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<br />SECTION 00671 <br />CHANGE ORDER <br /> <br />(Instruction on reverse side) <br /> <br />NO.1 <br /> <br />PROJECT: WWTP Primary Digester Improvements <br /> <br />DATE OF ISSUANCE: Dec~mber 8,2004 <br /> <br />OWNER: City of Elk River <br />13065 Orono Parkway <br />Elk River, MN 55330 <br /> <br />OWNER's Project No.: 8225pOJ <br /> <br />CONTRACTOR: Municipal Builders, Inc. <br />17125 Roanoke Street NW <br />Anoka, MN 55304 <br />CONTRACT FOR: WWTP Primary Digester <br />Improvements <br /> <br />ENGINEER: Howard R. Grel1m Company <br />2550 UniversityiAve West, <br />Suite 400N <br />St. Paul, MN 515114 <br />ENGINEER's Project No.: 8~2550J <br /> <br />You are directed to make the following changes in the Contract Documents. <br />Description: <br />1. Eliminate 6" swing-flex check valves (typ 2) on mixing pumps shown in Detail A/P-2. <br />Eliminate 6" swing-flex check valves (typ. 2) added to recirculation pump by <br />Addendum NO.1 as shown in Details 3/P-3 and B/P-3. <br />2. Add sealant as shown on Detail A from Environdyne Drawing No. 700-B-47980 <br />and per attached Sheet CO-2. <br />3. Revise temporary piping for heating secondary digester including wet tap off of mixing <br />ump discharge to secondary digester. <br />4. Replace existing Varec gas valve on gas piping above cover. <br />5. Deduct for not repairing digester wall penetrations into digester building. <br />6. Deduct for replacement of piping and fitting inside digester as directed. <br />Replace stainless steel bolts not previously replaced on fittings. <br />Add 6" diameter by 1'-6" pipe extension on lower overflow pipe. <br />7. Additional concrete repair around top of tank due to cover shifting. <br />8. Additional labor to jack up cover and prepare for removal. <br />9. Add the following to Digester Building motor control center (MCC): <br /> <br />($ -2,658.00) <br /> <br />$ 11,720.00 <br /> <br />$ 2,704.00 <br />$ 995.00 <br />($ -4,770.00) <br /> <br />($ -3,033.00) <br />$ 5,015.00 <br />$ 3,914.00 <br />$ 5,174.00 <br /> <br />1.1. One (1) new full voltage reversing size 1 starter (FVR-1) in MCC unit 3A for the Digester Sludge <br />Pump. Because a reversing starter is taller than a non-reversing starter, a new ~oor will also be <br />required. The new door should include the following control devices: HAND-OIt'F-AUTO selector <br />switch, FORWARD/REVERSE selector switch, green RUN indicator lamp (LEDitype), and red <br />STOPPED indicator lamp (LED type). <br />1.2. One (1) new 15 amp breaker and door in MCC unit 4T for the Boiler Supply Fan. Since this is only a <br />breaker, no door mounted control devices are required. <br />1.3. Four (4) new HAND-OFF-AUTO selector switches on the doors of MCC units 1A, 1 E, 2A, and 2E. <br />1.4. Four (4) new red STOPPED indicator lamps (LED type) on the doors of MCC urnits 1A, 1 E, 2A, and <br />2E. <br /> <br />10. Add 6" Butterfly valve with wafer on overflow piping; replace existing 12" plug valve <br />between existing mixing pump inlet and primary digester. <br />11. Eliminate caulking along exterior welds of digester cover. Eliminate caulking around <br />perimeter of digester cover. <br />12. Build wood transition from welded digester cover to digester gallery roof to allow <br />water to flow onto roof. Add rubber paver material to flat "step" areas and add <br />blocking under hatch. <br /> <br />$ 3,235.00 <br /> <br />($ -2,350.00) <br /> <br />$ 1,668.00 <br />