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
only some design storms documented
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 (m3/s) | Post-dev (m3/s) | Δ |
|---|
| 2-yr | 0.015 | — | — |
| 100-yr | 0.034 | 0.006 | −82% |
Stormwater controls (3)
Underground storageUnderground Storm Tank with Vortex Valve CEV 350 ø95
Storage volume122.2 m³
Treatment volume98.6 m³
Outletorifice
Outlet invert115.21 m
100-yr HGL117.02 m
Tank internal footprint 67.5m2, internal height 1.789m, total active storage 122.18m3, dead storage 23.62m3 for cistern/retention. Vortex valve CEV 350 ø95 controls discharge to allowable 0.006 m3/s. Active storage required 115.48m3.
Oil-grit separatorStormceptor EFO4 (OGS Unit MH1)
Stormceptor EFO4 sized for catchment 201 (0.24 ha, 91% impervious). Particle distribution: CA ETV. Estimated net annual TSS load reduction 63%. Water quality flow rate 6.31 L/s. Located at downstream end prior to connection to 1800mm Hurontario St. storm sewer.
Rainwater harvesting / reuseStormwater Retention (Dead Storage Cistern)
Storage volume23.6 m³
Outletother
Dead storage below vortex valve invert (115.21m) provides 23.62m3 retention volume. Required retention volume is 12.5m3 (5mm over 2500m2). Reuse for irrigation and/or toilet flushing proposed.
Best management practices (6)
Underground storm tank with vortex valveStormceptor EFO4 oil-grit separatorStormwater harvesting/reuse (dead storage cistern)Silt control fencingCatch basin filter fabric/silt sacksMud mat at site exit
Site characteristics & report metadata
Project3115 Hurontario Street Development Civil Works
Project typeRedevelopment
DeveloperClearbrook Development Ltd.
PermitOZ/OPA 22-24 W7
Existing land usecommercial (asphalt driveway, landscaped areas, two-storey building)
Proposed land usemixed-use residential/commercial (39-storey building with underground parking)
Site area0.25 ha
Impervious16% (pre) → 91% (post)
Water balance capture5.0 mm
TSS removal target80%
Allowable release rate6.0 L/s
Quality control methodoil-grit separator (Stormceptor EFO4) with inherently clean roof, landscape and walkway surfaces providing weighted TSS removal
Extraction audit
Confidence: high
Completeness: 100%
Source: 50-page PDF
Extractor: PARCELFLOW v1
Validation: passed
Source PDF: Functional-Servicing-and-Stormwater-Management-Report-z-opa-22-24-w7-august-2025.pdf (50 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.