Chapter 296-307 Safety standards for agriculture.

All pumps and accessory equipment must be suitable for LP-gas service, and designed for at least the maximum pressure to which they may be subjected. Accessories must have a minimum rated working pressure of 250 psig. Positive displacement pumps must have suitable pressure actuat…

(1) Meters, vapor separators, valves, and fittings in the dispenser must be suitable for LP-gas service and must be designed for a minimum working pressure of 250 psig.(2) Provisions must be made for venting LP-gas from a dispensing device to a safe location.(3) Pumps used to tra…

Smoking is prohibited on the driveway of service stations in the dispensing areas or transport truck unloading areas. Conspicuous signs prohibiting smoking must be posted within sight of the customer being served. Letters on such signs must be at least 4 inches high. The motors o…

Each service station must have at least one approved portable fire extinguisher with at least an 8-B, C, rating.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-44025, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified …

IMPORTANT:Dip tank. A container holding a liquid other than plain water that is used for dipping or coating. An object may be completely or partially immersed (in a dip tank) or it may be suspended in a vapor coming from the tank.Exemption:Dip tanks that use a molten material (mo…

Summary.Employer responsibility:Safeguard employees working with dip tanks.The employer must meet the requirements…in this section:CONSTRUCTION Construct safe dip tanks.WAC 296-307-45005VENTILATION Provide proper ventilation for the vapor area.WAC 296-307-45010The employer must t…

The employer must make sure dip tanks, including any drain boards, are strong enough to support the expected load.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-45005, filed 10/20/20, effective 11/20/20; WSR 03-10-068, § 296-307…

(1) The employer must make sure mechanical ventilation meets the requirements of one or more of the following standards:(a) NFPA 34-1995, Standard for Dipping and Coating Processes Using Flammable or Combustible Liquids;(b) ACGIH's "Industrial Ventilation: A Manual of Recommended…

(1) The employer must only recirculate air that contains no substance at a concentration that could pose a health or safety hazard to employees;(2) The employer must make sure any exhaust system that recirculates air into the workplace:(a) Passes the air through a device that rem…

The employer must make sure each room with an exhaust hood has a source of outside air that:(1) Enters the room in a way that will not interfere with the function of the hood;(2) Replaces at least ninety percent of the air taken in through the hood.[Statutory Authority: RCW 49.17…

(1) The employer must inspect or test the dip tanks and associated equipment periodically, including:(a) Covers;(b) Overflow pipes;(c) Bottom drains and valves;(d) Electrical wiring, equipment, and grounding connections;(e) Ventilating systems;(f) Fire extinguishing equipment.(2)…

The employer must make sure employees know the appropriate first-aid procedures for the hazards of dipping and coating operations.Notes:1. First-aid procedures are contained in the material safety data sheet (MSDS) for the chemicals used in the dip tank. 2. First-aid supplies app…

(1) The employer must drain the contents of the tank and open any cleanout doors.(2) The employer must ventilate the tank to clear any accumulated hazardous vapors.Reference:There may be requirements that apply before an employee enters a dip tank. See Confined spaces, WAC 296-30…

The employer must make sure the dip tank and the area around it are thoroughly cleaned of solvents and vapors before performing work involving:(1) Welding;(2) Burning;OR(3) Open flames.Reference:There are additional requirements for this type of work. See Welding, cutting and bra…

(1) The employer must make sure washing facilities, including hot water, are available for every ten employees that work with dip tank liquids.(2) The employer must satisfy medical requirements:(a) Make sure an employee with any small skin abrasion, cut, rash, or open sore receiv…

Summary.IMPORTANT:This section applies to:1. Flammable and combustible liquids (flashpoint below 200°F).2. Liquids that have a flashpoint of 200°F (93.3°C) or higher if:a. Heat the liquid;b. Dip a heated object in the tank.Employer responsibility:Safeguard employees working with …

