Appendix H 

Exhaust Retrofit Technologies 

H-1 

Emission Control Devices 

A. Exhaust Retrofit Technologies 

As of October 2008, ARB has verified the Diesel Emission Control Strategies (DECS) 

shown in the tables below. The on-road devices are shown in Table 1, and the off-road 

devices are shown in Table 2. The proposed regulation does not accept Level 1 device 

for compliance purposes, so only the Verified Level 3, greater or equal to 85 percent PM 

reduction, and Level 2, between 50 to 84 percent PM reduction, are shown. 

Additionally, passive DPF systems can increase emissions of NO2 out of the tailpipe. 

To address this, the ARB verification program limits the amount of NO2 a DECS may 

create and more devices may be added because of the prospect of the regulation. 

Table 1: Verified On-Road DECS (as of October 2008)

Product Name Technology 

Type 

PM 

Reduction 

NOx 

Reduction Applicability 

Cleaire Horizon DPF 85% N/A 

Most on-road diesel engines 

through 2006 model year; 

Certain MY 2006 and 1993 or 

older engines with OEM diesel 

oxidation catalysts; CARB 

diesel; biodiesel. 

Cleaire 

Longview 

Lean NOx 

Catalyst 

and DPF 

85% 25% 1993-2003 model year on-road; 

CARB diesel. 

Donaldson 

DPM DPF 85% N/A. 1993-2004 on-road; CARB diesel; biodiesel. 

Engine Control 

System 

Purifilter (Low 

Load) 

DPF 85% N/A 1994-2004 on-road; CARB 

diesel; biodiesel. 

Engine Control 

System 

Purifilter (High 

Load) 

DPF 85% N/A 1993-2006 on-road; CARB 

diesel; biodiesel. 

HUSS 

Umwelttechnik 

FS_MK 

DPF 85% N/A 

Most on-road diesel engines 

through 2006 model year; 

CARB diesel; biodiesel. 

International 

Truck and 

Engine 

Corporation 

DPX 

DPF 85% N/A. 1994-2003 on-road Navistar 

(International); CARB diesel. 
H-2 

Product Name Technology 

Type 

PM 

Reduction 

NOx 

Reduction Applicability 

Johnson 

Matthey 

Reformulated 

CRT 

DPF 85% N/A. 1994-2006 on-road; CARB 

diesel; biodiesel. 

Johnson 

Matthey EGRT EGR/DPF 85% 40% 

2000 International DT-466, 

2000 Cummins ISM 2001, 

Cummins ISB, 1998-2002 

Cummins ISC, 2001 Cummins 

ISL, 2001 MY DDC - 50, and 

2001 DDC - 60 on-road; CARB 

diesel. 

Donaldson 

Flow 

Through 

Filter 

50% N/A 1991-2002 on-road; CARB 

diesel; biodiesel. 

Environmental 

Solutions 

Worldwide 

Particulate 

Reactor 

DOC 50% N/A Select model years 1991-1997; 

biodiesel. 

Lubrizol 

PuriNOx 

Emulsified 

Fuel 50% 15% 1988-2003 on-road. 

Table 2: Verified Off-road DECS (as of October 2008) 

Product Name Technology 

Type 

PM 

Reduction 

NOx 

Reduction Applicability 

Caterpillar DPF 85% N/A 

Conditionally verified 

for 1996-2008 model 

years; off-road, 

rubber tired; CARB 

diesel. 

DCL International 

Inc. DPF 85% N/A 

Conditionally verified 

for 1996-2008 model 

year, rubber tired offroad; CARB diesel. 

HUSS 

Umwelttechnik 

FS_MK 

DPF 85% N/A 

Most off-road diesel 

engines through 

2006 model year; 

CARB diesel; 

biodiesel. 
H-3 

Product Name Technology 

Type 

PM 

Reduction 

NOx 

Reduction Applicability 

Rypos, Inc. HDPF/C Hybrid DPF 85% N/A 

Tier 3 off-road diesel 

engine standards; 

CARB diesel; 

biodiesel. 

Engine Control 

System AZ 

Purifier & Purimuffler

DOC + Alt 

Fuel 50% 20% 1996-2002 off-road; PuriNOx. 

Environmental 

Solutions Worldwide 

Particulate Reactor 

DOC 50% N/A Select model years 

1991-1997; biodiesel.

Air districts reported to ARB by August 31, 2008 deadline, and made available data on 

280 on-road retrofits funded through the Carl Moyer Program from 2004 to 2008. There 

are 5 Medium Heavy Duty and 275 Heavy Heavy Duty. The engine model year is the 

replacement model year engine for the repower with retrofit activities. A reported data 

sample is shown in Table 3. All of the devices are verified level 3. Table 4 lists some of 

the Carl Moyer projects in 2004 to 2005. 

