Parsed SWM report

900-904 Mississauga Heights Drive

Proposed Residential Common Element Development – 900-904 Mississauga Heights Drive · Subdivision · 2023-04-19

Consultant: SKIRA & ASSOCIATES LTD. Engineer: Michael Jozwik, P.Eng. P.Eng sealed Model: OTHER
Credit scorecard — Mississauga bylaw

Each category awards a maximum percentage of the annual stormwater charge as credit. Evidence is extracted directly from the source PDF — no manual review.

—Peak Flow
discharge reduction — not documented
0%
✓Water Quality
TSS removal 82% (enhanced)
30%
✓Runoff Volume
water balance retains 5 mm on site (2% per mm, max 30% at 15 mm)
30%
✓Operations
BMPs + P.Eng present; sub-credit detection pending — full 20% requires explicit O&A items
20%
Net credit
Capped at 50% of annual stormwater charge
50%
Pre vs post peak discharge
Storm eventPre-dev (m3/s)Post-dev (m3/s)Δ
100-yr0.16140.1645+2%
Stormwater controls (4)
Underground storageUnderground Storm Sewer System (STMMH 3-5, 7)
Storage volume140.7 m³
Outletorifice
Outlet invert101.87 m

975mm and larger pipes (STMMH 3-4, 4-5, 5-7) plus enlarged manholes provide 140.67m3 storage. Orifice tube 155mm diameter downstream of STMMH 3, discharge rate 0.1645 m3/s. Followed by 200mm outlet pipe.

Oil-grit separatorHydroStorm HS 5 (Hydroworks)
Outletpipe

Treats runoff from asphalt condominium road. Provides 81% annual TSS removal for Toronto Central rainfall records, 20um-2000um particle size. Drainage area 1.05 ha, imperviousness 57.1%, peak flow 0.37 m3/s, 525mm pipe at 1% slope.

InfiltrationPermeable Pavers (Driveways and Condominium Road)
Storage volume45.0 m³
Outletother

1124m2 permeable paver area, 0.1m thickness, 0.40 porosity. Provides 44.96m3 retention for water balance 5mm requirement.

SwaleGrass Swales along Lot Lines
Outletother

Roof discharge directed to grass swales along lot lines for TSS removal.

Best management practices (8)
Permeable Pavers (Driveways)Permeable Condominium RoadGrass SwalesOil/Grit Separator (HydroStorm HS 5)Underground Storm Sewer StorageOrifice ControlPlunge Pool / Armour Stone Wing WallsTemporary Check Dam
Site characteristics & report metadata
ProjectProposed Residential Common Element Development – 900-904 Mississauga Heights Drive
Project typeSubdivision
DeveloperDiamond Developments & Mario Polla
PermitOZ/OPA 22-1 / OZ 21-13 W7
Existing land useresidential (two single-family dwellings)
Proposed land usesingle-family residential (common element condominium)
Site area3.23 ha
Water balance capture5.0 mm
TSS removal target82%
Allowable release rate161.4 L/s
Quality control methodpermeable pavers (driveways and condominium road) + grass swales (roof discharge) + oil/grit separator (HydroStorm HS 5)
Extraction audit
Confidence: high Completeness: 92% Source: 61-page PDF Extractor: PARCELFLOW v1 Validation: passed
Source PDF: OZ-22-1-W7-Functional-Servicing-Report-June-2023.pdf (61 pages) Open source PDF →
Starter package
Download credit application package »
10-page PDF: pre-filled Form 2703, starter P.Eng report skeleton, submission checklist. Engineer reviews, adds site inspection + O&M plan, certifies + submits.
Download PDF »

How to read this page. Every value above was extracted from the source PDF by the PARCELFLOW report parser, which combines a layout-robust template detector with a validated extraction stage tuned to Ontario Functional Servicing and Stormwater Management reports. The four-category scorecard maps the parsed evidence onto Mississauga's credit bylaw. Numbers are estimates — engineering review still required before submitting a formal credit application to the City.