BETWEEN 4/6/88, AND 12/20/90, ONE OF KERR-MC GEE CHEMICAL CORP'S FOUR CREOSOTE TREATMENT CYLINDERS AT KERR-MC GEE'S MADISON, IL, WOOD PRESERVING FACILITY REPEATEDLY VIOLATED THE 8 LBS PER HR EMISSION LIMITATION FOR VOLATILE ORGANIC COMPOUNDS (VOC) SET FORTH IN IPCB RULE 205F, A PART OF THE SIP.