2018_01_15 S_ Malkinson and V_ Wolff CommentsFrom: Stephen Malkinson <stephen@malkinson.org>
Date: January 15, 2018 at 11:16:16 PM EST
To: cbradbury@ryebrook.org, mayor@ryebrook.org, trusteesusanepstein@outlook.com,
d345788@aol.com, klein.jason4@gmail.com, j.rednick@verizon.net
Subject: Concerns over the demolition of existing building @ 900 King Street
Dear Honorable Mayor Rosenberg and Honorable Members of the Board of Trustees:
Both Virginia Harwood Wolff and I live at 213 Treetop Crescent, Rye Brook. Virginia Harwood Wolff is
Licensed Professional Civil Engineer licensed in the state of New York and
offers the following concerns due to demolition of the large multi-story commercial building at
900 King Street within close proximity of the occupied town houses at the Arbors as it relates to
Vibration, Noise and Air Quality.
We ask that the environmental impact analysis includes a a pre-construction survey to provide a
benchmark for establishing potential damage to our properties in the Arbors due to demolition
impact and vibration.
Vibration Monitoring:
During demolition the impact of demolition hammers and heavy duty demolition equipment
could cause disturbance to our adjacent properties. Vibration monitoring using seismographs is
required. The threshold particle velocity needs to be established to minimize cracking of
masonry walls, sidewalks, our swimming pool and drywall partitions. If the particle velocity
exceeds the established maximum, then the demolition process will need to stop and the process
should be modified,
Noise limitations. - Noise Mitigation Program
The ambient noise - decibel level needs to be established. The maximum increase in noise needs
to be established. A Noise Mitigation Program enumerates the allowable decible level for each
type of demolition phase. subsequent to this documentation of such maximum noise, Noise
monitoring is required/ this ensures that the decibel level is as specified in the Noise Mitigation
program. If the monitoring reports a greater noise level, then the demolition process needs to be
modified.
Air Quality
Ambient air at multiple locations though out the Arbors needs to be analyzed prior to start of
demolition. A qualified testing agency should do this testing. At weekly intervals during the
demolition, the air needs to be tested.
The following Reports would be provided and made available to the residents of the Arbors::
Vibration monitoring - continuous during demolitoin
Noise monitoring - continuous during demolition
Air Quality - initial and then Weekly during demolition.
Thank you for your consideration of these concerns noted above.
--
Stephen B. Malkinson and Virginia Harwood Wolff, 213 Treetop Crescent