B.08.03 Amendment 0006 W912EF22R0015 McNary DUE System Rehab.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

The purpose of this amendment is to incorporate changes outlined below .

1. CONTRACT ID CODE PAGE OF PAGES

1 2

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 13-Oct-2022

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912EF22R0015

X 9B. DATED (SEE ITEM 11)

18-Aug-2022

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

13-Oct-2022

CODE

USAED, WALLA WALLA - CONTRACTING DIV.

HILLARY A. MORGAN

201 N. THIRD AVENUE

WALLA WALLA WA 99362

W912EF 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EF22R0015

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

Summary of changes for Amend - 0006 McNary Powerhouse Drainage, Unwatering, and Equalization System Rehabilitation

W912EF22R0015

1. Revised the following Specifications (See revised specification for details):

a. SECTION 22 11 00.01 28 PIPING AND VALVES

• Revised Paragraph 3.2.2.1 "Water Piping Test Plan".

b. SECTION 33 01 30.16 28 DRAINAGE HEADER DEBRIS REMOVAL

• Added Paragraph 2.1.1 "Drainage Header Debris".

(End of Summary of Changes)

MNA Powerhouse Drainage_Unwatering_Equalization System Rehab W912EF22R0015 Amend-0006

SECTION TABLE OF CONTENTS

DIVISION 22 - PLUMBING

SECTION 22 11 00.01 28

PIPING AND VALVES

PART 1 GENERAL

1.1 SCOPE

1.2 REFERENCES

1.3 SUBMITTALS

1.4 QUALITY ASSURANCE

1.5 PIPING DRAWINGS

PART 2 PRODUCTS

2.1 WATER PIPING

2.1.1 Galvanized Steel Piping

2.1.2 Stainless Steel Piping

2.2 VALVES

2.2.1 Resilient Seat Wedge Gate Isolation Valves

2.2.2 Equalizer Valves

2.2.2.1 Equalizer Valve Packing

2.2.3 Silent Check Valves

2.2.4 Double Wafer Check Valve

2.2.5 Unwatering Discharge Plug

2.2.6 Ball Valves

2.3 MISCELLANEOUS PIPING MATERIALS

2.3.1 Flanges and Gaskets

2.3.2 Mechanical Couplings

2.3.3 Threaded Fittings

2.3.4 Expansion Joints

2.3.5 Flanged Coupling Adapter

2.3.6 Welded Outlets

2.3.7 Pressure Gauges

2.3.8 Offset Pipe Clamps

2.3.9 Draft Tube Drain Tee

2.3.10 Custom Suction Bell

2.3.11 Drainage Header Clean Out

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Pipe Plug Installation

3.1.2 Piping Joints

3.1.2.1 Threaded

3.1.2.2 Unions and Flanges

3.2 FIELD QUALITY CONTROL

3.2.1 Inspections

3.2.2 Field Testing

3.2.2.1 Water Piping Test Plan

3.3 WELD TESTING

3.4 IDENTIFICATION SYSTEMS

3.4.1 Identification Tags

3.4.2 Pipe Labels

SECTION 22 11 00.01 28

G4EDHCMP

Line

ATTACHMENTS:

McNary Piping Color Marker Identification and Label Scheme

-- End of Section Table of Contents --

SECTION 22 11 00.01 28

SECTION 22 11 00.01 28

PIPING AND VALVES

PART 1 GENERAL

1.1 SCOPE

This section specifies the materials and workmanship standards applicable to the fabrication, assembly, installation, and testing of the various items of piping work. These requirements are in addition to those contained in other sections or indicated on the drawings.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1/D1.1M (2020; Errata 1 2021) Structural Welding Code - Steel

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B1.20.1 (2013; R 2018) Pipe Threads, General Purpose (Inch)

ASME B16.3 (2016) Malleable Iron Threaded Fittings, Classes 150 and 300

ASME B16.42 (2016) Ductile Iron Pipe Flanges and Flanged Fittings, Classes 150 and 300

ASME B16.5 (2020) Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard

ASME B16.21 (2016) Nonmetallic Flat Gaskets for Pipe Flanges

ASME B16.34 (2017) Valves - Flanged, Threaded and Welding End

ASME B31.3 (2016) Process Piping

ASME B31.9 (2017) Building Services Piping

ASME B40.100 (2013) Pressure Gauges and Gauge Attachments

ASTM INTERNATIONAL (ASTM)

