RA-1b RWSA Bid Form

Rivanna Water and Sewer Authority

REQUEST FOR QUOTE NO. 1135

Stone Robinson Water Resource Recovery Facility Tank Repair and Rehabilitation

DATE: April 21, 2026

PROJECT TITLE: Stone Robinson Water Resource Recovery Facility Tank Repair and

Rehabilitation

Purpose

The Rivanna Water & Sewer Authority (the “Authority”) is seeking quotes to repair and rehabilitate the existing water resource recovery facility tankage.

Scope and Construction Notes

1. Scope of work includes temporary pumping and hauling of wastewater, removal of existing process equipment from the water resource recovery facility (WRRF), sand blasting of interior metal surfaces and exterior surfaces extending 6” below grade, installation of metal fabrications for deteriorated steel of interior walls, coatings installation for interior walls, re-installation of existing process equipment as originally shown, 7-day operational performance review of existing process equipment, reestablishment of wastewater flow throughout the facility, restoration work and all associated project work.

2. The Contractor shall provide temporary wastewater pumping and hauling during the duration that the WRRF is offline. The Contractor shall submit a temporary pumping and hauling plan for review and comment at least 15 Working Days prior to the WRRF being taken offline for this work to begin. Refer to section 01 12 16 - Work Sequence

3. Contractor is responsible for secure and proper storage of all existing process equipment that is removed to prevent damage or weathering of the equipment. Any process equipment that is damaged shall be replaced as new by the Contractor.

4. The Contractor shall notify the Authority once all existing process equipment has been removed.

5. Once repair and rehabilitation have been completed and prior to wastewater flow reestablished to the WRRF, all existing process equipment removed shall be reinstalled as originally shown. The existing process equipment shall operate without the need for operator intervention for a minimum of 7 continuous days to be considered operational.

Wastewater flow shall not be reestablished until the Authority reviews the reinstalled equipment and the existing process equipment is considered operational.

6. Work to be performed shall be inclusive of any labor, equipment, and materials necessary to remove existing process equipment and reinstall equipment once rehabilitation work is completed.

7. Metal fabrications shall be installed to repair deteriorated steel of interior walls as indicated and as determined following sandblasting of the tank. Refence section 05 50 00

- Metal Fabrications.

8. Coatings shall be installed throughout entirety of interior surfaces and exterior surfaces

RA-1b RWSA Bid Form extending 6” below grade of the water resource recovery facility once sand blasting and metal repairs are completed. Reference section 09 97 20 - Coating Systems for

Wastewater Facilities.

9. Restoration of any damaged process equipment, electrical instrumentation, disturbed pavement, lawns, grass, or other existing features shall be incidental to the pricing provided in the quote. All property disturbed or damaged shall be restored to pre-existing conditions at no additional cost to the Authority. All process equipment or electrical instrumentation disturbed or damaged shall be replaced as new.

10. Substantial Completion shall be achieved by July 15th, 2026. Substantial Completion is defined as having finished the work and submitted all acceptance testing to RWSA, as well as having completed all restoration work at the project site.

11. Regular allowable work hours for this project shall be from 8 AM – 5 PM, Monday –

Friday, unless otherwise authorized in writing by the Owner and Engineer. Work on weekends and Authority holidays will not be permitted for this project unless otherwise authorized in writing by the Owner and Engineer. It is expected given the short project time frame that night and weekend work may be necessary and authorization shall not be unreasonably withheld.

12. If awarded, Contractor will be issued a purchase order for the work (Attachment C).

13. If awarded, Contractor shall provide proof of adequate insurance (Attachment D).

14. If awarded, Contractor shall participate in a Safety Meeting with the Owner’s Safety

Manager. The checklist provided (Section 01 80 00) shall be completed and submitted to

Owner for review at least 3 business days prior to the meeting. Please note that both the

Contractor Company Safety Representative, and the Contractor On-Site Safety

Representative, must have an OSHA 10 Certification at a minimum. The On-Site Safety

Representative may have another role in the crew (i.e. – Superintendent, Foreman, etc.), but must be on site at all times during the work.

All technical questions and requests for site visit assistance, may be directed to Dyon

Vega at (434) 977-2970 ext. 170 or dvega@rivanna.org. All quotes shall be submitted and signed by an authorized agent of the company.

All quotes are due by 3:00 PM local prevailing time on May 11th, 2026. Quotes received after this deadline will not be considered. Quotes may be mailed, or hand delivered, e-mailed, or submitted on the eVA Procurement Website, https://eva.virginia.gov/. Quotes shall be submitted to:

Administration – Procurement

Rivanna Water and Sewer Authority

695 Moores Creek Lane

Charlottesville, Va 22902 mbaird@rivanna.org

Attachment A – Plans & Specifications

Attachment B – Quote Form

Attachment C – General Purchase Order Provisions

Attachment D – Supplementary Provisions to the General Purchase Order Provisions

Attachment E – Section 01 80 00 Safety Requirements

STONE ROBINSON

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SITE LOCATION

ACCESS DRIVE

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INSTALL TEMPORARY PUMP

AT EXSITING SANITARY MH

(SEE TEMPORARY PUMPING

NOTES THIS SHEET)

TEMPORARY WASTEWATER

STORAGE

(APPROXIMATE LOCATION)

(SEE TEMPORARY PUMPING

NOTES THIS SHEET)

SEH Project Checked By Drawn By

Project Status Issue Date

This drawing is an instrument of service and shall remain the property of Short Elliott Hendrickson, Inc.

(SEH). This drawing, concepts and ideas contained herein shall not be used, reproduced, revised, or retained without the express written approval of SEH.

Submission or distribution of this drawing to meet official or regulatory requirements or for purposes in connection with the project is not be construed as publication in derogation of any of the rights of SEH.

Project Owner

Sh or t E llio tt H en dr ick so n, Inc

Al l R igh ts

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CO

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REVISION SCHEDULE

REV. # DESCRIPTION DATE

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RIVAN 190497

WSW

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Rivanna Water & Sewer Authority 695 Moores Creek Lane Charlottesville, VA 22902

04/10/2026

BID DOCUMENTS 04/13/2026

C101

SITE LOCATION MAP

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50 10050

EXISTING WWTP SITE SITE LOCATION

SCALE: 1" = 50'

NOTES:

1. CONTRACTOR SHALL FIELD VERIFY ALL EXISTING

CONDITIONS PRIOR TO CONSTRUCTION.

