“By June 8, 2004, surface water systems which recycle spent filter backwash water, thickener supernatant, or a liquid from dewatering process shall return these flows through the existing conventional filtration treatment or direct filtration treatment, or through an alternative location that is approved by the director. Failure to comply with this paragraph is a treatment technique violation.”
-Environmental Protection Agency
To paraphrase this statement in June 8, 2004 it was made law that any water filtration systems that recycle spent filter backwash water should now put the flows through conventional filtration treatment or direct filtration treatment. The backwash water could also be put to another place as long as it is approved by a director. If you do not follow these rules then it is a treatment technique violation.
Filtration Backwash Recycling. http://www.epa.ohio.gov. 03 August 2009. Environmental Protection Agency. 9 November 2010. <http://www.blogger.com/%3Chttp://www.epa.ohio.gov/portals/28/documents/rules/Final/3745-81-79_effective_08-03-04.pdf%3E.>.
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