1o. Plans & Specs for Lake Drive East; Advertize for Bids 1
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CITY OF
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690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MIN NEbSO.TA 55317
" (612) 937-1900 • FAX (612) 937-5739 10° '� fi rin stator
Endorsed_.� b.W
I MEMORANDUM �`'o`it'eu°-;,,4
TO: Don Ashworth, City Manager �L�' 'A° "`
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Date 5.:.bmIted to C,- SAR
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FROM: Gary Warren, City Engineer --
Date Submitted to iouncil
1 DATE: March 5 , 1990 3 - 1x-50
SUBJ: Approve Plans and Specifications for Murray Hill Water Tower
I Rehabilitation and Painting, Improvement Project No. 89-24;
Authorize Advertising for Bids
11 On February 12 , 1990, the City Council accepted the evaluation
report and recommendations for rehabilitating and painting the
Murray Hill water tower. As will be recalled, this tank was
1 constructed and last painted in 1973. Plans and specifications
have been prepared by AEC Engineers and reflect the
rehabilitation recommendations of the evaluation report.
IThe estimated cost for the rehabilitation is $100 , 300 . The
project was budgeted in the 1990 Water Expansion Capital Project
fund ( #402 ) at $120, 000. As identified in the plans and
1 specifications, the tower is to be painted with the same painting
scheme utilized on the ground storage reservoir and the downtown
elevated tank. Similarly, the word "Chanhassen" will be painted
Ion the north and south faces of the elevated structure identical
to the downtown tank.
II It is therefore recommended that the attached plans and
specifications for the Wirray 'Aili water tower rehabilitation and
painting as prepared by AEC Engineers .be approved and authorized
for bidding.
1 ktm
1 Attachments: 1. Plans and Specifications.
2. February 7, 1990 staff report.
II c: Bob Kollmer, AEC Engineers
Jerry Boucher, Utility Superintendent
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II ' ,4 Le .
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CITYOF ......._
1 CHANHASSEN
1 .:. ,.... 690 COULTER DRIVE• P.O. BOX 147• CHANHASSEN, MINNESOTA 55317
(612)937-1900• FAX(612)937-5739 by city AdrA it :r,
IMEMORANDUM Endorse t.". Awn
Mullett
IRU: Don Ashworth, City Manager L!-" �
FROM: Gary Warren, City Engineer bete Sub^'ed to co^ -4sim:
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DALE: February 7, 1990
1 Date Su:-: to Co:;r,ca
a - ra-90 t
SUBJ: Accept Inspection Report for Murray Hill Water Tower and
1 - Authorize Preparation of Rehabilitation Plans and
Specifications, Improvement Project No. 89-24
IIOn November 8, 1989, the City's consultant, AEC, inspected our 200,000 gallon
pedestal water storage tank located off of Murray Hill Road. Similar to the
downtown storage tank, an inspection report was completed and reoamnendations
II made for upgrading and painting this storage tank. Attached are the summary and
reoamlendations from this report for your .information. The full report is
available for review in the Engineering Department. As noted therein, AEC has
1 estimated the total cost of repairs and painting to be approximately $100,300.
This does not include the cost of .security fencing around the tower which the
City would contract separately for.. The tank was constructed in 1973 and has
IInot been painted or rehabilitated since.
This project was budgeted in the 1990 Water Expansion Capital Project Fund (No.
402) at $120,000 (see Attachment No. 2).
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It is desirable to havethe plans and specifications for the repairs and
painting prepared at this time such that bids can be taken in the near future.
1 The actual work, which is estimated to take five Weeks, will be scheduled with
the low bidder for sane time outside of the City's 'peak water consumption months
since the tower obviouslywillbe taken t.of service Lor these repairs. Nbst
likely we willbe looking at a September/October timneframe for:.the actual
I repairs to be done unless the low bidder is able to ccmplete`this work before
July. d: .
1 It is therefore recommended that the C t accept the inspection report as pre-
pared by AEC Engineers & Designers and that AEC be authorized to prepared the
rehabilitation plans and specifications for the City.
II klbm
Attachments: 1. Inspection Report summary and recommendations.
II2. Fund 402 Capital Project Fund.
c: Jack Kollmer, AEC
Jerry Boucher, Utility Superintendent
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INTERIOR AND EXTERIOR INSPECTION REPORT
200,000 GALLON (200 MG) PEDESTAL SPHEROID I
MURRAY HILL TOWER
CITY OF CHANHASSEN, MN ,
AEC PROJECT NO. MN 901
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BY
AEC - ENGINEERS AND DESIGNERS
511 ELEVENTH AVENUE SOUTH
MINNEAPOLIS, MN 55415
TELEPHONE: 612-332-8905
CITY OF CHANHI SSEN
RIMER
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JAN 151999
„
ENGINEERING DEPT.
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AEC �
In
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511 Eleventh Avenue South
AEC - ENGINEERS & DESIGNERS Minneapolis,Minnesota 55415
612/332-8905
ELEVATED WATER TANK INSPECTION - No. MN 901
IClient: City of Chanhassen
Contact Person: Jerry Boucher
1 Telephone: 612/474-2086
Tank Description: 200 MG Pedestal Spheroid
1 Tank Location: Behind Minnetonka Jr. H.S.
Type of Coatings: Interior: Zinc
Exterior: Alkyd
1 Inspected by: Robert E. Koilmer
Date of Inspection: November 8, 1989
1
1 1.0 SUMMARY
1 It appears that the tank was last coated in 1973. The coating
is in poor condition and is non-repairable. The tank requires
a complete new interior and exterior coating.
1 Structurally, the tank is sound. However, various structural
modifications such as additional vents, manways and
miscellaneous repairs are recommended.
1 It is estimated that the complete recoating plus the
recommended modifications and repairs will cost approximately
II $100, 300.00 and take 5 weeks to complete.
These cost estimates represent the current pricing structure.
1 If you plan to proceed with the coating of this tank, the
sooner the specifications are ready for bidding, the more
competitive the bids will be.
1 The tank painting should be first inspected within the warranty
period, and every three years thereafter.
I In our opinion, if all the recommendations are followed and the
tank is inspected regularly, the new coating should last 15 to
20 years with only minor repairs. With proper maintenance, the
IItank will provide many years of service.
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Branch Office: 13807 Village Mill Drive • Midlothian,Virginia 23113 • 504/379•3944
Page 2
City of Chanhassen
AEC Project No. MN 901
2.0 RECOMMENDATIONS
The photographs referred to in this section are in Appendix A.