2. LOCATIONS ARE BASED ON INFORMATION FROM

AS-BUILTS ENTITLED "PURESTREAM PREFABRICATED

STEEL SEWAGE TREATMENT PLANT",

DATED 10/21/1987.

TEMPORARY PUMPING NOTES:

1. OUTLET OF EXISTING SANITARY MH TO BE PLUGGED

USING REMOVABLE PLUG AND TEMPORARY PUMPING

TO BE INSTALLED TO CONVEY WASTEWATER TO

TEMPORARY HOLDINGS TANK. SEE SPECIFICATION.

2. TEMPORARY WASTEWATER HOLDING TANK SHOWN IN

APPROXIMATE LOCATION ON DRAWINGS.

CONTRACTOR SHALL COORDINATE LOCATION AND

DELIVERY WITH RIVANNA WATER & SEWER AUTHORITY

PRIOR TO DELIVERY. CONTRACTOR SHALL BE

RESPONSIBLE FOR DELIVERY AND REMOVAL OF TANK

AS WELL AS ALL REMOVAL OF WASTEWATER WHILE IT

IS IN PLACE. SEE SPECIFICATION.

A

S102

S102

2 3 4 5 6 7

B

7'-3" 2'-0" 13'-6" 5'-6" 3'-0" 3'-0"

'-0

PLAN

NORTH

EXISTING

CONCRETE

PAD

EXISTING

STEEL WALL

EXISTING

STEEL WALL

EXISTING

STEEL WALL

S102

S102

S102

S102

S102

S102

A

S102

S102

2 3 4 5 6 7

B

7'-3" 2'-0" 13'-6" 5'-6" 3'-0" 3'-0"

'-0

EXISTING GRATING

- NOTE 7

PLAN

NORTH

S102

S102

S102

S102

S102

S102

1. CONTRACTOR TO FIELD VERIFY EXISTING CONDITIONS BEFORE STEEL INSTALL. CONTRACTOR SHALL

COORDINATE A MEETING WITH ENGINEER TO REVIEW CONDITIONS IN THE FIELD.

2. (E) = EXISTING

3. TOP OF TANK = 100'-0" (ASSUMED)

4. CLEAN CELL WALLS BEFORE REPAIR WELDING BEGINS TO SSPC-SP11 LEVEL.

5. SEE SPECIFICATIONS FOR COATING APPLIED TO STEEL.

6. SEE PROCESS FOR SITE LOCATION.

7. REMOVE AND RESET EXISTING GRATING AND GRATING SUPPORT STRUCTURE ON REPAIRED TANK BETWEEN

GRID 5 AND 6, THEN LOAD TEST TO 100 PSF.

8. THE TOP OF TANK IS NOT RATED FOR VEHICLE LOADING.

9. DETAIL CALLOUT LOCATIONS TO BE FIELD VERIFIED.

GENERAL NOTES:

(TYPICAL UNLESS NOTED OTHERWISE)

R

SEH Project

Checked By

Drawn By

Project Status Issue Date

This drawing is an instrument of service and shall remain the property of Short Elliott Hendrickson, Inc.

(SEH). This drawing, concepts and ideas contained herein shall not be used, reproduced, revised, or retained without the express written approval of SEH.

Submission or distribution of this drawing to meet official or regulatory requirements or for purposes in connection with the project is not to be construed as publication in derogation of any of the rights of SEH.

Project Owner

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Rivanna Water & Sewer Authority 695 Moores Creek Lane Charlottesville, VA 22902

4/ 9/

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P M

GENERAL STRUCTURAL

NOTES, FOUNDATION & TOP

OF TANK PLAN

S T

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RIVAN 190497

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BID DOCUMENTS 04/13/2026

S101

GENERAL STRUCTURAL NOTES

1. These notes detail requirements for the design represented in these documents and are to be read in conjunction with the specifications.

Any discrepancies or conflicts between the two shall be brought to the attention of the Structural Engineer of Record (SER) for resolution.

In these Notes and the Specifications, the word “shall” means “has a duty to.”

2. These drawings are for Stone Robbinson Tank Repairs 2026 (RIVAN 190497) and no other use is authorized.

GOVERNING BUILDING CODE:

2021 Virginia Uniform Statewide Building Code 2021 International Building Code as adopted and amended by the state building code

DESIGN CODES AND STANDARDS:

All codes adopted by reference in IBC Chapter 35

DESIGN LOADS PER ASCE 7-22

Risk category III

1. Snow loads:

Ground snow load 59 PSF Importance factor 1.10

2. Seismic loads:

Site class D Ss 0.024 g S1 0.061 g Sms 0.28 Sm1 0.13 Sds 0.19 g Sd1 0.086 g

VS30 260

Seismic design category B

DESIGN / CONSTRUCTION CRITERIA

1. The contractor shall verify dimensions and conditions before construction and notify the engineer of any discrepancies, inconsistencies, or difficulties affecting the work before proceeding.

2. All material, workmanship, and details shall be in accordance with typical competent construction practices, current manufacturer’s recommendations, and all applicable codes and government regulations.

3. The contractor shall coordinate all disciplines, verifying size and location of all openings, whether shown on structural drawings or not, as called for on process or other drawings. All conflicts, inconsistencies, or other difficulties affecting structural work shall be called to the architect and engineer's attention for direction before proceeding.

4. Equipment and structural anchor rod sizes, types, embedment, and patterns shall be verified with the manufacturer or fabricator. All anchor patterns shall be templated to ensure accuracy of placement.

5. The contractor shall supply all necessary temporary bracing, shoring, guying, or other means to avoid excessive stresses and to hold structural elements in place during construction.

6. Job site safety (including excavations) is the sole responsibility of the general contractor and their subcontractors.

7. The engineer is not responsible for construction means, methods, techniques or practices. Where drawings and details imply this, they are provided to show final construction. If contractor desires to use different means and methods than implied by these drawings, submit similar details for review.

8. There is no provision for future vertical or horizontal expansion in the design.

EXISTING CONSTRUCTION

1. Before proceeding with any work within the existing facility, the contractor shall familiarize themself with existing structural and other conditions. It shall be the contractor's responsibility to design, provide, and erect all necessary bracing, shoring and other safeguards to maintain all parts of the existing work in a safe condition during the process of demolition and construction and to protect from damage those portions of the existing work which are to remain.

2. The contractor shall field verify the dimensions, elevations, etc. necessary for the proper construction and alignment of the new portions of the work to the existing work. The contractor shall make all measurements necessary for fabrication and erection of structural members.

