WAC 16-202-335. Alternative metering devices

(1) A person shall not function as a metering device during a chemigation application. (2) A person with knowledge of the operation of both the irrigation and injection systems may function as a metering device during fertigation with a nonpressurized irrigation delivery system: Provided that the person remains on-site to continuously monitor the application and is immediately available to terminate the application in the event of any equipment malfunction.