HomeMy WebLinkAboutPW13-103 - Change Order - #26 - Goodfellow Bros., Inc. - SE 256th St Improvements - 10/27/2014 i
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KENT Document
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CONTRACT COVER SHEET
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This is to be completed by the Contract Manager prior to submission
to City Clerks Office. All portions are to be completed.
If you have questions, please contact City Clerk's Office.
Vendor Name: Goodfellow Brothers, Inc.
Vendor Number: 506122
JD Edwards Number
Contract Number: 13-103
This is assigned by City Clerk's Office
Project Name: SE 256th Street Improvements
Description: ❑ Interlocal Agreement ® Change Order ❑ Amendment ❑ Contract
❑ Other:
Contract Effective Date: 6J6J2013 Termination Date:
Contract Renewal Notice (Days):
Number of days required notice for termination or renewal or amendment
Contract Manager: Phil McConnell Department: PW Engineering
Contract Amount:
Approval Authority: (CIRCLE ONE) Department Director Mayor City Council
Detail: (i.e. address, location, parcel number, tax id, etc.):
Change Order 26
As of: 08/27/14
CHANGE ORDER NO. #26
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NAME OF CONTRACTOR: Goodfellow Brothers, Inc. ("Contractor")
CONTRACT NAME & PROJECT NUMBER: SE 256th Street Improvements
ORIGINAL CONTRACT DATE: June 6 2013
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This Change Order amends the above-referenced contract; all other provisions of the
contract that are not inconsistent with this Change Order shall remain in effect. For valuable
consideration and by mutual consent of the parties, the project contract is modified as follows:
1. Section I of the Agreement, entitled "Description of Work," is hereby modified to
add additional work or revise existing work as follows:
In addition to work required under the original Agreement and any
prior Amendments, Contractor shall provide all labor, materials, and
equipment necessary to:
Spectra shield lining of three existing sewer manholes due to existing
pipe material connection concerns, ground water concerns and cost
savings.
2. The contract amount and time for performance provisions of Section II "Time of
Completion," and Section III, "Compensation," are hereby modified as follows:
Original Contract Sum, $5,208,988.60
(including applicable alternates and
WSST)
Net Change by Previous Change Orders $87,921.87
(incl. applicable WSST)
Current Contract Amount $5,296,910.47
(incl. Previous Change Orders)
Current Change Order $32,972.80
Applicable WSST Tax on this Change $3,132.42
Order
Revised Contract Sum $5,333,015.69 I
CHANGE ORDER - 1 OF 3
Original Time for Completion 300 working days
(insert date)
Revised Time for Completion under 304 working days
prior Change Orders
(insert date) j
Days Required (f) for this Change 0 calendar days
Order
Revised Time for Completion 304 working days
(insert date)
In accordance with Sections 1-04.4 and 1-04.5 of the Kent and WSDOT Standard
Specifications, and Section VII of the Agreement, the Contractor accepts all requirements of this
Change Order by signing below. Also, pursuant to the above-referenced contract, Contractor
agrees to waive any protest it may have regarding this Change Order and acknowledges and
accepts that this Change Order constitutes final settlement of all claims of any kind or nature
arising from or connected with any work either covered or affected by this Change Order,
including, without limitation, claims related to contract time, contract acceleration, onsite or
home office overhead, or lost profits. This Change Order, unless otherwise provided, does not
relieve the Contractor from strict compliance with the guarantee and warranty provisions of the
original contract, particularly those pertaining to substantial completion date.
All acts consistent with the authority of the Agreement, previous Change Orders (if any),
and this Change Order, prior to the effective date of this Change Order, are hereby ratified and
affirmed, and the terms of the Agreement, previous Change Orders (if any), and this Change
Order shall be deemed to have applied.
The parties whose names appear below swear under penalty of perjury that they are
authorized to enter into this contract modification, which is binding on the parties of this
contract.
3. The Contractor will adjust the amount of its performance bond (if any) for this
project to be consistent with the revised contract sum shown in section 2, above.
IN WITNESS, the parties below have executed this Agreement, which will
become effective on the last date written below.
,t.,
CONTRACTOR: PITY-OF KENT:
By: - BY
(signature) 61 ignature)
Print Name: 111A4 Onelc--1 Print Name: Timothy ) LaPorte, P.E.
