06-096 C.M.R. ch. 570, § 1 - Criteria for acceptable CSOs
A discharge from a combined overflow point within a sewerage system is permitted only when the discharge meets the following conditions.
A.
Discharge in
excess of design capacity. The discharge consists of wastewater in
excess of design capacity of a municipal or quasi-municipal sewerage system,
including pumps or treatment facilities, that conveys both sanitary wastes and
stormwater in a single pipe system and that is in direct response to a storm
event or snow melt;
B.
Discharge not due to mechanical failure. The discharge is not the result
of mechanical failure, improper design or inadequate operation or maintenance,
and;
C.
CSO Master
Plan. The licensee is actively developing or implementing a CSO Master
Plan in accordance with this chapter, and as approved by the department; or the
licensee has implemented the CSO Master Plan and a discharge occurs that is
caused by conditions exceeding those upon which the Plan is based.
Notes
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