SOW Chemical Injection Skid - Edited 06102026.doc

Scope Of Supply for

Amistad Powerplant Chemical Dosing System

I. BACKGROUND:

Amistad Dam’s hydropower plant is currently experiencing significant zebra mussel infestation throughout the raw cooling water system, which feeds critical components including generator air coolers, bearings, turbine packing, turbine wear rings, HVAC air handling units, compressor aftercoolers, and raw water hydrants. This infestation has already resulted in: clogged strainers and downstream piping (<1.5 in.), causing repeated low‑flow HVAC alarms and the need for continual manual flushing. Reduced cooling efficiency, jeopardizing the operation of the two 33‑MW generators, which rely entirely on raw cooling water drawn from Lake Amistad—now heavily infested with zebra mussels.

Failure to address this will increase equipment wear, unplanned outages, and potential de-rating of hydropower generation units.

Zebra mussels rapidly recolonize; intermittent or manual treatments are insufficient. Continuous dosing at targeted injection points (as recommended—two skids with dosing pumps) ensures protection of the entire raw cooling water network. Current manual efforts—flushing pipes, cleaning strainers, and addressing repeated flow restrictions—are labor‑intensive and unsustainable. Automated injection directly reduces the frequency of emergency HVAC and cooling system shutdowns, manual de-fouling operations and component degradation due to restricted cooling water flow.

The United States Section of the International Boundary and Water Commission (USIBWC). Amistad Dam Field Office requires the purchase of one chemical dosing single pump system (That is the equivalent to or exceeds the specifications of a DICE DM), one chemical dosing duplex pump system (That is the equivalent to or exceeds the specifications of a DICE DM), and Copper Based Chemical (That is the equivalent to or exceeds the specifications of a Earth Tec QZ). The equipment shall include the items listed below that meet or exceed manufacturer guidelines and or recommendations. All items categorized as standard equipment shall be provided. The equipment will be delivered to the United States Section of the International Boundary and Water Commission (USIBWC), Amistad Dam Field Office in Del Rio, Texas.

II. LOCATION:

International Boundary and Water Commission

Amistad Dam Field Office

670 Texas Spur 349

Del Rio, TX 78840

III. SCOPE OF WORK:

One chemical dosing single pump system (That is the equivalent to or exceeds the specifications of a DICE DM), (Minimum Requirements):

Dosing Module:

Size- 1/2''

Pressure- 0-150 psi

Block material- Acrylic

Wetted parts material- CPVC

Valve seat material- PTFE

Diaphragm material- FKM/Viton

Seal material- FKM/Viton

Valve Handle material- ABS Black

Fasteners- Stainless-Steel 18-8

Connections- 1/2'' MNPT & Hose connector, Isolator with Pressure Gauge Pressure Gauge with isolator:

· Model IS24-Cll-S1

· Size – 1/2”

· Wetted parts material: CPVC

· Diaphragm: FKM/Viton

· Seal material: FKM/Viton

Pressure Gauge: Marquest ½” PVC Tuff Guard isolator

· Pressure: 0-160 psi

· Diameter: 2 ½’’

· Glycerin filed

· 316 Stainless-Steel Construction

· Female NPT inlet supply connection assembled Ball valves for outlet, calibration column and drainage

· Asahi ½” PVC/VITON, Type 21 True Union ball valve, two way blocking, schedule 80, with socket ends.

Ball Check Valve

· Asahi ½” PVC/VITON, Type 21 True Union check valve, schedule 80, with socket ends.

Auxiliary ports – pulsation dampener, washing port, transport/dilution water and secondary pumps.

Adjustable back pressure valve

· ECO valve, primary fluid systems ½” PVC, manually adjustable diaphragm style two-port design with PTFE diaphgram and Viton O0rings, true union connections. External hardware is 316L stainless steel with plastic end caps. Pressure adjustment is 7-150 PSI.

Adjustable pressure relief valve

Bleed valve

Pulsation Dampener

· Blacoh 10 cu in/16 liter capacity, PVC housing with VITON bladder, and ½” FNPT threaded connection.

Injection Quill, Retractable, 1” MNPT Brass CSx1/2” S40 316SS Solution Tube, 150 PSI, 18” Insertion

NEMA 4X Junction box with terminal strip Tubing, check valve and weight with tubing and quick disconnect for use of 55 gal drum and 275 gallon tote with hook up to inlet to skid.

Tuffskid discharge manifold block PVC construction.

Integrated Check Valve:

Model number- DICE CO21-VI-N

Connector Hose- PVC & MNPT 1/2''

Integrated Check Valve; Inlet; For LMI Ferrule Kit PN: FK21 Module 1/2''; Hastelloy C276 Spring; Ceramic Ball, O-rings, FKM/VITON; PTFE internal parts Wall Mount Panel:

Model- DICE SKL-2N-TO-HWS

Support- Wall Mount

Configuration- Kit

For DICETM size- 1/2''

Panel Size- Standard

Shelf- Standard

Shelf Enclosure- Open

Material- HDPE

Color- White

Fasteners material- Stainless Steel 37” Wall Skid Tuffskid/charcoal wall mount rotationally molded double wall design. The skid is constructed of chemical resistant high density polyethylene (HDPE) and is 100% UV stabilized. Built in containment area with a sloped bottom allowing any fluid to drain to sump with ¾” NPT connection. Dimensions:36”w x 30”d x 43”h

Pump base for single pump Tuffskid rotationally molded double wall design. The skid is constructed of chemical resistant high density polyethylene (HDPE) and is 100% UV stabilized.

