EMISSION RATE TESTING OF VOLATILE AND SOME SEMI-VOLATILE COMPOUNDS (VOC/SVOC) WAS CONDUCTED AT A LICENSED COMMERCIAL EMISSION RATES. MEASUREMENTS WERE MADE USING SURFACE ISOLATION FLUX CHAMBER. HYDROCARBON SAMPLES WERE COLLECTED IN EVACUATED STAINLESS STEEL CANISTERS AND ANALYZED OFF-SITE BY GAS CHROMATOGRAPHY AND MASS SPECTROMETRY (GC/MS). THE TESTING PROTOCOL THAT WAS USED FOR THIS PROGRAM HAS BEEN USED IN THE PAST TO ESTABLISH THE CONTROL STRATEGIES TO VOC/SVOC EMISSIONS CONTROL FROM WASTE/HAZARDOUS WASTE MATERIALS. THE TESTING PROTOCOL INCLUDED THE USE OF THE EPA RECOMMENDED SURFACE EMISSION ISOLATION FLUX CHAMBER TECHNOLOGY AND THE EPA METHOD TO-14 CANISTER SAMPLE COLLECTION AND GC/MS ANALYTICAL TECHNIQUE. FLUX CHAMBER, SWEEP AIR, SAMPLE COLLECTION EQUIPMENT, AND FIELD DOCUMENTS WERE LOCATED ON-SITE AND AT THE TEST LOCATION. THE CHAMBER WAS PLACED ON THE TESTING SURFACE (UNCONTROLLED WASTEWATER LAYER). THE THERMOCOUPLES WERE PLACED IN ORDER TO MONITOR AIR TEMPERATURE INSIDE AND OUTSIDE OF THE CHAMBER. THE CHAMBER WAS SUSPENDED FROM A PORTABLE TRIPOD TO PREVENT DISTURBANCE OF THE LAYER. THE SWEEP AIR FLOW RATE WAS INITIATED AND THE ROTAMETER WAS SET AT 5.0 LITERS PER MINUTE. CONSTANT SWEEP AIR FLOW RATE WAS MAINTAINED THROUGHOUT THE MEASUREMENT. THE CHAMBER WAS OPERATED AT 5.0 LITERS PER MINUTE SWEEP AIR FLOW RATE, AND DATA WERE RECORDED EVERY RESIDENCE TIME (6 MINUTES) FOR FIVE RESIDENCE TIMES OR 30 MINUTES. THE SAMPLES CONNECTED TO GC/MS IN LINE AND ANALYZED IN TIME TO OVERCOME TRANSFERRING ERRORS. THESE PROCESS REPEATED TO VALIDATE THE DATA AND REPEATABILITY EVALUATION. RESULTS SHOWED THAT THIS METHOD IS A VERY RELIABLE AND ACCURATE FOR SAMPLING OF VOC/SVOCS FROM OPEN AREA SOURCES.