BL115_23 Addendum 4.pdf

October 10, 2023

Addendum No. 4

BL115-23

LITTLE SUWANEE CREEK GRAVITY SEWER AND FORCE MAIN PROJECT

The following addition/changes modify the Bid No. BL115-23 “Little Suwanee Creek Gravity Sewer and Force Main Project” Contract Documents, dated August, 2023, as first advertised on August 16, 2023.

This Addendum is being issued to provide the following revisions and/or clarifications to the bid documents and answers to the questions received.

Clarifications

Make the following changes throughout the Front-End Documents specifications changes below:

C1. Please revise any reference to pre-qualification requirements to the following. The County is allowing interested bidders time to pre-qualify due to the change in the pre-qualification requirements as outlined below.

Firms shall be pre-qualified under both Installation, Replacement and/or Relocation of Gravity Sanitary Sewer Mains, Force Mains and Appurtenances Sub-Section 2 - Gravity Sanitary Sewer Mains ‐ Large, Greater than 12" and Installation, Replacement and/or Relocation of Gravity Sanitary Sewer Mains, Force Mains and Appurtenances Sub-Section 4 - Force Mains ‐ Large, 16" and greater.

Firms not currently pre-qualified under both Installation, Replacement and/or Relocation of Gravity Sanitary Sewer Mains, Force Mains and Appurtenances Sub-Section 2 and Sub-Section 4 will be allowed to submit during this advertisement period with all applications required to be submitted at least 3 weeks in advance of the Bid Opening date. If pre-qualified prior to Bid Opening, their bid submittal will be considered for award.

C2. Replace Specification Section 33 34 16 Sanitary Utility Sewerage Valves provided in Addendum No.

2 with the attached revised Specification Section 33 34 16 Sanitary Utility Sewerage Valves. This replacement has “REV ADD 4” noted in the footer of each page.

C3. See the attached Williams Gas Encroachment Application. Contractor awarded project is responsible for meeting requirements from Williams Gas as noted in this Encroachment Application.

Questions

Q1. What is the estimated cost for this project?

A1. There is approved funding for this project. Gwinnett County expects each contractor to bid at a competitive price. The award will be made to the lowest responsive and responsible bidder.

Q2. No spec provided on Stainless Steel Plug Valves for the Air Release Valves, please provide model number or accepted manufacturers.

A2. See C2 Addendum No. 4 above.

BL115-23

Addendum No. 4

Q3. Will this project include any Manhole or Wet Well interior rehabilitation via spray-applied coating (i.e. cementitious, epoxy, polyurea, etc.)?

A3. See Addendum No. 3 A5 to use coating in the ARV manhole in lieu of a composite manhole.

GCDWR does not intend to use this for rehabilitation of any existing structure.

Q4. Please provide the plan holders list?

A4. Please see attached most recent plan holders list.

Q5. Please provide the pre-bid sign in sheet.

A5. Please see the attached.

Q6. The Special Conditions on the Notice of Bid says it is for prequalified contractors of Subsection 1 of pressurized water mains. Could the prequalification subsection being used change prior to the bid opening?

A6. Please see C1 Addendum No. 4 above.

Q7. Addendum No. 3, Clarifications C3, states that air release valve installations shall be provided in accordance with the attached specification 33 34 16 Sanitary Utility Sewerage Valves. Does this specification section replace 33 12 16.12 Air Release and Vacuum Valves – Sewer? Please clarify.

If so, 33 34 16 does not allow for the ARI Model D-025 as shown on Sheet 31, Detail PS-10B. Please clarify.

A7. Yes. See Specification Section 33 34 16 REV ADD 4, C2 Addendum No. 4 above, which includes “Engineer approved equal” for the Sewage Air Release Valves.

Q8. Specification Section 33 34 16 Sanitary Utility Sewerage Valves, 2.2 Plug Valves, Paragraph C, states a minimum % port area of 67%. Typically, GCDWR requires this to be 100% port area. Please clarify.

A8. See C2 Addendum No. 4 above.

Q9. Specification Section 33 34 16 Sanitary Utility Sewerage Valves does not provide the specification for the required stainless steel plug valve shown on Sheet 31, detail PS-10B. Please provide the specification for the stainless-steel plug valve.

A9. See C2 Addendum No. 4 above.

Q10. Addendum No. 3, Question and Answer #8, clarifies that the curb and gutter will be paid under Bid Item No. 4. Based on the answer response for paving, the Contractor will be responsible for replacing any damaged asphalt. What are the required limits of restoration beyond the immediate impacted area in the roadway.

A10. The Contractor shall be responsible for replacing damaged asphalt outside the lines and grades specified over an area extending from 2-ft beyond the damaged pavement to the nearest curb line. If the Owner requests additional paving in order to have a better tie-in location, the additional pavement shall be paid under Bid Item 1, Asphalt Pavement Resurfacing.

Attachments

• BL115-23 Revised Bid Schedule 10/10/2023

• BL115-23 Plan Holders List dated 10/10/2023

• BL115-23 Pre-bid Sign In Sheet 09/07/2023

• Specification Section 33 34 16 Sanitary Utility Sewerage Valves - REV ADD 4

• Little Suwanee Creek Project - Williams Gas Encroachment Application 10.03.23

Acknowledge receipt of this addendum on the firm information page of the request for proposal.

Sincerely, Brittany Bryant Purchasing Associate II

BID FORM

BID NUMBER: BL115-23

BID DATE: SEPTEMBER 21, 2023

COMPANY NAME:

BIDDER’S SIGNATURE:

4. Bidder submits the following lump sum/unit prices for the Little Suwanee Creek Gravity Sewer and Force Main Project identified in Bid Form as part of this Bid.

Work included within each Bid Item is described in the Specification Section listed for that Bid Item. Payment for each Bid Item is described in Specification Section 01 22 15.11 – Measurement and Payment and Section A-01 22 15.11 – Supplemental Measurement and Payment listed for that Bid Item.

BID SCHEDULE

BID

ITEM

NO.

SPEC.

