B.08.03 Amendment 0003 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 the 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 30-Sep-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 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

30-Sep-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 - 0003 McNary Powerhouse Drainage, Unwatering, and Equalization System Rehabilitation

W912EF22R0015

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

a. SECTION 01 14 00.20 28 WORK AND OPERATIONAL RESTRICTIONS

• Revised Paragraph 1.2.1 "Coordination for Adult Fish Passage Impacts"

b. SECTION 01 55 10.00 28 CONTRACTOR WORK, ACCESS AND STORAGE AREAS

• Revised Paragraph 1.4.1 "Work and Storage Areas"

c. SECTION 03 30 70.00 28 CONCRETE DEMOLITION, REPAIR OF CONCRETE

SURFACES, AND EQUIPMENT FOUNDATIONS

• Revised Paragraph 3.4.10 "Finished Surface Tolerance"

d. SECTION 22 11 00.01 28 PIPING AND VALVES

• Revised Paragraph 1.2 REFERENCES

• Revised Paragraph 2.1.1 "Galvanized Steel Piping"

• Revised Paragraph 2.2.5 "Unwatering Discharge Plug"

• Revised Paragraph 2.3.1 "Flanges and Gaskets"

• Revised Paragraph 2.3.10 "Custom Suction Bell"

• Added Paragraph 2.3.11 "Drainage Header Clean Out"

2. Revised the following Drawings (See clouded areas for revisions).

a. SHEET SD101

b. SHEET M-101

c. SHEET M-201

d. SHEET M-202

(End of Summary of Changes)

MNA Powerhouse Drainage_Unwatering_Equalization System Rehab W912EF22R0015 Amend-0003

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 14 00.20 28

WORK AND OPERATIONAL RESTRICTIONS

PART 1 GENERAL

1.1 WORK PHASE REQUIREMENTS

1.1.1 Remaining Contract Work

1.2 GENERAL REQUIREMENTS

1.2.1 Coordination for Adult Fish Passage Impacts

1.3 PHASE 1 - DRAINAGE SYSTEM AND MAIN TURBINE UNIT VALVE UPGRADES

1.3.1 Phase 1 Work Sequencing Requirements

1.3.2 Phase 1 Work Restrictions

1.4 PHASE 2 - UNWATERING SYSTEM UPGRADES

1.4.1 Phase 2 Work Sequencing Requirements

1.4.2 Phase 2 Work Restrictions

1.5 PHASE 3 - STATION SERVICE TURBINE UNIT VALVE UPGRADES

1.6 MAIN UNIT OUTAGE REQUIREMENTS

1.6.1 Main Unit Outage Scheduling

1.7 STATION SERVICE UNIT OUTAGE REQUIREMENTS

1.7.1 Station Service Unit Outage Scheduling

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

-- End of Section Table of Contents --

SECTION 01 14 00.20 28

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SECTION 01 14 00.20 28

SECTION 01 14 00.20 28

WORK AND OPERATIONAL RESTRICTIONS

PART 1 GENERAL

This SECTION contains Work Restriction requirements and information. If conflicts are found between this SECTION and other areas of the Plans and Specifications, notify the Contracting Officer (KO).

NOTE:

a. Due t o bl ockage i n t he Dr ai nage header ( bet ween Mai n Uni t s 7 and

8) , Dr af t Tube Dr ai n Val ve pi t s f or Mai n Tur bi ne Uni t s ( Mai n Uni t s) 7- 14 ar e cur r ent l y f l ooded and not avai l abl e f or Cont r act or access.

Bl ockage i n t he Dr ai nage Header must be r emoved pr i or t o access t o t hese ar eas. See SECTION 33 01 30.16 28 DRAINAGE HEADER DEBRIS REMOVAL for additional information.

b. A maxi mum of t wo ( 2) Mai n Uni t s wi l l be r emoved f r om ser vi ce f or Mai n Uni t Dr ai nage and Equal i zer Val ve upgr ades, pr i or t o Dr ai nage Header bl ockage r emoval . Bl ockage must be compl et el y r emoved bef or e addi t i onal Mai n Uni t s wi l l be r emoved f r om ser vi ce, f or wor k on t hi s contract.

c. See Sheet M- 901 for Unwatering Pump Isometric. Includes overall configuration of Unwatering and Drainage System piping and pumps.

d. See Sheet M- 601 for Powerhouse Valve Schedule.

1.1 WORK PHASE REQUIREMENTS

Work on this Contract shall be complete, as specified and required, in the identified Phases. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK, for additional information.

a. Phase 1 - Drainage System and Main Turbine Unit Valve Upgrades.

b. Phase 2 - Unwatering System Upgrades.

c. Phase 3 - Station Service Turbine Unit Valve Upgrades.

1.1.1 Remaining Contract Work

All work not associated with a specific time period or work phase, shall be scheduled by the Contractor and included in the accepted Project Schedule. See SECTION 01 32 01.00 28 PROJECT SCHEDULE for additional information.

1.2 GENERAL REQUIREMENTS

The following requirements apply to all work on this Contract:

a. Prior to removing any of the following from service, all valves, parts, equipment, etc. required to upgrade and return each component to service, must be on-site and accepted for installation by the

Contracting Officer (KO):

1. Main Turbine Units (Phase 1).

2. Station Service Turbine Units (Phase 3).

3. All or part of the Drainage pump system, including intake and discharge piping, and valves (Phase 1).

4. All or part of the Unwatering pump system, including intake and discharge piping, and valves (Phases 1 and 2).

b. The following restrictions apply to work on, and/or use of, upgraded Fishway Drain Flush Line Piping:

1. Required piping upgrades shall occur outside of the Adult Fish Passage Work Window (Phase 1).

2. Fishway Drain Flush Line Piping upgrades must be complete prior to use for routing of Unwatering and/or Drainage Sump discharge flows.

