Washington Administrative Code

(1) No material may be stored within pesticide secondary containment unless the material is compatible with all other material stored within the secondary containment. For the purposes of this section, compatible means that the materials, when mixed together, will not react in a …

Precipitation may not be allowed to accumulate in secondary containment to the point where it:(1) Reduces the capacity of the secondary containment below one hundred ten percent of the volume of the largest storage container within the area plus the displacement of all other stor…

Discharges within secondary containment shall be immediately recovered.[Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 00-23-074, § 16-229-090, filed 11/17/00, effective 12/18/00. Statutory Authority: RCW 15.54.800 and 15.58.040. WSR 93-22-093 (Order 5018), § 16-229-090, …

Permanent storage facility general requirements:(1) Storage containers and appurtenances shall be constructed, installed and maintained so as to prevent the discharge of liquid pesticide.(2) Storage containers and appurtenances shall be constructed of materials which are resistan…

No person shall store liquid bulk pesticide, pesticide spills or rinsates in an underground storage container or surface impoundment, such as a lined pond or pit. A watertight catch basin or sump used for the temporary collection of rinsate or runoff from transfer and loading are…

(1) Storage containers used at a permanent storage facility, or used for temporary field storage to hold liquid bulk pesticide or pesticide rinsate are considered abandoned if they have been out of service for more than six consecutive months because of a weakness or leak, or hav…

Storage containers shall be secured, if necessary, to prevent flotation or instability which might occur as a result of liquid accumulations within a secondary containment facility.[Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 00-23-074, § 16-229-130, filed 11/17/00, ef…

Storage containers may not be filled beyond the capacity for which they are designed, taking into account the density of the liquid being stored and thermal expansion during storage.[Statutory Authority: RCW 15.54.800 and 15.58.040. WSR 93-22-093 (Order 5018), § 16-229-140, filed…

(1) Every storage container shall be equipped with a liquid level gauging device by which the level of liquid in the storage container can be readily and safely determined.(2) A liquid level gauging device is not required if the level of liquid in a storage container can be relia…

Storage containers used for liquid bulk pesticide shall be equipped with a conservation vent which opens and closes within the designed pressure limits of the container.[Statutory Authority: RCW 15.54.800 and 15.58.040. WSR 93-22-093 (Order 5018), § 16-229-160, filed 11/2/93, eff…

All bulk pesticide storage containers and appurtenances shall be fenced or otherwise secured to provide reasonable protection against vandalism or unauthorized access. Valves on storage containers shall be closed and locked or otherwise secured when left unattended. Locks on end …

(1) All bulk pesticide storage containers shall be labeled in accordance with the Washington Pesticide Control Act (chapter 15.58 RCW) and the Federal Insecticide, Fungicide and Rodenticide Act. The registered product label shall be attached to the bulk storage container in a pro…

(1) Containers used for temporary field storage of liquid bulk pesticide shall comply with the following sections: WAC 16-229-100, 16-229-110, 16-229-120, 16-229-140, 16-229-150, 16-229-160, and 16-229-180.(2) All bulk pesticide storage containers and appurtenances used for field…

(1) All operational area activities shall take place on or within operational area containment: Provided, That during the unloading or loading of railcars, marine vessels, or manned trucks when product is unloaded from direct shipments from manufacturers, individual basins or por…

(1) During loading and unloading of liquid bulk pesticide at temporary field storage locations individual basins or portable storage containers shall be used to recover spillage and leakage from transfer connections and pumps.(2) Liquid bulk pesticide storage containers used for …

(1) Dry bulk pesticides shall be stored in storage containers designed and constructed to hold dry bulk pesticide and shall be compatible with the stored pesticide. Storage containers shall be constructed of materials which are resistant to corrosion, puncture or cracking and sha…

(1) When piping within secondary containment or an operational area is directly connected to a water source such as a well or public water system, an approved air gap or an approved reduced pressure principle backflow prevention assembly (RPBA) shall be installed to protect the w…

(1) Pesticide products, or rinsates spilled, or accumulated within a secondary or operational area facility, shall be immediately recovered. Any use of these materials shall be at labeled rates consistent with labeled end uses for the product(s). The materials may be stored for l…

(1) The operator of a pesticide bulk storage facility shall inspect and maintain storage containers, appurtenances, secondary containment and operational area containment to minimize the risk of a pesticide release. The inspection shall include a visual observation for any eviden…

The following records shall be maintained at permanent storage facilities or at the nearest local office from which the permanent storage facility is administered:(1) A record of construction materials and methods of construction to show compliance with WAC 16-229-025, 16-229-030…

(1) The operator of a permanent storage facility shall prepare a written spill response plan for the permanent storage facility. If all or portions of the information required by the spill response plan have been prepared for plans required by other government agencies, they need…

(1) The department may issue a permit exempting any person from a requirement under Part 2 of this chapter if compliance is not technically feasible in the judgment of the department and the department finds that alternative measures provide substantially similar protection. All …

(1) All operational area activities shall take place on or within operational area containment[:](2) Operational area containment shall be designed and constructed to contain pesticides, rinsates, washwater and other materials spilled or deposited during mixing, loading, unloadin…

(1) When piping within a permanent mixing/loading site is directly connected to a water source such as a well or public water system, an approved air gap or an approved reduced pressure principle backflow prevention assembly (RPBA) shall be installed to protect the water source. …

(1) Pesticide products or rinsates spilled or accumulated within an operational area containment facility shall be immediately recovered. Any use of these materials must be at labeled rates consistent with labeled end uses for the product(s). The materials may be stored for later…