SECTION

DESCRIPTION

EST. QTY

MINIMUM

PRICE

UNIT PRICE

EXTENDED

PRICE

PART 1 - UNIT PRICE ITEMS

1 32 12 16 Asphalt Pavement Resurfacing (Measurement & Payment Item #1b)

4,000 SY $ $

2 34 71 00 Driveway Cut Restoration - Concrete (Measurement & Payment Item #2)

60 SY $ $

3 34 71 00 Driveway Cut Restoration - Asphalt

(Measurement & Payment Item #2)

460 SY $ $

4 32 16 13 Curb/Combination Curb and Gutter (Measurement & Payment Item #3)

2,500 LF $ $

5 32 16 13 Sidewalk Restoration (Measurement & Payment Item #4)

4,500 SY $ $

6 33 05 23.16 Steel Casing, Bore & Jack Installation, 36” Dia.

(Measurement & Payment Item #5)

235 LF $ $

7 33 05 23.16 Steel Casing, Bore & Jack Installation, 48” Dia.

(Measurement & Payment Item #5)

265 LF $ $

8 33 05 23.16 Steel Casing, Open Cut, 36” Dia.

(Measurement & Payment Item #5)

150 LF $ $

9 32 92 00 Permanent Seeding (Measurement & Payment Item #7)

6,500 SY $1.50 $ $

10 32 92 00 Sodding (Measurement & Payment Item #8)

9,500 SY $ $

11 32 93 43 Tree Save Barrier Fence (Measurement & Payment Item #9)

4,000 LF $1.80 $ $

12 31 41 16.10 Traffic Control - Devices (Measurement & Payment Item #11a)

1 LS $ $

13 31 25 00 Erosion and Sediment Controls - Hay

Bales (Sd1) (Measurement & Payment

Item #12b)

160 EA $8.00 $ $

14 31 25 00 Erosion and Sediment Controls –

Temp Silt Fence C (Sd1) (Measurement

& Payment Item #12d)

9,500 LF $2.50 $ $

R18 Addendum #4

BID DATE: SEPTEMBER 21, 2023

COMPANY NAME:

BIDDER’S SIGNATURE:

R19

BID SCHEDULE CONTINUED

BID

ITEM

NO.

SPEC.

SECTION

DESCRIPTION EST. QTY

MINIMUM

PRICE

UNIT PRICE

EXTENDED

PRICE

15 31 25 00 Erosion and Sediment Controls –

Slope Stabilization (Ss) (Measurement

& Payment Item #12f)

1,000 SY $ $

16 31 25 00 Erosion and Sediment Controls – RipRap (St) (Measurement & Payment Item #12h)

25 SY $45.00 $ $

17 31 25 00 Erosion and Sediment Controls – Mulch (Ds1) (Measurement & Payment Item #12i)

10 TN $ $

18 31 25 00 Erosion and Sediment Controls – Temp Seeding (Ds2) (Measurement & Payment Item #12j)

16,000 SY $0.90 $ $

19 02 42 11 Site Restoration and Cleanup (Measurement & Payment Item #13)

1 LS $ $

20 01 78 39 Project Record Drawings (Measurement & Payment Item #14)

1 LS $ $

21 33 31 00 Sanitary Utility Sewerage Piping – 6”

Diameter DIP (House Connections)

(Measurement & Payment Item #27b)

65 LF

22 33 31 00 Sanitary Utility Sewerage Piping, – 24”

Diameter DIP, PC 200 (Measurement

& Payment Item #28)

1,996 LF

33 31 00

Sanitary Utility Sewerage Piping, – 24” Diameter DIP, PC 200, Ceramic Epoxy Line (Measurement & Payment Item #28)

655 LF

24 33 31 00 Sanitary Utility Sewerage Piping (FM)

– 16” Diameter DIP, PC 350 (Measurement & Payment Item #29a)

4,395 LF $ $

33 31 00

Sanitary Utility Sewerage Piping (FM) – 16” Diameter DIP, PC 350, Ceramic Epoxy Lined (Measurement & Payment Item #29a)

2,705 LF

26 33 34 16

Sanitary Utility Sewerage Piping (FM)

– Plug Valve (Measurement & Payment Item #29c)

3 EA $ $

27 33 05 16.13 Standard Manhole, 48”, Dia.

(Measurement & Payment Item #31a) 80 VF $ $

28 33 05 16.13 Polymer Concrete Manhole, 48” Dia.

(Measurement & Payment Item #31a) 50 VF $ $

29 33 05 16.13

Large Manhole Base, 60” Dia. With Transition Slab

(Measurement & Payment Item #31b)

10 EA $ $

Addendum #4

BID DATE: SEPTEMBER 21, 2023

COMPANY NAME:

BIDDER’S SIGNATURE:

R20

BID SCHEDULE CONTINUED

BID

ITEM

NO.

SPEC.

SECTION

DESCRIPTION EST. QTY

MINIMUM

PRICE

UNIT PRICE EXTENDED

PRICE

30 33 05 16.13 Large Manhole Base, 60” Dia. With

Transition Slab,- Polymer Concrete

(Measurement & Payment Item #31b)

5 EA $ $

31 33 05 16.13 Large Manhole Base, 72” Dia. With Transition Slab (Measurement & Payment Item #31b)

2 EA $ $

32 33 05 16.13

Large Manhole Base, 72” Dia. With

Transition Slab – Polymer Concrete

(Measurement & Payment Item #34)

1 EA $ $

33 33 05 16.13 Manhole Frame and Cover – Traffic Rated Type (Measurement & Payment Item #31c)

18 EA $ $

34 33 05 16.13 Manhole Core, 24” (Measurement & Payment Item #31e) 1 EA $ $

35 33 01 30.71 Manhole Invert Rehabilitation (Measurement & Payment Item #32) 1 EA $ $

36 33 34 16 Air/Vacuum Valve Assembly – 2” (New Installation) (Measurement & Payment Item #35)

2 EA $ $

37 A-01 22 15.11 Rock Removal – Trench Rock (SUP#1) 1,200 CY $ $

38 A-01 22 15.11 Wetlands, Stream Banks and Stream Buffer Restoration (SUP#2)

1LS $ $

39 A-01 22 15.11 Temporary Stream Crossings (Sr)

(SUP#3)

