§ 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 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 NA 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)

Source

   The provisions of this §  93.8b adopted May 15, 2009, effective May 16, 2009, 39 Pa.B. 2523.

Cross References

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


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