HomeMy WebLinkAboutSP-22-031 - Supplemental - 1068 Williston Road (13)
Engineers Scientists Planners Designers
40 IDX Drive, Building 100 Suite 200, South Burlington, VT 05403
P 802.497.6100 www.vhb.com
May 18, 2022
Ref: 57913.01
Marla Keene, PE
Development Review Planner
City of South Burlington
180 Market Street
South Burlington, VT 05403
Re: Holiday Inn Redevelopment
1068 Williston Road, South Burlington
Water/Wastewater Design Flow Calculations
Dear Marla,
The previously permitted Holiday Inn Redevelopment Project (“Project”), which consisted of the renovation of the
existing Holiday Inn building and a new Hampton Inn building, has since undergone design changes which have
resulted in a partial change in use. These changes include modifications to the Multi-Use building on the Project
parcel which have resulted in changes to the water and wastewater design flows for the Project, as summarized
below.
Wastewater Demand
The newly proposed wastewater design flows for the proposed updates for the Multi-Use Building are calculated
below, followed by a table summarizing the previously permitted flows and proposed flows:
Table 1 Proposed Wastewater Design Flow Calculations Multi-Use Building
Use Quantity Unit GPD/Unit Wastewater Design Flow (GPD)
Residential Use
-Studio/One Bedroom Units** › 72 Living Unit 140 10,080
-Two Bedroom Units › 11 Living Unit 210 2,310
Store › 5,756 Per 100 SF 4 230 ›
Total 12,620
*Based on the State Environmental Protection Rules, Chapter 1, Subchapter 8, Table 8-1 and Table 8-3
**Based on design flow of 70 gallons per day per person at the max. residential occupancy proposed for each living unit
Table 2 Project Wastewater Design Flow Summary
Building Previously Permitted Flow (GPD)
Change (GPD) Proposed Flow (GPD)
Development Review Planner
Ref: 57913.01
May 18, 2022
Page 2
Holiday Inn › 18,840 0 18,840
Hampton Inn › 24,235 0 24,235
Mixed-Use › 11,657 +963 12,620
Total › 54,732 +963 55,695
The previously permitted wastewater demand for this parcel based on tabulated-unitized flows from proposed uses
is 54,732 GPD. The proposed wastewater demands for this parcel are 18,840 GPD for the Holiday Inn building,
24,235 GPD for the Hampton Inn building, and 12,620 GPD for the Multi-Use building for a total combined demand
of 55,695 GPD. This represents an increase of 963 GPD.
Water Demand
The newly proposed water design flows for the proposed renovation of the existing Holiday Inn building and the
Mixed-Use Building are calculated below, followed by a table summarizing the previously permitted flows and
proposed flows:
Table 3 Proposed Water Design Flow Calculations* Mixed-Use Building
Use Quantity Unit GPD/Unit Wastewater Design Flow (GPD)
Residential Use
-Studio/One Bedroom Units** › 72 Living Unit 140 10,080
-Two Bedroom Units › 11 Living Unit 280 3,080
Store › 5,756 Per 100 SF 4 230
›
Total 13,390
*Based on the State Environmental Protection Rules, Chapter 1, Subchapter 8, Table 8-1 and Table 8-3
**Based on design flow of 70 gallons per day per person at the max. residential occupancy proposed for each living unit
Table 4 Project Water Design Flow Summary
Building Previously Permitted Flow (GPD)
Change (GPD) Proposed Flow (GPD)
Holiday Inn › 18,840 0 18,840
Hampton Inn › 24,235 0 24,235
Mixed-Use › 13,266 +124 13,390
Total › 56,341 +124 56,465
Development Review Planner
Ref: 57913.01
May 18, 2022
Page 3
The previously permitted water demand for this parcel based on tabulated-unitized flows from proposed uses is
56,341 GPD. The proposed water demands for this parcel are 18,840 GPD for the Holiday Inn building, 24,235 GPD
for the Hampton Inn building, and 13,390 GPD for the Multi Use building for a total combined demand of 56,465
GPD. This represents an increase of 124 GPD.
Please let me know if you have any questions or need additional information.
Sincerely,
VHB
Stephanie Wyman, PE
Civil Engineer
cc: