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5.3 ERMUSR 09-11-2018 Elk River Municipal Utilities UTILITIES COMMISSION MEETING TO: FROM: ERMU Commission Eric Volk— Water Superintendent MEETING DATE: AGENDA ITEM NUMBER: September 11, 2018 5.3 SUBJECT: Auburn Tower Reconditioning Bids ACTION REQUESTED: Award Auburn Tower Reconditioning Bid BACKGROUND: The Auburn Tower was originally constructed and painted in 1993; it had some spot repairs completed in 2014 and 2015. The tower is scheduled to be reconditioned in 2019. We went out for bids early with the expectation that we would receive better than average bids. I have attached the inspection report for reference. DISCUSSION: The bid opening is scheduled for September 10, 2018 at 1:00 p.m. The bid tabulation will be provided at the time of the meeting. FINANCIAL IMPACT: The cost will be presented at the time of the meeting. ATTACHMENT: • 2018 Auburn Tower Inspection Report Page 1 of 1 126 CITY OFF,LKRI�'1 ;R, MN June, 2018 } ti ELEVATED TANK I PECTION REPORT NS 127 500,000 Gallon Spheroid �� ���� ��� �� ������ �� ��V�� � �`��q��� ����� �487 City of Elk River l3O69Orono Parkway, POBox 43O Elk River, MN 55330 Phone:(763)635-1361 Elfering&Associates 10062 Flanders Ct NE Blaine, MN (763)780-0450 Inspected By: Badger State Inspection, LLC P.O. box 157 Osseo, WI 54758 PAG E1 128 TABLE OF CONTENTS 1 .0 PROJECT INFORMATION 3 2.0 EXECUTIVE SUMMARIES 4 2.1 Structural Examination Summary 4 2.2 Coating Evaluation Summary 4 2.3 Repair and Reconditioning Cost Estimate 5 2.4 Remaining Tank Life 5 3.0 RECOMMENDATIONS 6 3.1 Interior Wet Structural 6 3.2 Interior Wet Coating 7 3.3 Cathodic Protection (C.P.) System 7 3.4 Water Stagnation and De-icing System (SolarBee GS-12) 7 3.5 Interior Dry Structural 8 3.6 Interior Dry Coating 8 3.7 Exterior Structural 9 3.8 Exterior Coating 9 3.9 Site and Environmental Considerations 10 3.10 Antenna Considerations 10 4.0 INSPECTION AND EVALUATION METHODS 11 4.1 Methods 11 4.2 Examination and Evaluation Techniques 11 5.0 Engineer's Cost Estimates 13 PAGE 2 129 w x � sem : 1 . 0 PROJECT INFORMATION BSI Project No.: WI 1407 Customer P.0.Number: Customer: City of Elk River, MN Phone: (763) 635-1361 Street/City/State/Zip: 13069 Orono Parkway, P.O.Box 430, Elk River,MN 55330-0430 Customer Contact: Eric Volk Tank Owner: City of Elk River Phone: Tank Owner Contact: Client: Elfering&Associates Client Contact: Kristie Elfering Phone: (763)730-0450 Owner's Tank Designation: Auburn St.Tower Tank Description: 500,00 Gallon Spheroid Tank Location(Street/City/State/Zip):_ Purpose of Inspection: Tank examination and interior and exterior coating evaluation Date of Inspection: June 19,2018 Inspected By: Kelly Mulhern& Brian Kollmer Type of Inspection: BSI Float-down Inspection Manufacturer: CBI,Inc Construction Date: 1993 Serial No.: 931426 Design Code: AWWA D-100 Capacity: 500,000 Gallons Type of Construction: Welded Number and Size of Pilasters/Support Columns: One Tank Diameter: feet+/- Height: Overall 138'6" Shell/Balcony N/A Height to: HWL 130'6" LWL 79' Type of Access to Tank Interior: Roof Manway Tank Construction Drawings: Previous Inspection Records: None EXISTING COATING INFORMATION INTERIOR WET INTERIOR DRY EXTERIOR Date Last Coated 1993 1993 2014 Full or Spot Repair Seamer Seamer Spot Coating Contractor Unknown Unknown Tom Steele Surface Preparation SSPC-SP-10 SSPC-SP-6 SSPC-SP-11 Paint System Epoxy Epoxy Urethane Paint Manufacturer Tnemec Tnemec Tnemec Lab Lead Test Paint Chips No No No PAGE 3 130 2 . 0 EXECUTIVE SUMMARIES 2.1 Structural 2.1.1 Examination Based on the inspection data, it appears that there are some miscellaneous structural Summary modifications and repairs that are required. These modifications and repairs serve to bring the tank into compliance with OSHA regulations,AWWA standards, as well as allow for better coating bonding, allow for safer access in and on the tank and, in some cases, removing unnecessary items. 2.2 Coating 2.2.1 Lead and Chromium Content Analysis Evaluation The total lead content of the interior wet, interior dry and exterior coatings was not Summary analyzed,this is based upon the year the tower was built. In 1993 Lead based coatings were not being used. Based upon the tower's location reconditioning specifications must include provisions for full containment. 2.2.2 Interior Wet Coating The tank requires a complete new interior coating within the next 1 to 2 years. It appears that the tank was last coated in 1993 when the tower was erected, it is 25 years old and is considered non-repairable. A properly applied and maintained immersion service epoxy coating should provide twenty (20)to twenty-five (25) years of service. See photos Appendix A. 2.2.3 Interior Dry Coating Overall the interior dry coating is in fair condition. There are random coating failures throughout the interior dry surfaces. With larger failures in the drywell tube and above the top landing. The complete interior dry surfaces should be reconditioned at the same time the tower is next scheduled for reconditioning. See photos in Appendix A. 2.2.3 Exterior Coating It appears that the tank was last spot repaired and coated in 2014. The exterior coating is not classified as a lead or chromium based paint. It is in fair condition. Due to age, chalking, and deterioration, the entire exterior coating is not repairable and should be removed and replaced within the next 1 to 2 years with a zinc/epoxy/urethane coating system. See photos in Appendix A. 4 131 2.3 Repair and 2.3.1 Reconditioning Cost The costs for structural repairs, full reconditioning of the interior wet, partial Estimate reconditioning of the interior dry, and a full replacement of the exterior coatings with containment are estimated at $628,300.00. This estimate is based on current pricing. For up-to-date competitive bids,the project should be bid 9 to 12 months before the scheduled starting date. An experienced tank coating contractor with the proper crew and equipment should be able to complete the project in 11 weeks. At the time of reconditioning,the tower will need to be drained and remain off-line during surface preparation and painting. 2.4 Remaining 2.4.1 Tank Life Based on the inspection data, it appears that, if the recommended structural repairs and coating replacement are completed within the next one (1)to two (2)years. The tank and the coating should be first inspected within the warranty period and every five to seven years thereafter. The new interior and exterior coating, if applied and maintained properly, should last to twenty (20) to twenty-five (25) years with only minor repairs. 5 132 fry - 0 3 . 0 RECOMMENDATIONS The photographs referred to in this section are in Appendix A. All drawings are found in Appendix B. The surface preparation requirements for all repairs as well as the requirements for welding are described in Appendix C. The exterior and interior paint chip test results are in Appendix D. Based on an evaluation of the inspection data,the recommendations are: 3.1 Interior Wet 3.1.1 Structural Remove the existing roof painter's couplings and replace with new 3-inch diameter couplings. See photos 2 and 3. Seal weld the two (2) 26-foot long intermitted roof rafters, presently they are welded on 4"x 12" spacing and are caulked. See photos 3, 4, 5 and 6. Remove all caulking and seal weld the overlapping plate joint seam on the 26-foot diameter roof dollar plates. Also seal weld the 10 feet of the butt joint seam. See photos 7 and 8. Remove all caulking and seal weld the overlapping dollar plate joint seam onto the roof plates and the 36-foot diameter roof plates to the shell plates. This joint is 26- foot diameter. See photo 8. Remove the collar around the 42-inch diameter drywell tube and 6 to 8-inches of the dollar plate. Remove all welded spacers on the drywell tube. Install a 'A-inch thick plate over the opening and seal weld both interior and exterior to the drywell tube and roof plates. See photos 8, 9, 10 and 40. Remove the existing ladder to the drywell tube exterior, it has been damaged from ice. Install an OSHA compliant ladder and safety cable to the exterior of the drywell tube. There are approximately 50 severe corrosion pitting that may require pit welding and grinding. See photos 11 and 12. Replace the 18 x 24-inch oval manway gasket located in the bottom section of the drywell tube and the 24-inch round manway gasket in the tower bowl plates. 6 133 Remove all erection bracket scab marks below the HWL by air arc gouging, cutting torch, or grinding. There are approximately 100 erection bracket scab marks. Repair the tank surface by welding and grinding. This will require approximately 40-man hours of welding and grinding. Grind off all weld spatter below the HWL. This will require approximately 30-man hours. ...................... 3.2 Interior Wet 3.2.1 Coating The coating Dry Film Thickness (DFT) on the roof openings varies from 9.9 to 24.3 mils with average of 14.2 mils DFT. The coating Dry Film Thickness (DFT) on the roof structural members varies from 12.5 to 24.8 mils with average of 16.8 mils DFT. The coating Dry Film Thickness (DFT) on the roof plates varies from 14 to 20 mils with average of 15 mils DFT. The coating Dry Film Thickness (DFT) on the shell plates varies from 12 to 23 mils with average of 16.5 mils DFT. The coating Dry Film Thickness (DFT) on the exterior of the drywell tubes varies from 14 to 25 mils. The interior coating is in poor to fair condition. The coating is now 25 years old and because of age is not considered repairable. The interior wet coating should be replaced within the next 1 to 2 years. See photos 13 through 24. After structural repairs are completed,the entire reservoir surfaces should be abrasive blasted and the coating replaced with a zinc primer and a 2-coat epoxy coating system. 3.3 Cathodic 3.3.1 Protection(C.P.) Currently the tower does have a submerged cathodic protection (C.P.) system inside System the tower. Presently it appears not to be working. BSI recommends to remove the complete C.P. system from the tower, remove the entrance coupling through the drywell tube and seal weld interior/exterior a plate over the opening, and including the control box at the base of the tower. See photo 25 3.4 Water 3.4.1 Stagnation and Currently the tower does not have a water stagnation system. BSI is suggesting De-Icing System installing a SolarBee GS-9 unit, located on the bottom of the floor between the (SolarBee GS-12) drywell tube and the cone plates.The SolarBee unit will also aid in minimizing the formation of ice inside the tower which can damage the coating system. See Solar- Bee GS-9 Brochure. 7 134 3.5 Interior Dry 3.5.1 Structural Install a 4-inch diameter coax pipe from the upper cone plate to the roof. This pipe will be used to run the City's two (2) coaxes to the roof. Reroute the wireless antennas coaxial cables so they don't interfere with the drywell tube manway. See photo 26. Install a 5-foot high section of transition ladder welded next to each of the two (2) dry riser platform manways. See photo 27. This will bring the manways into OSHA compliance when climbing or descending the ladders. Replace the broken glass electrical globes. See photo 28. Replace the Aluminum jacket covering on the inlet/outlet pipe. Replace any damaged foam insulation from the removal and storage during the reconditioning. 3.6 Interior Dry 3.6.1 Coating The coating on the interior dry is the original coating when the tower was erected in 1993 and is now 25 years old and it is considered repairable based upon its age. However, areas that are subjected to sweating including the exterior of the inlet/outlet pipe should be completely reconditioned. The complete interior dry surfaces subjected to sweating interior of the drywell tube, the complete upper platform area and the exterior of the inlet/out pipe should be reconditioned at the same time the tower is next scheduled for reconditioning in the next 1 to 2 years. See photos 29 thru 38. Spot repair approximately 200 square feet of coating failures below the upper platform, to include the base plate and 2-feet of the lower cone plates. The coating Dry Film Thickness (DFT) on the interior of the drywell tube is from 8 to 14 mils with an average of 12 mils DFT. The coating Dry Film Thickness (DFT) on the interior of the cone and bowl plates is from 12 to 15 mils with an average of 13.5 mils DFT. The coating Dry Film Thickness (DFT) on the interior of the dry riser is from 8.8 to 14.6 mils with an average of 12.5 mils DFT. 8 135 3.7 Exterior 3.7.1 Structural Remove the existing vent and repair the opening in the roof plate by fillet welding a cover plate in the opening. Install a new 24-inch diameter frost-free aluminum mushroom vents with removable covers. The existing vent and venting around the drywell tube do not meet AWWA D100 and local health department regulations.The new removable vent will improve ventilation and aid in compliance with OSHA confined space regulations during reconditioning. See Photo 39 and BSI Drawing No. 6. Remove the lower plate that is bolted to the drywell tube access cover. See photo 40. Replace the steel roof access manway cover at the top dry well tube with an Aluminum cover and with a stop mechanism. See Photo 41. Remove the existing 12'-6" diameter roof hand rail and install a 24' diameter pipe hand railing. See BSI Drawing# 14 and photos 42 and 43. Install a new style LED obstruction light and stand. The new aviation obstruction light should be mounted higher than the highest antenna. Replace the overflow pipe screen. See photo 44. Install a welded Nameplate T-Bracket to relocate the nameplate. After reconditioning, replace all damaged, lose or missing concrete grout under the base plate with non-shrink 3000 PSI grout. 3.8 Exterior 3.8.1 Coating The original coating is now 25 years old, it has been over coated twice and last spot repaired in 2014. The exterior coating is not classified as a lead base paint. However, it is in poor condition. Due to age, chalking, and deterioration, the entire exterior coating is not repairable and should be removed and replaced within the next 1 to 2 years with a zinc/epoxy/urethane coating system. See photos 45 thru 50. The exterior coating is not classified as lead or chromium-based paint. However, due to general location, removing it using conventional open air-dry abrasive blasting methods will cause environmental problems with visible air emissions and fugitive particulate matter. Reconditioning specifications must be designed to be in compliance with local, state and Federal regulations and will require full exterior containment. 9 136 The coating Dry Film Thickness (DFT) on the exterior varies from 5.5 to 28.3 mils with an average of 18.5 mils DFT. 3.9 Site and 3.9.1 Environmental No recommendations are made. Considerations In conformance with Minnesota State Rules Chapter 7025 and Federal USEPA Rules for air quality and control of dust and fugitive emissions, a risk factor analysis has been performed to determine the class of pollution control required for the tower during reconditioning.The risk factor is a calculation of potential risk for the structure and the values in the table of Subpart 3 (of the standard) are the standards of the risk factor for the surrounding properties. The class of pollution control required for compliance with the rules is Class H,which requires full containment. 3.10 Antenna 3.10.1 Considerations There is two (2) City owned whip antennas located on the tower, and twelve (12) cellular antennas. See photos 51, 52, 53 and 54. During the next scheduled reconditioning the Telecommunication Companies will have to relocate their antennas and equipment to temporary facilities. After reconditioning the should relocate their equipment back in the tower and onto the new roof hand-railing. The cost of this shall be their responsibility and not charged back to the City. 10 137 4 . 0 INSPECTION AND EVALUATION METHODS 4.1 Methods 4.1.1 The tank was evaluated on the interior and exterior in conformance with the following: a) General guidelines of AWWA Manual M42 Appendix C "Inspecting and Repairing Steel Water Tanks, and Elevated Tanks for Water Storage". b) BSI "Procedures and Guidelines for Inspecting Existing Steel and Concrete Water Storage Tanks". The inspection of the base metal and coatings on interior and exterior surfaces included only areas accessible without scaffolding or special rigging. Where possible, the base metal and coating on the interior wet surfaces were examined from a rubber raft while the tank was being drained. The overall structural condition of the tank was visually examined. No structural analysis was done to determine if the tank design complies with the AWWA D100-96 Standard for"Welded Steel Tanks for Water Storage". However,any observed non-conformance to the AWWA D100 standard is noted in this report. Although compliance with OSHA regulations was not a part of this inspection, any unsafe conditions or violations of current OSHA regulations that were observed are noted in this report. 4.2 Examination Some or all of the following procedures were performed as applicable: and Evaluation 4.2.1 Site Survey Techniques The tank site was evaluated for proper drainage and conditions affecting access. Also,the following site dimensions were obtained; distance to fence(s), power lines, owner buildings, public property, private property/buildings,school/playgrounds, public parks, and other property. 4.2.2 Foundations The tank concrete foundation was visually examined for cracks, spalling condition of grout, indications of distress or settlement, and elevation above grade. 11 138 4.2.3 Tank Plate Thickness Plate thickness measurements were taken using ultrasonic methods (UTM). The readings were taken using a digital readout Nova D-100 Ultrasonic Thickness Gage that has a dual element probe (transducer).The probe's transmitter element sends a short ultrasonic pulse to the material. The pulse, reflected as an echo from the opposite side of the plate, returns to the probe's receiver element. The round trip time is directly related to the material's thickness. 4.2.4 Coating Thickness Interior and exterior coatings, where accessible,were tested in accordance with Steel Structures Painting Council SSPC-PA2 "Measurement of Dry Film Thickness with Magnetic Gages", using Type 2 Magnet Flux Gages with a fixed probe. 4.2.5 Coating Adhesion Adhesion testing of the coating to the steel was performed by ASTM D3359 Shear Adhesion Test, Measuring Adhesion by Tape Test. In addition, a subjective coating adhesion evaluation was performed using a penknife. 4.2.6 Coating Serviceability The estimated remaining coating life, or serviceability, evaluation was performed using a wide variety of inspection instruments such as dry film thickness gauge, penknife, 30x microscope, and serviceability evaluation experience (minimum experience 20 years). The instrument inspection was combined with a close visual inspection of all the interior coating's accessible areas.This was done to detect any holidays (misses), skips, runs, sags,surface contaminants, overspray, dry spray, poor coating cohesion, inter-coat delamination, loss of adhesion to the substrate, adverse conditions of the steel underneath the coating, or any other defects affecting the intended service. 4.2.8 Coating Lead and Chromium Content Analysis BSI Recommends taking paint sample before writing the Specifications to confirm that Lead based paints were not used.. 12 139 + � ,, 0. r 5 • -,=:, 5 . 0 ENGINEER' S COST ESTIMATES BSI has prepared a cost estimate for the City to use for budgeting purposes. Due to the age of the coating and the percentage of coating failure,the tower should be fully reconditioned in the next 1 to 2 years. The following cost estimate is based on a construction schedule of 11 weeks. An updated Engineer's Cost Estimate should be obtained within 12 months prior to bidding the project. 5.1 Interior Wet Structural Repairs $ 55,200 5.2 Interior Wet Coating-Complete $117,000 Type of Coating—Zinc/Epoxy/Epoxy System 5.3 Interior Dry Structural Repairs $ 11,100 5.3 Interior Dry—Complete Repair $ 39,000 Type of Coating—Zinc/Epoxy/Epoxy System 5.4 Grid bee GS-9 Mixer $ 15,000 5.4 Exterior Structural Repairs $ 21,000 5.5* Exterior Coating- Full Replacement $255,000 Type of Coating—Zinc/Epoxy/Urethane/Fluoropolymer System 5.6 Exterior Logo $ 10,000 5.9 Mobilization $ 20,000 6.0 Engineering Specifications and Inspection Fee $ 81,000 6.1 2-Year Warranty $4,000 6.1 Estimated Total Cost $628,300.00 *Includes cost for containment. Badger State Inspection,Inc. Report prepared and certified by: Robert E.Kollmer-Bob NACE Certified Coatings Inspector No.1291 13 140 APPENDIX A PHOTOGRAPHS 141 ,, . xi ill , - , - 4 A,. a V • Photo No. 1 Overall view of tank ri a st�r �` k - ' rE 2 ' `, k " , _ . , �'� Photo No. 2 Unwelded roof plate seam of the dollar plate, painters coupling and roof rafters. 142 3 t r IP Photo No. 3 Roof vent, painter coupling and roof structural members. G�r1 E�{4 t,s a Photo No. 4 Intermittently welded roof rafter. 143 f,'5 +"+w A 3 P r ... ��w ff f: u, E< 1� .rill ,. z w Photo No. 5 Intermittently welded roof rafter. . P f� n rti Photo No. 6 Intermittently welded roof rafter. 144 ���,.�`t�� xt .t� `" a � . t - #^ :t ' " fi --t , � ' : I t*bd7.ii jG, Photo No. 7 Unwelded over lapping dollar plate on to roof plate. - t to mob` a_ Photo No. 8 Roof over lapping plate seam. 145 • !I� A 5 k i Photo No. 9 Rood centering collar around the drywell tube. Y� 1 Photo No. 10 Roof collar around the drywell tube. 146 - d us b - - .��, ,,gr A Photo No. 11 Sever corrosion pitting. c.':;.: 2 �ry� i" li rr 4.. Photo No. 12 Sever corrosion pitting. 147 to#, 414, r $tw w � k v 3 z 1, � ter. `. • ...---..-.4„....., .,, „,.... „.. r.,-...,.., „ , ,,,,-- 4.,. . :,, „ Photo No. 13 Damaged coating on the interior roof plates caused from exterior welding of antenna mounting plates. . f F'i$`�394asx --"c.'.;:, x ----.'"Will,41:. ';ti ,.,....;.:....:,,...t,h,),,,;,,,,,,,,,sf:,,,iti:i.;.,,,,,,,..t.ii...,,,,,,,..„H.2,74.",.,,,, „.,ot-1,1,6,01:,.,:711.,5„:-.jok;i1J.:.r..;:,..eti,,..iftt.;v1totrii..,f,,....,,-;;,:.5::.;, myµ Photo No. 14 Coating failures around the overflow vortex breaker. 148 1'. Photo No. 15 Coating failures on one of the drywell tube compression rings. Ya o-k Photo No. 16 Rust bleed coming from an unwelded over-lapped plate seam. 149 �t c ,x'ill s: ,a, 'j c�j a Photo No. 17 Coating failures around a painter lug. r y v,-,, f a :� , a . Photo No. 18 Coating failures along a shell weld seam. 150 5 lite 1ilq q P+' a' k�� i .t } �> Kr Photo No. 19 Coating failures on the shell plates. * uj e A, c . 411, y�'A`,'«h,t'i . PRi' YY'C:.H Photo No. 20 Coating failures on the shell plates. 151 " *°FT's i..;, n .' s o tri #" y t � p�+r `� 4 �, ��i i r ? j � u o' 4 xa> Photo No. 21 Coating failures on the shell plates. '''!,':',,,::,!::iiiiNt.18iirgli;.,-,- i,tt kro`p+l r' $ '3 vt1.. sza3 wr. 17 _ asst.,, 777, . '.> �.�; .: Photo No. 22 Coating failures on the shell plates. 152 1 Photo No. 23 Coating failures on the shell plates. r` � s � y 4, }Hq i tf � ' } � �'y4 Photo No. 24 Shell coating conditions. 153 MGRD LI TRS; :,.t:,_;:;c fYxl-Crl'ee S••9;EM ' / I* ter` uny AZ: e' ® 1: :".1kJ NM y 3 Photo No. 25 ...datiiiiiillil' Non-OSHA compliant balcony i \i �t K y e'M @ p ''''''''''‘'''''''''t.'"1 '.. v) fd =.'INF'4 1 r Photo No. 26 Coaxial cables interfering with drywell tube manway. 154 1 �b Photo No. 27 Manway in one of the interior dry platforms. Photo No. 28 Cracked and broken glass globe protecting light bulb. 155 rye'. t £' £ E€fit ,W :.[Ai' '''''''''''''''''''' k ' e€ c ; .fi� 4 ta k �� . ... � 9 3 P,f 11:::!'flitiliiiitijili----:; 4::,,,,..00ftirmilmismor , Photo No. 29 Top of the drywell tube coating condition and access to the roof. s, a€�, k ' �� t ? it r3� " fl # wI '' r I # i ri Photo No. 30 Coating failures around the drywell tube access manway. 156 M ,, 2s ,, „ .....w,.a '''''''''''l h Photo No. 31 Exterior bowl coating condition. ' . ., ' , i / ' , ,,--.„4.;,, :, ;11',11.1,,,i-,-110,,,•-,F,,:fil, ;,,,,, , ,,,,, _. .r, ,, ,, ,7,,,,,,,,,c,,,, ,, —" ' ' 4 et.,I3 , , ' 4,-!,''3' ...-, ' w s., , Photo No. 32 Coating failures around the bowl manway. 157 e ' r 1''''' '' i':'*:-.44'''' , '''''' ',1,„.';''' ' ii , 4110 .4 ,,: ,:i , p‘f* . ',. ..1.0,,,i;?_-.1,,,,,,.4:,,.... .., ,, --7-,-..„4,,,„. gil,„,,4,7:.;_.; ,_ .'.. it.„4,-,,,,, Photo No. 33 Upper condensation platform coating conditions. , i t 3 ,M Y \ '' /, ,,, a , 3 ' 411111 , Photo No. 34 View of the bottom side of the upper platform and floor drain connection to the overflow pipe. 158 • i '''...3.7';''4';''''' =#; ,� G .4 p.� `�:` ;�a4 ,, 36 ; 4 .,.# .�.u... '''x Photo No. 35 Coating conditions on the lower platform and the drain opening. w v ' f rr, v " v n 4 :,-,,r,,,.....,..-;.,...,7'',.::. , ; # . Photo No. 36 Coating failure on the interior of the tower base plate. 159 fa` 4441111111111111111.1110.- 4611111.60„.460 000 Photo. No. 37 Coating failure on the interior of the tower base plate Photo No. 38 Coating failure on the interior dry lower cone plates. 160 ; ""i. . . IS. IN . . +E< t . .,.,, .,:„.!,,, ,,,.,1 x `J , ,. ',, a r iilliSkli ', ig. --4 P # . x 4* it I R ., • i Tyr• v �... .� pr- Photo No. 39 Roof vent and wireless communication equipment. isj f st T myAyF k � M1 .2^x .i SY d -„ .. l x * 1 s Nr t ,`. µ } 8 Photo No.40 -.---- Bolted bottom extension of the drywell tube cover plate. 161 t 1 2 x 1 No, n., 00001100r, , i l i f b . xh 40 0,09). 2 Photo No. 41 Roof access manway. 1 lik . . ' ,, Ill 15:....:11:.:::.T..........: i s ' ........./.... „.''' 4. 0 .74 .T1.. '4 iolii ''''ir • • ,.,, xvit, .,..:.: ,. . ,,,.. x „„ 7 XI 11.:: m .ry �� •�a. het �. ii Photo No. 42 Roof hand railing and wireless communication equipment. 162 _ • ten t. t a�• %nr Il 1 6 x • *11 IIII 0. kh • 11 0 1 k ....., i A:kJ: ' ' - ,,, , t 3 ' • /4 - t 1:, 1.!i' ll. ' - 1. di g,�* ,w w �i all v. ;,a. t` • � s . 4...„,,,*""..".'-... 4 ''lb''....... -4111 — 7 1 g p Photo No. 43 Roof hand railing and wireless communication equipment. a N , )00 totollovilli Ill 5 4' .4..., •� * 01111111. c. MMS op Oto 4 " w «.w ° N „ +ar .44:4 �r s- S ;..''''' "V: tl w n Photo No.44 Overflow screen. 163 Photo No. 45 Exterior coating spot repairs. Photo No. 46 Coating failures on the exterior roof plates. 164 a: X $ 1 0gi h144 R to M1 i ,' 4yh e .-pit� ' rj _ ,# i d Y giP • 6.;-i xis��- r ' 7„ , � '.cC Oi `' It dv3 s r € Photo No. 47 Exterior coating failure on the dry riser. r !,., ,irL - iRt ;-- fTr v P' f +c; Y lM+ j N }`tY F E'�`"- 4 1: W P.m W✓ ,.'r7'. rR a 4 ur Photo No. 48 Exterior coating failure on the dry riser. 165 .•x :ia r • e y Photo No. 49 Exterior coating failure on the bowl plates. "..41tit Photo No. 50 Condition of the exterior coating on the bottom bell. 166 _ ° 44 4. ' ..711.? '; 4. ti 1:11, _ , _ ticE5-14. 1 -: --ii,-, ii, , ., . c'''.. iii t f ° k fr{ u. 1 #� St S � i i• 1.11 i II r Ili • , ~ s 4 • _ ' .' Photo No. 51 Wireless communication antennas and radios amounted to the roof hand railing. , :::,%I A i...-,... ' NI' - . ' , '7,,,,, .41411"1""''' r. of /1r t e ({ ,; N '' /1111111 k if i -41101/441.4 )' ``r : i"'i* -1.....1:- .:>.., , 4„ ,�Yw e' % ''.'#. - Photo No. 52 Wireless communication antennas and radios amounted to the roof hand railing. 167 •VT'' ' .1 { ' V k ' ' ' 1111 '' a F VI '� 3 1 Photo No. 53 Wireless communication equipment on the interior dry area of the tower. Fh w ,. 3 o- ;•*, 2sµ tow „ tr 7 ,,.r IF Photo No. 54 Wireless communication coaxial cables and conduit around the interior base plate. 168 APPENDIX B DRAWINGS 169 I- H -J cc ce w O CO Fa < Hd < Li < ) I X W U N M U In U 7 i LY N w o0 w �w 00 X CV N W a ¢ ZZ j Z 0 �w Z X k *k L 2 >2 N Z W W WJ U W �ZW1 O U0 1�A I.7II: o Ux m > > 00 aa< < \ikMa M}- x 9I it It o z i�,.. o 6 I-woo �` _ W Z omm `0 �P�S�� ��,.... ,,,, � Z Q XX ZONZ �a \ W Z Q tY XX .0 n. vai �w A. D N''w o0 a LU---vri — cl: 0 0 ceP o8• ow F- m 0 z_ z o w >- ww U �ii WLLI O0 m OZ } Q Q Ud' Q 0 a J 0 W CCW N fM Z d wwJ W < f_ Q Z0 V~)0 wU O. 0 O > re E EL 0wo NZ N0 2 40 N I 1 Z� - 0))z 0 w 0 0W FHS �F ---- (nm No • Q2, LZ i.,-N < Q_ 0 �O W< 2 CeCe St0v NM M0 0 7 (....37,1' W Z U) cQ U) D G . ❑ < §._ W �LU ©0 0 00 0 0 Nr P v)ww Z ww —2 U 0 <0 < < 0 Z 9 .S i .1 .6 .1 Wcn m > Ga „ r. a� ILII W .-�I Z ".O C. _ I > y h. /�� I N. Z G I". — 0v.' L.,-10-1 _ lgA _ U) Cl.) -'-: �� ' Q /) Lft r % ¢ W � / Z w E d > m C✓ lik NZ Nm ON 40 .„..., ,_ .. J Zw,-. •WNZ zo m L7 LU Q 't'H a' J F 0 W e Z z F-- ZZ Nm 2 Q ?SOU NM C“ jGridBee® GS-9 FEATURES • Submersible, grid powered, circulation equipment for potable water tanks and Technology Description reservoirs. Designed for continuous operation and can be installed through roof hatch without requiring tank entry. Machine can be installed through 12 inch (30 cm) diameter opening. Minimum Access Opening / Assembled machine is 2 feet (0.6 meter) in length X 10 inch (25.4 cm ) in Machine Size/Weight diameter and weighs 65 pounds (34 kg). 316 stainless steel shell and hardware construction. GS-9 has been Materials of Construction constructed using safe materials for contact with potable water. See certifications section below. Submersible motor, designed for continuous operation, low power requirement, Submersible Motor direct drive, no gearbox and no lubrication schedule required. See certifications section below. The standard 120VAC motor requires 1 20VAC/1PH power source outlet (20 Power Supply Amp Service), nominal power consumption is 750 Watts. The GS-9 120v unit draws approximately 11.0 Amps @ 120VAC /60Hz. 75 ft (22 m) of submersible power conductor included to terminate within Wiring junction box at top of tank. Junction box, also included. 316 stainless steel tank fitting and cord grip included for sealed cord entry Sealed Tank Fitting through tank roof. 75 ft (22 m) of 316 stainless steel retrieval chain included for machine Retrieval Chain installation and retrieval without requiring tank entry. Chlorine boost connection point, 3/8" NPT Male, on machine for adapting to Chlorine Boost Connection 1/2" (13mm) hose for fast chlorine dispersion during in-reservoir boosting. Intake draws water in a horizontal layer within 8 inches (15 cm) of the tank or Low Elevation Intake reservoir floor. Suspension kit included for suspending the GS-9 if required. At depths below 2 feet (0.6 meters), the machine should be shut off to prevent Minimum Water Depth damage. (1) Portable Chlorine Boost Hose and Boost Pump System, (2) Control and Accessories Available SCADA Panel Warranty Limited 5-year parts and labor warranty. Medora Corporation's potable water products are certified to ANSI/NSF Standard Certifications 61, including Annex G for low-lead content. Learn more at: www.medoraco.com/std61 Subject to change without notice. t,wfl.am. fl;r: atI Medora Corporation•3225 Hwy 22 • Dickinson, ND 58601 +1 866 437 8076•Ph+1 701 225 4495• Fax+1 701 225 0002•www.medoraco.com ©2014 Medora Corp. FeatureSpec_GS9_20140520 171 I °.D-SAF FIXED LADDER SAFETY SYSTEM LAD-SAF"FLEXIBLE CABLE SLEEVE The Lad-Sar sleeve is globally recognized and *,11111preferred because of its user friendly and reliable _--------.- •6116280 design.n.The sleeve is easily attached or removed ii, STANDARD TOP BRACKET anywhere along the cable and automatically i Is Galvanized top bracket with mounting follows you as you climb or descend.In the hardware.For systems up to 499 ft.(152 m) event of a fall,the device locks onto the cable high,fits up to 1-1/8"(2.85 cm)rung lifeline allowing you to regain your footing diameter,attaches to 3 rungs,built-in energy absorber. and continue to climb. 6116410 Standard top bracket and /°'° hardware for systems 'f/t1/ 6116540 over 500 ft.(152.4 m). LAD-SAF'FLEXIBLE CABLE SLEEVE For use with 8mm or 3/8°diameter 1x7 or . I I " 4 7x19 solid core cable.Comes with 2000112 u £, a m t E. -r. carabiner.Meets OSHA and ANSI standards. z n 2 t -6110000 , v1,,.. 6116541 Lad-Sat-Flexible Cable �, sou r Sleeve without carabiner. CABLE LIFELINE L Galvanized cable,3/8"(9.5 mm)diameter, :, �-;, 3 1x7 type.Last 3 digits in part number ��;1' y _ m ` indicate length. , r If Oil '' ---------.6100400 ' ° CABLE GUIDE ':. Non-metallic cable guide with mountingi,. , hardware.For systems up to 199 ft. (60.6 m),fits up to 1-1/8°(2.85 cm)rung l 6116 07 I diameter.Must have 1 every 25 ft.(7.6 m). 1 c, ,- LAD-SAF-FLEXIBLE --•6100515 Cable guide and hardware CABLE SLEEVE For use with 8mm or 3/8"diameter 1x7 04 for systems over 200 ft.(61 m). or 7x19 solid core cable.Comes with > 2000117 carabiner and .6116540 , , r1 t:',..,7,-;, 4 integrated shock absorber for �� i"�g, global compliance. -4 ' LAD-SAF'"FLEXIBLE �` r ��'� CABLE SLEEVE V :-.-14: +� - �` �� °' .=y. Climbing sleeve see product details to right. ' `' tom, 6100090 = . STANDARD BOTTOM BRACKET - �I .. Fits up to 1-1/8°(2.85 cm)rung diameter, - attaches to 2 rungs,tensioning -. 1 1' i device,galvanized. I Bl-SALA' WWW.CAPITALSAFETY.COM 800.328.6146 172 73 FULL BODY HARNESSES E YO F I T NEX-,1 .!, PrOtt Ltil'n dirt 4,01i-if()t .it 1 The Ultimate Full Body Comfort Harnesses ' ‘.%hen carrying heavy materials. , ** ExoFit NEX" harnesses are the 7-,--- '...' %I.. newest,most advanced harnesses in the „ - --' `r , Easy holstered snap hooks break industry.They're the culmination of our Ilk " ro'rI=Lyei away to avoid trip hazard. p experience with ExoFit and ExoFit"XP. ongoing ongoing research and the incorporation ---,:.---z-_, :,..,..2...v.--m.,=,.::::,;;;;,.. i-CI4=i-4 ,-... of new materials and innovative features E W7::4' 'X':::::::.V.W.V.Vrii:.: •:' For greater visibility ir ddrk and —-.v.............v......,,,,,,,., . A When you purchase an ExoFit NEX dangerous environments reflective '"*, harness you can pe certain that you're . .-----,-...- material is integrated on lep,s chest tim-L---z•ZI .:::::::::::::::::::::::•:::::::::::::::::::::\ shoulders and back 7**,1 purchasing the finest harness available .t..-"7-E:71,-.-_;-T--.. ,:.::::;:.::::::::::::::::::::::,•;:::::::::::::::,. .e .:7/..X.::::•:•::::,::::::::.....x..... .!,-....704. at r 1 today from DBI-SALA or anyone else - '- , ,11- -- COMFORT True to our NEX mission,we P IP ,• „,," -,4:01 Conveniently holds and protects a ce mc.niiracture these harnesses using rnat.ria,, EXOFIT *1 '1 - -t phone,camera or other items , that con:add unnecessary weight. Nrar -'45,,. ib ,- '1.- tgar RUNCTION When speed and efficiency .re pro Oct,-,qc.irements.ExoFit NEX %%ill _.---...-1S-. hater repellent to reduce attraction of IT provide the freedom and confidence to _ = and dirt-also has up to 5 times more fua nction at you,inximum potential -............- abrasion resistance .2"-- ..7--,.-F....-,-,,...:: DURABILITY E,,-)Fit NEX harnesses ,-r,,,le,iyriedi....,ing material:that last .4-:,•:-..;:.:::.,-. '------.-:--.•• -.-.:-•-:,.:::::;:..I.;;;•:••••. -.:.;..... .?•:::,...illii‘-ttiftil:Iiii.iiit-,:-%.-•:.-::•::::::::..,.. 