Any discrepancy shall be immediately brought to the attention of the engineer.

3. Any existing construction damaged in the removal of adjacent elements shall be replaced at the contractor's expense.

4. Where existing concrete elements are to be demolished and reinforcing is not required to remain, cut existing reinforcing flush with concrete to remain and coat with epoxy, unless covered with concrete in final construction.

STRUCTURAL METALS

1. All structural steel shall be as follows:

• All miscellaneous steel (angles, channels, plate) shall be ASTM A992, A529, or A36 steel (min. Fy = 36 KSI).

• Rectangular steel tubes (HSS) shall be ASTM A500, grade C steel (fy = 50 KSI).

• Other shapes shall be ASTM A36 (36 KSI).

2. Splicing or modification of members in the field is prohibited without prior written approval of the SER.

3. Fabrication and erection shall be in accordance with the latest edition of the AISC Manual of Steel Construction, Code of Standard Practice for Steel Buildings and Bridges, except as follows:

• Delete paragraph 3.2 and insert the following: "architectural, process, electrical and mechanical plans shall be used as a supplement to the structural steel design drawings to define detail configurations and construction information”.

• Paragraph 3.3 modify the last sentence to read, "in case of discrepancies between the structural steel plans and plans of other disciplines or existing conditions, such discrepancies shall be called to the architect / engineer's attention for resolution”.

4. All steel welding shall be performed by a certified welder using E70 electrodes in accordance with the requirements of AWS D1.1

"Structural Welding Code" and visually inspected. Full-pen welds shall also be inspected by NDT methods such as ultrasonic, mag particle, or dye pen.

5. All field welded connections shall be chipped, ground where required, blast cleaned (SSPC-SP-11) and painted to match the paint system.

STEEL FINISHES

1. All steel shall receive a two layer coating system: see specifications.

SHOP DRAWING REVIEW

1. Short Elliott Hendrickson Inc. (SEH) will review the general contractor's (GC) shop drawings and related submittals (as indicated below) with respect to the ability of the detailed work, when complete, to be a properly functioning integral element of the overall structural system designed by SEH. In general, submittals will not be reviewed for correct quantities or construction considerations. SEH shall review shop drawings and related materials with comments provided that each submission has met the requirements herein. SEH shall return without comment unrequired material or submissions without GC approval stamp.

2. Prior to submittal of a shop drawing or any related material to SEH, the GC shall:

• Review each submission for conformance with the means, methods, techniques, sequences and operations of construction and safety precautions and programs incidental thereto, all of which are the sole responsibility of the GC.

• Review and approve each submission.

• Stamp each submission as approved.

3. SEH shall assume that no submission comprises a variation from the contract documents unless the GC advises SEH with written documentation. Should SEH require more than ten (10) working days to perform the review, SEH shall so notify the GC. Submittals shall include drawings and related material (if any) as indicated below.

• Structural steel and metal fabrication shop drawings including erection drawings and piece details.

• It is assumed that all welding onsite will be performed by AWS certified welders.

4' 8'2'0 1/4" = 1'-0"S101

1 FOUNDATION PLAN

4' 8'2'0 1/4" = 1'-0"S101

2 TOP OF TANK PLAN

REVISION SCHEDULE

REV. # DESCRIPTION DATE

JOEL ERIC RECTOR

Lic. No. 0402068329

HTL A OE F W VN IRO GM INM IAO

C

PROFESSIONAL ENGIN

EE

R

04/10/2026

(E) TOP OF TANK

100.00

(E) TOP OF TANK

100.00

(E) BASE SLAB

89.00

(E) BASE SLAB

89.00

1 2 3 4 5 6 7

7'-3" 2'-0" 13'-6" 5'-6" 3'-0" 3'-0"

SURGE TANK SHT

TANK

AERATION TANK CLARIFIER

'-0

S102

S102

S102

_______________ 2

S102

S102

NOTE:

DETAIL CALLOUT LOCATIONS TO BE FIELD VERIFIED.

S102

EXISTING TANK WALL - SEE PLAN

STEEL PL 5/16" THICK X 9" TALL X 2'-0"

FIELD VERIFY SIZE AND LOCATIONS

GC NOTE: FIELD VERIFY SIZE OF

PLATES AT EACH LOCATION.

NOTIFY ENGINEER IF SECTION

LOSS IS LARGER THAN 9" IN THE

SHORTEST DIRECTION.

FOR BIDDING ASSUME 3

LOCATIONS PER DETAIL CUT.

PROVIDE UNIT PRICING FOR

ADDITIONAL LOCATIONS

1/4

TYP

1/ 4"

1/ 4"

BACKING ROD

NOTE:

CUT EDGES OF HOLE TO SQUARE OFF

FOR PLATE INSTALL. REMOVE BACK

ROD IN FINAL CONDITION (PRIOR TO

APPLYING COATING).

EXISTING TANK WALL - SEE PLAN

PL 3/8" X 14" X 2'-8"

(FIELD VERIFY LENGTH) 9"

M A

X 2"

M

IN

GC NOTE: FIELD VERIFY SIZE OF

PLATES AT EACH LOCATION.

NOTIFY ENGINEER IF SECTION

LOSS IS LARGER THAN 9" IN THE

SHORTEST DIRECTION.

FOR BIDDING ASSUME 3

LOCATIONS PER DETAIL CUT.

PROVIDE UNIT PRICING FOR

ADDITIONAL LOCATIONS

3/16

TYP

3/16

TYP

INTERIOR

EXISTING TANK WALL - SEE PLAN

PL 1/4" X 14" X 2'-0"

(FIELD VERIFY LENGTH)

GC NOTE: FIELD VERIFY SIZE OF

PLATES AT EACH LOCATION.

FOR BIDDING ASSUME 3

LOCATIONS PER DETAIL CUT.

PROVIDE UNIT PRICING FOR

ADDITIONAL LOCATIONS

3/16

TYP

2" M

IN

5/16" BENT PLATE X 2'-8" FIELD VERIFY LENGTH

FIT TIGHT TO EXISTING WALL

DEMO DETERIORATED TOP

STEEL MEMBER TO PROVIDE A

FLAT ELEVATION FOR INSTALL.

FOR BIDDING ASSUME 3

LOCATIONS PER DETAIL CUT.

