Chapter 296-307 Safety standards for agriculture.

(1) The container-charging room must be located at least:(a) Ten feet from bulk storage containers.(b) Twenty-five feet from line of adjoining property that may be built on.(2) Tank truck filling station outlets must be located at least:(a) Twenty-five feet from line of adjoining…

(1) Each bulk plant must have at least one approved portable fire extinguisher with a minimum rating of 12-B, C.(2) In industrial installations involving containers of 150,000 gallons aggregate water capacity or more, the employer must provide an adequate supply of water at the c…

(1) Aboveground containers must be kept properly painted.(2) Vaporizers for internal combustion engines must meet the requirements of WAC 296-307-42515.(3) Gas regulating and mixing equipment for internal combustion engines must meet the requirements of WAC 296-307-42517.(4) Wher…

[WSR 97-09-013, recodified as § 296-307-425, 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-425, filed 10/31/96, effective 12/1/96.]

(1) WAC 296-307-425 applies to internal combustion engines, fuel containers, and pertinent equipment for the use of LP-gases as a motor fuel on easily movable, readily portable units including self-propelled vehicles. This section does not apply to containers for transportation o…

(1) Fuel may be used from the cargo tank of a truck while in transit, but not from cargo tanks on trailers or semitrailers. Fuel may be used from the cargo tanks to operate stationary engines if the wheels are securely blocked.(2) Passenger-carrying vehicles must not be fueled wh…

(1) Containers must meet the following requirements:Minimum design pressure of container lb. per sp. in. gaugeContainer typeFor gases with vapor press. Not to exceed lb. per sp. in. gauge at 100°F (37.8°C.)1949 and earlier editions of ASME Code (Par. U-68, U-69)1949 edition of AS…

(1) Containers must be located to minimize the possibility of damage to the container. Containers located in the rear of trucks and buses, when protected by substantial bumpers meet this requirement. Fuel containers on passenger-carrying vehicles must be installed as far from the…

(1) Container valves and accessories must have a rated working pressure of at least 250 psig, and must be suitable for LP-gas service.(2) The filling connection must be fitted with an approved double back-pressure check valve, or a positive shutoff in conjunction with an internal…

(1) Pipe from fuel container to first-stage regulator must be at least schedule 80 wrought iron or steel (black or galvanized), brass or copper; or seamless copper, brass, or steel tubing. Steel tubing must have a minimum wall thickness of 0.049 inch. Steel pipe or tubing must be…

(1) Spring-loaded internal safety-relief valves must be used on all motor fuel containers.(2) The discharge outlet from safety-relief valves must be located on the outside of enclosed spaces and as far as practical from possible sources of ignition, and vented upward within 45 de…

(1) Vaporizers, their parts, and other devices that may be subjected to container pressure must have a design pressure of at least 250 psig.(2) Each vaporizer must have a valve or suitable plug that will permit substantially complete draining of the vaporizer. It must be located …

(1) Approved automatic pressure reducing equipment must be installed securely between the fuel supply container and gas-air mixer to reduce the pressure of the fuel delivered to the gas-air mixer.(2) An approved automatic shut-off valve must be provided in the fuel system at some…

A single fuel container used on passenger carrying vehicles must have a maximum of 200 gallons water capacity. A single fuel container on other vehicles normally operating on the highway must have a maximum of 300 gallons water capacity except as provided in WAC 296-307-42503(1).…

Stationary engines and gas turbines installed in buildings, including portable engines used instead of or to supplement stationary engines, must comply with the Standard for the Institution and Use of Stationary Combustion Engines and Gas Turbines, NFPA 37-1970, and the appropria…

(1) Portable engines may be used in buildings only for emergency use, and according to WAC 296-307-42521.(2) Exhaust gases must be discharged outside the building or to an area where they will not constitute a hazard.(3) Provision must be made to supply sufficient air for combust…

(1) LP-gas-fueled industrial trucks may be used in buildings and structures.(2) No more than two LP-gas containers must be used on an industrial truck for motor fuel purposes.(3) LP-gas-fueled industrial trucks may be used in buildings frequented by the public, when occupied by t…

(1) LP-gas-fueled vehicles may be stored or serviced inside garages if there are no leaks in the fuel system and the fuel tanks are not filled beyond the maximum filling capacity allowed.(2) LP-gas-fueled vehicles being repaired in garages must have the container shut-off valve c…

[WSR 97-09-013, recodified as § 296-307-430, 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-430, filed 10/31/96, effective 12/1/96.]

WAC 296-307-430 applies to the storage of portable containers a maximum of 1,000 pounds water capacity, filled or partially filled, at user location but not connected for use, or in storage for resale by dealers or resellers. This section does not apply to containers stored at ch…

(1) Containers in storage must be located to minimize exposure to excessive temperature rise, physical damage, or tampering.(2) Containers stored inside must be located away from exits, stairways, or in areas normally used or intended for the safe exit of people.(3) Container val…

DOT containers with a maximum individual water capacity of 2-1/2 pounds, used with completely self-contained hand torches and similar applications, may be stored or displayed in a building frequented by the public. The display of such containers must be limited to a total of 24 u…

(1) The quantity of LP-gas stored must be a maximum of 300 pounds (approximately 2,550 cubic feet in vapor form), except when stored within special buildings or rooms.(2) Containers carried as a part of service equipment on highway mobile vehicles are not considered in the total …

(1) The quantity of LP-gas stored in special buildings or rooms must be a maximum of 10,000 pounds.(2) The walls, floors, and ceilings of container storage rooms that are within or adjacent to other parts of the building must be constructed of material having at least a two-hour …

(1) Storage outside of buildings, for containers awaiting use or resale, must be located according to the table below with respect to:(a) The nearest important building or group of buildings;(b) The line of adjoining property that may be built on;(c) Busy thoroughfares;(d) The li…

Storage locations other than supply depots separated and located apart from dealer, reseller, or user establishments must have at least one approved portable fire extinguisher having a minimum rating of 8-B, C.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.0…

[WSR 97-09-013, recodified as § 296-307-435, 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-435, filed 10/31/96, effective 12/1/96.]

