Addendum

RIVAN 184461 00 00 11 - 1

DOCUMENT 00 00 11

ADDENDUM NO. 1

October 12, 2026

Airport Road Pump Station & Storage Tank Improvements Rivanna Water & Sewer Authority

Albemarle County, Virginia

SEH No. RIVAN 189740 IFB No. 448

From: Short Elliott Hendrickson Inc.

400 Locust Drive, Suite 2 Charlottesville, VA 22901 651.490.2000

To: Document Holders

DOCUMENT HOLDERS on the above-named project are hereby notified that this document shall be appended to, take precedence over and become part of the original bidding documents dated September 24, 2026 for this work. Bids submitted for the construction of this work shall conform to this document.

This addendum consists of two (2) pages plus the following:

o Pre-bid Meeting Agenda o Revised Bid Form o Revised Sheet C201 o Revised Specification 33 16 20 Welded Steel Water Storage Tanks o Revised Specification 33 11 00 Water Distribution Systems

Clarifications and Additional Information:

1. Sheet C201 – In addition to other changes detailed below, Level Spreader underdrain outlet pipe and VDOT EW-12 outlet shifted Northwest approximately 20’ and labeled “grade to daylight”.

2. Prebid meeting agenda is attached to this addendum for reference.

3. Prebid meeting attendance information provided below:

Contact Name Company Name Email Address

Nate Nickerson SEH nnickerson@sehinc.com 434-202-6627

Matt Nguyen SEH mnguyen@sehinc.com 651-302-7670

Brad Weiss SEH bweiss@sehinc.com 507-440-7485

Michelle Simpson RWSA msimpson@rivanna.org

Jeff Binder W.M. Schlosser Co. BIDS@WMSchlosser.com 301-773-1300

Hartwell Dillard Waco Inc. hdillard@wacoinc.net 804-947-9307

Josh Clifton English Construction jclifton@englishconst.com 434-845-0301

Erin Lee Morgan Contracting estimating@morgan1.com 865-335-6944

William Landsaw Snyder Environmental Services, LLC wlandsaw@snyderenv.com 304-725-9140

Matthew Gibson Faulconer Construction Company mgibson@faulconerconstruction.com 434-422-6025

Jim Jordan Anderson Construction jjordan@andersonconst.com 434-239-4913 mailto:twebb@sehinc.com mailto:mnguyen@sehinc.com mailto:bweiss@sehinc.com mailto:msimpson@rivanna.org mailto:BIDS@WMSchlosser.com mailto:hdillard@wacoinc.net mailto:jclifton@englishconst.com mailto:estimating@morgan1.com mailto:wlandsaw@snyderenv.com mailto:mgibson@faulconerconstruction.com mailto:jjordan@andersonconst.com

00 00 11 - 2 RIVAN 178052

David Coon Waco Inc. davidcoon@wacoinc.net 804-382-1133

Austin Windham Tnemec austinwindham@tsecoatings.com 336-482-5738

Jack Hill Fisher Tank Company Jhill@fishertank.com

E.G. Wade E.Granville Wade, Jr Inc egwadejr@comcast.net 804-746-5434

Bidder Questions:

1. Question: Bid Form: The Base Bid “Part C” description is incomplete between pages 1 and 2. Please clarify.

Response: Bid form has been updated

2. Question: Spec Section 33 16 20-1.05.A.3: Is the GC/Bidder to submit their respective welded steel tank subcontractor’s qualification per this section of the spec “The Tank Contractor shall submit with the bid, experience lists confirming compliance with the qualification and equipment criteria, including location, completion date, contact names, and telephone numbers. Failure to submit any of the requirements with the bid will cause the bid to be considered non-responsive and the bid will be rejected”? Please clarify.

Response: Contractor must submit qualifications for themselves or subcontractor per spec 33 16 20 to satisfy requirements.

3. Question: Spec Section 33 16 20-1.07.B: This section contradicts spec section #01 51 00 “Temporary Utilities” in that “33 16 20” states that electric power and water is available at the site for use by the contractor with the costs being the responsibility of contractor. Spec Section “01 51 00” implies the services are to be installed separate form what’s already available onsite. Please clarify if GC can use onsite electrical service &/or water without providing “new service” and any associated costs.

Response: Any temporary utilities shall be per specification 01 51 00, Spec 33 16 20 has been updated to reflect this.

4. Question: Spec Section 33 11 00-2.04.A.3a & A.11a: These two sections (and other sections) reference “two

(2) 12-inch gate valves to be installed in the direction of the run of the tee at the tie in with the ACSA watermain shall not be geared”. These valves are not shown on the contract drawings, are they even required? Please clarify.

Response: These valves do not exist and have been removed from the specification.

5. Question: Contract Drawing E101, E601 and Spec Section “40 92 01 - Control Panels & SCADA”: Where are the Control Panels detailed for this project?

Response: Control Panels are shown on Electrical Site Plan E101 and typical elevation given on E601. Mixer and Valve control panels are by associated vendors. Distributed I/O panel is not detailed further and will be in accordance with specifications.

6. Question: Contract Drawing P101, details “4/P101”&“5/P101”: Are Keynotes #2, 3, 5 & 6 referenced correctly?

Please clarify.

Response: Yes, pipe crossing detail keynotes are correct, with MJ pipe fittings.

7. Question: Spec Section “40 91 19-2.02: Calls for a “Switch – Float (for installation in Sampler Panel)”, where is the “Sampler Panel” detailed?

Response: Graphical representation of sample station is provided on A/DP502.

8. Question: Bid Form: The Base Bid “Part A ” descriptive paragraph states “PART A. Lump sum price for construction of all work, except for the excavation of additional unsuitable material in PART B and C , in accordance with the Plans and Specifications”. However, the next paragraph on the Bid Form states “Base Bids for PARTS B, C, and D ”. Should “Part D” be added to the “Base Bid Part A” descriptive paragraph?