PROVIDE UNIT PRICING FOR

ADDITIONAL LOCATIONS

3/16

6"

F

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IF

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1' -4

6"

2"

EXCAVATE AT EXTERIOR AS

NEEDED TO MAKE WELDS

REPLACE EXISTING SCREWS

INTO NEW STEEL

REUSE EXISTING COVER

R

SEH Project

Checked By

Drawn By

Project Status Issue Date

This drawing is an instrument of service and shall remain the property of Short Elliott Hendrickson, Inc.

(SEH). This drawing, concepts and ideas contained herein shall not be used, reproduced, revised, or retained without the express written approval of SEH.

Submission or distribution of this drawing to meet official or regulatory requirements or for purposes in connection with the project is not to be construed as publication in derogation of any of the rights of SEH.

Project Owner

S ho rt E lli ot t H en dr ic ks on

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Rivanna Water & Sewer Authority 695 Moores Creek Lane Charlottesville, VA 22902

4/ 9/

:4

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P M

SECTION & DETALS

S T

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BID DOCUMENTS 04/13/2026

S102

4' 8'2'0 1/4" = 1'-0"S102

1 SECTION

NOT TO SCALES102

2 STEEL REPAIR FOR MISSING MATERIAL - INTERIOR WALL

NOT TO SCALES102

3 STEEL REPAIR FOR MISSING MATERIAL - EXTERIOR WALL

NOT TO SCALES102

4 STEEL REPAIR - LESS THAN 0.2 IN WALL THICK WITHOUT HOLES

NOT TO SCALES102

5 STEEL REPAIR - TOP OF TANK

REVISION SCHEDULE

REV. # DESCRIPTION DATE

JOEL ERIC RECTOR

Lic. No. 0402068329

HTL A OE F W VN IRO GM INM IAO

C

PROFESSIONAL ENGIN

EE

04/10/2026

EXISTING

RAS/WAS TROUGH

EXISTING

SKIMMER

RETURN LINE

EXISTING

SUPERNATANT

LINE

CONFIRM INTEGRITY OF

EXISTING EMERGENCY

OVERFLOW TROUGH.

SEE STRUCTURAL SHEET S102.

REMOVE & REINSTALL BOTH

EXISTING DUPLEX SUBMERSIBLE

PUMPS, PUMP MOUNTS, PUMP

LIFTING SYSTEMS & ELECTRICAL

APPURTENANCES

(TYP OF 2)

EXISTING 6"

INLET W/ 12"

GROUT RING

REMOVE & REINSTALL EXISTING CONTROL

PANEL. ALL ELECTRICAL WIRING SHALL BE

DISCONNECTED & MOVED AWAY FROM

CONSTRUCTION FOR PROTECTION.

REMOVE & REINSTALL ALL TANK GRATING.

SAFETY MEASURES SHALL BE IN PLACE

WHEN GRATING IS REMOVED.

EXISTING

SLUDGE

RETURN

LINE

EXISTING

HOOK GAUGE

EXISTING BAFFLE

(TYP)

EXISTING SOLENOID VALVE

SECTION1

P101

SECTION3

P101

SEH Project Checked By Drawn By

Project Status Issue Date

This drawing is an instrument of service and shall remain the property of Short Elliott Hendrickson, Inc.

(SEH). This drawing, concepts and ideas contained herein shall not be used, reproduced, revised, or retained without the express written approval of SEH.

Submission or distribution of this drawing to meet official or regulatory requirements or for purposes in connection with the project is not be construed as publication in derogation of any of the rights of SEH.

Project Owner

Sh or t E llio tt H en dr ick so n, Inc

Al l R igh ts

Re se rve d

CO

PY

RI

GH

T

REVISION SCHEDULE

REV. # DESCRIPTION DATE

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RIVAN 190497

WSW

CB

Rivanna Water & Sewer Authority 695 Moores Creek Lane Charlottesville, VA 22902

04/10/2026

BID DOCUMENTS 04/13/2026

EXISTING AIRLIFT PUMP

EXISTING AIRLINES & CONTROL

VALVES FOR SLUDGE RETURN

PUMPS/SKIMMER PUMPS

SURGE SHT AERATION CLARIFIER

EXISTING

END WALL

REINFORCEMENT

EXISTING

END WALL

REINFORCEMENT

DECHLORINATION

EXISTING ADJUSTMENT EFFLUENT WEIR TROUGH

EXISTING CHLORINATOR

EXISTING

22.5° V-NOTCH

3'-0"

2' -1

0" 2'

-8

6"

12"

13'-6"2'-0"7'-3" 5'-6" 3'-0" 3'-0"

EXISTING UPPER TANK

SECTION HORIZONTAL

REINFORCEMENT

BOX BEAM

(TYP)

EXISTING

WEATHER PROOF

BLOWER/HOUSING

EXISTING AERATION

CHAMBER OUTLET

BAFFLE

EXISTING 6" DIA OUTLET

12" GROUT RING

10'-0"

12"11.5" EXISTING MAIN

AIR HEADER

WL

EXISTING

STRUCTURAL

REINFORCEMENT

EXISTING

DIFFUSER

ASSEMBLY

16" 16"

EXISTING FOUNDATION PAD

18"

1' -6

EXISTING

2" DRAINS

6"

EXISTING

WEATHER PROOF

CONTROL PANEL

EXISTING BLOWER

MOTOR UNIT

EXISTING

AIR SLUDGE

RETURN PUMP

EXISTING

SKIMMER

EXISTING

12" X 12" INLET

TO CLARIFIER

EXISTING

FROTH CONTROL

SYSTEM

(OPTIONAL)

EXISTING

EYEBOLT LT/HOOK

& TURNBUCKLE

PLAN

NOT TO SCALE

SECTION2

P101

P101

SECTION & DETAILS12"

'-0

10'-0"

'-0

'-0

Sa ve

: 4 /10

/20

5:

P M sw illi by P lot : 4

/15 /20

3:

P

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\P T\

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\51 -d ra wi ng s\1

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NOTES:

1. CONTRACTOR SHALL FIELD VERIFY ALL EXISTING CONDITIONS PRIOR

TO CONSTRUCTION.

2. LOCATIONS ARE BASED ON INFORMATION FROM AS-BUILTS ENTITLED

"PURESTREAM PREFABRICATED STEEL SEWAGE TREATMENT PLANT",

DATED 10/21/1987.

3. CONTRACTOR SHALL REFERENCE SECTION 01 12 16 WORK SEQUENCE FOR

CONSTRUCTION SEQUENCING PROCEDURES PRIOR TO CONSTRUCTION.