Its 9 mac±f tiT Its Public Works Director
(title) (title)
DATE; lulz�/fy DATE: A0 2 /
CHANGE ORDER - 2 OF 3
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® FILE NO: 200.2
6<ENT
w.n.,.a. . CHANGE ORDER WORKSHEET NO. 26
Construction Management Division - Public Works
Project: SE 256th Street Improvements Project No.: 09-3012C
Project Engineer: Mark Madfai Fed-Aid No.: N/A
Owners Rep: Phil McConnell Contractor: Goodfellow Brothers
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Date: 9/25/2014
I. PROPOSED CHANGE
Spectra Shield lining of three existing sewer manholes
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II. REASON AND BACKGROUND FOR CHANGE
Existin ipe materials connection concerns, ground water concerns, Cost Savings
III. METHOD OF PAYMENT
NEW PAY ITEMS) ❑ Not Applicable
Change Order No. i I I FOR ACCOUNTING USE ONLY
Sch. No. Item Description Total Est. Qty this Unit- Unit Price Total Estimated Cost of
Qty PE Item
9 { Lining 3 existing sewer i 1 1 LS $32,972.80 $32,972.80
manholes
t
_ I REQUIRED
Attached I — a CREATE
—later date upon completion aof workyment
b�made L® ' PAY THIS PAY ESTIMATE
_ L _ -_..
Material Submittals Required - CC Construction Coordinator New Sub Reqrd? F No
DELETE EXISTING PAY ITEM(S) per 1-09.5 ® Not Applicable
Change Order No. I I - I i I I FOR ACCOUNTING USE ONLY
Sch No. B.I.No. j Item Description Qty l Unit I Unit Price ( Cost of Item
.�.-- — ____-...-
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Independent Estimate Attached -REQUIRED j
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INCREASE/DECREASE TO EXISTING PAY ITEM(S) ® Not Applicable
Change Order No. I FOR ACCOUNTING USE ONLY
Sch. No j B.I. No. -, -Item Description Qty Unit Unit Price Cost of Item
. .---- -______
- I
_ ,..- -- -------
independent - -.- .__ .....__ ....... —.
Estimate Attached - REQUIRED j Q j
1 REV. DATE:4/01/10
FILE NO: 200.2
TOTAL ESTIMATED COST OF CHANGE ORDER $32,972780
*Total of the cost of item columns
THIS PAY ESTIMATE $32,972.80
IV. WORKING DAYS
Original Contract 3QQ Due This Change Order* 0 1 Previous Total 1 304
..._DATE. DATE -...
, a r�twn ---
I -7atin iuitih�ai
TOTAL WORKING DAYS* 304
*This Change Order + Previous Total
All work, materials and measurements to be in accordance with the Standard Specifications
and Contract Special Provisions for the type of work described.
Prepared By: Date:
I ?'M McConnell
Construction Supervisor: Date:
Paul,',K�hn6
Construction Manager: Date: ��4141
Eric Connor
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2 REV. DATE: 4/01/10
McConnell, Phillip
From: McConnell, Phillip
Sent: Wednesday,June 25, 2014 3:25 PM
To: ryanp@goodfellowbros.com
Cc: adrianm@goodfellowbros.com; Reed, Greg; Kuehne, Paul; Madfai, Mark; Freih, Todd
Subject: Manhole Lining Pricing Acceptance
Attachments: 2659 L Manhole Linings packet.pdf
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Ryan,
You may proceed with the sewer manhole sealing and lining. Are you scheduling the special inspection of this
process? If not we need to coordinate these two bodies of work
Phil McConnell, Owners Representative
Construction Management I Public Works Department
220 Fourth Avenue South, Kent, WA 98032
Phone 253-856-5542 1 Cell 253-261-5685
pmcconnell(a)KentWA.gov
CITY OF KENT, WASHINGTON
KentWA.gov Facebool< YouTube
t l,am?S;;k C(:M'JSeDVP III., ptIl 9`FfilCd `�'ia:C� E MAIL.
From: Ryan Phelan [mailto-,ryanpg oodfellowbros com]
Sent: Wednesday, June 25, 2014 9:16 AM
To: McConnell, Phillip
Cc: Adrian Marlow
Subject: Manhole Lining Pricing Request
Phil,
Please see the attached. Please confirm if we are approved to proceed. Let me or Adrian know if there are any
questions.
