WAC (7/2/02 1:12 PM)[ 1 ]

Chapter 173-422 WAC

MOTOR VEHICLE EMISSION INSPECTION 

Last Update: 6/3/02 

WAC

173-422-010 Purpose. 

173-422-020 Definitions. 

173-422-030 Vehicle emission inspection requirement. 

173-422-031 Vehicle emission inspection schedules. 

173-422-035 Registration requirements. 

173-422-040 Noncompliance areas. 

173-422-050 Emission contributing areas. 

173-422-060 Gasoline vehicle emission standards. 

173-422-065 Diesel vehicle exhaust emission standards. 

173-422-070 Gasoline vehicle exhaust emission testing procedures. 

173-422-075 Diesel vehicle inspection procedure. 

173-422-090 Exhaust gas analyzer specifications. 

173-422-095 Exhaust opacity testing equipment. 

173-422-100 Testing equipment maintenance and calibration. 

173-422-120 Quality assurance. 

173-422-130 Inspection fees. 

173-422-145 Fraudulent certificates of compliance/acceptance. 

173-422-160 Fleet and diesel owner vehicle testing requirements. 

173-422-170 Exemptions. 

173-422-175 Fraudulent exemptions. 

173-422-190 Emission specialist authorization. 

173-422-195 Listing of authorized emission specialists. 

DISPOSITION OF SECTIONS FORMERLY 

CODIFIED IN THIS CHAPTER

173-422-080 Vehicle inspection data handling procedures. [Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and 

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-080, filed 11/23/83, effective 1/2/84. Statutory Authority: RCW 

70.120.120. 82-02-027 (Order DE-81-32), § 173-422-080, filed 12/31/81; 80-03-070 (Order DE 79-35), § 173-422-080, 

filed 2/28/80.] Repealed by 93-10-062 (Order 91-46), filed 5/3/93, effective 6/3/93. Statutory Authority: Chapter 

70.120 RCW. 

173-422-110 Date system requirements. [Statutory Authority: RCW 70.120.120. 82-02-027 (Order DE 81-32), § 173-422-110, filed

12/31/81; 80-03-070 (Order DE 79-35), § 173-422-110, filed 2/28/80.] Repealed by 93-10-062 (Order 91-46), filed 

5/3/93, effective 6/3/93. Statutory Authority: Chapter 70.120 RCW. 

173-422-140 Inspection forms and certificates. [Statutory Authority: Chapter 70.120 RCW. 93-10-062 (Order 91-46), § 173-422-140, 

filed 5/3/93, effective 6/3/93; 90-06-062, § 173-422-140, filed 3/6/90, effective 4/6/90. Statutory Authority: RCW 

70.120.120, 43.21A.080, 70.94.331 and 70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-140, filed 11/23/83, 

effective 1/2/84. Statutory Authority: RCW 70.120.120. 82-02-027 (Order DE 81-32), § 173-422-140, filed 12/31/81; 

80-03-070 (Order DE 79-35), § 173-422-140, filed 2/28/80.] Repealed by 94-05-039 (Order 93-10), filed 2/8/94, 

effective 3/11/94. Statutory Authority: Chapter 70.120 RCW. 

173-422-150 Inspection personnel requirements. [Statutory Authority: RCW 70.120.120. 80-03-070 (Order DE 79-35), § 173-422-

150, filed 2/28/80.] Repealed by 93-10-062 (Order 91-46), filed 5/3/93, effective 6/3/93. Statutory Authority: Chapter 

70.120 RCW. 

173-422-180 Air quality standards. [Statutory Authority: RCW 70.120.120. 80-03-070 (Order DE 79-35), § 173-422-180, filed 

2/28/80.] Repealed by 93-10-062 (Order 91-46), filed 5/3/93, effective 6/3/93. Statutory Authority: Chapter 70.120 

RCW. 

WAC 173-422-010 Purpose. This chapter implements the

Washington Clean Air Act, chapter 70.94 RCW, as supplemented by

the motor vehicle emission inspection provisions codified as

chapter 70.120 RCW.

Gasoline motor vehicles are the primary emitters of carbon

monoxide and emit significant quantities of hydrocarbons and
WAC (7/2/02 1:12 PM)[ 2 ]

oxides of nitrogen. Diesel motor vehicles are emitters

primarily of particulates, hydrocarbons, and oxides of nitrogen.

Emission controls required by the federal government are

designed to reduce motor vehicle related air pollution.

However, the effectiveness of these controls is substantially

reduced through deterioration, maladjustment and tampering.

Motor vehicle emission inspection serves to identify high

polluting vehicles and vehicles with tampered or missing

emission controls and to reduce their emissions, when such

reduction can be accomplished at reasonable cost. These rules

establish the emission standards, testing procedures, and

associated activities necessary to implement a program of air

pollution prevention and control resulting from motor vehicle

emission inspections.

[Statutory Authority: Chapter 70.120 RCW. 93-10-062 (Order 91-

46), § 173-422-010, filed 5/3/93, effective 6/3/93. Statutory

Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-010, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 80-03-070 (Order DE 79-35), § 173-422-010, filed

2/28/80.]

WAC 173-422-020 Definitions. Unless a different meaning

is clearly indicated by context, the following definitions will

apply:

(1) "Appropriate repair" means the diagnosis of the

cause(s) of an emission test failure and/or the repair of one or

more of these causes. An appropriate repair should reduce at

least one emission test reading or diagnose and/or repair an

emission problem identified by the on-board diagnostic (OBD)

system.

(2) "Certificate of acceptance" means an official form,

issued by someone authorized by the department, which certifies

that the following conditions have been met:

(a) The vehicle failed an emission inspection; and

(b) The vehicle failed a reinspection; and

(c) All primary emission control components installed by

the vehicle manufacturer, or its appropriate replacement, are

installed and operative; and

(d) The recipient has provided original receipts listing

and providing the cost of each appropriate repair performed by

an authorized emission specialist between the initial and last

inspection; and

(e) The total cost of the appropriate repairs must equal or

exceed:
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Pre-1981 vehicles $100

1981 and newer $150

(3) "Certificate of compliance" means an official form,

issued by someone authorized by the department, which certifies

that the recipient's vehicle on inspection complied with

applicable emission inspection standards.

