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3.2-4 of the Draft EIR). The Draft EIR therefore has already adequately modeled and assessed the potential impacts of the Concurrent Extension on localized carbon monoxide air quality. E. Impact AQ-5. Toxic air contaminants. The Draft EIR concludes that, with the Deferred Extension, the Project will result in less than significant toxic air contaminant impacts after mitigation. (Impact AQ-5, Draft EIR, page 3.2-17.) Potential exposure of onsite residents to toxic air contaminants due to proximity to I-580 would not change under the Concurrent Extension because it would not alter the distance between the Project's senior housing uses and I-580. The impact of the Concurrent Extension therefore would be the same as the impact of the Deferred Extension assumed in the Draft EIR. Potential exposure of on- and off-site residents and nearby schools as a result of the Concurrent Extension still would be less than significant because, as stated in the Draft EIR, "the proposed project would not cause area roadways (other than I-580) to exceed CARB's screening threshold for high-traffic roadways, including Stoneridge Drive (even with extension of Stoneridge Drive, which is not part of the proposed project but is included in the City's General Plan)." (Draft EIR, page 3.2-18 (emphasis supplied).) Exposure from the Livermore Airport would be the same with the Concurrent Extension because Livermore Airport operations would not be affected by the Concurrent Extension. Potential increases in toxic air contaminants as a result of any increased traffic along Stoneridge Drive due to the Concurrent Extension would be offset by the corresponding reduction in traffic (and resulting toxic air contaminants) along I-580 and nearby local streets. F. Impact AQ-6. Odors The Draft EIR concludes that, under the Deferred Extension, the Project will result in less than significant odor impacts. (Impact AQ-6, Draft EIR, page 3.2-19.) Because the uses of the Project site would be the same with the Concurrent Extension, the Project would not generate any significant additional odors as a result of the Concurrent Extension. Any increase in automobile odors as a result of increased traffic through the Project site caused by the Concurrent Extension would be offset by the corresponding reduction of odors caused by slower automobile travel over greater distances around the perimeter of the Project Site as a result of the Deferred Extension and by the corresponding reduction of odors caused by any traffic diverted from I-580 to Stoneridge Drive. G. Impact AQ-7. Greenhouse gasses. The Draft EIR concludes that, under the Deferred Extension, the Project will result in less than significant greenhouse gas impacts. (Impact AQ-7, Stoneridge Drive Specific Plan Amendment and Staples Ranch Project Environmental Impact Report Findings and Statement of Overriding Considerations Page 19 of 47