OAR 437-002-0081
Oregon Ventilation Regulations


In addition to, and not in lieu of 29 CFR 1910.94, the following rules pertaining to ventilation apply in Oregon:

(1)

Definitions:

(a)

“Administrative Control” means the reduction of employee exposure to physical or chemical agents by control of the time of exposure to some period less than eight hours in length;

(b)

“Harmful” or “Hazardous” as applied to the health effects of dusts, fumes, vapors, mists, gases, or any environmental condition, means any mechanical, infectious, toxic, or other action which is likely to produce medically determined injury or disease of exposed workers;

(c)

“Health Hazard Control Measure” means the equipment or working arrangements designed to prevent the exposure of employees to harmful or hazardous situations. Such control measures may include, but are not limited to:

(A)

Ventilation systems;

(B)

Energy absorption system;

(C)

Personal protective equipment;

(D)

Air contaminant monitoring; and

(E)

Human biological monitoring.

(d)

“Local Exhaust System” means a system of hoods, booths, or enclosures designed to remove contaminants at points of generation or release into the atmosphere connected by means of piping to airflow or suction producing equipment;

(e)

“Occupational Health Hazard” means those materials, processes, and atmospheric contaminants or energy concentrations which during normal or abnormal working conditions are likely to result in injury or illness to the unprotected employee;

(f)

“Ventilation, Dilution” means ventilation provided to dilute the concentration of atmospheric contaminants in the atmosphere in all or part of the place of employment;

(g)

“Ventilation, General” means the provision of fresh air at the place of employment;

(h)

“Ventilation, Local Exhaust” means that the type of ventilation in which suction is applied at the point of generation or release of atmospheric contaminants;

(i)

“Ventilation, Natural” means ventilation designed to depend wholly upon relative air density, and includes the use of openable doors, windows, and other building apertures.

(2)

Recirculation. No air from any local exhaust system shall be recirculated, unless:

(a)

The inert dust contained therein has a Permissible Exposure Limit (PEL) equal to or greater than ten milligrams per cubic meter as listed in Tables Z-1, Z-2, or Z-3 in OAR chapter 437, division 2, subdivision Z, 1910, OAR 437-002-0382 (Oregon Rules for Air Contaminants), Oregon Rules for Air Contaminants. The inert dust concentration in such recirculated air shall not exceed five milligrams per cubic meter; or

(b)

The contaminant contained therein has a Permissible Exposure Limit (PEL) equal to or greater than 100 parts per million as listed in Tables Z-1, Z-2, or Z-3 or OAR chapter 437, division 2, subdivision Z, OAR 437-002-0382 (Oregon Rules for Air Contaminants), Oregon Rules for Air Contaminants. The contaminant concentration in such recirculated air shall not exceed 25 percent of its PEL; or

(c)

The concentrations of contaminants in recirculated air do not exceed 25 percent of unity as calculated by the formula given in Division 2, Subdivision Z, OAR 437-002-0382 (Oregon Rules for Air Contaminants)(4)(b), Oregon Rules for Air Contaminants.

(3)

Make-Up Air. Outside air equal in amount to the air removed by local exhaust systems shall be provided to replace air removed by an exhaust ventilation system.

(4)

Air Contamination from Exhaust System. The discharge from any exhaust system shall be such that no air contamination therefrom will enter any window, door, or other opening of any work area in quantities sufficient to create a harmful or hazardous work atmosphere.

(5)

Use of Salamanders and Fuel-Burning Heating Devices. Salamanders and other fuel-burning heating devices shall not be used in enclosed or inadequately ventilated spaces in which workers are employed unless such heating device is provided with a proper pipe, chimney, or enclosure to carry hazardous gases to the outside atmosphere.

(6)

Local Exhaust Ventilation. The capacity of a local exhaust system shall be calculated on the basis of all hoods, booths, and enclosures connected to the system being open, except where the system is so interlocked that only a portion of it can be operated at a given time, in which case the capacity shall be calculated on the basis that all the hoods in the group requiring the greatest volume rate of exhaust are open.