Thanks,
Ryan Phelan im,
maple Valley- Washbt(ton
P.O. Box 1419,22035 SE Wax Rd M4
Maple valley,Washington 98038
P (425)432-2202 I C(206)794-9714 I F(425)432-1555
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CONFIDENTIALITY NOTICE:If you have received this communication in error,please notify us immediately.This message Is intended a pli for the use of the
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McConnell, Phillip
From:
realminc@aol.com
Sent: Tuesday, December 24, 2013 9:13 AM
To: McConnell, Phillip
Subject: Re: City Of Kent - Questions
Attachments: DIVISION 7 & Large Pipes.docx
Phil,
Thank you for meeting with me yesterday morning to look at the manholes. I will send over Marc Ficca's contact
information separately.
To remove the existing coating on 2 manholes, remove existing steps as necessary on 2 manholes, reinstall new steps as
necessary, perform chemical injection to stop ground water infiltration, all prep work, installation of the 500
mil. SpectraShield Liner System from the ring and cover through the channel on the 3 manholes that we looked at in the
field (I apologize for not getting the asset#s when we were onsite to include with this quote). 10 year warranty, as well
as bypassing through the channel, no traffic control, work to be performed in 1 mobilization and consecutive days. Realm
would need approximately 5 consecutive work days to perform this work. Price excludes permits and hydrant fees. Realm
would need access to a fire hydrant within 200 ft. of each location. Prevailing wages, intents and affidavits fees
included. Cost for third party testing not included.
I attached our SpectraShield specification. Please let me know if you have any questions or need any more information.
PRICE $29,440.00
Dave Follett
President
REALM INC.
PO Box 580
DuPont, WA 98327
Phone (360) 456-7627
Fax (866) 458-5110
realminc@aol com
---Original Message-----
From: McConnell, Phillip <PMcConnell(a)kentwa.gov>
To: 'realminc@aol.com' <realminc(a)aol.com>
Sent: Fri, Dec 13, 2013 2:23 pm
Subject: City Of Kent-Questions
A called a couple of weeks ago and got a bid on lining 3 sewer manholes. I was hoping a representative could come look
at the 3 manholes and make sure they are candidates for your lining system. I also called and left a message today.
Thank You
Phil McConnell, Owners Representative
Construction Management I Public Works Department
220 Fourth Avenue South, Kent, WA 98032
Phone 253-856-5542 1 Cell 253-261-5685
pmcconnellffiKentWA gov_
CITY OF KENT,WASHINGTON
KentWA.gov Facebook You'rube
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DIVISION 7
DRAINAGE STRUCTURES, STORM SEWERS, SANITARY SEWERS,
WATER MAINS, CONDUITS AND LARGE DIAMETER PIPE
Add the following new section:
7-06.1 Description
The work described within details a complete program for use on new or existing brick, steel or
concrete sewer and drainage structures including but not limited to manholes, wetwells, pump
stations, grit chambers, digesters rehabilitation and large diameter pipe. This section details the
methods, procedures, materials, and equipment as required to produce A Total Multi-Layered
Liner System for Structures" to produce structures rehabilitated from hydrogen sulfide based
corrosion damage. The completed system will provide a corrosion-resistant liner that restores
walls to original surface levels and eliminates water infiltration and exfiltration.
7-06.1(1) References
This section references American Society of Testing and Materials (ASTM) standard specifications
which are made a part hereof by such reference and shall be the latest edition and revision
thereof.
ASTM 4541 Adhesion
ASTM D 412 Tensile Strength (PSI)
ASTM D 412 Elongation (%)
ASTM D 2240 Tear Strength (PLI)
ASTM D 1737 Hardness
ASTM D 1737 Flexibility (1/8" mandrel)
ASTM 4060 Taber Abrasion (mg loss)
CIGMAT Evaluation (UH 96-7) of Spectrashield Liner System for Wastewater Concrete and Clay
Brick Facilities. University of Houston Department of Civil Engineering: December 1996.
SSPC SP-13 Nace No. 6—Surface Preparation of Concrete
NACE—The published standards of National Association of Corrosion Engineers (NACE
International), Houston TX SSPC—The published standards of the Society of Protective Coatings
7-06.1(2) Contractor and Manufacturer Qualifications
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The Manufacturer of the Coating System shall have a minimum of three million (3,000,000.)
square feet of coatings successfully installed in accordance with these specifications.
