Accession Number : AD0806393

Title :   SILICA CONTENT OF DUST FROM TANK RANGES,

Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s) : Kruse, C. A. ; Carey, P. H. ; Howe, D. J.

Report Date : 14 JAN 1947

Pagination or Media Count : 11

Abstract : In the Fort Knox tank training areas analyses have been made of surface soil and air-borne dust in tanks on maneuvers. The results are: (1) surface soil samples from two distant tank ranges have a high concentration of silica with an average of 74.3% total silica and 63.9% free silica; (2) the air-borne dust within tanks from the same two tank ranges contains an average of 21.5% by weight of particles below an equivalent diameter of three (3) microns; (3) of the particles of air-borne dust less than three (3) microns in diameter, 10% is free silica; (4) these particles of free silica less than three (3) microns in diameter constitute 2.2% by weight of the total dust. The question is raised whether such a concentration of highly siliceous dust, especially in the dangerous sizes less than ten (10) microns or three (3) microns in diameter, constitutes a medical hazard to operating armored personnel. (Author)

Descriptors :   *DUST), (*TANKS(COMBAT VEHICLES), RESPIRATORY DISEASES, HAZARDS, AIR POLLUTION, SAND, SILICON DIOXIDE, AIRBORNE, PARTICLES, PARTICLE SIZE, DISTRIBUTION, SOILS, RANGES(FACILITIES), MILITARY PERSONNEL, EXPOSURE(PHYSIOLOGY).

Subject Categories : Combat Vehicles
      Air Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE