NAC445B.3651. Identification of technologies that constitute presumptive NvMACT.

The technologies to control mercury emissions which are set forth in this section by the associated system or process unit of the tier-1 thermal unit that emits mercury, and none other, are presumptive NvMACT:

     1. For Goldstrike Mining Operations of Barrick Gold Corporation:

SYSTEM OR PROCESS UNITS OF TIER-1 THERMAL UNITS THAT EMIT MERCURY	TECHNOLOGIES FOR CONTROL OF MERCURY EMISSIONS
Ore roasting circuits	Gas quenching, wet gas condenser, wet electrostatic precipitator, mercury adsorption tower
Carbon reactivation kiln, unit 2 (Drum)	Wet venturi scrubber, sulfur-impregnated carbon filtration unit
Autoclave circuits (Units 1, 2, 2-3, 4 and 5-6)	Four wet venturi scrubbers (Units 1, 2-3, 4 and 5-6)
Retorts	Mercury condensers and scrubbers with carbon filtration canisters
Retort room exhaust	Sulfur-impregnated carbon scrubber unit (Stack combined with retort stack)
Electric induction furnaces	Cyclone and baghouse, sulfur-impregnated carbon filtration scrubber unit
Electrowinning cells	Sulfur-impregnated carbon filtration scrubber unit (Stack combined with electrowinning furnace)

     2. For Newmont Mining Corporation:

     (a) For the Gold Quarry Operations Area:

SYSTEM OR PROCESS UNITS OF TIER-1 THERMAL UNITS THAT EMIT MERCURY	TECHNOLOGIES FOR CONTROL OF MERCURY EMISSIONS
North and south CFB ore preheaters	Baghouses, SO2 scrubber
North and south CFB ore roasters	Roaster off-gas quench, wet scrubber, electrostatic precipitator, wash tower, SO2 scrubber, mercurous chloride scrubber
Carbon regeneration kilns, 1 and 2 (Drum)	Carbon adsorption unit, wet scrubber
Mercury retort furnaces	Carbon filter pack
Electric induction furnaces	Carbon filter pack, baghouse
Pregnant and barren solution tanks	Carbon adsorption unit, wet scrubber

     (b) For the Twin Creeks Mine:

SYSTEM OR PROCESS UNITS OF TIER-1 THERMAL UNITS THAT EMIT MERCURY	TECHNOLOGIES FOR CONTROL OF MERCURY EMISSIONS
Juniper mill carbon kiln (Drum)	Wet scrubber, mercury scrubber
Pinon mill carbon regeneration kiln (Drum)	Wet scrubber
Sage mill autoclaves	Venturi scrubber
Mercury retort furnaces	Carbon adsorption
Juniper induction furnaces	Baghouse

     3. For the Pipeline Mining Operation of Cortez Gold Mines of Placer Dome, Inc.:

SYSTEM OR PROCESS UNITS OF TIER-1 THERMAL UNITS THAT EMIT MERCURY	TECHNOLOGIES FOR CONTROL OF MERCURY EMISSIONS
Electric carbon reactivation kilns, 1 and 2	Chemical treatment, added wet scrubber 10/05
Electric induction refinery furnaces, 1 and 2	Chemical treatment, baghouse
Electrowinning cells	Chemical treatment

     4. For the Jerritt Canyon Mine of Queenstake Resources, Ltd.:

SYSTEM OR PROCESS UNITS OF TIER-1 THERMAL UNITS THAT EMIT MERCURY	TECHNOLOGIES FOR CONTROL OF MERCURY EMISSIONS
East and west roasters	Gas quench scrubber, venturi dust scrubber, SO2 scrubber, mercury scrubber, tail gas scrubber, sodium hypochlorite injection system
Refinery and carbon regeneration kiln	Venturi mercury wet-scrubbing/carbon-polishing system

     (Added to NAC by Environmental Comm’n by R189-05, eff. 5-4-2006)