4. CONTRACTOR SHALL INFORM RIVANNA WATER AND SEWER AUTHORITY

ONCE ALL EQUIPMENT IS REMOVED FROM THE TANKS. ANY EQUIPMENT

SHOWN TO BE DAMAGED OR NOT IN WORKING CONDITION SHALL BE

SHOWN TO THE OWNER.

5. CONTRACTOR SHALL REMOVE AND REPLACE ANY MATERIALS SHOWN TO

BE DAMAGED AFTER SAND BLASTING PROCEDURES ARE COMPLETED.

REVIEW DAMAGED AREAS WITH ENGINEER AND OWNER.

6. CONTRACTOR SHALL PROTECT ALL ELECTRICAL GEAR THROUGHOUT

PROJECT.

CONFIRM INTEGRITY OF EXISTING SUPERNATANT

PIPING. AIRLIFT PUMP PIPING & WAS/RAS

TROUGH WITHIN SHT TANK.

REMOVE & REINSTALL ALL EXISTING

DECHLORINATION EQUIPMENT.

REMOVE & REINSTALL EXISTING

LEVEL MEASUREMENT DEVICE

& ELECTRICAL CONDUIT.

CONFIRM INTEGRITY OF BOTH EXISTING BAFFLES

& REPORT TO THE OWNER & ENGINEER.

CHLORINATION

REMOVE & REINSTALL ALL EXISTING

DECHLORINATION EQUIPMENT.

REMOVE & REINSTALL CONTROL PANEL.

ALL ELECTRICAL WIRING SHALL BE

DISCONNECTED & MOVED AWAY FROM

CONSTRUCTION FOR PROTECTION.

REMOVE & REINSTALL BOTH EXISTING

BLOWERS, BLOWER DISCHARGE PIPING

& ELECTRICAL WIRING/CONDUIT

REMOVE & REINSTALL EXISTING CONTROL

PANEL. ALL ELECTRICAL WIRING SHALL BE

DISCONNECTED & MOVED AWAY FROM

CONSTRUCTION FOR PROTECTION.

REMOVE & REINSTALL BOTH EXISTING

BLOWERS, BLOWER DISCHARGE PIPING

& ELECTRICAL WIRING/CONDUIT

CONFIRM INTEGRITY

OF EXISTING

SUPERNATANT

PIPING.

REMOVE & REINSTALL EXISTING AERATION

DIFFUSER GRIDS, AERATION PIPING &

ACCESSORIES THROUGHOUT TANKS.

(TYP)

REMOVE & REINSTALL BOTH

EXISTING DUPLEX SUBMERSIBLE

PUMPS. PUMP MOUNT, PUMP

LIFTING SYSTEM & ELECTRICAL

APPURTENANCES.

(TYP OF 2)

CONFIRM INTEGRITY OF EXISTING

SUPERNATANT PIPING. AIRLIFT

PUMP PIPING & WAS/RAS TROUGH

WITHIN SHT TANK.

REMOVE & REINSTALL BOTH EXISTING

BLOWERS, BLOWER DISCHARGE PIPING

& ELECTRICAL WIRING/CONDUIT

REMOVE & REINSTALL EXISTING

AERATION DIFFUSER GRIDS,

AERATION PIPING & ACCESSORIES

THROUGHOUT TANKS.

(TYP)

CONFIRM INTEGRITY OF EXISTING

PUMP DISCHARGE PIPING.

REMOVE & REINSTALL BOTH EXISTING

BLOWERS, BLOWER DISCHARGE PIPING

& ELECTRICAL WIRING/CONDUIT

REMOVE & REINSTALL EXISTING CONTROL

PANEL. ALL ELECTRICAL WIRING SHALL BE

DISCONNECTED & MOVED AWAY FROM

CONSTRUCTION FOR PROTECTION.

(TO BE PROTECTED)

NOT TO SCALE

NOT TO SCALE

NOT TO SCALE

SURGE SHT AERATION CLARIFIER

DECHLORINATION

CHLORINATION

13'-6"2'-0"7'-3" 5'-6" 3'-0"

3'-0"

Work Sequence

RIVAN 186880 01 12 16 - 1

SECTION 01 12 16

WORK SEQUENCE

PART 1 GENERAL

1.01 SUMMARY

A. General identification of Work sequence.

1.02 QUALITY ASSURANCE

A. Coordinate all equipment shutdowns, startups, and general scheduling with Owner.

1.03 SUBMITTALS

A. Work Plans:

1. Work plans and schedules shall be submitted for all work activities involving temporary shutdown of the Owner’s wastewater treatment plant.

2. Work plans and schedules shall be submitted for all temporary wastewater hauling procedures that will be performed.

3. Work plans and schedule shall be submitted for process equipment testing and/or commissioning prior to system start-up once all process equipment is reinstalled.

4. Work plans and schedule shall be submitted for all work activities involving repair and rehabilitation of the wastewater tankage.

5. Others as required by the Owner and/or specified elsewhere.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 GENERAL

A. Coordinate construction schedule and operations with Owner and Engineer.

B. Determine type and extent of temporary facilities the Project requires to maintain continuous operation.

C. Provide all temporary connections, parallel temporary lines, temporary power, temporary bulkheads, temporary equipment, and temporary operations necessary to perform Work.

D. The Owner may disallow any impacts to system or facility operations due to expected, and/or unexpected system demands. In the event that the Owner has to cancel a planned shutdown, the Contractor shall work with the Owner to reschedule the shutdown at a mutually convenient time. No additional compensation shall be allowed due to the cancellation of a previously scheduled utility or system shutdown.

E. Submit a detailed Phasing Schedule. Schedule to include:

1. Proposed phasing for the Project.

2. Construction dates for each component of Work identified in each phase.

3. Description of Work sequence.

4. Description of interaction with existing plant facilities.

5. Temporary pumping, piping, and utility services to maintain operability for facilities.

6. A plan of action for each impact to normal operations of the system. A plan of action shall include:

a. Description of the work impacting normal operations including duration.

01 12 16 - 2 RIVAN 186880

b. Outline of procedure to minimize the amount of time normal operations will be impacted.

c. Description of potential issues that could arise and how to avoid/correct these issues.

d. Must be approved by Owner.

7. Resubmit until approved by Engineer.

F. Review existing facilities with Owner to become familiar with potentially difficult items that must remain in service. No Work procedures will be permitted that require shutting down of any portion of existing facilities, except as authorized by Owner.