3. Restrictions apply to routing of Unwatering and/or Drainage Sump discharge flows through upgraded Fishway Drain Flush Line Piping. See paragraph "Phase 2 Work Restrictions" for additional information.

c. Contractor access to and/or work in the Drainage Sump is restricted to the Phase 1 timeframe. Contractor access to and/or work in the Unwatering Sump is restricted to the Phase 2 timeframe.

d. Temporary pumping, and temporary power are responsibilities of the Contractor and will not be provided by the Government. See SECTION 02 24 10.02 28 DEWATERING, paragraph DEWATERING OF WORK AREAS for additional information.

e. Contractor shall NOT remove Government equipment from service, and/or adjust Government equipment or valves, unless approved, in writing, by the KO.

1.2.1 Coordination for Adult Fish Passage Impacts

a. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK for Adult Fish Passage Work Window information. Restrictions apply to non-routine maintenance activities and construction work when fishladders are operational. Restrictions do NOT apply during fishladder outages.

b. When fishladders are operational, non-routine maintenance and construction activities meeting the following conditions require coordination via a Memorandum of Coordination (MOC) a minimum of 3 weeks prior to impacts to operations. Coordinate anticipated impacts with the KO.

1. Deviations to powerhouse unit priority or any work that affects operation of fish pumps.

2. Work within 100 feet of any fishway entrance or exit.

SECTION 01 14 00.20 28

3. Work within 50 feet of any other part of the adult fishway. The adult fish passage season occurs from 1 March through 31 December, annually. Deviations to powerhouse unit priority or any work that affects operation of fish pumps, or creates noise within 100 feet of a fish ladder requires coordination via a Memorandum of Coordination (MOC) a minimum of 3 weeks prior to impacts to operations. Coordinate anticipated impacts with the KO.

1.3 PHASE 1 - DRAINAGE SYSTEM AND MAIN TURBINE UNIT VALVE UPGRADES

Complete the following required work during Phase 1 - Drainage System and Main Turbine Unit Valve Upgrades:

a. All work related to Drainage System upgrades, including, but not limited to the following:

1. Drainage pump, and related piping and valve upgrades.

2. Drainage sump work.

3. All Drainage header upgrades, repairs, and related work.

Includes Drainage header blockage removal, and Drainage header point repair, if needed.

4. All Cleanout Sump upgrades, including concrete removal, pump replacement, and cleanout and valve upgrades.

b. Fishway Drain Flush Line piping upgrades.

c. Upgrades/replacements of all Unwatering Pumps, as shown and specified.

d. Replacement of Unwatering Pump #3 motor . Temporary power required. See SECTION 02 24 10.02 28 DEWATERING, paragraph DEWATERING OF WORK AREAS, for Temporary Power information.

e. Unwatering Pump Inlet Valves and Piping Upgrades. See Sheet M-401 for reference. Includes 14" Isolation Gate Valves and related piping on the inlet side of the Unwatering Pumps.

1. NOTE: Does NOT include suction pipes inside Unwatering Sump.

f. ALL Main Unit Draft Tube Drain Valves, Draft Tube Drain Valve Tees, Scroll Case Drain Valves, and Equalizer Valves replacements and refurbishments.

1. NOTE: See paragraph MAIN UNIT OUTAGE REQUIREMENTS for additional information.

1.3.1 Phase 1 Work Sequencing Requirements

The following tasks have sequencing requirements and must be completed in the order as specified. List may not be all inclusive:

a. Cl eanout Sump concr et e r emoval must be completed prior to Drainage Header Blockage Removal.

b. Dr ai nage Header Bl ockage Removal must be completed prior to the following:

1. Access to Draft Tube Drain Valve Pits for Main Units 7-14.

2. Removal of additional Main Units as specified in paragraph GENERAL.

SECTION 01 14 00.20 28

3. Removal of 8" PVC Drainage Header and reconnection of 6" Drain Pipes to original Header in EL. 207 Gallery. See al so i t em " Dr ai nage Header Pi pe Poi nt Repai r " bel ow.

c. Dr ai nage Header Pi pe Poi nt Repai r (if needed) must be completed prior to removal of 8" PVC Drainage Header and reconnection of 6" Drain Pipes to original Header in EL. 207 Gallery.

d. Dr af t Tube Dr ai n Val ve, and Dr af t Tube Dr ai n Val ve Tee r epl acement must be completed prior to replacement of Scroll Case Drain Valve and Equalization Valve upgrades, for each Main Unit.

1.3.2 Phase 1 Work Restrictions

The table below lists Phase 1 Work items with specific restrictions. List is not necessarily in sequence (unless identified as such), is not inclusive of all required work, and may not reflect all restrictions found in the Plans and Specifications. Refer to the plans and specifications for additional information. Plan sheet references are for information only and do not include all related Plan sheets.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Cleanout Sump concrete removal, EL 176 fmsl.

See sheets SD101 and S-101.

N/A N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Remove Drainage Header Check valve in Cleanout Sump.

See Sheet MD402, Section A2.

EL 172

fmsl

N/A

Drainage Header Blockage Removal

EL 172

fmsl

N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements", and paragraph GENERAL.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Install New Drainage Header Clean out in Cleanout Sump.

See Sheets M-202, M-401.

EL 172

fmsl

N/A

Drainage Header Pipe Point Repair.

EL 172

fmsl

Verify required elevation.

N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Option Work. See SECTION

SECTION 33 01 30.72 28

DRAINAGE HEADER POINT REPAIR

for additional information.

Required Drainage Sump WSE dependent on elevation of damaged pipe.

