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Stationary Irrigation Engines (Code 372)

Stationary Irrigation Engine

The Natural Resources Conservation Service (NRCS) is offering California growers and ranchers opportunities to apply new and innovative agricultural emission reduction practices and technologies that provide significant environmental benefits to our natural resources.

The Combustion System Improvement (372) practice improves air quality by addressing the resource concerns for particulate matter and ozone precursors by mitigating actual or potential emissions of oxides of nitrogen and/ or fine particulate matter from reciprocating internal combustion engines and related components. The California Air Resources Board (CARB) establishes emission limits for greater than 50 hp in-use agricultural engines and registration requirements for greater than 50 hp new and in-use agricultural engines.

The in-use agricultural engine emission limits require:

  • Tier 1 and Tier 2 engines not exceed Tier 4 certification standards for PM by the 2015-2016 timeframe, or 12 years after initial installation, whichever is later.

Real emission reductions are achieved when high- polluting diesel engines are replaced earlier than through normal turnover. Funding priorities are based on a screening and ranking process that considers the benefits of planned conservation practices, as identified by local, state and national priorities.

Program Guidelines – 372 – Combustion System Improvement Program Specifics

California growers and ranchers must meet EQIP eligibility requirements to qualify.

  • It is recommended that the participant consult with the local air quality authority to determine the permitting requirements and emissions standards imposed on stationary diesel engines before submitting an application. The participant is responsible for assuring all regulatory obligations are in place prior to receiving a payment.

The existing diesel engine is:

  • Currently in-use, fully functional, in good operating condition, bolted to a foundation or a platform permanently attached to a foundation, situated in its operating location, connected to the equipment it powers, and has useful life remaining.
  • A TIER 1 or TIER 2 diesel irrigation engine rated at least 50 break-horsepower (bhp). Not eligible are auxiliary engines mounted on farm equipment; emergency stand-by engines; portable engines mounted on trailers or skids that move from one location to another; or mobile engines that self-propel agricultural vehicles.

  • Used routinely and exclusively in California by the participant for at least the past 12 months.

The new diesel replacement engine is:

  • Replacing an existing diesel-powered irrigation engine.
  • Rated at least 50 bhp and within 125% of the existing engine horsepower rating. The new engine must be sized appropriately to conform to NRCS Practice Standard 533–Pumping Plant.
  • New and covered under the manufacturer’s warranty.
  • Verified as meeting the most current model- year California emission standards available. Certification is by California Air Resources Board Executive Order based on the applicable EPA engine family and off-road engine model description.

The new electric motor is:

  • Replacing an existing diesel-powered irrigation engine.
  • Rated at least 25 horsepower (hp) or 19 kilowatts (kw) and sized appropriately to conform to NRCS Practice Standard Code 533 – Pumping Plant. Priority is placed on installing new electric motors instead of new diesel engines, which essentially eliminates the air pollutants from the source.
  • New and covered under the manufacturer’s warranty.
  • The participant must not purchase, make payments toward, or take possession of any new engine or electric motor prior to receiving a fully executed contract.
  • The participant under contract must provide the NRCS field office with the applicable EPA engine family and engine model descriptions prior to purchasing the new diesel engine for emissions verification. Any new engine reporting a Family Emission Limit shall not exceed the applicable emission standards for any air pollutant.
  • ARB Engine Certifications may be found on-line at:
  • The participant installing a new electric motor instead of an engine must provide documentation from the local utility company for power installation or information that an adequate electric power supply is at the site.
  • To assure the emission reductions are quantifiable and real, the existing engine must be destroyed and scrapped at a California metal recycling facility. Recycling engine parts is not allowed. The participant must provide the NRCS field office with the appropriate documents of engine destruction.
  • A minimum two-year contract period is required. The participant initiates the project within one year. Once installed, the practice life is 10 years.

For More Information

For more information about the Environmental Quality Incentives Program (EQIP), please contact your local USDA Service Center, listed in the government section of the phone book under U.S. Department of Agriculture. Information is also available on the Internet at