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May 2, 2012 <br />Chevron <br />22888 Kasson Rd. <br />Banta, CA <br />?age 47 of 179 <br />FEB 2 5 2016 <br />ENV6R " �A.ENTAL <br />Attn: Zach Pecor HFs!7r!urNPP4.RTYFNT <br />The following repairs were conducted on tank T-23 at the Chevron facility located in Banta, CA. <br />3/28/12 <br />• Mark -out new 24" manway for sandblasting <br />3125112 & 3/30112 <br />Install new 24" manway <br />4112/12 <br />• install (5) square 114" 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 14' 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 protect. <br />Regards, <br />Austin Moreau <br />Project Manager <br />Matrix Service, Inc. <br />