Ag Engine Registration
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
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:
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
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
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