The goal of this project is to find countermeasures to protect High Efficiency Particulate Air (HEPA) filters, in exit ventilation ducts, from the heat and smoke generated by fire. Initially, methods were developed to cool fire-heated air by fine water spray upstream of the filters. It was recognized that smoke aerosol exposure to HEPA filters could also cause disruption of the containment system. Through testing and analysis, several methods to partially mitigate the smoke exposure to the HEPA filters were identified. A continuous, movable, high-efficiency prefilter using modified commercial equipment was designed. The technique is capable of protecting HEPA filters over the total time duration of the test fires. The reason for success involved the modification of the prefiltration media. Commercially available filter media has particle sorption efficiency that is inversely proportional to media strength. To achieve properties of both efficiency and strength, rolling filter media were laminated with the desired properties. The approach was Edisonian, but truncation in short order to a combination of prefilters was effective. The application of this technique was qualified, since it is of use only to protect HEPA filters from fire-generated smoke aerosols. It is not believed that this technique is cost effective in …

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Del City's new $1,146,000 garbage and trash incinerator plant will dispose of up to 100 tons of material a day without much noise or odor or smoke, reducing the waste material to only about 5 percent of its original volume in the form of ash."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sampling delicious onion sandwiches are Al Keller, Helen Reinheimer and Dick Dugan in the party house at the first annual 'Sting' party."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Hyde , Joe ( Noble Police Chief # 9 )"

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "South Oklahoma City artist Ron Owens will display some of his paintings of Western scenes at the Art Festival II."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Election signs line curb at corner of NE 50 and Kelley."

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, Mark White, regarding a legal question submitted for clarification: Relicensing of psychologists

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, Mark White, regarding a legal question submitted for clarification: Whether a home rule city can provide for the issuance of administrative search warrants

Weekly newspaper from Jacksboro, Texas that includes local, state, and national news along with extensive advertising.

Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with extensive advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Laura Foster and Jennifer Lee of Edmond, both 14."

Photograph used for a story in the Oklahoma Times newspaper.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "A case of neckbite was inflicted on Cindy Birdwell by Robert Worthen as Dracula, while his wife, Casey, tries to protest."

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Penny Salyer proudly displays her first prize-winning pastries."