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EPA/AR RIN: 2060-AK23 Publication ID: Fall 2005 
Title: NESHAP: Magnetic Tape Manufacturing Operations Residual Risk Standard 
Abstract: EPA developed technology-based standards for this source category under section 112(d) of the CAA. The current action, required by section 112(f) of the CAA, is to assess residual risks and develop additional emission standards, as necessary, to provide an ample margin of safety. The facilities covered by the 112(d) standard and under investigation in the project are Magnetic Tape coatings facilities that manufacture audio and video recording and computer information storage, and emit major source levels of air toxics. The magnetic tape coating process entails a mixture of magnetic (metal) particles, resins, and solvents applied to either a plastic film or paper. The HAP used in this industry include methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), toluene, toluene diisocyanate, ethylene glycol, methanol, xylenes, chromium, cobalt, ethylbenzene, and acetaldehyde. The most common HAP solvents are MEK (68 percent) and toluene (29 percent). The non-HAP solvents used in this industry include cyclohexanone, acetone, and isopropyl alcohol (IPA). The magnetic particles are combinations of iron, chrome, and cobalt. Particulate HAP emissions can result from handling of materials, cleaning of process equipment, and adding dry media to mix tanks during coating mix preparation. New processes for manufacturing magnetic tape products have been developed by at least one company in recent years. There are a total of six facilities manufacturing magnetic tape in the nation. Half of these are located in the State of Alabama. The residual risk analyses performed for this source category and the final determination to develop and promulgate additional standards for the source category is dependent on certain policy decisions. The EPA modeled each of the six facilities with magnetic tape manufacturing source category emission sources and found no facilities with a cancer risk at or above 1 in 1 million. The EPA also found the maximum noncancer risks from these facilities to be significantly below 0.2. The EPA believes that these six facilities constitute all of the emissions from this source category and that the assessment is likely to overestimate rather than underestimate risks. Therefore, EPA has determined that this source category currently presents an acceptable level of cancer and noncancer risks and provides an ample margin of safety. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 63   
Legal Authority: 42 USC 7412   
Legal Deadline:
Action Source Description Date
Other  Judicial    03/31/2006 
Final  Statutory  Court ordered deadline for final rule  12/15/2002 
Timetable:
Action Date FR Cite
NPRM-  10/00/2005    
Additional Information: SAN No. 4669;
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
Sectors Affected: 334613 Magnetic and Optical Recording Media Manufacturing; 33461 Manufacturing and Reproducing Magnetic and Optical Media 
Agency Contact:
Lynn Dail
Environmental Protection Agency
Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-01,
Research Triangle Park, NC 27711
Phone:919 541-2363
Fax:919 541-0824
Email: dail.lynn@epamail.epa.gov

Elaine Manning
Environmental Protection Agency
Air and Radiation
C539-03,
Research Triangle Park, NC 27711
Phone:919 541-5499
Fax:919 541-5689
Email: manning.elaine@epa.gov