Calibration cylinder

Model: CC0300S

Volume: 300ml

Material: PVC Primary fluid systems 250 ml/ 4 GPH PVC calibration chamber based on a 60 second drawdown, with ½” top and bottom socket weld ends, 0-15 PSI Max.

Dosing Pump (Single) Grundfos

DDA 7.5-16

Capacity at max. pressure – 1.98 g/h (7.5 l/h)

Max pressure – 232 PSI

Setting range- 3000:1

Stroke frequency – spm 190

Suction lift: primed / dry 19.6 ft / 6.5 ft

Viscosity (slow mode) – 2500 / 50 cps

Power supply- 100-240 Volts 50-60 HZ

Accuracy- +/- 1%

PVDF-FKM: 93065175

Dimensions: 4.72”w x 11” d x 7.72” h

Max capacity setting

Anti-cavitation/slow mode

Flow monitoring

Pressure monitoring

Auto flow adapt

Chemically Compatible with Earth Tec QZ

Digital Controls

DDA Input Control: 96609016

DDA Relay Output: 96609019 4-Pole M12 5M cable socket 2+4 Assembly

DICE Panel assembly shall include the panel and dosing module.

Tubing assembly:

· 3/8’’ PE tubing from the dosing pump to the DICE inlet

· 3/8’’ PE tubing from the dosing pumps suction (6FT)

· 3/8” PE tubing from the DICE drain port (6FT)

Factory Assembly (FAT) test

Consisting of operating the system at a maximum pressure of 150psi and inspecting for leaks.

One chemical dosing duplex pump system (That is the equivalent to or exceeds the specifications of a DICE DM), (Minimum Requirements):

Dosing Module:

Size- 1/2''

Pressure- 0-150 psi

Block material- Acrylic

Wetted parts material- CPVC

Valve seat material- PTFE

Diaphragm material- FKM/Viton

Seal material- FKM/Viton

Valve Handle material- ABS Black

Fasteners- Stainless-Steel 18-8

Connections- 1/2'' MNPT & Hose connector, Isolator with Pressure Gauge Pressure Gauge with isolator:

· Model IS24-Cll-S1

· Size – 1/2”

· Wetted parts material: CPVC

· Diaphragm: FKM/Viton

· Seal material: FKM/Viton

Pressure Gauge: Marquest ½” PVC Tuff Guard isolator

· Pressure: 0-160 psi

· Diameter: 2 ½’’

· Glycerin filed

· 316 Stainless-Steel Construction

· Female NPT inlet supply connection assembled Ball valves for outlet, calibration column and drainage

· Asahi ½” PVC/VITON, Type 21 True Union ball valve, two way blocking, schedule 80, with socket ends.

Ball Check Valve

· Asahi ½” PVC/VITON, Type 21 True Union check valve, schedule 80, with socket ends.

Auxiliary ports – pulsation dampener, washing port, transport/dilution water and secondary pumps.

Adjustable back pressure valve

· ECO valve, primary fluid systems ½” PVC, manually adjustable diaphragm style two-port design with PTFE diaphgram and Viton O0rings, true union connections. External hardware is 316L stainless steel with plastic end caps. Pressure adjustment is 7-150 PSI.

Adjustable pressure relief valve

Bleed valve

Pulsation Dampener

· Blacoh 10 cu in/16 liter capacity, PVC housing with VITON bladder, and ½” FNPT threaded connection.

Injection Quill, Retractable, 1” MNPT Brass CSx1/2” S40 316SS Solution Tube, 150 PSI, 18” Insertion

NEMA 4X Junction box with terminal strip

Tubing, check valve and weight with tubing and quick disconnect for use of 55 gal drum and 275 gallon tote with hook up to inlet to skid.

Tuffskid discharge manifold block PVC construction.

Integrated Check Valve:

Model number- DICE CO21-VI-N

Connector Hose- PVC & MNPT 1/2''

Integrated Check Valve; Inlet; For LMI Ferrule Kit PN: FK21 Module 1/2''; Hastelloy C276 Spring; Ceramic Ball, O-rings, FKM/VITON; PTFE internal parts Wall Mount Panel:

Model- DICE SKL-2N-TO-HWS

Support- Wall Mount

Configuration- Kit

For DICETM size- 1/2''

Panel Size- Standard

Shelf- Standard

Shelf Enclosure- Open

Material- HDPE

Color- White

Fasteners material- Stainless Steel 37” Wall Skid Tuffskid/charcoal wall mount rotationally molded double wall design. The skid is constructed of chemical resistant high density polyethylene (HDPE) and is 100% UV stabilized. Built in containment area with a sloped bottom allowing any fluid to drain to sump with ¾” NPT connection. Dimensions:36”w x 30”d x 43”h

Pump base for duplex dosing pumps Tuffskid rotationally molded double wall design. The skid is constructed of chemical resistant high density polyethylene (HDPE) and is 100% UV stabilized.

