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11 *q1:94 <br />S.O.#LAI� CUST. �,,YMWW ��06� Faculty # <br />I. If the tank product level is less than 60% or more than 90% of tank <br />capacity,. Do not test without specific instructions from Houston <br />Quality Control. <br />ll. Safety check for tank bottom pressure diferential.l.� <br />1 Enter tank diameter A `I <br />2. Enter Tank Top to Surface Distance (B) <br />M <br />in. <br />3. Calculate tank bottom to surface (A+B) - (C) '� In. <br />4. Enter water table distance from surface (D)�.' i �t-W. in. <br />5. Subtract water table (D) from tank bottom (C) <br />to obtain (E) In. <br />6. Calculate water bead pressure at tank bottom . <br />(E) x 0.036psi - (F) CS� psi. <br />7. To obtain tank bottom pressure differential (G), ADD water head <br />pressure (F) and the probe set point (1.2 for steel or 0.5 r fiberglass tanks). <br />(F) + 1.2 = (G) or (F) + 0.5 = (G) <br />Total deferential equals (G) �� psi <br />If total diferential (G) exceeds 4.00 psi DO NOT TEST <br />without special instructions from Houston Quality <br />Control. <br />Surf mr_A <br />Top of water table <br />A 11111 A1 <br />PEI= <br />TANKNOLOGY CORPORATION INTERNATIONAL <br />TAK-24 r,"r, Wm'1;ctpr qt . Nnnctnn Tavac 77nA1)-R9QA . (7131 ROn_R9rr. . 1 MM RRR_orF3 . Pqy! (713) 690-2255 <br />