1?".:.: illAilifiliiilf:ii1;:::::::,-iiiii:if:',:iiii:K-.`.‹, ,''' :?,-:i:E.i.:•iiii::.t ::;:iliaillii.:ii:I:::::::,„‘„,:::,::::::i.:iii:Ei:: * -.-:„-:-:-.:-:-::::„- -•:-7-,„....44::::::::-:::- 7,7-4.1:---1. --- ./. ,, 2--.-_,, : .,:i:ifiiii§.1.Eft . Simple and fast adjustments that - -. -,.sizisac;.-. - :-;!..r.e?1, :zi-;::4:a--$.,..' I, eliminate loose ends and lock into L., ” .,.. : 12:'.4-i:5-.',..N-`"2.M.: ''...<2-...e...-,.=,.s.: place,preventing slippage 1:',.,, , - - „--- ..;;;,:::-.5;,,,,, .,,,. .,..-:-..,:„- -„, .',._- -,....,..,o,,? -'", , I,,ii .„ r 3 ,..1:4i; -.7) ,-1.'"''itplii-44,41:e 14,:311,:„... .• ; t,..r ' 4. Patented.; spring-loaded16— des ,., :s7 automatically stands-up.ens.1' Ligho,',ught moisture v,icfing and , --f.0.itiv-1, 16.70,11,..,.- w4,4 ' breathable padding won't move or slip, w--"t '''."-"I-— fast,easy and safe connect 4( NIS' . to your fall arrest syst: always keeping the wearer comfortable. ---- - ,- 4.„......- , -.:.. 4201B ...: Extremely lightweight alloy commonly A s used in nulitary and aerospace offers a ' ' 4.1=V'...'? It or , o s'. high, le.el of s,curity and comfort 14 N 1,1-cdel Sho.ru 11131;0 .°;..:,1-; ;#1 ,, i WII! ,,',...,•,...1,-,,....6:„., •:.0.1.4.0..,1:1::.,,,- tlist, Y OR Pro,ce an adjustable co-bridot,s t t„ -i-•T'... iii1111 1114 I op for post fall minimizing .igh..- -4 '''''' k".'-:$7.k.:.k.,,-... ..!!:x.:11451i.t.2.7.,,,,.1,..0.3...k"..,,,,..7*.;:: , , I '15— ..-.00,'... ../ / suspension trauma. • .0- - :- ...v.,/ ='= =•.,,g4„, . I, , •44.7.^V ., /Of il?..**4.1P. - ---.....vk I!.1/4'; _'4X-';" - , -• ,, " : ,,,,,•filt,Vit.. -t,#.,.4 , 4._ - -1:Wribz k iff- -- --,,,,• Light:ieight orie-haide I c.:e memory-fit w',b-lock ensures las. ,- , non-slipping connections O :t7 W ......,, ... .11.-,- ...........-- Equipped.vith - 41111) A single piece of material in the Moves with you, shape of an X',craps around the • isaFe Doesn t rut or chafe wearer for the ultimate in comfort. t security and no-tangle dr,ir-_-t 20 tbitt= -..,„ =•"--, r ,,,, 0 or- aZ0 w 0 OF /\ N N w� Q 4- La.! 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Mo� d Oz wO W tu.� 3� • I- Q.,. 1 �t \\ < w z ^ iw \\ 0 �m= a aJ < ` Q Z rti, \ I.T. _W a <0 a — \� J w_ m m° Q/ \\ O K 0 0 M Q - \\ 10 0 JJ O aJ 0_ J W \\ Inm� - az 0 o,x I- 0_ I- ((°❑�1 f\ NH h <�3 0 0 0< 0 0 w 0 0> Q Z �� Z Lon .Ti \\ = O 00 0_ Z 0_ \\ I-- \\\ W I- aCL w Cl) Z f-- f \\\ — �� a_ ] c� Z F O > 49 410 D CL \\\ ©b m CO N 4,r 1 HORIZONTM SERIES i 4 ,'-v''''' L-810 LED HU(iHEY x. `° � � Obstruction Light Application: The Horizon Tt,, L-810 Obstruction Light provides PHILLIPS an LED based solution for the FAA L-810 steady HorizonTM FAA Type L-810 SteadyBurn burning lights. The Horizon LED is currently Yp available in both single and double configurations Obstruction Light operating at a range of 95-277VAC and also in a ICAO Type: Low Intensity range of 9-48 VDC. Both configurations are available Type B Obstacle Light as original eqiupment or as a direct replacement to the existing socket/lamp/lens on H&P L-810 ETL Certified: Incandescent OB2x Series obstruction lights. FAA AC 150/5345-43F (pending) Features: Compliant to: ■ LED based obstruction lights last over 15 times ICAO Annex 14. longer than an incandescent light CAR 621.19 MIL-C-7989 • Approximately 96% less power than 116 Watt standard incandescent lamp ■ 4 Watt Power Consumption (AC Version) 13.4 ("1"""IhN\ Watts (DC Version) i:;: ■ Weather resistant lamp assembly& housing • Self contained wiring compartment on double units eliminates additional boxes • Operates as a steady burn or flashing light a 11 ■ Resistant to shock and vibration • Direct replacement for existing incandescent fixtures • 5 Year Warranty T:\ - 4 _ ii l A III 1 s I I ,1 a fi „ APPENDIX C SURFACE PREPARATION REQUIREMENTS 178 i NACE SP0178-2007 f �.•�'�. (formerly RP0178-2003) NACEItem No. 21022 INTERNATIONAL Standard Practice Design, Fabrication, and Surface Finish Practices for Tanks and Vessels to Be Lined for Immersion Service This NAGE International standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. Its acceptance does not in any respect preclude anyone, whether he or she has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not in conformance with this standard. Nothing contained in this NACE International standard is to be construed as granting any right, by implication or otherwise, to manufacture, sell, or use in connection with any method, apparatus, or product covered by Letters Patent, or as indemnifying or protecting anyone against liability for infringement of Letters Patent. This standard represents minimum requirements and should in no way be interpreted as a restriction on the use of better procedures or materials. Neither is this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the usefulness of this standard in specific instances. NAGE International assumes no responsibility for the interpretation or use of this standard by other parties and accepts responsibility for only those official NAGE International interpretations issued by NACE International in accordance with its governing procedures and policies which preclude the issuance of interpretations by individual volunteers. Users of this NAGE International standard are responsible for reviewing appropriate health, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE International standard may not necessarily address all potential health and safety problems or environmental hazards associated with the use of materials, equipment, and/or operations detailed or referred to within this standard. Users of this NACE International standard are also responsible for establishing appropriate health, safety, and environmental protection practices,in consultation with appropriate regulatory authorities if necessary, to achieve compliance with any existing applicable regulatory requirements prior to the use of this standard. CAUTIONARY NOTICE: NACE International standards are subject to periodic review, and may be revised or withdrawn at any time in accordance with NACE technical committee procedures. NACE International requires that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of initial publication and subsequently from the date of each reaffirmation or revision. The user is cautioned to obtain the latest edition. Purchasers of NACE International standards may receive current information on all standards and other NAGE International publications by contacting the NACE International FirstService Department, 1440 South Creek Dr., Houston, Texas 77084-4906(telephone+1 281/228-6200). Revised 2007-03-10 Reaffirmed 2003-03-17 Reaffirmed September 1995 Reaffirmed March 1991 Revised 1989 Approved 1978 NACE International 1440 South Creek Drive Houston,Texas 77084-4906 +1 281/228-6200 ISBN 1-57590-167-6 ©2007, NACE International 179 SP0178-2007 Foreword When specifying tanks and vessels that are to be internally lined to control corrosion and prevent product contamination, special design, fabrication, and surface finishing practices must be considered to obtain the desired performance of these linings for immersion service. As the corrosiveness of the product increases, the design and fabrication of the tank or vessel becomes more critical relative to the performance of the lining. This standard presents standard practices for the design, fabrication, and surface finish of metal tanks and vessels that are to be lined for corrosion resistance and to prevent product contamination. The standard explains how the standard practices govern the quality of lining applications. Appendix A contains illustrations depicting both good and bad practices for tanks and vessels to be lined, and Appendix B contains a list of recommended responsibilities to ensure that an acceptable lining application is achieved. Appendix C contains written and graphic descriptions of five derees of surface preparation of welds in tanks and vessels that may be specified prior to lining." This standard is intended for use or reference by end users, lining specifiers, lining applicators, lining manufacturers, and contracting authorities involved in the surface preparation or lining installation in tanks and vessels intended for chemical immersion service. This standard practice was originally prepared in 1978 by NACE International Task Group (TG)T- 6A-29, a component of Unit Committee T-6A on Coating and Lining Materials for Immersion Service, in collaboration with Unit Committee T-6H on Application and Use of Coatings for Atmospheric Service. The standard was revised in 1989 by TG T-6G-27, a component of Unit Committee T-6G on Surface Preparation for Protective Coatings, and was reaffirmed in 1991 and 1995. It was reaffirmed in 2003 by Specific Technology Group (STG) 04 on Coatings and Linings, Protective: