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 1%
40%
✓Water Quality
TSS removal 88% (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 | 6.8 | 6.7 | −1% |
| 5-yr | 9.2 | 9.11 | −1% |
| 10-yr | 11.3 | 11.24 | −1% |
| 25-yr | 14.3 | 14.1 | −1% |
| 50-yr | 17.4 | 17.04 | −2% |
| 100-yr | 20.1 | 19.92 | −1% |
Stormwater controls (2)
Underground storageGreenStorm System
Storage volume64.9 m³
Treatment volume47.7 m³
Outletorifice
Outlet invert153.41 m
GreenStorm stormwater chamber system. Total storage 64.88m3, active storage above invert 153.98m is 47.68m3, dead storage below invert 153.98m is 17.20m3. Controlled via 75mm orifice tube upstream of STM Control MH. System area 25.60m2, void ratio 0.96. Also provides 17.2m3 water retention for water balance/infiltration.
Oil-grit separatorStormceptor EFO4
Located at downstream STM MH 103. Provides 91% TSS removal for controlled impervious area. Sized for 0.164 ha drainage area, 84% imperviousness, fine PSD, 80% TSS target.
Best management practices (4)
GreenStorm underground stormwater chamberStormceptor EFO4 oil-grit separatorEnhanced landscaping with 300mm absorbent soilPermeable precast concrete unit pavers
Site characteristics & report metadata
ProjectProposed 10 Units Townhouse Development at 86 Thomas Street
Project typeRedevelopment
DeveloperRexton Development
Existing land useresidential
Proposed land usestacked townhouse residential
Site area0.16 ha
Water balance capture5.0 mm
TSS removal target88%
Allowable release rate20.1 L/s
Quality control methodoil-grit separator (Stormceptor EFO4) plus enhanced landscaping with absorbent soil
Extraction audit
Confidence: high
Completeness: 92%
Source: 45-page PDF
Extractor: PARCELFLOW v1
Validation: passed
Source PDF: Functional-Servicing-Report-%E2%80%93-September-2021.pdf (45 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.