Washington Administrative Code
Title 246 - Health, Department of
SEWER SYSTEMS
Chapter 246-272B - Large on-site sewage system regulations
Part 6 - DESIGN AND TECHNICAL STANDARDS
Subpart A - General Requirements
Section 246-272B-06200 - Sewage characterization
Universal Citation: WA Admin Code 246-272B-06200
Current through Register Vol. 24-18, September 15, 2024
(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.
Statutory Authority: RCW 70.118B.020. 11-12-035, § 246-272B-06200, filed 5/25/11, effective 7/1/11.
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