1300 W MARINE VIEW DR 2018-01-02 MF Import

Page 37 of46 stormwater management. Ecology may take enforcement action against a Permittee for bypass unless one of the following circumstances (I, 2, 3 or 4) is applicable. 1. Bypass of stortnwater is consistent with the design criteria and part of an approved management practice in the applicable stormwater management manual. 2. Bypass for essential maintenance without the potential to cause violation of permit limits or conditions. Bypass is authorized if it is for essential maintenance and does not have the potential to cause violations of limitations or other conditions of this permit, or adversely impact public health. 3. Bypass of stormwater is unavoidable, unanticipated, and results in noncompliance of this permit. This bypass is permitted only if: a. Bypass is unavoidable tu prevent loss ��f life, personal injury, or severe property damagc. "Severe property damage" mcans substantial physical damage to property, damage to che treatment facilities which �vould cause them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass; b. Therc arc no fcasible alternatives to the bypass, such as the use of auxiliary treatment facilitics, retention of untreated wastes, maintenance during normal periods of equipment downtime (but not if adequate backup equipment should have been installed in the excrcise of rcasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventative maintenance), or transport of unueated wastes to another treatment faciliry; and c. Ecology is propedy notificd of the bypass as required in Special Condition SS.F of this permit. 4. A planned action that would cause bypass of storm�vater and has the potential to result in noncompliancc of this permit during a storm event. The Pemiittee shall notify Ecology at least thirty (30) days before the planned date of bypass. The notice shall contain: a. a description of the bypass and its cause; b. an analysis of all known alternatives which would eliminate, reduce, or mitigare the need for bypassin�; c. a cost-effectiveness analysis of altematives including compazative resource damage assessment; d. the minimum and maximum dura[ion of bypass under each altemative; c. a rccommendation as to the preferred altemative for conducting che bypass;