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Examination of DEHP filter test methods and alternative methods in light of suspected DOP carcinogenicity

Description: The QA test could be simplified and possibly provide more information about filter performance if a polydisperse aerosol is used. There are several difficulties associated with the monodisperse generator. The generator used to produce large quantities of monodisperse aerosol is an expensive part of the equipment required for QA tests. The generator also requires diligent operation to provide consistent performance. The generation of a consistent polydisperse aerosol would be an easier task. Mod… more
Date: January 1, 1982
Creator: Tillery, M.I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Oil shale health and environment research

Description: While there have been sporadic efforts to demonstrate certain shale oil extraction technologies in recent years, none of the techniques have been thoroughly analyzed to determine the extent of potential occupational health impacts and even those technologies that have been demonstrated cannot be regarded as typical of a scaled-up, fully mature industry. Industrial hygiene studies have served to identify operations within certain technologies where mitigating methods can and should be applied to… more
Date: January 1, 1980
Creator: Holland, L.M. & Tillery, M.I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of particle-size variation on filtration efficiency measured by the HEPA-filter quality-assurance test

Description: A theoretical model has been used to calculate the filtration efficiency that would be indicated by the photometer for challenge aerosols of different size distributions and HEPA filters with different efficiencies as functions of particle size. The model compares the calculated overall efficiency indicated by the photometer with efficiencies calculated with respect to particle number and mass. This calculation assumes three aerosol distributions previously measured at the Filter Test Facilitie… more
Date: January 1, 1982
Creator: Tillery, M.I.; Salzman, G.C. & Ettinger, H.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Cascade Impactor Operating at Low Volumetric Flow Rates

Description: Report describing a five-stage cascade impactor, which has four impactor stages in which round jets are used and a filter stage. The method of calibrating the device is described. The significance of the collection efficiency and wall losses with respect to sampling for mass distributions is discussed.
Date: December 1962
Creator: Mercer, T. T.; Tillery, M. I. & Ballew, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aerosol sampling and characterization in the developing US oil-shale industry

Description: Aerosol sampling and characterization studies of workplace air were conducted at four demonstration-scale oil shale facilities located in northwestern Colorado and northeastern Utah. These facilities consisted of an underground mining/aboveground retorting facility, two modified in situ retorting facilities with associated underground mining, and a true in situ retorting facility. Emphasis was placed on study of the retorting phase of operation at these facilities. Aerosol samples were collecte… more
Date: January 1, 1981
Creator: Hargis, K.M.; Tillery, M.I.; Gonzales, M. & Garcia, L.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparative inhalation studies with American and Estonian oil shale

Description: This paper presents interim findings on studies comparing the effects of long-term inhalation of quartz, Estonian kukersite, or American Green River shales in rats. No tumors have been observed in the exposed animals. In the studies with Green River shales, the rate of death increased as the animals approached 2 years of exposure. Varying degrees of lung fibrosis has been noted in these animals also. Animals in the kukersite group exhibited only mild changes with some alveolar thickening, and i… more
Date: January 1, 1981
Creator: Holland, L.M.; Vigil, E.A.; Gonzales, M. & Tillery, M.I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance of multiple HEPA filters against plutonium aerosols

Description: Performance of multiple stages of high-efficiency particulate air (HEPA) filters has been verified against plutonium aerosols similar in size characteristics to those challenging the air-cleaning systems of plutonium-processing facilities. An experimental program was conducted to test each filter in systems of three HEPA filters operated in series against /sup 238/PuO/sub 2/ aerosols as high as 3.3 x 10/sup 10/ dis/s . m/sup 3/ in activity concentration and ranging from 0.22 ..mu..m to 1.6 ..mu… more
Date: November 1, 1976
Creator: Gonzales, M.; Elder, J. C.; Tillery, M. I. & Ettinger, H. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wind and saltation driven particle resuspension in a wind tunnel

Description: To determine parameters of primary importance in wind and saltation driven resuspension of fine particles from surfaces, wind tunnel experiments were conducted to study the resuspension of small polydisperse particles (diameter <10 ..mu..m) by monodisperse saltation particles (diameter >80 ..mu..m). The experiments were designed to simulate the atmospheric boundary layer resuspension of fine particles. 3 refs., 1 tab.
Date: January 1, 1985
Creator: Fairchild, C. I.; Tillery, M. I.; Wheat, L. D. & Redmond, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aerosol sampling and characterization for hazard evaluation. Progress report, October 1, 1977-September 30, 1978. [/sup 239/Pu aerosol monitor performance in work area]

Description: Measurements of the dilution of air contaminants between worker breathing zone and area air samplers were made by releasing a test fluorescent aerosol in workrooms equipped with aerosol surveillance systems. These data were used to evaluate performance and suggest improvements in design of alarming air monitor systems. In one workroom studied, average half-hour breathing zone air concentration needed to trigger alarm was found to be 960 times the maximum permissible air concentration for occupa… more
Date: November 1, 1979
Creator: Scripsick, R.C.; Tillery, M.I.; Stafford, R.G. & Romero, P.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lung cancer in rats exposed to fibrogenic dusts

