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Chapter 16-202 WAC

|Hide DispositionsLast Update: 10/31/25

APPLICATION OF PESTICIDES AND PLANT NUTRIENTS THROUGH IRRIGATION SYSTEMS

WAC Sections

PART 1
GENERAL PROVISIONS
HTMLPDF16-202-100Purpose.
HTMLPDF16-202-110Definitions.
PART 2
GENERAL REQUIREMENTS
HTMLPDF16-202-200General chemigation requirements.
HTMLPDF16-202-210General fertigation requirements.
HTMLPDF16-202-220Site posting.
HTMLPDF16-202-230Recordkeeping.
HTMLPDF16-202-240Application tank identification.
HTMLPDF16-202-250Application tank placement.
HTMLPDF16-202-260Application tank containment.
HTMLPDF16-202-270Rinsate and backflush handling.
PART 3
SAFETY REQUIREMENTS
HTMLPDF16-202-300Antipollution safety devices.
HTMLPDF16-202-310Water source backflow prevention.
HTMLPDF16-202-315Alternative water source backflow prevention.
HTMLPDF16-202-320Application tank backflow and seepage prevention.
HTMLPDF16-202-325Alternative application tank backflow and seepage prevention.
HTMLPDF16-202-330Metering devices.
HTMLPDF16-202-335Alternative metering devices.
HTMLPDF16-202-340Product injection equipment.
HTMLPDF16-202-345Alternative product injection equipment.
HTMLPDF16-202-350System interlocks.
HTMLPDF16-202-355Alternative system interlocks.
HTMLPDF16-202-360Chemigation monitoring.
HTMLPDF16-202-370Fertigation monitoring.
PART 4
PENALTIES
HTMLPDF16-202-400Penalties.
HTMLPDF16-202-410Other dispositions of alleged violations.
DISPOSITION OF SECTIONS FORMERLY CODIFIED IN THIS TITLE
16-202-1000Chemigation. [Statutory Authority: Chapters 15.54, 15.58 and 17.21 RCW. WSR 99-22-002, § 16-202-1000, filed 10/20/99, effective 11/20/99.] Repealed by WSR 01-23-018, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW.
16-202-1001What is the purpose of this chapter? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1001, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1002How are specific terms and phrases defined in this chapter? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1002, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1003What are the general requirements in performing a chemigation operation? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1003, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1004Who may calibrate, load, start up, operate, monitor, or shut down a chemigation system? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1004, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1005What are the site posting requirements for chemigation? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1005, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1006What are the recordkeeping requirements for an application? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1006, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1007What are the identification requirements for application tanks? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1007, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1008What are the placement requirements for application tanks? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1008, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1009Under what conditions is an application tank exempt from secondary and operational area containment rules? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1009, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1010How should rinsate or backflush water from a filtration device be handled? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1010, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1011What are the general antipollution safety device requirements for a chemigation system? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1011, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1012What measures must be used to prevent backflow into the irrigation water source? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1012, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1013What alternative methods may be used to prevent backflow into the irrigation water source? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1013, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1014What are the prevention requirements for backflow into or seepage from application tanks? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1014, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1015What alternative methods may be used to prevent backflow into or seepage from application tanks? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1015, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1016What are the requirements for metering devices? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1016, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1017What are alternative methods for metering? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1017, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1018What are the requirements for product injection devices? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1018, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1019What alternative methods may be used for product injection? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1019, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1020What are the requirements for a system interlock? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1020, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1021What alternative methods can be used as a system interlock? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1021, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1022What is an appropriate monitoring schedule? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1022, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1023Public water system cross-connections or connections to a potable water supply intended for human use. [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1023, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-1024Penalties. [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-1024, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2000Fertigation. [Statutory Authority: Chapters 15.54, 15.58 and 17.21 RCW. WSR 99-22-002, § 16-202-2000, filed 10/20/99, effective 11/20/99.] Repealed by WSR 01-23-018, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW.
16-202-2001What is the purpose of this chapter? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2001, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2002How are specific terms and phrases defined in this chapter? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2002, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2003What are the general requirements in performing a fertigation operation? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2003, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2004What are the identification requirements for application tanks? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2004, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2004, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2005What are the placement requirements for application tanks? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2005, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2006Under what conditions is an application tank exempt from the secondary and operational area containment rules? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2006, filed 11/9/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2007How should rinsate from equipment or backflush water from a filtration device be handled? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2007, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2008What are the general antipollution safety device requirements for a fertigation system? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2008, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2009What measures must be used to prevent backflow into the irrigation water source? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2009, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2010What alternative methods may be used to prevent backflow into the irrigation water source? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2010, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2011What are the prevention requirements for backflow into or seepage from application tanks? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2011, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2012What alternative methods may be used to prevent backflow into or seepage from application tanks? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2012, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2013What are the requirements for metering devices? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2013, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2013, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2014What are alternative methods for metering? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2014, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2015What are the requirements for product injection devices? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2015, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2016What alternative methods may be used for product injection? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2016, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2016, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2017What are the requirements for a system interlock? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2017, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2017, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2018What alternative methods can be used as a system interlock? [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2018, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2018, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2019What is an appropriate monitoring schedule? [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2019, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2020Public water system cross-connections or connection to a potable water supply intended for human use. [Statutory Authority: Chapters 15.54, 15.58, 17.21, and 34.05 RCW. WSR 01-23-018, § 16-202-2020, filed 11/9/01, effective 11/9/01. Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2020, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).
16-202-2021Penalties. [Statutory Authority: Chapters 15.54, 15.58, and 17.21 RCW. WSR 01-13-063, § 16-202-2021, filed 6/18/01, effective 11/9/01.] Repealed by WSR 25-22-066, filed 10/31/25, effective 12/1/25. Statutory Authority: RCW 17.21.030, 15.58.040(2), and 15.54.800(2).