3.02 SEQUENCING REQUIREMENTS

A. Construction sequencing of the proposed improvements are subject to Contractor’s means and methods. Contractor shall clearly identify work sequence on Construction Schedules. Schedule at a minimum should account for the following:

1. Temporary Pumping and Hauling (see 3.02.B below)

2. Removal of all process equipment

3. Inspection of tank prior to refinishing

4. Surface preparation of tank

5. Inspection of tank and metal repair coordination meeting (see structural sheet S101 note 1)

6. Application of coatings

7. Re-installation of equipment

8. Coordination with RWSA for re-introduction of wastewater into tank.

9. 7-day performance testing.

B. Temporary Pumping and Hauling

1. Contractor shall provide temporary pumping and hauling of wastewater to a truck or tank to be hauled offsite during the duration of time that the existing facility is offline.

a. Bypassing is anticipated for following construction activities. These activities may be conducted concurrently or in separate events at the discretion of the Contractor:

1) Removal of existing process equipment

2) Repair and rehabilitation of existing tankage

3) Installation of existing process equipment

4) Operational performance testing of existing process equipment

2. Temporary pumping and hauling can take place from the existing EQ tank during times that repair and rehab within the EQ tank is not being performed.

3. During the duration of time that repair and rehabilitation are being performed within the EQ tank, the Contractor shall provide temporary pumping and hauling from the upstream manhole. Refer to the Drawings for details.

4. The Stone Robinson school is anticipated to be occupied throughout the summer of 2026 with activity expected to take place from 8:00 a.m to 1:00 pm. The Contractor is responsible for temporary pumping and hauling of wastewater during times when wastewater flow is being produced.

5. Contractor shall coordinate with the Owner throughout this process to minimize the duration of time of bypassing and to maintain continued operation of existing facilities.

6. Contractor shall provide a written bypass plan a minimum 15 days prior to bypassing wastewater flow for comment by the Owner and Engineer.

7. Temporary pumping and hauling shall be designed by the Contractor for proper operation.

Operations shall meet the following requirements:

a. Expected peak hour flow: 3,000 gpd.

b. Expected average day flow: 1,500 gpd.

c. Temporary pumping shall include a minimum of two pumps, one duty and one standby.

Temporary pumping shall be in place to pump stored wastewater to a temporary storage tank or pump/haul truck parked onsite for duration of required downtime.

d. Temporary power and controls for pumping equipment.

8. Temporary hauling shall be in place to haul wastewater offsite in a timely duration so that no overflow of wastewater occurs during times when the existing facility is offline. Contractor is responsible for determining duration of hauling needed during times when the existing facility is offline.

RIVAN 186880 01 12 16 - 3

9. Temporary pumping and hauling shall include a tank of sufficient volume for temporary storage of wastewater throughout the entire day.

10. An alarm system shall be provided at the location of temporary pumping (EQ tank or upstream MH) to provide continuous notification of high water level at the location during times when the Contractor is offsite. The high level alarm level shall provide minimum of 2 hours of storage above high water alarm at peak conditions or sufficient time for a pump truck to arrive onsite with 1 hour of storage remaining, whichever is greater. The Owner and Engineer shall be notified of issues associated with temporary pumping and hauling procedures throughout the entire duration of operation.

11. Temporary pumping and hauling operations shall remain in place until all existing process equipment is installed completely. Coordination with the Owner shall be performed to determine when wastewater flow should be reestablished throughout the facility after installation is completed.

12. The existing process equipment shall operate without the need for operator intervention due to construction related issues for a minimum of 7 continuous days to be considered operational.

Temporary pumping and hauling should remain onsite until the 7-day period has been met and all equipment is determined to be fully operational as before.

C. Contractor is responsible for working with the Owner throughout these events.

END OF SECTION

This Page Left Blank Intentionally

Metal Fabrications

4/26 05 50 00 - 1

SECTION 05 50 00

METAL FABRICATIONS

PART 1 GENERAL

1.01 SUMMARY

A. Furnish and install metal fabrications to repair deteriorated steel on the WWTP interior tank walls.

Utilize continuous full circumference welds.

B. Provide:

1. Miscellaneous metal framing and supports.

2. Metal fabrication accessories including, but not limited to:

a. Electrodes for welding.

1.02 REFERENCES

A. Building Codes:

1. International Building Code

2. Virginia Uniform Statewide Building Code

B. ASTM:

1. A36 - Carbon Structural Steel

2. A123 - Zinc Coatings on Iron and Steel Products

3. A510 - Wire Rods and Coarse Round Wire, Carbon Steel

4. A513 - Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing

5. A786 - Hot Rolled Carbon, Low Alloy, High Strength Low Alloy, and Alloy Steel Floor

6. A992 - Structural Steel Shapes

C. AWS:

1. D1.1 - Structural Welding Code - Steel

2. D1.3 - Structural Welding Code - Sheet Metal

D. SSPC:

1. For Welding SP11 - Blast Cleaning

2. For Coating see specification 09 97 20.

1.03 DEFINITIONS

A. Metal Fabrications: Items made from steel shapes, plates, bars, strips, not part of other metal systems specified elsewhere.

1.04 SUBMITTALS

A. Product Data: Data for products used, including paint and coating products.

B. Safety Data Sheets (SDS) for each product specified.

C. Shop Drawings:

1. Detail fabrication, erection of each metal fabrication indicated. Include plans, elevations, sections, details of metal fabrications, and their connections.

D. Welder Certificates: Signed by Contractor certifying that welders comply with specified requirements.

05 50 00 - 2 4/26

E. Qualification Data: For firms and persons specified, to demonstrate their capabilities and experience.

Include list of completed projects with project names, addresses, names of Architects and Owners, and other information specified.

1.05 QUALITY ASSURANCE

A. Qualifications:

1. Welding Processes and Welding Operators:

a. Qualify in accordance with AWS D1.1 “Structural Welding Code - Steel,” and D1.3 “Structural Welding Code - Sheet Steel.”

b. Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification.

1.06 SITE CONDITIONS

A. Field Measurements:

1. Check actual locations of walls, other construction to which metal fabrications must fit, by accurate field measurements before fabrication.

2. Show recorded measurements on final Shop Drawings.

3. Where field measurements cannot be made without delaying Work, guarantee dimensions, proceed with fabrication without field measurements.

4. Coordinate construction to ensure that actual opening dimensions correspond to guaranteed dimensions. Allow for trimming and fitting.

