RESPONDENT STORED HAZARDOUS SUBSTANCES IN EXCESS OF 90 DAYS AND FAILED TO MEET THE PERMIT EXEMPTION PREREQUISITES. VIOLATIONS OF RCRA SUBTITLE C AND OF THE FEDERALLY-AUTHORIZED PENNSYLVANIA HAZARDOUS WASTE REGULATIONS. VIOLATIONS INCLUDED: (1) OPERATING A HAZARDOUS WASTE STORAGE FACILITY WITHOUT A PERMIT OR INTERIM STATUS, (2) FAILURE TO KEEP CONTAINERS CLOSED WHEN NOT ADDING OR REMOVING WASTE, (3) FAILURE TO CONDUCT WEEKLY INSPECTIONS, (4) FAILURE TO ADQUATELY TRAIN ALL FACILITY PERSONNEL INVOLVED IN THE MANAGEMENT OF HAZARDOUS WASTE, AND (5) FAILURE TO STORE CONTAINERS OF HAZARDOUS WASTE IN A PROPER CONFIGURATION WITH AISLE SPACING TO ALLOW FOR INSPECTIONS AND EMERGENCY RESPONSE.