2019.06.14 DRE Memo
570 Taxter Road, Suite 300
Elmsford, NY 10523
914-631-8600 phone
914-631-5769 fax
www.drepc.com
www.aiengineers.com
Dolph Rotfeld Engineering,
Division of AI Engineers, Inc., P.C.
An Company
TO: Paul S. Rosenberg, Mayor, and the
Village of Rye Brook Board of Trustees
FROM: Anthony Oliveri, P.E.
SUBJECT: 900 King Street Redevelopment
preliminary Final Environmental Impact Statement (pFEIS)
PUD Concept Plan and Preliminary Site Plan
DATE: June 14, 2019
With regard to the above mentioned project, this office has received and reviewed the
following:
1. 900 King Street Redevelopment, preliminary Final Environmental Impact Statement
(pFEIS), and appendices dated May 14, 2019 and prepared by AKRF, Inc.
2. Plan entitled: "PUD Concept Plan and Preliminary Site Plans, 900 King Street
Redevelopment", prepared by JMC, last dated May 14, 2019;
Our comments are as follow:
1.) As required Suez has conducted an analysis of the available water system capacities
including maximum day and peak hour demands and fire flow demands. The system
was found to have inadequate capacity without key “operational” changes implemented.
The changes include bypassing of the Anderson Hill Road meter vault and an increase
to PRV operating pressure to 55 psi at King Street. As part of this the meter and vault at
Anderson Hill road will be required to be upgraded from an 8” to a 16” meter. This
upgrade cost is to be paid by the applicant. These changes were shown to produce
pressures above the minimum service standards. SUEZ has provided a "willingness to
serve" letter, contingent on the above changes and proposed water main extension
associated with the project to be completed within 9 months of the letter dated February
1, 2019. If not completed a new “willingness to serve” letter will need to be requested.
Therefore, it is critical that the changes to the Suez system be made conditional to any
approvals and the proper means to enforce these conditions and substantiate their
implementation be considered.
2.) The applicant has adjusted expected sewage flows from the project in accordance with
the reductions proposed. As a result, the net increase to sewage flows is now calculated
at 26,877 gpd. As previously noted, it is necessary to provide mitigation in the form of
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Inflow and Infiltration (I&I) removal at a three for one ratio, this will result in required I&I
removal of 80,631 gpd. The pFEIS states that the applicant proposes to meet this by
monetary contribution to the Village’s existing I&I program. This monetary amount
should be established by the applicant in conjunction with the Village and its
consultant’s prior to final approval and noted in the FEIS. This is in accordance with the
Westchester County Departments of Planning and Environmental Facilities
recommendations and should be made a condition of any future site plan approval.
3.) Construction phasing and associate staged disturbance areas have been reduced and
further sequenced; however, still requiring a NYSDEC waiver for disturbance areas in
excess of 5 acres at one time. It should also be noted that the phasing and sequencing
will need to be further revised to reflect the pending demolition segmentation of the
project that is currently under consideration. A final review of the construction phases
will be conducted once the segmentation issue is memorialized.
4.) Sanitary sewer services seem to be omitted from the site plan.
5.) Some pipe and slope information seem to be omitted from the sanitary sewer profiles.
An effort should be made to increase what is now proposed as minimum slope for an 8”
sewer main (0.41%) in some reaches.
6.) Technical comments from our memo of November 2, 2019 have been substantially
addressed at this time, however we note that a review of the Final Site Plan and
Stormwater Pollution and Prevention Plan will be conducted at the time of a Site Plan
submission application for this project.
We would be happy to continue our review once additional information is received.
Thank You
C: M. Nowak
M. Mohamed
J. Gray
C. Bradbury
M. Izzo