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