NAME: Limestone (Respirable Fraction)
SYNONYM(s): Calate; CaCO3
NIOSH: RTECS EV9580000; 23087
Inert sedimentary mineral, principally CaCO3 formed in marine environments by chemical or biochemical action. See also Dolomite.
OSHA GENERAL INDUSTRY PEL: See Dust (Respirable Nuisance) or Dust, Total
NIOSH REL: 5 mg/m3 TWA
HEALTH EFFECTS: Nuisance particulates accumulation in lungs (HE19) Vapors or gases (HE19) IC_CAS_NUMBEL091317-65-3
PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):
MEDIA: Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns preceded by 10 mm Nylon Cyclone
MAX V: 816 Liters MIN V: 400 Liters MAX F: 1.7 L/min
ANL 1: Gravimetric
REF: 11, 12
CLASS: Fully Validated
NOTE: Field method. If the gross weight of the sample yields a concentration below the standard for the air contaminate, do not submit sample to SLTC for analysis.
ANL A: Atomic Absorption Spectroscopy; AAS
REF: 2 (OSHA ID-121)
CLASS: Not Validated
NOTE: An elemental analysis is performed for total Calcium and reported as the compound.