Please clarify

Response: Bid form has been updated mailto:davidcoon@wacoinc.net mailto:austinwindham@tsecoatings.com mailto:egwadejr@comcast.net

RIVAN 184461 00 00 11 - 3

9. Question: Contract Dwg’s #C200 & C501: Calls for the new Retaining Wall to have approximately 130LF of “Safety Rail”. No details are provided on the drawings for the rail. Also, contract spec section “32 32 20 - Modular Block Retaining Walls” doesn’t reference any rail either. Please provide details for the safety rail.

Response: Retaining Wall shall be provided as a fully designed system from vendor. This includes safety rail.

Information on drawings gives required height and mid-rail, stamped shop drawings and calculations provided during construction shall detail this further.

10. Question: Contract Dwg #C201 “Stormwater Layout – Plan & Profile: The pipe between CB-3 & ABS-1 is called to be 8” on the plan view and 15” RCP on the profile. Please clarify what size and type of pipe should be furnished.

Response: Sheet C201 has been updated pipe is 15” RCP

11. Question: Contract Dwg #C201 “Stormwater Layout – Plan: What type of 8” pipe should be furnished for the underground storage outlet to the level spreader?

Response: C201 updated to reflect Dual Wall Corrugated HDPE pipe

12. Question: How much fence is to be replaced? Type? New fence to be installed not shown on plans.

Response: Refer to C101, Site Note: 1. ANY FENCING THAT IS DISTURBED SHALL BE REPLACED IN

KIND. TEMPORARY FENCING SHALL BE INSTALLED TO PREVENT UNAUTHORIZED ACCESS TO THE

SITE DURING ENTIRE CONSTRUCTION PERIOD. TYPE OF TEMPORARY FENCING SHALLBE

ANCHORED TO THE GROUND, CONTINUOUS PANELS AND 6' MIN. HEIGHT.

Note: Receipt of this Addendum No. 1 (dated October 12, 2026) shall be acknowledged on the submitted Bid Form. Failure to do so may subject Bidder to disqualification.

END OF ADDENDUM

PRE-BID MEETING AGENDA

AIRPORT ROAD PUMP STATION & STORAGE TANK IMPROVEMENTS

ALBEMARLE COUNTY, VA

RIVANNA WATER & SEWER AUTHORITY

RWSA IFB NO. 448

SEH PROJECT NO. RIVAN 189740

DATE: Tuesday, October 6th, 2026

TIME: 9:00 AM (EST)

LOCATION: Virtual Meeting

1. Introduction

2. Meeting to be recorded.

3. Please type your name, company name, email address and phone number in the chat for meeting sign-in.

4. Owner: Rivanna Water & Sewer Authority

a. Project Manager: Jennifer Whitaker

b. Please contact Jennifer Whitaker at (434) 977-2970 ext. 104 to coordinate a site visit.

5. Engineer: Short Elliott Hendrickson, Inc (SEH)

a. Project Manager: Nate Nickerson, PE

b. Project Engineer: Matt Nguyen, PE

6. Bid Time/Date: 3:00 PM, October 22, 2026

7. Bid Location:

a. Bids to be turned into:

Moores Creek Administration Building, 695 Moores Creek Lane, Charlottesville, VA 22902 or, submit electronic bids via eVA’s electronic bidding system

b. Bids to be opened and read aloud.

8. Project Location:

a. Airport Road Pump Station, 4383 Berkmar Drive, Charlottesville, VA 22911

9. Basic Contract: See Contract Forms in the Project Manual.

10. Bid Form:

a. Lump Sum for Ground Storage Tank Improvements

11. Project Schedule:

a. Start: Following Notice to Proceed. No work may be performed prior to issuance.

Airport Rd & Ground Storage Improvements

October 6, 2026

b. Substantial Completion: Within 415 calendar days from when the Contract Times commence to run.

c. Final Completion: Within 445 calendar days from when the Contract Times commence to run.

d. Liquidated Damages:

i. $750 per day for work incomplete beyond substantial completion.

ii. $1,000 per day for work incomplete beyond final completion.

12. Project Coordination:

a. Owner will occupy the premises and operate Pump Station during entire construction period.

i. Pump Station must remain in service at all times. See 01 12 16 Work Sequence specification for additional requirements related to electrical replacements.

ii. Maintain access to existing facilities including but not limited to: access driveways, Pump Station building, generator and pump (located under Pump Station Awning).

iii. Bringing new equipment online and disinfection, see specification 01 12 16 for work sequence coordination related to bringing new equipment online.

b. Pump Station must always be kept functional.

c. No work can occur where pump station building would be left unsealed, non-weathertight, unlocked, or in an unsecured state.

d. Site fencing shall be secured using temporary fencing as needed when fencing is removed during construction. Fencing shall be atleast as secure as the remainder of site fencing.

e. Notify and coordinate with Owner at least two (2) weeks prior to any impacts to the pump station operations, unless otherwise stated in the Project Documents.

f. Detailed construction schedule is critical and shall be updated monthly at a minimum and shared with RWSA.

g. Other contractors may be working on various projects at the site throughout the course of the work. Contractor shall cooperate and coordinate activities with the Owners other contractors.

One known scope of work is installation of two pumps and associated VFD’s within the pump station which will likely be completed prior to start of construction.

13. Project Permits:

a. Obtain, keep current, and pay all fees for any necessary construction permits. Schedule and coordinate all required inspections with the permitting authorities. Permits include, but are not limited to:

i. As applicable

14. Basic Project Scope for the Ground Storage Tank Improvements includes the following major components:

a. Installation of one 1 Million Gallon Welded Steel Ground Storage Tank

b. Site Piping and Flow Control Valve

c. Site work Including

i. Graded pad for tank and future potential tank (not in contract)

ii. Retaining Wall

iii. Stormwater Collection and Underground Detention

iv. Final paving of drive and parking area

Airport Rd & Ground Storage Improvements

October 6, 2026

d. Electrical Upgrades including:

i. New Generator/ATS/MTS

ii. New Main Distribution Panel

iii. Upgraded Electrical Service

e. Instrumentation and controls including

i. Distributed I/O panel

ii. Control Valve Panel (from manufacturer)

iii. Mixer Panel (from manufacturer)

15. Hours of Work:

a. Normal business working hours of 7:00 a.m. to 6:00 p.m. Monday through Friday.

b. No onsite construction activities are allowed during weekends or RWSA holidays.

c. Hours for Utility Shutdowns: Coordinate with Owner’s activities minimum of 2 weeks in advance.

