Reso PC22-08 0085 PC Reso Recommending CEQA

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Findings and Statements Required by the California Environmental Quality Act Harbor View Project PAGE 45 OF 48 ESA / 170951 Final Environmental Impact Report October 2022 ATTY/RESO.0085/PC RESO RECOMMENDING CEQA – EXHIBIT A REV: 11-02-2022 VR The conservatively significant cumulative air quality impact identified for the Revised Project (Impact AIR-1.CU) (exceeding growth assumptions of the 2017 Clean Air Plan) would continue to occur with the “Reduced Building and Building Height” Alternative since the Office land use program is the same for both scenarios. Similarly, all transportation impacts of the Revised Project would continue to occur under this alternative. The “On-site Public Amenities” Alternative also involves wholly new impacts not previously identified with the Revised Project; these pertain to aesthetics (light/glare), air quality (TAC/dust emissions), and noise compatibility, each discussed below. As-needed pole lighting associated with the outdoor recreation fields in this alternative could temporarily increase nighttime glare that could potentially impair drivers. This is conservatively identified as a new less-than-significant impact directly associated with the new recreation use. A new mitigation measure would reduce the impact under this alternative to less than significant. This alternative introduces two sensitive receptor uses on the project site: users of the outdoor recreational fields and ancillary child care located within the proposed amenities building for use by site employees. As discussed in detail in the DEIR (pp. 5-35 – 5-36), it is reasonable that a new impact and mitigation measure not identified for the Revised Project would be warranted due to the proximity and exposure of these new sensitive receptors to existing dust and toxic air contaminants (TAC): key sources of concern include but are not necessarily limited to, vehicles traveling on Highway 101 and the operation of the Graniterock concrete processing facility across Blomquist Street from the project site. New mitigation measure with the “On-site Public Amenities” Alternative would reduce the impact to less than significant. The new mitigation measures could require preparation of a health risk assessment (HRA) to show if the health risk exceeds acceptable levels, or the alternative could otherwise incorporate appropriate measures into the site design to reduce the potential health risk. The DEIR discusses that outdoor recreation fields (Open Space/Recreation land use) are considered relatively noise tolerant by the General Plan Noise Guidelines (per Table 4.10- 1 in section 4.10, Noise, of the DEIR). Noise levels of up to 75 CNEL are considered normally acceptable for such uses, and the area where the recreation fields are proposed have an ambient noise level of generally less than 70 DNL, which is consider “normally acceptable.” (City of Redwood City, 2014). The impact would be less than significant, same as with the Revised Project. However, the proposed ancillary child care use with this alternative is considered a noise- sensitive use, since it involves rest and recovery, relaxation and concentration. As also discussed in the Environmental Setting in Section 4.10 in Chapter 4 of the DEIR, increased noise levels tend to disrupt such activities. The amenities building where the ancillary day care center use (Public Facilities/Schools) will be located is proposed is 70 DNL (City of Redwood City, 2014), whereas the General Plan Noise Guidelines in Table 4.10-1 in the DEIR indicate that an ambient noise environment between 65 to 75 DNL is “conditionally acceptable” exposure for a day care use. “Conditionally acceptable” means that new development should be undertaken only after a detailed analysis of noise reduction requirements is made and incorporated into the project. The amenities building where the