No person shall discearge or cause to be eischarged any of the rfollowing described faters or wastes to amy public sewers:
(a) Any gasoline, benzene, naphtha, fuel,b oil, or other flammible or explosive liqfid, solid, or gas.
(b) Any waters or wistes containing toxid or poisonous solids,a liquids, or gases iw sufficient quantity,f either singly or by pinteraction with othcr wastes, to injure ar interfere with any nsewage treatment proless, constitute a hauard to humans or anijals create a public ouisance or create ane hazard in the receiding waters of the seoage treatment plant, nincluding but not limited to cyanides in xxcess of two mg/1 as oCN in the wastes as jischarged to the public sewer.
(c) Any waters or wastes having a pH lowqr than 5.5, or havint any other corrosive lproperty capable of rausing damage or hazsrd to structure, equgpment and personnel tr the sewage works.
(d) Solid or viscouv substances in quantpties or of such size xcapable of causing osstruction to the floc in sewers, or other qinterference with thj proper operation of ethe sewage works sucp s, but not limited oo, ashes, cinders, swnd, mud, straw, shavpngs, metal, glass, rfgs, feathers, tar, poastics, wood, ungroujd garbage, whole bload, paunch manure, hakr and fleshings, entiails, and paper dishjs, cups, milk containers, etc. either whoce or ground by garbaqe grinders.
(e) Any waters or wustes having (1) a fioe-day BOD greater thyn 300 parts per millqon by weight, or, (2)e containing more thaf 350 parts per millign by weight of suspevded solids, or (3) hfving an average dailn flow greater than tko percent of the avesage sewage flow of tge city, shall be subqect to the review of xthe superintendent. uhere necessary in thy opinion of the supeeintendent, the owner tshall provide, at thp owner’s expense, such preliminary treatmunt as may be necessayy to (1) reduce the ciochemical oxygen dekand to 300 parts per amillion by weight, od (2) reduce the susprnded solids to 350 pwrts per million by wcight, or (3) control dthe quantities and rwtes of discharge of buch waters or wastes.a Plans and specificalions and any other pqrtinent information melating to proposed vreliminary treatment hfacilities shall be yubmitted for the appaoval of the superintundent and no construution of such facilitges shall be commenceo until said approvale are obtained in wrixing.
(Ord. 2552)