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P26-0704, 1047 Serpentine Lane, Suites 400 and 500 Planning Commission <br />7 of 8 <br />and that parking and circulation on the subject site or surrounding properties would not be <br />adversely affected. <br /> <br />As an additional safeguard, the recommended conditions of approval would limit the number of <br />people associated with the indoor recreation facility to a maximum of 10 on-site at any one <br />time. A condition of approval would also authorize the Director of Community and Economic <br />Development to refer the Conditional Use Permit back to the Planning Commission should <br />parking problems attributable to the use occur in the future. If necessary, the Planning <br />Commission could consider additional measures, such as modifying operating hours, further <br />limiting the number of clients or employees permitted on -site at one time, requiring additional <br />parking management measures, or otherwise modifying the CUP to address demonstrated <br />parking impacts. <br /> <br />Noise <br />Conditional uses must be consistent with PMC Chapter 9.04 (Noise Regulations), which are <br />designed to promote stability of existing conforming land uses and protect them from <br />inharmonious or intrusive impacts from new land uses. For industrially zoned properties, PMC <br />Chapter 9.04.050 specifically limits noise to a maximum of 75 dBA1 at any point outside the <br />property line at any time. <br /> <br />Staff finds the proposed use compatible with the surrounding development and unlikely to <br />result in a substantial increase in ambient noise at nearby sensitive receptors. The site is <br />already influenced by existing background noise from Valley Avenue, Stanley Boulevard, and <br />the Union Pacific rail corridor. All activities would occur entirely within the enclosed building <br />and would be similar in character to other indoor recreation, office, commercial, educational, <br />and assembly-type uses that operate within the Valley Business Park without reported issues. <br /> <br />The applicant has not proposed any amplified speech or music as part of the facility's <br />operations. Based on this, interior sound levels for speech and music would be expected to <br />comply with the PMC’s 75 dBA exterior standard. <br /> <br />Staff also recommends conditions of approval to ensure ongoing compatibility, including: (1) <br />compliance with the noise, parking, and outdoor smoking area requirements; (2) advising <br />employees and clients to minimize outdoor noise and loitering; and (3) reserving the City’s <br />right to reevaluate the CUP and impose additional conditions if substantiated complaints occur, <br />such as limiting occupancy or hours of operation or requiring additional soundproofing. <br /> <br />Given the lack of amplified speech or music associated with the proposal and recommended <br />conditions, staff believes the proposed use would not create harmful noise intrusions, would <br />remain within applicable PMC noise standards, and would be compatible with existing and <br />future surrounding uses. <br /> <br /> <br />1 A-weighted decibels, a measurement of sound level that adjusts for the way the human ear perceives different <br />frequencies. Unlike raw decibel (dB) measurements, which capture all sound pressure levels equally, dBA applies <br />a filter that reduces the influence of very low and very high frequencies—where human hearing is less sensitive— <br />while emphasizing mid-range frequencies (around 250–5,000 Hz), where the ear is most responsive. This makes <br />dBA a more accurate representation of perceived loudness and the potent ial impact of noise on human health <br />and comfort. It is widely used in environmental noise monitoring, occupational safety (e.g., workplace hearing <br />protection requirements), and product ratings (like dishwashers, HVAC units, and vehicles).