ADDENDUM NO. 4

February 23, 2021

PROJECT: Comanche County WSC – Highway 36 Pump Station

The following changes and/or additions shall be made to the Plans, Specifications, and Contract

Documents for the above referenced project. Bidder shall acknowledge receipt of this Addendum by

signing below and returning this Addendum with the Bid.

I. PLANS

a. SHEET 9 and SHEET 10 – plan sheets shall be replaced with the attached.

II. SPECIFICATIONS

a. Specification 25-04-01 (Supervisory Control and Data Acquisition (SCADA))

i. Existing specification shall be replaced with the attached.

Prepared by:

JACOB & MARTIN, LLC.

Consulting Engineers

_________________________________

Bidder’s Acknowledgment

_________________________________

Date

3465

CUR

RY L

ANE

ABIL

ENE,

TX

7960

632

5-69

5-10

70

1508

SAN

TA F

E DR

, STE

204

WEA

THER

FORD

, TX

7608

681

7-59

4-98

80

FIRM

# F

-244

8

BAR

IS O

NE

INCH

IN L

ENGT

H O

N O

RIGI

NAL

DRA

WIN

G.CH

ECK

SCAL

E &

ADJ

UST

ACC

ORD

INGL

Y.10

14 B

ROAD

WAY

STR

EET

LUBB

OCK

, TX

7940

180

6-36

8-63

75

S

S

A

X

E

F

TO

T

E

A

T

P

R

E

E

N

I

G

N

E

LN

O

I

S

S

E

F

O

R

A

L

D

E

SN

E

C

I

66579

ED

WA

RD

R

. W

EL

LS

Feb

ruar

y 23

, 202

1

3465

CUR

RY L

ANE

ABIL

ENE,

TX

7960

632

5-69

5-10

70

1508

SAN

TA F

E DR

, STE

204

WEA

THER

FORD

, TX

7608

681

7-59

4-98

80

FIRM

# F

-244

8

BAR

IS O

NE

INCH

IN L

ENGT

H O

N O

RIGI

NAL

DRA

WIN

G.CH

ECK

SCAL

E &

ADJ

UST

ACC

ORD

INGL

Y.10

14 B

ROAD

WAY

STR

EET

LUBB

OCK

, TX

7940

180

6-36

8-63

75

S

S

A

X

E

F

TO

T

E

A

T

P

R

E

E

N

I

G

N

E

LN

O

I

S

S

E

F

O

R

A

L

D

E

SN

E

C

I

66579

ED

WA

RD

R

. W

EL

LS

Feb

ruar

y 23

, 202

1

Jacob|Martin 25 04 01

TWDB Highway 36 Pump Station SUPERVISORY CONTROL AND DATAACQUISITION (SCADA)

Project #18439 25 04 01 - 1

SECTION 25 04 01 - SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA)PART 1   GENERAL1.1 REFERENCE STANDARDS

UL 508 - Industrial Control Equipment; Underwriters Laboratories Inc. Current Edition, IncludingAll Revisions.

1.2 WORK INCLUDEDSupervisory Control And Data Acquisition (SCADA) is a type of industrial control that is used inprocess applications.  In a typical SCADA system, independent programmable logic controllers(PLCs) perform Input/Output (IO) control functions on field devices while being supervised by aHuman Machine Interface (HMI) software package, typically running on a personal computer(PC).  Process control technicians monitor PLC operations on the PC and send controlcommands to the PLCs as required.  The HMI SCADA software may also trend and archiveprocess data on the PC for later inspection.

1.3 QUALITY ASSURANCEAll work shall be performed in a first class manner by mechanics skilled in their respectivetrades.  The standards of work required throughout shall be such grade as will bring results ofthe first class only.

1.4 PREQUALIFIED BIDDERSA. Wallace Controls & Electric, Inc.; Meridian, TX; 254-435-2544; fax 254-435-2524B. Richardson Logic Controls, LLC; McKinney, Texas 75067; (972) 569-9787; fax (214) 733-8254C. Prime Controls, Lewisville, Texas; 972-221-4849; fax 972-420-4842; Gary McNeal ext. 218D. WHECO Controls, Ft. Worth, Texas; 817-244-6660; fax 817-560-3263E. Trac-n-Trol, Georgetown, TX; 512-930-5721F. RLC Controls, Inc., McKinney, TX 972-542-7375

1.5 SPARE PARTSA. PLC: SCADA Pack 334, Qty 1 B. Radio:  Freewave FGR-2-CE with Mfg. Hardware , Qty 1 C. Polyphaser:  Qty 1 D. Power Supply:  Qty 1 E. Pressure Transducer:  Range 0-30 feet , Qty 1