Description: Fischer-344 rats were exposed to quartz dusts and to quartz-bearing oil shale dusts in long-term inhalation studies. Aerosol concentrations of 12 mg/m/sup 3/ and 152-176 mg/m/sup 3/ for quartz and shale dusts, respectively, were used in exposure regimens lasting up to two years. Pulmonary fibrosis was observed in most animals surviving beyond 400 days. Adenocarcinomas and epidermoid carcinomas of the lung were observed in animals from all exposure groups, including those exposed to quartz alone… more
Date: January 1, 1984
Creator: Holland, L. M.; Wilson, J. S.; Tillery, M. I. & Smith, D. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Differences in in vitro dissolution properties of settled and airborne uranium material

Description: The dissolution behavior of settled and airborne uranium material produced by firing of depleted uranium munitions was studied using an in vitro dissolution technique. Differences in the composition of bulk and respirable fraction samples of these materials were observed. Dissolution analysis results suggest that under some conditions a rapidly dissolving uranium fraction may be formed. This fraction may play an important role in determining hazard potential associated with inhalation exposure … more
Date: January 1, 1984
Creator: Scripsick, R. C.; Crist, K. C.; Tillery, M. I. & Soderholm, S. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

In-place testing of tandem HEPA filter stages using fluorescent aerosols

Description: Fluorescent test aerosols were used in field testing of large multiple-stage HEPA filter systems. The technique excluded interference from non-fluorescent background particles known to leak into the plenum or ducting between the filters and the downstream sampling probe. This technique solved the problem of measuring extremely low concentrations of the test aerosol in the presence of background aerosol. The upstream fluorescent test aerosol was diluted with clean air and drawn into a single par… more
Date: January 1, 1980
Creator: Elder, J. C.; Kyle, T. G.; Tillery, M. I. & Ettinger, H. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Operating Characteristics of the Lauterbach and Dautrebande Aerosol Generators

Description: From Abstract: "The air flow through the jet, the effect of a pre-humidifier on the water vapor content of the jet air, the cooling effect of the jet air on the generator solution, and the amount of water vapor carried away by the jet air were also determined and the results are discussed."
Date: February 1963
Creator: Mercer, T. T.; Tillery, M. I. & Flores, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Potential application of a single-particle aerosol spectrometer for monitoring aerosol size at the DOE filter test facilities

Description: At each of the three Department of Energy (DOE) filter test facilities (FTF), a commercial single particle aerosol spectrometer, the LAS-X, was used to demonstrate that the test aerosol produced by each of the Q107 high efficiency particulate air (HEPA) filter test systems was polydisperse with a geometric standard deviation greater than 1.35, and a geometric mean diameter less than 0.2 ..mu..m. These results confirm the work of others that the OWL (mechanical analyzer) is inadequate for assuri… more
Date: January 1, 1982
Creator: Salzman, G.C.; Ettinger, H.J.; Tillery, M.I.; Wheat, L.D. & Grace, W.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Aerosol deposition along the respiratory tract at zero gravity: a theoretical study

Description: Significant fractions of airborne particles composing inhaled aerosols can deposit along the respiratory tract during breathing. Depending on the environmental condition, some particles that enter the body via the respiratory route can pose health hazards. On earth, three general rate mechanisms are active in this deposition process: (1) inertial impaction; (2) diffusion; and (3) gravity-dependent sedimentation. Space craft, stations, and bases represent unique settings where potentially pathog… more
Date: January 1, 1984
Creator: Lehnert, B. E.; Smith, D. M.; Holland, L. M.; Tillery, M. I. & Thomas, R. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of a radioactive aerosol surveillance system

Description: Measurements of the dilution of air contaminants between worker breathing zone and area air samplers were made by releasing a test aerosol in a workroom equipped with an aerosol surveillance system. The data were used to evaluate performance, and suggest improvements in design of the workroom's alarming air monitor system. It was found that a breathing zone concentration of 960 times the maximum permissible concentration in air (MPC/sub a/) for a half-hour was required to trigger alarms of the … more
Date: June 26, 1978
Creator: Scripsick, R. C.; Stafford, R. G.; Beckman, R. J.; Tillery, M. I. & Romero, P. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Aerosol sampling and characterization for hazard evaluation. Progress report, July 1, 1975--September 30, 1976. [Pu aerosols]

Description: A draft Manual of Recommended Practice for Aerosol Sampling and Evaluation was completed and sent to the Energy Research and Development Administration (ERDA) Division of Safety, Standards, and Compliance (DSSC) for review. The results of the Survey of Sampling Techniques for Defining Respirable Concentration and/or Particle Size Characteristics of Aerosols were published as LA-6087. The need for greater standardization of ERDA aerosol sampling techniques was indicated. The Aerosol Training Cou… more
Date: April 1, 1977
Creator: Scripsick, R. C.; Gray, D. C.; Tillery, M. I.; Stafford, R. G. & Romero, P. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Standard instrument calibration aerosol test system

Description: >A system for testing personal respirable'' samplers in a well characterized coal dust environment is described. Components of the system, contained in one cabinet, include a Wright Dust Feed mechanism, tritide charge neutralizer, aerosol chamber, electrostatic precipitator sampler, and a GCA Respirable Dust Monitor. in addition to air flow plumbing and controls. Employment of this test system to evaluate the performance of personal respirable'' particulate air sampling instruments required var… more
Date: September 1, 1973
Creator: Fairchild, C. I.; Ettinger, H. J.; Carson, G. A.; Gettemy, D. J.; Tillery, M. I. & Almich, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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