{"id":{"repo_id":"unlv","oai_identifier":"oai:oasis.library.unlv.edu:rtds-1155"},"canonical_url":"https://search.dev.ndltd.org/etd/unlv/oai:oasis.library.unlv.edu:rtds-1155","repository":{"repo_id":"unlv","name":"University of Nevada - Las Vegas","base_url":"https://oasis.library.unlv.edu/do/oai/"},"display":{"title":"Sampling for volatile organic compounds from an aquitard: A field evaluation of screen length, purging method, and sampling time","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.).","abstract_html":"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.).","abstract_has_math":false,"creators":["Alduino, Amy Josephine"],"institution":"University of Nevada, Las Vegas","degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Geoscience","degree_department":null,"school":null,"contributors":["Steve Mizell"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1991,"date_issued":"1991-01-01T08:00:00Z","date_published":"1991-01-01T08:00:00Z","updated_at":"2026-07-24T05:24:07Z","subjects":[],"languages":["English"],"rights":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://oasis.library.unlv.edu/rtds/156"],"render_values":[{"text":"https://oasis.library.unlv.edu/rtds/156","href":"https://oasis.library.unlv.edu/rtds/156","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.25669/vv4r-mxsh","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Steve Mizell"]},{"key":"dc:creator","label":"Author","values":["Alduino, Amy Josephine"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["University of Nevada, Las Vegas"]},{"key":"dc:type","label":"Dc Type","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geoscience"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.25669/vv4r-mxsh","https://oasis.library.unlv.edu/rtds/156","https://oasis.library.unlv.edu/context/rtds/article/1155/viewcontent/uc.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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.)."]},{"key":"dc:format","label":"Dc Format","values":["pdf"]},{"key":"dc:title","label":"Title","values":["Sampling for volatile organic compounds from an aquitard: A field evaluation of screen length, purging method, and sampling time"]}]}],"canonical_facts":{"dc:contributor":["Steve Mizell"],"dc:creator":["Alduino, Amy Josephine"],"dc:description.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.)."],"dc:format":["pdf"],"dc:identifier":["10.25669/vv4r-mxsh","https://oasis.library.unlv.edu/rtds/156","https://oasis.library.unlv.edu/context/rtds/article/1155/viewcontent/uc.pdf"],"dc:language":["English"],"dc:publisher":["University of Nevada, Las Vegas"],"dc:rights":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Sampling for volatile organic compounds from an aquitard: A field evaluation of screen length, purging method, and sampling time"],"dc:type":["Text"],"thesis:degree_discipline":["Geoscience"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T05:24:07Z"}