(1) The employer must make sure the dip tank, drain boards (if provided), and supports are made of noncombustible material.(2) The employer must make sure piping connections on drains and overflow pipes allow easy access to the inside of the pipe for inspection and cleaning.[Stat…

(1) The employer must provide an overflow pipe on dip tanks that:(a) Hold more than one hundred fifty gallons of liquid;OR(b) Have more than ten square feet of liquid surface area.(2) The employer must make sure the overflow pipe is:(a) Properly trapped;(b) Able to prevent the di…

Exemption:A bottom drain is not required if: 1. The viscosity of the liquid makes it impractical to empty the tank by gravity or pumping; OR 2. The dip tank has an automatic closing cover that meets the requirements of WAC 296-307-45530.(1) The employer must provide a bottom drai…

The employer must provide a manual fire extinguisher near the tank that is suitable for putting out flammable and combustible liquid fires.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-45520, filed 10/20/20, effective 11/20/20;…

(1) The employer must provide at least one automatic fire extinguishing system or an automatic dip tank cover if the tank:(a) Holds one hundred fifty gallons or more of liquid;OR(b) Has four square feet or more of liquid surface area.(2) The employer must make sure automatic fire…

The employer must make sure any portable container used to add liquid to the tank is:(1) Electrically bonded to the dip tank;(2) Positively grounded.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-45535, filed 10/20/20, effective…

(1) The employer must make sure the vapor areas and adjacent areas do not have any:(a) Open flames;(b) Spark producing devices;(c) Heated surfaces hot enough to ignite vapors.(2) The employer must use explosion-proof wiring and equipment in the vapor area.Reference:Electrical wir…

The employer must make sure all electrical wiring and equipment in the vapor area is approved for areas that have:(1) Deposits of easily ignited residue;(2) Explosive vapor.Exemption:This does not apply to wiring that is: 1. In rigid conduit, threaded boxes or fittings; 2. Has no…

(1) The employer must make sure the area surrounding dip tanks is:(a) Completely free of combustible debris;(b) As free of combustible stock as possible.(2) The employer must provide approved metal waste cans that are:(a) Used for immediate disposal of rags and other material con…

The employer must keep the temperature of the liquid in the dip tank:(1) Below the liquid's boiling point;(2) At least 100°F below the liquid's autoignition temperature.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-45555, filed…

The employer must make sure the heating system used in a drying operation that could cause ignition:(1) Has adequate mechanical ventilation that operates before and during the drying operation;(2) Shuts down automatically if a ventilating fan fails to maintain adequate ventilatio…

The employer must make sure the conveyor system shuts down automatically if:(1) The ventilation system fails to maintain adequate ventilation;OR(2) There is a fire.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-45565, filed 10/2…

Employer responsibility:Safeguard employees working with dip tanks used for specific processes.The employer must meet the requirements…in this section:HARDENING OR TEMPERING Meet specific requirements if using a hardening or tempering tank.WAC 296-307-46005VAPOR DEGREASING Additi…

(1) The employer must provide an automatic fire extinguishing system or an automatic dip tank cover for any hardening and tempering tank that uses flammable or combustible liquids and:(a) Holds five hundred gallons (1893 L) or more of liquid;OR(b) Has twenty-five square feet (2.3…

(1) The employer must make sure, if the tank has a condenser or a vapor-level thermostat, that it keeps the vapor level at least:(a) Thirty-six inches (91 cm) below the top of the tank if the width of the tank is seventy-two inches or more;OR(b) One-half the tank width below the …

The employer must control the spray to the greatest extent feasible by:(1) Enclosing the spraying operation as completely as possible;(2) Using mechanical ventilation to provide enough inward air velocity to prevent the spray from leaving the vapor area.Note:Mechanical baffles ma…

ACGIH. American Conference of Governmental Industrial Hygienists.Adjacent area. Any area within twenty feet (6.1 m) of a vapor area that is not separated from the vapor area by tight partitions.ANSI. American National Standards Institute.Approved. Approved or listed by a national…

[WSR 97-09-013, recodified as § 296-307-475, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-475, filed 10/31/96, effective 12/1/96.]

