RSA Town of Madison WTP ARPA Improvement Project_Addendum No.1.pdf

ADDENDUM No. 1 for the

Town of Madison WTP ARPA Improvements Project

Prepared For

Rapidan Service Authority 11235 Spotswood Trail Ruckersville, VA 22968

Prepared by C. Robert L. Mangrum, P.E., BCEE

Mangrum Consulting & Design 1500 Clayton Avenue Lynchburg, VA 24503

Addendum Date: June 28, 2023

This Addendum No. 1, dated June 28, 2023 amends or supplements the Contract Documents titled Town of Madison WTP ARPA Improvements Project Dated June 5, 2023 as indicated below:

Changes to Drawings:

Item 1: Drawing D-002 Note F, delete item 1 and replace with: “All butterfly valves shall be Bray wafer style with cast iron body, nylon coated disc, EPDM seat and shaft seal.

Manually controlled butterfly valves shall have lever or gear operated handwheel actuators. Automatic butterfly valves have double acting, weatherproof electric actuators manufactured by Bray that employ spring assisted closure for normally closed under power loss conditions.”

Item 2: Drawing D-002 Note K, add the following: “1g. All electric actuators for butterfly valves shall employ spring assisted closure for normally closed under power loss conditions.”

Item 3: Add the following to Drawing D-004, “H. The work shown on Sheet D-102

(EXISTING FILTER BUILDING BASEMENT AND NEW PIPE GALLERY PLAN

SEQUENCE 1) represents the first step of contract work to be performed in a two-stage construction sequence resulting from constraints required to keep the existing plant operational. Sheet D-103 (EXISTING FILTER BUILDING BASEMENT AND NEW PIPE GALLERY PLAN SEQUENCE 2) represents the second step of contract work to be performed in the existing filter basement. All work shown on D-102 (Sequence 1) AND all associated and related work (eg. electrical, I&C, mechanical, etc.) shown elsewhere in the contract documents shall be deemed substantially complete by Owner in accordance with the contract documents prior to commencing with any work shown on D-103 or any associated work (eg. electrical, I&C, mechanical, etc.) pertaining to or associated with the work on D-103. The existing filter shall remain in service and fully functional until Owner provides written authorization for it to be removed from service to facilitate sequence 2 work in the existing filter building basement.”

Item 4: Add the following Drawing D-004, “I. Contractor shall provide Owner written notice at least 7-days in advance of any requested plant shut down(s) as required to perform contract work. Upon approval by the Owner, the maximum duration of any single shutdown shall not exceed 3.0 consecutive calendar days (72 consecutive hours).”

Item 5: Drawing D-102, delete note 31 and replace with: “Furnish and install three (3) wall mounted turbidity meters, HF Scientific MTOL+ EPA model with 120V power and 4- 20 mA output. Tap raw water process pipe, tap settled water/filter 1 influent process pipe and tap filter effluent process pipe each with ½” saddle tap and stainless steel ball valve. Connect each turbidity meter to corresponding ball valve using ¼” PE tubing.

Route each turbidity meter unit drain to nearest floor drain using ¼” PE tubing.”

Item 6: Drawing D-104, delete Note 17 and replace with: “Furnish and install a wall mounted turbidity meter, HF Scientific MTOL+ EPA model with 120V power and 4-20 mA output. Tap filter 2 effluent process pipe with ½” saddle tap and stainless steel ball valve. Connect turbidity meter to ball valve using ¼” PE tubing. Route turbidity meter unit drain to nearest floor drain using ¼” PE tubing.”

Item 7: Drawing D-104, add the following note: “18: Furnish and install a wall mounted turbidity meter, HF Scientific MTOL+ EPA model with 120V power and 4-20 mA output.

Tap settled water/filter 2 influent process pipe with ½” saddle tap and stainless steel ball valve. Connect turbidity meter to ball valve using ¼” PE tubing. Route turbidity meter unit drain to nearest floor drain using ¼” PE tubing.”

Item 8A: Drawing M-101, delete note 9 and replace with “36"w x 48"h Vinyl normal opening window, low E-366 with argon.”

Item 8B: Drawing M-101, delete note 10 and replace with “36"w x 48"h Vinyl normal opening window, low E-366 frosted privacy glass with argon.”

Item 9: Drawing M-102 add the general note: “D. Utility sink and tankless water heater to be located on south wall near future booster pump discharge pipe floor penetration.”