(7)

Exhausting More Than One Substance. Two or more operations involving more than one substance shall not be connected to the same exhaust system when a combination of the substances removed may constitute a fire hazard, or otherwise dangerous mixture.

(8)

Exhausting Materials with Flammable Properties. Those processes or operations which require local exhaust ventilation and generate materials with flammable properties shall be protected from sources of ignition.

(9)

Removal of Collected Materials. Collected materials shall be removed when necessary so as to maintain effective operation of the local exhaust system at all times.

(10)

Disposal of Collected Materials. Collected materials shall be disposed of in a manner which will not result in a hazard.

(11)

Requirements for Reduction of Air Contaminant Concentrations. A local exhaust system shall be in operation until all contaminants are reduced to concentrations at or below the Threshold Limit Values when any person is at risk.
NOTE: 1910.94(a)(6) was NOT adopted by OR-OSHA. In Oregon, OAR 437-002-0081 (Oregon Ventilation Regulations)(12) (which references a more current ANSI standard) applies.)

(12)

Air supply and air compressors. The air for abrasive-blasting respirators shall be free of harmful quantities of dusts, mists, or noxious gases, and shall meet the requirements for air purity set forth in ANSI Z9.2-1979, Fundamentals Governing the Design and Operation of Local Exhaust Systems. The air from the regular compressed air line of the plant may be used for the abrasive-blasting respirator if:

(a)

A trap and carbon filter are installed and regularly maintained to remove oil, water, scale, and odor;

(b)

A pressure reducing diaphragm or valve is installed to reduce the pressure down to requirements of the particular type of abrasive-blasting respirator; and

(c)

An automatic control is provided to either sound an alarm or shut down the compressor in case of overheating.
NOTE: Oregon did not adopt 1910.94(a)(6), which references an outdated ANSI standard. Instead, the following Oregon-initiated rule applies. This rule is identical, except that the current ANSI standard is referenced.

(13)

Blasting Nozzles. In addition to and not in lieu of the provisions of 1910.94(a)(7), blasting nozzles shall be equipped with a deadman switch or other effective means to prevent hose and nozzle from whipping. A support shall be provided on which the nozzle may be mounted when not in use.
[Publications: Publications referenced are available from the agency.]

Source: Rule 437-002-0081 — Oregon Ventilation Regulations, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=437-002-0081.

