A truck undergoes a Periodic Smoke Inspection Program opacity test in Buellton, Calif. (Beryl Technologies via Twitter) Also, CARB randomly audits fleets, reviews on-site maintenance and inspection ...

The California Air Resources Board has approved amendments to toughen state standards on heavy truck smoke opacity limits as well as require motor carriers with two or more trucks to report their ...

MIDDLETOWN — Now that AK Steel Corp. has fixed the emissions from its Basic Oxygen Furnace at the Middletown Works, the combustion stack of the coke plant there is in alleged violation of regulations, ...

Fleet personnel can immediately determine if a diesel-powered truck will pass emission standards by using OTC’s Smoke Check 1667 portable diesel smoke opacity tester (No. RM1020C) from SPX Canada.