1-5 Noise

Please explain in detail the expected noise levels...

1-5       Please explain in detail the expected noise levels that will be generated during (a) normal operations, (b) startup operations, (c) normal shut down operations, (d) steam releases, and (e) emergency shut down operations.  Please provide details for both natural gas operations and fuel oil operations.  Please identify the models used to project the noise levels during each such phase of operations (a) through (e).

RESPONSE:

 

As indicated in Section 6.9 of Invenergy’s EFSB application and on page 28 of Appendix E a three-dimensional, computer-generated acoustical model of operations activities was developed using SoundPLAN® 7.3/7.4 and industry-standard prediction methods to estimate noise levels at nearby receivers.  Noise levels during CREC operations are outlined in the attached report and summarized below:

 

  1. The expected noise levels that will be generated during normal operations, 43 dBA
  2. Startup operations, 46 dBA
  3. Normal shut down operations, 45 dBA
  4. Steam releases,  49 dBA
  5. Emergency shut down operations, 50 dBA

 

The noise levels for fuel oil operations are expected to be identical to the noise produced during natural gas operations since fuel oil operations would require the oil pumps and associated water injection pumps to operate in lieu of the gas compressor and all of these pumps are located indoors

 

RESPONDENT:

 

Mike Hankard, Senior Acoustical Consultant, Michael Theriault Acoustics, Inc. and John Niland, Director, Business Development, Invenergy

 

DATE:

March 31, 2016