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Insect-Powder Duster

Description: Patent for "a truck mounted upon wheels, to the reat end of which is adjusted a sifter that, as the machine is progressing, will have lateral reciprocating motion imparted thereto and eject powder through an attached meshed screen" (lines 10-15).
Date: April 23, 1889
Creator: Glover, Charles Bazel
Partner: UNT Libraries Government Documents Department

Tiered Development of Human Health PCLs

Description: This guidance document discusses and illustrates the process of establishing Protective Concentration Levels (PCLs) in accordance with the various tiers set forth in ΞΎ650.75 of the Texas Risk Reduction Program (TRRP) Rule.
Date: April 2013
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department

Community Air Toxics Monitoring Network Report, October 1993-December 1994

Description: A report describing the results of monitoring and testing at sites across Texas for air toxins with descriptions of each site and detailed charts of the amounts of various chemicals found in the air between October 1993 and December 1994.
Date: December 1995
Creator: Texas Natural Resource Conservation Commission. Monitoring Operations Division.
Partner: UNT Libraries Government Documents Department

Community Air Toxics Monitoring Program Report, October 1992-September 1993

Description: A report describing the results of monitoring and testing at sites across Texas for air toxins with descriptions of each site and detailed charts of the amounts of various chemicals found in the air between October 1992 and September 1993.
Date: May 1994
Creator: Texas Natural Resource Conservation Commission. Monitoring Operations Division.
Partner: UNT Libraries Government Documents Department

[Letter from Ray Riley to the University of Texas Department of Pathological Chemistry - September 1936]

Description: Letter from Ray Riley to the members of the Department of Pathological Chemistry at the University of Texas. Mr. Riley acknowledges receipt of a letter of September 11th and asks that the doctors provide the outcomes of their experiments with the provided chemicals.
Date: September 14, 1936
Creator: Riley, Ray
Partner: Moody Medical Library, UT

Process of Saturating

Description: Patent for a process saturating wood with preservatives. Illustration included.
Date: November 7, 1905
Creator: Jones, William C.; Stratford, William R. J.; Byrnes, Frank B. & Nixon, Edward J.
Partner: UNT Libraries Government Documents Department

Soil and Groundwater Response Objectives

Description: This document describes the soil and groundwater response objectives that must be achieved in order to attain Remedy Standard A or B under the Texas Risk Reduction Program (TRRP).
Date: May 2013
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department

Facility Operations Area

Description: This document provides guidance on the information and procedures necessary to establish a Facility Operation Area (FOA) to implement corrective action in the operational area of a petroleum refinery or chemical plant in response to multiple sources of chemical of concern (COCs).
Date: January 2010
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department

Critical PCLs

Description: This document is intended to explain the role of the critical protective concentration level (PCL) in the Texas Risk Reduction Program (TRRP) rule and outline the steps to determine the critical PCL on a site-specific basis.
Date: March 2009
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department

Tier 1 PCL Tables

Description: THis guide provides instruction in the correct interpretation and use of the Tier 1 Protective Concentration Levels (PCL) tables.
Date: March 2009
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department

Toxicity Factors and Chemical/Physical Parameters

Description: This guidance document addresses how changes in human toxicity factors will be handled, establishes a schedule for updating the human toxicity factors table, and describes the procedure for requesting toxicity factors and chemical/physical parameters for chemicals of concern (COC) not listed on the Tier 1 Protective Concentration Limit tables.
Date: March 2009
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department

Human Health Points of Exposure

Description: This document is intended to describe and depict the on-site and off-site locations of the prescribed and alternate human health points of exposure (POEs) to environmental media.
Date: March 2009
Creator: Texas Commission on Environmental Quality
Partner: UNT Libraries Government Documents Department