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50+ Hp Portable Engines - Replacement Dates

  Ag Engine Registration Program


As a result of the Airborne Toxics Control Measure (ATCM) for Stationary Compression Ignition Engines, which was amended by the Air Resources Board (ARB) on November 2006, the District was required to develop a registration program for compression ignition (diesel) ag engines greater than 50 horsepower.

At the July 9, 2008 meeting, the Board approved District Rule 11.3 Agricultural Engine Registrations.  This rule requires that each engine (excluding mobile equipment such as tractors) greater than 50 hp used in an agricultural operation obtain a registration with the District by September 2, 2008. The District enacted an informal amnesty period until June 1, 2009 to conduct further outreach and provide farmers and ranchers with additional time to register their engines.  Now that the amnesty period has ended, qualifying non-registered engines found by the District in operation or at a location where they could be operated, will be subject to a notice of violation and monetary penalty.  However, persons who voluntarily approach the District to register their non-registered engines will not be cited for a violation.  Engine registration forms can be found at: http://www.ysaqmd.org/permits-forms-apps.php

If you have a registered stationary engine and are operating it in a new location, you are required to notify the District.  Use Form AG4 to report all new operating locations.

The purpose of the registration program is to enforce the emission standards of the ATCM, which requires that older diesel engines be replaced over time.  The ATCM requires that diesel engines which are not EPA-certified (Tier 0) must be replaced in 2010/2011 depending upon horsepower and Tier 1 and Tier 2 diesel engines must be replaced in 2014/2015.  The ATCM does not have any provisions or exemptions for limited use engines – the deadlines apply regardless of how much (or how little) the engine is actually used.

Limited Use Update (December 2010)

At the December 8, 2010 meeting, the District’s Governing Board adopted amendments to District Rule 11.3 to extend the replacement deadline for two newly defined categories of engines: “intermittent-use” and “low-use”.  To qualify for either type of relief, the engine owner/operator must apply to modify their registration (using Form AG5), must keep records of actual use, and must also meet the definition of both “remote location” and “resident” engines.  The deadline for establishing residency for non-registered engines closes March 8, 2011.  For definitions of each of these terms, please refer to Rule 11.3 Agricultural Engine Registrations.

For additional information about the ag engine registration program, please contact Jon Gildersleeve at (530) 757-3650

Rule for 50> HP Diesel Portable Engines

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