In defense of the dust count technique.
NISOH has recommended a Standard for Occupational Exposure to crystalline silica to OSHA with documentation based on dust count studies relating to health effects. This standard dictates sampling by mass respirable method only. A dual standard as in ACGIH-TLV list should be promulgated by OSHA which includes the dust count standard.
D000395:Air Pollutants, Occupational / Q000032:analysis; D004391:Dust / Q000032:analysis*; D008452:Maximum Allowable Concentration; D008722:Methods; D009787:Occupational Medicine / Q000592:standards*; D010316:Particle Size; D012822:Silicon Dioxide / Q000032:analysis*; D014481:United States; D014961:X-Ray Diffraction
D000395:Air Pollutants, Occupational; D004391:Dust; D012822:Silicon Dioxide