Document DvqvNDBmVZqbNpv7DwVQM6ky5

46--Safety Engineering Tables CHART 46-A AVERAGE CONCENTRATIONS OF AIRBORNE PARTICULATE MATTER 1000000 I LOW PRESSURE PNEUMATIC CONVEYING EXPLOSIVE CONC OF 'OOOOO- flow, COAL AIRBORNE DUSTS 10000 3ANDAR0 STORE CKTnkS STACK EFFLUENT CONCENTRATION BLAST FUHNACF BRET IRON FOUNDRT DUST STORM aALTmoftc FLY ASH ^ ASMtSTa MB.WMWCC EFFLUENT '0* omxiNs COAL CUTTM8 MINE AIR CLOUDBURST SMELTERS 4- MOOERATE RAIN 100- _________l OPEN HEARTH ELECTRIC STEEL BRASS FOUNDRY ORIZZLE breaxinb (0- COTTON MILL----- i--------------- WORKROOM INDUSTRIAL 2ZK0". shake* T fLPAftlftCl FOG a MIST FOUNDRIY I -------------- 1 WORKROOM AIR mPOoUloRtwNSbII FeES ZnO Mn 1 DISTRICT AIR - viscous ncmur AM CONDtTIOWNS FILTERS INDUSTRIAL CLOTH FILTERS FAOttC FILTERS POLLEN CITY AIR RURAL AND SUBURBAN AIR SiOg CrOj Sb As Pb Cd HO -01- .THRESHOLD LIMITS FOR MINERAL DUSTS AND TOXIC METALS ELECTROSTATIC PRECIPITATORS 001- EFFLUENT AIR -0001 CELLULOSE - ASBESTOS PAPERS 00001- - - -000001 THRESHOLO OF ODORS jOOOOOOI' ooooooot Pu Ro* OOOOOOOOt- THRESHOLD LIMITS FOR RADIOACTIVE ELEMENTS l,SL_^4I0*17) J-OOOOOOOOOI MILLIGRAM PER CUBIC METER Adapted from First and Drmker "Concentrations of Particulates Found in Air" AMA Archives of Industrial Hy giene and Occupational Medicine, 5 376-386 (Apnl 1952) Coucersionj assume that 0 l mg contains 5 million particles 1468