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0 <br />Chase Chevrolet Waste Oil & Waste Antifreeze Tank Assessment (2010) <br />Volume calculation(s) <br />The secondary containment is provided by a steel dike 96" x 48" x 30" high, <br />having a volume of 598 gallons. Secondary containment volume is lost by the <br />displacement by the waste antifreeze tank. The loss is 147 gallons. The <br />remaining secondary containment volume is 450 gallons. The waste oil tank has <br />a volume of 566 gallons, which is greater than the effective secondary <br />containment volume. Thus the containment is too small for the current tank <br />configuration. The containment is under roof so the 25 year rain event does not <br />apply. <br />Revised Secondary Containment Calculation after reconfiguration. <br />Dike: 96" x 48" x 30" / 231 "/gal = 598 gallons <br />Largest Tank: 38" x 38" x 60" x .785 x .9 / 231 = 265 gallons <br />Volume lost to displacement: 30" x 31" x 30" / 231 in3/gal = 121 gallons <br />Net containment = 598 -121 = 477 gallons <br />Under roof 25 year rain does not apply <br />Containment is sufficient <br />Visual inspection of containment area: <br />The containment for the piping and pumps were found to be dry with no evidence <br />of leaks. Visual inspection of the secondary containment found it dry and the <br />concrete around the secondary containment was dry with no evidence of leaks. <br />Figure 17 <br />Secondary Containment is dry. <br />Strandberg Associates 1(866) 388-0404 (650) 329-8918 rwatergLfyarwaterquV, om 26 <br />