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Asbestos monitoring and regulation in public drinking-water supplies; a case history from North Carolina

Jeffrey C. Reid and Robert H. Carpenter
Asbestos monitoring and regulation in public drinking-water supplies; a case history from North Carolina (in A paradox of power; voices of warning and reason in the geosciences, Charles W. Welby (editor) and Monica E. Gowan (editor))
Reviews in Engineering Geology (1998) 12: 89-96

Abstract

Vulnerability assessments of the potential for asbestos contamination in public water supplies provide a basis for states to grant waivers from compliance monitoring requirements of public water supply systems if they can demonstrate they are not vulnerable under final U.S. Environmental Protection Agency (EPA) rulings published in the Federal Register. Land area of geologic units of North Carolina as represented on the 1:500,000-scale state geologic map in digital format and published geologic maps provide the technical basis for waivers for compliance monitoring and associated expensive analytical laboratory testing. These data show that only 3.68% of North Carolina"s land area of 18,790 square km (48,666 square mi) is underlain by rocks that are potentially hosts for asbestiform minerals. We assumed the EPA would follow the initiative of the Occupational Safety and Health Administration (OSHA) and remove nonasbestiform anthophyllite, tremolite, and actinolite from inclusion in the definition of asbestos. We concluded that the portion of North Carolina likely to contain any chrysotile asbestos would be reduced to 0.77% of land area. Ultramafic rocks that have a higher probability of chrysotile occurrences comprise only 0.07%, or 33.8 square mi of land surface in North Carolina. With additional investigation to delineate watersheds in which chrysotile susceptible rocks occur, the regulatory agency exempted 73 of North Carolina"s 100 counties from asbestos testing of surface water supply intakes. Sixty-eight percent (3,493) of the state"s surface water supply intakes were exempted from unnecessary testing, saving taxpayers at least $368,000; this is about one-third of the North Carolina Geological Survey"s annual appropriated budget. Author staff time to perform the work leading to the conclusion was about two person-weeks at a taxpayer cost of about $2,000.


ISSN: 0080-2018
EISSN: 2169-799X
Coden: GAEGA4
Serial Title: Reviews in Engineering Geology
Serial Volume: 12
Title: Asbestos monitoring and regulation in public drinking-water supplies; a case history from North Carolina
Title: A paradox of power; voices of warning and reason in the geosciences
Author(s): Reid, Jeffrey C.Carpenter, Robert H.
Author(s): Welby, Charles W.editor
Author(s): Gowan, Monica E.editor
Affiliation: North Carolina Geological Survey, Raleigh, NC, United States
Affiliation: North Carolina State University, Department of Marine, Earth, and Atmospheric Sciences, Raleigh, NC, United States
Pages: 89-96
Published: 1998
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 0-8137-4112-2
References: 14
Accession Number: 2003-042459
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch map
N33°49'60" - N36°34'60", W84°15'00" - W75°30'00"
Secondary Affiliation: GeoLogic Company, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200314
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