2020 toxic aerial spray FPAs ## 2817507, 2817508, 2817509 by Sierra Pacific Industries (SPI). Sultan-Gold Bar area. Some of toxic ingredients include Glyphosate and Imazapyr. Please direct your short questions, comments and requests to SPI 360-424-7619/ihope@spi-ind.com and DNR northwest.region@dnr.wa.gov.