Table 3: Sample of Air District Reported Data 

Equipment 

Activity Activity 

GVWR 

Class 

Engine 

Model Year Model Year 

Executed 

Contract Date Contract Date 

Verify 

Level 

retrofit MHD 1999 2007-05-30 3 
H-4 

Table 4: Sample of Carl Moyer Projects for Program Year 7 (2004-05) 

Air 

District

Carl 

Moyer 

Program 

Year 

Grantee Retrofit Devices CARB VER Level Vehicle Type Number of Devices Funds Applied to Device Engine Make E

Sac 

Metro 

7 (2004-

05) 

Sacramento 

Municipal 

Utility District 

Cleaire 

Longview 3 Other 1 585 Caterpillar 3126 2

Sac 

Metro 

7 (2004-

05) 

Sacramento 

Municipal 

Utility District 

Cleaire 

Longview 3 Other 1 4,600 Caterpillar 3126 

Sac 

Metro 

7 (2004-

05) 

Sacramento 

Municipal 

Utility District 

Cleaire 

Longview 3 Other 1 2,480 Caterpillar 3126 

Sac 

Metro 

7 (2004-

05) 

Sacramento 

Municipal 

Utility District 

Cleaire 

Longview 3 Other 1 2,645 Caterpillar 3126 

Sac 

Metro 

7 (2004-

05) 

Sacramento 

Municipal 

Utility District 

Cleaire 

Longview 3 Other 1 2,140 Caterpillar 3126 2
H-5 

Air 

District

Carl 

Moyer 

Program 

Year 

Grantee Retrofit Devices CARB VER Level Vehicle Type Number of Devices Funds Applied to Device Engine Make E

Sac 

Metro 

7 (2004-

05) 

Sacramento 

Municipal 

Utility District 

Cleaire 

Longview 3 Other 1 1,550 Caterpillar 3126 

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 1,606 Caterpillar 3126 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 2,411 Caterpillar 3126 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 2,962 Mercedes Benz 906 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 1,129 Caterpillar 3126 

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 1,964 Caterpillar 3126 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 2,616 Caterpillar C12 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 3,973 Caterpillar C12 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 1,768 International 7.3L 2

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 1,888 International 7.3L 2
H-6 

Air 

District

Carl 

Moyer 

Program 

Year 

Grantee Retrofit Devices CARB VER Level Vehicle Type Number of Devices Funds Applied to Device Engine Make E

Sac 

Metro 

7 (2004-

05) 

County of 

Sacramento 

Cleaire 

Longview 3 Other 1 3,683 Caterpillar C10 2

South Coast 

7 (2004-

05) 

City of LA 

Environmental 

Affairs Dept 

Johnson 

Matthey 

CCRT or 

CRT 

3 SNG Refuse Hauler 41 8,500 Cummins L Series 8.9L 2

South Coast 

7 (2004-

05) 

Norwalk La 

Mirada USD 

Cleaire 

Longview 3 

School District 

Maintenance 

Vehicle 

2 18,000 Cummins, B5.9 

South Coast 

7 (2004-

05) 

Cummins Cal 

Pacific 

Cleaire 

Longview 3 Transfer Truck 9 22,000 Cummins, M-11 

South Coast 

7 (2004-

05) 

SSA 

Terminals Inc. 

Donaldson 

DCM DOC 1 Side/Top Pick 1 3,050 Cummins QSB 5.9 2

South Coast 

7 (2004-

05) 

SSA 

Terminals Inc. 

Donaldson 

DCM DOC 1 Side/Top Pick 4 3,050 Cummins QSM 11C 2

Bay 

Area 

7 (2004-

05) 

Waste 

Management, 

Inc 

Cleaire 

Longview 3 

Refuse 

Transfer 

Truck 

10 19,000 Cummins ISM 2

Bay 

Area 

7 (2004-

05) FedEx Freight Cleaire Longview 3 Delivery Truck 1 19,000 Cummins 15X 2

Bay 

Area 

7 (2004-

05) 

Blueline 

Transfer, Inc. 

Cleaire 

Longview 3 

Refuse 

Transfer 

Truck 

1 19,000 Cummins N14 
H-7 

Table 5 shows on-road vehicle (and equipment) or exhaust retrofit projects completed 

or underway worldwide. The projects are organized by geographical location, the 

sponsor of the project, and project timeframe. A description of each project is given 

(Emissions Advantage, 2005; Environment Canada, 2004; Ministry of Environment, 

2004; U.S. EPA, 2005; DieselNet, 2002). 

