Any categorical user that operates its regulated processes so that no industrial waste is discharged to the POTW may request that a zero discharge permit (ZDP) be issued by the city. To be eligible for a ZDP, the user shall demonstrate to the director’s satisfaction that no industrial waste will be discharged and shall either permanently seal all accesses to the POTW other than those required for disposal of domestic sewage or install shutoff devices that will accept city-installed, tamper-evident seals. Breaking this seal without prior authorization by the director shall be a violation of the ZDP and this chapter. (Ord. 3070-08 § 3.4, 2008.)