ASTM A 53 (1997) Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless

ASTM A 105/A 105M (2005) Carbon Steel Forgings for Piping Applications

ASTM A 516/A 516M (2004) Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service

ASTM A536 (1984; R 2014) Standard Specification for Ductile Iron Castings

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A320/A320M (2015) Standard Specification for Alloy/Steel and Stainless Steel Bolting Materials for Low-Temperature Service

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME A13.1 (2020) Scheme for the Identification of Piping Systems

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C110/A21.10 (2012) Ductile-Iron and Gray-Iron Fittings for Water

AWWA C116/A21.16 (2015) Protective Fusion-Bonded Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray Iron Fittings

AWWA C213 (2015) Fusion-Bonded Epoxy Coating for the Interior and Exterior of Steel Water Pipelines

AWWA C515 (2009) Reduced-Wall, Resilient-Seated Gate Valves for Water Supply Service

AWWA C606 (2015) Grooved and Shouldered Joints

ASTM INTERNATIONAL (ASTM)

ASTM A312/A312M (2019) Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

INTERNATIONAL CODE COUNCIL (ICC)

ICC Plumbing Code (2012) International Plumbing Code

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-25 (1998) Standard Marking System for Valves, Fittings, Flanges and Unions

MSS SP-110 (2010) Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and

Flared Ends

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals having an "I" designation are for information only. When used, a designation following the "G" or "I" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Identification Tags ; G, C

Valve Operator Color Schedule ; G, ME

SD-02 Shop Drawings

Piping Drawings ; G, ME

SD-03 Product Data

Resilient Seat Wedge Gate Isolation Valves ; G, ME

Silent Check Valves ; G, ME

Double Wafer Check Valve ; G, ME

Unwatering Discharge Plug ; G, ME

Ball Valves ; I, ME

Equalizer Valve Packing ; I, ME

Spare Equalizer Valves ; I, ME

Miscellaneous Piping Materials ; I, ME

SD-06 Test Reports

Water Piping Test Plan ; G, ME

Discharge Piping Weld Test ; I, ME

1.4 QUALITY ASSURANCE

Plumbing systems including fixtures, equipment, materials, installation, and workmanship shall be in accordance with the ICC Plumbing Code (referred to herein as Plumbing Code) except as modified herein. In the Plumbing Code the advisory provisions shall be considered to be mandatory, as though the word "shall" had been substituted for the word "should" wherever it appears; reference to the "authority having jurisdiction," the Administrative Authority, the Plumbing Official, and the Design Engineer shall be interpreted to mean the Contracting Officer.

1.5 PIPING DRAWINGS

The Contractor shall submit Piping Drawings for the pump discharge and inlet pipes, pump columns as well as all replaced drainage piping.

Drawings shall consist of plans drawn to scale, with elevations, sections and details to show clearly the location (by dimension to pertinent building features) of all piping. This includes but is not limited to, details of connections and size and type of piping and valves, all support types and locations, pipe thrust restraints, sway braces, and appurtenances.

PART 2 PRODUCTS

2.1 WATER PIPING

2.1.1 Galvanized Steel Piping

Steel pipe, unless otherwise specified, shall be galvanized steel pipe conforming to ASTM A 53 , Type S, Grade B, seamless pipe. For all nominal pipe sizes flanged connection and fittings shall be used according to ASME B16.5 and ASME B16.42 class 150 as applicable, unless noted otherwise. For nominal pipe sizes less than 4 inches in diameter that cannot be flanged due to existing conditions threaded connections and fittings shall be used according to ASME B16.3 class 150, unless noted otherwise. Fabricated piping shall be "hot-dip" galvanized in accordance with ASTM A123/A123M after all welding is complete. All welding and repairs to galvanizing shall be done according to 05 50 14.00 28

STRUCTURAL METAL FABRICATIONS.

2.1.2 Stainless Steel Piping

Stainless steel pipe shall meet the requirements of ASTM A312/A312M , seamless, Grade TP304, TP304L, TP316, or TP316L, Schedule 10S with dimensions conforming to ASME B31.9 .