Surface Preparation. The standard was revised in 2007 by TG 295 on Lining, Tanks and Vessels for Immersion Service: Fabrication Details, Surface Finish Requirements, and Proper Design Considerations—Review of NACE Standard RP0178-2003. This TG is administered by STG 04. It is also sponsored by STG 02 on Coatings and Linings, Protective: Atmospheric; STG 03 on Coatings and Linings, Protective: Immersion and Buried Service; and STG 43 on Transportation, Land. This standard is issued by NACE International under the auspices of STG 04. (1)The visual comparator mentioned in Appendix C is a molded plastic replica that illustrates various degrees of surface finishing for welds prior to coating or lining. Full-seam welds, skip welds, butt welds, lap welds, and others are depicted. For more information contact the NACE FirstService Department,1440 South Creek Drive,Houston,TX 77084-4906. NACE International 180 SP0178-2007 NACE International gratefully acknowledges the contributions of the following companies in the preparation of the welding samples and the fabrication of the die from which the plastic replicas have been molded: Ausimont USA, Inc.,t21 Thorofare, NJ CenterPoint Energy,t31 Houston TX S.G. Pinney&Associates, Inc.,(4)Port St. Lucie, FL The Sherwin-Williams Company,151 Cleveland, OH NACE also gratefully acknowledges the assistance of KTA-Tator Inc.,tsl Pittsburgh, PA, in developing the weld pattern that was used to mold the plastic replica of weld samples. In NACE standards, the terms shall, must, should, and may are used in accordance with the definitions of these terms in the NACE Publications Style Manual, 4th ed., Paragraph 7.4.1.9. Shall and must are used to state mandatory requirements. Should is used to state something considered good and is recommended but is not mandatory. May is used to state something considered optional. (2)Ausimont USA, Inc., 10 Leonards Lane,Thorofare,NJ 08086. (3)CenterPoint Energy,P.O.Box 1325,Houston,TX 77251-1325. (4)S.G.Pinney&Associates, Inc.,Corporate Office, 1326 S.W. Biltmore St., Port St.Lucie,FL 34983. (5)The Sherwin-Williams Company, 101 Prospect Avenue N.W.,Cleveland,OH 44115. 161 KTA-Tator, Inc., 115 Technology Drive, Pittsburgh, PA 15275. it NACE International 181 SP0178-2007 NACE International Standard Practice Design, Fabrication, and Surface Finish Practices for Tanks and Vessels to Be Lined for Immersion Service Contents 1. General 1 2. Definitions 1 3. Design Practices 1 4. Fabrication Practices 3 5. Surface Finish Practices 3 Bibliography 4 Appendix A: Illustrations of Design, Fabrication,and Surface Finish Practices for Metal Tanks and Vessels to Be Lined for Immersion Service 5 Appendix B: Recommended Responsibilities 11 Appendix C: Written and Graphic Descriptions of Various Degrees of Surface Finishing of Welds That May Be Specified in Preparation for Lining of Tanks and Vessels12 NACE International ill 182 SP0178-2007 Iv NACE International 183 SP0178-2007 Section 1: General 1.1 This standard presents standard practices for the pictorial representations of welds and grinding finishes design, fabrication, and surface finish of tanks and vessels and are not intended to be representative of the to be lined for immersion service. Tanks and vessels may integrity of the welds. The "weld condition prior to be lined for corrosion control or to prevent product finishing" is not a typical weld; it is only intended to contamination. illustrate defects in welds that must be corrected prior to lining. 1.1.1 Appendix A (mandatory) contains illustrations depicting both good and bad practices for tanks and 1.2 Good welding practices and welding codes govern the vessels to be lined for immersion service. integrity of the tank and vessel welds; this standard only addresses surface preparation of the welds for the purpose 1.1.2 Appendix B (nonmandatory) contains a list of of lining the tank or vessel for immersion service. recommended responsibilities of the purchaser (user), designer, fabricator, lining applicator, and inspector to 1.3 Other design and construction codes or standards may ensure that an acceptable lining application is be used to complement the details given here. When achieved. applicable, the requirements of such other codes or standards shall be considered. A partial list of such codes 1.1.3 Appendix C (nonmandatory) contains written and standards can be found in the Bibliography. and graphic descriptions of five degrees of surface preparation of welds in tanks and vessels that may be 1.4 These standard practices may be used in the design, specified prior to lining. The written descriptions of the fabrication, and surface finish of tanks and vessels for five degrees of surface preparation of welds in services other than immersion, such as dry bulk storage of Appendix C take precedence over the graphics and the solid materials. companion visual comparator. The graphics are only Section 2: Definitions Lining: A coating or layer of sheet material adhered to or in flame-sprayed linings, fiber-reinforced plastic linings, or intimate contact with the interior surface of a container used similar lining materials. to protect the container against corrosion by its contents and/or to protect the contents of the container from Surface Finish: The degree of smoothness of a surface contamination by the container material. For the purposes produced by the removal of sharp edges and the of this standard, lining refers to a surface barrier, usually a appropriate surface preparation of welds and other rough thin film less than 500 pm (20 mil)thick applied as either a areas. The term surface finish is also used to characterize lining or a coating. In common usage, the terms coating the degree of smoothness that is necessary to attain a and lining are interchangeable,but in this standard,only the surface to which the lining can be applied satisfactorily in term lining is used.The requirements contained herein may accordance with the lining specification. or may not apply to heavier, thick-film linings, sheet linings, trowel-applied and pumped-into-place finishes, plasma, Section 3: Design Practices 3.1 Accessibility tanks or vessels designed to be buried below grade. 3.1.1 All surfaces of the tank or vessel interior shall be readily accessible for surface preparation and lining 3.1.3 Additional manways and openings should be application(see Figures Al through Al 0,Appendix A). provided as needed to facilitate ventilation. These must meet safety requirements. 3.1.2 The manway diameter for working entrance and safety reasons during the lining application shall be as 3.2 Joints large as practical for the tank or vessel being lined. 3.2.1 Continuous butt-welded joints shall be used 3.1.2.1 If possible, at least one manway shall be whenever possible(see Figure A5,Appendix A). located near ground (working) level, except in NACE International 1 184 SP0178-2007 3.2.2 Rivets shall not be used. 3.4.2 If appurtenances inside the tank or vessel, including nuts and bolts, cannot be lined, they shall be 3.2.3 The use of internal bolted connections should made of corrosion-resistant materials. (CAUTION: See be avoided to the fullest extent possible. Paragraph 3.3.2.1.) 3.2.4 Continuous lap-welded joints may be used but 3.4.3 If bolted connections are necessary and cannot are not preferred. For sheet lining material,this type of be made of corrosion-resistant materials, the mating construction may not be acceptable. surfaces shall be lined before assembly. Gaskets shall be used on mating surfaces and the sealing surfaces of 3.3 Connections nuts and bolts to protect the lining. 