ACRC stressed that container inspection and cleaning criteria followed by ACRC contractors, which is the EPA standard established in the EPA 2006 Container and Containment Rule, requires 99.99% removal of each active ingredient. A simple way to articulate this standard is “CLEAN means CLEAN, with NO residue seen.” Staining is fine, but residue is not. The most important tip for achieving this standard is proper rinsing techniques at the time of use, which can be viewed here. The ACRC website offers free training information, brochures and posters about inspection and rinsing of containers here.