Section 246-272B-06200 - Sewage characterization(1) The design engineer shall identify sewage characteristics in terms of the following: (a) CBOD5, TSS, O&G, BOD5, and fecal coliform bacteria;(b) Other parameters that can impact treatment anywhere in the treatment sequence including, but not limited to, pH, temperature and dissolved oxygen; and(c) Nitrogen and phosphorus, where either parameter is identified as a contaminant of concern.(2) For LOSS treating sewage from nonresidential or commercial sources, the design engineer shall submit: (a) Discharger information to show the sewage is not from an industrial facility;(b) Sewage characterization that identifies any parameters not typically found in residential strength sewage; and(c) Data that demonstrates that effluent quality is or will be equivalent to or better than effluent from a properly sized septic tank treating residential strength sewage.Wash. Admin. Code § 246-272B-06200
Statutory Authority: RCW 70.118B.020. 11-12-035, § 246-272B-06200, filed 5/25/11, effective 7/1/11.