1 LS $ $

40 A-01 22 15.11 Exterior Manhole Joint Wrap (SUP#4) 1,010 LF $ $

41 A-01 22 15.11 Gravel Roadway Repair (SUP#5) 1,600 SY $ $

PART 1 TOTAL $

PART 2 – OWNER DIRECTED ITEMS

42 02 32 19 Exploratory Excavations (Measurement and Payment Item #10 35 EA $270.00 $ $

43 31 41 16.10 Traffic Control – Police Officer (Measurement & Payment Item #11b)

1,000 HR $55.00 $55.00 $55,000.00

PART 2 TOTAL $

OVERALL TOTAL (PART 1 + PART 2) $

Addendum #4

F:\DOCUMENT\22\104 - Little Suwanee Creek Pump Station and Force Main Project\05_BID PHASE\Plan Holder List_Little Suwanee Creek.doc

PLAN HOLDER LIST

Gwinnett County

Little Suwanee Creek Gravity Sewer Force Main Project PPI Project No. E22-104

BID DATE: 9/21/2023 @ 2:50 PM revised New BID DATE: 10/31/2023 revised New BID DATE: 11/21/2023

PRE-BID CONFERENCE: 9/7/2023 @ 10 AM

Questions Deadline: 9/14/2023 @ 3 PM revised to 10/19/2023 to Brittany.Bryant@gwinnettcounty.com

CONTRACTORS

JDS, Inc.

Lawrenceville, GA 30046 Melissa Montgomery mmontgomery@jdspipe.com sarcher@jdspipe.com

Mid-South Builders, Inc.

Lithonia, GA 30017 Ben Weaver ben@mid-southbuildersinc.com

Dickerson Group, Inc.

Lawrenceville, GA 30043 Scott King Scott.king@dickersongroup.net Jason.freeland@dicersongroup.net

RDJE, Inc.

Newnan, GA 30263 Amanda Contracts@rdjeinc.com

Cleary Construction, Inc.

Tompkinsville, KY 42167 Leigh Bryant estimating@clearyconst.com

Site Engineering, Inc.

Atlanta, GA 30340 Tamara Isbell tamara@siteengineeringinc.com

Strack, Inc.

Fairburn, GA 30213 Sylvia Davis sylviad@strackinc.com timd@starckinc.com

Plan Room

ConstructConnect Rye Jumauad Rey.jumuad@constructconnect.com

Dodge Construction Network Darlene Baker-Mann Darlene.baker-mann@construction.com mailto:Brittany.Bryant@gwinnettcounty.com mailto:mmontgomery@jdspipe.com mailto:sarcher@jdspipe.com mailto:ben@mid-southbuildersinc.com mailto:Scott.king@dickersongroup.net mailto:Jason.freeland@dicersongroup.net mailto:Contracts@rdjeinc.com mailto:estimating@clearyconst.com mailto:tamara@siteengineeringinc.com mailto:sylviad@strackinc.com mailto:timd@starckinc.com mailto:Rey.jumuad@constructconnect.com mailto:Darlene.baker-mann@construction.com

Gwinnett County Department of Water Resources Sanitary Utility Sewerage Valves Standard Pump Station Specifications 33 34 16-1 REV ADD 4

SECTION 33 34 16

SANITARY UTILITY SEWERAGE VALVES

PART 1 GENERAL

SUMMARY

A. Section Includes

Paragraph Title

1.2 Submittals

1.3 Quality Assurance

1.4 Delivery, Storage, and Handling

1.5 Warranty

2.1 General

2.2 Plug Valves

2.3 Stainless Steel Plug Valves

2.4 Ball Valves

2.5 Swing Check Valves

2.6 Sewage Air Release Valves

2.7 Extension Stems

2.8 Floor Stands

2.9 Valve Boxes

2.10 Manual Valve Operators

2.11 Electric Valve Actuators

2.12 Painting

2.13 Shop Testing

3.1 Installation

3.2 Shop and Field Testing

B. Scope

The work covered by this section includes furnishing all labor, materials, and equipment required to install, test, and place into satisfactory operation all sewerage valves and valve appurtenances as shown on the Drawings and/or specified herein.

SUBMITTALS

A. Action Submittals/Informational Submittals

Product Data Product data sheets for each make and model. Indicate valve type number, applicable tag number, and facility name/number or service where used.

Complete catalog information, descriptive literature, specifications, and identification of materials of construction.

Sanitary Utility Sewerage Valves Gwinnett County Department of Water Resources 33 34 16-2 REV ADD 4 Standard Pump Station Specifications

For each power actuator provided, manufacturer’s standard data sheet, with application specific features and options clearly identified.

Sizing calculations for open-close/throttling and modulating valves.

Shop Drawings Power and control wiring diagrams, including terminals and numbers.

Certificates Manufacturer’s certificate of compliance.

Test and Evaluation Reports Shop testing reports.

B. Closeout Submittals

Operation and Maintenance Data Complete operation and maintenance manuals in accordance with Section 01 78 23

– Operating and Maintenance Data.

Warranty Documentation Copy of manufacturer’s warranty on company letter specifically indicating

Owner’s warranty coverage.

QUALITY ASSURANCE

A. Qualifications

Manufacturers Valves and equipment furnished under this section shall be the product of firms regularly engaged in the design and manufacture of such equipment for a minimum of five (5) years.

Installers/Applicators/Erectors Have installation, calibration and testing of valves and equipment furnished under this section performed by qualified, skilled technicians who are regularly engaged in such activities involving systems of similar complexity, and who possess all licenses and certificates required to perform such work.

B. Certifications

Furnish a written certification to the Engineer that all valves comply with all applicable requirements of the governing AWWA standards specified herein.

DELIVERY, STORAGE, AND HANDLING

A. Delivery and Acceptance Requirements

Complete drain valves prior to delivery.

Protect ends of flanged and mechanical joint valves with full size wooden baffles securely bolted to the valve ends. Make the baffle size at least equal to the outside diameter of the flange.

B. Storage and Handling Requirements

Secure valves sized 24-inch and larger to wooden skids to facilitate handling and storage.

