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III. ENVIRONMENTAL SETTING,IMPACTS AND MITIGATION MEASURES B. AIR QUALITY Normally project's the ro'ect's affect on LOS conditions at the Charter Way/Stockton Street intersection would warrant more detailed analysis using the methodologies outlined in the CO Protocol. However,upon closer review of the project's contribution to overall traffic volumes at this intersection and the existing and existing plus project delays, such an analysis is not germane, because the project itself would make only a de minimus contribution to these impacts. The traffic analysis determined that under existing plus project conditions,the project would add 152 one-way trips to the roadway network during the a.m.peak-hour and only 20 one-way trips during the p.m.peak-hour,thereby demonstrating the project's impact would be greatest during the a.m. peak-hour. The a.m. peak-hour turning movement volumes, developed in the traffic analysis, show that the project would add just 6 trips to the Stop-sign controlled southbound Stockton Street left tum, thereby increasing the overall approach volume from 99 to 105 vehicles, an increase of less than 10 percent. As shown in Table III.0-7 of the Traffic Circulation and Safety section,the average delay at the southbound Stockton Street approach to Charter Way (expressed as seconds per vehicle) would increase from 43 to 53 seconds with the project. The project would also add 18 and 24 vehicles to the westbound and eastbound approaches of Charter Way,respectively. These volumes would increase the westbound and eastbound approach volumes by roughly 3 and 2 percent, respectively. In addition,the Charter Way approaches at this intersection are unsignalized meaning that vehicles are free of delay. Because the number of additional trips to the Charter Way/Stockton Street intersection and the resultant increases in delay related to the project would be minimal,the project's affect on CO concentrations at that intersection during the a.m.peak-hour would be considered less than significant. Mitigation Measures Proposed as Part of the Project None. Mitigation Measures Identified in This Report None required. b Impact BA: Project operations could result in nuisance odor emissions(Significant). Project operations could result in nuisance odor emissions associated with the temporary storage of municipal refuse and materials associated with the greenwaste processing operations. Odor control measures proposed by the project include ensuring that refuse is transferred from the site to a landfill in a timely fashion and not allowed to accumulate on the site for more than 48 hours. All greenwaste would be transported off-site within 72 hours of receipt at the facility. Sources of greenwaste at the site would include self-haul loads and,potentially,greenwaste collected under the City's bi-weekly curbside program. Collected greenwaste brought to the site could already be in the beginning to advanced stages of decomposition by the time it is brought to the site and therefore could be a potential source of odors. Storkton Srm,enger Transfer Station Expansion III.B.15 ESA/990190