Appendix
Appendix C: Sanitary Flow Estimate
June 13, 2023Pages 135–1361 section
A worksheet estimating the peak sanitary sewage flow based on the planned residential unit count and equivalent population.
Total units = 259Estimated population = 650 capitaEstimated Total Peak Sanitary Flow = 7.21 L/s
APPENDIX C: SANITARY FLOW ESTIMATE
Estimated Sanitary Flow
| Project: | 339 Island Highway |
| Date: | 23-Feb-23 |
| Client: | Boardwalk REIT |
| McElhanney File #: | 22-149 (4) |
| Estimated Sanitary flow | |
|---|---|
| Total units* | 259 |
| TOTAL RESIDENTIAL UNITS | 259 |
| Persons per unit** | 2.51 Estimated |
| Equivalent Population | 650 capita |
| Per Capita Flow Rate*** | 240 L/capita/day |
| Total Average flow = | 156,024 L/day |
| 1.806 L/s | |
| Peaking Factor | |
| -Harmon | 3.91 |
| Estimated Peak Flow = | 7.07 L/s |
| Site Area = | 12,220 sq.m. |
| Approx. Hard Surface building area = | 0 sq.m. |
| Approx. area for infiltration (allows for infiltration over entire site) = | 12,220 |
| Inflow and Infiltration (0.12 L/s/ha)**** | 0.147 L/s |
| Estimated Total Peak Sanitary Flow = Estimated Peak Flow + Inflow and Infiltration | 7.21 L/s |
*based on drawings provided by De Hoog & Kierulf Architects Inc. **based on Ministry of Health Sewerage System Standard Practice Manual, Table II-9 (Multi-family apartment) ***based on MMCD Design Guideline Manual 2014 (Section 3.2 Per Capita Flow, dry weather) ****based on MMCD Design Guideline Manual 2014 (Section 3.5 Infiltration - used old system requirement to provide factor of safety)
People per unit calculation
| Units | Cap/unit | Capita | |
|---|---|---|---|
| Number of 4 bedroom units | 4.5 | 0 | |
| Number of 3 bedroom units | 5 | 3.75 | 18.75 |
| Number of 2 bedroom units | 130 | 3 | 390 |
| Number of 1 bedroom units | 117 | 2 | 234 |
| Number of studio units | 7 | 1 | 7 |
| TOTAL | 259 | 649.75 |
Therefore, Persons per unit = total capita/total units = 2.51
Page 135–136
Extracted from: 2023 06 13 Committee of the Whole Agenda - Agenda - Pdf