221-225 John Street South & 70-78 Young Street — Parsed SWM Report

Credit scorecard — Hamilton 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.

✓On-site controls

documented source control on the site

50%

—Lake Ontario green-space bonus

direct discharge + green-space parcel flag (90% tier) — not documented

Net credit

50% baseline; up to 90% with Lake Ontario direct-discharge + green-space flag

50%

Pre vs post peak discharge

Storm event	Pre-dev (L/s)	Post-dev (L/s)	Δ
2-yr	92	92	+0%
5-yr	127.9	92	−28%
10-yr	151.8	92	−39%
25-yr	181.4	92	−49%
50-yr	204.4	92	−55%
100-yr	225.7	92	−59%

Stormwater controls (3)

Underground storageSWM Tank

Storage volume106.6 m³

Outletorifice

Stormwater holding tank with flow control device; minimum 106.6 m3 required for 100-year storm; allowable release rate 92.0 L/s (2-year pre-development flow); details to be confirmed at Site Plan Application stage

Oil-grit separatorOil-Grit Separator (OGS)

Required for driveway/parking areas exposed to oil and grit; sizing details to be provided at Site Plan Application stage

Green roofRooftop/Terraces

Building rooftop/terraces provide Level 1 water quality control; green roof areas shown on post-development drainage area plan DAP-2

Best management practices (5)

stormwater holding tankflow control device/orificeroof pondinggreen roof/rooftop terracesoil-grit separator

Site characteristics & report metadata

Project221-225 John Street South & 70-78 Young Street Mixed Use Development

Project typeRedevelopment

DeveloperSlate Asset Management L.P.

Existing land usecommercial/mixed-use with surface parking

Proposed land usemixed-use commercial/residential high-rise

Site area0.59 ha

TSS removal target80%

Allowable release rate92.0 L/s

Quality control methodrooftop/terraces (green roof) for Level 1 quality control plus oil-grit separator for driveway areas

Extraction audit

Confidence: high Completeness: 88% Source: 52-page PDF Extractor: PARCELFLOW v1 Validation: passed

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.