ACS OPERASE AN ORGANIC CHEMICAL PLANT IN GRIFFITH , LAKE COUNTY,INDIANA. THE FACILITY, LOCATED IN THE NDIN, IS AN INDUSTRIAL USER OFTHE HAMMOND SANITARY DISTRICT. REGION 5 HAS DOCUMENTED VIOLATIONS OF ACS'S IU PERMIT ISSUED BY HSD. IN ADDITION, THE ACS FACILITY IS SUBJECT TO FEDERAL CATEGORICALPRETREATMENT STANDARDS FOR ORGANIC CHEMICALS, PLASTICS, AND SYNTHETICFIBERS POINT SOURCE CATEGORY UNDER 40 CFR PART 414. REGION 5 HASSIMILARLY DOCUMENTED VIOLATIONS OF THE OCPSF REGULATIONS ATTENDANT WITHTHE DAY-TO-DAY OPERATIONS OF THE ACS FACILITY. REGION 5 HAS REVIEWED DATA GENERATED BY ACS ITSELF AS WELL AS DATAGENERATED BY HSD IN ASSEMBLING THIS CASE AND DOCUMENTING THESEVIOLATIONS. THE REFERRAL SUGGESTS THAT THE INSTALLATION OF ADDITIONALPRETREATMENT EQUIPMENT MAY BE NECESSARY TO BRING ACS INTO COMPLIANCEWITH ITS HSD-ISSUED IU PERMIT AND THE FEDERAL REGULATIONS. AMERICAN CHEMICAL SERVICE, INC. (ACS) OPERATES A SPECIALTY ORGANICCHEMICAL PLANT IN GRIFFITH, LAKE COUNTY, INDIANA. ACS'S GRIFFFITHFACILITY DISCHARGES WASTEWATERS TO THE SEWER SYSTEM OF THE HAMMONDSANITARY DISTRICT, AND IS PERMITTED, REGULATED AND CONTROLLED THROUGHHSD'S INDUSTRIAL PRETREATMENT PROGRAM. ADDITIONALLY, THE FACILITY ISSUBJECT TO FEDERAL CATEGORICAL PRETREATMENT STANDRDS FOR THE ORGANICCHEMICALS, PLASTICS, AND SYNTHEC