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r�1 <br />L_J <br />n <br />0 0 <br />Stockton Nissan Waste Antifreeze Storage Tank <br />Secondary Containment Calculation <br />Secondary Containment Volume <br />length width height <br />312 153 <br />less volumes lost by interferences <br />volume gallons <br />5 1033 <br />tank 1 <br />53 <br />37 <br />2.5 <br />21 <br />tank 2 <br />53 <br />37 <br />2-5 <br />21 <br />tank 3 <br />74 <br />48 <br />2.5 <br />38 <br />tank 4 <br />110 <br />46 <br />2.5 <br />55 <br />berm 1 <br />24 <br />24 <br />5 <br />12 <br />total loss <br />148 <br />Net Secondary Containment <br />885 <br />Tank Volume <br />490 <br />Percent Containment 181 <br />Design of tank: <br />The tank is a 490 gallon polyethylene cylindrical tank mounted vertically. The <br />tank is secured to the concrete floor by three %z" anchor bolts. The tank is fitted <br />overfill protection which alarms if the tank's contents reach 90 percent of the tank <br />volume. The tank is translucent allowing the direct viewing of the liquid depth in <br />the tank. The overfill protection was tested and were found to be in good working <br />condition and properly calibrated. The tank was inspected internally and <br />externally a was found free of leaks, cracked welds and scrapes. The <br />polyethylene tank is uncoated. The polyethylene is compatible with waste <br />antifreeze. The tank's exterior is natural polyethylene and is free of any scrapes <br />or nicks. Inspection of the secondary containment free on any signs of leakage. <br />The concrete floor is in good condition and free of any major cracking. The tanks <br />piping is 1" copper pipe with brazed connections. The tank system has two air <br />operated diaphragm pumps for pumping antifreeze from the collection station to <br />the tank, Inspection of the pumps and plumbing did not show any signs of <br />leakage. The piping is well supported and meets the criteria of ASME B31.3. for <br />process piping. <br />Secondary Containment findings: The secondary containment system of <br />sufficient capacity and condition for the containment of releases from all ks <br />and ancillary equipment. Initials: <br />Stockton Nissan Waste Antifreeze Storage Tank <br />