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
pre-vs-post controlled across multiple storms; avg reduction 34%
40%
✓Water Quality
TSS removal 80% (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 event | Pre-dev (L/s) | Post-dev (L/s) | Δ |
|---|
| 2-yr | 105.2 | 94.1 | −11% |
| 5-yr | 141.4 | 108.3 | −23% |
| 10-yr | 174.1 | 121.2 | −30% |
| 25-yr | 220 | 131.4 | −40% |
| 50-yr | 267.9 | 140.5 | −48% |
| 100-yr | 308.8 | 149.9 | −51% |
Stormwater controls (1)
Underground storageUnderground SWM Storage Tank
Storage volume345.0 m³
Treatment volume46.3 m³
Outletorifice
Outlet invert115.96 m
Located in underground parking level. Serves Catchments 201 and 202. Orifice diameter 100mm at MH1 with orifice coefficient 0.80, headwater elevation 119.60m, release rate 52.7 L/s. Dead storage of 46.3 m3 below outlet invert for water balance. Water in dead storage can be reused as grey water or for irrigation.
Best management practices (5)
Underground stormwater storage tankDead storage for water balance/grey water reuseLight duty silt fencingRock mud matCatchbasin sediment control devices
Site characteristics & report metadata
Project1995 Dundas Street East Mixed-Use Development
Project typeRedevelopment
DeveloperLandeal Asset Management Inc.
Existing land usecommercial plaza and paved parking lot
Proposed land usemixed-use residential and retail
Site area1.18 ha
Impervious97% (pre) → 73% (post)
Water balance capture5.0 mm
TSS removal target80%
Allowable release rate52.7 L/s
Quality control methodNo active quality control measures provided; roof drainage and landscaped areas deemed to produce clean runoff; uncontrolled catchments consist primarily of landscaped areas with clean runoff
Extraction audit
Confidence: high
Completeness: 100%
Source: 53-page PDF
Extractor: PARCELFLOW v1
Validation: passed
Source PDF: Functional-Servicing-and-Stormwater-Management-Report-OZ-OPA-25-5-W3-and-21T-M-25-1-W3-February-2025.pdf (53 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.