All drawings are found in Appendix B. The surface preparation I
requirements for all repairs or new welding are described in
Appendix C.
2.1 Interior Structural
2.1.1 Weld the unwelded interior seams on the two roof I
manways. See photo 2.
2.1.2 Weld the interior seam on the 3 x 3 ft. square, roof
erection patch plate . See photo 3.
2.1.3 Weld the eight (8) partially unwelded vertical butt
seams on the top 2 feet of the shell torus section.
This area is above the High Water Level (HWL) and
adjacent to the roof. See photo 4.
2.1.4 Remove the eight (8) shell erection angles by air arc
gouging or cutting torch. Repair surface by welding
or grinding in accordance with Appendix C. See
photos 5 and 6.
2.1.5 Seal weld the intermittently welded stiffner rings on
the dry well tube. There are four (4) such stiffners
located below the High Water Level (HWL) . Refer to
photo 7.
2.1.6 Remove all erection bracket scab marks below the High -
Water Level (HWL) by air arc gouging, cutting torch,
or grinding. There are approximately 100 erection
bracket scab marks. Repair the tank surface by
welding or grinding in accordance with Appendix C.
2.1.7 Remove the existing interior reservoir ladder, on the I
dry well tube. See photos 2 and 8.
2.1.8 Replace the 18 inch round manhole gasket in the tank
bowl. See photo 14.
2.1.9 Add a "T" handle wrench to the drain plug in the tank
bowl. This will facilitate opening the drain when
cleaning the tank. See photos 8 and 9.
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AEC
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Page 3
City of Chanhassen
AEC Project No. MN 901
2.1.10 Photo No. 8 indicates that the top of the drywall
tube is not connected to the top of the tank. This
is not the normal practice as it introduces high
stresses in the base of the tube. We recommend that
the tower manufacturer be contacted and methods of
attaching the tube to the tank roof be discussed.
2.2 Interior Wet Coating
2.2.1 After all structural repairs are completed, the
entire tank surface should be abrasive blasted and
coated with a light colored polymide epoxy system,
similar to Tnemec Series 20 Pota-Pox Epoxy.
2.2.2 For examples of current conditions and coating
failures see photos 2 through 11.
11 2.2.3 Interior Dry Coating
2.2.4 The interior dry coating is in poor condition.
Because of the age, and lack of intercoat adhesion,
the coating is non-repairable and needs complete
replacement with an epoxy coating system. See photos
12, 13 and 14.
2.3 Exterior Structural
2.3.1 Install one (1) 24-inch round, AWWA hinged
ventilation roof manway, approximately 180 degrees
from the existing manway. This manway will provide
additional ventilation during the interior surface
preparation and coating. For a typical manway, see
AEC Standard Drawing.
2.3.2 Replace the tank vent/finial with a removable top
mushroom vent, similar to the AEC Standard Drawing in
Appendix B. The new vent and vent screen design
should meet AWWA D100 and local Health Department
Regulations. The removable top will improve
ventilation and allow access to the_ tank interior
during reconditioning. The existing vent does not
meet tight roof. See photo 15.
2.3.3 Replace the overflow pipe screens to prevent birds
and insects from entering the reservoir. Use a
corrosion resistant, heavy-gauge screen with a mesh
' size no smaller than 1/4 inch square opening. See
photo 16.
AEC
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City of Chanhassen
AEC Project No. MN 901
2.3.4 Install a concrete splash pad under the existing
overflow pipe. See photo 16. 1
2.3.5 To prevent tower base plate corrosion from trapped
soil moisture, lower the existing ground grade around
the water tower so that the foundation is at least 4
to 6 inches above grade level. See photos 17, 18 and
20.
2.3.6 Repair damaged anchor bolt chair by welding. See
photo 18.
2.3.7 Install a 8-12 foot high chain link fence with
anti-climb device, around the reservoir to prevent
access and vandalism by unauthorized personnel. See
photo 17.
2.3.8 Remove insulation on inlet piping and abrasive blast
and epoxy coat exterior of piping from valve pit to
the reservoir bowl. Reinstall insulation. See
photos 21 through 24.
2.4 Exterior Coating
2.4.1 Due to age, chalking, deterioration, lack of I
intercoat adhesion, and lack of resistance to
mechanical damage (rocks) and graffiti, the entire
exterior coating should be removed and replaced with
an epoxy/urethane coating system, similar to those
manufactured by the Tnemec company. See photos 15
through 20. 1
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AEC I
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Page 5
City of Chanhassen
AEC Project No. MN 901
3.0 ENGINEERING COST ESTIMATES
3.1 Interior structural repairs $ 8, 300.00
' 3.2 Interior coatings wet and dry
Type of coating - epoxy system $ 33,250.00
11 3.3 Exterior structural repairs $ 10, 650.00
(excludes grading and fence)
3.4 Exterior coating
Type of coating - epoxy/urethane
system $ 30,500.00
3.5 Logo and Lettering $ 3, 600.00
3.6 Engineering specifications and
inspection fee $ 14,000.00
3.7 Estimated Total Cost $ 100, 300.00
3.8 Estimated job duration: Five weeks.
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' Report submitted by:
AEC - ENGINEERS AND DESIGNERS
I .�
':i� 0Ti
' John R. Buzek, P.E.