Welder and welding operator. Any operator of electric or gas welding and cutting equipment.All other welding terms are defined according to American Welding Society, Terms and Definitions, A3.0-1969.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-…

[WSR 97-09-013, recodified as § 296-307-480, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-480, filed 10/31/96, effective 12/1/96.]

(1) Explosive mixtures of fuel gases and air or oxygen must be guarded against. No accessory that allows air or oxygen to mix with flammable gases prior to use must be allowed unless approved for that purpose.Exception:Air or oxygen may mix with flammable gases at the burner or i…

All portable cylinders used for storing and shipping compressed gases must be constructed and maintained according to DOT regulations.(1) Compressed gas cylinders must be legibly marked with either the chemical or the trade name of the gas. The marking must be a permanent stencil…

(1) Cylinders must be kept away from radiators and other sources of heat.(2) Indoors, cylinders must be stored in a well-protected, well-ventilated, dry area, at least twenty feet from highly combustible materials such as oil or excelsior. Cylinders should be stored in assigned p…

Cylinders stored indoors, except those in use or attached ready for use, must be limited to a total gas capacity of 2,000 cubic feet or 300 pounds of LP-gas.(1) Cylinders in excess of 2,000 cubic feet total gas capacity or 300 pounds of LP-gas, must be stored in a separate room o…

(1) Oxygen cylinders must not be stored near highly combustible material, especially oil and grease; or near reserve stocks of carbide and acetylene or other fuel-gas cylinders, or near any other substance likely to cause or accelerate fire; or in an acetylene generator compartme…

(1) The numbers and markings stamped into cylinders must not be tampered with.(2) Cylinders, cylinder valves, couplings, regulators, hose, and apparatus must be kept free from oily or greasy substances. Oxygen cylinders or apparatus must not be handled with oily hands or gloves. …

(1) Valve-protection caps must not be used for lifting cylinders from one vertical position to another. Bars must not be used under valves or valve-protection caps to pry cylinders loose when frozen to the ground or otherwise fixed; we recommend using warm (not boiling) water. Va…

(1) When transporting cylinders by a crane or derrick, a cradle, boat, or suitable platform must be used. Slings or electric magnets are prohibited for this purpose. Valve-protection caps, where cylinder is designed to accept a cap, must always be in place.(2) Unless cylinders ar…

(1) Cylinders must not be dropped or struck or permitted to strike each other violently.(2) Cylinders must be handled carefully. Cylinders must not be subjected to rough handling, knocks, or falls that are liable to damage the cylinder, valve or safety devices and cause leakage.(…

(1) Cylinder valves must be closed before moving cylinders.(2) Cylinder valves must be closed when work is finished.(3) Valves of empty cylinders must be closed.(4) A hammer or wrench must not be used to open cylinder valves. If valves cannot be opened by hand, the supplier must …

(1) Unless connected to a manifold, oxygen from a cylinder must first have an oxygen regulator attached to the cylinder valve.(2) Before connecting a regulator to a cylinder valve, the valve must be opened slightly and closed immediately. The valve must be opened while standing t…

(1) Manifolds must be approved either separately for each component part or as an assembled unit.(2) Fuel-gas cylinders connected to one manifold inside a building must be limited to a maximum total capacity of 300 pounds of LP-gas or 3,000 cubic feet of other fuel-gas. More than…

This section applies to cylinders with a DOT service pressure above 200 psig.(1) Manifolds must be approved either separately for each component or as an assembled unit.(2) Oxygen manifolds must not be located in an acetylene generator room. Oxygen manifolds must be separated fro…

This section applies to cylinders with a maximum DOT service pressure of 200 psig.(1) Manifolds must be of substantial construction suitable for use with oxygen at a pressure of 250 psig. They must have a minimum bursting pressure of 1,000 psig and must be protected by a safety-r…