WARRANTY

Standard Pump Station Specifications 33 34 16-3 REV ADD 4

A. Manufacturer Warranty

Provide a warranty against defective or deficient equipment, workmanship and materials for a period of five (5) years under normal use, operation and service.

Provide the warranty in printed form and apply to all similar units.

PART 2 PRODUCTS

GENERAL

A. Note that all valves, especially in the smaller sizes, are not necessarily shown completely on the drawings, which are more or less schematic. However, Furnish and install all valves indicated or required for proper operation of the equipment or services requiring such valves.

B. Coordinate the location and position of valve operators. Clearly show the operator position for each valve in the shop drawings.

C. Cast the word “OPEN”, an arrow indicating the direction to open, and flow direction arrows on each valve body.

PLUG VALVES

A. Plugs shall be solid one piece, Cast Iron ASTM A126 Class B or Ductile Iron ASTM A536 Grade 65-45-12. The plug shall have a cylindrical seating surface eccentrically offset from the center of the shaft. Plug shall not contact the seat until at least 90% closed. Resilient plug facing shall be Chloroprene (CR). Spherical shaped plugs are not acceptable.

B. Bodies and covers shall be Cast Iron ASTM A126 Class B or ASTM A536 Grade 65-45-

12. Ports shall be rectangular and 100% Port. The valve port area shall meet or exceed standard pipe area per ASME/ANSI B36.10M. Round ports are not acceptable. Bearings shall be sleeve type and made of sintered, oil impregnated permanently lubricated type 316 stainless steel for sizes 4-18” (100-450mm) and ASTM A743 Grade CF8M for sizes 20- 36” (500-900mm). In valves larger than 36” (900mm), the upper and lower plug journals shall be fitted with ASTM A240 type 316 stainless sleeves with body bearings of ASTM B30, Alloy C95400 aluminum bronze. Plug valves used for isolation of Air/Vacuum Release valves shall be all stainless steel construction (Type 316) for bodies and operators.

C. Seats on shall be 1/8” thick welded overlay of not less than 95% pure nickel. Seat shall be at least 1/2” wide, 1/8” thick through entire width and raised. The raised surface shall be completely covered with nickel to ensure that the resilient plug face contacts only the nickel seat.

D. Adjustable packing shall be Acrylonitrile-Butadiene (NBR) multiple V-ring type, with a packing gland follower. Packing gland shall permit inspection, adjustment or complete replacement of packing without disturbing any part of the valve or actuator assembly, except the gland follower. Non-adjustable packing or packing requiring actuator removal to replace the packing, is not acceptable.

E. Pressure ratings shall be 175 psi (1210 kPa) on valve sizes through 12" (300mm) and 150 psi (1035 kPa) for 14" (350mm) and larger. Every valve shall be given a certified hydrostatic shell test and seat test, with test reports being available upon request. For specific installation locations where the Total Dynamic Head (TDH) plus the surge pressure exceeds the minimum pressure ratings above, provide Class 250 flat face flanged ends and a 400 psi (for 3-inch to 12-inch valves) or 300 psi (for 14-inch and larger valves) valve body.

F. Install plug valves and operators according to the manufacturer’s recommendations for conveying fluids with high solids concentrations. For horizontal installations, install plug valves so that the plug face is pointing upwards when the valve is open and so that the plug

33 34 16-4 REV ADD 4 Standard Pump Station Specifications face is facing the pump when the valve is closed. For vertical installations, install plug valves so the plug face is pointing to the side when the valve is open and so that the plug face is pointing upwards when the valve is closed. For plug valves installed in vaults or below grade, install all plug valves horizontally with right angle operators pointing up to allow operation from grade.

G. Provide manual lever operators on above-ground valves 6 inches in diameter and smaller, unless otherwise specified or noted on the Drawings. Provide manual hand wheel operated, through totally enclosed worm gear actuators on above ground valves 8-inches in diameter and larger, unless otherwise specified or shown on the Drawings. Equip manual operators for plug valves mounted above 6 feet from the operating floor with worm gear actuators, chain wheel, and operating chain. Provide all buried valves with totally enclosed worm gear actuators, 2-inch square AWWA operating nuts, and valve boxes. Provide all valves with mechanical travel stops for the open and closed positions, which provide 90 degree rotation from fully open to fully shut. Design gear actuators to produce the required operating torque with a maximum rim pull of 80 pounds on a hand wheel/chain wheel and with a maximum input of 150 foot-pounds on 2-inch operating nuts. Design actuator components between the input and the open and closed position stops to withstand, without damage, a rim pull of 200 pounds for hand wheels/chain wheels and an input torque of 300 foot-pounds for 2-inch operating nuts.

H. Directly cast or provide valves with corrosion-resistant nameplate stating, at a minimum, the valve serial number, manufacturer, size, maximum shutoff pressure, and design pressure rating. Clearly indicate the seat end on the valve exterior relative to half of the body containing the plug/seat interface.

I. Submit certified Shop Drawings showing the principal dimensions, construction, and materials used for all parts of the valve and actuator; clearly indicate the minimum dimensions encountered within the valve port when the plug valve is fully open. Certify that the plug valve(s) furnished are capable of operating in continuous duty service under the pressure and flow conditions at each installation location. Prior to valve shipment, provide written affidavit to the Engineer and Owner attesting the plug valve(s) furnished comply with the requirements of the Contract Documents, comply with the applicable portions of ANSI/AWWA C517-05, and match what is shown on the Shop Drawings.

Hydrostatically test each valve and test for bubble tightness at the factory after the operator has been mounted and adjusted. Provided written certification of test conformance to Engineer and Owner prior to valve shipment.

J. Shop paint all internal and external ferrous components and surfaces of the valves, with the exception of stainless steel and finished or bearing surfaces, with two (2) coats (10 mils minimum dry film thickness) of the manufacturer’s premium epoxy for corrosion resistance. Repair damaged surfaces in accordance with the manufacturer’s recommendations.

K. Manufactures

DeZurik.

Val-Matic.

Henry Pratt.

Engineer approved equal.