Manufacturer's using standards other than those listed in these specifications shall demonstrate
to the satisfaction of the Owner that the standards followed produce a product that is, at a
minimum, equal to the quality of the product developed using the listed standards contained
within this specification.
The Coating System Contractor shall have successfully completed projects totaling a minimum of
15,000 square feet in the last 5 years using the specified coating system. In addition, the
Contractor's project superintendent shall have been continuously employed by the Contractor for
a minimum of five (5) years and have a minimum of five (5) successfully completed projects
totaling a minimum of 8,000 square feet using the specified coating system. The Contractor's
project superintendent shall be on the project for the duration of the project and shall be available
at all times during the specified coating system application. The applicator on the Contractor's
installation crew shall have been continuously employed by the Contractor for a minimum of five
years (5) and have five (5) years of the specified coating system application experience and shall
be on the project site at all times. The applicator will be a separate person than the
superintendent.
7-06.1(3) Submittals
All materials and procedures required to establish compliance with the specifications shall be
submitted to the Owner for review/approval. Submittals shall include at least the following:
1 Technical Data Sheet on each product used
2 Materials Safety Data Sheet (MSDS) for each product used
3 ASTM References
4 CIGMAT Evaluation
5 Descriptive literature, bulletins, and/or catalogs of materials
6 Work procedures including flow diversion plan, method of repair, etc.
7 Material and method for repair of voids and concrete spalling in structures
8 Material and method of repair of leaks or cracks in structures
9 Contractor and Manufacturer Qualifications per 7-06.1(2) & 7-06.1(5)
10 Provide letter from manufacturer of proposed installation
Manufacturer is in agreement with the intended application
Applicator is qualified to do the Work and meets the quality assurance minimum
experience requirements.
11 Final installation report on completed structures
12 Sample warranty signifying the applicator and parent company provide warranty
repairs
13 Traffic control plan
14 Flow bypass plan
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7-06.1(4) Warranty
Protection coating system shall provide a minimum of a 10-year manufacturer's and applicator
warrantee against coating failure.
CCI Spectrum, Inc. (manufacturer) and Applicator warrant the SPECTRASHIELD Liner System
against failure for a period of 10 years. "Failure" will be deemed to have occurred if the protective
lining fails to (a) prevent the internal deterioration or corrosion of the structure (b) protect the
substrate and environment from contamination by effluent or (c) prevent groundwater infiltration.
If any such failure occurs within 10 years of initial completion of work on a structure,the damage
will be repaired to restore the lining at no cost to the Owner within 60 days after written
notification of the failure. "Failure" does not include damage resulting from mechanical or
chemical abuse or act of God. Mechanical or chemical abuse means exposing the lined surfaces of
the structure to any mechanical force or chemical substance not customarily present or used in
connection with structures of the type involved. There are no warranties express or implied other
than those specifically stated in this section. Any liability for consequential and incidental
damages is expressly disclaimed. Liability is limited to and shall not exceed the purchase price
paid.
7-06.1(5) Quality Assurance
Furnish materials of quality required by the American Society for Testing and Materials (ASTM) or
other approved standards and specifications. Contractor shall initiate and enforce quality control
procedures consistent with the coating product(s) manufacturer recommendations and applicable
MACE or SSPC standards as referenced herein.
The manufacturer and applicator of the total liner system of wastewater structures shall be a
company that specializes in the design, manufacturer, or installation of corrosion protection
systems for wastewater structures. Applicator shall be completely trained in leak repair, surface
preparation, and corrosion materials application on wastewater structures. Corrosion
materials/products shall be suitable for installation in a severe hydrogen sulfide environment
without any deterioration to the liner.
The applicator shall be trained and certified by the manufacturer for the handling, mixing,
application and inspection of the liner system as described herein. Contractor shall submit
certificates and qualifications to indicate that they are certified by and trained by the coating
product manufacturer to apply the liner products as identified in Section 7-06.2(1).
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To ensure total unit responsibility, all materials and installation thereof shall be furnished and
coordinated with/by one supplier/applicator who turnkeys the work and assumes full
responsibility for the entire operation.