437–002–0005
Adoption by Reference
437–002–0006
General Oregon Definitions
437–002–0007
Testing and Certification
437–002–0010
Adoption by Reference
437–002–0015
Adoption by Reference
437–002–0020
Adoption by Reference
437–002–0022
Additional Oregon General Requirements
437–002–0026
Portable Ladders
437–002–0032
Ramps and Runways
437–002–0033
Piers and Wharves
437–002–0040
Adoption by Reference
437–002–0041
Exits and Exit Routes
437–002–0042
Emergency Action Plan
437–002–0043
Fire Prevention Plan
437–002–0047
Working Near Overhead High Voltage Lines and Equipment
437–002–0060
Adoption by Reference
437–002–0080
Adoption by Reference
437–002–0081
Oregon Ventilation Regulations
437–002–0095
Audiometric Testing in Oregon
437–002–0098
Additional Applicability
437–002–0100
Adoption by Reference
437–002–0101
Oregon Start-Up Dates
437–002–0107
Spray Finishing
437–002–0109
Explosives and Blasting Agents
437–002–0118
Oregon Rules for Reinforced Plastics Manufacturing
437–002–0119
Oregon Effective Dates
437–002–0120
Adoption by Reference
437–002–0122
Dipping and Coating
437–002–0134
Personal Protective Equipment
437–002–0139
Working Underway on Water.
437–002–0140
Adoption by Reference
437–002–0141
Additional Oregon Sanitation Requirements
437–002–0142
Labor Camps
437–002–0144
Additional Oregon Rules for General Environmental Controls
437–002–0145
Additional Oregon Rules for Accident Prevention and Tags
437–002–0146
Confined Spaces
437–002–0154
Individual Locks
437–002–0161
Medical Services and First Aid
437–002–0170
Worker Protection Standard
437–002–0180
Adoption by Reference
437–002–0182
Oregon Rules for Fire Fighters
437–002–0187
Portable Fire Extinguishers
437–002–0200
Adoption by Reference
437–002–0210
Additional Oregon Rules for Compressed Air and Compressed Gas Equipment
437–002–0220
Adoption by Reference
437–002–0221
Additional Oregon Rules for Handling Materials
437–002–0223
Oregon Rules for Commercial and Industrial Vehicles
437–002–0227
Additional Oregon Rules for Powered Industrial Trucks
437–002–0228
Oregon General Requirements for Cranes
437–002–0229
Additional Oregon Rules for Overhead and Gantry Cranes
437–002–0230
Additional Oregon Rule for Crawler, Locomotive and Truck Cranes
437–002–0232
Additional Oregon Rule for Derricks
437–002–0233
Oregon Rules for Hammerhead Cranes
437–002–0235
Additional Oregon Rule for Slings
437–002–0240
Adoption by Reference
437–002–0242
Oregon Rules for Machinery and Machine Guarding
437–002–0256
Stationary Compactors, Self-Contained Compactors, and Balers
437–002–0260
Adoption by Reference
437–002–0262
Additional Definitions in Oregon
437–002–0264
Additional General Requirements for Hand Tools
437–002–0266
Additional Oregon Rules for Guarding Portable Powered Tools
437–002–0268
Oregon Rules for Hand-Powered Equipment
437–002–0280
Adoption by Reference
437–002–0282
Job Planning and Layout
437–002–0283
Eye Protection and Protective Clothing
437–002–0284
Specifications for Protectors
437–002–0285
Special Precautions
437–002–0286
Preservative Coatings
437–002–0287
Toxic Preservative Coatings
437–002–0288
Health Protection and Ventilation — General
437–002–0297
Welding or Cutting Containers
437–002–0298
Self-Contained Units
437–002–0300
Adoption by Reference
437–002–0301
Scope and Application
437–002–0302
Definitions
437–002–0303
Training and Work Planning
437–002–0304
First Aid Requirements
437–002–0305
Traffic Control
437–002–0306
Electrical Hazards
437–002–0307
Personal Protective Equipment
437–002–0308
Portable Power Tools
437–002–0309
Hand Tools
437–002–0310
Work Procedures
437–002–0311
Mobile Equipment
437–002–0312
Oregon Rules for Pulp, Paper and Paperboard Mills
437–002–0313
Additional Oregon Rules for Sawmills
437–002–0314
Veneer and Plywood Machinery
437–002–0315
Shake and Shingle Machinery
437–002–0316
Oregon Rules for Telecommunications
437–002–0320
Adoption by Reference.
437–002–0340
Adoption by Reference
437–002–0342
Additional Oregon Definition
437–002–0345
Inland Emergency Aid
437–002–0355
Air Supply Systems (Compressed Gases and Air)
437–002–0360
Adoption by Reference
437–002–0363
Oregon Amendment
