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b. Indicate the number, location, size, and use of any above or below ground tanks to be used for storage of petroleum products or other materials (except water). Response: The City of Roseville has generated large amounts of data documenting the hazardous wastes within the Twin Lakes Development Area (see Question 9 and Attachment B). No additional hazardous wastes associated with development or redevelopment have been established at this time. Future occupants that generate hazardous materials will be required to conform to applicable laws. 22. Traffic Parking spaces added _ Existing spaces (if project involves expansion) _ Estimated total Average Daily Traffic (ADT) generated 8,100 Estimated maximum peak hour traffic generated (if known) and its timing: 1,060,4:30 to 5:30 p.m. For each affected road indicate the ADT and the directional distribution of traffic with and without the project. Provide an estimate of the impact on traffic congestion on the affected roads and describe any traffic improvements which will be necessary. Response: A comprehensive traffic analysis was completed to determine the traffic impacts resulting from the proposed redevelopment of the Twin Lakes area. The detailed traffic analysis is appended to the back of this document as Appendix B. The following paragraphs were derived from the analyses in response to this question. The proposed Twin Lakes redevelopment project is expected to result in 8,100 additional daily vehicle trips to and from the Twin Lakes area, including an additional 230 inbound and 830 outbound vehicle trips during the Year 2011 post-development PM peak hour. The major roadways that are expected to be affected by the traffic volume increases are shown in Figure B 1 0 (Appendix B) along with the projected Year 2011 ADT demands with and without the proposed project. The proposed Twin Lakes redevelopment project is expected to result in no significant traffic impacts. Several of the traffic impacts identified in the analysis (Appendix B) are attributed to the background traffic conditions and would be expected to occur without the Twin Lakes redevelopment. The minor traffic impacts imparted by the redevelopment project are expected to be mitigated by constructing exclusive right turning lanes at selected intersection approach locations. 23. Vehicle-related Air Emissions. Provide an estimate of the effect of the project's traffic generation on air quality, including carbon monoxide levels. Discuss the effect of traffic improvements or other mitigation measures on air quality impacts. (If the project involves 500 or more parking spaces, consult EA W Guidelines about whether a detailed air quality analysis is needed.) Response: The potential air quality impacts of the proposed Twin Lakes redevelopment were identified by modeling future traffic flow and the resulting carbon monoxide (CO) concentrations in the project area. The air quality analysis was based upon traffic forecasts developed for this EA W as documented in the response to Question #22. The total predicted CO concentration at a specific location is a function of the background CO levels (derived from air quality monitoring) and the local CO emissions (determined through modeling). Impacts are identified by comparing the predicted CO concentrations to the applicable state ambient air quality standards. The state ambient air quality standards for CO, shown in Table I, were #24397 16