President
.�4. 4/info
e
' Enclosures - Field Inspection Report
Appendix A
Appendix B
' Appendix C
1546M
AEC
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t 511 Eleventh Avenue South
AEC - ENGINEERS & DESIGNERS Minneapolis,Minnesota 55415
II
ELEVATED WATER TANK INSPECTION REPORT 612/3324905
SECTION I--DESCRIPTION 11
PROJECT NO. MN901
DATE OF INSPECTION November 8, 1989 II
AEC INSPECTORS 1) R. Kollmer 2) S. Mulhern I
TANK OWNER City of Chanhassen
OWNER'S CONTACT Jerry Boucher, Utility Sup. I
TANK LOCATION: Street/City/State Behind Minnetonka Jr. High Sch
IITANK DESIGNATION Murray Hill
TYPE OF TANK Spheroid - single pedestal I
MANUFACTURER AND CONTRACT NO. P.D.M. No. 22703
CONSTRUCTION DRAWINGS AVAILABLE No 1
YEAR BUILT 1973
CAPACITY 200,000 gallon (200 MG. ) II
TYPE OF CONSTRUCTION: Welded Yes Riveted
I
NUMBER OF SUPPORT COLUMNS One - dry riser
RESERVOIR DIAMETER 40 ft. I
HEIGHT: Overall 137'+/- Balcony N/A
HEIGHT TO: H.W.L. 132 ft. L.W.L. 102 ft II
TYPE OF ACCESS TO TANK INTERIOR Ladder in dry riser I
EXISTING COATING INFORMATION
INTERIOR ' . EXTERIOR I
DATE LAST COATED 1973 1973
COATING CONTRACTOR Unknown Unknown II
SURFACE PREPARATION Unknown Unknown
PAINT SYSTEM Zinc Alkyd I
PAINT MANUFACTURER Unknown Unknown
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Branch Office: 13807 Village Mill Drive Midlothian,Virginia 23113 • 504/379.3944
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i is FUND: 402 WATER EXPANSION
FUNCTION: CAPITAL PROJECT RN)
1 1990 BUDGET
Commentary
This fund derives its money from water hook-up charges and is dedicated to pay
oversizing and other general benefit costs associated with the water utility
• system. Revenue into this fund fluctuates greatly in that collections are
based on development in areas where trunk costs were not assessed as part of
the construction project.
FIVE YEAR CAPITAL IPFROVE?QJT PROGRAM
FOR THE CHAN AS'SEN WATER SYSTEM
YEAR DESCRIPTION ESTIMATED
COST
1989 Painting and general repair of West 76th Street
water tower 75,000
.� Remove pumps and liner at well *4 and
overhaul/repair as necessary 25,000
Construct Lake Lucy Road Trunk Watermain 100,000*
Modify Well *3 to increase capacity 50,000
General Repairs 10.000
260,000
1990 County Road 17 Watermain 60,000
i ' ; Blower & grates for chlorine rooms 15,000
�' Auxiliary Pump for Booster Station 20,000
.�-T Water tower general repair of Murray Hill ,��-
120,000
: Consumption telemetry system to monitor all
; operations of wells & reservoirs. 30,000
General Repairs 30.000
275,000
li 1991 Remove pumps and liner at well *2 and
overhaul/repair as necessary 30,000
Debt retirement, Bonds of 1990 70,000
' General Repairs 15 000
115,000
1992 General Repairs 15.000
15,000
1993 General Repairs 30.000
30,000
-79-
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CITY OF C RANHA T EN, MINNESOTA ,
PROJECT # 89-2
SPECIFICATIONS FOR CLEANING, '
REPAIRING & PAINTING
200 MG SINGLE PEDESTAL SPHEROID
MURRAY ITHJ TOWER
I
BY
CITY OF CHANHASSEN
AEC-ENGINEERS&DESIGNERS MEM
511, 11TH AVENUE SOUTH MAR 0 7 1990
MINNEAPOLIS, MINNESOTA 55415 1
TELEPHONE 612-332-8905 ENGINEERING DEPT.
I
I hereby certify that this plan, specification I
or report was prepared by me or under my direct
supervision and that I am a duly Registered `i J : t:IA tlt �1
t Professional Engineer under the laws of the tlAbi tnu" NtN II
State of Minnesota rUA
John R. Buzek, P.E.
Registration No. 11718 Dated: , 1990
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( BID DATE: April 6 1990 1
2:00 P.M.
AEC File No. MN 901
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SPECIFICATIONS
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CONTENTS
1. Description of Project
1 2. Intent
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3. Inspection of Tank
4. Work Done by Owner
5. Workmanship
6. Surface Preparation
7. Coating Materials and Quality
8. Surface Coating
9. Health and Sanitary Facilities
10. Cleanup and Sterilization
11. Ventilation and Safety Requirements
I! 12. Starting Date, Completion date
and Liquidated Damages
I! 13. Repair Work
14. Superintendent
15. Preconstruction Meeting and Inspection Work
16. Use of Premises
17. Sterilization of Tank
18. Guarantee
19. Payment
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1.0 DESCRIPTION OF PROJECT
1.1 This contract involves the cleaning, coating and repairing of
the 200 MG Single Pedestal Spheroid located at 2230 Melody Hill
Road (behind Minnetonka West Jr. High School) , owned by the City
of Chanhassen, MN.
The inspection report describing the present condition of the tank
is in Appendix A including photographs of tank condition and
details.
The tank modification drawings are in Appendix B. 11
The tank logo and lettering drawings are in Appendix C.
{ The surface preparation requirements which must be followed for
all welding and grinding work are in Appendix D.
Included in this contract are the following: ,
1.2 Structural Repairs and Modifications
1.2.1 The following Repairs and Modifications are required - Bid
item No. 1. 1
1) Weld the interior seams of the existing two (2) roof
manways and the one (1) 3 x 3 foot erection plate. See 11 Appendix A: photos 2, 3 and Appendix B: Tank Drawing sheet
No. 1.
2) Seal weld the eight (8) partially unwelded vertical seams,
(approximately 16 lineal feet) on the shell torus section.
See Appendix A: photo 4 and Appendix B: Tank Drawing sheet
No. 2. ,
3) Remove the eight (8) erection angles by air arc gouging,
cutting torch or grinding. See Appendix A: photos 5 and 6.
Repair shell plate by welding and grinding per Appendix D.
4) Seal weld on the interior of the reservoir the bottom
seams of the four (4) stiffener ring on the access tube.
See Appendix A: photo No. 7 and Appendix B: Tank Drawings
Sheet No. 3.
5) Remove the interior reservoir ladder located on the dry 11
well tube by air arc gouging, cutting torch or grinding.
See Appendix A: photos 2 and 8. Repair shell plate by
welding and grinding per Appendix D. I
6) Replace the gasket on the 18 inch round manway on the
bottom of the access tube as specified in Section 8.5. I
7) Install a "T" handle to the drain plug in the bottom of
the reservoir. See Tank Drawings Sheet No. 4.
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8) Modify the existing manway/vent. See Tank Drawing sheet
11 No. 5.
9) Install a new 24 inch diameter, mushroom style screened
roof vent assembly, similar to AEC Standard Drawing or
equivalent. See Tank Drawings, Sheet 6.
10) Replace the overflow pipe screen assemblies to prevent
access into the reservoir. Use a corrosion resistant,
heavy-gauge screen with a mesh size no smaller than 1/4
inch square opening.
12) Repair by welding the damaged anchor bolt chair. See
Appendix A: photo No. 18 and Appendix D.