16. Non-Smoking Facilities.

17. Temporary Utilities (Section 01 51 00)

a. Meter and pay for water and electricity used for construction purposes.

b. Contractor to provide equipment and pay cost associated with temporary heating as needed during construction.

18. Site Cleanliness, Debris, Garbage and Sanitary Facilities

a. Keep sites clean at all times.

b. Pick up debris and keep all garbage in containers that preventing blowing.

c. Provide portable sanitary facilities for workers.

19. Questions

RA-1b RSWA Bid Form 7/31/2026

BID FORM

(Construction Form RA-1b)

DATE: _____________________________

PROJECT TITLE: Airport Road Pump Station and Storage Tank Improvements IFB 448

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

In compliance with and subject to the Invitation for Bids and the documents therein specified, all of which are incorporated herein by reference, the undersigned bidder proposes to provide all work necessary for construction of this project, in accordance with the Plans and Specifications dated _September 24th, 2026___, and the Addenda noted below, as prepared by Short Elliot

Hendrickson Inc, Charlottesville, VA_for the consideration of the following amount:

BASE BID (including the following parts but excluding work in Additive Bid Items):

PART A.

Lump sum price for construction of all work, except for the excavation of additional unsuitable material in PART B,C and D in accordance with the Plans and Specifications:

PART A = Dollars ($ ).

Base Bids for PARTS B, C, and D shall be based on the estimated quantities indicated to be provided complete and in accordance with the applicable portions of the plans and specifications. Payment amounts for each of these items will be based on the actual quantities authorized, provided and approved times the unit prices indicated by the bidder. The final contract amount shall be adjusted upward or downward based on the actual payment amounts versus the bid amounts for PARTS B, C, and D.

PART B. EXCAVATION OF ADDITIONAL UNSUITABLE MATERIAL

Excavation of unsuitable material, where authorized or directed, required for the Work in Parts A, and backfill with compacted material per specifications. (Price per cubic yard.) Final amount shall be adjusted upward or downward based on actual quantity authorized.

Estimated quantity of (_100__) cy @ $_________________ per cy = ________________

[A/E fill in estimated quantity to be included in bid]

PART B = Dollars ($ )

PART C. EXCAVATION OF ROCK MATERIAL

Excavation of ROCK material, where authorized or directed, and proper disposal off-site of excess material, complete per specifications. (Price per cubic yard.) Final amount shall be adjusted upward or downward based on actual quantity authorized.

Estimated quantity of (100) cy @ $ per cy = _________________

PART C = Dollars ($ )

PART D. EXCAVATION OF ROCK MATERIAL AT TRENCHES

Excavation of ROCK material, where authorized or directed, proper disposal off-site of excess material and backfill with compacted trench fill material per specifications.

(Price per cubic yard.) Final amount shall be adjusted upward or downward based on actual quantity authorized.

Estimated quantity of 50 cy @ $____________________ per cy = ________________

[A/E fill in estimated quantity to be included in bid]

PART D = Dollars ($ )

TOTAL BASE BID AMOUNT (For PARTS A, B, C, & D) IS:

_____________________________________________________ Dollars ($ )

ADDITIVE BID ITEM 1: Lump sum price for all work to N/A complete, in accordance with the drawings and specifications is Dollars ($ )

ADDITIVE BID ITEM 2: Lump sum price for all work to N/A complete, in accordance with the drawings and specifications is Dollars ($ )

Contract award will be based on the TOTAL BASE BID AMOUNT shown above (including any properly submitted bid modifications) plus as many Additive Bid Items taken in sequence as the Owner in its discretion decides to award.

The undersigned understands that time is of the essence and agrees that the time for Substantial Completion of the entire project shall be 520 consecutive calendar days from the date of commencement of the Work as specified in the Notice to Proceed, and Final Completion shall be achieved within 30 consecutive calendar days after the date of Substantial Completion as determined by the A/E.

Liquidated damages of $_____750_______________per calendar day shall be paid to the Owner for Work remaining to be completed beyond the Time for Completion.

Acknowledgment is made of receipt of the following Addenda: ______________________

If notice of acceptance of this bid is given to the undersigned within 60 days after the date of opening of bids, or any time thereafter before this bid is withdrawn, the undersigned will execute and deliver a contract in the prescribed form (Rivanna Authorities’ Contract Between Owner and Contractor, Form (RA-3)) within 10 days after the contract has been presented to him for signature. The required payment and performance bonds, on the forms prescribed, shall be delivered to the owner along with the signed Contract.

Immigration Reform and Control Act of 1986: The undersigned certifies that it does not and will not during the performance of the Contract for this project violate the provisions of the Federal Immigration Reform and Control Act of 1986, which prohibits employment of illegal aliens.

DISQUALIFICATION OF CONTRACTORS: By signing this bid or proposal, the undersigned certifies that this Bidder or any officer, director, partner or owner is not currently barred from bidding on contracts by any Agency of the Commonwealth of Virginia, or any public body or agency of another state, or any agency of the federal government, nor is this Bidder a subsidiary or affiliate of any firm/corporation that is currently barred from bidding on contracts by any of the same. We have attached an explanation of any previous disbarment(s) and copies of notice(s) of reinstatement(s).

CERTIFICATION OF NO COLLUSION: The undersigned does hereby certify in connection with the procurement and bid to which this Certification of No Collusion is incorporated that:

This bid is not the result of, or affected by, any act of collusion with another person engaged in the same line of business or commerce; nor is this bid the result of, or affected by, any act of fraud punishable under Article 1.1 of Chapter 12 of Title 18.1 of the Code of Virginia, 1950, as amended (18.2-498.1 et seq.).