2.2 VALVES

Generally, valves shall conform to ASME B16.34 as applicable or unless specified otherwise. Valves of nominal sizes equal to or greater than 4 inches in diameter shall have flanged end connections conforming to ASME B16.42 class 150. Valves of nominal sizes less than 4 inches in diameter shall have threaded end connections according to ASME B16.3 class 150 with a union on all but one side of the valve, or solder end connections for connections between bronze valves and copper tubing. All new valves shall be provided with means to lock them in both the open and closed positions. Contractor shall verify the existing dimension of all valves over 6 inches in diameter to confirm new replacement valves will fit within the existing space per SECTION 01 11 01.00 28 SUPPLEMENTARY REQUIREMENTS, paragraph FIELD VERIFICATION OF SITE CONDITIONS. Unless otherwise specified, all valves must be coated per manufacture's standard recommendations for intended use.

2.2.1 Resilient Seat Wedge Gate Isolation Valves

Resilient Seat Wedge Gate valves shall conform to AWWA C515. Valves shall have a ductile iron body, stainless steel stem, bronze mounted trim, bolted bonnet and EPDM rubber encapsulated ductile iron wedge. Each valve shall be provided with a non-rising stem and a geared handwheel operator with chain for valves located more than 6 feet above the floor. For valves located at EL 176 and 207 provide the necessary shaft extensions and operator base as shown on plans. Shaft segments, couplings, bushings and operator base shall be provided per manufactures recommendation. Shaft supports for draft tube valves shall be supplied per valve manufacturer's specifications to maintain shaft alignment and be anchored to wall per SECTION 05 05 20.00 28 POST-INSTALLED ANCHORS IN CONCRETE. Valves shall open when turned counter-clockwise. Valves operators shall be color code as follows, normally open green, normally closed red and anything else yellow. The Contractor shall submit the following product data:

Resilient Seat Wedge Gate Isolation Valves

Valve Operator Color Schedule

NOTE: Penstock Drain valves shall be Resilient Seat Wedge Gate Isolation Valves.

2.2.2 Equalizer Valves

Supply two spare equalizer valves for direct replacement of existing 24 inch 100s Stockholm 150 OWG valves. Spare valves must be resilient seat wedge gate valves. Spare equalizer valves shall be on-site prior to start of construction work.

Spare Equalizer Valves

2.2.2.1 Equalizer Valve Packing

Supply and install new stem packing for all existing equalizer valves.

Equalizer valves are vintage 1952, 24 inch 100s Stockholm 150 OWG. Submit product data from packing manufacturer showing the design of the new custom packing will work with existing valves.

Equalizer Valve Packing

2.2.3 Silent Check Valves

The check valve shall be a silent type check valve and begin to close as forward flow diminishes and be fully closed at zero flow velocity preventing flow reversal and resultant water hammer or shock. The valve body shall be constructed of ductile iron meeting ASTM A536 class 150.

The valve shall be provided with flanges according to ASME B16.42 class

150. The Contractor shall submit the following product data:

Silent Check Valves

2.2.4 Double Wafer Check Valve

Double wafer check valve will consist of a double flap springs assisted design, Buna-N O-ring seal, and cracking pressure of not more than 0.3 psi. The valve body shall be constructed to meet ASME Class 150. The valve shall be of lug body design or be provided with flanges according to ASME B16.42 class 150. All internal working components such as pins, hinge and wafer shall be stainless steel. The Contractor shall submit the following product data:

Double Wafer Check Valve

2.2.5 Unwatering Discharge Plug

a. The Unwatering Discharge Plug shall be installed into the unwatering 18 inch discharge pipe located in the tailrace at elevation

260. Contractor must first remove the broken 18 inch flapper valve.

Plug shall be blind flange with 3 inch air snorkel. The snorkel shall reach a minimum elevation of 275 when installed and terminate in a goose neck configuration. Air snorkel shall be made out of schedule 40 steel pipe. Supply 18 inch gasket to ensure a good seal between blind flange and pipe. Contractor shall verify the condition of the embedded flange prior to plug fabrication during the fish ladder outage of 2023. The contractor shall submit the following shop drawing:

Unwatering Discharge Plug

b. After removal from the Unwatering Discharge pipe, the Unwatering Discharge Plug will become property of the Government. Turn the plug over to the Contracting Officer after removal. Dispose of broken flapper valve.

2.2.6 Ball Valves

Ball valves for pipe sizes less than 2.5 inches shall conform to the requirements of MSS SP-110 full port design, copper alloy. Valves shall have two-position lever handles.

2.3 MISCELLANEOUS PIPING MATERIALS

Supply all needed pipe fitting materials to include, but not limited to:

bolts, nuts, gaskets, etc. Re-use of such materials is prohibited. Submit product data for all miscellaneous piping materials.