(1) The operator of a permanent mixing/loading site shall inspect and maintain storage containers, appurtenances, and operational area facilities to minimize the risk of a pesticide release. The inspection shall include a visual observation for any evidence of leaks, spills, crac…

The following records shall be maintained at the permanent mixing/loading site or at the nearest local office from which the site is administered:(1) A record of construction materials and methods of construction to show compliance with WAC 16-229-400. These records shall be main…

(1) The operator of a permanent mixing/loading site shall prepare a written spill response plan for the facility. If all or portions of the information required by the spill response plan have been prepared for plans required by other government agencies they need not be prepared…

(1) The department may issue a permit exempting any person from a requirement under Part 3 of this chapter if compliance is not technically feasible in the judgment of the department and the department finds that alternative measures provide substantially similar protection. All …

Adoption of provisions under the American Society of Agricultural and Biological Engineers (ASABE) standards in this chapter is adoption of the provisions in the July 2018 version.[Statutory Authority: RCW 15.58.040 and 17.21.030. WSR 19-02-039, § 16-230-005, filed 12/26/18, effe…

If there is a conflict between the spray droplet spectrum size required in these rules and that which is required by the pesticide label, the applicator must use the largest droplet spectrum size required.[Statutory Authority: RCW 15.58.040 and 17.21.030. WSR 19-02-039, § 16-230-…

For the purposes of WAC 16-230-010 through 16-230-079, the following pesticides have additional statewide use restrictions when applied to blossoming alfalfa, clover and mint.COMMON CHEMICAL NAMEALSO KNOWN AS*acephateOrtheneazinphos-methylGuthioncarbarylSevincarbofuranFuradanchlo…

(1) The term "blossoming alfalfa, mint or clover" as used in WAC 16-230-010 through 16-230-082 shall apply when there are five or more blooms per square yard on the average in a given field: Provided, That following the first cutting the bloom count shall be taken only on the cur…

(1) The use or application of any formulation (except where the formulation is specified) of the following listed pesticides is prohibited on blossoming alfalfa and clover crops within seven days to blossoming: Provided, That methidathion (Supracide) when used in Kittitas County …

The use or application of malathion dust on blossoming mint is prohibited. The use or application of malathion (Fyfanon) liquid, oxydemeton-methyl (Metasystox-R), and methomyl (Lannate or Nudrin) liquid on blossoming mint is restricted to applications only within the period begin…

(1) Area 1 description. South central Walla Walla County - All lands lying within a line starting at the junction of the Washington-Oregon border and the Rainville Road; thence north along the Rainville Road to the Frog Hollow Road; thence west along the Frog Hollow Road to the M…

(1) Area 2 description. South central Walla Walla County - All lands lying within a line starting at the junction of the Rainville Road and the Washington-Oregon border; thence north to the Frog Hollow Road; thence east along the Frog Hollow Road to the Valley Chapel Road; thence…

The department may issue a permit upon receipt of a written request to apply use restricted pesticides listed in WAC 16-230-010 in variation of any restrictions listed in WAC 16-230-015, 16-230-030, and 16-230-075 through 16-230-078. The department will consider the hazard to pol…

(1) The insecticides* carbaryl (Sevin), diazinon, endosulfan (Thiodan), fenvalerate (Pydrin), malathion (Fyfanon), methomyl (Lannate or Nudrin), methyl parathion, parathion, and permethrin (Ambush or Pounce) are by this order declared to be use restricted insecticides. Such insec…

(1) Area 1 description - Yakima County. This area includes all of the irrigable lands encompassed by a line beginning at the southwest corner of Section 18, T8N, R21E; thence north nine miles more or less to the southeast corner of Section 36, T10N, R20E; thence fifteen miles wes…

(1) Area 3 description - Area within Area 2 in Grant County. This area includes all of the irrigable lands encompassed by a line beginning at the junction of West 645 wasteway and White Trail Road and proceeding east four miles more or less on White Trail Road to Winchester waste…

Upon receipt of a written request and justification for a variance, the director of the Washington state department of agriculture may issue a permit granting a variance from restrictions pertaining to pollen shedding corn.[Statutory Authority: RCW 15.58.040 and 17.21.030. WSR 19…

(1) Area under order: All counties located east of the crest of the Cascade Mountains.(2) Use restricted desiccants and defoliants: The following desiccants and defoliants are declared to be use restricted desiccants and defoliants in the area under order: Diquat; Paraquat; and E…

The following requirements apply to the entire area under order as listed in WAC 16-230-150:(1) Ground applications of use restricted desiccants and defoliants shall conform to the manufacturer's specified combination of nozzle type/size and pressure in pounds per square inch (ps…

The following requirements apply to the entire area under order as listed in WAC 16-230-150:(1) Boom length restrictions:(a) Fixed wing: The working boom length shall not exceed 3/4 of the distance from the center of aircraft to wing tip on each side of aircraft.(b) Helicopters: …

The following requirements apply to the entire area under order as listed in WAC 16-230-150:(1) Weather conditions: Use restricted desiccants and defoliants shall not be applied when there is a temperature inversion, or if wind or weather conditions are such that damage could res…

The following restrictions shall apply in Walla Walla County:(1) Area 1 description - Town of Walla Walla and vicinity: This area includes all lands lying within the town of Walla Walla and vicinity beginning at the Washington-Oregon border and the west section line of Section 15…