The undersigned declares that they are fully authorized to sign the proposal on behalf of the firm listed and to all conditions and provisions thereof. The firm name given below is the true and complete name of the bidder and the bidder is legally qualified and licensed by the Commonwealth of Virginia, Department of Commerce, State Board for Contractors, to perform all Work included in the scope of the Contract.

Virginia License No. Bidder (Name of Firm)

Contractor Class By (Signature)

Valid Until (Typed Name)

FEIN/SSN: Title (Signature)

If Partnership (List Partner’s Names)

If Corporation, affix Corporate Seal & list State of Incorporation

State:

(Affix Seal)

Business Address:

Telephone No._________________ Fax No. ______________________

Water Distribution Systems

RIVAN 189740 33 11 00 - 1

SECTION 33 11 00

WATER DISTRIBUTION SYSTEMS

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes:

1. Furnish and install all below-grade (buried) water main pipe, fittings, valves, and appurtenances complete with all assemblies and accessories, as specified herein at locations shown on the Drawings including all fittings, appurtenances and transition elements required for a complete and operable installation.

2. All buried pipe and fitting joints shall be fully restrained.

3. Pressure testing, disinfection and flushing of assembled piping systems.

B. Pipe Connections

1. It is the intent of these specifications to require all fittings, sleeves, appurtenances and other elements as may be necessary to make complete, fully restrained pipe and fitting connections as being incidental to the Work.

2. Notes on the Drawings regarding connections to existing and new pipelines shall be understood to require all fittings, sleeves, appurtenances and other elements necessary to make complete pipe connections be provided and installed incidentally to the Work.

3. All pipe joints shall be fully restrained.

4. No additional compensation will be allowed for materials and/or labor required to make complete, fully restrained pipe and fitting connections.

5. Test pits or “potholing” is required at all locations where work involving, or occurring near, existing pipelines or electrical will occur.

C. General Products Specified Herein

1. Water main pipe and fittings.

2. Valves and boxes.

3. Execution.

D. Related Sections:

1. Section 01 12 16 - Work Sequence

2. Section 31 23 33 - Trench Excavation and Backfill

E. Measurement and Payment:

1. All Work and costs of this Section shall be incidental to the Project and be included in the Lump Sum Bid amount.

2. No additional payment will be made for burying proposed water main greater than the 3.5 foot minimum depth.

1.02 REFERENCES

A. ASTM:

1. A126 - Gray Iron Castings for Valves, Flanges, and Pipe Fittings

2. A307 - Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength

3. F593 - Stainless Steel Bolts, Hex Cap Screws, and Studs

4. F594 - Stainless Steel Nuts

B. ANSI/AWWA:

1. C105 - Polyethylene Encasement for Ductile -Iron Pipe Systems

2. C150/A21.50 - American National Standard for the Thickness Design of Ductile Iron Pipe.

3. C151/A21.51 - American National Standard for Ductile - Iron Pipe, Centrifugally Cast for Water or other Liquids

33 11 00 - 2 RIVAN 189740

4. C153/A21.53 - American National Standard for Ductile - Iron Compact Fittings, 3-inch through 64-inch, for Water Service

5. C502 - AWWA Standard for Dry-Barrel Fire Hydrants

6. C504 - AWWA Standard for Rubber - Seated Butterfly Valves

7. C515 - AWWA Standard for Reduced-Wall, Resilient-Seated Gate Valves, for Water Supply

Service

8. C600 - AWWA Standard for Installation of Ductile Iron Water Mains and their Appurtenances

1.03 SUBMITTALS

A. Submit Certificate of Compliance for products listed under Article 1.04.

B. Submit proposed method of joint conductivity.

C. Submit proposed pipe and pipe fitting restraint plan.

D. Submit flushing, testing and disinfection plans.

1. Plan for Disinfection Procedures, Including:

a. Methods, locations, and sequencing for all potable water piping systems.

b. Scheduling and testing in compliance with AWWA and Rivanna Water & Sewer Authority requirements.

c. Plan for Flushing Operations, including: Flushing water supply, flushing velocities, proper disposal of flushed and chlorinated water, and commissioning of water system.

d. Log of test results from an independent certified testing laboratory.

2. Plan for Hydrostatic Testing Procedures, Including:

a. Methods, locations, and sequencing for all required piping systems.

b. Scheduling and testing in compliance with AWWA and Rivanna Water & Sewer Authority requirements.

c. Report of test results.

E. Submit plans and schedules for pipe installation and water system connection work (by station numbers in increments) for Owner’s approval no later than 30 days prior to the proposed commencement of said work.

1.04 QUALITY ASSURANCE

A. Provide Certificates of Compliance from the manufacturer certifying that the following products meet the respective requirements listed in Article 1.02:

1. Pipes

2. Appurtenances

1.05 SEQUENCING AND SCHEDULING

A. Refer to Section 01 12 16 for discussions on potential Project sequencing and scheduling.

B. Notify Owners a minimum of 2 weeks, or other times as specified herein, prior to performing work.

C. All connection to existing system must be coordinated and scheduled with the Ownerand Engineer.

Connections shall be assumed to occur at off-peak hours on evenings or overnight. No additional costs will be allowed for off-peak, evening or nighttime work for connections to existing system.

D. The Owners (and ACSA where applicable) must open and close all existing valves and operate all existing pumps that may be effected by work of this Section. The Contractor shall NOT operate any portion of the Owner’s (or ACSA’s) Water Distribution System at any time.

E. Contractor is responsible for all pressure testing, disinfection and flushing of assembled piping systems in accordance with AWWA C600 and specifications herein.

RIVAN 189740 33 11 00 - 3

F. Successful completion of all required testing and inspections is required before restoration work occurs.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Inspection:

1. Inspect all pipe and products during the unloading process.

2. Notify Engineer of any cracked, flawed or otherwise defective products.

3. Remove all products found to be defective by the Engineer from the Site.

4. Ensure that all pipe be American, US Pipe or approved equal.

B. Handling and Storage: Handling and storage of products shall be in accordance with Section 2.2 of

AWWA C600.

