Sampling for volatile organic compounds from an aquitard: A field evaluation of screen length, purging method, and sampling time

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.).

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Geoscience

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1991

Author dc:creator

• Alduino, Amy Josephine

Contributors dc:contributor

• Steve Mizell

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/156

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-1155