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 2%
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
combinable O&A sub-credits — not documented
0%
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 | 137.8 | 137.8 | +0% |
| 5-yr | 185.3 | 185.3 | +0% |
| 10-yr | 228.2 | 215.2 | −6% |
| 25-yr | — | 221 | — |
| 50-yr | — | 224.7 | — |
| 100-yr | — | 228.2 | — |
Stormwater controls (4)
Underground storageUnderground Stormwater Detention Tank
Storage volume278.5 m³
Outletorifice
Outlet invert165.07 m
100-yr HGL166.37 m
250mm diameter orifice tube located downstream of tank; located within underground parking garage; 2-year water level at 165.68m; 100-year water level at 166.37m; ground elevation 167.38m
Rainwater harvesting / reuseWater Re-use Tank
Storage volume49.2 m³
Treatment volume33.9 m³
Located in underground parking garage; provides erosion/volume control for first 5mm of runoff from impervious surfaces; used for irrigation/rainwater re-use; required volume 33.9 m3, provided 49.2 m3
Oil-grit separatorHydroFilter HF13 (MTD)
ETV certified Manufactured Treatment Device (MTD); HydroFilter HF13; sized for MECP Enhanced (Level 1) Protection; 80% TSS removal target; drainage area 1.59 ha; imperviousness 58%; treats 90% of annual runoff; achieves 84% annual TSS removal per Hydroworks sizing program; Toronto Central rainfall records used
SwaleGrassed Swales
Conveyance control; promotes infiltration, filtration, and evapotranspiration; contributes to water quality and quantity control and groundwater recharge
Best management practices (6)
Increased Topsoil DepthPassive LandscapingGrassed SwalesUnderground Stormwater Detention SystemManufactured Treatment Device (HydroFilter HF13)Water Re-use Tank
Site characteristics & report metadata
Project2555 Erin Centre Boulevard Mixed Use Condominium Development
Project typeRedevelopment
DeveloperStarmont Estates Inc.
Existing land usewood park, private urban plaza, residential homes
Proposed land usemixed-use condominium with retail at grade and underground parking
Site area1.01 ha
Water balance capture5.0 mm
TSS removal target80%
Allowable release rate228.8 L/s
Quality control methodTreatment train: increased topsoil depth + passive landscaping (at-source) + grassed swales (conveyance) + HydroFilter HF13 Manufactured Treatment Device (end-of-pipe)
Extraction audit
Confidence: high
Completeness: 92%
Source: 137-page PDF
Extractor: PARCELFLOW v1
Validation: passed
Source PDF: Functional-Servicing-and-Stormwater-Management-Report-OZ-OPA-25-6-W11-February-2025.pdf (137 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.