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TECHNOLOGY FOR TANKS <br />AND THEIR ENVIRONMENT <br />Pre -Test <br />Qualification <br />Procedure <br />.O.# � 6 � C T. N ��� v (�� � chit, Q"A 1Qp I� <br />1. If the tank product level Is less than 60% or more than 90% of tan'.,� <br />capacity,. Do not. • Instructions .Houston <br />luality Control. <br />diameter11. Safety check for tank bottom pressure dtfarential. <br />1 Enter tank <br />2. Enter Tank • • to Surface Distance:' <br />� � 1 In. <br />4. Enter water table distance <br />rte. <br />S. Subtract water table (D) from tank bottom (C) <br />to f • <br />6. Calculate water head pressure at tank bottom <br />7. To obtain bottom pressure differential %water head <br />pressure (F) and the probe set point (1.2 for steel or 0.5 for fiberglass tanks). <br />or • <br />Total diferential equals `• <br />If •, •exceeds 4.00 psi DO NOT TEST <br />withoutiinstructions! Houston <br />Control. <br />411111411 <br />= <br />:•rtlr•yWNIPE <br />- <br />TAK-24 <br />TANKNOLOGY CORPORATION INTERNATIONAL <br />5225 Hollister St. • Houston, Texas 77040-6294 • (713) 690-8265 9 1 (800) 888-8563 • Fax: (713) 690-2255 <br />