(1) WAC 296-307-435 applies to:(a) LP-gas system installations on vehicles (self-propelled, trailers, or semitrailers) used for commercial or construction purposes;(b) All exchangeable container systems with container capacities greater than 105 pounds water capacity (approximate…

Containers must be constructed according to WAC 296-307-41011, and marked according to the applicable requirements of WAC 296-307-41015, and must also meet the following:(1) Containers designed for use as portable cylinders must be constructed according to DOT specifications.(2) …

A single fuel container used on passenger carrying vehicles must not exceed 200 gallons water capacity.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-43505, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified as § 296-…

(1) Containers must not be installed, transported, or stored (even temporarily) inside any vehicle covered by these standards except as provided by the DOT regulations.(2) Containers, control valves, and regulating equipment comprising a complete system must be suitably protected…

Container valves and accessories must be provided, protected and mounted as follows:(1) Systems using DOT cylinders according to WAC 296-307-41511.(2) All other systems according to WAC 296-307-42005 (2) through (8).(3) Portable, semiportable and permanently mounted containers mu…

(1) DOT containers must have safety-relief devices as required by DOT regulations.(2) A final stage regulator of an LP-gas system (excluding any appliance regulator) must have, on the low-pressure side, a relief valve that is set to start to discharge within the limits specified …

Commercial vehicles must use either vapor withdrawal or liquid withdrawal systems.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-43513, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified as § 296-307-43513, filed 4/7/…

(1) Housing or enclosures must be designed to provide proper ventilation.(2) Hoods, domes, or removable portions of cabinets must have means to keep them firmly in place during transit.(3) The assembly must hold the containers firmly in position and prevent their movement during …

(1) Regulators must be connected directly to the container valve outlet or mounted securely by means of support bracket and connected to the container valve or valves with a listed high pressure flexible connector.(2) Provision must be made between the regulator outlet and the ga…

(1) LP-gas appliances must be approved for use on commercial vehicles.(2) In vehicles not intended for human occupancy, where the gas-fired heating appliance is used to protect the cargo, such heater may be unvented, but provision must be made to dispose of the products of combus…

(1) DOT containers must be marked, maintained, and requalified for use according to DOT regulations.(2) Containers that have not been requalified according to DOT regulations must be removed from service. Requalified containers must be stamped with the date of requalification. Wh…

Containers must be charged according to DOT specifications.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-43523, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified as § 296-307-43523, filed 4/7/97, effective 4/7/97. S…

Mobile cook units must have at least one approved portable fire extinguisher having a minimum rating of 8-B, C.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-43525, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified a…

[WSR 97-09-013, recodified as § 296-307-440, 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-440, filed 10/31/96, effective 12/1/96.]

WAC 296-307-440 applies to storage containers, dispensing devices, and pertinent equipment in service stations where LP-gas is stored and dispensed into fuel tanks of motor vehicles. LP-gas service stations must meet all requirements of WAC 296-307-410 and the requirements of thi…

Storage containers must be designed and classified according to the following table:Minimum design pressure ofcontainer lb. per sp. in. gaugeContainer typeFor gases with vapor press. Not to exceed lb. per sp. in. gauge 100°F (37.8°C.)1949 and earlier editions of ASME Code (Par. U…

(1) A filling connection on the container must be fitted with one of the following:(a) A combination back-pressure check and excess flow valve.(b) One double or two single back-pressure valves.(c) A positive shut-off valve, in conjunction with either:(i) An internal back-pressure…

(1) All safety-relief devices must be installed as follows:(a) On the container and directly connected with the vapor space.(b) Safety-relief valves and discharge piping must be protected against physical damage. The outlet must have loose-fitting rain caps. There must be no retu…

Individual storage containers must be a maximum of 30,000 gallons water capacity.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-44009, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified as § 296-307-44009, filed 4/7/9…

(1) Each storage container used exclusively in service station operation must comply with the following table. This table outlines the minimum distances from a container to a building, group of buildings, or adjoining property lines that may be built on. Minimum distancesWatercap…

Valves, regulators, gauges, and other container fittings must be protected against tampering and physical damage.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-44013, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified…

(1) During unloading, the transport truck must not be parked on public thoroughfares and must be at least 5 feet from storage containers. The truck must be positioned so that shut-off valves are accessible.(2) The filling pipe inlet terminal must not be located within a building …

(1) Piping may be underground, aboveground, or a combination of both. It must be well supported and protected against physical damage and corrosion.(2) Piping laid beneath driveways must be installed to prevent physical damage by vehicles.(3) Piping must be wrought iron or steel …