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 71%
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 | 57.08 | — | — |
| 5-yr | 76.73 | — | — |
| 10-yr | 94.5 | — | — |
| 25-yr | 119.39 | — | — |
| 50-yr | 145.39 | — | — |
| 100-yr | 167.59 | 48.5 | −71% |
Stormwater controls (4)
Underground storageCupolex Stormwater Tank
Storage volume225.0 m³
Outletorifice
Outlet invert102.96 m
100-yr HGL103.61 m
150mm diameter orifice tube at elevation 102.96m; HWL 103.61m; discharge rate 0.0485 m3/s; required storage 205 m3; provided storage 225 m3; located at cul-de-sac
Oil-grit separatorStormceptor STC-2000
Provides 50% TSS removal; combined with CB shields to achieve >80% TSS removal; sized using PCSWMM for Stormceptor
Rainwater harvesting / reuseRain Barrels
Four rain barrels of 55 gallons (0.21 m3) per lot at each of 19 lots; achieves approximately 3.257mm retention; supplemented by topsoil amendment
OtherCB Shields (Catch Basin Shields)
Provides 50% TSS removal per ETV certification; initial quality control for ROW runoff
Best management practices (6)
Underground storage (Cupolex stormwater tank)Oil Grit Separator (Stormceptor STC-2000)Catch Basin ShieldsRain BarrelsTopsoil AmendmentFlow Restrictor (orifice tube)
Site characteristics & report metadata
ProjectProposed Residential Development at 1583 Cormack Crescent
Project typeRedevelopment
DeveloperELM Cormack (2017) Inc.
Existing land useprivate school
Proposed land usesingle-family residential
Site area0.86 ha
Water balance capture5.0 mm
TSS removal target80%
Allowable release rate57.0 L/s
Quality control methodTreatment train: catch basin shields (50% TSS) + Oil Grit Separator Stormceptor STC-2000 (50% TSS); combined efficiency >80% TSS removal
Extraction audit
Confidence: high
Completeness: 92%
Source: 90-page PDF
Extractor: PARCELFLOW v1
Validation: passed
Source PDF: W1_1583_Functional_Servicing_Report_and_Stormwater_Management_Apr2021.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.