2.3.1 Flanges and Gaskets

Flanged fittings, including flanges, bolts, nuts, bolt patterns, etc., shall be in accordance with ASME B16.5 Class 150 and shall have the manufacturer's trademark affixed in accordance with MSS SP-25 . Flange material shall conform to ASTM A 105/A 105M . Blind flange material shall conform to ASTM A 516/A 516M . Bolts shall conform to ASTM A320/A320M . Flange gaskets shall be full face flat type gaskets conforming to the requirements of ASME B16.21 . Flange gaskets for the collection piping in the drainage sump, and EL 207 Gallery piping with flange connection to concrete, shall be Nitrile rubber suited for non-potable water service and resistant to a wide range of oils, greases and other lubricants. Flange gaskets for the pump discharge piping shall be suited to non-potable water service with galvanized piping.

2.3.2 Mechanical Couplings

Mechanical couplings for use with grooved ends are acceptable for piping 8 inch diameter and less. Provide pipe ends grooved by roll grooving or with welded-on adapters and cut grooves in accordance with AWWA C606. Provide grooves as recommended by the coupling manufacturer.

2.3.3 Threaded Fittings

Threaded fittings shall be made of galvanized malleable iron and conform to the requirements of ASME B16.3 class 150. Threaded joints shall have American Standard taper pipe threads conforming to ASME B1.20.1 .

2.3.4 Expansion Joints

Expansion joints shall be made of EPDM with galvanized carbon retension rings sized to match piping. Joints shall have a minimum working pressure of 115 psi. Contractor shall verify size of each joint needed.

2.3.5 Flanged Coupling Adapter

Adapter body shall be per ASTM A536 Grade 65-45-12. Flange shall meet AWWA C207 Class D and per ANSI B16.1 Class 125 with O-ring material being NBR (Buna-N). Coupling gasket to meet ASTM D2000.

2.3.6 Welded Outlets

Where indicated branches in pipe spools shall be made using welded branch outlets. Outlets shall be designed for their intended purpose and made of a material compatible with the pipe spool. Outlets shall be formed to allow a full penetration weld between the pipe spool and outlet. Outlets shall be sized to match the branch pipe size.

2.3.7 Pressure Gauges

Pressure gauges shall be installed as indicated. Gauges shall be of the pressure indicating dial type, glycerin filled with an elastic element.

Gauges shall conform to the minimum requirements of ASME B40.100 . Gauges shall have a minimum 6 inch diameter face and be equipped with an isolation valve.

2.3.8 Offset Pipe Clamps

Offset pipe clamps in the drainage sump shall be stainless steel to match the material of the pipe which they support and be of the size required to fit the pipe supported. Material shall be minimum 1/4" by 1-1/2" for 4" pipe and minimum 1/4" by 2" for 6" pipe.

2.3.9 Draft Tube Drain Tee

Draft tube drain tee's shall be class 150 conforming to AWWA C110/A21.10 and coated per AWWA C116/A21.16 .

2.3.10 Custom Suction Bell

The suction bells shall be fabricated according to the plans, meeting ASTM A 53 and, along with its support piping, be coated in accordance with AWWA C213. Flange connection shall be per ASME B16.5 . Suction bell shall be fabricated and inspected per SECTION 05 50 14.00 28 STRUCTURAL METAL

FABRICATIONS.

2.3.11 Drainage Header Clean Out

The drainage header cleanout must be coated in accordance with AWWA C213.

PART 3 EXECUTION

3.1 INSTALLATION

Installation of plumbing systems including piping, equipment, materials, and workmanship shall be in accordance with the ICC Plumbing Code , except as modified herein. Plastic piping shall not be permitted.

3.1.1 Pipe Plug Installation

The unwatering pipe plug shall be installed prior to removal and replacement of the 18 inch unwatering pump isolation gate valve. Plug to be removed immediately after installation of the isolation valve.

3.1.2 Piping Joints

Installation of pipe and fittings shall be made in accordance with the manufacturer's recommendations. Mitering of joints for elbows and notching of straight runs of pipe for tees will not be permitted. Joints shall be made up with fittings of compatible material and made for the specific purpose intended.

3.1.2.1 Threaded

Only male pipe threads shall be coated with graphite or with an approved graphite compound, or with an inert filler and oil, or shall have a polytetrafluoroethylene (PTFE) tape applied.