Calibration cylinder

Model: CC0300S

Volume: 300ml

Material: PVC Primary fluid systems 250 ml/ 4 GPH PVC calibration chamber based on a 60 second drawdown, with ½” top and bottom socket weld ends, 0-15 PSI Max.

Dosing Pumps (Duplex) Grundfos

DDA 7.5-16

Capacity at max. pressure – 1.98 g/h (7.5 l/h)

Max pressure – 232 PSI

Setting range- 3000:1

Stroke frequency – spm 190

Suction lift: primed / dry 19.6 ft / 6.5 ft

Viscosity (slow mode) – 2500 / 50 cps

Power supply- 100-240 Volts 50-60 HZ

Accuracy- +/- 1%

PVDF-FKM: 93065175

Dimensions: 4.72”w x 11” d x 7.72” h

Max capacity setting

Anti-cavitation/slow mode

Flow monitoring

Pressure monitoring

Auto flow adapt

Chemically Compatible with Earth Tec QZ

Digital Controls

DDA Input Control: 96609016

DDA Relay Output: 96609019 4-Pole M12 5M cable socket 2+4 Assembly

DICE Panel assembly shall include the panel and dosing module.

Tubing assembly:

· 3/8’’ PE tubing from the dosing pump to the DICE inlet

· 3/8’’ PE tubing from the dosing pumps suction (6FT)

· 3/8” PE tubing from the DICE drain port (6FT)

Factory Assembly (FAT) test

Consisting of operating the system at a maximum pressure of 150psi and inspecting for leaks.

· Vendor shall ensure the complete dosing systems and auxiliary piping, connections, housings, etc are chemically compatible with Earth Tec QZ.

· Vendor shall submit complete installation drawings of system need and be approved by government prior to ordering of system and project execution.

· Complete dosing systems shall be furnished with all necessary equipment, controls and programming for total system compatibility and integration for turnkey project execution.

· Dosing system, pumps, chemical and chemical containment shall be from same vendor

· Product training shall be provided upon delivery of chemical dosing units. Training is to be provided at the Amistad Dam Field Office by a factory representative or factory-trained representative to Operators and Mechanics on safety, operation, and preventive maintenance of the units.

· Manuals: Two (2) complete sets of hard copy manuals and electronic copy shall be provided for chemical dosing system as follows:

1) Operator's Manual

2) Parts Book

3) Service Manuals including wiring diagrams and troubleshooting guide

4) System Manual including parts book and service repair manual.

5) Preventative maintenance manual.

6) Installation Manual

IV. PERIOD OF PERFORMANCE:

Vendor has up to 90 calendar days after the effective date of Purchase Order to comply with the following:

· Delivery of one (1) Chemical Dosing Single Pump System

· Delivery of one (1) Chemical Dosing Duplex Pump System

· Delivery of one (1) 275 Gallon Tote with Earth Tec QZ chemical

· Delivery of two (2) Complete sets of Hard Copy manuals and electronic copy.

Vendor has up to 10 calendar days after the effective date of delivery to comply with the following:

· Chemical Injection System Product and Operational Training at Amistad Dam Field Office

V. DELIVERY:

Vendor has up to 90 calendar days after the effective date of Purchase Order to comply with the following:

· Delivery of one (1) Chemical Injection Single Pump System

· Delivery of one (1) Chemical Injection Duplex Pump System

· Delivery of one (1) 275 Gallon Tote with Earth Tec QZ chemical

· Delivery of two (2) Complete sets of Hard Copy manuals and electronic copy.

Vendor has up to 10 calendar days after the effective date of delivery to comply with the following:

· Chemical Injection System Product and Operational Training at Amistad Dam Field Office Inspection and Acceptance will occur at the Amistad Field Office.

Delivery To: International Boundary and Water Commission

Amistad Dam Field Office

670 Texas Spur 349

DelRio, TX 78840

VI. WORK HOURS:

Work hours shall be from 7:30 am to 4:00 pm local time, Monday to Friday, except for Federal holidays.

VII. Amistad Dam Field Office POINT OF CONTACT:

Angelica Baca angelica.baca@ibwc.gov or Seone Jones seone.jones@ibwc.gov

VIII. PAYMENTS:

The U.S. Section International Boundary and Water Commission (USIBWC) has transitioned to an electronic invoicing system. The Invoice Processing Platform (IPP) is a secure, web-based system provided by the U.S. Department of the Treasury’s Bureau of the Fiscal Service in partnership with the Federal Reserve Bank of St. Louis. IPP is available at no cost to any commercial vendor or independent contractor doing business with a participating government agency. Information concerning accessing the IPP system will be provided at time of award.

A copy of the invoice shall be sent to the Amistad Field Office.

Payment shall be made upon acceptance by the Amistad Field Office in accordance with contract.

For further information, please contact angelica.baca@ibwc.gov or seone.jones@ibwc.gov via email ONLY.

END OF SOW