Remove 8" PVC Drainage Header; Reconnect 6" Drain Pipes to original Header in EL. 207 Gallery.

See Sheets MD203, M-402 detail A1.

N/A N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Drainage Pump and Upper Discharge Piping replacement. Install drainage sump baffle box, and seismic bracing on Drainage Pump intake pipe.

See Sheets S-201, MD101, MD201, M-101, M-201.

Empty Drainage Sump

N/A Requires temporary pumping of Drainage Sump inflows into Unwatering Sump.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Fishway Drain Flush Line Piping upgrades.

See Sheets MD202, M-202

N/A N/A Required piping upgrades shall occur outside of the Adult Fish Passage Work Window.

See paragraph GENERAL REQUIREMENTS for additional restrictions.

Unwatering Pumps Inlet Valves and Piping upgrades.

Sheets MD402, M-401.

See paragraph PHASE 1 -

DRAINAGE SYSTEM AND

MAIN TURBINE UNIT VALVE

UPGRADES for additional information.

EL 176

fmsl

EL 177

fmsl*

No additional Main Units unwatered during this work.

Does not include piping in Unwatering Sump.

Unwatering Pump and Motor Upgrades.

See Sheets MD202, M-201, M-202.

N/A N/A Minimum of two (2) Unwatering Pumps must be operational at all times.

Replacement of Unwatering Pump #3 motor. Temporary power required.

See SECTION 43 23 31.13 28

POWERHOUSE UNWATERING PUMPS

for additional information.

WORK I TEM MAX.

DRAINAGE

SUMP WSE

MAX.

UNWATERING

SUMP WSE

OTHER RESTRI CTI ONS

Main Turbine Unit Draft Tube Drain Valve, and Draft Tube Drain Valve Tee Replacement

See Sheets MD203, MD401, M-402.

N/A EL 177

fmsl*

Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

Unwat er i ng Sump WSE r est r i ct i on appl i es t o Dr af t Tube Dr ai n Val ve and Dr af t Tube Dr ai n Val ve Tee r epl acement , onl y.

No additional Main Units unwatered during Draft Tube Drain Valve, or Draft Tube Drain Valve Tee replacement.

Main Turbine Unit Scroll Case Drain Valve Replacement, and Equalizer Valve Upgrades.

See Sheets MD203, MD401, M-102, M-402.

N/A N/A Sequence requirements. See paragraph "Phase 1 Work Sequencing Requirements".

NOTES:

* Unwatering Sump WSE requirements limit Main Unit unwatering.

TABLE DEFINITIONS:

1. WSE: Water Surface Elevation.

2. fmsl: Feet Mean Sea Level.

3. N/A: Not Applicable.

1.4 PHASE 2 - UNWATERING SYSTEM UPGRADES

Complete all remaining Unwatering System work during Phase 2 - Unwatering System Upgrades. Required work includes, but is not limited to the following:

a. All work related to the Unwatering System Isolation Valve replacement, the 90 degree bend immediately downstream of the valve, and installation and removal of Unwatering Discharge Plug in the tailrace. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK for coordination requirements.

b. All Unwatering System discharge piping and valve replacement and upgrades.

c. All Unwatering suction piping upgrades, Unwatering sump concrete removal, and related sump work.

d. Replacement of remaining Unwatering Pump motors.

e. All Electrical Upgrades impacting the Unwatering System, including upgrades to the Motor Control Center (MCC).

1.4.1 Phase 2 Work Sequencing Requirements

The following sequencing requirements must be completed as specified. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK, for additional information. List may not be all inclusive:

a. Unwat er i ng Syst em I sol at i on Val ve Repl acement , and 90 degr ee bend i mmedi at el y downst r eam, must be completed prior to the following:

1. Replacement of Unwatering Pump Discharge Piping.

2. Replacement of Unwatering Pump inlet suction pipes in Unwatering Sump.

1.4.2 Phase 2 Work Restrictions

a. The table below lists Phase 2 work items with specific restrictions. List is not necessarily in sequence (unless identified as such), is not inclusive of all required work, and may not reflect all restrictions found in the Plans and Specifications. Refer to the plans and specifications for additional information. Plan sheet references are for information only and do not include all related Plan sheets.

b. NOTES:

1. Unwatering Pump #3 must be operational at all times during the Phase 2 timeframe. Temporary power may be required.

2. Use of upgraded Fishway Drain Flush Line Piping to reroute Unwatering and/or Drainage Sump discharge flows, shall NOT occur during the Oregon Fish Ladder outage, with one exception.

i. Rerouting of sump flows during the Oregon Fish Ladder outage will be required for replacement of the Unwatering System Isolation Valve, and adjacent 90 degree bend downstream of the valve. Dates for this work must be coordinated with the KO. See Contracting Clause 52.211-10 COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK for additional information.

WORK I TEM MAX. UNWATERI NG

SUMP WSE

OTHER RESTRI CTI ONS

Unwatering System Isolation Valve Replacement.

Includes replacement of 90 degree bend immediately downstream of Valve.

See Sheets MD202, M-202.

N/A Sequence requirements. See paragraph "Phase 2 Work Sequencing Requirements".

All work must be completed as identified in Contracting Clause 52.211-10

COMMENCEMENT, PROSECUTION, AND COMPLETION

OF WORK. Includes installation and removal of Unwatering Discharge Plug in the tailrace.

Requires Unwatering Sump discharge flows to be routed through upgraded Fishway Drain Flush Line Piping.

Unwatering Pump Discharge Piping replacement/upgrades.

See Sheets MD202, M-202.

N/A Sequence requirements. See paragraph "Phase 2 Work Sequencing Requirements".

