0 0 ▁million ▁worth ▁of ▁scr ub bers ▁on ▁the ▁plant , ▁which ▁were ▁purchased ▁from ▁A BB ▁Environment al ▁Systems . ▁Between ▁ 2 0 1 0 ▁and ▁ 2 0 1 2 , ▁the ▁Central ia ▁Power ▁Plant ▁has ▁been ▁off line ▁for ▁an ▁average ▁of ▁ 4 ▁months ▁of ▁each ▁year . ▁In ▁March ▁ 2 0 0 9 , ▁a ▁proposed ▁agreement ▁between ▁Trans Al ta ▁and ▁the ▁Washington ▁State ▁Department ▁of ▁E col ogy ▁was ▁announced , ▁regarding ▁a ▁significant ▁step ▁forward ▁in ▁impro ving ▁air ▁quality ▁in ▁Washington . ▁Key ▁to ▁the ▁agreement ▁is ▁Trans Al ta ' s ▁willing ness ▁to ▁volunt arily ▁reduce ▁mer cur y ▁em issions ▁by ▁at ▁least ▁ 5 0 ▁percent ▁by ▁ 2 0 1 2 ▁to ▁address ▁air ▁quality ▁concerns ▁in ▁the ▁region . ▁Capt ure ▁testing ▁took ▁place ▁in ▁ 2 0 0 9 ▁and ▁an ▁activ ated ▁injection ▁product ▁was ▁selected . ▁The ▁process ▁will ▁cost ▁US $ 2 0 ▁to ▁$ 3 0 ▁million ▁over ▁the ▁next ▁several ▁years . ▁Additionally , ▁continuous ▁em issions ▁monitoring ▁systems ▁( CE MS ) ▁for ▁mer cur y ▁measurement ▁was ▁cert ified ▁by ▁the ▁Energy ▁& ▁Environment al ▁Research ▁Center ▁( E ER C ). ▁Currently , ▁neither ▁Washington ▁State ▁nor ▁the ▁U . S . ▁federal ▁government ▁has ▁reg ulations ▁in ▁place ▁for ▁mer cur y ▁emission ▁redu ctions . ▁As ▁part ▁of ▁the ▁same ▁agreement ▁between ▁Trans Al ta ▁and ▁the ▁Washington ▁Department ▁of ▁E col ogy