Item 10: Add the following to Drawing E-001, “27. Conduits for instrumentation and control wiring have not been shown in the contract documents. Drawing E-603 provides an itemization of all Digital and Analog signals for each instrument and indicates where the wiring shall be terminated/landed. Digital and Analog signals shall be in separate conduits. Minimum conduit size for digital signals for each instrument shall be ¾”C. The minimum size for analog signals for each instrument shall be ¾”C. See Drawing E-602 (attached to addendum) notes A, B, C and D for additional information.”

Item 11: Drawing E-102, delete Note 12 and replace with: “3/4”C w/2 #12 and 1 #12 GND to PB2 for each of the three (3) turbidity meters referenced in item 5 hereinabove.

Item 12: Drawing E-103, delete Note 4 and replace with: “Future booster pump No.1, 1"C w/ 3 #10 and 1 - #10 GND to PCPRNH.”

Item 13: Drawing E-103, delete Note 5 and replace with: “Future booster pump No.2, 1"C w/ 3 #10 and 1 - #10 GND to PCPRNH.”

Item 14: Drawing E-103, delete Note 16 and replace with: “3/4”C w/2 #12 and 1 #12 GND to PB1.

Item 15: Drawing E-103, add the following: “Note 17. 3/4”C w/2 #12 and 1 #12 GND to PB1 for settled water/filter 2 influent turbidity meter.”

Item 16: Replace Drawing E-601 with the attached updated E-601.

Item 17: Replace Drawing E-602 with the attached updated E-602.

Item 18: Replace Drawing E-603 with the attached updated E-603.

Item 19: Replace Drawing E-604 with the attached updated E-604.

Item 20: See attached “VDH Drain Field Permitting Package” for details for installing new septic tank and drain field at the location shown on Drawing C-101.

Item 21: On Drawing C-101, delete the reference note by new drain field location “SEE NOTE X ON C-502” and replace with: “See VDH Drain field Permitting Package Contained in Addendum No.1.”

Changes to Project Manaual:

None.

Questions & Responses:

Question 1: The specs call for the contractor’s qualification to be submitted within 5 days of submitting bid. The Bid Form notes the qualification is to be submitted with bid. Can the qualifications be submitted after the bid by the low bidder?

Response 1: The contractor’s qualifications can be submitted with the bid or alternatively the qualifications must be provided by the apparent low bidder within five

(5) days of being requested by OWNER after the bid.

Question 2: When is the last day to submit questions?

Response 2: The last date and time to submit questions is 5:00 PM on July 6, 2023.

Question 3: Does AIS or prevailing wage and/or Davis Bacon requirements pertain to this project?

Response 3: No.

Question 4: What brand of electric actuators are needed for the plug valves? Bray electric actuators are mentioned on the butterfly valves but nothing on the plug valves.

Response 4: Electric actuators for plug valves for open/close (FV) service and modulating (FCV) service shall meet requirements specified in Item K on D-002 and shall be Rotork, Limitorque, or AUMA.

Question 5: There’s only one plug valve (#41 on drawing D-102) that calls out that it’s modulating. Are the rest supposed to be open/close? There’s nothing clarifying what they’re supposed to be.

Response 5: Valves with electric actuators identified on the C and D drawings indicate open/close service with the designation “FV” or “open/close” or “Electric Actuated”; for modulating valves identified on C and D drawings, modulating service have the designation of “FCV” or “modulating”. Drawing C-104 (Yard Piping) identifies additional plug valves for the project, both modulating (FCV) and open/close (FV). Drawing E-602 (updated attached) identifies each valve for the project with FV or FCV. Drawing E-604 (Panel Schedule) also identifies all electric actuated valves with FV or FCV.

Attachments Prebid Meeting Attendee List Drawing E-601 Drawing E-602 Drawing E-603 Drawing E-604 VDH Drain Field Permitting Package

END OF ADDENDUM NO. 1

PREBID MEETING ATTENDEE LIST

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UPDATED DRAWINGS

480 / 277Y / 3Ø / 60 Hz / 4W UG Utility Power Service

CT Cabinet

Meter Base

4” C w/4 – 350KCMIL (2 Sets)

4” C w/4 – 350KCMIL (2 Sets)

Utility Service Entrance Main Breaker Disconnect (MBD) 600 A 480 / 277Y / 3Ø / 60 Hz

Ground BUS

Neutral BUS 1/0 BCSD

1/0 BCSD

16' Min.

