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TFCHNOIOGY FOR TANKS <br />AND THEIR,ENVIRONMENT <br />S-04 CUST. <br />r-+ •Ir! <br />0 Pre-Test <br />Qualification <br />Procedure <br />product1. If the tank 60% or more than <br />90% <br />1 <br />capacity,. Do not test without specific instructions from Houston <br />Quality Control. <br />11. Safety check for tank bottom pressure diferential. <br />1 Enter tank diameter (A) a a a in. <br />2. Enter Tank Top to Surface Distance (B) C.S'/ In. <br />3. Calculate tank bottom to surface (A+B) = (C) _ I:I!Q � in. <br />4. Enter water table distance from surface (D) .xLk'Uj E:a E In. <br />5. Subtract water table (D) from tank bottom (C) <br />to obtain (E) j /w- In. <br />water6. Calculate :. pressure at tank bottom <br />0.0 .. y <br />7. To obtain tank bottom pressure differential (G), ,DD water _ <br />pressure (F) and the probe set point (1.2 for steel or 0.5 for fiberglass tanks <br />r <br />instructionsTotal diferential equals (G) p - <br />If total diferential (G) exceeds 4.00 psi DO NOT TE <br />without special • i <br />Control. <br />sl nn+u <br />:E1 <br />TANKNOLOGY CORPORATION INTERNATIONAL <br />5225 Hollister St. • Houston, Texas 77040-6294 - (713) 690-8265 • 1 (800) 888-8563 - Fax: (713) 690=2255 <br />