13) Install an dry well tube support assembly. See Appendix A:
photo No. 8 and Appendix B: Tank Drawing sheet No. 7.
1.3 Surface Repairs
1.3.1 The following Surface Repairs are required - Bid item
No. 2.
1) All erection scab marks (approximately 100) shall be
repaired by grinding and/or welding. All weld splatter
shall be removed by grinding. See Appendix D - Surface
Preparation Requirements.
I! 2) For bidding purposes it is estimated that there are
approximately 48 man/hours to perform the work. This work
will be monitored and verified by the Engineer in the
I! filed. Increases or decreases in the amount of the work
and the appropriate contract price adjustments, will be
made per Section GC-22 Modifications.
I! 1.4 Interior Wet Sandblast and Recoating
1.4.1 Complete Interior Wet Surface - Bid item No. 3.
1) Blast entire interior to a SSPC-SP-10-85 Near White Metal
1! blast.
2) Apply two coats of polyamide epoxy as specified in section
I! 8.1 of this specification.
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1.5 Complete Exterior and Interior Dry Sandblast and Recoating 1
1.5.1 Complete Exterior and Interior Dry - Bid item No. 4.
1) Blast entire exterior, including the dry riser interior,
dry well tube, ladders, conduit, safety cage, overflow
pipe, platforms, exterior of the inlet/outlet pipe, Valve
pit piping and misc. items etc. , to a SSPC-SP-6-85
Commercial Blast.
2) Apply an epoxy/urethane coating system to the exterior as '
specified in Section 8.2.1 of this Specification.
3) Exterior coating shall be by brush and roller only. 1
4) Apply an epoxy coating system to the interior dry surfaces
as specified in Section 8.2.3 of this Specification. I
1.6 Insulated Inlet/Outlet Pipe
1.6.1 Insulated Inlet/Outlet piping - included in Bid item No.
4, Section 1.5.1.1
1) Under the direction of the Engineer remove existing
insulation from exterior of the inlet/outlet pipe.
2) Pack insulation in suitable cardboard containers for I
storage by the Owner during reconditioning.
3) Blast the inlet/outlet pipe exterior (including valve pit t
piping) to a SSPC-SP-6-85 Commercial Blast.
4) Apply an epoxy coating system as specified in Section
8.2.3 of this Specification.
5) Reinstall insulation to the inlet/outlet pipe.
6) Contractor to replace damaged insulation covering and
banding caused by his work.
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1.7 Tank Lettering
1.7.1 Tank Lettering - Bid item No. 5. 1
1) The required lettering and it's locations are shown in
Appendix C.
1.8 Clean and Sterilize Tank Interior I
1) Clean and sterilize tank interior per section 10.0 and 17.0. 1
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2.0 INTENT
2.1 It is the intent of these specifications that the Contractor
shall furnish all material, labor, equipment, machinery and
accessories necessary for the satisfactory completion of this
project in accordance with these specifications and the Engineer's
approval.
' 3.0 INSPECTION OF TANK
I! 3.1 Prospective bidders shall inspect the tank before submitting a
bid. Appointments for such inspections can be made by calling Mr.
Jerry Boucher Utilities Supervisor at (612) 474-2086.
3.2 No additional compensation will be allowed because of
Contractor's misunderstanding as to the amount of work involved or
his lack of knowledge of any of the conditions pertaining to the
I! work based on his neglect or failure to make examination of the
worksite.
4.0 WORK TO BE DONE _BY OWNER
I! 4.1 The Owner will operate all water valves in the watermains or
reservoir drains. Also any emptying, and refilling of the
reservoir will be done by the Owner's forces as directed by the
Engineer.
5.0 WORKMANSHIP
5.1 All work of this contract shall be done in a workmanlike
I! manner, by skilled personnel experienced in the particular type of
work being performed. The coating shall be performed using
approved methods, acceptable tools and practices and shall be
I! performed in a manner satisfactory to the Engineer.
5.2 Proceed with surface preparation and coating application only
when air and surface temperatures are above 50 degrees F and below
125 degrees F, and surface temperature is at least 5 degrees above
wet bulb air temperature reading. Coating shall not be applied to
dusty, wet, or damp surfaces, and shall not be applied in rain,
snow, fog or mist, or when relative humidity exceeds 85 percent.
No coating shall be applied when it is expected that the relative
humidity will exceed 85 percent or when the air temperature will
drop below 40 degrees F within 8 hours after the application of
the coating. If working conditions are questionable, the Engineer
shall make the decision and the Contractor shall accept his
interpretation as final and binding.
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5.3) Each coat shall be applied at the specified rate and in the It
manner recommended by the coating manufacturer and it shall be
well worked into the surface to which applied. No laps or brush
marks shall show. The film thickness of the coatings will be
measured and any readings below the specified film thickness shall
be corrected by applying an additional coat(s) . Where thinning is
necessary, only the products of the manufacturer furnishing the
coating, and for the particular purpose, shall be allowed. All
thinning shall be done strictly in accordance with the
manufacturer's instructions, as well as with the full knowledge
and approval of the Engineer. Dry film thickness will be measured
by means of the "Mikrotest" gage manufactured by the Nordstrom
Corporation of Amherst, Ohio or equivalent; and measurements of
wet mil thicknesses will be accomplished by use of the "Nordson"
wet film gage or such other gage as the Engineer might determine
as being satisfactory.
5.4 Care shall be given to insure a uniform coating carefully
worked with a brush around rivet heads, weld seams, scabmarks,
plate overlap, joints, and other irregularities in the surface. 11 Each coat shall be allowed to dry thoroughly before the next coat
is applied as required by the coating manufacturer's written
recommendations.
5.5 If the coating is applied by spraying, use suitable nozzles to
provide an adequate supply of air within the proper pressure range
to the liquid in the container and to the atomizing nozzle, all as ,
recommended by the coating and equipment manufacturers as being
best suited or necessary for the production of good work. All
necessary precautions must be taken to avoid spray fallout on and
the consequent damage to any works, improvements or properties of
either the Owner or of other parties, wherever located. The
Contractor shall be responsible for any and all damage resulting
from drifting of the spray. ,
5.6 NO EXTERIOR SPRAY PAINTING WILL BE ALLOWED. The exterior paint
application shall be by brush and roller only. The Contractor
shall take necessary precautions to avoid paint fallout on and the
consequent damage to any works, improvements or properties of
either the Owner or of other parties, wherever located. The
Contractor shall be responsible for any and all damage resulting
from drifting of the paint.