PART 2 PRODUCTS

2.01 WATER MAIN PIPE

A. Approved Manufacturers:

1. American Cast Iron Pipe Co.

2. U.S. Pipe

3. Griffin Pipe Products, Inc.

4. Atlantic States Cast Iron Pipe Co.

5. Approved equals per Article 6.05 of the General Conditions.

B. Ductile Iron: AWWA/ANSI C151/A21.51-02 or current revision.

C. Cement-Mortar Lining: AWWA/ANSI C104/A21.4-03 or current revision.

D. Zinc Coating: All buried pipe shall have a shop applied zinc coated exterior

1. Shall conform to ISO 8179-1.

2. Shall include surface of the bell.

3. Zinc application rates shall be:

a. 200 g/m2 of pipe surface area for arc-sprayed zinc.

b. 150 g/m2 of pipe surface area for zinc-rich paint.

c. A finishing layer topcoat shall be applied to the zinc.

E. Minimum Wall Thickness Class: 52.

F. Nuts and Bolts: All nuts and bolts used in the assembly on ductile iron pipe shall be stainless steel or

Cor-Blue. Each gland shall include two 6-ounce large zinc anode caps as manufactured by Trumball Industries or Engineer-approved alternate.

G. Pipe Joints:

1. Restrained Pipe Joints:

a. Flex-Ring or Lock-Ring by American Cast Iron Pipe Company,

b. HP LOK or TR-Flex style by US Pipe,

c. Bolt-Lok or Snap-Lok by Griffen Pipe Products, or

d. Engineer approved equal restrained mechanical joint pipe.

H. Joint Conductivity:

1. Conductive gaskets as manufactured by American Ductile Iron Pipe Co.

2. Field Application Methods:

a. Burndy - Thermoweld by Burndy Corp., Norwalk, Connecticut.

b. Cadweld by Erico Products Co., Cleveland, Ohio.

3. Copper Jumpers:

a. Minimum 1/16-inch by 1/2-inch wide flat copper strip.

b. Annealed round copper wire conforming to ASTM B152, Type DHP.

33 11 00 - 4 RIVAN 189740

4. Nuts and Bolts: Silicon Bronze.

2.02 FITTINGS

A. Approved Manufacturers:

1. Tyler: with D.I. T-bolts or Corten steel bolts

2. Standard International: with Corten steel bolts

3. Union Foundry Co.

4. Star Pipe Products

5. Sigma Piping Products

6. Approved equals per Article 6.05 of the General Conditions.

B. Ductile Iron: AWWA/ANSI C153/A21.54 or current revision (epoxy coated)

C. Cement-Mortar Lining: AWWA/ANSI C104/A21.4-03 or current revision.

D. Zinc Coating: All buried pipe fittings shall have a shop applied zinc coated exterior

1. Shall conform to ISO 8179-2.

2. Shall include surface of the bell.

3. Zinc application rates shall be:

a. 200 g/m2 of pipe surface area for arc-sprayed zinc.

b. 150 g/m2 of pipe surface area for zinc-rich paint.

c. A finishing layer topcoat shall be applied to the zinc.

E. Joints: Mechanical with ASTM F593 and F594 type 304 Stainless Steel bolts and nuts.

F. Protective Fusion – Bonded Epoxy Coated: ANSI/AWWA C116/AZ1.116.

G. Nuts and Bolts: All nuts and bolts used in the assembly on ductile iron pipe shall be stainless steel or

Cor-Blue. Each gland shall include two 6-ounce large zinc anode caps as manufactured by Trumball Industries or Engineer-approved alternate.

2.03 RESTRAINED PIPE JOINT RETAINER GLANDS:

A. Approved Manufacturers:

1. EBAA - Iron Mega-Lug,

2. Sigma - ONE LOK,

3. Romac – Grip Ring

B. Materials and Construction:

1. Glands shall be ductile iron conforming to ASTM A536.

2. Restraining device shall be ductile iron, heat-treated to a minimum hardness of 370 BHN.

3. Restraining mechanism shall impart multiple wedging action against the pipe and increase its resistance as the pressures increase.

4. Dimensions shall permit use with all buried pipe and fitting connections and pipe material types and sizes.

5. Shall utilize twist-off nuts of the same size as the tee-bolts to ensure proper actuating of the restraining devices.

6. Minimum working pressure of 250 psi with factory safety of 2.

2.04 VALVES AND BOXES

A. Gate Valves:

1. Approved Manufacturers:

a. American Flow Control: Series 2500 resilient wedge valve (2 inch and larger).

b. U.S. Pipe: Metroseal 250 resilient seated gate valve (4 inch and larger).

c. Kennedy: Ken-Seal II resilient wedge gate valve (4 inch and larger).

d. Mueller: Series 2360 resilient wedge gate valve.

e. American AVK: Series 45 resilient wedge gate valve.

RIVAN 189740 33 11 00 - 5

f. Clow C515

2. Resilient Seated: ANSI/AWWA C509-01 or current version.

3. Valves 12 inches and larger shall be C515 gear driven gate valves with stainless steel hardware.

4. Working Pressure: 250 psig cold water working pressure.

5. Ends: Mechanical Joint.

6. Operating Stem: Non-Rising with O-ring Seals.

7. Operating Nut: 2-inch Square, Open Left.

8. Markings to be cast on the bonnet or body:

a. Open indicating arrow.

b. Manufacturer’s name.

c. Pressure rating.

d. Year of manufacture.

e. Size.

f. The words “D.I.” or “Ductile Iron” shall be cast on the valve or stamped on a permanently attached corrosion resistant metal tag

9. Protective Fusion - Bonded Epoxy Coated: ANSI/AWWA C116/AZ1.116.

10. Nuts and Bolts: Shall be class 304 stainless steel, Cor-Blue or approved equal bolts and nuts meeting the physical requirements of ASTM F593 and ASTM F594. The heads must be hexagon conforming to ANSI B18.2.1. Therefore, metric size, socket head cap screws are not allowed.

