Key References.

ESL Guidelines Texas Commission on Environmental Quality (TCEQ). 2006. Guidelines to develop effects screening levels, reference values, and unit risk factors. Chief Engineer’s Office. RG-442. Texas Commission on Environmental Quality (TCEQ). 2007. Significant figures used in the derivation of Effects Screening Levels. Toxicology Section, Office of the Chief Engineer. Texas Commission on Environmental Quality (TCEQ). 2007. Updated Odor References: Appendix B and C. Toxicology Section, Office of the Chief Engineer.