3.1.2.2 Unions and Flanges

Unions, flanges and mechanical couplings shall not be concealed in walls, ceilings, or partitions. Unions shall be used on pipe sizes less than 4 inches ; flanges shall be used on pipe sizes 4 inches and larger.

3.2 FIELD QUALITY CONTROL

3.2.1 Inspections

Prior to initial operation, inspect piping system for compliance with drawings, specifications, and manufacturer's submittals.

3.2.2 Field Testing

Each system shall be tested as in service in order to demonstrate compliance with the contract requirements before final acceptance of the work. Perform the following tests in addition to the tests specified in the Plumbing Code, except as modified herein. The results of each test shall be submitted in report form. Defects in the work shall be corrected by the Contractor, and tests repeated until work is in compliance with contract requirements. All corrections and subsequent testing shall be done at no additional cost to the Government. The Contractor shall furnish water, electricity, instruments, connecting devices, and personnel for performing tests.

3.2.2.1 Water Piping Test Plan

Hydrostatically test all pump discharge piping systems in accordance with ASME B31.3 . Vent or flush air from the piping system. Pressurize system for 10 minutes with water at one and one-half times design working pressure of the pump, then reduce to design working pressure and check for leaks and weeps. Contractor shall submit a test plan for approval. No rupture, cracking or permanent distortion of any part of the pump shall be observed in a test when hydrostatically tested at the required pressure.

The Contractor shall submit the following:

Water Piping Test Plan

3.3 WELD TESTING

Test unwatering and drainage pump discharge piping welds in accordance with the AWS D1.1/D1.1M ultrasonic test (UT) method.

Discharge Piping Weld Test

3.4 IDENTIFICATION SYSTEMS

3.4.1 Identification Tags

Identification tags made of engraved laminated plastic or engraved anodized aluminum shall be installed on all valves. Tags shall be 4-1/2 inch wide by 3-1/2 inch tall, and marking shall be stamped or engraved. If the tag is indoors and protected from UV light it can be a plastic tag, if the tag is in an exterior or exposed to UV light then the tag shall be engraved anodized aluminum. Indentations for tags should be green on white with white lettering. Information on the tag shall include the valve ID #, description, location, elevation. Tags shall be attached to valves with two corrosion resistant cables or clamp on fasteners. Submit identification tag template and valve list prior to tag fabrication.

3.4.2 Pipe Labels

All piping shall have labels in accordance with ASME A13.1 . Drainage and Unwatering Sump discharges are considered drains. See attached McNary Piping Color Marker Identification and Label Scheme.

-- End of Section --

THIS PAGE INTENTIONALLY LEFT BLANK

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 01 30.16 28

DRAINAGE HEADER DEBRIS REMOVAL

PART 1 GENERAL

1.1 DEFINITIONS

1.1.1 CCTV Video

1.1.2 Cleaning

1.1.3 Defects

1.1.4 Entry Point

1.1.5 Heavy Cleaning

1.1.6 Hydraulically Propelled Cleaning Tools

1.1.7 National Association of Sewer Service Companies (NASSCO)

1.1.8 Pipe Segment

1.1.9 Pipeline Assessment and Certification Program (PACP)

1.1.10 Point Repair

1.1.11 TV Inspection Log

1.2 ADMINISTRATIVE REQUIREMENTS

1.2.1 Disposal Plan

1.3 SUBMITTALS

1.4 QUALITY CONTROL

1.4.1 CCTV Technician's Qualifications

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.1.1 Drainage Header Debris

2.2 EQUIPMENT

2.2.1 Cleaning Equipment

2.2.1.1 Rodding

2.2.1.2 Hydraulic Flusher

2.2.2 CCTV Equipment

2.2.2.1 Pipe Inspection Camera and Associated Equipment

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Drainage Header Cleaning

3.1.2 Flow Control

3.1.3 Material Removal and Disposal

3.1.3.1 Sludge and Debris Storage

3.1.3.2 Hauling of Waste Material

3.2 APPLICATION

3.2.1 Inspection of Drainage Header

3.2.1.1 Camera Operation

3.2.1.1.1 Recording Defects

3.2.1.2 Documentation of CCTV Inspection

3.2.1.2.1 Video Recordings

3.2.1.2.2 TV Inspection Logs

SECTION 33 01 30.16 28

3.2.1.2.3 Digital Photographs

3.2.2 Check Valve Inspection

-- End of Section Table of Contents --

SECTION 33 01 30.16 28

SECTION 33 01 30.16 28

DRAINAGE HEADER DEBRIS REMOVAL

PART 1 GENERAL

1.1 DEFINITIONS

1.1.1 CCTV Video

CD or DVD storage media containing the recorded video.