(4) "Authorized emission specialist" means an individual

who has been issued a certificate of instruction by the

department as authorized in RCW 70.120.020 (2)(a) and has

maintained the certification by meeting requirements of WAC 173-

422-190(2).

(5) "Dealer" means a motor vehicle dealer, as defined in

chapter 46.70 RCW as amended, that is licensed pursuant to

chapter 46.70 RCW.

(6) "Department" means the department of ecology.

(7) "Emission contributing area" means a land area within

whose boundaries are registered motor vehicles that contribute

significantly to the violation of motor vehicle related air

quality standards in a noncompliance area.

(8) "Fleet" means a group of fifteen or more motor vehicles

owned or leased concurrently by one owner assigned a fleet

identifier code by the department of licensing.

(9) "Gross vehicle weight rating (GVWR)" means the

manufacturer stated gross vehicle weight rating.

(10) "Motor vehicle" means any self-propelled vehicle

required to be licensed pursuant to chapter 46.16 RCW.

(11) "Noncompliance area" means a land area within whose

boundaries any air quality standard for any air contaminant from

the emissions of motor vehicles will probably be exceeded.

(12) "PPM" means parts per million by volume.

(13) "Primary emission control components" means the

components of the vehicle installed by the manufacturer for the

purpose of reducing emissions or its replacement or modification

which is acceptable to the United States Environmental

Protection Agency. These components are, but are not limited

to, the catalytic converter or thermal reactor, the air

injection system components, the thermostatic air cleaner, the

exhaust gas recirculation system components, the evaporative

emission system components including the gas cap, the positive

crankcase ventilation system components and the electronic

control unit components that control the air/fuel mixture and/or

ignition timing including all related sensors.

The primary emission control components of a vehicle with a

different engine than the engine originally installed shall be

an Environmental Protection Agency certified engine/emission

control combination for that vehicle or its newer model.
WAC (7/2/02 1:12 PM)[ 4 ]

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-020, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-35), § 173-

422-020, filed 2/28/95, effective 3/31/95; 94-05-039 (Order 93-

10), § 173-422-020, filed 2/8/94, effective 3/11/94; 93-10-062

(Order 91-46), § 173-422-020, filed 5/3/93, effective 6/3/93;

90-06-062, § 173-422-020, filed 3/6/90, effective 4/6/90.

Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-020, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 80-03-070 (Order DE 79-35), § 173-422-020, filed

2/28/80.]

WAC 173-422-030 Vehicle emission inspection requirement.

All motor vehicles, not specifically exempted by WAC 173-422-

170, which are registered or reregistered within the boundaries

of an emission contributing area, as specified in WAC 173-422-

050, are subject to the vehicle emission inspection requirements

of this chapter. In addition, the department may require an

emission inspection of a motor vehicle, except military tactical

vehicles, operated for more than sixty days a year on a federal

installation located within an emission contributing area, or a

vehicle garaged at a location within an emission contributing

area, or a vehicle which has previously passed an emission

inspection but has been identified using on road testing as

likely to no longer comply with the inspection standards.

Neither the department of licensing, county auditors nor

subagents appointed under RCW 46.01.140 may change the

registered owner or may issue or renew a motor vehicle license

for any vehicle registered in an emission contributing area, as

that area is established under RCW 70.120.150, unless the

application for issuance or renewal is: (1) Accompanied by a

valid certificate of compliance issued pursuant to RCW

70.120.080 or 70.120.170 or a valid certificate of acceptance

issued pursuant to RCW 70.120.070; or (2) exempted from this

requirement pursuant to RCW 46.16.015(2). Certificates must

have a date of validation which is within twelve months of the

assigned license renewal date.

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-030, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 96-21-029 (Order 95-11), § 173-

422-030, filed 10/9/96, effective 11/9/96; 95-06-068 (Order 93-

35), § 173-422-030, filed 2/28/95, effective 3/31/95; 94-05-039

(Order 93-10), § 173-422-030, filed 2/8/94, effective 3/11/94;
WAC (7/2/02 1:12 PM)[ 5 ]

93-10-062 (Order 91-46), § 173-422-030, filed 5/3/93, effective

6/3/93. Statutory Authority: RCW 70.120.120, 43.21A.080,

70.94.331 and 70.94.141(1). 83-23-115 (Order DE 83-31), § 173-

422-030, filed 11/23/83, effective 1/2/84. Statutory Authority:

RCW 70.120.120. 80-03-070 (Order DE 79-35), § 173-422-030,

filed 2/28/80.]

WAC 173-422-031 Vehicle emission inspection schedules.

(1) Vehicles defined in RCW 46.16.015(2) or WAC 173-422-170 are

exempt from emission inspections. Vehicles five through twentyfive years old, other than state and local government vehicles,

shall be inspected every other year as described in the table

below. This inspection schedule does not apply to vehicles that

have already been issued a certificate of compliance or a

certificate of acceptance within twelve months of the assigned

license renewal date.

