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Revised Carbon Monoxide (CO) Standard for Class I and II Nonhandheld New Nonroad Phase 1 Small Spark-Ignition Engines
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[Federal Register: July 3, 1996 (Volume 61, Number 129)] [Proposed Rules] [Page 34778-34784] From the Federal Register Online via GPO Access [wais.access.gpo.gov]
ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 90 [FRL-5530-8] Revised Carbon Monoxide (CO) Standard for Class I and II Nonhandheld New Nonroad Phase 1 Small Spark-Ignition Engines AGENCY: Environmental Protection Agency (EPA). ACTION: Notice of proposed rulemaking.
SUMMARY: Today EPA is proposing a revision of the Phase 1 carbon monoxide (CO) emission standard for Class I and II new nonroad sparkignition (SI) engines at or below 19 kilowatts. Today's action would increase the standard from 469 grams per kilowatt-hour (g/kW-hr) to 519 g/kW-hr. This proposed action is necessary to address the CO emission difference between oxygenated and nonoxygenated fuels that was not reflected when the Agency previously set the CO standard for these nonhandheld engines in a final rule published July 3, 1995. This correction of the nonhandheld engine CO standard would ensure that the CO standard for manufacturers of Class I and II small SI engines used to power equipment such as lawnmowers is achievable and otherwise appropriate under the Clean Air Act and that it is technically feasible for manufacturers to certify their engine models to the Phase 1 emission standards and make them commercially available for the 1997 model year.
In addition, today's action proposes to give the Administrator the option to permit the use of open crankcases in engines used exclusively to power snowthrowers. This proposed change will give EPA the flexibility to allow certain engine manufacturers to certify engines to be used in snowthrowers without making technological changes that would severely impair the ability of the engine to function or that would be economically prohibitive. DATES: Written comments on this NPRM must be submitted by August 2, 1996. EPA will hold a public hearing on this NPRM sometime between [Insert date 15 days from date of publication] and August 2, 1996. If one is requested by July 15, 1996. ADDRESSES: Written comments should be submitted (in duplicate, if possible) to: EPA Air and Radiation Docket, Attention Docket No. A-96- 02, room M-1500 (mail code 6102), 401 M St., SW, Washington, D.C. 20460. Materials relevant to this rulemaking are contained in docket no. A-93-25 and docket no. A-96-02, and may be viewed from 8:00 a.m. until 5:30 p.m. weekdays. The docket may also be reached by telephone at (202) 260-7548. As provided in 40 CFR part 2, a reasonable fee may be charged by EPA for photocopying. Members of the public may call the contact person indicated below to find out whether a hearing will be held and if so, the exact location. Requests for a public hearing should be directed to the person indicated below. The hearing, if requested, will be held in Michigan. FOR FURTHER INFORMATION CONTACT: Laurel Horne, U.S. Environmental Protection Agency, 2565 Plymouth Road, Ann Arbor, MI 48105. Telephone: (313) 741-7803. FAX: (313) 741-7816. Electronic mail: horne.laurel@epamail.epa.gov
SUPPLEMENTARY INFORMATION: Regulated Entities Entities potentially regulated by this action are those which manufacture engines used in nonhandheld applications, such as lawnmowers, and those which manufacture engines used exclusively to power snowthrowers. Regulated categories and entities include:
Category Examples of regulated entities
Industry........................... Manufacturers of small (at or below 19 kW) nonroad engines used in nonhandheld applications such as lawnmowers. engines used exclusively to power snowthrowers. Exhaust Emission Standards [Grams per kilowatt-hour] Hydrocarbon of nitrogen monoxide nitrogen