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Mill Building Design Flow
' • Mill Storage=(estimated 75 persons)(25 GPD per person)=1,875 GPD
• Average Flow Rate(AFR)at 9 hours of operation=
' (1,875 GPD/9)(1 HR/60 MIN)=3.5 GPM
• Peak Flow Rate(PFR)=4 x AFR=13.9 GPM
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Total Design Flow
• Studio=(4 buildings)(59.2 GPM)=236.8 GPM
' • Mill=13.9 GPM
• Total Peak=236.8+13.9=250.7 GPM
Future Development Sewer Design
' VHB reviewed the allowable uses for the remaining developable area in conformance
with zoning to evaluate potential uses and estimated sewer flow. Based on this
analysis,VHB estimates that the development of this parcel could generate an
average daily flow between 100,000 GPD to 150,000 GPD,or 833.3 GPM with a
peaking factor of 4 occurring over 12 hours. Combined with the above-calculated
250.7 GPM for the Connecticut Studios,total future peak is estimated at 1,084 GPM.
' Analysis
' VHB conducted an analysis of the proposed sewer system main into Chapel Road to
confirm that it has adequate capacity to support the Connecticut Studios Project.
Additionally,VHB conducted an analysis of this system to calculate self-cleansing
velocities. Appendix A provides supporting calculations for the sewer main and
sewer laterals design.
' Conclusion
In accordance with a recommendation from Fred Shaw,Superintendent Pollution
' Control for the Town of South Windsor,VHB has designed the sewer main as a 12-
' Suppl Alyro2169721&9.MwoRelTechnzal Sewer Calculations
Suppkmentl72189 Sew_r Memo.tlacx