Year Model Year of Vehicles Needing Inspection

2002 1978, 1980, 1982, 1984, 1986, 1988, 1990, 

1992, 1994, 1997

2003 1979, 1981, 1983, 1985, 1987, 1989, 1991, 

1993, 1995, 1996, 1998

2004 1980, 1982, 1984, 1986, 1988, 1990, 1992, 

1994, 1997, 1999

2005 1981, 1983, 1985, 1987, 1989, 1991, 1993, 

1995, 1996, 1998, 2000

2006 1982, 1984, 1986, 1988, 1990, 1992, 1994, 

1997, 1999, 2001

2007 1983, 1985, 1987, 1989, 1991, 1993, 1995, 

1996, 1998, 2000, 2002

2008 1984, 1986, 1988, 1990, 1992, 1994, 1997, 

1999, 2001, 2003

2009 1985, 1987, 1989, 1991, 1993, 1995, 1996, 

1998, 2000, 2002, 2004

2010 1986, 1988, 1990, 1992, 1994, 1997, 1999, 

2001, 2003, 2005

2011 1987, 1989, 1991, 1993, 1995, 1996, 1998, 

2000, 2002, 2004, 2006

2012 1988, 1990, 1992, 1994, 1997, 1999, 2001, 

2003, 2005, 2007

(2) State and local government vehicles five through

twenty-five years old shall be inspected yearly as described in

the table below.

Year Model Year of Vehicles Needing Inspection

2002 1977 through 1997

2003 1978 through 1998

2004 1979 through 1999
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2005 1980 through 2000

2006 1981 through 2001

2007 1982 through 2002

2008 1983 through 2003

2009 1984 through 2004

2010 1985 through 2005

2011 1986 through 2006

2012 1987 through 2007

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-031, filed 6/3/02, effective 7/4/02; 00-22-120 (Order

00-15), § 173-422-031, filed 11/1/00, effective 12/2/00.]

WAC 173-422-035 Registration requirements. (1) Persons

residing in emission contributing areas as defined under WAC

173-422-050 shall register their motor vehicles within that

area.

(2) Any person who violates this section shall reregister

their motor vehicle within the emission contributing area,

obtain a certificate of compliance or acceptance within thirty

days, and is subject to a civil penalty not to exceed two

hundred fifty dollars for each violation.

(3) Any civil penalty imposed by the department hereunder

shall be appealable to the pollution control hearings board as

provided for in chapter 43.21B RCW.

[Statutory Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-

35), § 173-422-035, filed 2/28/95, effective 3/31/95; 93-10-062

(Order 91-46), § 173-422-035, filed 5/3/93, effective 6/3/93;

90-06-062, § 173-422-035, filed 3/6/90, effective 4/6/90.]

WAC 173-422-040 Noncompliance areas. The following areas

are designated noncompliance areas for the air contaminants

specified: Carbon monoxide

(1) The city of Seattle.

(2) The city of Bellevue.

(3) The city of Spokane.

(4) The city of Tacoma.

(5) The city of Vancouver.

(6) The city of Everett.
WAC (7/2/02 1:12 PM)[ 7 ]

[Statutory Authority: Chapter 70.120 RCW. 93-10-062 (Order 91-

46), § 173-422-040, filed 5/3/93, effective 6/3/93; 90-06-062, §

173-422-040, filed 3/6/90, effective 4/6/90. Statutory

Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-040, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 82-02-027 (Order DE 81-32), § 173-422-040, filed

12/31/81; 80-03-070 (Order DE 79-35), § 173-422-040, filed

2/28/80.]

WAC 173-422-050 Emission contributing areas. Emission

contributing areas within which the motor vehicle emission

inspection program applies are designated by the following

United States Postal Service ZIP codes as of September 1, 1994,

set forth below:

 (1) Puget Sound Region

98001 98036 98083

98002 98037 98092

98003 98038 98093

98004 98039 98101 thru 98199

98005 98040 inclusive except 98110

98006 98041 98201 thru 98208

98007 98042 98258

98008 98043 98270

98009 98046 98271

98011 98047 98275

98012 98052 98290

98015 98053 98291

98020 98054 98327

98021 98055 98332

98023 98056 98335

98025 98057 98338

98026 98058 98344

98027 98059 98352

98028 98062 98354
WAC (7/2/02 1:12 PM)[ 8 ]

98031 98063 98371 thru 98374

98032 98064 98387

98033 98071 98388

98034 98072 98390

98035 98073 98401 thru 98499 

 (2) Spokane Region

99001

99005

99014

99016

99019

99021

99025

99027

99037

99201 thru 99299 

 (3) Vancouver Region

98604 except north of N.E. 279th Street

98606

98607

98629 except east of N.E. 50th Avenue

98642

98660 thru 98668

98671 except Skamania County

98682-86

[Statutory Authority: Chapter 70.120 RCW. 96-21-029 (Order

95-11), § 173-422-050, filed 10/9/96, effective 11/9/96;

95-06-068 (Order 93-35), § 173-422-050, filed 2/28/95, effective

3/31/95; 94-05-039 (Order 93-10), § 173-422-050, filed 2/8/94,

effective 3/11/94; 93-10-062 (Order 91-46), § 173-422-050, filed

5/3/93, effective 6/3/93; 84-09-087 (Order DE 84-7), §

173-422-050, filed 4/18/84. Statutory Authority: RCW

70.120.120, 43.21A.080, 70.94.331 and 70.94.141(1). 83-23-115
WAC (7/2/02 1:12 PM)[ 9 ]

(Order DE 83-31), § 173-422-050, filed 11/23/83, effective

1/2/84. Statutory Authority: RCW 70.120.120. 82-02-027 (Order

DE 81-32), § 173-422-050, filed 12/31/81; 80-03-070 (Order DE

79-35), § 173-422-050, filed 2/28/80.]

WAC 173-422-060 Gasoline vehicle emission standards.

Gasoline motor vehicles subject to this chapter shall:

(1) When tested using the exhaust emission testing

procedures described in (II) Two Speed Idle Test of Appendix B

Test Procedures of Subpart S-Inspection/Maintenance Program

Requirements of Part 51 of Chapter 1, Title 40 of the Code of

Federal Regulations adopted November 1, 1992, meet the

applicable exhaust emission standards from the following table

during both the idle and higher speed mode.

