Section 250-RICR-150-10-2.10 - POTW Pretreatment Programs: Development and Implementation by POTWA. All POTWs required to develop a Pretreatment Program shall include pretreatment standards that meet the requirements for Pretreatment Programs by POTWs, as set forth in the requirements found at 40 C.F.R. § 403.8 (2018), incorporated above at § 2.3 of this Part, which are hereby amended to include the following additional requirement: 1. Zero Discharge Permits shall be issued for Categorical Industrial Users that do not discharge industrial process wastewater to the sewer and that generate over 100 gallons per day of industrial process wastewater. Further, all such industries shall be inspected by the POTW at least annually to verify zero discharge status. Certification of zero discharge must also be submitted by the Industry to the Pretreatment Program a minimum of annually.250 R.I. Code R. 250-RICR-150-10-2.10