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 8%
40%
✓Water Quality
TSS removal 80% (enhanced)
30%
✓Runoff Volume
water balance retains 6 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 | 881.1 | 845.5 | −4% |
| 5-yr | 1,184.4 | 1,117.6 | −6% |
| 10-yr | 1,458.8 | 1,376.5 | −6% |
| 25-yr | 1,675.5 | 1,522.3 | −9% |
| 50-yr | 1,872.2 | 1,654.6 | −12% |
| 100-yr | 2,076.2 | 1,791.6 | −14% |
Stormwater controls (11)
Underground storageSWM Detention Tank - Building 1A
Storage volume219.4 m³
Outletorifice
Allowable release rate 8.5 L/s (stormwater) + 1.4 L/s foundation drainage = 9.9 L/s total; located in basement of Building 1A
Underground storageSWM Detention Tank - Building 1B
Storage volume161.5 m³
Outletorifice
Allowable release rate 4.0 L/s (stormwater) + 1.0 L/s foundation drainage = 5.0 L/s total; located in basement of Building 1B
Underground storageSWM Detention Tank - Building 2A
Storage volume54.2 m³
Outletorifice
Allowable release rate 46.1 L/s (stormwater) + 0.9 L/s foundation drainage = 47.1 L/s total; located in basement of Building 2A
Underground storageSWM Detention Tank - Building 2B
Storage volume50.5 m³
Outletorifice
Allowable release rate 42.9 L/s (stormwater) + 0.9 L/s foundation drainage = 43.8 L/s total; located in basement of Building 2B
Underground storageSWM Detention Tank - Building 3A
Storage volume82.2 m³
Outletorifice
Allowable release rate 70.0 L/s (stormwater) + 1.4 L/s foundation drainage = 71.4 L/s total; located in basement of Building 3A
Underground storageSWM Detention Tank - Building 3B
Storage volume76.6 m³
Outletorifice
Allowable release rate 65.2 L/s (stormwater) + 1.3 L/s foundation drainage = 66.5 L/s total; located in basement of Building 3B
Underground storageSWM Detention Tank - Building 3C/D
Storage volume121.5 m³
Outletorifice
Allowable release rate 103.4 L/s (stormwater) + 2.1 L/s foundation drainage = 105.5 L/s total; located in basement of Building 3C/D
Underground storageSWM Detention Tank - Building 4
Storage volume52.3 m³
Outletorifice
Allowable release rate 44.5 L/s (stormwater) + 0.9 L/s foundation drainage = 45.4 L/s total; located in basement of Building 4
Oil-grit separatorPublic OGS - Street A downstream connection
Located at downstream end of new storm sewer network within Streets A, B and C prior to connection to existing 975mm sewer in Crumbie Street
InfiltrationPark Infiltration Basin
Provided in Park catchment to meet 5mm water balance requirement for park block
Rainwater harvesting / reuseRainwater Harvesting/Re-use - Private Blocks
Capture depth of 6.08mm per private block for irrigation of landscape/green-roofs or toilet flushing; integrated with SWM detention tanks
Best management practices (10)
Underground SWM detention tank/cisternOrifice flow controlOil-grit separator (OGS)Catchbasin shields (CB Shields)Litta TrapsRainwater harvesting and re-useInfiltration basin (park block)Initial abstractionGreen roof irrigation re-useToilet flushing re-use
Site characteristics & report metadata
ProjectCentre Plaza Condominium Development
Project typeRedevelopment
DeveloperDeZen Realty Company Ltd.
Existing land usecommercial and residential
Proposed land usemixed-use condominium (residential and commercial)
Site area4.24 ha
Water balance capture6.1 mm
TSS removal target80%
Allowable release rate687.6 L/s
Quality control methodparticle settling in SWM storage tanks/cisterns in each private block, private oil-grit separator units (if required at Site Plan stage), public OGS unit within Street A at downstream connection to Crumbie Street, and at-source CB Shields or Litta Traps within ROW catchbasins
Extraction audit
Confidence: high
Completeness: 83%
Source: 83-page PDF
Extractor: PARCELFLOW v1
Validation: passed
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.