Two Speed Idle Test Exhaust Emission Standards 

Model Year CO(%).* HC (ppm).*

80 and earlier 3.0 600

81 and newer (0-8500 

GVWR)

 1.2 220

81 and newer (Greater 

than 8500 GVWR)

 3.0 400

*Carbon monoxide (CO) and hydrocarbons (HC), measured as a percentage 

(%) or parts per million (ppm) of the exhaust volume. 

(2) When tested using the acceleration simulation mode

(ASM) procedure specified in WAC 173-422-070 meet the following

standards during that mode and the applicable standard from WAC

173-422-060(1) during the idle mode.

ASM Mode Exhaust Emission Standards 

Model Year Test 

Weight (lbs.)

CO(%).* HC(ppm)

1980 and earlier model year cars and trucks (0-8500 lbs. 

GVWR) 

1750 4.2 400

1875 4.0 380

2000 3.8 350

2125 3.6 340

2250 3.4 320

2375 3.2 300

2500 3.0 290
WAC (7/2/02 1:12 PM)[ 10 ]

2625 2.9 270

2750 2.8 260

2875 2.7 250

3000 2.6 240

3125 2.5 230

3250 2.4 220

3375 2.3 220

3500 2.2 210

3625 2.1 200

cars 3750 & greater 2.1 200

trucks 3750 & greater 2.5 300

1981 & later model year cars and trucks (0-8500 lbs. 

GVWR) 

1750 1.8 250

1875 1.7 240

2000 1.6 220

2125 1.5 210

2250 1.5 200

2375 1.4 190

2500 1.3 180

2625 1.3 180

2750 1.2 170

2875 1.2 160

3000 1.1 160

3125 1.1 150

3250 1.0 150

3375 1.0 150

3500 1.0 150

3625 1.0 150

cars 3750 & greater 1.0 150

trucks 3750 & greater 1.5 200

.*Carbon monoxide (CO) and hydrocarbons (HC), measured as a percentage 
WAC (7/2/02 1:12 PM)[ 11 ]

(%) or parts per million (ppm) of the exhaust volume. 

(3) The gasoline filler cap must not leak more than 60

cubic centimeters per minute at a pressure of 30 inches of

water.

(4) Standardized on-board diagnostic (OBD) systems (also

known as OBDII) were required by Environmental Protection Agency

starting with 1996 model gasoline vehicle cars and light trucks.

If a 1996 or newer model vehicle is equipped with an

Environmental Protection Agency certified on-board diagnostic

(OBD) system, the information stored in the on-board computer

must indicate that all emission-related functional checks have

been completed except for 1996 to 2000 model year vehicles that

can have up to two readiness monitors not set to ready, or 2001

or newer model year vehicles that have one readiness monitor not

set to ready, and no malfunctions detected that would command

the malfunction indicator light to be illuminated.

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-060, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 96-21-029 (Order 95-11), § 173-

422-060, filed 10/9/96, effective 11/9/96; 95-06-068 (Order 93-

35), § 173-422-060, filed 2/28/95, effective 3/31/95; 93-10-062

(Order 91-46), § 173-422-060, filed 5/3/93, effective 6/3/93;

90-06-062, § 173-422-060, filed 3/6/90, effective 4/6/90.

Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-060, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 82-02-027 (Order DE 81-32), § 173-422-060, filed

12/31/81; 80-03-070 (Order DE 79-35), § 173-422-060, filed

2/28/80.]

WAC 173-422-065 Diesel vehicle exhaust emission standards.

(1) Diesel motor vehicles subject to this chapter shall meet the

following opacity standards when using the snap-acceleration

test procedures specified in WAC 173-422-075.

 Model Year Opacity (%)

1991 and earlier 55

1992 and later 40

(2) When using the Acceleration Simulation Mode (ASM) test

procedures specified in WAC 173-422-070 adapted for the testing

of diesel cars or light trucks (0-8500 pounds gross vehicle

weight rating), these vehicles shall meet a 20% opacity

standard.
WAC (7/2/02 1:12 PM)[ 12 ]

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-065, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-35), § 173-

422-065, filed 2/28/95, effective 3/31/95; 93-10-062 (Order 91-

46), § 173-422-065, filed 5/3/93, effective 6/3/93.]

WAC 173-422-070 Gasoline vehicle exhaust emission testing

procedures. All persons certified by, or under contract to, the

department to conduct motor vehicle emission inspections shall

use the exhaust emission testing procedures described in (II)

Two Speed Idle Test of Appendix B-Test Procedures of Subpart SInspection/Maintenance Program Requirements of Part 51 of

chapter 1, Title 40 of the Code of Federal Regulations adopted

November 1, 1992, except that the department may require that

the following Acceleration Simulation Mode (ASM) test procedure

replace the 2500 rpm mode of the Two Speed Idle Test.

Equivalent procedures may be approved by the department.

Variations to the procedures specified may be established

by the department for all or certain vehicles. Vehicles, not

repaired as required by an emission recall for which owner

notification was attempted after January 1, 1995, shall not be

inspected until compliance with the recall is established.

Acceleration Simulation Mode (ASM)

1. Dynamometer Load: Set dynamometer horsepower 

load equal to [Vehicle Weight (lbs.) .+ 300]/300. An 

Environmental Protection Agency specified loading 

may also be used.

2. Vehicle Gear Selection: Vehicles with automatic 

transmissions use Drive (not Overdrive), vehicles 

with manual transmissions use second gear. Shift to 

the next higher gear if the engine speed exceeds 2500 

revolutions per minute.

3. Vehicle Speed: Set vehicle speed at 25 miles per 

hour (mph) 1.5 ± mph.

4. Pass or Fail Determinations: Once the vehicle has 

been operating at 25 mph for 15 seconds, begin 

measuring exhaust HC, CO, and CO2, each second. 

The reading for pass or fail determinations is the 

running average of five measurements. When a final 

pass or fail determination is made, this mode will be 

stopped and the final readings recorded.