Requires Unwatering Sump discharge flows to be routed through upgraded Fishway Drain Flush Line Piping.

Temporary Pumping may be required.

Unwatering Pump inlet suction pipes replacement (in Unwatering Sump).

Includes required concrete modifications.

See Sheets MD202, MD402, M-202, M-401

Empty Sequence requirements. See paragraph "Phase 2 Work Sequencing Requirements".

Requires the following:

1. Temporary pumping of Unwatering Sump in-flows to Drainage Sump.

2. Reconfiguration of Unwatering Pumps to pull from Drainage Sump and discharge through upgraded Fishway Drain Flush Line Piping.

WORK I TEM MAX. UNWATERI NG

SUMP WSE

OTHER RESTRI CTI ONS

Remove existing, and install new Unwatering System MCC (SQ02), Controls cabinet (SQ02C), and all related electrical work.

See Sheets ED101, ED201, E-101, E-201, E-501.

N/A Requires Temporary power to new Unwatering Pump Motors prior to removing MCC from service.

TABLE DEFINITIONS:

1. WSE: Water Surface Elevation.

2. N/A: Not Applicable.

1.5 PHASE 3 - STATION SERVICE TURBINE UNIT VALVE UPGRADES

Complete all work related to Station Service Turbine Unit drain valve upgrades, including, but not limited to the following. Plan sheet references are for information only and do not include all related Plan sheets.

a. Replacement of Draft Tube Drain Valves, and Draft Tube Drain Valve Tee. See Sheets MD403, M-403.

b. Replacement of Penstock Drain Valves, and rerouting of Penstock Drain piping. See Sheets MD204, M-203.

1.6 MAIN UNIT OUTAGE REQUIREMENTS

Main Unit outages are required for Main Turbine Unit Valve Upgrades (Phase 1 work). The following requirements apply to Main Unit Outages for work on this contract:

a. Main Units will be unwatered, prepared for Contractor work, rewatered, and returned to service by the Government.

b. Each Main Unit will be Out of Service one time only for work on this contract. All required work for the Out of Service Main Unit must be completed, commissioned, and accepted by the Government during this time.

c. A maximum of 2 (two) Main Units will be Out of Service at any time for work on this contract. Out of Service includes all of the following:

1. Government Unwatering and preparation of Main Unit for Contractor work (anticipate 4 Government work days duration per Main Unit). See SECTION 01 14 00.10 28 PROJECT SITE RESTRICTIONS, paragraph "Government's Work Schedule" for Government Work Days information.

2. Contractor removal, installation, upgrade, and commissioning of all Draft Tube Drain valves, Draft Tube Drain valve tees, Scroll Case Drain valves, and Equalizer valves for the Out of Service Main Unit.

3. Government acceptance of Contractor work and Government verification Main Unit is ready to return to service.

4. Government Rewatering of Main Unit and return to service (anticipate 4 Government work days duration per Main Unit).

d. Main Units will be taken out of service in non sequential, adjacent pairs that share Draft Tube Drain valve pits (Main Units 1 & 2; Main Units 3 & 4; Main Units 5 & 6; Main Units 7 & 8; Main Units 9 & 10; Main Units 11 & 12; Main Units 13 & 14). The Government will determine the order Main Unit pairs are removed from service, and will notify the Contractor a minimum of 14 calendar days prior to the next scheduled Main Unit outage.

e. Up to 2 Main Units may be unwatered prior to start of the following activities, but Main Unit unwatering will not be allowed during any of the following:

1. Draft Tube Drain Valve, and/or Draft Tube Drain Valve tee replacement.

2. Unwatering Pumps Inlet Valves and Piping replacement.

3. When a controlled WSE is required in the Unwatering Sump.

4. When Contractor personnel are in the Unwatering Sump.

f. The Government will unwater and prepare one Main Unit for Contractor work at a time. Two Main Units will not be prepared simultaneously.

g. Unwatering of one Main Unit and rewatering of another may occur simultaneously.

h. Main Units are critical to Project operation. Once a Main Unit is removed from service, the Contractor must work expeditiously on valve replacements and upgrades in order to return the Main Unit to service with minimal delay.

1.6.1 Main Unit Outage Scheduling

a. Coordinate Main Unit Outage dates a minimum of 21 calendar days prior to anticipated start of the Out of Service period, for each Main Unit. Conduct this coordination during Government's typical scheduled work days.

b. The Government will start to unwater the Main Unit pairs contingent upon the following:

1. Outage dates have been coordinated as required.

2. All parts and equipment required to be replaced or upgraded during the coordinated outage (of the applicable pair of Main Units), is on-site, and accepted for installation by the KO.

3. No more than one Main Unit is currently Out of Service for work on this contract. See paragraph MAIN UNIT OUTAGE REQUIREMENTS, subparagraph c. At no time will more than 2 Main Units be Out of Service for work on this contract.

1.7 STATION SERVICE UNIT OUTAGE REQUIREMENTS

Station Service Turbine Unit (Station Service Unit) outages are required for Station Service Turbine Unit Valve Upgrades (Phase 3 work). The following requirements apply to Station Service Unit Outages for work on this contract:

a. Station Service Units will be unwatered, prepared for Contractor work, rewatered, and returned to service by the Government.

b. A maximum of 1 (one) Station Service Unit will be Out of Service at any time for work on this contract. Out of Service includes all of the following phases:

1. Government Unwatering and preparation of Station Service Unit for Contractor work (anticipate 4 Government work days duration per Station Service Unit).

2. Contractor removal, installation, upgrade, and commissioning of all Penstock Drain Valves and piping, Draft Tube Drain Valves, and the Draft Tube Drain Valve Tee for Out of Service, Station Service Unit.

