AIPG-TX

The TCEQ has made several minor revisions to the Texas Risk Reduction Program (TRRP) Tier 1 Protective Concentrations Levels (PCLs) which were released in early September 2014. The revised tables, dated November 12, 2014 will replace the September 2014 tables. You can access the revised tables using the link:

http://www.tceq.texas.gov/remediation/trrp/trrppcls.html

The 2014 PCL tables are a single Microsoft Excel workbook, with each table on a separate worksheet. The tables are also presented as a print only Adobe Acrobat portable document format (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 Coefficienct (Koc) Values for Ionizing Organic COCs as a Function of pH
• Gastrointestinal and Dermal Absorption Fractions (ABSGI and ABS.d Values)
• 2011 List of Updates

The PCL tables updated in September 2014 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:

http://www.tceq.texas.gov/publications/rg/rg-366_trrp_23.html

For additional information on the PCL tables, contact Jessica Mauricio at jessica.mauricio@tceq.texas.gov.

Henry M. Wise, P.G.
The Wise Report