5. Fast Pass: Once HC and CO readings are equal to or 

less than the HC and CO standards and are within 20 

ppm HC and 0.20% CO of each other.

6. Fast Fail: The vehicle will fail after 15 or more 

seconds of measurements when the HC reading 

exceeds 1800 ppm, or the CO reading exceeds 9.0 

percent.
WAC (7/2/02 1:12 PM)[ 13 ]

7. Full Term Pass/Fail: The vehicle will pass or fail the 

ASM mode after 90 seconds of measurements unless 

emission readings are declining at a rate that indicates 

that a failing vehicle will pass within the next 30 

seconds. Then the failing vehicle will receive up to 

an additional 30 seconds of measurements before the 

final pass/fail determination is made.

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-070, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 96-21-029 (Order 95-11), § 173-

422-070, filed 10/9/96, effective 11/9/96; 95-06-068 (Order 93-

35), § 173-422-070, filed 2/28/95, effective 3/31/95; 94-05-039

(Order 93-10), § 173-422-070, filed 2/8/94, effective 3/11/94;

93-10-062 (Order 91-46), § 173-422-070, filed 5/3/93, effective

6/3/93; 90-06-062, § 173-422-070, filed 3/6/90, effective

4/6/90. Statutory Authority: RCW 70.120.120, 43.21A.080,

70.94.331 and 70.94.141(1). 83-23-115 (Order DE 83-31), § 173-

422-070, filed 11/23/83, effective 1/2/84. Statutory Authority:

RCW 70.120.120. 82-02-027 (Order DE 81-32), § 173-422-070,

filed 12/31/81; 80-03-070 (Order DE 79-35), § 173-422-070, filed

2/28/80.]

NOTES:

Reviser's note: The brackets and enclosed material in the text of the above section

occurred in the copy filed by the agency.

WAC 173-422-075 Diesel vehicle inspection procedure.

Diesel vehicles shall be tested using the following snapacceleration test procedure unless the department requires the

Acceleration Simulation Mode (ASM) test procedure specified in

WAC 173-422-070 adapted for the testing of diesel cars or light

trucks (0-8500 pounds gross vehicle weight rating) be used in

lieu of the snap-acceleration test procedure.

Prior to beginning the test verify the engine is within its

normal operating temperature range, all vehicle accessories

including air conditioning are off, the parking brake and an

engine brake or retarder is off, the transmission is in neutral

(and clutch released if manual transmission).

(1) The vehicle shall receive at least three preliminary

snap-acceleration test cycles until consistent engine operation

is achieved. The snap-acceleration test cycle consists of

moving the accelerator pedal from normal idle as rapidly as

possible to the full power position, then fully releasing the

throttle so the engine returns to idle.

(2) Then perform additional snap-acceleration test cycles
WAC (7/2/02 1:12 PM)[ 14 ]

while measuring the smoke opacity with an opacity meter which

meets the requirements specified in WAC 173-422-095. The engine

must be allowed to remain at idle for at least ten seconds

between snap-acceleration test cycles. If a subsequent snapacceleration cycle is not begun within 45 seconds, the entire

sequence of snap-acceleration test cycles must be restarted.

The three preliminary snap-acceleration test cycles described in

(1) need not be repeated.

(3) Record peak opacity readings from each snapacceleration test cycle up to nine times if necessary to obtain

a peak opacity reading and two consecutive peak readings that

are equal to or less than the standard established in WAC 173-

422-065.

If a peak opacity reading and two consecutive peak readings

that are equal to or less than the standard established in WAC

173-422-065 are not obtained, the vehicle fails the test.

(4) Steps 2 and 3 are repeated for any additional exhaust

pipes.

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-075, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 94-05-039 (Order 93-10), § 173-

422-075, filed 2/8/94, effective 3/11/94; 93-10-062 (Order 91-

46), § 173-422-075, filed 5/3/93, effective 6/3/93.]

WAC 173-422-090 Exhaust gas analyzer specifications. Only

exhaust gas analyzers meeting the specifications contained in

(I) Steady-State Exhaust Analysis System of Appendix D-SteadyState Short Test Equipment of Subpart S-Inspection/Maintenance

Program Requirements of Part 51 of chapter 1, Title 40 of the

Code of Federal Regulations adopted November 1, 1992, at the

time of certification testing may be used for certification

testing, unless equivalent specifications have been approved by

the department.

[Statutory Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-

35), § 173-422-090, filed 2/28/95, effective 3/31/95; 93-10-062

(Order 91-46), § 173-422-090, filed 5/3/93, effective 6/3/93;

90-06-062, § 173-422-090, filed 3/6/90, effective 4/6/90.

Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-090, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 82-02-027 (Order DE 81-32), § 173-422-090, filed

12/31/81; 80-03-070 (Order DE 79-35), § 173-422-090, filed

2/28/80.]
WAC (7/2/02 1:12 PM)[ 15 ]

WAC 173-422-095 Exhaust opacity testing equipment. The

exhaust opacity measurement shall be conducted using an opacity

meter approved by the department.

The opacity meter shall:

(1) Automatically calibrates itself before each test.

(2) Provide for continuous measurement of exhaust opacity

unaffected by rain or wind.

[Statutory Authority: Chapter 70.120 RCW. 94-05-039 (Order 93-

10), § 173-422-095, filed 2/8/94, effective 3/11/94; 93-10-062

(Order 91-46), § 173-422-095, filed 5/3/93, effective 6/3/93.]

WAC 173-422-100 Testing equipment maintenance and

calibration. (1) Unless alternative procedures have been

approved or required by the department all equipment used in the

inspection shall be calibrated and maintained according to the

manufacturer's specifications and recommendations. Complete logs

as approved by the department shall be kept for maintenance,

repair, and calibration.