5.7 If applied by brushing, the coating shall be brushed on in one
{ direction, and then smoothed in a direction at right angles
thereto, so as to produce as uniform thickness of coating and as
complete a coverage as possible. Such two-directional brushing
`` shall be considered as "one coat" within the meaning of these
Specifications.
5.8 Application of the primer to the interior roof structural,
including "I" beams, compression ring(s) , support column(s) ,
attachment brackets, nut/bolt assemblies and roof plate overlap
seams shall be by brush or brush/spray application to insure a
uniform coat of primer thoroughly worked into and around all
seams, welds, bolt assemblies, plate overlap seams, beam flanges
and irregularities in the surface.
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5.9 UNFAVORABLE WEATHER CONDITIONS
5.9.1 No surface preparation or coating application work shall be
done under unfavorable weather conditions, unless the work is
adequately protected, and then only with the specific approval of
the Engineer.
5.9.2 The Owner intends to monitor temperature and humidity to
insure Contractor's compliance with the listed conditions.
' 5.9.3 The Contractor shall record the relative humidity, air
temperature, and surface temperature upon commencement and
completion of coating application for each day said work is
undertaken. The daily log shall be submitted to the Inspector for
comparison with the Owner's data and verification of compliance.
6.0 SURFACE PREPARATION
6.1 INTERIOR WET
6.1.1 Bid item No. 3 - The entire interior surface of the tank
shall be cleaned of all paint, grease, oil, rust, mill scale, and
other foreign or loose material. Cleaning shall be done in
accordance with Steel Structures Painting Council Specification
SSPC-SP-10-85, "Near-White Blast Cleaning". Before any primer or
paint is applied, metal surface shall be completely dry, dust
free, inspected, and approved by the Engineer.
6.2 :XTERIOR AND INTERIOR DRY
6.2.1 Bid item No. 4 - Exterior and interior dry surfaces of the
tank, including the inlet/outlet pipe shall be cleaned of all
paint, grease, oil, rust, mill scale, and other foreign or loose
materials before any primer or coating is applied. Cleaning shall
be done in accordance with the Steel Structures Painting Council
Specification SSPC-SP-6-85, "Commercial Blast Cleaning". Before
11 any primer or coating is applied, metal surfaces shall be
completely dry, dust free, inspected and approved by the Engineer.
6.3 BLAST CLEANING
6.3.1. Use proper equipment and abrasives when blast cleaning to
produce the mil profile recommended by the coating Manufacturer.
Do not reuse sand or flint abrasives.
1 24
6.3.2 The abrasive used shall be of the type that is graded as to I
proper size, shape and hardness. It shall be free of contaminants
and shall not embed itself in the blasted surface. Silica sand,
Flint, Garnet or Quartz type abrasives shall be chemically washed,
dried, dust, dirt and fines free, resistant to fracture
(shattering) , and contain no leachable contaminates. Synthetic
(non-metallic and non-siliceous) abrasives such as Silicon
Carbide, Aluminum Oxide and Refractory Slag products shall meet
the above criteria. The use of reduced or dust free abrasive
blasting is required due to close proximity of buildings and
parking areas. Prior to start-up of the project, samples of the
Contractor's selected abrasive shall be submitted to the Engineer
for testing and approval. Random field testing of the abrasive
shall be done, as directed by the Engineer to ensure the abrasive ,
used complies with these requirements.
6.3.3 The Contractor or his subcontractor shall be fully
responsible to provide a nuisance free environment during the
exterior tank abrasive blasting operation and to prevent the drift
of abrasive and existing exterior paint removed onto adjacent
property, streets or structures. Unless partial containment is
employed, the abrasive blasting operation will be prohibited in
wind over 15 miles per hour or when partial containment does not
effectively contain spent abrasive and existing paint removed. If
partial containment is utilized under this Contract the Contractor
shall employ the wind and wind direction to assist in the
containment and nuisance free environment objectives.
6.3.4 The Contractor or subcontractor expressly agrees to obey the
verbal or written direction and instruction of the Engineer,
Inspector or Owners Representative in determining when the
exterior sandblasting operation may proceed or must be suspended
due to excessive winds, or drift of dust, spent abrasive and paint
chips outside the area of the Owners property. I
6.3.5 All compressed air supply shall be properly equipped with
suitable oil and moisture separators to prevent contamination of
abrasives and/or blasted surfaces. These separators shall be of
the continuous bleeding or automatic dumping type. In order to
prevent contamination of abrasives and/or blasted surfaces, it is
recommended that the separators be installed at both the
compressor air outlet and the blasting pot compressed air inlet.
6.3.6. Stop abrasive blast cleaning in sufficient time to remove
all dust, spent abrasive and other foreign matter from and around
all blasted surfaces (including rigging and equipment) and to
allow the atmosphere to clear before any coating is done. Removal
of these materials shall be by clean brush or suitable industrial
vacuum with particular attention given to welds, pockets, poorly
accessible areas or any overhead areas.
6.3.7 Apply the first coat to all prepared surfaces, except that ,
there shall remain uncoated a 3 inch to 4 inch border of blasted
steel at the end of each work day. When blast cleaning resumes the
following work day, this border shall be reblasted up to and
including 1 inch to 3 inch of the previous primer coating.
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6.3.8 Take extra care during all blasting operations, to prevent
damage or abrasive impingement upon previously applied coated
areas.
11 6.3.9 A prime coat shall be applied within eight(8) hours after
sandblasting. When the humidity exceeds 80% the prime coat shall
' be applied within four (4) hours after sandblasting. If conditions
are questionable, the Engineer shall make the decision, and the
Contractor shall accept his interpretation as final and binding.
See paragraph 5.2 (Workmanship) for additional temperature and
humidity limitations.
6.3.10 A daily inspection of the separators and compressed air
11 supply will be required to insure cleanliness of all compressed
air supplied for abrasive blasting. This test will be performed by
a blotter test. A clean white Blotter is held, no more than 18
inches, from the air supply, down stream of moisture and oil
separators. The air supply is directed at the Blotter for approx.
(2) two minutes. The Blotter is then examined visually for signs
of oil and moisture. A clean blotter at test completion means a
successful passing of the air supply test. Failure to pass the
compressed air test will be justification for rejection of
abrasive blasting performed that day. The Engineers discretion
will be final in this determination.