STAINLESS STEEL PLUG VALVES

A. General

Provide plug valves of the non-lubricated, resilient-seated, eccentric valve design.

Only use new materials. Compose plug valve body and cover of Type 316 Stainless

Standard Pump Station Specifications 33 34 16-5 REV ADD 4

Steel in conformance with ASTM A351. Provide ANSI 150 flat face flanged ends, at a minimum, conforming to ANSI B16.1 or ANSI/AWWA C110/A21.10 on all exposed valves measuring 2 inches in diameter and larger.

Minimum Valve Body Pressure Rating:

Valves measuring 3 inches to 12 inches in diameter: 275 psig.

For plug valves with 275 psi bodies and ANSI 150 flat face flanges provide valve with the following face to face dimensions.

Nominal Valve Diameter (inches)

Lay Length (inches)

2 7.0 3 8.0 4 9.0 6 10.5

B. Provide a solid one-piece casting plug composed of Type 316 Stainless Steel. Compose seats of UHMW Polyethylene with Type 316 Stainless Steel thrust ring.

C. Provide plug valves with a 100% port area using the nominal pipe diameter as the basis of measurement. Port area is the minimum cross-sectional area within the valve perpendicular to the flow, expressed in square inches.

D. Provide a self-adjusting stem seal composed of Type 316 stainless steel. Provide stem seals that are self-adjusting and repackable without removing the valve from the line.

E. Install plug valves and operators according to the manufacturer’s recommendations for conveying fluids with high solids concentrations. For horizontal installations, install plug valves so that the plug face is pointing upwards when the valve is open and so that the plug face is facing the pump when the valve is closed. For vertical installations, install plug valves so the plug face is pointing to the side when the valve is open and so that the plug face is pointing upwards when the valve is closed. For plug valves installed in vaults or below grade, install all plug valves horizontally with right angle operators pointing up to allow operation from grade.

F. Provide manual lever operators on above-ground valves 6 inches in diameter and smaller, unless otherwise specified or noted on the Drawings. Provide manual hand wheel operated, through totally enclosed worm gear actuators on above ground valves 8-inches in diameter and larger, unless otherwise specified or shown on the Drawings. Provide all valves with mechanical travel stops for the open and closed positions, which provide 90 degree rotation from fully open to fully shut. Design gear actuators to produce the required operating torque with a maximum rim pull of 80 pounds on a hand wheel/chain wheel and with a maximum input of 150 foot-pounds on 2-inch operating nuts. Design actuator components between the input and the open and closed position stops to withstand, without damage, a rim pull of 200 pounds for hand wheels/chain wheels and an input torque of 300 foot-pounds for 2-inch operating nuts.

G. Directly cast or provide valves with corrosion-resistant nameplate stating, at a minimum, the valve serial number, manufacturer, size, maximum shutoff pressure, and design pressure rating. Clearly indicate the seat end on the valve exterior relative to half of the body containing the plug/seat interface.

H. Submit certified Shop Drawings showing the principal dimensions, construction, and materials used for all parts of the valve and actuator; clearly indicate the minimum dimensions encountered within the valve port when the plug valve is fully open. Certify that the plug valve(s) furnished are capable of operating in continuous duty service under the pressure and flow conditions at each installation location. Prior to valve shipment, provide written affidavit to the Engineer and Owner attesting the plug valve(s) furnished

33 34 16-6 REV ADD 4 Standard Pump Station Specifications comply with the requirements of the Contract Documents and match what is shown on the Shop Drawings. Hydrostatically test each valve and test for bubble tightness at the factory after the operator has been mounted and adjusted. Provided written certification of test conformance to Engineer and Owner prior to valve shipment.

I. Manufactures

Henry Pratt.

DeZurik.

Southern Manufacturing Group, Inc.

Engineer approved equal.

BALL VALVES

A. Small Ball Valves (3” and Smaller)

General Unless otherwise specified, provide quarter-turn type small ball valves with full pipe size opening through the valve. Provide valves suitable for a differential working pressure in either direction of not less than 400 PSI.

Manufacturers

Apollo 70-100 Series.

Engineer approved equal.

Construction Unless otherwise specified or required, small ball valves shall have brass body, self-aligning Type 316 stainless steel ball, blow-out proof Type 316 stainless steel stem, reinforced Teflon seats and seals, plastic-coated Type 304 stainless steel handle, and threaded ends per ANSI B2.1.

B. Large Ball Valves (4” and Larger)

General Provide metal to metal seated ball valves with flanged ends, drilled to the applicable ANSI B16.1 standard Class 125/150, as required. Valve shall have a clear unobstructed waterway, which will result in no significant head loss, when the valve is in the full open position.

The valve shall be drop tight and meet or exceed the AWWA C-507-99 inspection and testing standard. The valve shall be single seated, as required and rated at 150 psi.

Manufactures

Henry Pratt Company.

Apco Willamette.

Engineer approved equal.

Elements Body

Construct body of ductile iron ASTM A536 GR 65-45-12 having an inlet and outlet flanged waterway equal to the required valve size. Use flat-faced flanges machined parallel to each other to within .005 inch. Provide valve body with both a drain and vent hole drilled and tapped.

Standard Pump Station Specifications 33 34 16-7 REV ADD 4

Bearings: Bronze, installed in each half of the valve body accurately located in the center of the housing to receive the trunnion bearings on the ball and place the ball in the central position.

Bearing Load: Maximum of 2000 lb/sq. inch at 250 psi differential pressure.

Body Seat: Monel, electronically fused to the base metal, then accurately machined to form the seating seal, or other C507-99 approved materials. The body seat shall not protrude into the waterway.

Ball

Provide a ductile iron ASTM A536 GR 65-45-12 ball with integrally cast trunnions which will be bronze-bushed. One trunnion holds the operating shaft which passes through a packing seal area and connects to the actuator. To prevent leakage around the shaft, the chevron packing is installed to form a seal.

Ball Seat: Type 300 series stainless steel. Pressure assisted design. Fully adjustable and replaceable in the field without removing the valve from the line. Use an offset on the body and ball so that the seats will only be in contact at the actual point of closing. Connect the seat to the ball by means of a stainless steel mounting ring that is securely attached and pinned into position after the correct setting has been attained. Do not use seats threaded directly on to the ball.

