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Are the temperature an vel sensors calibrated before eac t? <br />( ) yes <br />(X) no <br />If not, how frequently are the sensors calibrated? <br />( ) weekly <br />( ) monthly <br />( ) yearly or less frequently <br />(X) never (factory calibrated) <br />> Interpreting test results <br />How are level changes converted to volume changes (i.e., how is height -to -volume <br />conversion factor determined)? <br />() actual level changes observed when known volume is added or removed (e.g., <br />liquid metal bar) <br />( ) theoretical ratio calculated from tank geometry' <br />(X) interpolation from tank manufacturer's chart <br />( ) other (describe briefly) <br />( ) not applicable; volume measured directly <br />How is the coefficient of thermal expansion (Ce) of the product determined? <br />( ) actual sample taken for each test and Ce determined from specific gravity <br />() value supplied by vendor of product <br />(X) average value for type of product <br />( ) other (describe briefly) <br />How is the leak rate (gallon per hour) calculated? <br />( ) average of subsets of all data collected <br />( ) difference between first and last data collected <br />( ) from data from last hours of test period <br />(X) from data determined to be valid by statistical analysis <br />( ) other (describe) <br />ATGS - Description Page 5 of 6 <br />