The WRD Manager is authorized to establish and revise local limits pursuant to 40 CFR Part 403.5(c). The pollutant limits (local limits) will be established to protect against pass through and interference. No significant industrial user (SIU) shall discharge wastewater containing in excess of the limits established by the WRD Manager. The local limit shall have precedence if it is more stringent than the categorical pretreatment standard for the industrial user, and shall be enforced as the standard at the point of discharge to the sewer system. The local limit shall be identified in the industrial waste discharge permit of the industrial user discharging the pollutant.

The local limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for the total metal unless indicated otherwise. The WRD Manager may impose mass limitations in addition to concentration-based limitations.

All new domestic wastewaters from restrooms, showers, drinking fountains, etc., unless specifically included as part of a categorical pretreatment standard, shall be kept separate from all industrial wastewaters until the industrial wastewaters have passed through a required pretreatment system and the industrial user’s monitoring facility. When directed to do so by the WRD Manager, any industrial user may be required to separate existing domestic wastestreams. The WRD Manager shall endeavor to keep the Regional Committee apprised of the status of local limits and pollutant levels.