11. All geared valves in water main alignment shall be installed in a horizontal configuration to provide sufficient cover over top of valve.

B. Boxes:

1. Cast Iron, 5-1/4-inch shaft.

2. Vertical, 3 piece, Buffalo type.

3. Box length to provide for pipe cover as shown in the Drawings.

4. Adjustable to 6 inches up or down from standard box length.

5. Valve boxes shall be:

a. Bingham & Taylor Figure No. 4905

b. Equivalent by Capital Foundry

c. Equivalent by East Jordan Iron Works

d. Or equal pre-approved by Owner and Engineer.

6. Drop covers on valve boxes shall bear the word “WATER” on the top and shall be approved by the Owner.

7. All valves shall be supplied with “Valve Bonnet and Valve Adapters” as manufactured by Adapter Inc. or approved equal. Valve bonnet and adapters shall be considered incidental to the valves.

8. In case of either greater depth or less depth 3 1/2 feet, the valve boxes supplied shall allow a minimum of 6 inches of adjustment both ways.

9. Valves in excess of 8 feet shall have operator extensions installed to a point no less than 7 feet below proposed grade. The extension items shall be anchored with a set bolt to the valve nut and shall have a centering plate at the top of the stem. The stem shall have a universal joint to allow free movement.

2.05 MARKING TAPE

A. Contractor shall install marking tape directly above all water mains:

1. Minimum 2 inch wide blue colored non-metallic water marking tape

2. Buried approximately 2 feet below grade

3. Continuous marking tape

4. Replace any marking tape disturbed during construction

2.06 TRACER WIRE

A. Use tracer wire with all pipe: No. 8 AWG solid copper conductor with HDPE jacket.

B. Splices: All splices to be made with direct bury, waterproof spliced kits of adequate size to accommodate required wire.

C. Tracer wire connection boxes shall be installed every linear 500 ft along water main piping.

33 11 00 - 6 RIVAN 189740

1. Tracer wire connection boxes shall meet the requirement of valve boxes specified in this section.

2. At valve locations, the tracer wire be brought up in a second valve box, specifically for tracer wire access, located generally adjacent to the valve box.

D. 5-ft of tracer wire shall be spooled in each tracer wire access point, i.e., connection box, ARV, buried hydrant.

2.07 POLYETHYLENE ENCASEMENT

A. All buried water main and fittings shall be fully encased in polyethylene wrap.

B. Maufacturers:

1. V-Bio Enhance Polyethylene Encasement by:

a. American Pipe

b. U.S. Pipe

c. Or equal pre-approved by Engineer.

C. Material: 8-mil thick minimum linear low-density polyethylene film.

D. Flat tube form

E. Minimum width based on nominal pipe diameter in accordance with recommendations by Ductile Iron

Pipe Research Association.

2.08 INSULATION

A. Rigid, extruded polystyrene board insulation.

B. Thermal Resistance ®: 5.0

C. Thickness: 2-inch.

D. Board Size: 48-inch by 96-inch.

E. Compressive Strength: Minimum 25PSI.

F. Water Absorption in accordance with ASTM D2842: 0.1 percent by volume, maximum.

G. Edges: Square.

PART 3 EXECUTION

3.01 CONSTRUCTION REQUIREMENTS

A. Pipe and Fitting Joints:

1. All buried pipe shall be joined to adjacent pipe using a restrained pipe joint system as specified herein.

2. All fitting joints shall be fully restrained using restrained joint retainer glands.

B. Connection to Existing System:

1. Contractor shall provide a minimum of 2 weeks advanced written notice to the Engineer and Owners prior to making any cut-ins and/or connections to the Owners existing piping systems.

2. Contractor shall not operate any of the Owners valves without receiving direct, written approval to do so from the Owners.

3. Contractor expose the existing piping system prior to the start of any cut-in or connection work to identify the existing pipe depth, type and size.

4. Contractor shall provide all necessary materials, fittings, and appurtenances necessary to make a complete working connections between the existing system and the new systems.

RIVAN 189740 33 11 00 - 7

5. Cut-In Connection:

a. Prior to the start of any cut-in work, the Contractor shall pothole and expose the piping system to identify the existing pipe depth, type of pipe material and size of pipe.

b. Once the pipe segment has been isolated by valve closure by the Owners staff, the

Contractor shall drain water from the line.

c. The Contractor’s cut-in procedure shall observe all OSHA safety regulations as well as the requirements within these contract documents.

d. Connect tees and bends to pipe ends using sleeve assemblies.

e. Install blocking and mechanical joint restraint as required.

f. Cutting of ductile iron pipe for inserting valves, fittings, or closure pieces shall be done in a neat and workmanlike manner without damage to the pipe or cent lining and as to leave a smoother end at right angles to the axis of the pipe.

g. A mechanical joint gland or other appropriate device shall be used to ensure that the line drawn on the pipe to mark the cut is square with the axis of the pipe.

h. Flame cutting of pipe by means of acetylene torch shall not be allowed.

C. Pipe Installation:

1. Install pipe at the alignment and grade shown on the Drawings.

2. Precautions shall be taken to protect pipe interior, fittings, and valves against contamination during construction. Contractor shall visually examine each joint of pipe to prevent foreign material from entering the pipe while it is being placed in the trench.

3. During the laying operations, no debris, tools, clothing or other materials shall be placed in the pipe.

4. Water lines shall be plugged at the end of each construction day with watertight plugs to prevent foreign matter and water from entering them. If water accumulates in the trench, plugs shall remain in place until the trench is dry.

5. Wherever it is necessary to deflect the pipe from a straight line, either in vertical or horizontal plane, to avoid obstructions or to plumb the line for valve installation, or where long-radius curves are permitted, the amount of deflection allowed shall not exceed seventy-five (75) percent of the allowed deflection in AWWA Standard C600 or seventy-five (75) percent of the manufacturer’s allowable deflection, whichever is less.