(2) The procedures for equipment maintenance and

calibration procedures described in (I) Steady-State Test

Equipment of Appendix A-Calibrations, Adjustments and Quality

Control of Subpart S-Inspection/Maintenance Program Requirements

of Part 51 of chapter 1, Title 40 of the Code of Federal

Regulations adopted November 1, 1992, shall be followed by all

testing facilities unless equivalent procedures have been

approved by the department.

[Statutory Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-

35), § 173-422-100, filed 2/28/95, effective 3/31/95; 93-10-062

(Order 91-46), § 173-422-100, filed 5/3/93, effective 6/3/93;

90-06-062, § 173-422-100, filed 3/6/90, effective 4/6/90.

Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-100, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 82-02-027 (Order DE 81-32), § 173-422-100, filed

12/31/81; 80-03-070 (Order DE 79-35), § 173-422-100, filed

2/28/80.]

WAC 173-422-120 Quality assurance. The department, or its

designee, may monitor the operation of each authorized emission

inspection/certification facility with unidentified or

unannounced and unscheduled inspections to check the calibration

and maintenance of the exhaust analyzers, test procedures, and

records.
WAC (7/2/02 1:12 PM)[ 16 ]

The department (or its designee) may immediately require

the suspension of vehicle inspections/certifications in all or

part by the inspection/certification facility if violations of

this chapter are found during an audit of the inspection

facility.

[Statutory Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-

35), § 173-422-120, filed 2/28/95, effective 3/31/95; 93-10-062

(Order 91-46), § 173-422-120, filed 5/3/93, effective 6/3/93.

Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-120, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 80-03-070 (Order DE 79-35), § 173-422-120, filed

2/28/80.]

WAC 173-422-130 Inspection fees. At an inspection

facility operated under contract to the state, the fee for the

first emission inspection on each vehicle applicable to a

vehicle license year shall be fifteen or less dollars. If the

vehicle fails, one reinspection will be provided free of charge

at any inspection station operated under contract to the state,

provided that the reinspection is applicable to the same vehicle

license year. Any additional reinspection of a failed vehicle

applicable to the same vehicle license year will require the

payment of fifteen or less dollars.

[Statutory Authority: RCW 70.120.080, 70.120.170 (4)(a),

46.16.015 (2)(h) and 70.120.120. 99-24-021 (Order 99-19), §

173-422-130, filed 11/22/99, effective 12/31/99. Statutory

Authority: Chapter 70.120 RCW. 94-05-039 (Order 93-10), § 173-

422-130, filed 2/8/94, effective 3/11/94. Statutory Authority:

RCW 70.120.170 (4)(a). 93-20-010 (Order 93-15), § 173-422-130,

filed 9/22/93, effective 10/23/93. Statutory Authority:

Chapter 70.120 RCW. 93-10-062 (Order 91-46), § 173-422-130,

filed 5/3/93, effective 6/3/93; 90-06-062, § 173-422-130, filed

3/6/90, effective 4/6/90. Statutory Authority: RCW

70.120.040(7). 87-02-051 (Order DE 86-32), § 173-422-130, filed

1/7/87, effective 4/1/87. Statutory Authority: RCW 70.120.120.

82-02-027 (Order DE 81-32), § 173-422-130, filed 12/31/81; 80-

03-070 (Order DE 79-35), § 173-422-130, filed 2/28/80.]

WAC 173-422-145 Fraudulent certificates of

compliance/acceptance. (1)(a) Obtaining or attempting to obtain

a certificate of compliance by (i) providing false information

or (ii) any fraudulent means; or
WAC (7/2/02 1:12 PM)[ 17 ]

(b) Obtaining or attempting to obtain a certificate of

acceptance (i) through the use of receipts or other

documentation containing false information, or (ii) any

fraudulent means shall be construed as a violation of these

rules implementing chapter 70.94 RCW as supplemented by chapter

70.120 RCW.

(2) Any person who commits such violation or who aids or

abets another in committing the same shall be subject to a civil

penalty not to exceed two hundred fifty dollars for each

violation.

(3) For the purposes of this section the term "expended"

refers to the net actual cost to the vehicle owner in the

purchase of repairs or parts derived after the amount of any

rebate, discount or cash-return has been subtracted.

(4) Any civil penalty imposed by the department hereunder

shall be appealable to the pollution control hearing board as

provided for in chapter 43.21B RCW.

[Statutory Authority: Chapter 70.120 RCW. 90-06-062, § 173-

422-145, filed 3/6/90, effective 4/6/90. Statutory Authority:

RCW 70.120.120, 43.21A.080, 70.94.331 and 70.94.141(1). 83-23-

115 (Order DE 83-31), § 173-422-145, filed 11/23/83, effective

1/2/84.]

WAC 173-422-160 Fleet and diesel owner vehicle testing

requirements. The department may authorize emission

inspections by fleet operators including government agencies and

the owners of diesel motor vehicles with a gross vehicle weight

rating in excess of 8500 pounds or by an automotive service or

testing facility engaged by the vehicle owner for such activity.

Authorizations to conduct emission tests and issue certificates

of compliance under this section are limited to authorized fleet

vehicles or diesel vehicles with a gross vehicle weight rating

in excess of 8500 pounds.

(1) All persons engaged in testing of gasoline fleet or

diesel vehicles must comply with all applicable provisions of

this chapter except as approved by the department.

(2) All persons conducting tests for the purpose of issuing

certificates for fleet or diesel vehicles shall be ecology

authorized emission specialists.

(3) Legibly completed forms will constitute certificates of

compliance for licensing purposes. Any person conducting

testing under this section shall forward to the department

within ten working days after the end of each month, a copy of

each certificate of compliance issued during that month. Copies

of each certificate of compliance shall be retained by the
WAC (7/2/02 1:12 PM)[ 18 ]

person issuing the certificate for at least two years from date

of issuance. Alternative arrangements for providing and or

storing this information using automated data storage devices

may be approved or required by the department.

Forms must be purchased from the department in advance of

issuance through payment of fifteen or less dollars to the

department for each certificate requested. Refunds or credit

may be given for unused certificates returned to the department.