Future ATS

600 A

Mounted 1st Floor New Filter Building

Distribution Panel Board Filter Building (FBPB) 480 / 277Y / 3Ø / 60 Hz 346 FLA Connected 249 FLA Running Main Breaker 600 A Min. SSCR 65k AIC

4” C w/4 – 350KCMIL

& 1-1/0 GND (2 SETS)

/ 3P

30 Backwash Pump 1 1.5” C w/3 – #4

&1 - #4 GND

Manufacturer Supplied Wall Mounted on SS Unistrut at Front of New Sed Basin

Sludge Removal System Control Panel (SRCP) 120V / 1Ø / 60 Hz

5 FLA

Main Breaker 20 A

HMI

PLC

Sludge Collector Drive 0.25 VFD

30 A / 3P

3/4”C w/2 – #10

&1 - #10 GND

1” C w/3 – #12

&1 - #12 GND

/ 3P

200 A / 3P

Space

Instrumentation Controls Sub-Contractor Supplied Floor or Wall Mounted 1st Floor New Filter Building

Process Control Panel & Remote Network Head (PCPRNH) 480 / 277Y / 3Ø / 60 Hz 155 FLA Connected 122 FLA Running Main Breaker 200 A

3”C w/4 – #3/0

&1 - #1 GND

R em ot e

N et w or k H ea d

Fu tu re

Fu tu re

Fu tu re

VF

D

VF

D

Lo ad

R ea ct or

Future 7.5

HP VFD

Booster No.1

Future 7.5

HP VFD

Booster No.2

0.5 Floc Mixer No.1

0.5 Floc Mixer No.2

NF 3P

Disconnect

NF 3P

Disconnect

NF 3P

Disconnect

1” C w/3 – #12

&1 - #12 GND

1” C w/3 – #12

&1 - #12 GND

Lo ad

R ea ct or

Motor Starter

& OL

Protection

Motor Starter

& OL

Protection

NF 3P

Disconnect 30 High Service Pump No.1 (existing dual voltage motor)

NF 3P

Disconnect

30 High Service Pump No.2 (existing dual voltage motor)

1.5” C w/3 – #4

&1 - #4 GND

HOA

Hand

OPEN

Hand

CLOSE

New Filter Influent Valve New Filter Drain Valve New Filter Backwash Valve New Filter Air Scour Valve

Ex. Filter Influent Valve Ex. Filter Drain Valve Ex. Filter Backwash Valve Ex. Filter Air Scour Valve Ex. Filter Influent Valve 2

New Sed Basin Sludge Valve

HOA

Hand

ON

Hand

OFF

High Service Pump No.1

High Service Pump No.2

Raw Water Pump No.1 Raw Water Pump No.2

Backwash Pump No.1

Remote Display

Remote Display

60 A / 3P Manufacturer Supplied Integrally Mounted to Blower

Air Scour Backwash Blower Control Panel (ASBBCP) 480 V / 277Y / 3Ø / 60 Hz

50 FLA

HMI

120V - Controls

Air Scour Backwash Blower

1.5” C w/4 – # 6

&1 - #6 GND

Fused 3P Disconnect

HOA

Ex. Raw Water Influent Valve Train 1 Influent Valve Train 2 Influent Valve

New Filter Effluent Valve Filter Backwash Control Valve New Filter Filter-To-Waste Valve

Ex. Filter Effluent Valve Ex. Filter Filter-To-Waste Valve

Hand Potentiometer

16" HMI

75 A / 3P

75 A / 3P 1.5” C w/4 – #4

&1 - #6 GND

Wall Mounted Beside PB1 (1st Floor New Filter Bldg.)

45 KVA

54 FLA HV

125 FLA LV

480 V / 208Y / 3Ø / 4W / 60 Hz

TX

3” C w /4

1/

&1

#4 G

N D

Wall Mounted 1st Floor New Filter Building

/ 3P

Space

/ 3P Space

/ 3P Space

/ 3P Space

/ 3P Space

/ 3P

Space

/ 3P

Space

/ 3P

30 / 3P

Space

1”C w/4 – #10

&1 - #10 GND

Wall Mounted Near FBPB 1st Floor of New Filter Building

15 KVA

18 FLA HV

36 FLA LV

480 V / 240 / 3Ø / 4W / 60 Hz

TX

1.

