Novara Environmental Statement 2007 English MEMC-NO ...

Emissions intothe atmosphereThe productive processes of the siteproduce, as a by-product, vapoursand gasses that collect in the exhaustducts. These are eventually brokendown, according to their typologyand danger level, before they arereleased into the atmosphere.The most important emissions intothe atmosphere are monitored at leastevery three years, as requestedby the latest authorisations obtainedfor the emission points; samplingand analysis are performed by aqualified external laboratory coordinatedby the department for protectionof the environment and safety.The limits foreseen in the authorisationsare complied with for all substances.Samples were taken from the singleflues operating in the most drasticoperating conditions possible for theprocesses determining emissionsand therefore represent the mostcritical situation that could occur,which does not represent the actualsituation in terms of the total annualquantity of pollutants emitted.In fact, during the years in whichthe number of hours of operation ofthe plants is limited, such as 2007,the annual emission value is lower,as shown in the graph showing theTotal emission (t/year)Year2000200120022003200420052006200795,0085,0075,0065,0055,0045,0035,0025,0015,005,00tot (kg/h)3,03893,38343,03522,92202,30873,67552,43801,8468t/annoEmissions into the atmosphereTotal yearly emissionSpecifi c emissionLimit by law (by permit)TOTAL EMISSIONS26,183027,040026,005325,175619,780731,491521,034914,5379total annual amount of emissions tothe atmosphere expressed in tons,which consists of the sum of contributionsfrom all of the pollutantsemitted from flues monitored due totheir importance.t/MSIE0,00303890,00338340,00303520,00292200,00230870,00367550,00243800,0018468t/year tot.authorized88,673188,673188,673188,033688,033688,033688,033690,24992000 2001 2002 2003 2004 2005 2006 2007YEAR0000000000Specifi c emission (t/MSIE)23