B. Environmental Conditions for Application of Coating Systems see specification 09 97 20.

1.07 SEQUENCING AND SCHEDULING

A. Coordinate installation with tank clean out schedule.

PART 2 PRODUCTS

2.01 METALS

A. Metal Fabrications Exposed to View:

1. Provide materials selected for surface flatness, smoothness, and freedom from surface blemishes.

2. Do not use materials whose exposed surfaces exhibit pitting, seam marks, roller marks, rolled trade names, roughness, and, for steel sheet, variations in flatness exceeding those permitted by reference standards for stretcher-leveled sheet.

B. Steel Shapes, Plates, and Bars: ASTM A36.

C. All other steel shapes, plates and bars: ASTM A36.

2.02 FINISHES

A. Comply with NAAMM “Metal Finishes Manual” for recommendations relative to application and designations of finishes.

B. Finish metal fabrications after assembly.

C. Regulatory Requirements:

1. Products shall comply with the United States Clean Air Act for maximum VOC content.

2. Products shall comply with state environmental and health standards.

3. All products shall be lead, chromate, mercury and heavy metals free.

D. Thinners: Use thinners approved by coating manufacturer and within their recommended limits.

4/26 05 50 00 - 3

E. Abrasives:

1. Abrasive materials must be in compliance with state environmental and health standards.

2. Properly size abrasives to provide the specified surface profile.

3. The use of abrasives exceeding 1 percent free silica is prohibited.

F. Surface Preparation Classifications:

1. P3: SSPC-SP11 - Blast Cleaning to Bare Metal

2. Surface Preparation in the field for coatings see specification 09 97 20

G. Application:

1. Primer Application:

a. Apply shop primer to uncoated surfaces of metal fabrications, except those with galvanized finish or to be embedded in concrete, sprayed-on fireproofing, or masonry, unless otherwise indicated.

b. Brush-apply primer or intermediate on all welds and edges prior to general application of finish coat.

c. Comply with requirements of SSPC-PA1 “Paint Application Specification No. 1” for shop painting.

2. Apply in accordance with manufacturer’s directions.

a. Do not apply in snow, rain, fog, mist, or damp surfaces.

b. Allow wet surfaces to dry thoroughly and attain the temperature and conditions specified before proceeding with or continuing the painting operation.

c. Work may continue during inclement weather only if areas and surfaces are enclosed and temperatures within the area can be maintained within limits specified during application and drying periods.

3. Use equipment and techniques best suited for substrate and type of material being applied.

4. Avoid degradation and contamination of surfaces and avoid intercoat contamination.

a. Surfaces shall be free from grease, oil, abrasives, and other contaminants that may have an adverse effect on coating application, bonding, curing, or performance.

b. Clean contaminated surfaces before applying next coat.

c. Do not paint over dirt, rust, scale, grease, moisture, scuffed surfaces, or conditions otherwise detrimental to formation of a durable system.

5. Provide application thickness to specific mil requirements. Mil thicknesses referenced are in dry mil thickness.

PART 3 EXECUTION

3.01 FIELD QUALITY CONTROL

A. Comply with requirements of IBC chapter 17 for special inspection and testing frequency and responsibilities.

B. Steel special inspections shall be in accordance with the quality assurance inspection requirements of

AISC 360.

C. Work of Other Trades: Prior to commencing work, carefully inspect and verify that work is complete to point where this installation may properly commence.

D. Verification of Conditions: Verify that Metal Fabrications may be installed in accordance with original design, pertinent codes and regulations, and pertinent portions of referenced standards.

E. Discrepancies: Immediately notify Owner. Do not proceed with installation in areas of discrepancy until fully resolved. Commencement of installation signifies acceptance of surface conditions.

05 50 00 - 4 4/26

3.02 INSTALLATION, GENERAL

A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installation of miscellaneous metal fabrications. Set metal fabrication accurately in location, alignment, and elevation; with edges and surfaces level, plumb, true, and free of rack; and measured from established lines and levels.

B. Field Welding: Comply with AWS Code for procedures of manual shielded metal-arc welding, appearance and quality of welds made, methods used in correcting welding work, and the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

4. At exposed connections, finish exposed welds and surfaces smooth and blended so that no roughness shows after finishing and contour of welded surface matches those adjacent.

3.03 TOLERANCES

A. Install in required position and within following tolerances:

1. Maximum variation from plumb: 1/4-inch.

2. Maximum offset from true alignment: 1/4-inch.

3. Tolerances for steel shapes shall not exceed those specified in AISC.

3.04 ADJUSTING AND CLEANING

A. Repair damage to coatings per manufacturer’s recommendations.

B. Collect offcuts and scrap and place in designated areas for recycling.

END OF SECTION

Coating Systems for Wastewater Facilities

RIVAN 190497 09 97 20 - 1

SECTION 09 97 20

COATING SYSTEMS FOR WASTEWATER FACILITIES

PART 1 GENERAL

1.01 SUMMARY

A. Provide surface preparation and application of high performance industrial coatings.

B. Related Sections:

1. Section 05 50 00 – Metal Fabrications

1.02 REFERENCES

A. ASTM - American Society for Testing Materials

1. ASTM D4263

2. ASTM F1869

B. International Association of Corrosion Engineers (NACE)

1. SSPC-PA2

2. NACE RP0188

C. International Concrete Repair Institute (ICRI)

D. Society for Protective Coatings (SSPC):

1. Volume 1: Good Painting Practice

2. Volume 2: Systems and Specifications

1.03 DEFINITIONS

A. Applicator: Person applying the product in the field at Site.

B. Dry Film Thickness (DFT): Minimum dry coating thickness.

C. SFPG: Square feet per gallon.

D. VOC: Volatile Organic Compounds.

E. Regional: The state in which the Project is located and surrounding states.

F. LEL: Lower Explosion Limit.

G. Containment: Equipment, supports, screens, tarps, or shrouds that prevent airborne debris generated during surface preparation and coating application from entering the environment and also facilitates controlled collection of debris for disposal in compliance with current regional and federal regulations.

H. Moderate Service: Surfaces subject to normal exposure and moderate humidity. Includes concrete, concrete masonry, structural steel, miscellaneous metals, doors, and frames.

I. Severe Service: Surfaces subject to frequent splashing, spilling, and exposure to high humidity and condensation. Includes structural steel, miscellaneous metals, piping, valves, and equipment.

