The Wise Report
Henry M. Wise, P.G.
January 16, 2021
The Texas Commission on Environmental Quality (TCEQ) has updated the Texas Risk Reduction Program (TRRP) Tier 1 Protective Concentration Levels (PCLs). The tables can be accessed at https://www.tceq.texas.gov/remediation/trrp/trrppcls.html.
The 2021 PCL table update has been released as a single Microsoft Excel workbook with each table on a separate worksheet and as a print only PDF file. The Excel file and the PDF file each contain PCL tables 1 through 10 and the supporting tables in the following order:
- Summary of Updates
- Table 1 – Tier 1 Residential Soil PCLs
- Table 2 – Tier 1 Commercial/Industrial Soil PCLs
- Table 3 – Tier 1 Groundwater PCLs, Residential and Commercial/Industrial
- Table 4 – Tier 1 Residential Total Soil Combined PCLs
- Table 5 – Tier 1 Commercial/Industrial Total Soil Combined PCLs
- Table 6 – Tier 1 Individual Residential Soil PCLs
- Table 7 – Tier 1 Individual Commercial/Industrial Soil PCLs
- Table 8 – Tier 1 Individual Residential and Commercial/Industrial Groundwater PCLs
- Table 9 – Individual Risk-Based Exposure Limits (RBELs), Residential
- Table 10 – Individual Risk-Based Exposure Limits (RBELs), Commercial/Industrial
- Toxicity Factors
- Chemical/Physical Properties
- Organic Carbon-Water Partition Coefficient (Koc) Values for Ionizing Organic COCs as a Function of pH
- Gastrointestinal and Dermal Absorption Fractions (ABSGI and ABD.d Values)
- 2011 List of Updates
The PCL tables updated in November 2019 were the most recent tables prior to this release. A guide to the correct interpretation and use of the Tier 1 PCL tables can be accessed at the following link: https://www.tceq.texas.gov/assets/public/comm_exec/pubs/rg/rg-366-trrp-23.pdf
For additional information on the PCL tables, contact Mike Aplin at mike.aplin@tceq.texas.gov
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The Texas Legislature is now in session and bills are being filed and worked on. New information are shown in bold.
HB 632, by Darby, Relating to the establishment of an advisory committee for the TexNet seismic monitoring program. Filed 11/23/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB632
HB 666, by Harris, Companion bills HB 668 (Duplicate) and SB 152 (Identical), Relating to the regulation of groundwater conservation districts. A person with groundwater ownership and rights may petition the district to adopt modify a rule. This bill lists what the petition must contain. Filed 11/30/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB666
HB 668, by Harris, Companion bills HB 666 (Duplicate) and SB 152 (Identical), Relating to the regulation of groundwater conservation districts. A person with groundwater ownership and rights may petition the district to adopt modify a rule. This bill lists what the petition must contain. Filed 11/30/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB668
HB 714, by Reynolds, Relating to the establishment of the Texas Environmental Justice Advisory Council. Filed 12/3/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB7814
HB 858, by Dutton, Relating to the carcinogenic risk level used in the development of certain environmental remediation benchmarks. "The commission shall set each carcinogenic risk level used by the commission in the development of a protective concentration level, risk-based exposure limit, or any other remediation standard used in connection with this chapter or a rule adopted under this chapter, including the Texas Risk Reduction Program (30 T.A.C. Chapter 350) or a similar program established by the commission, at a rate not greater than one in one million." Filed 12/17/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB858
HB 860, by Collier, Relating to changes to an application for an environmental permit before a contested case hearing on the application. Filed 12/17/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB860
HB 896, by Reynolds, Relating to air quality permits issued by the Texas Commission on Environmental Quality for certain oil and gas facilities. Filed 12/21/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB896
HB 897, by Reynolds, Relating to the analysis of inspection and maintenance requirements for air quality permits issued by the Texas Commission on Environmental Quality for certain oil and gas facilities. Filed 12/21/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB897
HB 1044, by Anchia, Relating to establishing the Texas Climate Change Mitigation and Adaptation Commission to study and address the impacts of climate change in this state. Filed 1/11/2021. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=HB1044
SB 152, by Perry, Companion bills HB 665 (Identical) and HB 668 (Identical), Relating to the regulation of groundwater conservation districts. A person with groundwater ownership and rights may petition the district to adopt modify a rule. This bill lists what the petition must contain. Filed 11/10/2020. For more information go to: https://capitol.texas.gov/BillLookup/History.aspx?LegSess=87R&Bill=SB152
Henry M. Wise, P.G.
The Wise Report
1/16/2021