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§ 131.47 Aquatic life criteria for aluminum in Oregon.
(a) Scope. This section promulgates aquatic life criteria for aluminum in fresh waters in Oregon that are jurisdictional under the Clean Water Act.
(b) Criteria for aluminum in Oregon. The aquatic life criteria in Table 1 to this paragraph (b) apply to all fresh waters in Oregon that are jurisdictional under the Clean Water Act to protect the fish and aquatic life designated uses.
Table 1 to Paragraph (b)—Aluminum Aquatic Life Criteria for Oregon Fresh Waters
| Metal | CAS No. | Criterion maximum concentration (CMC) 3 (µg/L) | Criterion continuous concentration (CCC) 4 (µg/L) |
|---|---|---|---|
| Aluminum 1 2 | 7429905 | Acute (CMC) and chronic (CCC) freshwater aluminum criteria values for a site shall be calculated using the 2018 Aluminum Criteria Calculator (Aluminum Criteria Calculator V.2.0.xlsx), or a calculator in R or other software package using the same 1985 Guidelines calculation approach and underlying model equations as in the Aluminum Criteria Calculator V.2.0.xlsx, as defined in EPA's Final Aquatic Life Ambient Water Quality Criteria for Aluminum. 5 | |