437–002–0364
Oregon Rules for MOCA (4,4’-Methylene Bis (2-chloroaniline))
437–002–0368
Deterioration
437–002–0371
Scope and Application
437–002–0373
Oregon Rules for Thiram
437–002–0377
Additional Oregon Rules for Hazard Communication
437–002–0378
Oregon Rules for Pipe Labelling
437–002–0382
Oregon Rules for Air Contaminants
437–002–0390
Oregon Effective Dates
437–002–0391
Additional Oregon Rules for Carcinogens in Laboratories
437–002–1001
Asbestos Respiratory Protection Program
437–002–1017
Vinyl Chloride Respiratory Protection Program
437–002–1018
Inorganic Arsenic Respiratory Protection Program
437–002–1025
Lead Respiratory Protection Program
437–002–1027
Cadmium Respiratory Protection Program
437–002–1028
Benzene Respiratory Protection Program
437–002–1029
Coke Oven Emissions Respiratory Protection Program
437–002–1030
Additional Oregon Rules for Bloodborne Pathogens
437–002–1035
Oregon Rule for Sharps Injury Log
437–002–1043
Cotton Dust Respiratory Protection Program
437–002–1044
1,2-Dibromo-3-Chloropropane Respiratory Protection Program
437–002–1045
Acrylonitrile Respiratory Protection Program
437–002–1047
Ethylene Oxide Respiratory Protection Program
437–002–1048
Formaldehyde Respiratory Protection Program
437–002–1050
Methylenedianiline Respiratory Protection Program
437–002–1051
1,3-Butadiene Respiratory Protection Program
437–002–1052
Methylene Chloride Respiratory Protection Program
437–002–1053
Scope and Application
437–002–1054
Definitions
437–002–1055
Permissible Exposure Limit (PEL)
437–002–1056
Exposure Assessment
437–002–1057
Specified exposure control methods
437–002–1058
Regulated and Restricted Access Areas
437–002–1059
Methods of Compliance
437–002–1060
Respiratory Protection
437–002–1061
Housekeeping
437–002–1062
Medical Surveillance
437–002–1063
Communication of Respirable Crystalline Silica Hazards to Employees
437–002–1064
Recordkeeping
437–002–1065
Dates
437–002–1139
Working Over or In Water
437–002–2021
Additional Oregon Definitions
437–002–2022
Additional Oregon Rules for Powered Platforms
437–002–2024
Scope and Application
437–002–2025
Definitions
437–002–2026
Permissible Exposure Limit (PEL)
437–002–2027
Rope Descent & Rope Access Systems
437–002–2028
Regulated and Restricted Access Areas
437–002–2029
Methods of Compliance
437–002–2030
Respiratory Protection
437–002–2031
Delayed Effective Dates for Walking-Working Surfaces
437–002–2032
Hygiene Areas and Practices
437–002–2033
Housekeeping
437–002–2034
Medical Surveillance
437–002–2035
Medical Removal
437–002–2036
Communication of Beryllium Hazards to Employees
437–002–2037
Recordkeeping
437–002–2038
Dates
437–002–2040
Exposure Assessment
437–002–2045
Personal Protective Clothing and Equipment
437–002–2101
Compressed Gases (General Requirements)
437–002–2102
Acetylene
437–002–2224
Vehicle Drivers and Riders
437–002–2225
Vehicles for Highway and Road Operation Characteristics and Maintenance
437–002–2226
Vehicles for Use on Property Other Than Public Roads and Highways Operation, Characteristics and Maintenance
437–002–2253
Oxygen-fuel Gas Welding and Cutting
437–002–2300
General
437–002–2301
Medical Services and First Aid
437–002–2302
Job Briefing
437–002–2303
Hazardous Energy Control Procedures
437–002–2304
Enclosed Spaces
437–002–2305
Excavations
437–002–2306
Personal Protective Equipment
437–002–2307
Portable Ladders and Platforms
437–002–2308
Hand and Portable Power Equipment
437–002–2309
Live-line Tools
437–002–2310
Materials Handling and Storage
437–002–2311
Working On or Near Exposed Energized Parts
437–002–2312
Deenergizing Lines and Equipment for Employee Protection
437–002–2313
Grounding for the Protection of Employees
437–002–2314
Testing and Test Facilities
437–002–2315
Mechanical Equipment
437–002–2316
Overhead Lines
437–002–2317
Line-clearance Tree Trimming
437–002–2318
Communication Facilities
437–002–2319
Underground Electrical Installations
437–002–2320
Substations
437–002–2321
Power Generation Installations
437–002–2322
Special Conditions
437–002–2323
Helicopters
437–002–2324
Definitions
Last Updated

Jun. 8, 2021

Rule 437-002-0081’s source at or​.us