Portable Diesel Engine ATCM - Fleet Calculators
This page last updated October 28, 2013
These calculations are for Portable Equipment, not Off-road mobile equipment.
Each calculator includes printable pages and a compliance statement page which can be mailed to the Air Resources Board.
The calculators also allow you to experiment with different turnover, repower, and retrofit strategies to plan for compliance with the Portable Diesel Engine ATCM.
Be advised that we are providing the calculators as a convenience. The ultimate responsibility for accuracy and compliance is yours.
You may encounter problems with engine family names which are not found in the calculator source data. The engine family name on your registration may not exactly match the one on your engine for a variety of reasons. If you encounter this problem or have any questions or comments about the calculators, please call the ARB staff listed below.
The fleet recordkeeping and reporting requirements are found in the Portable Diesel Engine ATCM, Section 93116.4
Each link opens an Excel calculator for the horesepower range indicated
These calculators are the same as those above except they contain space for entering up to 1000 engines
If your fleet contains only a few engines or you wish to do the calculations by hand, you can print these sheets
worksheet - under 175 bhp PDF
New short version calculator
for PERP registered engines only
and a maximum 20 engines in fleet
|calculator - short version|
Fleet Calculator Contact Information
For further information regarding the calculators, please contact Zuzana Vona at (916) 323-9688, Dave Brown at (916) 324-1129, Carol Carlson at (916) 445-1365, or James Aguila at (916) 322-5616. You may also email us.