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 40%
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 | 23.5 | 11.3 | −52% |
| 5-yr | 31.6 | 13.9 | −56% |
| 10-yr | 38.9 | 24.6 | −37% |
| 25-yr | 44.7 | 29.7 | −34% |
| 50-yr | 49.9 | 33.9 | −32% |
| 100-yr | 55.3 | 37.7 | −32% |
Stormwater controls (4)
Underground storageUnderground Storage Tank
Storage volume84.3 m³
Outletorifice
130mm diameter orifice plate; max release rate 34.0 L/s; footprint area 100.6 m2; receives runoff from green roof, rooftops/terraces/landscape/hardscape, and driveway areas
InfiltrationInfiltration Trench
Storage volume3.1 m³
Treatment volume3.1 m³
Outletother
Outlet invert84.10 m
Footprint area 11.00 m2, height 0.70 m, bottom elevation 84.10 masl; receives runoff from building rooftops; sized for 5mm onsite runoff retention; infiltrates 3.08 m3 within 72 hours
Green roofGreen Roof
Drainage Area A1, 0.060 ha, C=0.45; controlled in underground storage tank
Oil-grit separatorStormwater Quality Control Device (OGS)
Provided for driveway areas exposed to oil and grit; achieves minimum 80% TSS removal; specifications to be provided at SPA stage
Best management practices (4)
Underground Storage TankInfiltration TrenchGreen RoofOil-Grit Separator (OGS)
Site characteristics & report metadata
Project900 Lakeshore Road West
Project typeRedevelopment
Developer1000570027 Ontario Inc.
Existing land useresidential
Proposed land useresidential
Site area0.34 ha
Water balance capture5.0 mm
TSS removal target80%
Allowable release rate34.0 L/s
Quality control methodgreen roof inherent TSS removal + oil-grit separator for driveway areas
Extraction audit
Confidence: high
Completeness: 83%
Source: 90-page PDF
Extractor: PARCELFLOW v1
Validation: passed
Source PDF: Functional-Servicing-and-Stormwater-Management-Report-OZ-OPA-25-8-W2-March-2026.pdf (90 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.