Appendix
Attachment 8: Appendix A - Sewer Calculations
December 12, 2023Pages 276–2781 section
Technical calculations for the proposed sanitary flow for the Pebbles development, including handwritten engineering notes.
Design basis: 2.8 people per unitTotal units: 20Total calculated flow: 0.53 L/s
Appendix A - Sewer Calculations
Pebbles – Proposed Sanitary Flow Calculations
J.E. Anderson & Associates
Date: 2023/11/22
Project No: 33862
Prepared By: CK
- 2.8 CAP/UNIT (CRD ENGINEERING SPECS – MEDIUM DENSITY)
- 240 L/CAP/DAY (MMCD – ADWF FOR METERED SYSTEM)
- 20 UNITS PROPOSED
- SITE AREA = 2470 m² = 0.247 ha
- i = 0.12 L/s/ha (MMCD – OLD SYSTEM ≥ 25 YRS)
$Q_{SEWAGE}$ = CAPITA × ADDF × PEAKING FACTOR + I & I
CAPITA = 20 UNITS × 2.8 CAP/UNIT = 56 CAP = P
PEAKING FACTOR = PF = $3.2 / P^{0.105} = 3.2 / (1)^{0.105} = 3.2$
I & I = 0.247 ha × 0.12 L/s/ha = 0.03 L/s = 2561 L/DAY
$Q_{SEWAGE} = 56 \times 240 \times 3.2 + 2561$ $= 45,569 \text{ L/DAY}$ $= 0.53 \text{ L/s}$
Page 276–278
Extracted from: 2023 12 12 Committee of the Whole Agenda - Agenda - Pdf