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EPA's Vessel General Permit and Small Vessel General

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Table 27. Estimated Receiving Water Concentrations Resulting from <strong>Vessel</strong> Discharge Pollutant Loadings Under River<br />

Mixing Conditions.<br />

Pre VGP <strong>and</strong> sVGP Receiving Post VGP <strong>and</strong> sVGP Receiving Percent Reduction<br />

Polutant<br />

Water<br />

Water<br />

Average Scenario Loading<br />

Class Analyte Units Average (range)<br />

Average (range)<br />

(worst-best case scenarios)<br />

Classicals Biochemical Oxygen<br />

Dem<strong>and</strong> (BOD)<br />

μg/L 4.38 (0.0506-9.2) 4.17 (0.0459-9.11) 5% (1%-9%)<br />

Classicals Hexane Extractable<br />

Material (HEM)<br />

μg/L 0.396 (0.00445-0.855) 0.149 (0.00173-0.311) 62% (61%-64%)<br />

Classicals Silica Gel Treated<br />

HEM (SGT-HEM)<br />

μg/L 0.102 (0.00117-0.214) 0.041 (0.00049-0.0837) 60% (58%-61%)<br />

Classicals Total Residual<br />

Chlorine<br />

μg/L 0.00152 (0.0000169-0.00328) 0.00139 (0.0000144-0.00319) 9% (3%-15%)<br />

Classicals Total Suspended Solids μg/L 1.1 (0.0126-2.33)<br />

(TSS)<br />

0.72 (0.00764-1.62) 35% (30%-39%)<br />

Metals Aluminum, Total μg/L 0.015 (0.000162-0.0334) 0.0119 (0.000102-0.0309) 21% (7%-37%)<br />

Metals Arsenic, Dissolved μg/L 0.0413 (0-0.164) 0.0413 (0-0.164) no change<br />

Metals Arsenic, Total μg/L 0.0413 (0.000000231-0.164) 0.0413 (0.000000231-0.164) no change<br />

Metals Cadmium, Dissolved μg/L 0.0000059 (0.0000000653-<br />

0.0000129)<br />

0.00000446 (0.0000000366-<br />

0.0000118)<br />

24% (9%-44%)<br />

Metals Chromium, Dissolved μg/L 0.0000158 (0.000000142-<br />

0.0000399)<br />

0.0000141 (0.000000137-<br />

0.0000338)<br />

11% (4%-15%)<br />

Metals Copper, Dissolved μg/L 0.047 (0.000136-0.164) 0.037229 (0.000106-0.131) 21% (20%-22%)<br />

Metals Lead, Dissolved μg/L 0.0000416 (0.00000045-<br />

0.0000922)<br />

0.0000362 (0.000000345-<br />

0.0000878)<br />

13% (5%-23%)<br />

Metals Nickel, Dissolved μg/L 0.0062 (0.000000338-0.0246) 0.0062 (0.000000334-0.0246) minimal change

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