SACRAMENTO - The California Air Resources Board (ARB) fined the Imperial Irrigation District $45,375 for operating its truck fleet and other diesel equipment in conflict with air quality regulations, according to a release from the ARB.

ARB investigators found that the Imperial Irrigation District neglected to install particulate filters on its trucks and to record smoke emissions, as required by California law. The district also failed to report its diesel equipment being used in off-road activities, the board stated.

The ARB requires all operators of diesel equipment, both businesses and public agencies, to:

• Install best available emissions control technology, based on the model year of the engine;

• Periodically test and record smoke emissions; and

• Report all off-road vehicles in use, and label them with engine identification numbers.

The Imperial Irrigation District has agreed to retrofit all vehicles and submit proof of compliance to ARB. The district will also instruct employees operating diesel equipment to abide by idling regulations.

Of the $45,000 paid, $34,000 will go to the California Air Pollution Control Fund, which provides funding for projects and research to improve California's air quality; $11,000 will go to the Palomar Community College Foundation to support their diesel technology program and, specifically, instruction in diesel engine service and maintenance, according to the release.

The Imperial Irrigation District is a public agency that provides water and energy services to communities in Southern California.