3.3.1 All connections to the tank or vessel shall be 3.4.4 Dissimilar metals shall be electrically isolated flanged. from the steel tank or vessel surface whenever possible. Where dissimilar metals are used, selection 3.3.2 Threaded connections should not be used in shall be such that the galvanic effect is minimized. tanks and vessels operating in corrosive environments Other corrosion mitigation methods may be required (see Figure A4, Appendix A). However, if threaded (see Figure A8,Appendix A). connections cannot be avoided in corrosive environments, these parts shall be fabricated of 3.4.5 Heating elements shall be offset from the tank corrosion-resistant materials, or constructed as shown or vessel surface to provide access for surface in Figure Al 0,Appendix A. preparation, application, inspection, and cleaning. Elements shall be positioned so as not to damage the 3.3.2.1 CAUTION: Dissimilar metal (galvanic) lining system. corrosion occurs when, for example, an alloy is used to replace the steel bottom of a tank, or in a 3.5 Structural Reinforcement Members similar circumstance when alloy appurtenances must be part of the construction of a vessel. If a 3.5.1 Structural support members should be installed lining is then applied to the steel and part of the on the exterior of the tank or vessel. However, if such alloy (usually 150 to 610 mm [5.9 to 24 in.]), any members are installed internally, they shall be discontinuity in the lining exposes a small anode fabricated of simple shapes such as smooth, round surface. Once corrosion starts, it progresses bars or pipe for ease of applying the lining material. rapidly because of the large exposed alloy cathodic area to the much smaller anodic area. 3.5.2 The use of internal flanged connections, Without the lining, galvanic corrosion causes the stiffening rings, reinforcement pads, angles, channels, steel to corrode at the weld area, but at a much I-beams, and other complex shapes should be slower rate. The recommended practice is to avoided. If they must be installed internally, these apply the lining to all of the alloy as well as the members shall be fully welded and welds and sharp steel, thereby eliminating the possible occurrence edges ground to a radius of at least 3.2 mm (0.13 in.) of a large-cathode-to-small-anode surface. or as agreed between the tank or vessel fabricator, tank or vessel owner, and lining applicator(see Figures 3.3.3 Nozzle connections to be lined shall be as short Al and A6,Appendix A). as possible and be a minimum of 50 mm (2 in.) in diameter (see Figure A4, Appendix A). Connections 3.6 Heat Sinks less than 50 mm (2 in.) in diameter shall be suitably attached through a reducing flange (see Figure A10, 3,6.1 Heated, forced curing of lining systems is often Appendix A). When trowel-applied thick-film linings are preferred if not specifically required. During tank or required, additional nozzle inside diameter shall be vessel design and fabrication, especially with field- allowed for lining thickness. erected units, consideration must be given to avoiding or minimizing heat sink areas. Such areas might 3.4 Appurtenances Inside the Tank or Vessel include opposite saddles or support lugs, flat bottoms on foundations,and stiffening rings. 3.4.1 The standard practices in Sections 3, 4, and 5 shall apply to any item to be installed inside a tank or 3.6.2 These situations may be addressed either by vessel that is to be lined. Such appurtenances include, tank or vessel design or by construction or insulation of but are not limited to, agitators, anti-swirl baffles, outlet the foundation or supports. Another possible solution connections, gauging devices, vortex breakers, and is the use of temporary constructions, such as false internal piping. floors or temporary shelters,to achieve uniform heating and curing. 2 NACE International 185 SP0178-2007 Section 4: Fabrication Practices 4.1 All design practices in Section 3 shall apply to all (a) with the use of properly sized heaters; fabrication. (b) by placing the tank on a concrete pad topped with 4.2 All welding shall be continuous. Intermittent or spot a 100-mm(4-in.)layer of vermiculite concrete; welding shall not be allowed. (c) by insulating with a high-compressive-strength 4.3 Fillets and corners must be accessible for grinding. structural grade insulation between the tank bottom and foundation; 4.4 Field tanks fabricated for use with high-heat-cured linings(e.g., unmodified phenol formaldehyde thermosetting (d) by installing an internal temporary false bottom linings)should have bottoms suitably insulated and installed approximately 1.5 m (5.0 ft)above the floor of the tank on properly drained foundations to facilitate proper cure of prior to the final high-temperature bake;or the lining on the floor of the tank. Because the sand-filled earthen foundation, concrete pad, or other similar (e) by other suitable means that practically and foundation is a poor insulator, some means must be effectively ensure a properly cured lining on the tank considered prior to the application of the lining either to floor. override the heat sink or to distribute the heat uniformly. This may be accomplished in several ways: Section 5: Surface Finish Practices 5.1 Sharp edges shall be ground to a smooth radius of at prepare the weld surface and surrounding metal least 3.2 mm (0.13 in.) or as agreed between the tank or surfaces in accordance with the specification. Over- vessel fabricator, tank or vessel owner, and lining grinding, which would result in decreasing the wall applicator. thickness or the integrity of the weld beyond the limitations imposed by good welding practices, 5.2 Tank and vessel internal surfaces to be lined shall not applicable welding codes, or tank or vessel ratings, be marred by gouges, handling marks, deep scratches, shall be avoided. metal stamp marks, slivered steel, or other surface flaws. Flaws shall be repaired by welding or grinding, as 5.4 Automatic machine welds may be acceptable as appropriate. dictated by the specifications for film continuity. 5.2.1 Limits on surface flaw depth and geometry shall 5.5 All weld spatter and arc strikes must be removed. be set by agreement between the tank or vessel Chipping may be used if followed by grinding or the use of fabricator,tank or vessel owner,and lining applicator. an abrasive disc. 5.2.2 All restorative welding shall be performed 5.6 If an anti-spatter material is applied adjacent to the according to applicable tank or vessel design codes, weld area prior to welding, the anti-spatter material shall be approved job-specific procedures,or both, one that is readily removable. Anti-spatter materials shall be removed prior to abrasive blasting. 5.3 All rough welds shall be ground to remove sharp edges and other such irregularities (see Figure A2, Appendix A). 5.7 When checking weld continuity, the tank or vessel Chipping may be used to remove sharp edges if followed by fabricator shall avoid the use of oils, lubricants, or other grinding. See Appendix C for written and graphic foreign materials that would leave a contaminating residue descriptions of five degrees of surface finishing of welds not easily removed by abrasive blasting. that may be specified preparatory to the lining of tanks and vessels. 5.8 Surfaces shall be cleaned and decontaminated as required by the governing lining application specification(s). 5.3.1 The amount of grinding performed shall be judicious and performed only to the extent necessary to NACE International 3 186 SP0178-2007 Bibliography API(7)Standard 650 (latest revision). 'Welded Steel Tanks Directive 97/23/EC (latest revision). "Pressure Equipment for Oil Storage." Washington, D.C.: American Directive (PED)." Brussels, Belgium: European Petroleum Institute(API). Commission.191 API RP 652 (latest revision). "Lining of Aboveground NACE Standard SP0294 (latest revision). "Design, Petroleum Storage Tank Bottoms." Washington, D.C.: Fabrication, and Inspection of Storage Tank Systems API. for Concentrated Fresh and Process Sulfuric Acid and Oleum at Ambient Temperatures." Houston, TX: ASME(8) Boiler and Pressure Vessel Code (latest revision). NACE. New York,NY: ASME. (7)American Petroleum Institute(API),1220 L Street, NW,Washington,D.C. 20005-4070. (8)ASME International(ASME),Three Park Avenue,New York, NY 10016-5990. (9)European Commission(EC),Rue de la Loi 200,8-1049 Brussels, Belgium. 4 NACE International 187 SP0178-2007 APPENDIX A: Illustrations of Design, Fabrication,and Surface Finish Practices for Metal Tanks and Vessels to Be Lined for Immersion Service Full Seam Weld Skip VVeld Skip Weld .A0.1°. Inside " #00/ Tank or Inside of OP Vessel Tank or Vessel Round All Sharp Edges 4110117 per Paragraph 5.1. F. 2 Channels Back-to-Back DO DON'T DO WT FIGURE Al All construction involving pockets or crevices that do not drain or that cannot be properly abrasive blasted and lined shall be avoided. NACE International 5 188 SP0178-2007 Inside of Tank or Vessel Grind Smooth i DO Inside of Tank or Vessel Rough Pinhole Undercut Cillti)\ DON'T FIGURE A2 All joints shall be continuous full-penetration porosity-free welds. In tanks and vessels that require a 100%holiday-free lining,all welds must be smooth with no holes, high spots, lumps, or pockets. Grinding is required to eliminate sharp edges and high spots. Weld metal shall be used to fill in undercut or pits. Inside of Tank or Vessel 4:27.. Elk AM DO DON'T FIGURE A3 All weld spatter shall be removed. 