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<br />----..--. ----- <br />I <br />.. Page 5 <br /> City of Arden Hills, Minnesota <br /> AEC Project No. MN 1410 <br />. <br />. Level (HWL) . See photos 9 through 15. This <br /> work will require approximately 60 man hours. <br />. 2.1.6 Remove the interior ladder on the dry well tube. <br />- It has been ice damaged and is severely corroded <br /> in several critical locations. See photos 16, <br />" 17 and 18. <br />. 2.1. 7 Replace the two (2) , 20 and 24 inch round <br /> manhole gaskets. One is in the tank bowl area <br /> (20 inch diameter in the drywell access tube) <br />. and the other is in the bottom of the wet riser. <br />.. See photos 19 and 20. <br /> 2.1.8 Seal weld approximately three (3) lapped seams <br />. on the interior of the wet riser. This is <br /> required by the AWWA DI00 Standard. <br />. <br /> 2.1.9 Install two (2) vapor-proof lights in the tower <br />. dry well tube interior. Place the wiring in <br /> code approved conduit. The current lighting <br />. system does not illuminate the interior of the <br /> dry well access tube. See photo 19. <br /> Consideration should be given to upgrading the <br />. current 60 amp electric service to 100 amp <br /> service and adding sufficient circuits and <br />. outlets to provide power for maintenance and <br /> reconditioning. <br />I. <br />. <br />. <br />