- (1) Unpackaged biosolids and packaged biosolids that do not meet the definition for commercial fertilizer must include a legible and conspicuous disclaimer on their labeling. The disclaimer must specifically state that the product is not a commercial fertilizer, and that any nutrient claims are estimates or averages and are not guaranteed.
- (2) Packaged biosolids that meet the definition for commercial fertilizer must be registered as commercial fertilizer.
[Statutory Authority: RCW 15.54.270(4) and 15.54.800. WSR 00-19-058, § 16-200-703, filed 9/18/00, effective 10/19/00.]