Current through Register Vol. 54, No. 49, December 7, 2024
Section 250.202 - Establishing background concentrations(a) Background concentrations shall be established based on a site characterization, as set forth in § 250.204(a)-(e) (relating to final report).(b) The background concentrations shall be established using analysis of samples of regulated substances present at the property but not related to any release at the property. If all areas on the property are affected by a release, background shall be determined at points off the property in accordance with § 250.204(f)(7) and (8).(c) Background concentrations shall be established by a methodology that is statistically valid and consistent with the methodology used to demonstrate attainment under Subchapter G (relating to demonstration of attainment). This section cited in 25 Pa. Code § 271.1 (relating to definitions); and 25 Pa. Code § 287.1 (relating to definitions).