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State Water Resources Control Board • Page 1 of 2 <br /> Home »Water Issues >>Programs >>Ust .»Leak Prevention -»Lgl 13 >>Vendors <br /> UST Programs -LG 113 <br /> ...........................I................................................................................................................. <br /> Issue Date:November 22,1995 <br /> Revision Date:October 18,2002 <br /> OPW Fuel Management Systems <br /> (originally listed as Emco Electronics,Tuthill Transfer Systems) <br /> EECO System 1000, 1500,2000,3000 and Galaxy 0.2 gph Precision Test and Quick Test <br /> (Q0400-4xx Magnetostrictive Probe) <br /> AUTOMATIC TANK GAUGING METHOD <br /> Certification Leak rate of 0.2 gph with PD = 99.1%and PFA= 0.9%for Precision Test. Leak rate of 0.2 gph with PD = <br /> 95.4%and PFA=4.6%for Quick Test. <br /> Leak 0.1 gph.A tank system should not be declared tight if the test result indicates a loss or gain that equals or <br /> Threshold exceeds this threshold. <br /> Applicability Gasoline,diesel,aviation fuel,fuel oil #4.Other liquids with known coefficients of expansion and density may <br /> be tested after consultation with the manufacturer. <br /> Tank Capacity Maximum of 15,000 gallons.Tanks less than 95%full may be tested. Minimum product level required based on <br /> tank diameter as follows: <br /> 48"dia/min 8.5"; <br /> 64"dia/min 10.5"; <br /> 72"dia/min 11.5'; <br /> 96"dia/min 14"; <br /> 126"dia/min 18". <br /> For other tank diameters,see evaluation report. <br /> Waiting Time Between delivery and testing ranges from 1 to 6 hours depending on tank conditions. <br /> None between dispensing and testing. <br /> There must be no delivery during waiting time. <br /> Test Period Average of 2 hours,46 minutes during Precision Test evaluation. <br /> Average of 1 hour,9 minutes during Quick Test evaluation. <br /> Test data are acquired and recorded by a microprocessor which automatically determines test time based on <br /> tank size and product level. <br /> There must be no dispensing or delivery during test. <br /> Temperature Probe contains 5 resistance temperature detectors(RTDs)to monitor average product temperature. <br /> At least one RTD must be submerged in product during test. <br /> Water Sensor Must be used to detect water ingress. <br /> Minimum detectable water level in the tank is 0.66 inches. <br /> Minimum detectable change in water level is 0.039 inches. <br /> Calibration RTDs and probe must be checked regularly and, if necessary,calibrated in accordance with manufacturer's <br /> instructions. <br /> Comments Not evaluated using manifolded tank systems.Therefore,this certification is only applicable when there is a <br /> probe used in each tank and the siphon is broken during testing. <br /> Tests only the portion of tank containing product. <br /> As product level is lowered, leak rate in a leaking tank decreases(due to lower head pressure). <br /> Consistent testing at low levels could allow a leak to remain undetected. <br /> EPA leak detection regulations require testing of the portion of the tank which routinely contains product. <br /> California regulations require at least one test per month after routine product delivery or when <br /> http://www.swrcb.ca.gov/water issues/programs/ust/leak_prevention/lgl13/vendors/opw_e... 9/7/2010 <br />