7.0 COATING MATERIAL AND OUALITY
7.1 The coating and coating products used to complete the project
shall be as specified in Section 8.0 or an approved equal. The
1 products of other manufacturers comparable in quality and type
will be acceptable if the following conditions are met:
1) Satisfactory data is submitted on past performance of the
product on other water storage tanks.
2) The product complies with State of Minnesota Health Department
standards.
3) The Engineer approves the product.
4) No request for substitution shall be considered unless prior
written approval has been obtained five (5) days prior to the bid
opening.
5) All materials shall be brought to the job site in the original
sealed and labeled containers of the coating manufacturer and
shall be subject to inspection by the Engineer.
7.2 The Contractor shall submit to the Engineer, immediately upon
completion of the job, Certification from the manufacturer
indicating that the quantity of each coating purchased was
sufficient to coat all surfaces. Such Certification shall make
' reference to the square footage figures provided to the
manufacturer and the Engineer by the Contractor.
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7.3 All coating ingredients shall conform to current applicable r
specifications of the American Society for Testing and Materials.
No coating materials shall be reduced or thinned except as
specified or recommended by the manufacturer of the coating. The
coatings shall be thoroughly mixed and kept thoroughly stirred
during application.
7.4 All coating for the interior surfaces which will or may come
in contact with the storage water shall be a tasteless and
nonpoisonous product designed for such usage and approved by the
State of Minnesota Department of Health.
7.5 The Contractor shall provide adequate job site storage for all
coating materials, thinners, rags and waste materials, per the
manufacturers shipping and storage requirements, State and Local
regulations, the Engineers specifications, or as directed by the
Engineer. Adequate job site storage facilities shall be defined as
any temporary job site trailer, building or enclosed van providing
shelter and temperature protection to stored coating materials,
thinners and solvents which meet State and Local regulations.
}
8.0 SURFACE COATING AND MATERIALS
8.1 INTERIOR COATING
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8.1.2 Bid item no. 3 - The tank interior shall be coated with
products manufactured by Tnemec Corp. Inc. or approved equal, as
outlined below. ,
1. Tnemec Co.
Tnemec Pota-Pox Series 20 coating. '
Primer # 1255 Beige, 4.0 - 6.0 mils dry film thickness.
The D.F.T. of the primer at any individual spot measurement
location shall be 4.0 mils minimum.
Finish # AA90 White, 4.0-6.0 mils dry film thickness.
The total dry film thickness including the primer and finish
coat shall be 8.0 mils minimum - 12.0 mils with an average of
10.0 mils. The minimum dry film thickness of the coating at
any individual spot location shall be 8.0 mils
8.2 EXTERIOR COATING
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8.2.1 Bid item No. 4 - The tank exterior surfaces shall be coated
with products manufactured by Tnemec Corp. Inc. or approved equal,
as outlined below.
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1! 1. Tnemec Co.
Primer - Tnemec Hi-Build Epoxoline Series 66-AA90 White, 4.0
- 6.0 mils DFT.
The D.F.T. of the primer at any individual spot measurement
location shall be 4.0 mils minimum.
Finish - Tnemec Endurashield Series 71-BB82 Cumulus 2.0 - 2.5
mils DFT or Tnemec Endurashield III Series 73-BB82 Cumulus
2.0 - 3.0 mils DFT .
The total dry film thickness including the primer and the
finish coat shall be 6.0 mils minimum - 8.5 mils with an
average of 7.0 mils DFT. The minimum dry film thickness of
the coating at any individual spot location shall be 6.0
mils.
8.2.2 Exterior lettering finish color to match Tnemec No. BG12
Fossil.
8.2.3 The interior of the tank dry surfaces including the
inlet/outlet pipe, shall be coated as outlined below.
2. Tnemec Co.
Primer/Finish - Tnemec Hi-Build Epoxoline Series 66 - AA90
I! White.
The total dry film thickness including the primer and the
x'Y g P
finish coat shall be 6.0 mils minimum - 8.0 mils with an
I! average of 7.0 mils. The minimum dry film thickness of the
coating at any individual spot location shall be 6.0 mils.
I! 8.3 TANK LETTERING
I! 8.3.1 Bid Item No. 5 - The Contractor shall paint the new
lettering at the two (2) designated lettering locations. Any
techniques, such as the use of a template, that must be utilized
shall be the responsibility of the Contractor, and shall be done
without additional compensation. The Lettering and the exterior
tank colors shall be as specified in Section 8.2. The details are
shown in Appendix C.
8.4 EPDXY CAULK
8.4.1 The tank interior epoxy caulk shall be with products
manufactured by Tnemec Co. or Pennsbury Coatings Corp. as outlined
below.
I! 1. Tnemec Co.
Tnemec Seam Sealer # 62-1440
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2. Pennsbury Coatings Corp. 11
Pennsbury Penn-steel Epoxy Seam Sealer 4 55-G-155 ,
8.5 GASKET MATERIAL
8.5.1 For manways that use a flat style gasket, the gasket is 1/4
inch thick and use either a Neoprene or a EPDM material with a
durometer hardness of 50 on the Shore A scale.
8.5.2 For manways that require an 3/4 inch, round, solid core, 18
or 24 inch gasket, Buna-N Rubber with a durometer hardness of 50
on the Shore A scale, contact Power Process Equipment, Inc. , for
ordering at (612) 937-1000.
8.6 AREAS TO PROTECT DURING COATING OPERATIONS
8.6.1 Do not coat over vent or overflow screens, ladder safety
equipment devices, aircraft warning or obstruction lights and
miscellaneous antenna equipment. I
9.0 HEALTH AND SANITARY FACILITIES '
9.1 Prior to commencing any of the work on this contract and
thereafter at all times of any said work, the Contractor shall
provide a suitable self-contained type privy similar to such as is
available from Satellite Service Company; said privy shall be
satisfactorily serviced and kept in a sanitary condition at all
times.
9.2 No one, the Contractor and all persons in his employment or
under his control included, shall work in the tank if he has been
under a physician's care or has needed physician's care within a
seven day period prior to entering or working on said tank.
10.0 CLEANUP AND STERILIZATION
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10.1 On completion of the work on the interior of the tank, the
Contractor shall remove all dirt and litter and leave all surfaces
in reasonably clean condition, scrubbing the same with water and
approved soap or other cleaning agent, as necessary. When this has
been completed, the final sterilization of said interior will be
done by the Contractor at no cost to the Owner. I
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10.2 The Contractor shall, at all times, keep the premises free
from accumulations of waste material or rubbish caused by his
employees or work. He shall clean-up abrasive material on public
and private property on a regular schedule as directed by the
Engineer. All unneeded construction equipment shall be removed
from the site and all damages, repaired expeditiously so that the
' public and adjacent property owners are inconvenienced as little
as possible.
