Verification Procedure - Level 3

This page last reviewed January 25, 2010.

Level 3 verification is for those technologies achieving at least an 85 percent or greater reduction in particulate matter or less than 0.01 g/bhp-hr emission level. The current verified technologies are listed below. Please read the verification letter(s) below which provide additional information on the applicability of the device for your particular engine. Click on the associated attachment for each system to see a list of engine families for which devices have been approved (engine series names are provided for reference in most cases). For more detailed information or to purchase the device, please contact the device manufacturer directly. New information will be posted as additional systems are verified. Please check periodically for updates.

Caterpillar

The Air Resources Board verified the Caterpillar Diesel Particulate Filter as a Level 3 Plus passively regenerated diesel emission control system for use with all off-road equipment powered by certain off-road diesel engines with model years between 1996 and 2005. Approved engines are certified to a particulate matter emission level equal to or less than 0.2 grams per brake horsepower-hour, are rated to 175 horsepower through 600 horsepower, and are not equipped with exhaust gas recirculation systems. Specific conditions for which the Caterpillar DPF has been approved may be found in the Executive Order below.

Cleaire Allmetal

The Air Resources Board has conditionally verified the Cleaire Allmetal diesel retrofit system for certain 1996 through 2010 model year diesel engines in both tracked and rubber-tired off-road vehicles.  The Allmetal system reduces emissions of diesel particulate matter by at least 85 percent and is designated as a Level 3 plus system.  The primary components of the passively regenerated Allmetal system include a diesel oxidation catalyst, a metal diesel particulate filter, and a driver notification and data logging system.  The Allmetal system is compatible with off-road vehicles using diesel fuel that contains up to 20 percent biodiesel.  Specific conditions for which the Allmetal system has been approved may be found in the conditional verification letter below.

Cleaire Horizon

The Air Resources Board has extended the on-road verification of the Cleaire Horizon Electric Particulate Filter (Horizon). The Horizon is now verified as a Level 3 Plus diesel emission control system for use with most four-stroke on-road diesel engines up through and including the 2006 model year having displacements up to 15 liters. Diesel engines of model year 2006 and 1993 or older with original equipment diesel oxidation catalysts are now included in this verification provided certain conditions are met. The Horizon uses a silicon carbide wall-flow filter with an electric heater for regeneration to achieve an 85 percent reduction in emissions of diesel particulate matter. Specific conditions for which the Horizon has been approved may be found in the Executive Order.

The Air Resources Board conditionally verified the Cleaire Horizon Electric Particulate Filter for use with all off-road diesel engines through the 2007 model year certified to a particulate matter emission level equal to or less than 0.4 grams per brake horsepower-hour having displacements up to 15 liters, except those equipped with either diesel oxidation catalysts or exhaust gas recirculation systems. The Horizon uses a silicon carbide wall-flow filter with an electric heater for regeneration to achieve an 85 percent reduction in emissions of diesel particulate matter. Specific conditions for which the Horizon has been approved may be found in the conditional verification letter.

Cleaire Lonestar

The Air Resources Board has conditionally verified the Cleaire Lonestar diesel retrofit system for certain 1996 through 2009 model year diesel engines in rubber-tired off-road vehicles.  The Lonestar reduces emissions of diesel particulate matter by at least 85 percent and is designated as a Level 3 plus system.  The Lonestar also reduces emissions of oxides of nitrogen (NOx) by 40 percent.  The primary components of the Lonestar include a catalyzed silicon carbide wall-flow filter and a lean NOx catalyst.  The Lonestar system is compatible with off-road vehicles using diesel fuel that contains up to 20 percent biodiesel.  Specific conditions for which the Lonestar system has been approved may be found in the conditional verification letter below.

Cleaire Longview

The Air Resources Board has verified the reformulated Cleaire Longview diesel retrofit system for certain 1993 through 2006 model year heavy-duty diesel engines in on-road vehicles. The Longview reduces emissions of diesel particulate matter by at least 85 percent and complies with both the 2009 limit on emissions of nitrogen dioxide and the unidirectional design requirements that are effective January 1, 2010.  As such, it is designated as a Level 3 Plus system. The Longview also reduces emissions of oxides of nitrogen (NOx) by 25 percent. The primary components of the Longview include a catalyzed silicon carbide wall-flow filter and a lean NOx catalyst. The Longview system is compatible with on-road vehicles using diesel fuel that contains up to 20 percent biodiesel. Specific conditions for which the Longview system has been approved may be found in the Executive Orders below.

