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Mitigation Monitoring Plan San Lorenao Lift Station Public Works Agency Project No. 06-3510 • Prior to the Commencement of Constructio - • • ~ ~ ~ • ~ • I • • • n or Demolition Activities MM-1 In order to ensure that odor impacts to nearby City of Santa Ana City of Santa sensitive receptors are reduced to a level Public Works Ana Public below significant, a passive odor control Department Works system shalt be incorporated into the design of Department the lift station foci{ity. The system shall consist of an absorber vessel {drum} with activated carbon. The drum shall be connected to the wet well by PVC ducting. The air flow shall be variable and dependent on the inflow into the wet well and the raising and lowering of the water surface within the wet well. The activated carbon shall be designed so as to scrub sewage gases and remove odor-causing hydrogen sulfide gas before venting to the atmosphere through the roof of the lift station. MM-2 Prior to the commencement of proposed City of Santa Ana Less than construction or demolition activities requiring Public Works Significant lane closures or other traffic disruptions along Department Segerstrom Avenue and/ar Bristol Street, the construction contract documents shall address measures to be undertaken during construction activities to minimize disruptions to the normal flow of traffic. Examples of measures to be undertaken include, but shall not necessarily be limited to: a) the identification of detour routes; b} signage plan identifying proposed detour routes; c) signage for advanced notification of anticipated lane closuresldisruptions; d) any necessary traffic control personnel; and e) any other measures deemed necessary to minimize disruptions to traffic during construction of the proposed pro}ect. Page 64 of 64 75E-68