7-06.2 Materials
7-06.2(1) Materials and Equipment
The coating system shall provide a dynamically applied three part corrosion resistant coating
system that restores vertical or conical wall profiles to their original surface shape and dimensions
and eliminates moisture travel through the concrete, brick, steel and grout substrates. The
coating system shall remain integral to and joint free at transition points such as manhole floors,
concrete flow troths and frames and covers. The materials to be utilized in the lining of structures
shall be designed and manufactured to withstand the severe effects of hydrogen sulfide in a
wastewater environment. Manufacturer of corrosion protection products shall have long proven
experience in the production of the lining products utilized and shall have satisfactory installation
record.
An approved equal will be an elastomeric coating system with a 10 year warranty from
Manufacturer and Installer and have the same characteristics as the specified coating system and
a minimum thickness of 500 mils (180 mils for the large diameter pipe) and meet all of the
requirements contained herein, including a proven track record of more than 3 million square feet
installed. The Contractor shall pay for all costs associated with engineering review of items or
systems requested for substitution. Costs will be based on the Engineer's normal billing rates with
costs deducted from monthly progress payments for direct payment to the Engineer.
Spray equipment shall be specifically designed to accurately ratio and apply the coating system.
The spray equipment shall be specifically dedicated to spray this coating system only.
Equipment for installation of lining materials shall be high quality grade and be as recommended
by the manufacturer.
The lining system materials to be utilized for the structure rehabilitation shall be as described
below:
1. Liner Utilizing Surfacer:
Installation Liner
Moisture Barrier Modified Polymer
Surfacer Polyurethane/Polymeric Blend Foam
Final Corrosion Barrier Modified Polymer
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2. Large Diameter Pipe: j
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Installation Liner
Primer Penetrating Primer
Moisture Barrier Modified Polymer
Final Corrosion Barrier Modified Polymer
3. Modified polymer shall be sprayable, solvent free, two-component, polymeric, moisture
/chemical barrier specifically developed for the corrosive wastewater environment.
TYPICAL CHEMICAL ANALYSIS
"A" Component
Viscosity, 770 F, cps., ASTM D1638 450
Physical State Liquid
Color Clear to amber
Hygroscopicity Reacts with water
"B" Component
Viscosity, 77' F, cps., ASTM D1638 550
Physical State Liquid
Color Flamingo Pink
Nonvolatile 100%
Reaction Profile (100 grams, 175E
Sample
Gel Time, seconds 10
Tack Free Time, seconds 20
Cure Time, seconds 90
Processing
A System/B System, volume ration 1.00/1.00
Typical Physical Properties
Tensile Strength, PSI >3,600
Elongation, % >300
Tear Strength, PLI >500
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Shore A Hardness 96
100% Modulus, PSI >2,400
4. Polyurethane Rigid Structure Foam, low viscosity two-component, containing flame
retardants.
TYPICAL CHEMICAL ANALYSIS
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"A" Component
Viscosity, 77' F, cps., ASTM D1638 200
Physical State Liquid
Color Dark brown
Hygroscopicity Reacts with water and evolves CO2 gas
"B" Component
Viscosity, 77' F, cps., ASTM D1638 660
Physical State Liquid
Color Transparent dark
Hygroscopicity Absorbs water rapidly thus changing
Ratio
Reaction Profile (100 grams, 77 F sample)
Cream time, seconds 1-4
Tack Free Time, seconds 5-8
Rise Time, seconds 6-10
Processing
A SystemjB System, volume ration 1.00/1.00
Typical Physical Properties
Density, nominal, core, Ibs/ft ASTM D1622
@ 74° F 4-10
Compression Strength, ASTM D1621 @ 74* F
Parallel rise, PSI 90-150
Closed Cell Content, %-ASTM 1940 @ 74' F Over 95
Sheer Strength, PSI —ASTM C273 @ 74° F 225-250
Total thickness of multi-component stress panel liner shall be a minimum of 500 mils. (Large
Diameter Pipe is 180 mils). Product shall be SPECTRASHIELD, by CC[ Spectrum, Inc.
Materials are to be kept dry, protected from weather and stored under cover. Protective coating
materials are to be stored between 50' deg F and 90' deg F. Do not store near flame, heat or
strong oxidants. Protective coating materials are to be handled according to their material safety
data sheets.
