Document 6bDaN6D1zp7ww6GRDKb4dwm5E

tbe Finish Department whore branch ducts termnata in open ended exhaust trunks which are either pushed out of the way and not used or placed in the vicinity of the point of oust generation. Zither way, dust capture is ruiniiaol, and air volumes end energy are being wasteo. The trunks should bo connected to hoods or enclosures which surround the sources of dust release, where trunks are unused or serve no purpose, they should be disconnected at their point of entry into the main duct and the opening sealed in a manner to prevent addi tional friction loss. Although mains end branches are basic ally well designee and amenable to systems balancing, ductwork should be thoroughly checked to insure that principles of good duct design are consistent throughout* there elbow radii, aspect ratios, duet sires, branch entries, duct enlargements, and duct contractions do not correspond to the appropriate examples in Figures 6-13, 6-20, and 6-22, redesign should be considered prior to systems balance. Exhaust hood design at both weigh scales in upper compounding is not adequate either because of poor enclosure or excessive handling requirements by tbe operator* Redesign is planned for the powder weighing exhaust hood which should reduce handling and improve collection efficiency. The asbestos weigh scale should also undergo redesign to provide better enclosure and increased capture velocity at the face of the hood* The existing hood is open - two sides, reducing faoe velocity and resultant fiber capture. In addition, the exhaust duct opens directly into the hood with no plenum transition. This condition also interferes with entrainment of airborne fibers. ' When exhaust systems have been improved in the areas discussed above, and/or a* outlined in the "Recommendations", airborne control of both arbestos and lead exposures will ensue. How ever. lead absorption by ingestion must also be considered, and the pleat should make extended efforts to reduce this source of exposure* Extensive clean-up end continued main tenance is required in all lead handling areas, but particu larly in Compounding where spilled powders, settled fine dust deposits, and caked raw materials on floors in traffic areas were observed. These conditions enhance the possibilities of inadvertent lead ingestion, especially as the personal hygiene of operators also tends to deteriorate under these conditions. As indicated in the "Recoianendations", smoking, and consumption of food and beverages should be strictly prohibited, not only in Compounding but in all production areas. Although other SPNY 001293