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Title: Title III delisting of ethylene glycol monobutyl ether -- An assessment of emissions and health effects of a hazardous air pollutant

Section 112(b)(3)(c) of the Clean Air Act Amendments states that a substance may be deleted from the hazardous air pollutant (HAP) list if ``...there is adequate data on the health and environmental effects of the substance to determine that emissions, ambient concentrations, bioaccumulation or deposition of the substance may not reasonably be anticipated to cause any adverse effects to the human health or adverse environmental effects.`` As part of the HAP delisting process, EPA has suggested identifying and evaluating a representative subset of all emitting sources to determine whether their emissions pose a potential threat to human health. In most cases, measurements of HAPs in ambient air beyond these facility`s fencelines have not been conducted. However, chemical emission data for these facilities are typically available or can be estimated using engineering calculations. In place of ambient measurements, emission information and modeling are commonly used to assess off-site exposures and risks. In the process of preparing a Title III delisting petition to modify the glycol ethers HAP category, the authors developed two new modeling tools which, when used in conjunction with the EPA`s tiered modeling approach, streamlined the source evaluation process. This innovative process enabled them to screen out the vastmore » majority of facilities for which there are no significant human health risks, and allowed them to focus their efforts and resources on those few emission sources requiring detailed, site-specific dispersion modeling. This paper discusses the emissions database, use of the screening tools, the results of the assessment, and a comparison to the EPA`s tiered approach for assessing the risks due to sources of HAPs.« less
Authors:
; ; ;  [1] ; ;  [2] ;  [3]
  1. McLaren/Hart-ChemRisk, Portland, ME (United States)
  2. Chemical Manufacturers Association, Arlington, VA (United States)
  3. EarthTech, Inc., South Portland, ME (United States)
Publication Date:
OSTI Identifier:
682210
Report Number(s):
CONF-980632--
TRN: IM9942%%195
Resource Type:
Conference
Resource Relation:
Conference: 91. annual meeting and exhibition of the Air and Waste Management Association, San Diego, CA (United States), 14-18 Jun 1998; Other Information: PBD: 1998; Related Information: Is Part Of Proceedings of the 91. annual meeting and exhibition. Bridging international boundaries: Clean production for environmental stewardship; PB: [5000] p.
Publisher:
Air and Waste Management Association, Pittsburgh, PA (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; AIR POLLUTION; CLEAN AIR ACTS; HEALTH HAZARDS; BUTYL ETHER; MATHEMATICAL MODELS; POLLUTION SOURCES; DATA BASE MANAGEMENT