Payment for fleet forms is waived for state and local

government fleets.

Test forms provided under this section are official

documents. Persons receiving the forms from the department are

accountable for each form provided.

Voided forms must be handled the same as certificates of

compliance. One copy shall be sent to the department within ten

days after the end of the month in which the form was voided and

one copy shall be retained by the person accountable for the

forms for at least two years after date of voiding. Refunds

will not be made for voided forms.

(4) All persons authorized to conduct fleet or government

vehicle inspections under this section shall be subject to

performance audits and compliance inspections by the department,

during normal business hours.

(5) Fleet vehicles may be inspected any time between their

scheduled license renewals.

(6) Certificates of acceptance may not be issued under this

section.

[Statutory Authority: RCW 70.120.080, 70.120.170 (4)(a),

46.16.015 (2)(h) and 70.120.120. 99-24-021 (Order 99-19), §

173-422-160, filed 11/22/99, effective 12/31/99. Statutory

Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-35), § 173-

422-160, filed 2/28/95, effective 3/31/95; 94-05-039 (Order 93-

10), § 173-422-160, filed 2/8/94, effective 3/11/94; 93-10-062

(Order 91-46), § 173-422-160, filed 5/3/93, effective 6/3/93;

90-06-062, § 173-422-160, filed 3/6/90, effective 4/6/90.

Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-160, filed

11/23/83, effective 1/2/84. Statutory Authority: RCW

70.120.120. 82-02-027 (Order DE 81-32), § 173-422-160, filed

12/31/81; 80-03-070 (Order DE 79-35), § 173-422-160, filed

2/28/80.]

WAC 173-422-170 Exemptions. The following motor vehicles

are exempt from the inspection requirement:

(1) Vehicles proportionally registered pursuant to chapter
WAC (7/2/02 1:12 PM)[ 19 ]

46.85 RCW.

(2) New motor vehicles whose equitable or legal title has

never been transferred to a person who in good faith purchases

the vehicle for purposes other than resale; this does not exempt

motor vehicles that are or have been leased.

(3) Motor vehicles that use propulsion units powered

exclusively by electricity.

(4) Motor-driven cycles as defined in chapter 46.04 RCW as

amended.

(5) Farm vehicles as defined in chapter 46.04 RCW as

amended.

(6) Vehicles not required to be licensed.

(7) Mopeds as defined in chapter 46.04 RCW as amended.

(8) Vehicles garaged and operated out of the emission

contributing area.

(9) Vehicles registered with the state but not for highway

use.

(10) Used vehicles at the time of sale by a Washington

licensed motor vehicle dealer.

(11) Motor vehicles fueled by propane, compressed natural

gas, or liquid petroleum gas and so registered by the department

of licensing.

(12) Motor vehicles whose manufacturer or engine

manufacturer provides information that the vehicle cannot meet

emission standards because of its design. In lieu of exempting

these vehicles, alternative standards and or inspection

procedures may be established.

(13) Motor vehicles whose registered ownership is being

transferred between parents, siblings, grandparents,

grandchildren, spouse or present co-owners and all transfers to

the legal owner or a public agency.

(14) Vehicles less than five years old.

(15) Vehicles more than twenty-five years old.

[Statutory Authority: RCW 70.120.120. 00-22-120 (Order 00-15),

§ 173-422-170, filed 11/1/00, effective 12/2/00. Statutory

Authority: RCW 70.120.080, 70.120.170 (4)(a), 46.16.015 (2)(h)

and 70.120.120. 99-24-021 (Order 99-19), § 173-422-170, filed

11/22/99, effective 12/31/99. Statutory Authority: Chapter

70.120 RCW. 96-23-030 (Order 96-11), § 173-422-170, filed

11/15/96, effective 12/16/96; 96-21-029 (Order 95-11), § 173-

422-170, filed 10/9/96, effective 11/9/96; 95-06-068 (Order 93-

35), § 173-422-170, filed 2/28/95, effective 3/31/95; 94-05-039

(Order 93-10), § 173-422-170, filed 2/8/94, effective 3/11/94;

93-10-062 (Order 91-46), § 173-422-170, filed 5/3/93, effective

6/3/93; 90-06-062, § 173-422-170, filed 3/6/90, effective

4/6/90. Statutory Authority: RCW 70.120.120, 43.21A.080,
WAC (7/2/02 1:12 PM)[ 20 ]

70.94.331 and 70.94.141(1). 83-23-115 (Order DE 83-31), § 173-

422-170, filed 11/23/83, effective 1/2/84. Statutory Authority:

RCW 70.120.120. 82-02-027 (Order DE 81-32), § 173-422-170,

filed 12/31/81; 80-03-070 (Order DE 79-35), § 173-422-170, filed

2/28/80.]

WAC 173-422-175 Fraudulent exemptions. (1) Obtaining or

attempting to obtain an exemption from emission inspection

requirements by false statements, or failure to comply with the

exemption procedures established to implement WAC 173-422-170,

shall be construed as a violation of these rules implementing

chapter 70.94 RCW as supplemented by chapter 70.120 RCW.

(2) Any person who commits such violation or who aids or

abets another in committing the same shall be subject to a civil

penalty not to exceed two hundred fifty dollars for each

violation.

(3) Any civil penalty imposed by the department hereunder

shall be appealable to the pollution control board as provided

for in chapter 43.21B RCW.

[Statutory Authority: RCW 70.120.120, 43.21A.080, 70.94.331 and

70.94.141(1). 83-23-115 (Order DE 83-31), § 173-422-175, filed

11/23/83, effective 1/2/84.]

WAC 173-422-190 Emission specialist authorization. (1) To

become an authorized emission specialist an individual shall:

(a) Pass a course of study, approved by the department; and

(b) Agree in writing to meet the requirements of subsection

(2) of this section and all requirements of law or regulation

regarding the serving of motor vehicle emission control systems

or the motor vehicle emission inspection program.

