25 Pa. Code § 250.4. Limits related to PQLs.

§ 250.4. Limits related to PQLs.

(a)  The PQLs shall be selected from the PQLs or EQLs specified by the EPA in the most current version of the EPA’s drinking water or solid waste analytical methods.
(b)  For regulated substances when PQLs or EQLs set by the EPA exceed an MCL or HAL or have a health risk that is greater (less protective) than the risk levels set in sections 303(c) and 304(b) and (c) of the act (35 P.S. § §  6026.303(c) and 6026.304(b) and (c)) and for substances when no EQL has been established by the EPA, the PQL shall be established by the methodologies in paragraph (1) or (2).
   (1)  A level set by multiplying 3.18 by the published method detection limit (MDL) of the most recently approved EPA methodology.
   (2)  A level set by multiplying 3.18 by the instrument-specific MDL. If multiple instruments are used, then the PQL is set by averaging the instrument-specific MDLs and multiplying that value by 3.18.
(c)  For regulated substances which have no limits related to PQLs identified in subsection (b)(1) or (2), a person shall demonstrate attainment under the site-specific standard or the background standard.
(d)  When a minimum threshold MSC is used as a Statewide health standard, the minimum threshold MSC is the Statewide health standard regardless of whether it is higher or lower than a quantitation limit established by this section.
(e)  Nothing in this section restricts the selection of valid and generally accepted methods to be used to analyze samples of environmental media.

Authority

   The provisions of this §  250.4 amended under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P.S. § §  6026.104(a) and 6026.303(a)); and section 1920-A of The Administrative Code of 1929 (71 P.S. §  510-20).

Source

   The provisions of this §  250.4 amended November 19, 2021, effective November 20, 2021, 51 Pa.B. 7173. Immediately preceding text appears at serial pages (382749) to (382750).

Cross References

   This section cited in 25 Pa. Code §  250.701 (relating to scope).

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