Document Xz0L1zx0gmBppdG2j6RbvMoVG

FOAM t02 -- LAKt CHARLtS L*. aaTn iom 4' ?o-1ac j CHEMICALS B, p INDUSTRIES TO See Distribution FROM M. Wood DATE SUBJECT INTEROFFICE / LAKE CHARLES X^'T 1.197} September 26, 1973 Particulate Sampling at Sandblasting Area Particulate air sampling was done on 9/17/73 fn the sandblasting area. Samples were taken approximately 35 yards downwind of the sandblasting operations. Testing included total particulate, particle sizing, and metal dust. Results are appended. MW:rw C. P. LeBlanc Gus Younger Torn Rogers Ralph White SL 093252 Particulate Testing at Sandblasting Area Total Particulate (Membrane Filter-Method) 66.6 mg/M3 Particulate Sizing (Midget Cascade Impactor) > 5-5 microns (non respirable) 46% 5*5 to 3*5 microns (20% respirable) 33% 3-5 to 2.0 microns (50% respirable) 2.0 to 0.3 microns (100% respirable) 9% Total Respirable Dust 22% or 15 mg/M3 Metal Dust (Atomic Absorption Analyses of Acid Extraction) Cadmium < 60 pg/M3 Chromium < 120 pg/M3 Copper < 60 pg/M3 Lead < 60 pg/M3 Zinc 1520 pg/M3 VSL 093253