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Title: Title III hazardous air pollutants


The author presents an overview of the key provisions of Title III of the Clean Air Act Amendments of 1990. The key provisions include the following: 112(b) -- 189 Hazardous Air Pollutants (HAP); 112(a) -- Major Source: 10 TPY/25 TPY; 112(d) -- Application of MACT; 112(g) -- Modifications; 112(I) -- State Program; 112(j) -- The Hammer; and 112(r) -- Accidental Release Provisions.

Publication Date:
OSTI Identifier:
Report Number(s):
TRN: IM9601%%93
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Resource Relation:
Conference: Petro-Safe `95 conference and exhibition, Houston, TX (United States), 31 Jan - 2 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Petro-safe `95: 6. Annual environmental, safety and health conference and exhibition for the oil, gas and petrochemical industries. Book 1; PB: 590 p.
Country of Publication:
United States

Citation Formats

Todd, R. Title III hazardous air pollutants. United States: N. p., 1995. Web.
Todd, R. Title III hazardous air pollutants. United States.
Todd, R. 1995. "Title III hazardous air pollutants". United States. doi:.
title = {Title III hazardous air pollutants},
author = {Todd, R.},
abstractNote = {The author presents an overview of the key provisions of Title III of the Clean Air Act Amendments of 1990. The key provisions include the following: 112(b) -- 189 Hazardous Air Pollutants (HAP); 112(a) -- Major Source: 10 TPY/25 TPY; 112(d) -- Application of MACT; 112(g) -- Modifications; 112(I) -- State Program; 112(j) -- The Hammer; and 112(r) -- Accidental Release Provisions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1995,
month =

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  • 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 mostmore » 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 vast 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
  • The 1990 amendments to the Clean Air Act may result in regulations limiting the amount of hazardous air pollutants (HAPS) emitted from coal-burning powerplants. Trace element data on 88 coal channel samples from producing beds (Pocahontas 3, 4, 6, and 8) in the Pocahontas coal field in Virginia and West Virginia indicate that, on a grams per million Btu as-received basis, these low-volatile bituminous coal beds have relatively low HAPS contents, except for Be and Co. Within the Pocahontas field, the Pocahontas 4 coal bed has the lowest mean values from Be, Cd, Co, Cr, Hg, and Pb. The Pocahontasmore » 8 coal bed has the lowest means for As, Hg, and Se and the Pocahontas 6 coal beds has the lowest mean for Mn.« less
  • Hazardous air pollutants (HAP`s) are discussed under the following outline: Clean Air Act Amendments of 1993; major sources of HAP`s; EPA promulgates standards; timing for industrial boilers - 7-10 yr; EPA study of public health standards and Hg emissions; EPA Interim Report to Congress, Nov. 1993; and lack of data, extensive variability, unknown design parameters, and operating conditions.
  • The Clean Air Act Amendments (CAAA) of 1990 are expected to impact both conventional and advanced power systems. Pressurized fluidized-bed combustion (PFBC) and other coal combined-cycle processes combined with high-temperature cleanup devices are environmentally friendly and economically attractive. Though PFBCs are beneficial because they can decrease the emission of sulfur and NO{sub x} species, and advanced combined-cycle systems that incorporate high-temperature cleanup devices are beneficial because they can enhance efficiency, the impact of these technologies on the emission of trace metals and certain organic compounds needs to be assessed. This paper compares (1) the Tidd PFBC demonstration plant with conventionalmore » pulverized coal- and cyclone-fired systems and (2) the Tidd plant advanced particulate filter with the performance of conventional electrostatic precipitators and baghouses. We also attempt to extrapolate the comparison to other advanced systems. Except for mercury, the PFBC at Tidd released less trace metals into the flue gas stream than the adjacent conventional pulverized-coal combustor, using the same coal. Similar to conventional power systems, hazardous air pollution emissions from advanced systems appear to be lower than the trigger level of 1990 CAAA, which requires maximum achievable control technologies.« less
  • On April 22, 1994, the EPA promulgated rules to regulate the emissions of certain organic hazardous air pollutants from the Synthetic Organic Chemical Manufacturing Industry (SOCMI) and seven other specific processes, including SB rubber, pesticide production and pharmaceutical production. These are all part of the major sources under section 112 of the Clean Air Act as amended in 1990. The HON (Hazardous Organic NESHAP) requires sources to achieve emission limits reflecting the application of the maximum achievable control technology (MACT). The rule regulates the emissions of 112 of the organic chemicals identified in the Act`s list of 189 hazardous airmore » pollutants at both new and existing SOCMI sources as well as the other seven sources. One of the specific sources to be controlled and regulated is the management of wastewater units. Wastewater includes process wastewater and maintenance wastewater. The regulations require control or treatment which is equivalent to the designated MACT. The designated MACT is a steam stripper. Radially Entrained Vapor Extraction (REVEX{trademark}) technology provides an innovative approach to achieve the required removal efficiencies in a unit which is significantly smaller and less costly than Steam Stripping. The wastewater is swirled through a gas porous tube; the stripping gas is entrained into the swirling water in the form of millions of minute bubbles which create an interphase transfer area which allows near instaneous transfer of the organic to the vapor phase. The primary advantages offered by Radially Entrained Vapor Extraction technology include: (1) High specific processing capacity -- 50 GPM/cubic foot. (2) The unit may be integrated into a process allowing control at the point of generation. (3) Totally enclosed treatment. (4) Minimal extraction gas, high efficiency. (4) Low operating cost for utilities and labor. (5) Low maintenance due to avoidance of fouling.« less