Section 93.8b. Metals criteria

Dissolved criteria are footnoted in Table 5, and have been developed by applying the most current EPA conversion factors to the total recoverable criteria. The EPA factors are listed in the following Conversion Factors Table.

Conversion Factors Table

	Chronic	Acute	Source
Arsenic	1.000 (As3+)	1.000 (As3+)	1,2
Cadmium	1.101672- (ln[H] x 0.041838)	1.136672- (ln[H] x 0.041838)	2
Chromium III	0.860	0.316	1,2
Chromium VI	0.962	0.982	1,2
Copper	0.960	0.960	1,2
Lead*		1.46203- (ln[H] x 0.145712)	2
Mercury	0.85	0.85	1,2
Nickel	0.997	0.998	1,2
Selenium	0.922	0.922	1
Silver	N/A	0.85	2
Zinc	0.986	0.978	1,2

* Conversion factor applies to both acute and chronic criteria.

Source 1—Final Water Quality Guidance for the Great Lakes System (60 FR 15366, March 23, 1995)

Source 2—Establishment of Numeric Criteria for Priority Pollutants; Revision of Metals Criteria—Interim Final Rule (60 FR 22229, May 4, 1995)

The provisions of this § 93.8b adopted May 15, 2009, effective May 16, 2009, 39 Pa.B. 2523; amended July 19, 2013, effective July 20, 2013, 43 Pa.B. 4080. Immediately preceding text appears at serial pages (343957) to (343958).

Notation

Authority

The provisions of this § 93.8b amended under sections 5(b)(1) and 402 of The Clean Streams Law (35 P. S. § § 691.5(b)(1) and 691.402); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).

Cross References

This section cited at 25 Pa. Code § 16.24 (relating to metals criteria).