PART 2   PRODUCTS2.1 DETAILED MATERIALS DESCRIPTION

A. PROGRAMMABLE LOGIC CONTROLLER (PLC)A PLC is a special-purpose computer used in industrial monitoring and controlapplications.  The PLC shall be as follows, or an approved equal:

1. SCADA Pack 334 (P334)Analog Inputs, On-board: 8 User SelectableAnalog Outputs, On-board: None StandardDigital Inputs, On-board: 16Digital Outputs, On-board: 10 dry contact relays or 10 solid state relays.Communication Ports: 2 RS232/RS485, 1 RS 232Integrated Ethernet Ports: 1 10/100 Base TSerial Protocols: Modbus TCP, Modbus ASCII, DNP3, and DF1.

Jacob|Martin 25 04 01 Comanche County WSC Highway 36 PumpStation

SUPERVISORY CONTROL AND DATAACQUISITION (SCADA)

25 04 01 - 2

Ethernet Protocols: Modbus TCP, Modbus RTU in UDP, Modbus ASCII in UDP, DNPin TCP, DNP in UDP.

B. RADIOA radio transceiver sends commands and monitoring information between the SCADAsites via radio frequency waves.  The radio waves are transmitted and received through aradio antenna mounted at each site.

1. Freewave:Model FGR2-CE

Frequency Range: 902-928 MHz (FHSS)Output Power: 5 mW to 1 WattRange, Line of site: 60 MilesLink Throughput: 115.2 Kbps standard speed, 80 Kbps low speedData Interface: SerialProtocol: RS232 / 485 / 422 or TTL, 1200 Baud to 115.2 KBaud, DCEOperating Voltage: 6 - 30 VDCOperating Temperature Range: -40 Degrees C to +75 degrees C

C. ANTENNAAntenna shall be as follows, or an approved equal:

1. OMNI:a. New-Tronics HD6-90142

MHz: 902-928Gain Connector: 6 dBd N-FemaleDescription: Heavy Duty Environment

b. New-Tronics HD10-90142MHz: 902-928Gain Connector: 10 dBd N-FemaleDescription: Heavy Duty Environment

D. COAXIAL CABLECoaxial cable for each site from Polyphaser to antenna shall be as follows or an approvedequal:

1. Times Microwave SystemsTimes Mic LMR-400Description: 50 Ohm Coaxial Cable - Low Loss RG8/U cableType: 3/8" BraidedShield %: 100% foil, 85% braidedCenter Conductor: 0.108" Solid

E. POLYPHASERPolyphaser shall be as follows, or an approved equal:

1. Polyphaser Corporation:IS-B50LN-C2, Broadband dc Blocked ProtectorFrequency: 125 - 1000 MHzRF Power: VHF 375, UHF 125 WattsApplication: Single Transmitter OnlyWeatherized: No

F. TOWERTower shall be as follows, or an approved equal:

1. Rohn Products:SS040D90, Tower Height 40 feet, face spread 2' 2"SS050D90, Tower Height 50 feet, face spread 2' 6"SS060D90, Tower Height 60 feet, face spread 2' 6"SS070D90, Tower Height 70 feet, face spread 4' 6 1/4"SS080D90, Tower Height 80 feet, face spread 4' 6 1/4"SS090D90, Tower Height 90 feet, face spread 6' 6 3/4"SS100D90, Tower Height 100 feet, face spread 6' 6 3/4"

G. SITE INTERFACE UNIT (SIU)

Jacob|Martin 25 04 01

TWDB Highway 36 Pump Station SUPERVISORY CONTROL AND DATAACQUISITION (SCADA)

Project #18439 25 04 01 - 3

The SIU will allow the OWNER to access information about all SCADA sites from a digitalmenu provided on each SU.

1. Maple Systems:a. HMI5070Bb. 7.0" Basic HMI, 1 Ethernet Port, 1 USB Port, 1 Serial Portc. 800x480 Resolutiond. 600 Mhz RISC CPU

H. ENCLOSURE1. Hammond Manufacturing

1418 N4 Series Single Door Enclosure - NEMA 4Size: 24"W X 24"H X 8"DHinge Type: ContinuousCover Type: ClampedStandards: UL 508 Type 3R, 12, 4 CSA Type 3R, 12, 4

I. 24V POWER SUPPLY1. IDEC: PS5R-C24

Status: ActiveInput Voltage: 240VAC; 110-340VDCOutput Voltage: 24V DCOutput Power: 30WOutput Current: 1.3ASpecial Certification: UL 508Degree of Protection: IP20 (fingersafe)

J. SOFTWAREIntegration software allows for the monitoring and control information from the PLC's atSCADA sites to be shown graphically on a PC computer with peripherals.