6. Provide a minimum of 42 inches of cover over the pipe.

7. Install appurtenances in the locations shown on the Drawings.

8. Remove all dirt and foreign material from the pipe interior prior to installation.

9. See Section 31 23 33 for pipe foundation and backfill procedures.

10. See Section 31 23 33 in case of conflicts with existing pipes.

D. Valve and Box Installation:

1. Verify that subgrade material is adequate to support valve assembly.

2. Install valves with stems vertical and plumb.

3. Geared valves in water main alignment shall be installed in a horizontal configuration to provide sufficient cover over top of valve.

a. The two (2) 12” gate valves to be installed in the direction of the run of the tee at the tie in with the ACSA water main shall be installed in a vertical orientation.

4. Provide appropriate support blocking under the valve. Solid concrete blocks may be utilized to meet this requirement. Submit size and quantity per valve to Engineer for review prior to installation.

5. Install boxes plumb and centered over the valve nut.

6. Verify that box remains plumb and centered during backfill.

7. Adjust box cover to required grade.

E. Thrust Restraint:

1. All joints shall be restrained.

2. Where multiple fittings are to be installed in series Contractor shall install thrust restraint at each joint as required by this specification.

3. Restrained Joints:

a. Contractor shall use fully restrained pipe joint retainer glands or TR-Flex style (by US Pipe) or approved equal mechanical joint pipe.

b. Submit method and type to Engineer for approval.

33 11 00 - 8 RIVAN 189740

c. Install in accordance with “Thrust Restraint Design for Ductile Iron Pipe”.

4. Concrete Blocking for all fittings under the Pump Station structure, where shown on Drawings, or by Engineer approval:

a. Concrete thrust blocks shall have compressive strength of at least 2,500 psi.

b. Place between the fitting and undisturbed trench wall.

c. Minimum thickness: 12 inches.

d. Minimum area in square feet shall be in accordance with the following:

Pipe Tee or Plug 1/4 Bend

1/32 and 1/8 Bend

1/16 Bend

12-inch 8.1 13.4 6.6 3.2

18-inch 23.2 30.2 18.1 9.3

e. Size blocking based on the larger main.

f. Verify that bolts are accessible after concrete is poured.

g. Thrust blocks shall be poured after the pipe wrapping has been completed. Concrete shall not be in direct contact with the ductile iron.

3.02 PRESSURE TESTING

A. Prior to commissioning, all piping systems inclusive of all pipe, valves, fittings and appurtenances, shall be hydrostatically tested as specified herein:

B. Hydrostatic pressure testing shall occur prior to final disinfection.

C. The Contractor shall submit a pressure testing plan to the Engineer and Owners for review and approval a minimum of 30 days prior to when the testing event(s) is(are) to occur.

D. Basic Requirements:

1. All pipelines attached to the high service pumps or under distribution system pressure shall be pressure tested to 200 psi or one and one half (1.5) times the anticipated working pressure of the line, whichever is greater.

a. The test pressure shall not exceed:

1) the thrust restraint design pressure,

2) one and one half (1.5) times the pressure rating of the pipe or joint, or

3) the rated working pressure of the valves when the pressure boundary of the test section includes valves.

2. No permanent connections shall be made to the potable water system to fill or pressurize the waterline being tested.

a. If a temporary connection is made to the potable water system in order to fill the line being tested, then the potable water shall flow through a backflow prevention device approved by Owner and Engineer prior to entering the line being tested.

1) This temporary connection must be terminated before pressurization of test line begins.

3. Each valved section of pipe shall be slowly filled with water. Air shall be completely expelled from the pipe during the filling of the pipe. Once all air is removed from the pipe, the pipe shall be pressurized.

4. The pipe shall be pressurized using a suitable pump that is connected to the pipe in a manner approved by Owner and Engineer. The pump, water, and water container used to pressurize the pipe shall be properly disinfected by swabbing or spraying each with a one-percent hypochlorite solution.

5. The pressure in the pipe shall be allowed to stabilized at the test pressure before the hydrostatic test begins.

6. The hydrostatic test shall last a minimum of two hours.

7. During the test, the pressure in the waterline shall not vary by more than 5 psi from the test pressure.

a. The pressure in the waterline can be maintained within this tolerance by adding makeup water to the pipe during the test.

b. The makeup water shall be accurately measured by suitable methods.

RIVAN 189740 33 11 00 - 9

c. The allowable amount of makeup water shall be determined using the most recent AWWA C600-10. The current formula is as follows:

𝐿 =

𝑆𝐷√𝑃

148,000

L=allowable makeup water, in gallons per hour S=length of pipe tested in feet

D=the nominal diameter of the pipe, in inches P=the average test pressure, in pounds per square inch gauge

8. If the pressure in the pipe cannot be maintained for the duration of the hydrostatic test using the allowable amount of makeup water, then the Contractor shall, at his own expense, locate and repair the defective material until the pipe passes the hydrostatic test.

9. All visible leaks shall be repaired regardless of the amount of leakage.

10. All exposed pipe, fittings, valves, hydrants, and joints shall be examined carefully during the test.

Any damaged or defective pipe, fittings, valves or hydrants that are discovered following the pressure test shall be repaired or replaced with sound material and the test repeated until satisfactory to Owner and Engineer.

E. The Contractor shall provide the Engineer and Owner written notification of the intent to perform pressure testing a minimum of two weeks prior to intended time/date of testing.

F. The Contractor shall await written approval from the Engineer and Owner before proceeding with any testing efforts.

3.03 FLUSHING AND DISINFECTION

A. Prior to commissioning, all piping systems inclusive of all pipe, valves, fittings and appurtenances, shall be disinfected.

B. All new waterlines shall be disinfected using the continuous feed method as specified in

AWWA C651-14 or current revision, except as specified otherwise or approved in writing by Owner and Engineer.

C. The cost of all disinfection activities will be the responsibility of the Contractor.

D. It is the Contractor's responsibility to ensure their operations do not contaminate the public water supply. If at any time, the water in the existing system becomes contaminated, they shall be held financially accountable for any corrective action taken by the Owner, as well as for costs of defending and settlement of all claims resulting from their negligence, including, but not limited to, attorney’s fees.

