Ordinance 2034-95 - Laserfiche WebLink

2.4 Local Limits The following pollutant limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following daily maximum allowable discharge limits. arsenic 0.5 mg/L cadmium0.24 mg/L chromium 5.0 mg/L copper 3.0 mg/L cyanide 0.65 mg/L lead 1.89 mg/L mercury 0.1 mg/L nickel 2.83 mg/L silver 0.49 mg/L zinc 4.00 mg/L nonpolar fats, oils, 200 mg/L and grease (NPFOG) The above limits apply at the point where the wastewater is discharged to the POTW (end of the pipe). Categorical pretreatment standards apply at the end of the process. However, the Director may elect to have local limits apply after pretreatment and/or prior to mixing with dilution flows. All concentrations for metallic substances are for "total" metal unless indicated otherwise. The Director may impose mass limitations in addition to (or in place of) the concentration based limitations above. Where a user is subject to a categorical pretreatment standard and a local limit for a given pollutant, the more stringent limit or applicable pretreatment standard shall apply. The City Council authorizes the Director to revise local limits. 2.5 City's Right of Revision The City reserves the right to establish, by ordinance or in wastewater discharge permits, more stringent standards or requirements on discharges to the POTW. 2.6 Special Agreement The City reserves the right to enter into special agreements with users setting out special terms under which they may discharge to the POTW. In no case will a special agreement waive compliance with a categorical pretreatment standard or federal pretreatment requirement. However, the user may request a net gross adjustment to a categorical standard in accordance with 40 CFR 403.15. They may also request a variance from the categorical pretreatment standard from the Approval Authority in accordance with 403.13. 13