3. Government acceptance of Contractor work and Government verification Station Service Unit is ready to return to service.

4. Government Rewatering of Station Service Unit and return to service (anticipate 4 Government work days duration per Station Service Unit).

c. Each Station Service Unit will be Out of Service one time, only, for work on this contract. All required Station Service Unit work must be completed, commissioned, and accepted by the Government during this time.

d. The Government will determine the order Station Service Units are removed from service, and will notify the Contractor a minimum of 14 calendar days prior to Station Service Unit availability for Contractor work.

e. Station Service Units are critical to the Project operation. Once a Unit is removed from service, the Contractor must work expeditiously on valve replacements and upgrades in order to return the Station Service Unit to service with minimal delay.

1.7.1 Station Service Unit Outage Scheduling

a. Coordinate Station Service Unit Outage dates a minimum of 21 calendar days prior to anticipated start of each Station Service Unit Out of Service period. Conduct this coordination during Government's typical scheduled work days.

b. The Government will start to unwater the Station Service Unit contingent upon the following:

1. Outage dates have been coordinated as required.

2. All parts and equipment required to be replaced or upgraded during the coordinated outage (of the applicable Station Service Unit), is on-site, and accepted for installation by the KO.

3. No Station Service Units are Out of Service for work on this contract. See paragraph STATION SERVICE UNIT OUTAGE REQUIREMENTS, subparagraph b. At no time will more than 1 Station Service Unit be Out of Service for work on this contract.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

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SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 55 10.00 28

CONTRACTOR WORK, ACCESS AND STORAGE AREAS

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 CONTRACTOR'S STORAGE AND STAGING AREA

1.4 CONTRACTOR WORK AREA AND ACCESS TO WORK AREA

1.4.1 Work and Storage Areas

1.4.2 Access to Work Area

1.4.3 Use or Blockage of Powerhouse Main Door.

1.5 GOVERNMENT ROADWAYS AND DECK ACCESS RESTRICTIONS

1.6 TRAFFIC CONTROL AND PUBLIC ACCESS

1.6.1 Public Access Barriers

1.7 OVERHEAD BIRD EXCLUSION WIRES

1.8 BOAT RESTRICTED ZONE POLICY (BRZ)

1.9 RADIO AND TELEPHONE COMMUNICATION

1.10 PERMITS AND RESPONSIBILITIES

1.11 DUST CONTROL PLAN

1.12 HAULING MATERIAL

1.13 FIRE CONTROL

1.13.1 Fire Hazards

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

ATTACHMENTS:

Boat Restricted Zone (BRZ) Policy

-- End of Section Table of Contents --

SECTION 01 55 10.00 28

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SECTION 01 55 10.00 28

SECTION 01 55 10.00 28

CONTRACTOR WORK, ACCESS AND STORAGE AREAS

PART 1 GENERAL

The work covered by this section of the specifications consists of work common to more than one section of these TECHNICAL SPECIFICATIONS.

1.1 REFERENCES

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

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO LRFD (8th Edition; 2017) Bridge Design Specifications

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 Safety and Health Requirements Manual

Responsible for complying with the current edition and all changes posted on the web as of the effective date of this solicitation.

1.2 SUBMITTALS

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

submittals having an "I" designation are for information only. A designation following the "G" or "I" designation 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

Transport Loading Diagrams ; G ST

Dust Control Plan ; I C

1.3 CONTRACTOR'S STORAGE AND STAGING AREA

Storage and staging areas shall be at locations indicated or as otherwise approved by the Contracting Officer. The storage and staging areas may be used for activities such as setup of an office trailer, parking of private vehicles, storage of materials and equipment, and for work activities.

Security at the storage and staging site will be the Contractor's responsibility. Install temporary security fencing in a manner approved by the Contracting Officer. Security fencing shall not be installed in a manner that damages existing facilities, such as punching post holes in existing pavement.

1.4 CONTRACTOR WORK AREA AND ACCESS TO WORK AREA

1.4.1 Work and Storage Areas

a. Limited work, storage, and staging areas will be available within the Powerhouse. Temporary staging prior to lowering items through floor hatches will be available on the Generator floor area El. 287, on a case by case basis. Limited storage area is available on El. 235.5.

b. See drawings for additional information. Areas are subject to change. Coordinate additional work and storage area requirements with the Contracting Officer (KO). All other stairways, doorways, and floor drainage gutters shall remain open and accessible.

c. Temporary storage of equipment and materials in the Powerhouse shall be limited to those items required for performance of the work. The Government will not be responsible for providing security for stored equipment, supplies, and materials either inside or outside the powerhouse. Provide all necessary security.

d. Assume maximum load rating on concrete floors inside the Powerhouse structure is 400 lbs/sf (pounds per square foot), unless otherwise posted or noted. Avoid loading of gratings, drains, hatches, and related areas.

1.4.2 Access to Work Area

a. Access to work area for personnel will be from the lower parking lot on the Oregon side of the dam, through the personnel door on El. 287 to the Powerhouse interior.

b. Access for supplies and equipment needing to be moved through the different elevations of the Powerhouse will be through hatches located in floors El. 287.

c. Contractor may use the Government's powerhouse bridge crane to unload trucks, lower equipment through floor hatches, and to remove and install hatch covers. See SECTION 01 14 00.10 28 PROJECT SITE RESTRICTIONS, paragraph USE OF POWERHOUSE BRIDGE CRANE.

d. Whenever hatch covers are removed, install temporary guard railing around open hatches. Guard railing shall be in place around open hatches at all times. All guard railing shall conform to EM 385-1-1 .

e. Powerhouse deliveries will be on the South side of the Powerhouse, unless approved otherwise by the Contracting Officer. See Sheet G-103 for route and notes.

f. See SECTION 01 14 00.10 28 PROJECT SITE RESTRICTIONS for additional access information.