Cleaire Phoenix

The Air Resources Board has conditionally verified the Cleaire Phoenix diesel retrofit system for certain 1996 through 2010 model year diesel engines in rubber-tired off-road vehicles. An on-road certified engine used in rubber-tired off-road vehicles is also included the verification. The Phoenix reduces emissions of diesel particulate matter by at least 85 percent and is designated as a Level 3 plus system. The primary components of the actively regenerated Phoenix system include a silicon carbide wall-flow filter, an exhaust flow conditioner, a diesel-fueled burner assembly, and a system controller. The Phoenix system is compatible with off-road vehicles using diesel fuel that contains up to 20 percent biodiesel. Specific conditions for which the Phoenix system has been approved may be found in the conditional verification letter below.

Cleaire Vista

The Air Resources Board has verified the Cleaire Vista diesel retrofit system for certain 1993 through 2006 model year heavy-duty diesel engines used in on-road vehicles. The Vista system reduces emissions of diesel particulate matter by at least 85 percent and is designated as a Level 3 plus system. The primary components of the actively regenerated Vista system include a silicon carbide wall-flow filter, an exhaust flow conditioner, a diesel-fueled burner assembly, and a system controller. The Vista system is compatible with on-road vehicles using diesel fuel that contains up to 20 percent biodiesel. Specific conditions for which the Vista system has been approved may be found in the Executive Order below.

DCL MINE-X Sootfilter

The Air Resources Board has verified the DCL Mine-X Sootfilter system for certain 1996 through 2009 model year off-road diesel engines rated to between 100 and 1000 horsepower. The Mine-X Sootfilter system reduces emissions of diesel particulate matter by at least 85 percent and is designated as a Level 3 Plus system. The primary components of the Mine-X Sootfilter include a catalyzed flow-through filter, a catalyzed diesel particulate filter, and a back pressure monitor. Specific engine families and conditions for which the Mine-X Sootfilter system has been approved may be found in the Executive Order below.

Dinex DiSiC

The California Air Resources Board (ARB) has verified the Dinex DiSiC (Level 3 Plus) diesel particulate filter, which can be used to comply with the Ultra-Low Emission Transport Refrigeration Unit (ULETRU) In-Use Performance Standards on most trailer TRUs using 1999 through 2005 model year engines. The Dinex DiSiC consists of a catalyzed silicon carbide filter substrate in a filter assembly module, inlet, outlet, exhaust tubes, flexible parts, mounting brackets, and insulation. An electronic monitoring system measures and logs exhaust temperature, backpressure, and alarms. The warning system includes a series of LED lights to provide backpressure warning for filter cleaning. TRU owners should read about the specific conditions for which the DiSiC has been approved in the Executive Order (EO). Specific engine models and families that apply are listed in the EO’s attachment below.

Donaldson LNF

The Air Resources Board has verified the Donaldson Low NO 2 (LNF) System for specific 1993 through 2006 model year diesel engines used in on-road applications. All of these engines are four-stroke, turbocharged, and were certified in California to the 0.1 gram per brake horsepower-hour (g/bhp-hr) particulate matter (PM) emission standard when new. The LNF System employs a catalyzed pre-filter and a catalyzed diesel particulate filter with a back pressure monitor to achieve an 85 percent reduction in particulate matter emissions, qualifying it for Level 3 plus verification. Specific engine families and conditions for which the LNF System has been approved may be found in the Executive Order and attachment below.

Donaldson LXF

The Air Resources Board has verified the Donaldson Low NOx (LXF) Muffler System for select 2002 through 2006 model year diesel engines used in on-road applications. All of these engines are four-stroke, turbocharged, and have certified oxides of nitrogen emissions less than 3.0 grams per brake horsepower-hour (g/bhp-hr), as well as were certified in California to the 0.1 g/bhp-hr particulate matter (PM) emission standard when new. The LXF System employs a catalyzed pre-filter and a catalyzed diesel particulate filter with a back pressure monitor to achieve an 85 percent reduction in particulate matter emissions, qualifying it for Level 3 plus verification. Specific engine families and conditions for which the LXF System has been approved may be found in the Executive Order and attachment below.

Donaldson SEF

The Air Resources Board has verified the Donaldson Semi-Active Electric Filter (SEF) Muffler System for specific 1991 through 2006 model year diesel engines used in on-road applications. All of these engines are four-stroke, turbocharged or naturally aspirated, and were certified in California to the 0.25 gram per brake horsepower-hour (g/bhp-hr) particulate matter (PM) emission standard when new. The SEF Muffler System employs a diesel oxidation catalyst, heating element and an uncatalyzed diesel particulate filter with a back pressure monitor to achieve an 85 percent reduction in particulate matter emissions, qualifying it for Level 3 plus verification. Specific engine families and conditions for which the SEF Muffler System has been approved may be found in the Executive Order and attachment below.

Engine Control Systems Combifilter