Emissions Testing: Indoor Applications

Many factors must be considered for indoor usage of LP, Gas, or Diesel forklifts for inside application.  This consideration is needed is due to the risk of dangerous emissions from the burning of fuels. The danger is even more present when the building, in which the applications are taking place, are not up to date with ventilation requirements.

Use of LPG truck(s) in a poorly ventilated building

Running a LPG truck in an unventilated building should certainly be avoided. The OSHA standard for CO exposure is 50ppm during an 8 hour period. If a building has no ventilation, noxious fumes can build up and cause sickness and/or death. Air should be tested regularly as indicated in OSHA 1910.146/ title 29. Ventilation is the very first thing we check for, by looking at the building, on any emission inspection service request. In many cases, emission issues relate to the misapplication of equipment.

Customers most often do not think about lift truck emission until someone, unfortunately, gets sick. However, emission testing should be promoted wherever applicable. Here at Fallsway, emission testing is a Value Added Service while performing the routine Planned Maintenance. It is critical for all indoor LP, Gas and Diesel trucks to be properly maintained to keep your workers in safe conditions.

Standards for machine built prior to CARB

Usually fall with the criteria below:

Carbon Dioxide 13%/15%

Carbon Monoxide .5%/ 1.5%  (.5% difficult for non-fuel injection non-computer controlled engines to attain)

Hydrocarbons 75 / 125 PPM

Nitrogen Oxides 2,000 / 3,000 PPM

Oxygen 1% / 3%.

Standards for Post CARB


The following is an example of Emission Control Information (Post CARB Tier II)tagged on an engine that is CARB certified:

Emmission 2

With non-CARB and CARB Tier I engines, we would suggest a program with annual testing for any machine running indoors 75-100% of its run time. As engines are now requiring fewer tune-ups,  it can also ensure that an engine is running at its peak performance. CARB Tier III  may reduce the opportunity to sell as its monitoring systems are much more sophisticated, and will generally experience a fault by illuminating a MIL (malfunction indicator light)  when out of spec. However, we have been requested as a safeguard to test a Tier III lift truck so the customer has proof of its emission output when reporting back to their Safety Department.

Our 5 Gas infrared analyzer with portable printer provides a professional and easy to read report.   Not properly testing emissions can result in bad press, whether the building is well-ventilated or not. Everyone is trying to minimize their OSHA lost time exposure. It’s easy to see what would happen to a business if it had numerous employees go home for an extended period or, worst yet, hospitalized due to poor ventilation.

Contact us with any questions or call 1-800-458-7941

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