E. Disinfection shall include hydrants and other special pipe, taps and fittings used at connections to existing piping. These shall be thoroughly disinfected before installation.

F. Excavation for such connections shall be kept free from water until the connection is completed and great care shall be exercised to prevent contamination of the pipe and connection fittings.

G. Chlorine feed for disinfection shall be by the continuous liquid injection method.

H. The Contractor shall submit a disinfection and bacteriological testing plan to the Engineer and Owners for review and approval a minimum of 30 days prior to when the testing event(s) is(are) to occur.

I. Steps to be taken in this effort shall follow the sequence

1. Preliminary Flushing

2. Chlorination for Disinfection.

3. Final Flushing.

4. Bacteriological Testing.

5. Place into service.

33 11 00 - 10 RIVAN 189740

J. Flushing

1. The water line shall be thoroughly flushed with potable water prior to disinfection to remove any debris that may have entered the line during construction.

a. The flushing velocity in the line shall not be less than three (3.0) feet per second.

b. Where such flow rates are not possible, flushing at the maximum expected flow rate for the line may be acceptable with written approval from Owner and Engineer.

c. Flushing should continue until the volume of water that has passed through the waterline is at least two and one half (2.5) times the volume of the waterline being disinfected and the results of a bag test show no debris. If a bag test shows any debris, then flushing shall continue until a bag test shows no debris.

2. The Contractor shall submit a flushing plan to the Engineer and Owners for review and approval a minimum of 30 days prior to when the flushing event(s) is(are) to occur. The flushing plan shall include identification of source water, piping scheme, flow velocities, discharge quantities and method and location for handling and discharging the spent water. The Contractor is responsible for, and shall ensure, that all discharges are handled in a law-abiding and compliant manner to all applicable environmental regulations.

3. No permanent connections shall be made to the potable water system for the purpose of flushing new water lines. If a temporary connection is made to the potable water system in order to flush a new water line, then the potable water shall flow through an RWSA approved backflow prevention device prior to entering the new water line.

a. Utilizing a portable pump with check valves is one method of preventing backflow and achieving the high flows that are needed to adequately flush large diameter waterlines.

4. Contractor’ s Materials and Set-Up

a. The Contractor shall be responsible for the means and methods for properly flushing the new piping systems as set forth in these project documents.

b. The Contractor shall provide all pumps, piping, fittings and appurtenances necessary to perform the flushing requirements identified herein.

c. The Contractor shall provide all flow meters and appurtenances necessary to monitor and validate the rate of flushing water flow to meet the 3.0 foot/second flow rates for each pipeline size.

d. The Contractor shall design, provide and operate a temporary pumping system to enable high velocity pipeline flushing as specified herein.

e. Contractor shall provide an approved flow meter to measure and verify the rate of water flow used for flushing.

f. The Contractor shall provide the source water for all pipeline flushing activities. This supply may be via a portable tank, a tanker truck, or by a protected connection with the Owner’s potable water system.

g. If the Contractor elects to utilize a connection with the Owner’s potable water system, the Contractor shall provide an approved reduced pressure zone (RPZ) backflow preventer to establish a protected connection with the Owner’s potable water system. The Contractor shall then connect the Contractor’s temporary flushing and pressure testing piping system to the RPZ and then connect the RPZ directly to the Owner’s potable water system.

h. The Contractor shall then connect the other end of the Contractor’s temporary flushing and pressure testing piping system to the new finished water pump station piping.

i. The Contractor shall review the discharge plan with the Engineer and Owner.

j. The Contractor shall provide all discharge piping, fittings, valves and appurtenances to safely convey spent water from the water lines to be flushed and the disposal location.

k. The Contractor shall provide all dechlorination chemicals and feed equipment to dechlorinate all spent flush water.

l. The Contractor shall operate and maintain the necessary dechlorination system during all flushing events.

m. The Contractor shall demonstrate how the dechlorination system operates and that it can properly reduce the chlorine residual to 0.0 mg/l.

n. During flushing operations, the Contractor shall take periodic samples of the discharge water to demonstrate that the chlorine residual is at 0.0 mg/l.

5. Preliminary Flushing:

a. Prior to disinfection, the piping systems shall be high-velocity flushed to remove any debris that may have entered the pipelines during construction.

RIVAN 189740 33 11 00 - 11

b. Flushing duration shall continue until 2.5 times the volume of water line being flushed has passed through the pipeline and results of a bag test show no signs of any debris remaining in the pipeline.

6. Final Flushing:

a. Following the disinfection retention period, the piping systems shall be flushed to remove the high concentration chlorine water reducing the chlorine concentration to less than 1 mg/l or no higher than that prevailing in the water used for flushing.

b. Discharge waters having chlorine levels in excess of 2.0 mg/l shall be dechlorinated prior to discharge.

c. Flushing to storm drains or creeks is not acceptable unless the water has been dechlorinated.

K. Water Line Chlorination

1. No permanent connections shall be made to the potable water system for the purpose of chlorinating new water lines. A temporary connection with an RWSA-approved backflow prevention device shall be utilized to deliver potable water to the new waterline.

2. Potable water shall be introduced into the new water line at a constant flow rate.

a. A liquid chlorine solution shall be added at a constant rate to this flow so that the chlorine concentration in the water in the new waterline is at least 50 mg/l (ppm).

b. The chlorine concentration shall be measured at regular intervals to ensure that the required concentration is achieved throughout the new waterline.

3. The chlorinated water shall remain in the pipe line at least twenty four (24) hours.

a. During the 24 hours, all valves and hydrants shall be operated to ensure they are properly disinfected.

b. After the 24 hour period the chlorine concentration in the water line shall be at least 10 mg/l.

c. The chlorine concentration shall be measured at regular intervals to ensure that the residual chlorine level throughout the waterline is acceptable.

3.04 BACTERIOLOGICAL TESTING

A…