The ball seat shall be located at the top, when the valve is in the open position.

Actuator

Provide valve actuators conforming to the operating requirements of AWWA Standard C507-99. Design actuators to hold the valve in any intermediate position between full open and fully closed without creeping or fluttering.

Where indicated, provide electric valve actuators meeting the requirements of this specification.

Materials Ball and Body Trunnion Bearings: Bronze of dissimilar hardness as per AWWA

C507-99 standard to prevent galling or binding. Self-lubricating teflon reinforced are also acceptable.

Shafts: ASTM A564 Type 630, H1150 (17-4PH) stainless steel.

Valve Testing: Subject all ball valves to hydrostatic, shop leakage and performance tests as specified in AWWA Standard C507-99. Maximum seat leakage allowance of 1fl. oz. per diameter inch per hour as per AWWA C507-99 at the operating pressures indicated in the Valve Schedule.

Internal Valve Painting: Shop paint all internal ductile iron surfaces, except finished or bearing surfaces, with two coats of asphalt varnish conforming to Federal Specification TT-C-494, and AWWA C550.

External Valve Painting: Shop paint all exterior steel or cast or ductile iron surfaces of each valve, except finished or bearing surfaces, with one or more coats of Alkyd primer. For buried service valves, two coats of asphalt varnish per Federal Specification TT-C-494.

Service Provide ball valves suitable for low pressure service while maintaining AWWA leakage limits. Available seating pressure may range as shown in the Valve Schedule at the end of this section depending on the operating status of the

33 34 16-8 REV ADD 4 Standard Pump Station Specifications associated pump station and the valve must remain leak tight. On initial pump start-up and shut down, the valve may experience pressures up to the high pressures indicated in the schedule prior to opening and closing and shall maintain AWWA leakage standards.

Certification Conduct factory testing to certify the valve meets the AWWA leakage standards at the design operating pressures listed in the Valve Schedule. Video tape the testing with a copy provided to the Engineer and Owner. Prior to the valve being shipped to the project site, provide a signed certification from the manufacturer stating the valve meets the AWWA leakage requirements.

SWING CHECK VALVES

A. Provide oil cushioned, bottom buffer, swing check valves in sanitary piping that are tight seating, cushioned in operation, suitable for operation in either horizontal or vertical piping, and conform to AWWA C508.

B. Provide flush and drain holes in the body.

C. Provide a bronze seat that is locked in place with stainless steel lock screws. Make the seat field replaceable without the use of special tools.

D. Provide a one-piece stainless steel shaft that extends through both sides of the body with a lever and spring mounted on each side.

E. Provide a ductile iron disc, utilizing a double clevis connected to a ductile iron disc arm.

Provide a replaceable Buna-N disc seat for water tight shut-off. Suspend the disc arm assembly from the stainless steel shaft.

F. Provide a bottom hydraulic (oil cushioned) buffer to permit free open and positive non-slam control closure of the disc. The hydraulic buffer shall make contact with the disc during the last 10% of closure to instantly control the valve disc until shut-off in a manner to prevent slam and water hammer. Provide external adjustment on the buffer so the last 10% of closure can be controlled to suit operating conditions.

G. Materials of Construction

Body/Cover: ASTM A126, Grade B, cast iron.

Disc arm/Disc: ASTM A536, ductile iron.

Seat: ASTM B148 aluminum bronze.

Shaft: ASTM A582, T303 stainless steel.

Disc Seat: Buna-N.

Buffer Cylinder: Steel, per NFPA Standards.

Buffer Rod: ASTM A582, T303 stainless steel.

H. Manufacturers

Val-Matic (Swing Flex)

Dezurik (Apco-Willamette).

GA Industries.

Engineer approved equal.

SEWAGE AIR RELEASE VALVES

A. Manufacturers

Standard Pump Station Specifications 33 34 16-9 REV ADD 4

Vent-O-Mat Series RGX.

Engineer approved equal.

B. Materials

Provide Air Release and Vacuum Relief Valves consisting of a compact tubular all stainless steel fabricated body, hollow direct acting float, and solid large orifice float in H.D.P.E.- stainless steel nozzle and woven dirt inhibitor screen, nitrile rubber seals and natural rubber seat.

Include an integral anti-surge orifice mechanism, which operates automatically to limit surge pressure rise or shock induced by closure to less than 2 times the valve rated working pressure. Provide an intake orifice area equal to the nominal size of the valve (i.e., a 6” valve shall have a 6” intake orifice).

Provide large orifice sealing with the flat face of the control float seating against a nitrile rubber “O” ring housed in a dovetail groove circumferentially surrounding the orifice. Control discharge of pressurized air by the seating and unseating of a small orifice nozzle on a natural rubber seal affixed into the control float. Prevent damage to the rubber seal using a flat seating land surrounding the orifice.

The valve construction shall be proportioned with regard to material strength characteristics, so that deformation, leaking or damage of any kind does not occur by submission to twice the designed working pressure. Provide flanged ends conforming ANSI Class 250 or ANSI Class 300 Standards for the valve inlet connection. Fasten flanged ends with ASTM A193,Grade B8M, 316 stainless steel, heavy hex bolts and ASTM A194, Grade 8M, 316 stainless steel, heavy hex nuts inserted for alignment to the specified size of, nuts, washers, and gaskets.

C. Operation

Prior to the ingress of liquid into the valve chamber, as when the pipeline is being filled, and when sewage/effluent approach velocities are relative to a transient pressure rise, on valve closure, of < 2-times valve rated pressure, vent air through the large orifice.

At higher sewage/effluent velocities, which have a potential to induce transient pressure rises greater than 2-times valve rated pressure on valve closure the automatically discharge air/gas through the anti-shock orifice and reduce sewage/effluent approach velocity, so that on closure a maximum transient pressure rise of less than 2-times valve rated pressure is realized.

Valves shall not exhibit leaks or weeping of liquid past the large orifice seal at operating pressures of 7.3 psi to twice (2) the rated working pressure.

