8484 Georgia Avenue Suite 1000 Silver Spring, MD 20910 phone: 301.578.8500 fax: 301.578.8572 www.cpwr.com • www.elcosh.org Application of End-of-Shift Respirable Crystalline Silica Monitoring to Construction Martin Harper Chang-Yu Wu Chih-Hsiang Chien Zefon International, Inc. University of Florida June 2020