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May 2, 2012 <br />Chevron <br />22838 Kasson Rd. <br />Banta, CA <br />Attn: Zach Pecor <br />Page 47 of 179 <br />FEB 2 5 2016 <br />ENVIRON <br />ME <br />}-ir�.6l T4-� R;:pAPTM!=PIT <br />The following repairs were conducted on tank T-23 at the Chevron facility located in Banta, CA. <br />3128/12 <br />• Mark -out new 24" manway for sandblasting <br />3129/12 & 3130112 <br />Install new 24" manway <br />4112112 <br />• Install (5) square /<" patch plates with rounded corners to cover bottom pitting at the <br />locations specified by DJA Inspection report and vacuum box patches. <br />• Install telltale holes in nozzle repads D and E. (Repad at G was too small to drill hole) <br />• Modify the water draw support for seismic isolation and install 12" dia. x %" reinforcing <br />plate at the base of the support. <br />Nozzle D was a hot tap and failed the repad air test due to lack of welding around the perimeter <br />of the nozzle at the tank interior. <br />4118/12 <br />• Weld the inside perimeter of nozzle D and air test the repad. <br />Thank you for the opportunity to work with you on this project. <br />Regards, <br />Austin Moreau <br />Project Manager <br />Matrix Service, Inc. <br />