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but not to the private balconies, patios, or porches. The noise study indicates that special building treatments (i.e., construct exterior walls with either resilient channels, double-stud with resilient channels, or two layers of gypsum board and have windows and exterior doors of the units meeting Sound Transmission Class (STC) ratings between 34-36 for Site 1 and 32-34 for Site 2) will be required in order meet the noise standards. Noise Impacts on Adjacent Properties p J p The development of commercial and residential uses on the two sites will generate added urban noise, such as traffic, children playing, etc. However, given the existing noise levels produced by nearby freeway and street traffic, and the existing commercial and office uses in the area, noise levels will not change substantially from that currently experienced in the area. Furthermore, ambient noise levels could actually decrease for the existing uses south of the project sites due to the shielding of freeway traffic noise by the proposed buildings. To ensure compliance with noise requirements conditions of approval have been added requiring the applicant to adhere to the noise attenuation measures outlined in the noise study. Furthermore, the City's Noise Ordinance and standard conditions of approval limit construction activity to certain hours when it will be less disturbing to neighbors. Grading/Drainage The majority of the two lots are relatively level. Except for minor grading, the applicant is proposing to generally maintain the existing grades on both properties. Parking lot and roof drainage would drain into bioretention areas (vegetation-lined swales) and biofiltration planters that would filter contaminants from the parking lot and roof drainage before entering the arroyos and, ultimately, the bay. These are the types of stormwater runoff measure strongly supported by the Regional Water Quality Control Board and local agencies like Pleasanton implementing the urban clean water runoff program. Overall, staff finds the proposed grading and drainage plan to be acceptable, as conditioned, and that it incorporates a sufficient number of stormwater runoff measures. Landscaping Preliminary landscaping plans were submitted showing planting details for the two sites. Although the landscape plans are conceptual, staff feels that the amount and species type of the proposed landscaping for both sites is consistent with the TOD Guidelines. Standard conditions of approval regarding landscaping will ensure a much more detailed plan at the building permit stage when final landscape and irrigation plans are reviewed and approved by the Director of Community Development. Green Building As required by the City's Green Building Ordinance, the proposed project is required to qualify for at least 50 points on BuildltGreen's GreenPoint Rated Multifamily Checklist. The applicant has proposed to incorporate green building measures into Site 1 that allow the project to qualify for 77 points and 76 points for Site 2. Some of the proposed green building measures include: installing water-efficient toilets, urinals, shower heads, and faucets; using recycled flyash in the concrete mix; installing Energy Star® appliances; using FSC-certified wood; installing gearless elevators (use less energy and do not require lubricating oils); utilizing zero or low volatile organic compound (VOC) emitting paints and adhesives; and using PUD-85-08-12D, PUD-81-30-86D, and P11-0856 Planning Commission 18 of 25