When the valve is closed, discharge accumulated air/gas through the small orifice at any pressures within a specified design range, 7.3 psi to 250 psi. No leakage is allowed in the absence of air.

Valves shall react immediately to pipeline drainage or liquid column separation by the full opening of the large orifice so as to allow unobstructed air intake at the lowest possible negative internal pipeline pressure.

EXTENSION STEMS

A. Provide solid steel extension stems not smaller than the stem of the valve. Connect extension stems to the valve by a flexible socket coupling. All couplings shall be pinned, keyed, or socket type.

33 34 16-10 REV ADD 4 Standard Pump Station Specifications

B. Extend extension stems for buried service valves to within 6” of the top of the valve box or floor box. Provide spacers which will center the stem in the valve box. Provide a standard 2” nut on the top of the extension stem.

C. Provide stem guides that are bronze-bushed, cast iron construction adjustable in two directions. Install stem guides so the unsupported length of the extension stem does not exceed 10 feet or an L/r of 200.

FLOOR STANDS

A. Provide heavy-pattern type floorstands constructed of cast iron or steel with a height of approximately 36 inches. Provide an integral bottom flange suitable for bolting to a concrete floor.

B. Furnish floorstands for manually operated non-rising stem valves with a slot-type position indicator in the floorstand body. Provide a removable stem cover with slot type position indicator for floorstands for rising stem valves. Stem covers shall consist of a galvanized, slotted steel pipe attached to the top of the floorstand with a pointer riding up and down in the slot. Mark the open and closed points on the pipe cover.

C. Provide a bronze operating nut supported by tapered, grease-lubricated roller or ball bearings on floorstands for rising stem valves. Provide positive mechanical seals on the operating nut where it passes through the floorstand housing to retain lubricant and exclude dirt. Provide a lubricating fitting for lubricating bearings.

D. Provide handwheels with a minimum diameter of 14 inches and shall be designed to seat or unseat the valve at the maximum differential with not greater than a 40-pound tangential pull on the handwheel rim. Cast an arrow and the word "OPEN" on the handwheel in raised letters.

E. Provide a conspicuous, permanently attached nameplate showing the valve manufacturer's name, valve size, model designation, serial number, and any other pertinent information on the floorstand. Fabricate the nameplate of corrosion resisting metal with raised or stamped lettering and contrasting background.

F. Set floorstands vertical and plumb with the valve operating stem for free operation without binding or distortion. Shim and grout floorstand in place as required for proper installation.

G. Following manufacture, interior and exterior, non-machined, nonbearing ferrous floorstand surfaces shall be blast-cleaned and painted at the factory with 1 coat of zinc chromate primer conforming to Federal Specification TT-P-645 and 1 coat of compatible alkyd enamel. Protect interior surfaces of floorstands for the life of the unit with a minimum of 3 coats of an approved paint.

VALVE BOXES

A. Provide all buried valves with 3-piece, cast iron, extension sleeve type valve boxes suitable for the depth of cover as shown on the Drawings.

B. Material Characteristics

Minimum Diameter: 5 inches.

Minimum Wall Thickness: 3/16” at any point.

C. Cast thereon an appropriate name designating the service for which the valve is intended on the cover (“W” for water, “S” for sanitary).

D. When installed within a roadway, provide deep locking type covers.

E. Heavily coat all parts of valve boxes, bases, and covers with a suitable bituminous finish.

Standard Pump Station Specifications 33 34 16-11 REV ADD 4

F. Set valves and valve boxes plumb. Place each valve box directly over the valve it serves with the top of the box flush with the finished grade.

MANUAL VALVE OPERATORS

A. Unless otherwise shown or specified, furnish plug valves with manual operators as follows:

Plug valves 8” and smaller that are installed above grade and less than 7 feet above the working surface: Lever operator.

Plug valves greater than 8” that are installed above grade and less than 7 feet above the working surface: Rotary operator with handwheel.

Plug valves located more than 7 feet above the working surface: Rotary operator with chainwheel.

Plug valves 8” and smaller that are installed for buried service: 2” operating nut, extension stem, and valve box.

Plug valves greater than 8” that are installed for buried service: Rotary operator with extension stem, 2” operating nut, and valve box.

B. Operating Nuts for Buried Valves: Standard 2” square nuts conforming to AWWA C500.

Furnish extension stems, valve boxes, and stem guides where shown, specified, or required for proper operation.

C. Hand Lever Operators: Heavy-duty cast iron bracket, cast iron latching lever, and self-lubricating bushings, capable of securing the valve in any position. Install lever operators so that the lever is parallel with the axis of the pipe in which the valve is installed when the valve is fully open.

D. Rotary Manual Operators for Aboveground Service: Worm gear or traveling nut type with a heavy-duty, weatherproof cast iron or steel housing with gasketed, removable cover.

Equip with a mechanical dial or slot type position indicator and suitable hand wheel.

Provide totally enclosed and sealed manual operators to prevent the entrance of rain, dirt, and corrosive atmospheres. Provide traveling nut operators with a grease lubricated alloy steel screw stem, brass nut, and self-lubricating bronze bushings. Provide worm gear operators with hardened, grease-lubricated alloy steel worms and bronze worm gears.

Provide bronze or stainless steel exterior bolts and fasteners for corrosion resistance. The valve shall open with counterclockwise rotation of the handwheel.

E. Rotary Manual Operators for Buried Service: Conform with the paragraph above except, provide totally enclosed and completely sealed operator to prevent the entrance of water and dirt. Coat buried operators with a bituminous coating. Capable of withstanding 300 foot-pounds of torque on the operating nut or hand wheel. Provide a corrosion resistant, dial type valve position indicator at the operating nut on the extension stem of the buried operators to provide a remote indication of valve position.

F. Chain Wheel Operators: Heavy cast iron construction equipped with chain guide and looped, flexible, operating chain. Provide galvanized or cadmium plated chain that extends to with 48-inches of the floor.

