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<br />Page 1 of3 <br /> <br />Rick Hoganson <br /> <br />From: David P. Obermiller [daveo@obernel.com] <br />Sent: Thursday, October 16, 2008 7:35 AM <br />To: Rick Hoganson <br />Subject: FW: JAIL GENERATOR STACK <br />Attachments: IMG_0469.JPG; IMG_0468.JPG <br /> <br />Rick, <br /> <br />I stopped by the Jail and looked at the Generator stack. I think raising the stack by 13 feet is a reasonable <br />distance and reduce the potential of generator combustion fumes from entering the buildings outside air Intakes. It <br />must be kept in mind however that wind and building configurations are difficult if not impossible to completely <br />understand so there may still be a periodic potential with just the right wind speed and direction for problems. <br />However in our opinion the potential Is greatly reduced by the extension. <br /> <br />Attached are two pictures of the existing generator stack that Grant had forwarded to us. <br /> <br />David Obermiller, PE <br />Project Mechanical Engineer <br />OBERMILLER NELSON ENGINEERING <br />701-280-0500 <br />Cell 701-371-5370 <br /> <br />-----Orfglnal Message----- <br />From: Grant Johnson [mallto:gejohnson@grantsmechanlcal.com] <br />Sent: Thursday, October 09,2008 11:36 AM <br />To: daveo@obemel.com <br />Subject: Re: JAIL GENERATOR STACK <br /> <br />Dave: <br />I have left with my wife to spend the profits from the Vets Home project. So today or tomorrow won't work. Please <br />find attached to photos I took from ground level. Also I was on site with Gene Gartner and took measurements. <br />The stack discharge is about level with intake to the SE AHU recently installed. Also to the NE is another Intake <br />hood serving the 2nd recently installed AHU. My proposal is to extend the stack vertically approximately 13 ft. We <br />will be guying the stack from the walls at a distance of approximately 8-10 ft below the stack termination. I will <br />also provide for additional supports in the generator room to carry the extra loading. My proposal also Includes <br />extending the generator crankcase breather vents above the existing fresh air Intakes. These are the 2 rusty black <br />iron pipes. Added extension will not affect exhaust back pressure for the 16M diameter stack. <br /> <br />I have coordinated the extension with John Backland of Adams Inc. the original supplier of the Selkirk <br />Metalbestos "IPS" stack. <br /> <br />Please see attachments: <br /> <br />Grant EJohnson, PE <br />President <br />Phone: (701)-232-8891 <br />Fax: (701)-237-4711 <br />Cell (701)-866-6550 <br /> <br />1- Original,Message -- <br />From: David P. Obermiller <br /> <br />10/17/2008 <br /> <br />~. <br />