Table 5: Worldwide Retrofits Projects 

LOCATION PROGRAM SPONSOR TIME FRAME DESCRIPTION 

Riverside, 

California 

Ralph’s Grocery / BP 

ARCO EC-Diesel 

Technology Validation 

2001-2002 

10 of Ralph’s Class 8 

Diesel Trucks retrofitted 

with DPFs 

Los Angeles, 

California 

Los Angeles City 

Sanitation Fleet/BP 

ARCO EC Diesel 

Technology Validation 

2001-2002 

10 Peterbilt refuse 

haulers and Kenworth 

T-800 dump trucks 

San Francisco 

Bay Area, 

California 

Metropolitan 

Transportation 

Commission, Bay Area 

Air Quality Management 

District 

2002-2006 1,700 Diesel Transit 

Buses 

Sacramento, 

California 

Sacramento 

Metropolitan Air Quality 

Management District 

(SMAQMD), Raley’s 

Grocery, and 

Sacramento Emergency 

Clean Air and 

Transportation (SECAT) 

2008- 

16 Class 8 Diesel 

Grocery Trucks 

retrofitted with SCRT 

Seattle, 

Washington 

City of Seattle Municipal 

Fleet Program 2001-2003 

Heavy Duty Diesel 

municipal vehicles, 

including utility trucks 

and dump trucks - 215 

DOCs and 10 DPFs 

retrofitted 

Houston, Texas 

Houston, TX NOx 

Reduction Program – 

Diesel Demonstration 

Project 

2001 63 refuse trucks 

retrofitted with DPFs 

St. Louis, 

Missouri 

City of St. 

Louis/American Lung 

Association 

2004 44 refuse trucks 

retrofitted with DOCs 

CharlotteMecklenburg 

County, NC 

Mecklenburg County Air 

Quality Agency/Charlotte 

Mecklenburg Schools 

2004 58 School buses 

retrofitted with DOCs 
H-8 

LOCATION PROGRAM SPONSOR TIME FRAME DESCRIPTION 

Boston, 

Massachusetts 

Boston Public 

Schools/Waste 

Management/Mystic 

Exelon 

2004 85 Freightliner buses 

retrofitted with DPFs 

Region of 

Waterloo, 

Canada 

Public Health 

Department 2003- 

Purchased 30 new 

buses equipped with 

DOCs and 18 new 

buses equipped with 

DPFs 

Santiago, Chile 

CONAMA/UN 

Environment 

Program/UN 

Development 

Program/Chile’s National 

Petroleum Company 

2004-2006 2,000 transit buses 

Beijing, China 

U.S. EPA/Beijing 

Environmental 

Protection Bureau 

(EPB)/China's State 

Environmental 

Protection 

Administration (SEPA) 

2005-2006 

25 - 30 city buses 

installed with emission 

control equipment 

Seoul 

metropolitan 

region, Korea 

Ministry of Environment 2004 

Installation of 520 DPFs 

and 1,098 DOCs on 

government owned 

diesel vehicles 

Stockholm, 

Gothenburg and 

Malmoe, Sweden

Cities through the 

Environmental Zones 

regulation 

1996 

3,000 heavy duty 

vehicles retrofitted with 

emission control 

systems 

B. References 

ARB, 2007. California Air Resources Board. Staff Report: Initial Statement of Reasons 

for Proposed Rulemaking, Proposed Amendments the Verification Procedure, Warranty 

and In-Use Compliance Requirements for In-Use Strategies to Control Emissions from 

Diesel Engines. December 7, 2007. 

DieselNet, 2002. DieselNet. Sweden: Environmental Zones Program (Trucks and 

Buses). April 2002. 

http://www.dieselnet.com/standards/se/zones.html

Emission Advantage, 2005. Emission Advantage, LLC. Final Draft Diesel Draft Diesel 

Retrofit Technology and Program Experience, Appendix B. July 29, 2005. 
H-9 

Environment Canada, 2004. Environment Canada. Low Sulphur Diesel and Transit Bus 

Retrofits Lessons Learned by the Region of Waterloo. October 10, 2004. 

http://www.ec.gc.ca/cleanair-irpur/CAOL/OGEB/ecology/LSF/LowSulphur_diesel_e.cfm

Ministry of Environment, 2004. Ministry of Environment of Republic of Korea. MoE 

Launches Pilot Emission Reduction Project on Diesel Vehicles. May 11, 2004. 

http://eng.me.go.kr/docs/news/press_view.html?seq=264

U.S. EPA, 2005. United States Environmental Protection Agency. Diesel Retrofit 

Project in China. November 10, 2005. 

http://www.epa.gov/OMS/retrofit/china2.htm