1.1.2 Cleaning

To remove soil or solid deposited materials from a pipe segment.

1.1.3 Defects

Defects in the pipe, manholes, structures, and services include cracks, separation of joints, collapsed pipe, grade irregularities, leaks, roots, grease buildup, offset joints, reverse grades, obstructions, delamination, missing pipe, restrictions, fractures and similar structural irregularities.

1.1.4 Entry Point

The leading edge of the access point located at the clean out sump on elevation 176 or the leading edge of the header inside the drainage sump upon removal of the check valve.

1.1.5 Heavy Cleaning

To remove soil or solid deposited materials from a pipe segment when the materials in the pipe are between half full to full.

1.1.6 Hydraulically Propelled Cleaning Tools

Tools that depend upon water pressure to provide their cleaning force.

1.1.7 National Association of Sewer Service Companies (NASSCO)

National Association of Sewer Service Companies (NASSCO) identifies the generally accepted industry standards for CCTV inspection, observation coding, and certification.

1.1.8 Pipe Segment

The length of pipe from entry point to exit point along the main or service.

1.1.9 Pipeline Assessment and Certification Program (PACP)

A CCTV Inspection standardization certification and observation coding system sponsored by NASSCO.

1.1.10 Point Repair

The location of a failure where a repair has occurred.

1.1.11 TV Inspection Log

Information collected and recorded by the CCTV operator for each CCTV inspection effort and includes pertinent information for the respective inspection section; such as, date of inspection, location of site, CCTV technician, direction of CCTV inspection with manhole or structure identifiers, weather conditions, pipe size(s), pipe materials, conditions found, locations where the conditions were found.

1.2 ADMINISTRATIVE REQUIREMENTS

1.2.1 Disposal Plan

Submit a disposal plan prior to performing any work that might generate waste materials. Include a complete description of the materials that are expected to be encountered and their proposed disposal sites. No changes to the disposal plan will be made without prior written acceptance by the Contracting Officer.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" or "I" classification. Submittals having an "I" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-01 Preconstruction Submittals

Cleaning Procedures ; G, ME

SD-06 Test Reports

Documentation Of CCTV Inspection ; G, ME

SD-07 Certificates

Disposal Plan ; G, C

CCTV Technician's Qualifications ; G, C

1.4 QUALITY CONTROL

1.4.1 CCTV Technician's Qualifications

Provide a CCTV technician with three years of total experience with the CCTV technology. Submit a current PACP Operator certification for personnel performing closed circuit television inspection and pipeline assessments.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Debris removal and un-clogging of 8 inch drainage header encompasses cleaning, heavy cleaning, CCTV inspection and video recording of the existing embedded drainage header that runs the length of the power house.

Drainage header has a complete blockage approximately located between Main Units 7 and 8. The drainage header is 6 inches in diameter between Main Units 9 and 14. Additionally all drains in the 207 gallery shall be cleaned once the drainage header has be cleaned out.

It includes the mechanical equipment used to clean and dispose of the materials found in drainage header and structures, CCTV cameras and recording devices used to record the internal conditions of non-pressurized piping.

2.1.1 Drainage Header Debris

Assume drainage header debris is mainly composed of sediment and algae growth, with some rubble. Reference Sheet M-903, photo H15: Assume bottle is a glass bottle, approximately 2 inches in diameter, and that rubble seen in photo is approximately representative of expected rubble size. Photo was taken via camera at the junction of the EL 207 Gallery gutter drain and 8" drainage header, between Main Units 8 and 7.

Reference Sheet R-023 for schematic of Drainage System.

2.2 EQUIPMENT

2.2.1 Cleaning Equipment

Utilize mechanically powered equipment necessary for the proper rodding, brushing, and flushing of the drainage header, including a heavy duty power rodding machine that is compatible with the cleaning to be performed.

2.2.1.1 Rodding

Provide rodding equipment capable of rodding distances of up to 1500 feet in one set-up and having the following capabilities:

a. The ability to spin the rod either clockwise or counter-clockwise, and be able to be pushed straight out or pulled back without rotating the machine.

b. The capability of pulling pipe-size swabs or brushes back through the pipeline for cleaning and flushing purposes.

