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PDFWAC 173-226-100

Prohibited discharges.

(1) No general permit issued by the department shall authorize any person to:
(a) Discharge any radiological, chemical, or biological warfare agent or high-level radioactive waste into waters of the state;
(b) Discharge any pollutants that the Secretary of the Army acting through the Chief, Corps of Engineers, finds would substantially impair anchorage and navigation;
(c) Discharge any pollutant which the regional administrator, not having waived his/her right to object pursuant to section 402(e) of the FWPCA, has objected in writing pursuant to section 402(d) of the FWPCA;
(d) Discharge any pollutant in conflict with plans or amendment thereto approved pursuant to section 208(b) of the FWPCA;
(e) Discharge any pollutant subject to a toxic pollutant discharge prohibition under section 307 of the FWPCA; or
(f) Discharge any dangerous waste as defined in the Dangerous waste regulations, chapter 173-303 WAC, into a subsurface disposal system such as a well or drainfield.
(2) The following discharges to municipal sewerage systems are also prohibited:
(a) Waste materials that pass through the treatment works untreated or interfere with its operation or performance;
(b) Liquids, solids, or gases that, by reason of their nature or quantity, are or may be sufficient either alone or by interaction to:
(i) Cause fire or explosion;
(ii) Create a public nuisance or hazard to life;
(iii) Prevent entry into the sewers for their maintenance and repair; or
(iv) Be injurious in any other way to the operation of the system or the operating personnel;
(c) Solid or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the system;
(d) Any wastewater having a pH less than 5.0 or greater than 11.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the system, unless the system is specifically designed to accommodate such discharge and the discharge is authorized by a permit under this chapter;
(e) Wastewater that would cause the influent temperature to exceed 40°C (104°F), unless the system is specifically designed to accommodate such discharge and the discharge is authorized by a permit under this chapter. In any case, any wastewater having a temperature which will interfere with the biological activity in the system is prohibited;
(f) Waste materials, including, but not limited to, oxygen demanding waste materials (BOD, etc.) released in either a slug load or continuous discharge of such volume or strength as to cause interference to the system;
(g) Any other discharge prohibited by federal or state law or regulation; and
(h) Any of the following discharges, unless approved by the department under extraordinary circumstances (such as lack of direct discharge alternatives due to combined sewer service or need to augment sewage flows due to septic conditions):
(i) Noncontact cooling water in significant volumes;
(ii) Stormwater and other direct inflow sources;
(iii) Waste waters significantly affecting system hydraulic loading that do not require treatment or would not be afforded a significant degree of treatment by the system.
[Statutory Authority: Chapter 90.48 RCW. WSR 93-10-099 (Order 92-55), § 173-226-100, filed 5/5/93, effective 5/19/93.]
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