G. Provide manual rotary and lever operators capable of seating or unseating the valve disc under the most adverse conditions in the particular application with no more than an 80-pound pull on the handwheel or lever. Provide valve operators capable of holding the valve in any position between fully open and fully closed without creeping or fluttering. Provide operators with adjustable, mechanical, stop-limiting devices to prevent over-travel of the valve disc in the open and closed positions. Comply with all applicable requirements of

AWWA C504.

33 34 16-12 REV ADD 4 Standard Pump Station Specifications

H. Coordinate the location of valve operators. Clearly show operator locations for each valve on the shop drawings.

ELECTRIC VALVE ACTUATORS

A. Provide open/close service or modulating service electric actuators as specified in the Valve Schedule at the end of this Section.

B. Manufacturers

Open/Close (non-modulating) fail-open valve actuators: Beck, Limitorque, Rotork or Engineer approved equal.

Modulating, Failsafe valve actuators: Beck, Limitorque, Rotork or Engineer approved equal.

C. Actuator Sizing

Size the actuator to guarantee valve closure at the specified differential pressure.

Provide sufficient safety margin of motor power available for seating and unseating the valve to ensure torque switch trip at maximum valve torque with the supply voltage 10% below nominal.

D. Motor

The drive shall be furnished with a 460 volt AC, three phase, 60 Hz, synchronous motor. Motor shall be capable of withstanding 60 starts / stops per minute or a temporary stall condition without overheating. Design of the motor shall be such that electrical and thermal overloads are not required.

Motor bearings shall be maintenance-free. Motor shall be non-coasting with instant magnetic braking, and shall be self-locking and selfreleasing without the use of a separate brake winding, mechanical brake or worm gear mechanism. Control drive shall be designed to stay in place upon loss of power and shall be capable of holding a load equal to at least 200% of the model’s rated output without AC power. The drive motor shall be a TENV with Class H insulation.

Drive shall be equipped with a contactless position sensing device and be capable of providing an isolated feedback signal with a 4–20 mA or 1–5 V dc range. The sensing device shall have infinite resolution.

Control drive shall have integrated electronics and be able to operate in ambient temperatures of -40°F. (-40°C.) to 185°F. (85°C.).

Include a device to ensure that the motor runs with the correct rotation for the required direction of valve travel with either phase sequence of the three-phase power supply connected to the actuator.

E. Failsafe Operation

For valves requiring failsafe operation, provide an actuator with a battery backup power source, to ensure, that in the event of a main power supply loss or failure, the valve can respond, as user configured, to automatically open, automatically close, or stay in last position waiting for local or remote control command within a 30 minute period of power loss. Provide a display on the battery backup power source to indicate battery status.

Independent of power loss, the actuator shall be able to ensure that the valve can respond as user configured, to automatically open, automatically close, or stay in last position, in the event the process control input signal is lost.

F. Hand Operation

Standard Pump Station Specifications 33 34 16-13 REV ADD 4

A low-speed, disc-type motor Handwheel shall permit manual operation of the drive without electrical power and without a declutching mechanism

G. Toque and Turn Limitations

Control drive shall be rated for the torque output required for the specific valve or gate application. Stall torque shall be self-limiting, not exceeding two and one half times the rated torque; torque switches shall not be required. Drive shall operate as required for the specific valve application on increasing signal, with timing of up to 60 seconds for 100° rotation. Gear train shall have high efficiency spur gears constructed of heat treated alloy steel or ductile iron only. Readily available gear modules shall provide for a range of torque and timing combinations within the drive’s rated capacity and shall be field interchangeable. Drive train parts shall be lubricated with a premium, heavy-duty lithium-based lubricant. No oil baths shall be used for lubrication. Control drives shall be able to operate in any mounting orientation.

Two SPDT over-travel limit switches shall be provided for over-travel protection. In addition, the drive shall have four auxiliary SPDT switches which are infinitely adjustable over the full range of travel. Switches shall be rated for 6 amps at 120 volts AC. Drive shall have integral mechanical stops capable of limiting travel of the drive and load.

H. Local Operation

A five-position, drive-mounted electric Handswitch shall be provided to permit local electrical operation of the unit for control adjustment or operation on loss of control signal. With the Handswitch in AUTO mode, drives shall respond to control signals automatically.

I. Control Facilities

Drive shall provide modulating control through an integral, digital control module which positions the drive in proportion to the 4-20 mA range control input signal.

The control module shall be capable of initiating shaft movement in steps down to 0.1°.

Upon loss of input signal, the drive shall be field configurable to move to any predetermined position.

Standard control features should include:

Field-configurable, pre-determined action upon loss of input signal Stall protection Split signal operation for control of multiple drives External position feedback signal

J. Enclosure

Design the actuators for indoor and outdoor service and capable of mounting in any position.

Enclosure shall be totally enclosed, cast, weatherproof, dust-tight, NEMA 4X construction. All field connections shall be made in one terminal compartment.

Separate conduit entrances shall be available for power and control wiring.

K. Start-up Kit

Supply each actuator with a start-up kit comprising installation instruction manual, electrical wiring diagram and cover screws and seals to make good any site losses during the commissioning period. In addition, supply sufficient actuator

33 34 16-14 REV ADD 4 Standard Pump Station Specifications commissioning tools to enable actuator set up and adjustment during valve/actuator testing and site installation commissioning.

L. Performance Test Certificate

Performance test each actuator and supply individual test certificates, free of charge.

The test equipment should simulate a typical valve load, and the following parameters should be recorded.

Current at maximum torque setting Torque at max. torque setting Flash test voltage Actuator output speed or operating time.

In addition, the test certificate should record details of specification such as gear ratios for both manual and automatic and second stage gearing if provided, drive closing direction, and wiring diagram number.

M. Warranty

Warrant each actuator for a minimum of 24 months of operation up to a maximum of 36 months from shipment.

PAINTING

A. Shop paint all internal cast or ductile iron surfaces, except finished or bearing surfaces, with two coats of asphalt varnish conforming to Federal Specification TT-C-494.

B. Shop paint all exterior steel or cast or ductile iron surfaces of each valve, except finished or bearing surfaces, in accordance with Section 09 91 00 – Painting.

C. Field prime and paint all exposed valves in accordance with the requirements of Section 09 91 00 – Painting.

SHOP…