The discharge & the receiving water
Dilution at the design low flows, and the burden the receiving water already carries.
A real impact study screens the project's discharge against the assimilative capacity of the receiving stream — how much pollutant that stream can take before it breaches a criterion — at the stream's cited design low flows. The design flow matches the criterion type: chronic aquatic-life dilution at the 7Q10, and acute dilution at the 1Q10, which is the sharper single-day design low flow. It also sets that discharge beside what the county's TRI reporters already release. These are screening bands. They are not a permit determination.
The dilution screen · baseline
| Discharge → receiving water | Design 7Q10 | Discharge | Chronic | Credited | Acute (1Q10) | Evidence |
|---|---|---|---|---|---|---|
| Van Wert WWTP→ Town Creek | 0 cfsOhio EPA NPDES fact sheet 2PD00006 (Van Wert WWTP), Table 12 — USGS 04191500 (Auglaize River Near Defiance, 1915-2003) drainage area ratio applied to Town Creek | 6 cfs | 0.03:1 · violation | — | 0.02:1 · violation | [verified] |
1 of 1 receiving reach fails a dilution band at design low flow. The effluent-credited ratio counts the permitted effluent already in the reach (WS-15); a cited 1Q10 of 0 cfs is a stream that runs dry at design low flow — no acute capacity at all.
What the county's TRI reporters already release
| Facility | City | RSEI score |
|---|---|---|
| SONOCO FIBRE DRUM INC | VAN WERT | 399,525.8 |
| KENNEDY MANUFACTURING CO | VAN WERT | 187,217.3 |
| DANFOSS POWER SOLUTIONS - VAN WERT | VAN WERT | 94,075.1 |
| FEDERAL MOGUL CORP | VAN WERT | 3,777.7 |
| KENNEDY MANUFACTURING CO | VAN WERT | 3,736.3 |
Any new discharge lands on top of this baseline — the point of reading the two halves together. The full ranked inventory and its reading caveats are in the RSEI annex.
The record behind this chapter
What this chapter stands on: the records it reads, the inputs its modeled figures rest
on, and the reference data behind its baselines — the same pages the record screens
serve, not a second copy. A figure the record does not support stays [open] and links nothing.
- 2PD00006.fs.pdfOhio EPA
- Van Wert Wastewater Treatment Plant (WWTP)Permits
- QTS Data CenterPermits
- Permits6 records
- Maumee NPDES inventory (EPA ECHO)Reference dataset
- RSEI toxic-release inventory (EPA)Reference dataset