BEMIDJI SCHOOL DISTRICT #31 WAS INSPECTED ON 5/22/90. DOCU- MENTS RECEIVED AFTER THE INSPECTION REVEALED THAT TWIN CITY TESTING CORPORATION DID NOT ANALYZE AIR SAMPLES CORRECTLY IN 3 REMOVAL AREAS AND DID NOT ANALYSE ANY AIR SAMPLES IN ANOTHER REMOVAL AREA. THIS CORPORATION DOES A LOT OF AIR SAMPLING FOR SCHOOLS, SO IT IS IMPORTANT THAT THEY USE PRO- PER TESTING TECHNIQUES.