Attachment 1 -SOW BGNDRF Storage Tanks Maintenance and Repairs 1-21-2021_2.pdf

STATEMENT OF WORK (SOW)

BGNDRF Storage Tanks Maintenance and Repairs

12/21/2020

1.0 INTRODUCTION

1.1 The Bureau of Reclamation, Upper Colorado Region, Brackish Groundwater National

Desalination Research Facility (BGNDRF) has a requirement for performing maintenance and repair on three large, glass-fused to steel, water storage tanks. All tanks were built in 2004 and put in service shortly afterwards. The storage tanks are numbered 1 through 3 with storage tank 1 being the westernmost tank (50,000 gallons), storage tank 2 being the middle tank (100,000 gallons) and storage tank 3 being the easternmost tank (50,000 gallons).

1.2 BGNDRF is a 43-acre complex in which groundwater from four wells can be delivered to indoor and outdoor test sites. Water is pumped from the wells directly to either of the three storage tanks, and then routed to the various test sites via storage tanks’ hydropneumatics system.

Generally, a unique well water is placed in each storage tank and deliveries to various clients can be made based on their request for a specific well water.

1.3 The conductivity of water stored in each storage tank can be as high as 6,600 µS/cm.

1.4 The three storage tanks underwent very little maintenance since they were put into service.

Inspections of the storage tanks were performed in 2016 and 2018 by a contractor specializing in these types of tanks. See Exhibits A and B. This SOW is written based on most of the recommendations in the inspection reports.

1.5 A contaminant, per- and polyfluoroalkyl substances (PFAS), has been detected in 2 of 4

BGNDRF well waters. The City will not allow water with any detectable level of PFAS to be discharged to its wastewater treatment plant. As a result, the dead space in the bottom of the storage tanks will occasionally need to be transferred to the BGNDRF evaporation ponds.

A new drain port is in each tank needs to be added for ease of this operation.

1.6 Storage Tank information is presented in the table below:

Specification Storage Tank 1 Storage Tank 2 Storage Tank 3

Location Furthest from Mountains

Middle Tank Closest to Mountains

Product Aquastore Aquastore Aquastore

Model No. 2024 WT 2824 WT 2024 SWT

Capacity (gallons) 50,000 102,000 50,000

Serial Number 8041029 8041033 8049042

Nominal Diameter (ft) 19.58 27.97 19.58

Nominal Height (ft) 23.84 23.84 23.84

Exterior Coating Tan Fused Glass Tan Fused Glass Tan Fused Glass

Roof Type Knuckle – Tan Fused Glass

Knuckle – Tan Fused Glass

Knuckle – Tan Fused Glass

Date Built 2004 2004 2004

Built By Southwest Aquastore

Southwest Aquastore

Southwest Aquastore

Interior Coating White Fused Glass

White Fused Glass

White Fused Glass

Roof Brand CST CST CST

2.0 SCOPE OF WORK

This Statement of Work covers the maintenance and repairs of all three storage tanks at BGNDRF. A drain through the tank wall near the floor with a valve and plumbing will be added to each tank. The

Contractor must provide all materials, supplies, tools, sealers, coatings, mastics, personal protective equipment, scaffolding, ladders, surface preparations and anything else necessary to perform all maintenance and repairs. The Contractor will be required to schedule a month in advance when the work will begin. The worksite at all 3 storage tanks must be completely clean upon completion of work. Mobilization and demobilization costs will be paid by the Contractor.

3.0 DESCRIPTION OF WORK

3.1 Location. The work is located at BGNDRF, 500 LaVelle Road, Alamogordo, New Mexico 88310.

BGNDRF is a 43-acre complex comprised of a central research building, various test areas, and water and wastewater delivery systems. The storage tanks are in the south-central area of the property. See Exhibit C for an aerial view of BGNDRF and for the location of the storage tanks.

3.2 Mobilization. The BGNDRF client load and project activity can vary significantly throughout the year. Due to the need to minimize impacts to BGNDRF clients and projects, the tanks will be taken out of service one at a time. Once the tank is returned to service (see section 3.10) and verified by the COR, the contractor will be approved to start the next tank. It is unclear if the Contractor will need to mobilize one time to accomplish the work described in this

Statement of Work or if the Contractor will need to mobilize multiple times. Specifically, the

Contractor may mobilize a minimum of 1 time or a maximum of 3 times. BGNDRF will make every effort to work with its clients to minimize the number of mobilizations. If possible

BGNDRF will try to have two tanks available for contractors.

3.3 Replace Liquid Level Decals. Remove old liquid level decals at each of the 3 storage tanks and prepare each surface for the new decals. Adhere new decals to the metal substrate, ensuring that they are positioned properly for indicating depth of water in each storage tank. The decals shall be positioned with clean vertical lines with no loose edges or bubbles under the decal. All work including surface preparation and application of the decals must be performed according to manufacturer’s recommendations.