5”

C w

/4

&1

#6 G

N D

JB w/Tap; Wall Mounted in Basement of Ex. Filter Bldg.1.5” C w/4 – #6

&1 - #6 GND5 HP Starter

& OL

240V 3Ø

JB

5 HP Starter

& OL

240V 3Ø

To Raw Water

Pump 2

JB

1.

5”

C w

/4

&1

#6 G

N D

Ethernet - Fiber Switch

3/4"C w/1 Fiber Cable (Ethernet IP) Ethernet - Panel SRCP at New Sedimentation BasinFiber Switch

4” C w/4 – 350KCMIL

&1 - 1-1/0 GND (2 SETS)

Junction Box in Basement of Existing Filter Building for Future Generator Connection

Motor Starter

& OL

Protection

1.5” C w/3 – #4

&1 - #4 GND

SCADA Cabinet in Office Ethernet - 2nd Floor New Filter Bldg.3/4"C w/3 Ethernet Cables Fiber Switch

PB1

208Y / 3Ø / 60 Hz Main Breaker 125 A

See Panel Schedule

Space

Wall Mounted Basement in Ex.

Filter Bldg

Wall Mounted Basement in Ex.

Filter Bldg

Wall Mounted Basement in Ex.

Filter Bldg

Wall Mounted Basement in Ex.

Filter Bldg To Raw Water Pump1

To Be Wall Mounted Near Main Breaker Disconnect

Motor Heater

NF 3P

Disconnect

Wall Mounted Basement Ex. Filter Building

PB2

208Y / 3Ø / 60 Hz Main Breaker 125 A

See Panel Schedule

3” C w/4 – #1/0 &1 - #4 GNDManufacturer Supplied

Wall Mounted Basement Ex. Filter Bldg.

Backwash Pump Control Valve Panel (BWPCVP) 120V / 1Ø / 60 Hz

10 FLA

Main Breaker 20 A

HMI

3/4”C w/2 – #10

&1 - #10 GND

NF 1P

Disconnect

NF 1P

Disconnect

PLC

1.

5”

C w

/4

&1

#6 G

N D

Wall Mounted Beside PB2 (Basement Ex. Filter Bldg.)

45 KVA

54 FLA HV

125 FLA LV

480 V / 208Y / 3Ø / 4W / 60 Hz

TX

Wall / Ceiling Mounted 1st Floor New Filter Building

15 KW Unit Heater 480 V / 277Y / 3Ø / 60 Hz

18 FLA

Controls

1” C w/4 – # 10

&1 - #10 GND

NF 3P

Disconnect

3/4” C w/One 18 ga 7 wire cable Wall Mounted

Thermostat

PCPNRH

1st Floor New Filter Building

Ethernet - Fiber Switch

3/4"C w/1 Fiber Cable (Ethernet IP)

Pump Control Valve 0.25

3/4” C w/2 – #12

&1 - #12 GND

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MAY 2, 2023

MCT

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E-601 36 39

ELECTRICAL

SINGLE LINE

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Existing Filter Building Basement Level

Raw Water Flow Meter

FCV Raw Influent Valve

HydroAct Transmitter

FCV Filter No.1 Effluent Valve

LIT Clearwell Level

Existing Filter Building Upstairs Level

FV Filter No.1 Filter Backwash Valve

FV Filter No.1 Filter Drain Valve

FCV Filter No.1 Filter-to-Waste Valve

LIT Filter No.1 Level General Location: Outside

Sludge Removal System Control Panel

(Manufacturer Furnished)

Air Scour Blower Control Panel

(Manufacturer Furnished)

New Filter Building 1st Floor

FV Filter No.2 Drain Valve

FV Filter No.2 Air Scour Valve

FCV Train No.1 Influent Valve LIT Filter No.2 Level

FCV Train No.2 Influent Valve

FV Filter No.2 Influent Valve

F1 Filtered Water Flow Meter

F2 Filtered Water Flow Meter & Backwash Feed

FV Filter No.1 Air Scour Valve

Contained within the Process Control Panel (Furnished by Systems Integrator)

