AG 2013 08 19 - Laserfiche WebLink

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(29) ) excessive foaming. Any wastes containing determents, surface active agents, or other substances which may cause excessive foaming in the wastewater treatment system. (30) Explosive limit. At no time, shall two successive readings on an explosion hazard meter, at the point of discharge into the system (or at any point in the system) be more than five percent (5 %) nor any single reading over ten percent (10 %) of the lower explosive limit (LEL) of the meter. (31) Discharge of untreated wastewater. Within the boundaries of WSACC, it shall be unlawful for any person to discharge to any outlet, other than a sanitary sewer, any domestic or industrial waste except where suitable treatment has been provided in accordance with provisions of this ordinance or where an appropriate NPDES permit has been obtained. (32) Alkyl Phenal Ethoxylates (APEs). Any compounds containing APEs shall be prohibited due to the inhibiting and toxic effect of APES on the biological treatment at the POTW. Linear alcohol ethoxylates, a more readily biodegradable surfactant, may be substituted for APEs. (33) Equipment damage. Any wastewater containing chemicals, either singly or by interaction with other chemicals, to cause operational problems or damage to the POTW process equipment and /or collection system. ( c) Pollutants, substances, wastewater, or other wastes prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW. All floor drains located in process or materials storage areas must discharge to the industrial user's pretreatment facility before connecting with the system. (d) When the Executive Director determines that a user(s) is contributing to the POTW any of the above enumerated substances in such amounts which may cause or contribute to interference of the POTW operation or pass through, the Executive Director shall: 1) Advise the user(s) of the potential impact of the contribution on the POTW in accordance with Section 8.1; and 2) Take appropriate actions in accordance with Section 4 for such user to protect the POTW from interference or pass through. 2.2 National Categorical Pretreatment Standards Users subject to categorical pretreatment standards are required to comply with applicable standards as set out in 40 CFR Chapter 1, Subchapter N, Parts 405 -471 and incorporated herein. (a) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Executive Director may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c). (b) When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the Executive Director shall impose an alternate limit using the combined waste stream formula in 40 CFR 403.6(e). (c) A user may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard. 17 Attachment number 4 H -3 Page 272