging method, sampling time, and screen length were compared to determine their impact on the collection of representative ground-water samples from monitoring wells sited in an aquitard contaminated with volatile organic compounds (VOC); Two well-purging methods--(1) pump to the bottom of the screened interval and (2) pump to the top of the screened interval--were evaluated on three monitoring wells with different screened intervals (0.75-m and 3.0-m screen lengths); Monitoring wells completed in an aquitard should be purged before collecting ground-water samples for VOC analysis. Samples collected 2-8 hours after purging were statistically similar and representative of the highest VOC concentrations attained in the well. VOC concentrations detected in a long-screen (3.0-m) well were significantly impacted by the purging method used. Variation in purging method did not significantly impact VOC concentrations in samples collected from the short-screen (0.75-m) Wells (Abstract shortened with permission of author.).

Keywords

Aquitard; Compounds; Evaluation; Field; Length; Method; Organic; Purging; Sampling; Screen; Time; Volatile

Controlled Subject

Hydrology; Geology; Geochemistry

File Format

pdf

File Size

3706.88 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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