1. VTScadaa. SCADA software shall allow remote acccess and control of SCADA system through

internet connected smartphone device (iOS or Android)K. DESKTOP COMPUTER

Desktop computer shall be manufactured by Dell Corp. or an approved equal.  Minimumrequirements are as follows:a. 64-bit Windows 10b. 2 GHz dual-core processorc. 100 GB free hard drive spaced. SSD hard drivee. 8 GB RAMf. 22" Monitorg. Mouse & Keyboard

L. UNINTERRUPTIBLE POWER SUPPLY (UPS)A UPS will ensure continued operation and flow of information from the radio and PLC atSCADA sites during short term power outages.  UPS shall be as follows, or an approvedequal:

1. APCAPC BE350G, for site useOutput Connection: 3 NEMA 5-15R battery backup, 3 NEMA 5-15R surge protectionTypical backup time at half load: 9.7 minutes (100 watts)Typical backup time at full load: 2.3 minutes (200 watts)

PART 3   SCADA SITES3.1 SITE # 1 - PROPOSED HIGHWAY 36 PUMP STATION

Site details, Longitude -98.711640°, Latitude 31.988233°, Elev Approximately 1425 ft.

Jacob|Martin 25 04 01 Comanche County WSC Highway 36 PumpStation

SUPERVISORY CONTROL AND DATAACQUISITION (SCADA)

25 04 01 - 4

A. FUNCTIONALITY1. Monitor, record and trend tank level2. Monitor, record and trend system pressure3. Monitor, record and trend pump discharge pressure4. Monitor and record flow5. Pump Status will be displayed for 2 pumps6. Pump "Run Hours" and "Maintenance Hours" will be recorded for all pumps7. Site power and communications status will be monitored and displayed8. "Hand/Off/On (HOA)" Pump controls for [2] pumps based on user-defined setpoints and

tank level of County Line Storage Tank9. Provide "Low Level Lockout" protection for pumps based on user-defined setpoints and

tank level of Proposed On-Site Storage Tank 10. "Hand/Off/On (HOA)" Control of Tank Fill Valve based on user-defined setpoints and tank

level of Proposed On-Site Storage Tank 11. "Auto/Off" Control of Chemcial Feed System (CL2 & LAS) based on status of Tank Fill

Valve 12. Proposed site antenna shall be located to top of proposed storage tank.

B. SITE MATERIALS SUMMARY1. PLC, Control MicroSystems2. SIU3. Radio4. Antenna - (Contractor to install site antennae on top of proposed ground storage tank)5. Coax6. Polyphaser7. Flowmeter(s)

Quantity:                   1 Application:                Storage Tank Flow In Pipe Size and Type:         3" Ductile Iron Pipe Access:                Inside Building Location of Electronics:   Inside Building

8. Pressure TransmitterQuantity:                   3 Application:                Storage Tank Supply Line Pressure, Storage TankLevel, Pump Discharge Line Pressure Range:                      (See Plans)

9. Enclosure10. 24V Power Supply11. Uninterruptible Power Supply

3.2 SITE # 2 - EXISTING DELEON PUMP STATIONSite details, Longitude -98.554482°, Latitude 32.107475°, Elev Approximately 1340 ft

A. FUNCTIONALITY1. Existing site for main SCADA control computer.2. SCADA system shall be migrated from existing computer to new computer and software.3. Site has internet access.  VTScada to be installed on proposed new computer.4. OWNER shall have remote access to and control of SCADA system through smart phone

device (iOS or AndroidB. SITE MATERIALS SUMMARY

1. SoftwareVTScada

2. Desktop Computer3. Uninterruptible Power Supply

3.3 SITE # 3 - COUNTY LINE STORAGE TANKExisting storage tank site, Longitude 98°52'7.25"W, Latitude 32° 0'57.42"N, Elev ~ 1750 feet

A. FUNCTIONALITY1. Monitor, record and trend tank level

Jacob|Martin 25 04 01

TWDB Highway 36 Pump Station SUPERVISORY CONTROL AND DATAACQUISITION (SCADA)

Project #18439 25 04 01 - 5

2. Site power and communications status will be monitored and displayed3. Existing antennae and coax cable at site shall be utilized.

B. SITE MATERIALS SUMMARY1. PLC, Control MicroSystems2. SIU3. Radio4. Polyphaser5. Pressure Transmitter

Quantity: 1 Application: Storage Tank Level Range: 0 - 30 feet

3.4 REPORT SUMMARYA. Daily Reports

1. Custom Report2. Alarm Report

3.5 DATA TREND SUMMARYA. Tank Level at new pump stationB. Pump discharge pressureC. Supply line pressure

-- END OF SECTION --