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California Edition:June 1999 <br /> Veeder-Root <br /> TLS-200/200i/250/250i/300/300c/300i/300pc/350/350pc/350r/350rpc UST ATGS <br /> (8473 Digital Sensing Magnetostrictive Probe) _ <br /> AUTOMATIC TANK GAUGING SYSTEM <br /> Certification: Leak rate of 0.2 gph with PD--99%and PFA=O 1% <br /> Leak Threshold: 0.093 gph.A system should not be declared tight if the test result indicates a loss or <br /> gain.that equals or exceeds this threshold. <br /> Applicability: Gasoline,diesel,aviation fuel,and solvents. <br /> Tank Capacity: Maximum of 15,000 gallons. - <br /> Tank must be between 50 and 95%full. <br /> Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing. <br /> Minimum of 30 minutes between dispensing and testing. <br /> There must be no delivery during waiting time. <br /> Test Period: Minimum of 2 hours. <br /> Test data are acquired and recorded by the system's computer. <br /> Leak rate is calculated from the difference between the first and last data collected. <br /> There must be no dispensing during test. <br /> Temperature: Average for product is determined by a minimum of 5 thermistors. <br /> Water Sensor: Must be used to detect water ingress. <br /> Minimum detectable water level in the tank is 0.544 inch. <br /> Minimum detectable change in water level is 0.027 inch. <br /> Calibration: Thermistors and probe must be checked and calibrated in accordance with <br /> manufacturer's instructions. <br /> Comments: Not evaluated using manifold tank systems. <br /> Tests only portion of tank containing product. <br /> As product level is lowered,leak rate in a leaking tank decreases(due to <br /> lower head pressure). Consistent testing at low levels could allow a leak to remain <br /> undetected. <br /> EPA leak detection regulations require testing of the portion of the tank system which <br /> routinely contains product. <br /> Caliroinia regulations require at least one test per month after <br /> routine product delivery or when the tank is filled to within 10% of <br /> the highest operating level during the previous month. <br /> Veeder-Root Evaluator:Midwest Research Institute <br /> 125 Powder Forest Dr. Tel:(816)753-7600 <br /> Simsbury,CT 06070-2003 <br /> Tel: (860)651-2700 Date of Evaluation:05/14/93 <br /> Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the performance of the <br /> method or equipment. Equipment should be installed and operated in accordance with all applicable laws and regulations. <br /> 314 <br />