1.4.3 Use or Blockage of Powerhouse Main Door.

Coordinate all use and/or blockage of the Powerhouse Main Door with the KO, a minimum of 7 calendar days prior anticipated use/blockage.

1.5 GOVERNMENT ROADWAYS AND DECK ACCESS RESTRICTIONS

a. The roadway across McNary dam is not available for use by the

SECTION 01 55 10.00 28

public or the Contractor, to include vehicle turnarounds. Access across the Columbia River is over the interstate highway bridge located two miles downstream from the dam. Project access is only available from the Oregon (South) side tailrace deck.

b. Hauling of materials and equipment will be permitted on Project's roadways, bridges and decks. Submit transport loading diagrams indicating wheel loads and axle configurations for transport vehicles to haul loads exceeding HS-20, in accordance with AASHTO LRFD Bridge Design Specifications. ( AASHTO LRFD Bridge Design Specifications defines HS-20 vehicles as having a gross vehicle weight of 72,000 lbs.

and a maximum axle load of 32,000 lbs).

c. Approximate maximum load capacity on roadways on the dam structure is 1.2 times higher than HS-20 load. All transport vehicles exceeding HS-20 loads must have approved transport loading diagrams before accessing roadways over the dam. Protect the various portions of the Project's structures from damage by traffic, prevent material from falling through the deck openings, and also keep the areas in use cleaned up and orderly at all times during use. Vehicle speeds, special precautions, and safety measures shall be as directed by the Contracting Officer.

d. Maintain at least one way traffic at all times on the tailrace deck, except if temporary blockage of the tailrace deck is allowed by the Contracting Officer (KO) for short durations of time in order to load and unload materials and equipment. Coordinate complete blockages with the KO a minimum of 2 Government workdays in advance of anticipated blockage. See SECTION 01 14 00.10 28 PROJECT SITE RESTRICTIONS, paragraph "Government's Work Schedule" for additional information.

1.6 TRAFFIC CONTROL AND PUBLIC ACCESS

Existing public roads and access roads shall be kept open to vehicle traffic at all times. Conduct this work in such a manner as will obstruct and inconvenience traffic as little as possible. When necessary to operate on or cross existing highways or roads, furnish signs, lights, and/or other necessary safeguards to safely control and direct the flow of traffic. Obtain any and all required permits for such operations from the appropriate private or public authority at no additional cost to the Government.

1.6.1 Public Access Barriers

In areas where the public has access to the job site, construct temporary barriers around ongoing work with bright orange plastic fencing. The barrier shall be maintained until completion of the individual piece of work.

1.7 OVERHEAD BIRD EXCLUSION WIRES

a. Bird Exclusion Wires span from the Oregon fish pump entrance and Fish Ladder Entrance to the Navigation Lock, downstream guide wall.

Exclusion wires run north-south, and are spaced approximately 25-35 feet apart.

b. Wire elevations vary, but are at approximately EL 287 feet mean sea level (fmsl) at McNary. Wires may need to be removed to allow

Contractor access through the BRZ to the work area. Contractor shall remove and dispose of all wires required, in order to perform work on this Contract. Wires shall be replaced by others.

c. Wires are 1x7 stainless steel cable, 3/64" in diameter, with a breaking strength of 300 lbs.

d. Wires are in tension. Contractor shall take care in removal.

Contractor shall be responsible for all safety considerations and any damage caused during removal of Bird Exclusion Wires.

1.8 BOAT RESTRICTED ZONE POLICY (BRZ)

The Boat Restricted Zone (BRZ) Policy is attached at the end of this SECTION. Check with the Contracting Officer for BRZ policy updates prior to the Pre-Construction Meeting.

1.9 RADIO AND TELEPHONE COMMUNICATION

Furnish a radio on all Contractor watercraft, capable of transmitting and receiving on all frequencies, including 156.700 mHz (marine band channel 14 - primary channel) and 156.800 mHz (marine band channel 16 - backup channel). When needed, the McNary Project Powerhouse operator will communicate with the Contractor by radio on the marine band channels mentioned above. Furnish a list of supervisory personnel and their telephone numbers to be notified during non-working hours.

1.10 PERMITS AND RESPONSIBILITIES

Contractor shall be responsible for complying with all Federal, State, and municipal laws, codes, and regulations applicable to work on this contract. This includes obtaining all necessary licenses and permits related to transportation of equipment and/or contract items, and other areas of work on this contract, as applicable. Licenses and permits shall be obtained without additional expense to the Government.

1.11 DUST CONTROL PLAN

Dust control during dust generating activities is the responsibility of the Contractor. Submit a written Dust Control Plan detailing what will be done to prevent dust. Related information is located in the following specs. List may not be inclusive. The Dust Control plan shall reflect all requirements in these specifications:

a. SECTION 01 11 01.00 28 SUPPLEMENTARY REQUIREMENTS, paragraph AIR

PURITY CONTROL IN THE POWERHOUSE.

b. SECTION 03 30 70.00 28 CONCRETE DEMOLITION, REPAIR OF CONCRETE SURFACES, AND EQUIPMENT FOUNDATIONS, paragraph TEMPORARY BARRIER.

c. SECTION 05 05 20.00 28 POST-INSTALLED ANCHORS IN CONCRETE, paragraph DUST CONTROL.

1.12 HAULING MATERIAL

No material shall be allowed to drop off vehicles while in transit. The Contractor shall take all necessary precautions to prevent any material from dropping off the vehicle onto local roads.

