Beryllium Oxide Forming (e.g., pressing, extruding)

For pressing operations:

(1) Install local exhaust ventilation (LEV) on oxide press tables, oxide feed drum breaks, press tumblers, powder rollers, and die set disassembly stations;

(2) Enclose the oxide presses; and

(3) Install mechanical ventilation (make-up air) in processing areas.

Primary Beryllium Production; Beryllium Oxide Ceramics and Composites

Chemical Processing Operations (e.g., leaching, pickling, degreasing, etching, plating)

For medium and high gassing operations:

(1) Perform operation with a hood having a maximum of one open side; and

(2) Design process so as to minimize spills; if accidental spills occur, perform immediate cleanup.

Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Copper Rolling, Drawing and Extruding

Finishing (e.g., grinding, sanding, polishing, deburring)

(1) Perform portable finishing operations in a ventilated hood. The hood should include both downdraft and backdraft ventilation, and have at least two sides and a top.

(2) Perform stationary finishing operations using a ventilated and enclosed hood at the point of operation. The grinding wheel of the stationary unit should be enclosed and ventilated.

Secondary Smelting; Fabrication of Beryllium Alloy Products; Dental Labs

Furnace Operations (e.g., Melting and Casting)

(1) Use LEV on furnaces, pelletizer; arc furnace ingot machine discharge; pellet sampling; arc furnace bins and conveyors; beryllium hydroxide drum dumper and dryer; furnace rebuilding; furnace tool holders; arc furnace tundish and tundish skimming, tundish preheat hood, and tundish cleaning hoods; dross handling equipment and drums; dross recycling; and tool repair station, charge make-up station, oxide screener, product sampling locations, drum changing stations, and drum cleaning stations.

(2) Use mechanical ventilation (make-up air) in furnace building.

Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Nonferrous Foundries; Secondary Smelting

Machining

Use: (1) LEV consistent with ACGIH® ventilation guidelines on deburring hoods, wet surface grinder enclosures, belt sanding hoods, and electrical discharge machines (for operations such as polishing, lapping, and buffing);

(2) High velocity low volume hoods or ventilated enclosures on lathes, vertical mills, CNC mills, and tool grinding operations;

(3) For beryllium oxide ceramics, LEV on lapping, dicing, and laser cutting; and

(4) Wet methods (e.g., coolants).

Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Copper Rolling, Drawing, and Extruding; Precision Turned Products

Mechanical Processing (e.g., material handling (including scrap), sorting, crushing, screening, pulverizing, shredding, pouring, mixing, blending)

(1) Enclose and ventilate sources of emission;

(2) Prohibit open handling of materials; and

(3) Use mechanical ventilation (make-up air) in processing areas.

Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Aluminum and Copper Foundries; Secondary Smelting

Metal Forming (e.g., rolling, drawing, straightening, annealing, extruding)

(1) For rolling operations, install LEV on mill stands and reels such that a hood extends the length of the mill;

(2) For point and chamfer operations, install LEV hoods at both ends of the rod;

(3) For annealing operations, provide an inert atmosphere for annealing furnaces, and LEV hoods at entry and exit points;

(4) For swaging operations, install LEV on the cutting head;

(5) For drawing, straightening, and extruding operations, install LEV at entry and exit points; and

(6) For all metal forming operations, install mechanical ventilation (make-up air) for processing areas.

Primary Beryllium Production; Copper Rolling, Drawing, and Extruding; Fabrication of Beryllium Alloy Products

Welding

For fixed welding operations:

(1) Enclose work locations around the source of fume generation and use local exhaust ventilation; and

(2) Install close capture hood enclosure designed so as to minimize fume emission from the enclosure welding operation.

Primary Beryllium Production; Fabrication of Beryllium Alloy Products; Welding