png AER,BC,BCPOM,DMS,DUST,METEO,POM,SO2,SO4,SS AERH2O,AERH2OD,AVE,BUD,CCFD,CHEP,CONC1000,CONC500,CONCZON,DAERH2O,DRY,EC550ZON,EMI,EMICHEP,ER3D1000,ER3D500,ERD,ERGT053D1000,ERGT053D500,ERGT05D,ERLT053D1000,ERLT053D500,LOAD,LOAD05D,LOAD125D,LOADCOAD,LOADD,MEC550,OD550,OD550D,PREC,RH1000,RH500,RHOPTD,SCONCD,SED,SEDDRY,TUR,WET an1996,an1997,an2000,an2001 mALLYEAR ps