1.13 FIRE CONTROL

Each piece of internal combustion engine driven equipment used at the work site shall be equipped with a fire extinguisher in accordance with National Fire Protection Association (NFPA) recommendations as appropriate. The minimum approved rating of extinguishers shall not be less than 5-B:C.

1.13.1 Fire Hazards

The Contractor shall eliminate all potential fire hazards that may result from their operations. This includes work on or near buildings, grounds, use of equipment, and the storage of supplies, fuels, or cleaning agents.

This also includes the removal of any accumulation of burnable or flammable materials or debris around chain-linked fences, signs, and other fixtures on the Project site.

PART 2 PRODUCTS (Not Used)

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SECTION TABLE OF CONTENTS

DIVISION 03 - CONCRETE

SECTION 03 30 70.00 28

CONCRETE DEMOLITION, REPAIR OF CONCRETE SURFACES, AND EQUIPMENT FOUNDATIONS

PART 1 GENERAL

1.1 GENERAL INFORMATION

1.2 REFERENCES

1.3 SUBMITTALS

1.4 CONCRETE REMOVAL LOCATIONS

PART 2 PRODUCTS

2.1 NON-SHRINK GROUT

2.2 EPOXY ADHESIVE GROUT

2.3 DRY PACKAGED CONCRETE

2.4 REINFORCING STEEL BAR

2.5 MORTAR FOR UNCONFINED CONCRETE REPAIR

PART 3 EXECUTION

3.1 GENERAL SAFETY

3.1.1 General

3.1.2 Electrical Hazards

3.2 GAS, VAPOR, FUME, DUST, SLURRY AND MIST CONTROL

3.3 TEMPORARY BARRIER

3.4 REMOVAL METHOD

3.4.1 General

3.4.2 Recommended Procedure

3.4.3 Saw Cutting

3.4.4 Core Drilling

3.4.5 Chipping

3.4.6 Exposed Reinforcement

3.4.7 Existing Concrete Strength

3.4.8 Existing Embedded Items

3.4.9 Concrete Cutting Tolerances

3.4.10 Finished Surface Tolerance

3.4.11 Quality Control

3.4.12 Disposal Of Waste Water And Concrete Debris

3.4.13 Repair Of Concrete Surfaces

3.5 EQUIPMENT FOUNDATIONS

3.5.1 Housekeeping Pad for Equipment Foundation

3.5.2 Concrete Placement

3.5.3 Concrete Slabs

3.5.4 Concrete Curing

3.5.5 Grout Pads

3.6 SUMP INVESTIGATION

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SECTION 03 30 70.00 28

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SECTION 03 30 70.00 28

SECTION 03 30 70.00 28

CONCRETE DEMOLITION, REPAIR OF CONCRETE SURFACES, AND EQUIPMENT FOUNDATIONS

PART 1 GENERAL

1.1 GENERAL INFORMATION

The work covered by this section consists of furnishing all material, labor, and equipment, and performing all work required for the removal of concrete, core drilling, the restoration of the concrete surfaces to the required lines and grades, and placement of equipment foundations in required locations. The Contractor shall provide protection from concrete dust and water damage to existing and new equipment. The Contractor shall take effective measures to control gas, vapor, fumes, dust, slurry and mist during concrete removal operations.

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 basic designation only.

AMERICAN CONCRETE INSTITUTE (ACI)

ACI 318 (2014; Errata 1-2 2014; Errata 3-5 2015;

Errata 6 2016; Errata 7-9 2017) Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14)

ASTM INTERNATIONAL (ASTM)

ASTM A185/A185M (2007) Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete

ASTM A615/A615M (2016) Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ASTM C387/C387M (2017) Standard Specification for Packaged, Dry, Combined Materials for Concrete and High Strength Mortar

ASTM C881/C881M (2015) Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete

ASTM C1107/C1107M (2017) Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Nonshrink)

ASTM C309 (2011) Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

ASTM C928/C928M (2013) Packaged, Dry, Rapid-Hardening

Cementitious Materials for Concrete Repairs

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 Safety and Health Requirements Manual

The Contractor shall be responsible for complying with the current edition and all changes posted on the web as of the effective date of this solicitation.

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910 Occupational Safety and Health Standards

29 CFR 1910.1000 Air Contaminants

29 CFR 1910.94 Ventilation

29 CFR 1926 Safety and Health Regulations for Construction

29 CFR 1926.55 Gases, Vapors, Fumes, Dusts, and Mists

29 CFR 1926.57 Ventilation

29 CFR 1926.58 Safety and Health Regulations for Construction

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

Concrete Removal and Disposal Plan ; I, ST

Core Drilling Procedure ; I, ST

Concrete Imaging Report ; I, ST

Grout Pads ; I, ST

SD-03 Product Data

Non-shrink grout ; I, ST

Epoxy Adhesive Grout ; I, ST

Dry Packaged Concrete ; I, ST

Mortar ; G, ST

Reinforcing Steel Bar ; I, ST

Skim Coat ; G, ST

SD-06 Test Reports

Sump Investigation ; I, ST

1.4 CONCRETE REMOVAL LOCATIONS

Remove concrete as required in the contract. .

PART 2 PRODUCTS

2.1 NON-SHRINK GROUT

Non-shrink grout shall be inorganic, non-metallic, non-gas-liberating cement-based grout meeting all requirements of ASTM C1107/C1107M ; shall have a minimum 28-day compressive strength of 5000 psi; and shall have no shrinkage (0.0 percent) and a maximum 2.0 percent expansion in the hardenedstate. Manufacturer's data shall be submitted for review 30 days before anticipated use. When submitting the product data, indicate what application it will be used for and anticipated thickness.