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7-06.3 Construction Requirements
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7-06.3(1) Temporary Sewer Flow Bypass
The Contractor shall be responsible for supplying, installing, operating, monitoring, and
maintaining a bypass system.
Contractor shall provide a plan showing the bypass locations and destinations for his proposed
method of construction. If during construction the Owner's Representative believes that the
bypass system is not adequately sized and a potential for an overflow exists, the Owner's
Representative will instruct the Contractor to immediately open the channel to receive flows.
All cost for interrupting the in-progress bypass work shall be paid by the Contractor.
7-06.3(2) Examination
A Pre-Construction meeting shall take place prior to Contractor mobilization. All parties to have
physical presence on the project during construction shall be present. At this meeting
responsibilities and authorities during construction shall be discerned; any comments and
questions regarding materials and execution of these specifications shall be presented and
addressed.
Appropriate actions shall be taken by Contractor to comply with local, state, and federal
regulatory and other applicable agencies with regard to environment, health, and safety during
work.
All structures to be coated shall be readily accessible and within 150 ft. to the Contractor.
Any active flows shall be dammed, plugged, or diverted as required to ensure all liquids are
maintained below or away from the surfaces to be coated.
Prior to commencing surface preparation, Contractor shall inspect all surfaces specified to receive
the coating and notify Owner, in writing, of any noticeable disparity in the site, structure or
surfaces which may interfere with the work, use of materials or procedures as specified herein.
The use of acid for cleaning purposes, no matter how diluted, will not be allowed.
Prior to entering structures, an evaluation of the atmosphere will be conducted to determine the
presence of toxic, flammable vapors or possible lack of oxygen. The evaluation shall be in
accordance with local, state or federal safety regulations. A positive flow ventilation system shall
be installed to ventilate the manhole during construction.
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7-06.3(3) Surface Preparation
Oils, grease, incompatible existing coatings, waxes, form release, curing compounds,
efflorescence, sealers, salts, or other contaminants which may affect the performance and
adhesion of the coating to the substrate shall be removed.
Surface preparation methods shall produce a cleaned, abraded and sound surface with no
evidence of laitance, loose concrete, brick or mortar contaminants or debris, and shall display a
surface profile suitable for application of the coating system.
Concrete and/or mortar damaged by corrosion, chemical attack or other means of degradation
shall be removed so that sound substrate remains.
Choice of surface preparation method(s) should be based upon the condition of the structure and
concrete or masonry surface, potential contaminants present, access to perform work, and
required cleanliness and profile of the prepared surface to receive the coating product(s).
Surface preparation method, or combination of methods, that may be used include high pressure
water cleaning, waterjetting, abrasive blasting, shotblasting, grinding, scarifying, detergent water
cleaning, hot water blasting and others as referenced in NACE No. 6/SSPC SP-13. Whichever
method(s) are used,they shall be performed in a manner that provides a uniform, sound clean
neutralized surface suitable for the specified coating product(s). Contractor shall prevent and
remove, where necessary, large debris from the structure so as to prevent sewer clogging.
After completion of the surface preparation, review the following check list, which is the
inspection for the following:
• Leaks
• Cracks
• Holes
• Exposed Rebar
• Ring and Cover Condition
• Invert Condition
• Inlet and Outlet Pipe Condition
After all defects in the structure are identified, all active leaks shall be completely sealed using a
Hydrophobic and/or Hydrophilic Urethane Grout designed to stop infiltration of ground water by
pressure injection as supplied by Avanti International Chemical Grouts. Repairs to exposed rebar,
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defective pipe penetrations or inverts etc. shall be completed utilizing quick setting Hydraulic
Cement as manufactured by Euclid Chemical.
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7-06.3(4) Application
Temperature of the surface to be coated should be maintained between 500 and 1200 degrees F.
Specified surfaces should be shielded to avoid exposure of direct sunlight or other intense heat
source. Where varying surface temperatures do exist, coating installation should be scheduled
when the temperature is falling versus rising.
late personal protection equipment shall be utilized but in every case when applying the
Appropriate p p q
liner,the sprayer and personnel in direct contact with the spray atmosphere, will always be
protected by supplied air.
