Document N2K10RkLG9enerned9L56oyKb

Table I - Continued Applicatton "Thixotropic* im_____________ Auent Large polyester fiber --0.51 RG-244 glass boat yard. and --0.5X pyrogenic Silica -0.5X RG-244 and --0.5X pyrogenic silica Activity Typical laminating operations. Standard airsupported chopper gun. Edge grinding of cured resin boat hulls and Inserts. Outdoors. Dust Counts flbers/Ml.1** Total Oust^ >5/^ HPPCF Holes and ComncntS^ 1.1 0.9 o.e 1.2 1 1.3 3.0 2.3 2.1 13-1 Samples taken at breathing zone of operator spraying .!!:<> )22.3'*' / into a boat mold. Samples marked (a) taken during ` gel coat spraying about SO feet away which fogged 1 entire building. 10.8 Fibers counted not typical of asbestes. n... Fibers counted not typical of asbestos. ... j' Hind was quite strong and changing directions -- frequently. Heavy cloud of visible dust produced. large polyester furniture coating Manufacturer. Good building ventilation. H3.05J RG-244 Hand sanding polyester coatings. 0.002 0.002 0.003 1.6 1.9 1.9 Largo power Sander with integral hood sanding polyester casting. 0.001 0.002 0.002 0.6 Small amount of dust found apparently generated 2.6 during stacking of sanded parts. . 3.5 Hold filling area. (Liquid polyester poured.) > 0.001 1.0 Nixing area where RG-244 added to liquid poisesster. ' 0.004 3.8") 0.007 5.4 f- 0.005 ............ Background dust from pecan shell flour and ground perlite used in blend. (1) Present OSHA standard for asbestos fibers (~5 ailerons In length) Js 5 fibers per Milliliter as an 8-hour tine-weighted average. 10 Fibers per Milliliter May be allowed for no More than IS Minutes per hour for up to 5 hours in an 8-hour day. (2) HPPCF - Hill Ions of particles per cubic foot of air. The present OSHA standard for amorphous silica is 20 HPPCF, and the existing OSHA standard of SO HPPCF would apply to both fibrous glass and the dust from polynerlzad styrene. (3) All samples taken at breathing zona level of operator. 10 Minute collection tine unless noted. DUP 090287 o