=> SCM CORP IS ENGAGED IN THE MANUFACTURE OF TITANIUM DIOXIDE AT A PLANT IN BALTIMORE, BALTIMORE COUNTY, MD. THIS MANUFACTURING PROCESS INCLUDES ROTARY CALCINING KILNS WHICH GENERATE EMISSIONS OF PARTICULATE MATTER & SULFURIC ACID, AIR POLLUTANTS REGULATED UNDER MARYLAND'S CAA. => THE PARTICULATE MATTER & SULFURIC ACID EMISSIONS FROM 2 OF THE ROTARY CALCINING KILNS WERE SAMPLED ON DEC 5-9 1983. THE RESULTS INDICATED VIOLATIONS OF THE APPLICABLE PARTICULATE MATTER & SULFURIC ACID EMISSION STANDARDS CONTAINED IN THE MD CAA. => SCM'S BALTIMORE, MD PLANT IS LOCATED IN A SECONDARY NONATTAINMENT AREA FOR PARTICULATE MATTER. ALTHOUGH THE EMISSIONS OF PARTICULATE MATTER & SULFURIC ACID GENERATED AT THE THE 2 ROTARY CALCINING KILNS MAY NOT BE THE CAUSE OF THE MONITORED VIOLATIONS OF THE NATIONAL SECONDARY AMBIENT AIR QUALITY STANDARD, THE EMISSIONS MAY CONTRIBUTE TO IT. THE PLANT IS NOT HOWEVER LOCATED IN CLOSE PROXIMITY TO A SIGNIFICANT RESIDENTIAL AREA.