The Wise Report
Effective March 22, 2019, the TCEQ PST Program has revised the Plan A Target Concentrations for Leaking Petroleum Storage Tank (LPST) releases. The new Target Concentrations for soil and groundwater reflect the PAH toxicity parameters, as revised by United States Environmental Protection Agency (US EPA) in March 2017 and the chemical/physical factors as posted by the Technical Support Section of the Remediation Division. The seven (7) affected PAH constituents are:
- Benz(a)anthracene
- Benzo(a)pyrene
- Benzo(b)fluoranthene
- Benzo(k)-fluoranthene
- Chrysene
- Dibenz(a,h)anthracene
- Indeno-1,2,3-cd-pyrene
The revised Plan A Target Concentrations apply target risk goals as established in the PST rules (Chapter 334, Subchapter G, Section 203.(1) (I) and (J)) and the methodologies developed in the regulatory guidance, Risk-Based Corrective Action for LPST Sites (RG-523/PST-03). All methodologies, default values, and exposure factors used in the equations are supported by ASTM standards (E-1739-95) and US EPA.