6 NACE International 189 SP0178-2007 Flanged Outlet Weld r ii., !NI fmm in.) Slip-On Flange Overall Lengthn Shall Be as Short + 1r0 \ Weld Neck as Possible Weld III r Flange I 1 gli MI I Round Corners Inside of Tank or Il Vessel Sharp DOCorners DON'T Pad Type Threads /41 , I / IhiliZ 57—A '4'44 /,pi, 5 Round These \ Corners Inside of Tank or Vessel lk Sharp Corner DO DON'T FIGURE A4 The outlets shall be flanged or pad-type rather than threaded. Within pressure limitations, slip-on flanges are preferred because the inside surface of the attaching weld is readily available for rounding edges and grinding. If operating pressure dictates the use of weld neck flanges, the inside surface of the attaching weld is in the throat of the nozzle, making repair of surface irregularities by grinding rather difficult. NACE International 7 190 SP0178-2007 Inside of Tank or Grind Smooth Inside of Tank or Vessel Vessel so, Gap DO DON'T Inside of Tank or Inside of Tank or Vessel Vessel Continuous Fillet Meld Weld Itk< Gap DO DON'T FIGURE A5 Butt welding shall be used whenever possible rather than lap welding or riveted construction. /� Inside of Tank or Inside of Tank or Angle / Vessel Vessel Stiffener DO DON'T FIGURE A6 Stiffening members should be on the outside of the tank or vessel. 8 NACE International 191 SP0178-2007 f._Roof Weld Inside=Eliminate Crevice Inaccessible for Grinding or „�-.-�„ Proper Lining Application Inside of Tank or Vessel Inside of Tank or Vessel Shell DO DON'T FIGURE A7 Roof-to-Shell Joint. Eliminate crevice and lap weld at roof-to-shell joint in a tank or nonpressure vessel. I .__ Pit(Anode) Pit(Anode) Steel I Steel 1Y(C1ode) L::cathode) rotective Protective DO DON'T FIGURE A8 Dissimilar metal (galvanic) corrosion occurs when, for example, an alloy is used to replace the steel bottom of a tank, or, in a similar circumstance,when alloy appurtenances must be a part of the construction of a vessel. If a lining is then applied to the steel and part of the alloy(usually 150 to 610 mm [5.9 to 24 in.]), any discontinuity in the lining exposes a small anode surface. Once corrosion starts, it progresses rapidly because of the large exposed alloy cathodic area to the much smaller anodic area. Without the lining,galvanic corrosion causes the steel to corrode at the weld area,but at a much slower rate. The recommended practice is to apply lining to all of the alloy as well as the steel,thereby eliminating the possible occurrence of a large-cathode-to small-anode surface. NACE International 9 192 SP0178-2007 Inside of Tank or Vessel Tank Shell --+ This area is inaccessible for lining application Screwed Nipple for Use During Internal Dished Head Fabrication and Heat Curing of Thermosetting Linings It is recommended that 1111111111111111 ■ the plug be left out for venting and the hole plugged — with grease to prevent Installation of Curved(Preferred)or Flat atmospheric corrosion of Plate,Fully Seal-Welded and Ground,to the threads. Eliminate Inaccessable Area for Proper Surface Preparation and Lining in Mufti-Compartment Tanks Constructed with Dished Heads Between Compartments FIGURE A9 A technique (detail of fabrication) to allow for good continuity of lining application for inaccessible areas such as those in multicompartment tanks or vessels. �2S mm(1.0 in.)thread nipple 1111111 . ' . f en alloy sig fleange is required, the designer should consider 111 the use of insulating sleeves and washers as a protection Slip-on Flange ■ 50 mm ■ against galvanic corrosion. (2 in.) inside Overall length shall be as short as possible. WNW ANEW1 Line completely to bolt Inside of Tank or Vessel circle. Grind and Radius FIGURE A10 Minimum 50-mm(2-in.)diameter nozzle required for most thin-film linings.Thicker-film linings may require a larger-diameter nozzle. This diagram also illustrates fabrication practice where a threaded connection is required in a tank or vessel that requires a holiday-free lining. 10 NACE International 193 SP0178-2007 APPENDIX B: Recommended Responsibilities This appendix is a list of recommended responsibilities that B1.3 Responsibilities of the Designer should be assigned to the purchaser, designer, fabricator, lining applicator, and inspector in order to obtain a properly B1.3.1 The designer should be responsible for designed and fabricated tank or vessel for interior lining. including the required fabrication and surface details on all sketches and drawings related to the tank or vessel. B1.1 Joint Responsibilities B1.4 Responsibilities of the Fabricator B1.1.1 The purchaser, designer, fabricator, lining applicator,and inspector(s) should review and agree to B1.4.1 The fabricator should be responsible for the requirements involved before contractual adhering to the fabrication and surface finish details agreements are made. shown on the working drawings and described in the tank or vessel specifications. 81.1.2 The purchaser, in agreement with the fabricator and lining applicator, should assign B1.4.2 Responsibility for an inspection of the blast or responsibility for inspection of fabrication, surface any additional welding, grinding, or surface finishing finish, and lining application, and such responsibility that may be revealed by the surface preparation for should be defined in all contracts. lining, plus any subsequent reblasting, should be defined in the lining contract. B1.2 Responsibilities of the Purchaser(Owner or User) B1.4.3 The fabricator, when checking the quality of B1.2.1 The purchaser should be responsible for the weld, should use only those materials that can be specifying and/or approving the detail requirements for readily and thoroughly removed by the fabricator after design, fabrication, and surface finish to all parties completion of the inspection procedure. concerned. B1.5 Responsibilities of the Lining Applicator B1.2.1.1 The detailed requirements should be fully described in writing and include drawings of B1.5.1 Responsibility for additional welding, grinding, the tank or vessel to be fabricated and lined and or surface finishing that may be revealed by the surface service requirements. preparation for lining, plus any subsequent reblasting, should be defined in the lining contract. 81.2.1.2 The purchaser should advise the designer, fabricator, lining applicator, and all B1.6 Responsibilities of the Inspector(s) inspectors of the detailed requirements, including time schedules, inspection, and B1.6.1 A qualified inspector whose qualifications and acceptable requirements,in writing. affiliation are acceptable to all parties should be responsible for the verification of fulfillment of design, fabrication,and surface finish requirements. NACE International 11 194 ° C C To O 0 Vi:C -o N d a1 C ° > a) f0 U( �° O ° N Q a)'Q . 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N W W 7 LL W W w 0w mW W S ', ma a ❑ a w: W m Z m J 9W ' LP a WW¢ 2WiCWWmHHUH '32 Sc Z Z '.'• 2 - N w v o m 0 m o 7 0 (0 � 0 r' N N N N N N N N H s � O w U H K z a 'Lt a o w O ¢ r =• w 2 ?c- o a w z Y 7 = U Fi N 8 Fr 0 U W • ¢ a r " z o • U z a .- TJ N m rD w r a o _ O r z 0 W O U U W 6 n c7 r ... K Z W = U U Z O F ' w U F = Q � r U O• U o r — W z 2 r N• W U � 0 c. A r.O F < L>' F W LL U a m N F W Q r Z F O m ❑_ O z i z 4 0 r z o o U m ¢ � U z w w 3 a o 0 a U w az O r m Z ZO W Q ¢ U 3 0 z z 0 • W J = 0 a. ~ r ¢ O ¢ m F a O Y - aP K .i U d .g 0 W OLL _, _ O m = 0 0 x 0 U F m N W 2 ¢ Z O g W O r RECOMMENDATION LETTER PROVIDED AT MEETING BADGER STATE INSPECTION, LLC Water Tower Specialist/Antenna, Evaluations, Inspection P.O.Box 157 Osseo,WI 54758-715-533-8686 September 11, 2018 Mr. Eric Volk Water Superintendent Elk River Municipal Utilities 13069 Orono Parkway Elk River, MN 55330 Re: Reconditioning and Painting Project 500,000 Gallon Spheroid Auburn Street Water Tower Bid Evaluation Dear Mr. Volk: The bid opening for the above referenced project was held on September 10, 2018 at 1:00 p.m. The following five (5) bids were received as follows: BIDDER TOTAL BID AMOUNT Classic Protective Coatings, Inc. $497,350 Osseo Construction Co. LLC 537,400 George Kountoupes Painting Co. 652,350 TMI Coatings, Inc. 878,350 Viking Industrial Painting 1,001,901 (corrected) The Engineer's cost estimate for this project was: $628,300.00. Badger State Inspection (BSI) recommends that Classic Protective Coatings, Inc. be awarded the contract for the reconditioning and painting of the 500,000 gallon spheroid Auburn Street Water Tower, for the bid amount of$497,350.00. I called Brad Smith of Classic Protective Coatings, Inc. and asked them if their total bid amounts were correct, and he said yes. We have reviewed the qualifications supplied by Classic Protective Coatings, Inc. BSI finds that Classic Protective Coatings, Inc. meets the requirements of the Project Specifications. It is our understanding the Notice of Award and the Contract Documents will be sent to the contractor selected by Elk River Municipal Utilities. If you have any questions regarding BSI's recommendation please call me at 651-462-7266 or Kelly Mulhern at 715-533-8686. Sincerely, Robert E. Kollmer Badger State Inspection, LLC Certified NACE International Coatings Inspector No. 1291