Document peOMNr8wr9O8oNL5qzMnB3YmD

/fV>or 0-9 / INTERDEPARTMENTAL COMMUNICATION TO: FROM: Mr. M. F. Fink J. R. Watt SUBJECT; PLASTER FORMULAS Re: Possible Hazardous Additives DATE: July 6, 1972 LOCATION: Tigard LOCATION: Tigard Following is the information requested: Sand - Up to 50% in some thincoat plasters at TEX, BR, BGA, FTD, S, and WILM. Up to 52% in one metal casting plaster at Akron Silica Flour - Up to 5% in BR R&R Special plaster (BR-810). Up to 2-2% in Repair Yard Densite (BR-821) . Fungicide - Up to 2 oz. per ton in some casting and pottery plaster formulas at TEX, BR, BGA, S and W. Asbestos - Up to 2% in patching plaster at TEX and BGA. Up to 6%%> in metal casting plaster at W. Up to 8% in metal casting plaster at BGA. Up to 5% in patching plaster at BR. Olivine Flour (Magnesium Iron Silicate) - Fifty percent in metal casting plaster BR-772. Litharge (Lead Oxide Powder) - 1.5% in Ce^trock BR-350. Very little is sold and this formula should probably be cancelled. Zinc Stearate - 1.9% in Road Plaster BR-843. Fibrous Talc - Used in some metal casting plasters. Up to 22%% at TEX, AK, and W. Up to 27% at BR. Up to 257. in Prepared Trowel Finish S-161. Hydrated Lime - Up to 6%% in Dens-Cote plaster at TEX, BR, BGA,' FTD, S, and W. Up to 60% in Smooth Trowel Finish TEX-163. JRW:elz J. R. W. SGP 0015883