Contact: Maureen Gibson
Phone: (718)-430-4524
Fax: (718)-430-4510
E-Mail: mgibson@industrialacoustics.com
2011 11 April
IAC FS/S Noishield Barrier System Provides a Stepped Design for CP Kelco
 The CP Kelco facility is located in the city of San Diego, California, just adjacent to and underneath the Coronado Bay Bridge. The property is adjacent to a facility owned by Continental Maritime of San Diego, Inc.
The City of San Diego Municipal establishes regulation for intrusive noise as follows “The outdoor noise level for manufacturing all other industrial including agricultural and extractive industry is not to exceed 75dBA anytime of the day”. Initial investigation determined that most of the adjacent Continental Maritime property had noise levels between 80 and 90dBA, the source being the CP Kelco Facility.
The recommendation was to install an IAC FS/S Noishield barrier system 400 feet long and ranging 10 to 32 feet high. IAC‘s barrier system was chosen because the desired Insertion Loss Performance goal of below 75dBA would be met, the absorptive performance would ensure the noise levels experienced on the equipment / operator side of the barrier would not increase, and because the system could be fabricated to span 20 feet between structural supports to reduce the quantity of structural columns and installation cost.
IAC fabricated and installed (263) FS/S Noishield Barrier Panels measuring 24” x 18”H x 238”L x 5” thick in order to provide a stepped design for targeted noise reduction along the property line between CP Kelco and Continental Maritime of San Diego. IAC also designed, fabricated and installed a liftable door measuring 20‘W x 20’H in one of the 32‘high wall sections.
The results after installation were that the A-weighted noise levels between 80 and 90dBA were reduced to 69 to 73dBA. The uniformity of the survey indicated that the stepped design, as well as the overall length and height of the barrier provided a fit-for-purpose solution for reducing the CP Kelco noise emissions with an appropriate safety margin of 2 dB. There were no indications that the new sound wall resulted in any undue increases in noise levels being reflected back to the manufacturing area. Thus, the noise exposure to the CP Kelco workers was consistent with what it was prior to the installation of the barrier.
For further information on IAC’s Noishield Barrier Systems please contact Phil Hooser at 718-430-4703 or email at phooser@industrialacoustics.com.
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