Final vegetative cover for closed waste sites (open access)

Final vegetative cover for closed waste sites

Low-level, hazardous, and mixed waste disposal sites normally require some form of plant material to prevent erosion of the final closure cap. Waste disposal sites are closed and capped in a complex scientific manner to minimize water infiltration and percolation into and through the waste material. Turf type grasses are currently being used as an interim vegetative cover for most sites. This coverage allows for required monitoring of the closure cap for settlement and maintenance activities. The purpose of this five year study was to evaluate plant materials for use on wastes sites after the post-closure care period that are quickly and easily established and economically maintained, retard water infiltration, provide maximum year-round evapotranspiration, are ecologically acceptable and do not harm the closure cap. The results of the study suggest that two species of bamboo (Phyllostachys (P.) bissetii and P. rubromarginata) can be utilized to provide long lived, low maintenance, climax vegetation for the waste sites after surveillance and maintenance requirements have ceased.
Date: January 22, 1993
Creator: Cook, J. R. & Salvo, S. K.
Object Type: Report
System: The UNT Digital Library
Engineering development of advanced coal-fired low-emission boiler systems (open access)

Engineering development of advanced coal-fired low-emission boiler systems

Project Work Plan was developed with joint participation by all subsystem teams. Comprehensive overall project activity schedules were developed for all individual B W groups and subcontractors with participation in Phase I.
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: DM-196 (open access)

Texas Attorney General Opinion: DM-196

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Dan Morales, regarding a legal question submitted for clarification: Whether the prekindergarten program established by section 21.136 of the Education Code is part of elementary education under Texas law, and related questions (RQ-436)
Date: January 22, 1993
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Final vegetative cover for closed waste sites. Revision 1 (open access)

Final vegetative cover for closed waste sites. Revision 1

Low-level, hazardous, and mixed waste disposal sites normally require some form of plant material to prevent erosion of the final closure cap. Waste disposal sites are closed and capped in a complex scientific manner to minimize water infiltration and percolation into and through the waste material. Turf type grasses are currently being used as an interim vegetative cover for most sites. This coverage allows for required monitoring of the closure cap for settlement and maintenance activities. The purpose of this five year study was to evaluate plant materials for use on wastes sites after the post-closure care period that are quickly and easily established and economically maintained, retard water infiltration, provide maximum year-round evapotranspiration, are ecologically acceptable and do not harm the closure cap. The results of the study suggest that two species of bamboo (Phyllostachys (P.) bissetii and P. rubromarginata) can be utilized to provide long lived, low maintenance, climax vegetation for the waste sites after surveillance and maintenance requirements have ceased.
Date: January 22, 1993
Creator: Cook, J. R. & Salvo, S. K.
Object Type: Report
System: The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection. Quarterly report No. 21, October 1--December 31, 1992 (open access)

Enhancing the use of coals by gas reburning-sorbent injection. Quarterly report No. 21, October 1--December 31, 1992

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}) on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by overfire air addition. SO{sub x} emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO{sub x} as solid sulfates that are collected in the particulate control device. This project is conducted in three phases at each site: (1) Design and Permitting, (2) Construction and Startup, and (3) Operation, Data Collection, Reporting and Disposition: Technology transfer to industry is accomplished …
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: LO93-005 (open access)

Texas Attorney General Opinion: LO93-005

Letter opinion issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Dan Morales, regarding a legal question submitted for clarification: Whether a county commissioner or other members on the county commissioners court may vote to approve the sheriff’s decision to hire the commissioner’s nephew as a deputy sheriff (ID# 18353)
Date: January 22, 1993
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: LO93-006 (open access)

Texas Attorney General Opinion: LO93-006

Letter opinion issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Dan Morales, regarding a legal question submitted for clarification: Whether chapter 143 of the Local Government Code applies to a municipality that has a paid police department and a volunteer fire department (ID# 17880)
Date: January 22, 1993
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Simulation of salt waste evaporation/crystallization (open access)

Simulation of salt waste evaporation/crystallization

The database of ProChem software has been enhanced to account for the formation of the mineral, Burkite which can form in alkaline tank wastes during evaporation. This mineral was not suspected until recent evaporation/crystallization studies suggested its presence. The enhanced data base will predict its occurrence and realm of existence. If salt cake temperatures drop below 30{degrees}C the Burkite phase is unstable toward hydrated sodium carbonates and sulfates. ProChem will not predict if this phase is more or less rapidly dissolved than its component salts. The enhanced database improves our ability to simulate waste chemistry.
Date: January 22, 1993
Creator: Orebaugh, E. G.
Object Type: Report
System: The UNT Digital Library
Engineering development of advanced coal-fired low-emission boiler systems. Quarterly technical progress report and monthly status report (open access)

Engineering development of advanced coal-fired low-emission boiler systems. Quarterly technical progress report and monthly status report

Project Work Plan was developed with joint participation by all subsystem teams. Comprehensive overall project activity schedules were developed for all individual B&W groups and subcontractors with participation in Phase I.
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection (open access)

Enhancing the use of coals by gas reburning-sorbent injection

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO[sub x]) and sulfur (SO[sub x]) on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO[sub x] and 50 percent in SO[sub x] emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO[sub x] is converted to N[sub 2]. The combustion process is completed by overfire air addition. SO[sub x] emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO[sub x] as solid sulfates that are collected in the particulate control device. This project is conducted in three phases at each site: (1) Design and Permitting, (2) Construction and Startup, and (3) Operation, Data Collection, Reporting and Disposition: Technology transfer to industry is accomplished …
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Simulation of salt waste evaporation/crystallization (open access)

Simulation of salt waste evaporation/crystallization

The database of ProChem software has been enhanced to account for the formation of the mineral, Burkite which can form in alkaline tank wastes during evaporation. This mineral was not suspected until recent evaporation/crystallization studies suggested its presence. The enhanced data base will predict its occurrence and realm of existence. If salt cake temperatures drop below 30[degrees]C the Burkite phase is unstable toward hydrated sodium carbonates and sulfates. ProChem will not predict if this phase is more or less rapidly dissolved than its component salts. The enhanced database improves our ability to simulate waste chemistry.
Date: January 22, 1993
Creator: Orebaugh, E. G.
Object Type: Report
System: The UNT Digital Library
Texas Parks & Wildlife News, January 22, 1993 (open access)

Texas Parks & Wildlife News, January 22, 1993

Weekly newsletter discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date: January 22, 1993
Creator: Texas. Parks and Wildlife Department.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Register: Annual Index January-December, 1992, Volume 17, Number 1-96, (Part I - pages 271-371), January 22, 1993 (open access)

Texas Register: Annual Index January-December, 1992, Volume 17, Number 1-96, (Part I - pages 271-371), January 22, 1993

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: January 22, 1993
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Register: Annual Index January-December, 1992, Volume 17, Number 1-96, (Part II - Pages 372-456), January 22, 1993 (open access)

Texas Register: Annual Index January-December, 1992, Volume 17, Number 1-96, (Part II - Pages 372-456), January 22, 1993

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: January 22, 1993
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History