Reviewed Studies Pertaining to High - efficiency

Particulate Air Filter Shroud Effectiveness Akbar - Khanzadeh, Farhang and Randall L. Brillhart . Respirable Cry stalline Silica Dust Exposure During Concrete Finishing (Grinding) Using Hand - held Grinders in the Construction Industry . Annals of Occupational Hygiene 46 (3): 341 - 346 (2002). Akbar - Khanzadeh, Farhang, Shery l Milz, April Ames, Pamela P. Susi, Michael Bisesi, Sadik A. Khuder, and Mahboubeh Akbar - Khanzadeh. Cry stalline Silica Dust and Respirable Part iculate Matter During Indoor Concrete Grinding

—Wet Grinding and Ventilated Grinding Compared with Uncontrolled Conventional Grinding . Journal of Occupat ional and Environmental Hygiene 4:770 - 779 (2007). Centers for Disease Control and Prevention: National In stitute of Occupational Safet y and Health. In - depth Survey Report of Control of Respirable Dust and Crystalline Silica from Grinding Concrete at Messer Construction, Newport, Kentuck y, and Baker Concrete Construction, Day ton, Ohio. August 2002. Chish olm, Jim . Respirable Dust and Respirable Silica Concentrations from Construction Activities . In door and Built Environment 8:94 (1999). Collingwood, Scott Charles. Research to Practice: Evaluations and Recommendations for Local Exhaust Ventilation Designed to Reduce Respirable Cry stalline Silica and Dust Exposures Experienced During Mortar Removal. Doctoral Dissertation, University of Io wa (2006). Croteau, Gerry

A., Mary Ellen Flanagan, Janice E. Camp, and Noah S. Seixas. The Efficacy of Local Exhaus t Ventilation for Controlling Dust Exposures During Concrete Surface Grinding. Annals of Occupational Hy gi ene 48(6):509 - 518 (2004). Croteau, Gerry

A., Steven E. Guffey , Mary Ellen Flanagan, and Noah S. Seixas. The Effect of Local Exhaust Ventilation Controls on Dust Exposures During Concrete Cutting and Grinding Activities. American Industrial Hy giene Association Journal 63 ( 4 ): 458 - 467 (2002). Heitbrink, William A., Thomas C. Cooper, and Marjorie A. Edmonds. Evaluation of Ventilated Sanders in the Auto body Repair Industry . Am erican Industrial Hygiene Association Journal 55(8):756 - 759 (1994). Nij, Evely

n Tjoe, Simone Hilhorst, Ton Spee, Judith Spierings, Friso Steffens, Mieke Lumens, and Dick Heederik . Dust Control Measures in the Construction Industry . Annals of Occupational Hy giene 47 (3): 211 - 218 (2003).Ojima, Jun . Efficiency of a Tool - mounted Local Exhaust Ventilation Sy stem for

Controlling Dust Exposure during Metal Grinding Operations . Industrial Health 45 (6) :817 - 819 (2007). Seixas, Noah S., Janice Camp, Mary Ellen Flanagan, and Gerry A. Croteau . Evaluation of Dust Control Technologies in Construction Tasks . University of Washington Department of Environmental Health (2004). Shepherd, S., S.R. Woskie, C. Holcroft, and M. Ellenbecker . Re ducing Silica and Dust Exposures in Construction During Use of Powered Concrete - cutting Hand Tools: Efficacy of Local Exhaust Ventilation on Hammer Drills . Journal of Occupational and Environmental Hy gi ene 6:42 - 51 (2009). Teitsworth, Jan Edward and Maur a J. Sheehan. The Effectiveness of Local Exhaust Ventilated (Shrouded) Hand Power Tools Used for Grinding/Sanding Composite Materials. American Industrial Hygiene Association Journal 59:689 - 693 (1998). Thorpe, A., A.S. Ritchie, M.J. Gibson, and R.C. Bro wn . Measurements of the Effectiveness of Dust Control on Cut - off Saws Used in the Construction Industry . Ann als of Occupational Hy giene 43(7):443 - 456 (1999).