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Appendix E (Initial Study/Part • • Page 10 on-site office tenants. Stationary mechanical equipment would include such items as heatinglventilation and air conditioning (HVAC) equipment. This could be a substantial source of noise depending on distance and inclusion ofnoise-reducing features. Mitigation: ~To ensure that acceptable operational noise levels are maintained in the project vicinity and noise conflicts between the project and surrounding uses are avoided, the following measures should be implemented: • Noise should be considered in the design and location of all stationary mechanical equipment and exterior vents (e.g., equipment and vents should face away from sensitive noise receptors, vent covers should be baffled, if necessary, etc.). Implementation of this mitigation measure would result in a less than significant impact. The previous evaluation identified a third potential impact, that ofproject-generated traffic noise. The study found that this traffic noise would result in a less .than significant noise impact to nearby noise receptors and no mitigation measures are required. The revised traffic analysis prepared for the proposed project indicates that traffic impacts are anticipated to be similar to those identified for the previous application. Therefore, traffic noise is still anticipated to result in a less than significant impact. The fourth potential impact is that the project would develop office land uses in an area where noise levels would be "conditionally acceptable" (bordering on "normally unacceptable" for residential uses) for such uses. Ambient noise levels at the proposed Creekside Plaza are in the range of 60 to 70 Ldn which is considered "conditionally acceptable" under the General Plan for office land uses. The General Plan states that conventional construction, but with closed windows and fresh air supply systems or air conditioning, will normally suffice to address this concern. The proposed office uses are those which would be supplied with air conditioning and ventilating equipment and are typically operated with closed windows. The office land use is therefore not in conflict with the General Plan and would be a less than significant effect of the project. No mitigation, measure is required for the proposed office uses. 7. The construction of office and parking uses on-site will include the placement of lighting standards throughout the site. New forms of light and glare associated with on-site uses will also include interior nighttime lighting of the office uses and lighting in the tri-level parking structure. The proposed change in land use would likely result in a moderate increase in the amount of glare produced on-site during the evening hours. Mitigation: All lighting fixtures shall be diverted away from residences and be designed and equipped with shields to .eliminate. off-site glare onto adjoining residential properties. Implementation of this mitigation measure would result in a less than significant impact. 8. The proposal to develop 180,000 square feet of office space, a 13,000 square foot environmental education center, and a 503-car, tri-level parking garage on a vacant lot that previously housed the City's Corporation Yard represents a change in the existing land use. This change is not considered substantial because the property is consistent with the Plaza 2 Creekside Plaza - IS/Part 2 ___