The Challenge
Preparing a noise study for the proposed California Motocross Park to comply with Placer County environmental requirements. The 158-acre park will consist of several outdoor motocross tracks for various sizes of motorcycles, all-terrain vehicles, and BMX bicycles, as well as a partially enclosed arena with a motocross track.
The Strategy
To determine compatibility of noise from the proposed Park with residential areas nearby, HMMH conducted measurements of existing noise levels. We used the SoundPLAN® model to project worst-case noise conditions at the homes and at the property boundary. Our noise study showed that the facility would comply with two different county noise requirements:
- Limits in the nearest sensitive areas on maximum sound level (Lmax) and hourly average sound levels (Leq)
- Limits at the property boundary on 24-hour average sound levels (Ldn)
The Solution
Even under worst-case conditions, noise levels from the facility are expected to comply with the County requirements, and also be well below existing ambient noise levels.
