n and sufficient local exhaust as needed to maintain exposure below TWA and TLV limits. Respiratory Protection: Wear dust (particulate) respirator (NIOSH TC-84A approved). 3M Company's Tech Line (1-800-243-4630) may be helpful for respirator advice and availability. For respiratory protection guideli

n and sufficient local exhaust as needed to maintain exposure below TWA and TLV limits. Respiratory Protection: Wear dust (particulate) respirator (NIOSH TC-84A approved). 3M Company's Tech Line (1-800-243-4630) may be helpful for respirator advice and availability. For respiratory protection guideli

ormal use conditions and with adequate ventilation. If elevated airborne concentrations above appli bre workplace exposers levels are anticipated, a NIOSH-approved organic vapor respirator equipped with a dust/mist prefi r should be used. Protection factors vary depending upon the type of respirator us