sec ution ▁for ▁six ▁years . ▁The ▁fine ▁was , ▁however , ▁jud ged ▁excess ive ▁by ▁the ▁Court ▁of ▁App e al ▁and ▁so ▁reduced ▁to ▁£ 5 0 , 0 0 0 . ▁In ▁April ▁ 2 0 0 7 , ▁CE ME X ▁announced ▁that ▁it ▁had ▁installed ▁a ▁£ 6 . 5 ▁million ▁dust ▁ab at ement ▁system ▁at ▁the ▁same ▁works ▁in ▁Rugby , ▁which ▁had ▁cut ▁partic ulate ▁em issions ▁by ▁ 8 0 %. ▁The ▁site ▁comes ▁under ▁the ▁aus p ices ▁of ▁the ▁EU ▁W aste ▁Inc iner ation ▁Direct ive ▁as ▁it ▁burn s ▁waste ▁ty res ▁for ▁fuel . ▁There ▁are ▁concerns ▁over ▁the ▁impact ▁on ▁both ▁the ▁environment ▁and ▁human ▁health ▁from ▁this ▁practice , ▁although ▁it ▁is ▁common ▁practice ▁in ▁many ▁c ement ▁works . ▁ ▁During ▁tests ▁conducted ▁from ▁June ▁ 1 0 ▁to ▁August ▁ 5 , ▁ 2 0 0 8 , ▁the ▁Mon ter ey ▁Bay ▁( Cal iforn ia ) ▁Un ified ▁Air ▁Pol l ution ▁Control ▁District ▁reported ▁high ▁levels ▁of ▁chrom ium ▁VI , ▁also ▁known ▁as ▁hex aval ent ▁chrom ium , ▁a ▁cancer ▁causing ▁chemical ▁agent , ▁at ▁an ▁elementary ▁school ▁and ▁fire ▁department ▁in ▁D aven port , ▁California . ▁Ch rom ium ▁VI ▁is ▁the ▁cont amin ant ▁that ▁inspired ▁the ▁movie , ▁Er in ▁Bro ck ov ich . ▁The ▁to xic ▁subst ance ▁apparently ▁origin ated ▁from ▁dust ▁em itted ▁by ▁the ▁C em ex ▁C ement ▁plant