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0.05 <br />0.1 <br />0.15 <br />0.2 <br />Tank 1 Tank 3 Tank 4 Tank 5 Tank 6 Tank 7 Tank 8 Tank 9 Tank 10/11 Tank 12UT's (inches)Tank Shell <br />UT Thickness Range <br />Shell Design Thickness <br />Single Wall <550 Gal. <br />UL-142 <br />Max Thickness <br />Top 25-50% <br />Botton 50-75% <br />Min Thickness <br />Shell Design <br />UL-SU2258 <br />Shell Design Thickness <br />Double Wall DIa. >76" <br />UL-2085 <br />Tank 1 Tank 3 Tank 4 Tank 5 Tank 6 Tank 7 Tank 8 Tank 9 Tank 10/11 Tank 12 <br />Ave (in)0.076 0.107 0.108 0.107 0.107 0.107 0.186 0.184 0.185 0.184 <br />Min (in)0.072 0.104 0.104 0.103 0.103 0.105 0.182 0.181 0.181 0.181 <br />% Ave Design 108% 98% 99% 98% 98% 98% 99% 110% 111% 110% <br />% Min Design 103% 95% 95% 94% 94% 96% 97% 97% 97% 97% <br />Re-test (years)10.0 5.0 5.0 5.0 5.0 5.0 10.0 FAIL 10.0 10.0