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440 <br />(C) TEXTILE WASTE: ALL LINT, THREAD, PIECES OF CLOTH, AND YARN <br />IN EXCESS OF CONCENTRATIONS PRESENT IN NORMAL DOMESTIC SEWAGE SHALL BE <br />REMOVED PRIOR TO DISCHARGE. KIERING AND ACID BOILING WASTES SHALL BE COOLED, <br />NEUTRALIZED AND STABLIZED WITHIN THE LIMITS SPECIFIED IN §24-14. BLEACHERY <br />WASTE SHALL BE COOLED, NEUTRALIZED AND STABLIZED WITHIN THE LIMITS <br />SPECIFIED IN §24-14. SULFUR DYEING WASTES SHALL NOT BE ADMITTED TO THE <br />SANITARY SEWER SYSTEM. <br />(D) METAL SALTS (IRON, COPPER, ZINC, NICKEL, CHROMIUM, CADMIUN, LEAD, <br />ETC.): SALTS OF IRON, COPPER, ZINC, NICKEL, CHROMIUM, LEAD OR OTHER HEAVY <br />METALS IN EXCESS OF CONCENTRATIONS PRESENT IN NORMAL DOMESTIC SEWAGE SHALL <br />BE PRECIPITATED AND REMOVED FROM WASTE FLOW PRIOR TO DISCHARGE TO THE <br />SANITARY SEWER SYSTEM. WASTE CONTAINING HEXAVALENT CHROMIUM SHALL HAVE <br />CHROMIUM REDUCED TO THE TRI -VALENT STATE, PRECIPITATED AND REMOVED FROM THE <br />WASTE FLOW PRIOR TO DISCHARGE TO THE SANITARY SEWER SYSTEM. <br />(E) CYANIDES: CYANIDES IN THE WASTE FLOW SHALL BE COMPLETELY <br />REDUCED TO CARBON DIOXIDE AND NITROGEN PRIOR TO DISCHARGE TO THE SANITARY <br />SEWER SYSTEM. <br />(F) PHENOL: WASTES CONTAINING PHENOL MAY BE DISCHARGED TO THE <br />SANITARY SEWER SYSTEM ONLY WITH A PERMIT ISSUED PURSUANT TO §24-19. <br />BEFORE GRANTING SUCH PERMISSION THE DIRECTOR OF PUBLIC WORKS SHALL REQUIRE <br />THE PERSON PROPOSING TO MAKE SUCH DISCHARGE TO ENTER INTO AN AGREEMENT <br />WITH THE DEPARTMENT OF PUBLIC WORKS OR THE RIVANNA WATER AND SEWER <br />AUTHORITY, WHEREBY SUCH PERSON SHALL REGULATE, VARY OR MAINTAIN THE <br />DISCHARGE OR CONCENTRATION OF PHENOL IN ACCORDANCE WITH THE REQUIREMENTS <br />OF THE CITY AND THE AUTHORITY. <br />SECTION 24-16. LIMITATIONS ON DISCHARGE OF CONCENTRATED WASTES. <br />(A) NO PERSON SHALL DISCHARGE WASTES HAVING A B.O.D. OR SUSPENDED <br />SOLIDS CONCENTRATION IN EXCESS OF 240 PARTS PER MILLION, DEFINED AS <br />INDUSTRIAL WASTES BY §24-12(F), INTO THE SANITARY SEWER SYSTEM WITHOUT <br />HAVING FIRST OBTAINED A PERMIT FOR SUCH DISCHARGE AS PROVIDED IN §24-19. <br />(B) DISCHARGE OF WASTES HAVING A B.O.D. OR SUSPENDED SOLIDS <br />CONCENTRATION IN EXCESS OF 500 PARTS PER MILLION SHALL BE PERMITTED BY THE <br />DIRECTOR OF PUBLIC WORKS ONLY AFTER REVIEW AND APPROVAL BY THE RIVANNA <br />WATER AND SEWER AUTHORITY WITH RESPECT TO THE POINT OF DISCHARGE INTO THE <br />SANITARY SEWER SYSTEM AND THE DILUTION AFFORDED BY OTHER WASTE FLOWS <br />OCCURRING IN THE SYSTEM AT SUCH POINT. <br />(C) DISCHARGE OF WASTES HAVING A B.O.D. CONCENTRATION IN EXCESS OF <br />800 PARTS PER MILLION OR A SUSPENDED SOLIDS CONCENTRATION IN EXCESS OF <br />700 PARTS PER MILLION SHALL NOT BE PERMITTED, AND IS HEREBY PROHIBITED. <br />SECTION 24-17. PERMITS AND AGREEMENTS FOR NON -CONFORMING DISCHARGE. <br />NOTWITHSTANDING THE PROVISIONS OF §§24-13 THROUGH 24-16 ANY PERSON <br />MAY APPLY TO THE DIRECTOR OF PUBLIC WORKS FOR A PERMIT UNDER §24-19 <br />TO DISCHARGE WASTE INTO THE SANITARY SEWER SYSTEM, WHICH IS OF AN UNUSUAL <br />OR OTHERWISE PROHIBITED STRENGTH OR CHARACTER. SUCH PERMIT SHALL BE <br />GRANTED BY THE DIRECTOR ONLY UPON EXECUTION BY SUCH PERSON OF AN AGREEMENT, <br />• <br />• <br />• <br />• <br />