' 10.3 During exterior sandblasting and coating operations, the
Contractor shall provide adequate protection to adjacent
structures and property to prevent damage to these structures and
property by his operations. The Contractor shall also perform
intermittent or periodic clean-up of adjacent grounds to prevent
the accumulation of sandblast sand and debris caused by his
operations. This shall include but not be limited to, sidewalks,
streets, driveways, yards, and roof tops.
10.4 On or before the completion of work, the Contractor shall,
unless otherwise directed in writing, remove all temporary works,
tools and machinery or other construction equipment placed by him.
1 He shall remove all rubbish from any grounds which he has occupied
and shall leave all of the premises and adjacent property affected
by the operation in a neat and restored condition satisfactory to
the Engineer.
11.0 VENTILATION AND SAFETY REQUIREMENTS
11.1 The Contractor shall maintain adequate and continuous
t explosion-proof ventilation during all surface preparation and
coating operations and during all recoat and curing periods. This
I! ventilation shall be of the suction type and shall be of
sufficient capacity to maintain throughout the tank interior a
clear atmosphere that is well below explosive and toxic limits.
11.2 Ventilation fans used at roof manways and vent openings shall
have a minimum free air capacity of 6200 CFM.
I! 11.3 Arrange the ventilation system, including all fans and
temporary ductwork, so that fresh air is drawn into the tank at
the bottom and is exhausted at the top with an upward air movement
pattern within the tank that permits no still air spaces to exist
in any area. Give particular attention to floor level or lower
spaces and pocket areas where heavier-than-air solvents and
particulate matter are likely to accumulate. Said ventilation
I! shall be sufficient for the removal of dust, coating fumes or
other volatile gases and moisture to such an extent as to prevent
any undesirable accumulation of any thereof to the hazard of the
' workmen or the work.
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11.4 All electrical equipment, tools, and ventilation fans shall I
be explosion-proof and/or non-sparking and shall be maintained in
good working order. Spray equipment shall be as recommended by, or
acceptable to the coatings manufacturer, and shall be thoroughly
cleaned before and after use with the appropriate cleaning
solvents.
11.5 Provide adequate explosion-proof lighting during all surface
preparation and coating operations. This lighting shall be
sufficient to illuminate clearly the working area without shadows. 1
11.6 In the event heating devices are used, they shall be
explosion-proof and of the type that do not exhaust sooty or oily
residues or any other contaminants into the tank. Only indirect
heat heating units can be used which will not cause the products
of combustion to condense.
11.7 Prior to use, store all coating materials in a secure area '
which shall provide protection from weather and temperature, below
60 degrees F. The area shall be maintained in a safe, neat, and
clean manner and free from fire, explosion or other hazards.
11.8 All work shall be performed in a safe and orderly manner, all
in compliance with the standards as prescribed by OSHA and the
Minnesota Department of Labor and Industry, Division of Accident
Prevention.
12.0 STARTING DATE COMPLETION DATE AND LIQUIDATED DAMAGES
12.1 Commence work on or before August 27, 1990.
All work must be completed by October 1, 1990.
12.2 A notice to proceed will be given to the Contractor once the ,
City receives all the necessary contract and insurance
information. This notice to proceed will be given in writing and
the Contractor shall then give the City a 7 day notice prior to
beginning operations.
12.3 No work shall be done between 6:00 P.M. and 7:00 A.M. nor on
Sundays, or legal holidays without the written approval of the
Owner or Engineer. Refer to GC-32 for details involving daily
working hours, weekend, holiday and night work. '
12.4 Liquidated damages in the amount of $350.00 will be deducted
from any monies due the Contractor for each and every calendar day
that the work remains uncompleted beyond the completion date. 1
12.5 In addition, the inspector's hours, travel and subsistence
shall be paid by the Contractor for all inspection work required
past the regular working hours defined in paragraph 12.3 and past
the completion date. The rates will be $42.00/hour plus $0.30/mile
of travel. The inspection rate for overtime work is $50.00/Hr. The
completion date shall be as defined in paragraph 12.1, plus any
time extensions as determined in paragraph GC-36.
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12.5 Construction Schedule
11 12.5.1 The Contractor shall prepare a bar chart or similar
construction schedule, showing the various phases of work,
duration and completion date(s) he expects to utilize in order to
meet the specified contract completion date(s) . THIS CONSTRUCTION
SCHEDULE MUST BE SUBMITTED FOR REVIEW AND APPROVAL AT THE
PRECONSTRDCTION MEETING.
12.5.2 Work on the project cannot begin without an approved
construction schedule.
13.0 REPAIR WORK
11 13.1 Areas to be repaired are described in Section 1.0.
13.2 All repairs by welding shall be ground smooth or radiused.
These will be welded by a skilled, certified welder under the
direction of the Engineer. The welders shall be certified in
conformance with ASME Section IX and shall submit current copies
of the welders certificates to the Engineer and the Owner. The
repaired areas shall conform to the surface preparation
requirements of Appendix D.
13.3 NO WELDING OVER COATED STEEL SURFACES IS PERMISSIBLE.
I! 13.4 Welding Procedures:
1. All field welding shall be in accordance with ASME Section
VIII, Division 1 and AWWA D-100-84.
2. The location, type, size, and length of all welds shall be
as shown on approved shop drawings. All field welds shall
I! be of the manual shielded metal arc type. Welding shall
not be done when the ambient temperature is lower than 35
degrees Fahrenheit, when surfaces are wet, nor when
welders are exposed to inclement conditions.
I! 3. The Contractor shall submit all shop drawings and welding
procedures to the Engineer for Approval.
13.5 Certification and Tests:
Ii. Contractor shall, upon request from Owner, provide
certification in writing that all welds are in conformance
with this specification and that any weld failure, defect
land/or all damage relating there from will be repaired or
replaced to the satisfaction of Owner at no cost to Owner.
Owner reserves the right to have any and all welds tested.
I! Tests will be paid for by Owner; however, in the event
P that work is defective, Contractor shall pay for the tests
and shall replace all faulty work with work which complies
with this Specification.
