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California State Water Resources Control Board (February 6 , 1992) <br /> Horner Creative Products <br /> Horner Ezy-Chek II (Underfilled Test) <br /> UST TIGHTNESS TEST METHOD <br /> Threshold: 0 . 05 gallon per hour (Pa=95. 790 ; PF,=4 . 21%) <br /> .Applicability: gasoline, diesel, aviation fuel , fuel oil 1#4 , or <br /> others; <br /> Capacity: the maximum UST capacity shall be 8 , 000 gallons ; <br /> the UST must be between 98 to 100 percent full ; <br /> the UST being tested must have an overfill <br /> prevention system to prevent filling the tank <br /> beyond 95% full; <br /> 4 <br /> Waiting Time: minimum waiting time between delivery and test data <br /> collection shall be eight (8) hours ; <br /> Test Period: minimum data collection time shall be one hour and <br /> forty minutes (33 minutes monitor mode and 67 <br /> minutes test mode) ; <br /> the test data shall be acquired and recorded by a <br /> computer; <br /> leak rate calculated from data of last 67 minutes <br /> of test period; <br /> Ground Water: ground water depth must be determined and if the <br /> water table is above the bottom of the UST, the <br /> test procedure compensating for its presence must <br /> be used. <br /> Calibration: load cell must be calibrated before each use. <br /> Horner Creative Products Evaluator: W. A. Kibbe & Associates <br /> 212 Morton Street <br /> Bay City, MI 48706 <br /> Tel : (51.7) 893-3360 State Review Completed: 01-10-91 <br /> 25 <br />