3.4 Repair Damaged Knuckle Roofs and Other Exterior Tank Panel Damage. The 2018 Inspection

Report (See Exhibit B) has photos of damages to the knuckle roof on each of the 3 storage tanks. Each of these areas and all other damages on the knuckle roof panels and side exterior panels must be repaired. Damaged surfaces will be prepared for application of Manus Sealer

No. 98 or equivalent. Factory recommendations for the preparation of surfaces and application of the sealer must be followed.

3.5 Cleaning of the Interior of Each Storage Tank. The Government will drain each of 3 storage tanks prior to the Contractor commencing work on the interior. The Government will remove and dispose all sediment from each storage tank. The Contractor will pressure wash the biofilm from the interior walls of each storage tank.

3.6 Total Reseal of Interior Sidewall Tank Seams. A total reseal will be required for all three (3) storage tanks’ interior sidewall seams after the tank interiors have been power washed by the

Contractor.

3.6.1 Remove bottom ring panel to facilitate scaffolding access for tank interior work.

3.6.2 Scrape and power wire brush all interior, sidewall panel edges to clean metal.

3.6.3 Reseal all interior sidewall panel edges with CIM 1061 two-component urethane using manufacturer’s standard application practice.

3.6.4 Stripe along all interior bolt heads with CIM 1061 two-component urethane approximately 4”-6” wide to coat over bolt heads and overlapping single component urethane sealer.

3.6.5 Stripe along top panel edge with CIM 1061 two-component urethane approximately 4”-6” wide to coat top edge and top horizontal bolt seam.

3.6.6 At tank shell floor line, coat with CIM 1061 two-component urethane approximately 8” out onto properly cleaned concrete floor and 12” up onto tank shell.

3.6.7 Coat bottom full panel edges with CIM 1061 two-component urethane coating.

3.6.8 Perform touch-up with single component urethane sealer per tank manufacturer’s standard maintenance practice of glass coated interior panel surfaces that exhibit coating voids or show evidence of rust corrosion.

3.6.9 Reinstall bottom ring panel (removed for scaffolding access) using new fasteners and exterior bolt caps. Reseal interior seams of the bottom ring panel with CIM 1061 two-component urethane to re-establish panel edge protection.

3.7 Maintenance/Repair of Corrosion Protection System.

3.7.1 Replace the zinc anode in each storage tank with new zinc anodes that are sized based on storage of brackish groundwater with a conductivity of 6,600 µS/cm.

3.7.2 The 2018 inspection of Storage Tank 2 indicated a possible problem with the corrosion protection system being tied into the lightning protection system. This system will be re-inspected by the Contractor and re-wired by the Contractor according to standard industry corrosion protection practices as required.

3.8 Repaint Exterior Pipe. The 2016 inspection of the storage tanks noted the fill pipes attached to the exterior of Storage Tanks 1 and 2 needed to be repainted because some of the existing painting had come off the pipes.

3.8.1 Repaint the fill pipes on Storage Tanks 1 and 2 and touch-up paint appurtenances attached to each of the 3 storage tanks where the existing paint has come off.

Use the matching color and type of coating previously applied. Prepare surfaces prior to painting according to industry practices. The dried paint should have a uniform, consistent appearance with the rest of the existing painted surfaces without splotches.

3.9 Addition of a 2-Inch Drain to Each Tank

3.9.1 Using industry accepted methods for glassed fused to steel tanks, add a 2-inch penetration through the wall of each tank as close to the floor of the tank as possible. See Exhibit D.

3.9.2 Install a valve and plumbing in each 2-inch penetration as depicted in Exhibit D.

3.10 Returning the Storage Tank to Service.

3.10.1 After completion of work, enough time shall be allowed prior to refilling the tank to allow for adequate cure time of sealer and CIM coating used on the tank interior. Cure time for sealer will depend on temperature and humidity, as a minimum, water should not be introduced into the tank for 7 days following completion of the work.

3.10.2 Water will be reintroduced by the Government according to the Fill Rate Chart in

Exhibit E.

3.10.3 Disinfection is not required for reintroducing water in the storage tanks.

3.10.4 Upon reintroduction of water to each storage tank by the Government, each storage tank will be filled to the maximum level and monitored for 24 hours for leaks. If leaks are observed, the storage tank with the leak will be drained by the

Government. It will be the Contractor’s responsibility to repair all leaks. After curing time for the sealer (See 3.9.1) the tank(s) will be refilled and monitored for

24-hours for leaks.

3.11 Cleanup of the Work Site Around the 3 Storage Tanks. The Contractor will be responsible for removing all debris from the worksite and restoring the worksite to pre-worksite level of cleanliness. Debris must be disposed by the Contractor at an appropriate off-site location.