2.2.1.2 Hydraulic Flusher

Provide hydraulic high-pressure cleaners used for header cleaning, specifically designed and constructed for such cleaning, that have a minimum usable water capacity of 600 gallons and a pump capable of delivering at least 30 gallons per minute (gpm) at 100 psi and having the following capabilities:

a. Pressure regulator nozzle capable of adjustment from 1 psi to 1500 psi .

b. Constructed for ease of use and safety of operation with two or more high-velocity nozzles capable of producing a scouring action from 15

SECTION 33 01 30.16 28

to 45 degrees in lines designated to be cleaned.

c. A high-velocity gun for washing and scouring the clean out sump walls and floor capable of producing flows from a fine spray to a solid stream.

d. Carry its own water tank, auxiliary engines, pumps, and hydraulically driven hose reel.

2.2.2 CCTV Equipment

Provide a video system capable of producing a sharply focused, well-lit and color balanced picture in accordance with the following requirements:

2.2.2.1 Pipe Inspection Camera and Associated Equipment

a. Provide a pipe inspection camera system that produces a video using a pan and tilt, radial viewing, that pans a minimum of 275 degrees and rotates 360 degrees. Illumination sensitivity of 3 Lux or less and a minimum of 460 lines of resolution is required.

b. Utilize video cameras specifically designed and constructed for CCTV inspection.

c. Provide a camera that is operative in 100 percent humidity conditions.

d. Provide a camera with an accurate footage counter that displays on the monitor the exact distance of the camera to the nearest 1/10 of a foot .

e. Provide a camera with a height adjustment so that the camera lens is typically centered in the pipe, or higher depending on water levels in the pipe.

f. Provide equipment that will produce digital color images and allows the CCTV technician to remotely balance the iris and color to produce a clear and true video of the pipeline.

g. Provide lighting for the camera that is suitable to provide a clear color picture of the entire periphery of the pipe.

h. Provide a reflector in front of the camera as necessary to enhance the lighting on dark or large diameter pipes.

i. Provide an accompanying computer and recording device capable of projecting and recording the facility location, project name, Contractor's name, date, line size, material type, line identification, manhole or structure ID numbers and ongoing footage counter onto the video screen.

PART 3 EXECUTION

3.1 PREPARATION

Within a minimum of 45 days prior to cleaning out the drainage header, the contractor shall submit cleaning procedures . The cleaning procedures shall include all equipment used and the step by step process of cleaning out the drainage header.

3.1.1 Drainage Header Cleaning

Immediately prior to conducting CCTV activities, thoroughly clean the drainage header. Clean the header using hydraulically propelled, high-velocity jet, or mechanically powered equipment.

a. During cleaning and preparation operations, undertake precautions to protect the system and property from damage. Restore property damaged as a result of such cleaning and preparation operations to pre-existing conditions.

b. During the course of normal cleaning operations immediately report pre-existing damage such as broken or missing pipe to the Contracting Officer.

c. When hydraulically propelled cleaning tools or tools which retard the flow in the drainage header are utilized, take precautions to ensure that the water pressure created does not damage or cause flooding on the adjacent site.

3.1.2 Flow Control

Approximately 40,000 gallons of water is stored in the draft tube valve pits, due to the drainage header clog. Sudden removal of this clog will result in an initial in rush of water. Ensure drainage sump is kept below elevation 176 during debris removal to ensure elevation 176 does not flood.

3.1.3 Material Removal and Disposal

Remove sludge, dirt, grease, and other solid or semi-solid material resulting from cleaning operations at the sump.

3.1.3.1 Sludge and Debris Storage

Under no circumstances is sludge or other debris removed during these operations to be stored, dumped or spilled into streets, ditches, storm drains, or other sanitary sewer systems.

a. Dispose of solids and semi-solids resulting from the cleaning operations no less often than the end of each work day in accordance with the approved Disposal Plan.

b. Under no circumstances will debris be allowed to accumulate on the work site beyond the end of each work day, except in totally enclosed containers and as acceptable by the Contracting Officer.

c. Continuously maintain the haul route and work areas neat, clean, and reasonably free of odor. Clean up any spill which occurs during the transport of cleaning or surface preparation by-products. Perform the cleanup of any such material pursuant to this Contract and in accordance with applicable law and environmental regulations.

d. Immediately notify the Contracting Officer of any spill and begin clean up of any such spill or waste.

e. The Government will charge to the Contractor for any costs incurred or penalties imposed upon the Government as a result of the spill, dump or discard.

f. Under no circumstances is this material to be discharged into the waterways or any place other than where authorized to do so in accordance with the approved Disposal Plan.

