The California Air Resources Board (ARB) posted a succinct 25-slide tutorial on the fleet requirements of its large spark-ignition (LSI) engine regulation on 15 September.

"I use the slides in my presentations on the requirements of the regulation and thought that they might be useful to operators visiting the LSI page to better understand the requirements of the LSI regulations," says Mark Williams, air pollution specialist with the zero emissions vehicle implementation section in the mobile source control division of Sacramento-based ARB.

The regulation pertains to off-road LSI farm, construction and industrial equipment with engines of more than 25 horsepower using gasoline, liquefied petroleum gas or an alternative fuel. Applications include engines for forklifts, specialty vehicles, airport service vehicles, large turf care equipment, portable generators and an array of other agricultural, construction, and general industrial equipment outside the jurisdiction of the US Environmental Protection Agency to control new farm and construction equipment under 175 horsepower.

"The slides contain images to help operators understand which classes of forklifts are, and are not, part of the 'forklift' definition," Williams says. "They also contain images of typical engine labels."

In his presentations, Williams mentions "Nett, Papé and Raymond as examples of available third-party calculators but with the caveat that I have not evaluated them and that I am not endorsing them. I will evaluate those calculators and others that I become aware of when my schedule allows and will then place more prominent links to them on the LSI page."

Williams was referring to calculators from emission control equipment manufacturer Nett Technologies Inc of Mississauga, Ontario, Canada and forklift dealerships Papé Group Inc of Eugene, Oregon and Raymond Handling Solutions Inc of Santa Fe Springs, California (Forkliftaction.com News #427).