Project Number:

3802

Wallace Substation

SERVICE:

Acoustic Study

DESCRIPTION:

Tech performed an acoustic study on a proposed substation in Wakefield, MA. The purpose of the study was to determine compliance with the MassDEP noise policy, for both total and tonal noise, at the closest residential property. The proposed project would consist of two phases: Construction of two 60-MVA low-noise transformers on the southern half of the site and the addition of two 2.5-MW generators for peak power production on the northern half of the site. Tech collected sound level measurements at locations surrounding the site to document the existing acoustic environment prior to construction. Using a 3D model, Tech calculated maximum sound levels from the substation. The predicted levels were compared with the MassDEP noise policy. Tech found that the mechanical equipment proposed for this site would not increase the ambient level by more than the allowable 10 dBA, nor would it create a pure tone. Because of this, they were able to conclude that the substation would be in compliance and would not be considered a nuisance. Testimony was given by Tech in a public hearing in Wakefield.

Print   Email

Key Points

  • Tech performed background sound monitoring and acoustic modeling to demonstrate compliance with the MassDEP noise policy for a proposed substation.
  • The predicted sound levels at the closest residential property lines were below the MassDEP allowable limits with no pure tones found, concluding the mechanical equipment would be in compliance and would not be considered a nuisance.