3.1.3.2 Hauling of Waste Material

Provide vehicles hauling such waste material that meet the following requirements:

a. Provide transport vehicles of the type(s) approved for this application by the jurisdictions where those vehicles will be operated in the performance of activities associated with this Contract.

b. Provide transport vehicles with watertight bodies equipped and fitted with seals and covers to prohibit material spillage or drainage.

c. Clean vehicles to prevent deposits of material on roadways.

d. Load vehicles within legal weight limits and operate safely within traffic speed regulations.

e. The routes used for the conveyance of this material on a regular basis is subject to approval by the local governing bodies having jurisdiction over such routes.

3.2 APPLICATION

3.2.1 Inspection of Drainage Header

Inspection of drainage header lines applies to Pre-TV inspection, Post-TV inspection, RE-TV inspection and Warranty-TV inspection. Perform inspections of drainage header lines in the presence of the Contracting Officer. Broken piping must be repaired per SECTION 33 01 30.72 28

DRAINAGE HEADER POINT REPAIR.

3.2.1.1 Camera Operation

Set counter to 0.00 feet at the entry point. Move the camera through the line in either direction at a moderate speed, stopping to permit proper documentation of the drainage header condition or service connection locations. In no case will the camera be operated at a speed greater than 60 feet per minute . Slowly pan and tilt the camera at the beginning and ending, structure connections, service connections, joints, visible defects, and pipe arterial transitions. Provide a full 360 degree view of the pipe, joints, and service connections.

Utilize manual winches, power winches, cable, powered rewinds or other devices that do not obstruct the camera view or interfere with camera operation or CCTV inspection of the pipe conditions as the camera is moved through the drainage header line.

3.2.1.1.1 Recording Defects

During CCTV inspection, temporarily stop the camera at each defect or feature along the line.

3.2.1.2 Documentation of CCTV Inspection

Documentation of CCTV inspection applies to Pre-TV inspection, Post-TV inspection, RE-TV inspection and Warranty-TV inspection.

Utilize a data logger and reporting system that is PACP compliant to make a video and audio recording of the CCTV inspections. Submit video recordings, inspection logs and digital photographs as indicated below.

3.2.1.2.1 Video Recordings

Provide a color video showing the completed work and document the inspection on a digital recorder. Capture inspection video in either MPEG4 or Windows Media Video (WMV) format with a minimum resolution of 352 x 240 pixels and an interlaced frame rate at a minimum of 24 frames per second. Save video on CD or DVD. However, the CCTV inspection video of a segment must be wholly contained on a single CD or DVD. The video recording must meet the following requirements:

a. Provide a continuous and uninterrupted recorded video for the pipe segment being examined. Include the official project title, Contracting party, Contractor's name, street name, manhole or structure ID numbers, direction of video and flow, date and time video was recorded, continuous counter text, pipe size and material, material changes in the pipe segment, audio and text call outs of laterals, fixtures and problem areas in the recorded video.

b. Include an audio track recorded by the CCTV technician during the actual inspection work with a description of the parameters of the line being inspected on the video recordings. The audio may be from the voice of the CCTV technician or it may be computer generated.

c. Include the location, pipe diameter, pipe material, defects, service lateral locations and any unusual conditions found in PACP format.

d. Submit labeled CDs or DVDs of the video inspections.

e. Without exception, CCTV inspections must be continuous without video interruption or gaps for pipe segments.

f. Clean, flush, and RE-TV pipe segments with video interruptions or gaps.

3.2.1.2.2 TV Inspection Logs

Submit computer generated records that clearly show the location and orientation.

Record other points of significance such as locations and orientations of service connections, missing or broken pipe, the presence of grease, scale or corrosion, bellies, fractures, cracks, and other discernible features using PACP designations.

3.2.1.2.3 Digital Photographs

Submit JPEG images at a minimum resolution of 640 x 480 pixels. Save digital photographs in JPEG file format on CD or DVD. Document noted defects and lateral connections as color digital files and hard copy print-outs. Photo logs are to accompany each photo submitted.

3.2.2 Check Valve Inspection

If contractor chooses to clean header out from the clean out sump, the check valve located at the end of the drainage header located inside the drainage sump must be inspected to ensure it is free of debris.

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