Isocyanates and AirVerters CAPS II System -

Hexamethylene diisocyanate is used as a polymerizing agent in polyurethane paints and coatings, commonly known as isocyanates. Short-term exposure to high concentrations of hexamethylene diisocyanate in humans can cause: • pulmonary edema • coughing • shortness of breath • eye, ear, & nose irritation • chronic lung problems One of the main uses of hexamethylene diisocyanate is as a polymerizing agent in polyurethane spray paint formulations and coatings, and unprotected workers may be exposed to the chemical during spray applications of polyurethane paints. To achieve compliance administrative or engineering controls must be implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in this section. Below is an example of implementing an engineering control: the AirVerter CAPS II fitted with a SharpShooter tool. The permissible exposure limits (PEL) are 0.005 results using the CAPS II system was <0.00072 ppm below the detection limit (BDL) of the analytical method. (A) Sample Numbers - KT10021-1 personal sample Compound - examethylene diisocyanate 8-hr Time Weighted Average (TWA)***mg/m3 -0.00072 ppm (BDL)* CAL/OSHA Permissible Exposure Limit (PRL)**mg/m3 - 0.005 ppm CAL/OSHA PEL Exceeded Yes/No - No (B) Sample Numbers - KT 100211-2 area sample at exhaust line Compound - Hexamethylene diisocyanate 8-hr Time Weighted Average (TWA)***mg/m3 - <0.00072 ppm (BDL)* CAL/OSHA Permissible Exposure Limit (PRL)**mg/m3 - 0.005 ppm CAL/OSHA PEL Exceeded Yes/No - No *BDL-Below the detection limit of the analytical method **Permissible Exposure Limit: The permissible concentration in air of a substance to which nearly all workers may be repeatedly exposed 8 hours a day, 40 hours a week, for 30 years without adverse effects. ***TWA-Time Weighted Average-the airborne concentration of a contaminant averaged over the work period usually 8 hours Prepared by Jeff Hill for AirVerter

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