Events Requiring Notification

(1) A Permittee must issue a public advisory notification for the following events: (a) any Combined Sewer Overflow; (b) any discharge of partially treated wastewater, including blended wastewater; (c) any Sanitary Sewer Overflow that discharges through a wastewater outfall, either directly or indirectly, to a surface water of the Commonwealth; (d) any SSO that flows into a surface water of the Commonwealth and is the result of the sanitary sewer system surcharging under high flow conditions when peak flows cannot be conveyed to a POTW due to capacity constraints; and (e) any SSO that flows into a surface water of the Commonwealth and is the result of a failure of a wastewater pump station or associated force main designed to convey peak flows of one million gallons per day or greater. (2) A permittee is not required to issue a public advisory notification for SSOs that are regulated under 314 CMR 12.00: Operation and Maintenance and Pretreatment Standards for Wastewater Treatment Works and Indirect Dischargers, except for the SSO events specified in 314 CMR 16.03(1)(c) through (e).