J. Immersion Service: Surfaces subject to immersion, or constant exposure to high humidity and condensation.

09 97 20 - 2 RIVAN 190497

1.04 SUBMITTALS

A. Manufacturers’ current Product Data sheets.

1. Coatings

2. Abrasive(s)

3. Additives (as applicable)

4. Containment System

5. All miscellaneous fillers, caulks, sealants and resurfaces, etc.

B. Provide a list of equipment to be used on this Project for review by Engineer.

C. Safety Data Sheets (SDS) for each product specified.

D. Samples:

1. Color chips of available colors.

2. Recommended colors for color code marking.

E. Post-construction Contract Closeout:

1. Daily application records using Engineer’s provided format, or Contractor’s form pre-approved by

Engineer.

F. Written plan for containment of fugitive airborne particles compliant with current state and/or federal regulations.

1.05 QUALITY ASSURANCE

A. Single Source Responsibility: Provide coating products from a single manufacturer.

B. Applicator Qualifications:

1. Contractor shall provide a written statement from the coating manufacturer’s authorized representative attesting that the on-site Contractor Superintendent has been instructed on proper preparation, mixing, and application procedures for all the coatings specified for this project.

2. Contractor shall provide all necessary equipment to monitor and record the information required on the Daily Application Record.

a. Equipment shall be in good condition.

b. Operational within its design range.

c. Calibrated as required by the specified standard for use of each device.

3. Applicator to establish quality control procedures and practices to monitor phases of surface preparation, storage, mixing, application, and inspection throughout the duration of the project.

Contractor to provide a full-time, on-site person whose dedicated responsibilities will include quality control of the corrosion protection linings.

4. Applicators’ quality control procedures and practices must include the following items:

a. Training of personnel in the proper surface preparation requirements.

b. Training personnel in the proper storing, mixing, and application and quality control testing of the linings.

C. Pre-Installation Conference:

1. Before applying any materials, the Contractor, Installer and qualified technical representative of the corrosion protection lining manufacturer shall meet on-site with Engineer to discuss approved products and workmanship to ensure proper application of the corrosion protection lining components and substrate preparation requirements.

2. The contractor ran meeting shall include an observation of the substrate to verify that the specified coatings are suitable for the environmental conditions and substrate.

3. Review foreseeable methods and procedures related to the corrosion protection lining of coating Work including but not necessarily limited to the following:

a. Review Project requirements and the Contract Documents.

b. Review required submittals, both completed and yet to be completed.

c. Review status of substrate Work, including approval of surface preparations and similar considerations.

RIVAN 190497 09 97 20 - 3

d. Review requirements of on-Site quality control testing and requirements for preparing Site Quality Control Report as specified herein.

e. Review availability of materials, tradesmen, equipment and facilities needed to make progress and avoid delays.

f. Review required inspection and testing.

g. Review environmental conditions, other Project conditions, and procedures for coping with unfavorable conditions.

h. Review regulations concerning code compliance, environmental protection, health, safety, fire and similar considerations.

i. Review procedures required for the protection of the corrosion protection lining during the remainder of the construction period.

4. Contractor Shall Record the discussions of the Pre-Installation Conference and the decisions and agreements or disagreements reached and furnish a copy of the minutes to each party attending.

Record any revision or changes agreed upon, reasons therefore, and parties agreeing or disagreeing with them.

5. Contractor shall document and distribute meeting minutes to all attendees.

6. Reconvene the conference at the earliest opportunity if additional information must be developed to conclude the subjects under consideration.

D. Performance Criteria: The surfaces to receive the protective lining shall be capable of withstanding under constant exposure to raw wastewater, permeation from hydrogen sulfide and other sewer gases, and attack from organic acids generated by microbial sources. Products must have sufficient field history to substantiate product viability for these exposures.

E. Source Quality Control: Provide each component of protective lining produced by a single manufacturer; including recommended repair mortar, repair overlay (resurfacer), base coat and topcoat materials.

F. Reference Standards: Comply with applicable provisions and recommendations of all standards listed in Section 1.2 except as otherwise shown or specified.

G. Qualifications:

1. Applicator shall have minimum of 5 years application experience on projects of similar size and scope.

2. Provide written statement from coating manufacturer’s authorized representative attesting that

Applicator has been instructed on proper preparation, mixing, and application procedures for coating specified.

3. Provide regional references for coating contractor for a minimum of 5 different projects of similar size and scope completed in the last 5 years, including:

a. Contact person and phone number.

b. Project location.

c. Cost of coating work.

d. Start/finish dates.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to Site in original, factory-sealed containers bearing manufacturer’s intact name and legible label with the following information.

1. Material identification by name or number.

2. Manufacturer’s stock number, batch number, and date of manufacture.

3. Color name and number.

B. Storage:

1. Store materials in an environmentally controlled location as recommended by coating manufacturer’s product information guidelines.

2. Store materials not in actual use in tightly covered containers.

3. Comply with health and fire regulations of governing authorities having jurisdiction.

09 97 20 - 4 RIVAN 190497

C. Handling:

1. Handle materials in a manner that precludes the possibility of contamination or incorrect product catalyzation.

2. Do not open containers or mix components until surface preparation has been completed and approved by Engineer.

3. Maintain containers used for storage, mixing, and application in a clean condition, free of foreign materials and residue.

1.07 PROJECT CONDITIONS

A. Site Facilities:

1. As necessary to maintain required ambient conditions and contract scheduling, the contractor shall provide all required equipment for supplemental heating, dehumidification and power.

2. Maintain environmental conditions, including temperature, dew point and humidity within range recommended by coating manufacturer.

3. Do not use heat sources that emit carbon dioxide or carbon monoxide into areas being coated.

4. Properly locate and vent all such heat sources to the exterior such that coating systems are unaffected by exhaust products.

5. Provide lighting to the satisfaction of Engineer to illuminate the complete workspace during blasting, coating, and inspection operations.

B. Environmental Conditions:

1. Coating shall not be applied in rain, snow, fog, or mist.

2. Conduct surface preparation and coating operations only when the following conditions are met.

a. Ambient air temperature is within limits recommended by coating manufacturer.

b. Steel surface temperature is more than 5 degrees above the dew point of the ambient air.

c. Surfaces to be painted are clean and completely dry.

3. Immersion Service: Continuous forced ventilation in accordance with manufacturer’s recommendation.

a. At a minimum provide 3 to 5 air exchanges per hour for 12 hours after application of the…