(2) To maintain certification, an authorized emission

specialist shall:

(a) Successfully complete a department-approved course on

emission repair within ninety days of being required to do so by

the department unless an extension has been granted in writing

by the department; and

(b) Sign, including the specialist identification number,

all receipts and other forms required by the department for

emission repairs or adjustments performed. These receipts must

be prenumbered, preprinted with the business's name and address

and clearly itemize all appropriate repairs performed by the

specialist; and

(c) Record on all receipts:

(i) The vehicle's emission readings after appropriate
WAC (7/2/02 1:12 PM)[ 21 ]

repairs or the diagnosis and/or repair of problem(s) identified

by the on-board diagnostic (OBD) during an emission inspection;

and

(ii) A vehicle description including the license number and

vehicle identification number (VIN); and

(iii) Any missing or inoperative primary emission control

components; and

(iv) Any further recommended appropriate repairs; and

(d) Not tamper with emission control systems, including

adjusting an engine outside of the manufacturer's specifications

(chapter 173-421 WAC); and

(e) Not obtain or attempt to obtain a certificate of

compliance, a certificate of acceptance (repair waiver) or an

exemption from the inspection requirements by providing false

information or by any fraudulent means (chapter 173-422 WAC);

and

(f) Not aid or abet any individual in committing a

violation of chapter 173-421 or 173-422 WAC.

(3) The certification of an authorized emission specialist

may be revoked for a first violation of chapter 173-421 WAC or

WAC 173-422-145, for a period of no more than one year, and may

be permanently revoked for a second violation of chapter 173-421

or 173-422 WAC.

The certification of an authorized emission specialist may

be temporarily revoked for violation of subsection (2) of this

section and may be permanently revoked for continued willful

violation of subsection (2) of this section.

An authorized emission specialist whose certification is

revoked permanently or temporarily may appeal to the pollution

control hearings board as provided for in RCW 43.21B.310.

(4) An authorized emission specialist whose certification

has been temporarily revoked may reapply for certification

twelve months after the date of revocation by applying to the

department and meeting all requirements of subsection (1) of

this section. An application for certification by a permanently

revoked authorized emission specialist will be denied.

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-190, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 96-21-029 (Order 95-11), § 173-

422-190, filed 10/9/96, effective 11/9/96; 95-06-068 (Order 93-

35), § 173-422-190, filed 2/28/95, effective 3/31/95; 90-06-062,

§ 173-422-190, filed 3/6/90, effective 4/6/90.]

WAC 173-422-195 Listing of authorized emission

specialists. (1) A list of authorized emission specialists will
WAC (7/2/02 1:12 PM)[ 22 ]

be available to the public. Specialists will be listed under

one employer's business name when the business is approved for

listing. The list will be updated by the department at least

once every six months.

(2) The employer's business name and address will be listed

by the department, when the employer agrees in writing to:

(a) Require the use of a properly maintained and correctly

calibrated exhaust analyzer and a scan tool capable of

communicating with the on-board diagnostic (OBD) systems

installed on all U.S. Environmental Protection Agency certified

1996 model year and newer gasoline vehicles to diagnosis

emission test failures and as a final check for emission repairs

or adjustments;

(b) Have all emission repairs or adjustments performed by

an authorized emission specialist;

(c) Require the authorized emission specialist to sign the

customer's receipt for emission repairs or adjustments, and to

record the vehicle's emission readings or which problem(s)

identified by the on-board diagnostic (OBD) system during an

emission inspection that have been diagnosed and/or repaired on

the receipt after the work is completed;

(d) Require that all employees not aid or abet any person

to tamper with emission control systems, including adjusting a

vehicle outside of the manufacturer's specifications (chapter

173-421 WAC); and

(e) Require that all employees not aid or abet any person

to obtain a fraudulent certificate of compliance, certificate of

acceptance or an exemption from the inspection requirement

(repair waiver) (chapter 173-422 WAC).

(f) Notify the department when an authorized emission

specialist begins or ends employment.

(3) An employer may be removed from the authorized emission

specialist list for a first violation of chapter 173-421 or 173-

422 WAC for a period of no more than one year and may be

permanently removed after a second violation of chapter 173-421

or 173-422 WAC.

An employer may be temporarily removed from the authorized

emission specialist list when failing to comply with the

requirements of subsection (2) of this section and may be

permanently revoked for continued and willful violation of

subsection (2) of this section.

(4) An employer who has been temporarily removed from the

authorized emission specialist list may reapply for listing

twelve months after the date of removal from the listing by

applying to the department and meeting all requirements of

subsection (2) of this section. An application for listing from

an employer permanently removed from the authorized emission
WAC (7/2/02 1:12 PM)[ 23 ]

specialist list will be denied.

(5) An employer who is removed from an authorized emission

specialist list or denied listing in an authorized emission

specialist list may appeal to the pollution control hearings

board as provided for in RCW 43.21B.310.

(6)(a) An employer approved for listing may display the

"state authorized emission specialist" sign available from the

department. Any employer advertising or providing of

information to the public based on the department's

certification of an authorized emission specialist must be

discontinued immediately when the employer no longer meets the

requirements.

(b) An employer violating (a) of this subsection shall be

subject to a civil penalty not to exceed two hundred fifty

dollars for each violation.

(c) A civil penalty imposed by the department may be

appealed to the pollution control hearings board as provided for

in RCW 43.21B.310.

[Statutory Authority: RCW 70.120.120. 02-12-072 (Order 02-04),

§ 173-422-195, filed 6/3/02, effective 7/4/02. Statutory

Authority: Chapter 70.120 RCW. 95-06-068 (Order 93-35), § 173-

422-195, filed 2/28/95, effective 3/31/95; 90-06-062, § 173-422-

195, filed 3/6/90, effective 4/6/90.]