2.2 EPOXY ADHESIVE GROUT

Epoxy Adhesive Grout shall be two part epoxy adhesive meeting all requirements of ASTM C881/C881M. Manufacturer's data shall be submitted for review 30 days before anticipated use. When submitting the product data, indicate what application it will be used for and anticipated thickness.

2.3 DRY PACKAGED CONCRETE

Dry Packaged Concrete shall conform to ASTM C387/C387M, normal weight, normal strength. Minimum compressive strength f'c shall be 3000 psi at 28 days. Each bag of concrete shall have factory printing indicating the ASTMdesignation, weight, and strength. Bags shall be stored off the ground andcovered to protect from getting wet. Concrete shall be mixed with electricmotor operated portable mixer. Potable water shall be used for mixing the concrete. When submitting the product data, indicate what application it will be used for and anticipated thickness.

2.4 REINFORCING STEEL BAR

Reinforcing Steel Bar shall conform to the requirements of ASTM A615/A615M , Grade 60. Welded steel wire fabric shall conform to the requirements of ASTM A185/A185M . Details of reinforcement not shown shall be in accordance with ACI 318 , Chapters 7 and 12.

2.5 MORTAR FOR UNCONFINED CONCRETE REPAIR

Mortar shall be a commercially available prepackaged material consisting of a formulation suitable for the application proposed and meeting the requirements for ASTM C928/C928M. The use of metallic iron in the mortar will not be acceptable. Mortar shall have a minimum 7-day compressive strength of 5000 psi. When submitting the product data, indicate what application it will be used for and anticipated thickness.

PART 3 EXECUTION

3.1 GENERAL SAFETY

3.1.1 General

All site work shall be accomplished in compliance with EM 385-1-1 , 29 CFR 1910 and 29 CFR 1926 as applicable.

3.1.2 Electrical Hazards

The work areas may be in proximity of energized electrical equipment.

Contractor is required to formally train and document safety training for all workers required to work in this area. Spray over onto live equipment is hazardous to workers and equipment and shall not be permitted. Signed safety training sheets will be required to be turned into Contracting Officer to document worker safety training.

3.2 GAS, VAPOR, FUME, DUST, SLURRY AND MIST CONTROL

All necessary measures shall be taken to effect maximum control of all gases, vapors, fumes, dust, slurry and mists created by Contractor operations under this contract. To the maximum extent possible, all dust and dirt shall be removed by vacuum cleaning and mopping, unless otherwise directed by the Contracting Officer. The required concrete removal and disposal plan shall include the following:

a. Provision of exhaust ducts which shall discharge outside the structure where mechanical ventilation is used. Ventilation systems shall comply with requirements of 29 CFR 1910.94 and 29 CFR 1926.57 .

b. Controlled operation of power-driven tools.

c. Furnishing and removing of approved dust preventatives in areas which cannot be properly rendered free from excessive dusting by vacuum cleaning and mopping or other methods.

d. Vacuum cleaning and mopping (or other acceptable method) of spaces inside the structure where dust accumulates.

e. Only air, electrical, propane, or battery-driven equipment may be used inside the structure.

f. The powerhouse is pressurized to prevent dust infiltration from the outside. All doors shall be kept closed when not being used.

g. Blocking doors for extended periods shall not be permitted unless agreed upon in writing by the Contracting Officer (C.O.).

h. Methods to prevent exposure of employees to inhalation, ingestion, skin absorption, or contact with any material or substance at concentrations above those specified in 29 CFR 1910.1000 , 29 CFR 1926.55 and 29 CFR 1926.58 .

3.3 TEMPORARY BARRIER

Temporary barriers for the control of dust and debris shall be constructed as required to control dust and debris and meeting criteria outlined in EM 385-1-1 . The design of the barriers shall be submitted for approval, as part of the Concrete Removal and Disposal Plan.

3.4 REMOVAL METHOD

3.4.1 General

Concrete shall be removed in a manner that will not fracture the surrounding concrete. Maintain a safety ground from the ground system to the frame of the concrete cutting tool during cutting operations to avoid electrical shock hazards. Reinforced concrete removal shall result in flush, level smooth surface at the lines shown on the drawings. Care shall be taken not to damage existing reinforcing bar. Explosive or chemical demolition will not be allowed. Adequate equipment shall be provided to remove the pieces of concrete safely and without damage to the surrounding structure. Slurry or tailings generated from sawing or drilling operations shall be confined to the immediate area, and disposed of by vacuuming and mopping. If during any cutting or core drilling activity copper tailings are produced, the Contractor shall report such findings in writing to the C.O. Additional dust control measures shall be implemented per paragraph "GAS, VAPOR, FUME, DUST, SLURRY AND MIST CONTROL". A written concrete removal and disposal plan shall be submitted 60 days prior to commencement of concrete work, showing equipment to be used, include a waste water collection plan as specified in 01 57 20.00 28 ENVIRONMENTAL PROTECTION, expected noise levels and duration. All concrete removed shall become the property of the Contractor and shall be disposed of in accordance with applicable regulations.

3.4.2 Recommended Procedure

Saw cutting, core-drilling, wire cutting or any combination thereof is the recommended method for the concrete removal to be done as part of this contract. In addition to cutting, chipping or grinding may be used to bring the concrete profile to the final finished grade. When the portion of concrete to be removed is of such a magnitude that it cannot be extracted in a single piece, additional cutting shall be performed to allowthe concrete to be removed in several convenient sized sections.

3.4.3 Saw Cutting

Saw cutting shall be performed at the locations shown on the contract drawings. The saw cuts shall be done using a diamond-bladed saw. Saw cuts shall be straight and uniform. Scan concrete for embedded items before cutting. If electrical items are found contact the KO.

3.4.4 Core Drilling

Prior to core drilling the Contractor…