Starter Backwash Pump No.1

Starter High Service Pump No.1

Starter High Service Pump No.2

VFD New Floc No.1

VFD New Floc No.2

Starter Raw Water Pump No.1

Starter Raw Water Pump No.2

PIT Filter No.1 Head Loss

FV Sed Basin Sludge Valve

Train 2 Flow Meter

FV Filter No.1 Influent Valve

FV

Backwash Pump Control Valve Control Panel

(Manufacturer Furnished)

Backwash Flow Meter Backwash Valve Position Set/Indication

Check Valve Function

PIT Filter No.2 Head Loss

Filter No.1 Influent Valve 2

Process Control Panel and Network Head (Furnished by Systems Integrator) Located in 1st Floor of New Filter Building

Turbidity Raw Water

Turbidity Settled Water to F1

Turbidity Settled Water to F2

Turbidity F2 Filtered Water

General Notes:

A. Instruments to be furnished and installed by the General Contractor are itemized by general project location on this drawing. The Controls Systems Integrator, VAI, is not responsible for furnishing nor installing the instruments shown on this sheet.

B. Contractor shall furnish and install a dedicated power conduit for each instrument.

C. Contractor shall furnish and install a dedicated digital control signal conduit and cabling as required for each instrument to convey the type and quantity of I/O itemized on Table 3 Drawing E-603 for that instrument. 3/4"C minimum size.

D. Contractor shall furnish and install a dedicated analog control signal conduit and cabling as required for each instrument to convey the type and quantity of I/O itemized on Table 3 Drawing E-603 for that instrument. 3/4"C minimum size.

E. Contractor shall furnish and install a dedicated network conduit and cabling for each instrument as required per Table 3 Drawing E-603 for that instrument. 3/4"C minimum size.

Turbidity Filtered Water F1

FCV Filter No.2 Filter-to-Waste Valve

FV Filter No.2 Backwash Valve

FCV Filter No.2 Effluent Valve

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E-602 37 39

CONTROLS

NETWORK

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General Location of IO DO DI AO AI Ethernet IP Modbus

TCP

Ex. Filter Building (Basement) 36 63 11 26 1 0

Outdoors - Yard Piping 10 16 4 7 0 0

New Filter Building - 1st Floor 18 32 2 7 2 0

Total Connected 64 111 17 40 3 0 235

DO DI AO AI Ethernet IP Modbus

TCP

PCPNH Panel (New Filter Building, 1st Floor) 72 120 24 48 12 Capable 276

Description of Signal & PLC/SCADA Programming Features Signal Type

Modulating Valve;

Quantity 5

Open/Close Valve;

Quantity 5

Future Use on Western

Wall

Level / Pressure /

Flow;

Quantity 5

Motor Starter;

Quantity 2

Backwash Pump

Control Valve Panel

Turbidity Meter;

Quantity 3

HydroAct;

Quantity 1

Open/Close Valve;

Quantity 1

Modulating Valve;

Quantity 2

Flow Meter;

Quantity 1

Control Panels;

Quantity 2

Open/Close Valve;

Quantity 4

Modulating Valve;

Quantity 0

VFDs;

Quantity 2

Flow Meter;

Quantity 1

Motor Starter;

Quantity 3

Turbidity Meter;

Quantity 2

Level / Pressure

Transmitter;

Quantity 2

Remote start/Open DO 5 5 5 2 1 1 2 2 4 2 3

Remote stop/Close DO 5 5 5 2 1 1 2 2 4 2 3

Local/Remote Control Status DI 5 5 5 2 1 1 2 2 4 2 3

Status indication DI 5 5 5 2 1 1 2 2 4 2 3

General Alarm DI 5 5 5 5 2 1 3 1 1 2 1 2 4 2 1 3 2 2

Spare Digital Cable/Conductor(s)

Speed Control or Position Control AO 5 5 1 2 2 2 Feed Back on Speed or Position

Inidication AI 5 5 1 2 2 2

Instrument Reading(s) AI 5 5 1 3 1 1 2 1 2 2

Spare Analog Cable(s)

Ethernet IP via Cat 5 Cable Network 1 2

Spare Network Cables Network

IO in Existing Filter Building - Basement IO Outdoors IO in New Filter Building - 1st Floor

Table 1

Connected I/O Points & Ethernet Ports

Table 2

Minimum Installed I/O Points & Ethernet Ports

Table 3

Itemization of Instrumentation Control Signals & PLC/SCADA Programming Requirements for New Equipment

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