Draft Project Impact Report - Boston Redevelopment Authority

Exeter Residences/888 Boylston
\\Mabos\projects\09916.00\docs\Permits\DPIR\Text\DPIR Chapter 6
Infrastructure.docx
All improvements and connections to BWSC infrastructure will be reviewed by the
BWSC as part of the designated BWSC Site Plan review process. This process
includes a comprehensive design review of the proposed service connections,
assessment of system demands and capacity as well as the establishment of service
accounts. Furthermore, a detailed groundwater monitoring plan, which is an ongoing
program for the Prudential Center, will be continued during and after
construction to ensure groundwater levels will be maintained. Figure 5-41 depicts
the location of existing monitoring wells that will be monitored.
Article 32 - Groundwater Conservation Overlay District
Summary
Section 32-6 of the Boston Zoning Code requires that any Proposed Project promote
infiltration into the ground of a volume of rainwater equivalent to 1-inch across the
area to be occupied by the Project by capturing and infiltrating runoff from building
roof areas within a suitably-designed system for recharge to the groundwater table.
This requirement may be reduced if a Proponent demonstrates that this amount of
recharge cannot feasibly be achieved using techniques and materials appropriate to
the Proposed Project and the lot upon which it is located. In addition, a Proposed
Project cannot result in negative impact on groundwater levels within a lot or
adjacent lots.
The Proponent has coordinated with Boston Groundwater Trust and City agencies to
identify a proposed location in Exeter Street to provide a recharge system which will
positively benefit the groundwater table and locate the recharge toward the Lenox
Hotel and Boston Public Library. Roof runoff from the proposed Exeter Residences
will be directed to this system. Location of a similar system adjacent the 888 Boylston
site is not feasible due to the Prudential Center Garage limits and the Green Line
tunnel located in Boylston Street. However, the volume of rainwater to be recharged
to the Exeter Street location will be equivalent to not less than 1-inch across the area
to be occupied by both the Exeter Residences and 888 Boylston.
The use of subsurface area under the public way is subject to Public Improvement
Commission (PIC) approval, with whom the Proponent will coordinate directly
following the Article 80 process.
The final design process for these Project components will include required
engineering analyses and will adhere to applicable protocols and design standards,
ensuring that the proposed buildings are properly supported by the City’s
infrastructure. Detailed design of the utility systems will proceed in conjunction
with the design of the buildings and interior mechanical systems. Furthermore, the
Proponent will meet the recharge requirements of Article 32 and will continue to
Infrastructure Systems 6-3