Agenda - Council - 06/14/2005 - Laserfiche WebLink

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transportation choices. No air quality monitoring has been completed for the proposed project at this time and no mitigation measures are being proposed. Describe the type, sources, quantities and compositions Of any emissions from stationary sources of air emissions such as boilers, exhaust stacks or fugitive dust sources. Include any hazardous air pollutants (consult EAW Guidelines for a listing) and any greenhouse gases (such as carbon dioxide, methane, nitrous oxide) and ozone- depleting chemicals (chloro-fluorocarbons, hydrofluorocarbons, perfluorocarbons or sulfur hexafluoride). Also describe any proposed pollution prevention techniques and proposed air pollution control devices. Describe the impacts on air quality. Fugitive dust may be generated during construction of the project. Best management practices will be followed as they are stated within the construction specifications. It is anticipated that the project will not generate significant dust beyond current site conditions. _ Will the project generate odors, noise or dust during construction or during operation? If yes, describe sources, characteristics, duration, quantities or intensity and any proposed measures to mitigate adverse impacts. Also identify locations of nearby sensitive receptors and estimate impacts, on them. Discuss potential impacts on human health or quality of life. (Note: fugitive dust generated by operations may be discussed at item 23 instead of here.) [] No · Yes Temporary noises and odors may occur from operating heavy equipment for construction activities. Noises common to congtrucfion will be generated. Equipment will include trucks, backhoes, graders, compactors, bobcats, cranes, loaders, compressors, and possibly de-watering pumps. Construction activities will be conducted in contbrmance with the City's noise ordinance. Equipment used in the daily construction operations will be muffled. Noise fi-om construction activities will be limited to 7 am to 10 pm weekdays, with weekend hours limited to 9 am to 9 pm. Dust will be controlled by periodic cleanup of the construction site and by limiting the amount of soil disturbance at any given time. Dust will also be controlled through the establishment-of permanent vegetative cover. Consideration will be given to suppression of airborne dust by application of water if significant dust generation occurs during site grading. Odors may also be generated from ,construction equipment exhaust. As in any sanitary sewer system, there is potential for odors to form during operation of the proposed system. Hydrogen sulfide has the potential to form in sewage material under anaerobic conditions, and can produce a rotten-egg odor, particularly where flow turbulence releases gas from solution in the wastewater. The addition of chemicals to the sanitary system to suppress growth of the odor-causing bacteria is one option if hydrogen sulfide becomes a problem in the future. Filtering air ventilated from the sewtrsystem through a biofilter is another method ct' controlling odor¢, ~.isutilization of packaged carbon filtration systems. Odor problems are not exp¢cted'.to result from the trunk gewer. The project i~ similar to many in the metropolitan area. It is primarily a gravity system where ~10pes are mild and turbulence is not expected to be a problem. The nearest sensitive receptors are the residential l~pmes in the nearby existing housing developments. Average exposure times are estimated to be approximately four to eight weeks.