Coat all interior surfaces with the approved coating system in strict accordance with the
manufacture's recommendations. Coating shall be field applied. Coating system shall be
continuous from the manhole invert and extend upward and onto the manhole ring. Exterior
surfaces are not to be coated. For large diameter pipes the coating will be continuous and extend
into the structure, and have a minimum coverage of 6" circumference around the pipe
penetration. If any attachments are scheduled for installation or are existing in a structure, the
fasteners shall be Installedfembedded into the concrete structure prior to the coating system
application to ensure a uniform seal around the protruding fasteners. When installing new
channels—the channel invert will need to be spring line minus Y". Final installation for the 3-coat
system shall be a minimum of 500 mils (180 mils for large diameter pipe) . A permanent
identification and date of work performed shall be affixed to the structure in a readily visible
location within the structure.
Application of the spray applied material must be completed in one (1) mobilization in order to
minimize the disruption and cost of excessive bypassing, pipeline plugging, traffic control and all
other support services.
The structure should be allowed to cure for 24 hours and return to ambient temperature prior to
any physical testing, including vacuum testing.
The finished structure must be returned to full service immediately after the spray application is
complete.
The applicator shall provide a final written report to Engineer detailing the structure location,
structure number or unique identifier (provided to the contractor by the Engineer), date or report,
date of installation, and description of installation.
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7-06.3(5) Testing
Contractor shall notify the Engineer and/or Inspector upon completion of manhole surface
preparation work. Engineer and/or Inspector may conduct visual inspections of surface
preparation work and request additional preparation work be provided to properly allow adhesion
of repair and coating products if necessary.
1. Perform a thickness measurement of the intermediate spray foam surfacer coat. (This is
not applicable to large diameter pipe coatings)
a. Using a pointed sliding scale probe/ penetrate into the intermediate surfacer foam
and measure the thickness which shall be a minimum of% inch. Perform 3 tests at
each large structure and 25% of manholes.This is a destructive test as it leaves a
small hole through the surfacer therefore mark each measurement location with a
felt tip pen so that when the corrosion barrier coat is applied the applicator can be
sure to apply a double coat for added protection. If a black felt tipped pen is used
there should be no visible mark showing through after application of the final coat.
To verify that all surfaces are coated sufficiently and no holidays or pinholes exist through to the
substrate perform a high voltage test in accordance with ASTM D4787 (Standard Practice for
Continuity Verification of Liquid or Sheet Lining Applied to Concrete Substrates).
b. This test shall be performed after the application of the intermediate thick surfacer
coat and before the final corrosion protection coat. Perform 3 tests at each large
structure and 25%of manholes.
c. This test shall not be performed until at least 30 minutes have elapsed after
application of the surfacer coat so as to develop sufficient physical properties in the
coating to withstand the high voltage arc.
d. The high voltage setting shall be sufficient to arc through a distance of one-half inch
(Y2") to ground.
e. Circle all indications with a felt tip pen, preferably black.
f. A double application of the final corrosion protection coat will be made so as to
completely cover the indicted holiday and no visible black mark showing through
the final coat.
Quality Control Personal will conduct the coating testing and will be trained in the use of testing or
inspection instrumentation and knowledgeable of the proper use, preparation and installation of
the coating product(s)to be used as specified herein
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Visual inspection may be made by the Engineer and/or Inspector.
7-06.4 Measurement
Structure rehabilitation will be measured per each.
7-06.5 Payment
Payment will be made in accordance with the General Conditions, for each of the following bid
items that are included in the Proposal.
"Structure Rehabilitation", per lump sum.
" including providing structure internal
All costs associated with Structure Rehabilitation , includ g p g
surface preparation and furnishing and installing structural liner system components for structure
and maintaining sewer flow bypass as required during rehabilitation work activities, shall be
included in the unit contract price for "Structure Rehabilitation", per lump sum.
END OF SECTION 7-06
END OF DIVISION 7
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Sewer manhole replacements at ST 33+0 and 38+50 will be deleted from the contractor and replaced
with manhole relining. The product will be Spectra shield, a three coat process. There will be an outside
special inspector during the coating process. The work will consist of sealing all leaks, replacing steps as
necessary, prepping the structure for coating, and the coating process. All work is covered by a 10 year
warranty.
The anticipated cost savings will be in the area of$20,000. With a large variable being the force account
to attempt to get an O.D. on the existing run south from SSMH FF79.