# National Emission Standards for Hazardous Air Pollutants and Control Techniques Guideline Document for Source Categories: Aerospace Manufacturing and Rework Facilities
> **Rule** · Final rule and release of final control techniques guideline (CTG) document. · Published 1998-03-27 · Effective 1998-03-27 · 63 FR 15006
## Document
- **Document number:** 98-6999
- **Category:** air-emissions
- **Federal Register citation:** 63 FR 15006
- **CFR reference:** 40 CFR 9
- **Publication date:** 1998-03-27
- **Effective date:** 1998-03-27
- **EPA docket:** AD-FRL-5978-4
## Abstract

This action finalizes several amendments to the national emission standards for hazardous air pollutants (NESHAP) for aerospace manufacturing and rework facilities proposed in the Federal Register on October 29, 1996 (61 FR 55842). The amendments include: Corrections to several references in the rule; revisions and additions to definitions; clarification of the applicability of the cleaning operations standards; clarification of the applicability of the rule to space vehicles; addition of standards for Type I chemical milling maskants; addition of a test method for determining the filtration efficiency of dry particulate filters; revision of standards for new and existing sources using dry particulate filters to control emissions from topcoat and primer application and depainting operations; addition of an exemption for certain water-reducible coatings; addition of an exemption from inorganic HAP requirements for hand-held spray can applications; addition of an essential use exemption for cleaning solvents; clarification of compliance dates; clarification of the applicability of new source MACT to spray booths; clarification and addition of emissions averaging provisions; revision of the requirements for new and existing primer and topcoat application operations; clarification of monitoring requirements for dry particulate filter usage; revision of the standard for depainting operations; addition of a cross reference to requirements in the General Provisions in subpart A of part 63; addition of appendix A to this subpart containing definitions for specialty coatings; miscellaneous changes to the proposed amendatory language; and minor technical corrections, including correction of the OMB tracking number in 40 CFR part 9 (Section 9.1), that were not part of the October 29, 1996 proposal. Today's action takes final action on all of these amendments.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/03/27/98-6999/national-emission-standards-for-hazardous-air-pollutants-and-control-techniques-guideline-document)
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