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meets and exceeds the number of parking spaces required by the municipal code for multiple family residential district. The Standards established requirements for parking location and treatment. One of the requirements (A7.1) specifies that if the parking cannot be located behind buildings or below grade, that it should be screened by low walls and landscaping. The applicant proposed a block wall along the southern property line and a fence along the western property line to separate the subject site from the adjoining properties. In addition to the existing trees along the property lines, tree and shrubs are proposed to be planted along the proposed wall and fence to help screen the views of the parking areas. The proposed design provides screening that meets the standards. Noise External noise sources that could affect the site include traffic noise from adjacent City streets, and adjacent land uses. For multi-family housing projects, the City's General Plan requires that outdoor recreation areas not exceed 65 dB Ldn and that indoor noise levels not exceed 45 dB Ldn (day/night average sound level). Staff notes that the outdoor noise standard applies to the common outdoor recreation areas such as pools, spas, play areas, seating areas, etc., but not to the private balconies, patios, or porches. A noise study (Exhibit B) was prepared to ensure that the project will meet General Plan noise standards. The noise study indicates that the exterior noise levels for the project would comply with the General Plan standard and that the interior noise levels would comply with the General Plan standard with recommended noise mitigation measures. As recommended by the Noise Study, the project needs to incorporate sound rated windows and doors to reduce vehicle traffic noised to DNL (day/night average sound level) 45 dBA or less indoors. The study recommends incorporating windows and doors with sound insulation rating of STC (Sound Transmission Class) of 30 in units that would be located in Building A and Building B along West Las Positas Boulevard. The report also recommends incorporating windows and doors with a STC rating of 28 in other locations. The study further requires the final design and sound insulation ratings be reviewed by an acoustical consultant prior to construction. Staff has included a condition to address this item. The Noise Study also included analysis of mechanical equipment noise associated with the project such as rooftop HVAC units. The study recommends that an acoustical consultant review manufacturer's specification data for the equipment to determine noise reduction measures, if any. Staff has included a condition to address this item. Noise Impacts on Adjacent Properties The proposed development would generate added urban noise, such as traffic, loading and unloading of delivery trucks, children playing, etc. However, given the existing noise levels produced by nearby street traffic, and the existing school's field, and City's Sports Park in the area, noise levels would not change substantially from what is currently experienced in the area. PUD-103/Summerhill Apartment Communities Planning Commission Page 20 of 34