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13.6 Any additional repair work, uncovered by the Contractor or
Engineer, during reconditioning shall not be initiated until duly
authorized and executed change orders issued and signed by the
Owner and accepted and signed by the Contractor are completed.
Refer to GC-22 Modifications for details involving increases or
decreases in the amount of work.
14.0 SUPERINTENDENT
14.1 The Contractor shall keep on this job a competent
superintendent or crew foreman who shall be familiar with all
phases of the work. The superintendent or crew foreman shall
represent the Contractor in his absence and all directions given
to him shall be as binding as if given to the Contractor.
15.0 PRECONSTRUCTION MEETING AND INSPECTION OF WORK
15.1 The n ,
E gineer will provide necessary inspection and general
engineering supervision for all work under this contract. A
preconstruction meeting will be held prior to commencing the work,
and all representatives required to attend the meeting will be
notified.
15.2 The items discussed at the preconstruction meeting shall '
include, but not be limited to the following:
1) Construction schedule to be provided by the Contractor.
2) Discuss the role of the inspector during sandblasting and
coating and the cooperation between inspector and the
Contractor. Contractor to provide access and rigging to
all areas to be inspected. ,
3) Surface preparation samples.
4) Inspection of the blasting media and blasting equipment
to prevent the tank shell contamination with moisture and
oil.
5) Tank ventilation and OSHA safety requirements pertaining
to Confined Space Entry.
6) Coating methods for limited access areas.
7) Examination of surface preparation prior to coating.
8) Elapsed time between sandblasting and coating and between
recoating.
9) Standard working hours and no overtime or weekend work
without prior approval.
10) Temperature and humidity monitoring.
11) Clean-up at completion.
12) Inspection reports, progress log and any inspection
"holdpoints."
13) Guarantees and Penalty clauses for late completion.
14) Tank disinfection.
15.3 The Owner's personnel and the inspector shall at all times
have access to the work, and the Contractor shall provide proper
facilities for such access and inspection.
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II15.4 The Engineer reserves the right to inspect the Work at any
time for compliance with all requirements of the specifications.
15.5 The Engineer reserves the right to approve each phase of the
Work before further Work may be done, to halt all Work deemed to
be improper or not in compliance with the Specification, and to
' require the Contractor to promptly correct all improper practices
or deficient Work.
15.6 Inspections may include wet and/or dry film thickness
gauging, visual surface inspection by the naked eye and/or a
suitable magnifying instrument to detect runs, sags, drips, cracks
or other defects in the coating system.
15.7 Inspections may also include any other examination of the
prepared surfaces or coating system, deemed necessary by the
Engineer, including random destructive film thickness and coating
adhesion checks.
15.8 Dry film thickness (D.F.T. ) readings of the coating are taken
to provide reasonable assurance that the specified minimum D.F.T.
! has been achieved. A minimum of five (5) separate spot
measurements shall be made over every 100 square feet in area.
Each spot measurement shall consist of an average of three (3)
gage readings next to each other no further then six (6) inches
apart. Each Spot measurement must be within the specified minimum
' thickness. The single gage readings, however, making up the spot
measurement are permitted to be no less then 80 percent of the
specified minimum thickness.
15.9 The Contractor shall provide all necessary inspection
equipment (at the discretion of the Engineer) , labor, rigging,
lighting and other equipment to facilitate this inspection.
15.10 Any expenses incurred for corrective measures required as
the result of improper practices and/or defective or deficient
' work shall be borne by the Contractor and the extent of these
corrective measures shall be at the discretion of the Engineer.
16.0 USE OP PREMISES
16.1 The Contractor shall confine his apparatus, the storage of
materials and the operations of his workmen to the Owner's
property, and he shall not unreasonably encumber the premises with
' his materials. He shall clean-up abrasive material on public and
private property.
16.2 Use of the Owners property for storage of materials and
' equipment will be as directed by the Engineer. Under no
circumstances will coating materials, thinner or other volatile
materials be stored in or in close proximity to any pump house,
valve pit, sewer outlet, or any other location where accidental
leakage or spills could come into contact with or contaminate the
Owners water or sewage system(s) .
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16.3 Construction power, telephone and security shall be the
responsibility of the Contractor. The use of existing on site
electrical power is not guaranteed. It shall be the Contractors
responsibility to determine the amount and availability of
electrical power at the site and to make arrangements, for the use
and payment of said power with the Owner.
16.4 The Contractor shall furnish, erect and maintain warning
lights and barricades as required by the Engineer to adequately
warn and protect the public from hazardous protrusions, materials,
equipment, etc. , resulting directly or indirectly from the
construction.
16.5 The Contractor shall comply with local and state ordinances
on noise abatement. All equipment shall have effective mufflers
(Critical Use Muffler) on engine exhaust systems and compressors
shall be quiet type models. Night work shall only be permitted
with prior written approval of the Owner.
17.0 STERILIZATION OF TANK ,
17.1 Upon completion of the coating, the inside of the tank shall
be thoroughly cleaned and disinfected by the use of chlorine
applied in a concentrated solution, sprayed over the entire
surface in accordance with the specifications of the Minnesota
Health Department, and AWWA C652-86, section 4.2: Chlorination
Method 2.
17.2 The disinfected surfaces shall remain in contact with the
chlorine solution for at least 30 minutes. Then all disinfected
surfaces, including the inlet and outlet piping and any drain
piping shall be washed and purged with clean water. Remove all
chlorine solution and purging water from the interior. Following
this, potable water shall be admitted.
17.3 The Owner shall take a bacteria test of the water after '
disinfection. If the water is considered not safe after testing,
additional disinfection and testing shall be perform by the
Contractor at his expense until the tank is tested safe for use as
part of a potable water supply system.
18.0 GUARANTEE ,
18.1 The Contractor shall guarantee his work against any defective
materials or workmanship for a period of two (2) years from the
date of acceptance of the project by the City Council. Before
expiration of the two-year guarantee period, the tank shall be
subject to draining and inspection by representatives of the
Owner, Engineer, coating manufacturer, and Contractor. All areas
indicating evidence of failure shall be properly repaired at no
additional cost to Owner.
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19.0 PAYMENT
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11 19.1 Payment estimates shall be prepared and submitted to the
Engineer, by the Contractor on the first of the month for work
completed during the previous month. The Contractor shall be paid
I! for 95 percent of the work completed during this period.
19.2 When the contract is completed and the work accepted by the
' City Council, the final payment shall be made to the Contractor.
See Section GC-48 of the General Conditions for further
information.
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