4.0 MATERIAL SPECIFICATIONS

4.1 Bolt Fasteners

4.1.1 Bolts used in tank lap joints shall be ½" - 13 UNC- 2A rolled thread, and shall meet the minimum requirements of AWWA D103, Section 4.2.

4.1.2 Bolt Material

4.1.2.1 SAE J429 Grade 2 (1" bolt length)

4.1.2.1.1 Tensile Strength - 74,000 psi Min.

4.1.2.1.2 Proof Load - 55,000 psi Min.

4.1.2.1.3 Allowable shear stress with threads excluded from the shear plane - 18,163 psi Min.

4.1.2.2 SAE J429 Grade 5 (1 1/4" bolt length)

4.1.2.2.1 Tensile Strength - 120,000 psi Min.

4.1.2.2.2 Proof Load - 85,000 psi Min.

4.1.2.2.3 Allowable shear stress with threads excluded from the shear plane – 29,454 psi Min.

4.1.2.3 SAE J429 Grade 8 (>1 1/4" bolt length)

4.1.2.3.1 Tensile Strength - 150,000 psi Min.

4.1.2.3.2 Proof Load - 120,000 psi Min.

4.1.2.3.3 Allowable shear stress with threads excluded from the shear plane – 36,818 psi Min.

4.1.3 Bolt Finish - Zinc, mechanically deposited.

4.1.3.1 2.0 mils (0.002 inches) Min. - under bolt head, on shank and threads.

4.1.4 Bolt Head Encapsulation

4.1.4.1 High impact polypropylene copolymer encapsulation of entire bolt head up to the splines on the shank.

4.1.4.2 Resin shall be stabilized with an ultraviolet light resistant material such that the color shall appear black.

4.1.4.3 The bolt head encapsulation shall be certified to meet the ANSI/NSF Standard 61 for indirect additives.

4.1.5 All bolts on the vertical tank wall shall be installed such that the head portion is located inside the tank, and the washer and nut are on the exterior.

4.1.6 All lap joint bolts shall be properly selected such that threaded portions of the bolts will not be exposed to the "shear plane" between tank sheets.

4.1.7 Bolt lengths shall be sized to achieve a neat and uniform appearance. Excessive threads extending beyond the nut after torqueing will not be permitted.

4.1.8 All lap joint bolts shall include a minimum of 4 splines on the underside of the bolt head at the shank in order to resist rotation during torqueing.

4.1.9 Polyethylene co-polymer “bolt caps” and sealant shall be used to cover the bolts, nuts, & washers exposed on the outside of the tank sidewall.

4.2 Sealants

4.2.1 The lap joint sealant shall be a one component, moisture cured, polyurethane compound. The sealant shall be suitable for contact with potable water and shall be certified to meet ANSI/NSF Additives Standard 61 for indirect additives.

4.2.2 The sealant shall be used to seal lap joints and bolt connections and edge fillets for sheet notches and starter sheets. The sealant shall cure to a rubber-like consistency, have excellent adhesion to the glass coating, low shrinkage, and be suitable for interior and exterior use.

4.2.3 Sealant curing rate at 73°F and 50% RH.

4.2.3.1 Tack-free time: 6 to 8 hours.

4.2.3.2 Final cure time: 10 to 12 days.

4.2.4 Neoprene gaskets and tape type sealer shall not be used.

4.2.5 The sealant shall be Manus Sealer No. 98.

4.2.6 Due to poor compatibility with chlorine, the sealant Sika 1A shall NOT be used on water storage tanks. Sika 1A should only be used in special non-potable water applications.

4.3 CIM Coating

4.3.1 CIM coating shall be a two-component, high solids, elastomeric asphalt modified urethane.

4.3.2 CIM coating shall be applied by brush, roller, trowel, or squeegee. The coating shall be mixed and applied in accordance with the manufacturer’s recommendations.

4.3.3 CIM coating shall be classified for potable water contact and shall be certified to meet ANSI/NSF Additives Standard 61 for indirect additives.

5.0 RESPONSIBILITIES

5.1 Government Responsibilities. The Government will be responsible for draining each storage tank and removing all sediment prior to the Contractor commencing work. The Government will be responsible for filling the tanks after sealants are cured when the Contractor instructs the tanks to be filled for purposes of checking for leaks. The Government will fill the tanks according to the Fill Rate Chart in Exhibit E for a foundation sheet thickness of 0.344 inch. The

Government will provide a restricted access worksite.

5.2 Contractor’s Responsibilities. The Contractor will be responsible for performing all work in

Section 3.0 “Description of Work” unless clearly identified as the responsibility of the

Government. The Contractor will be responsible for securing their equipment and supplies when not at the work site. The Government will not be held responsible for theft and vandalism that might occur.

6.0 QUALIFICATIONS OF CONTRACTOR

6.1 The Contractor shall be a licensed and insured general contractor certified by a glass-fused-to-steel tank manufacturer as an authorized dealer and shall comply with tank manufacturer’s requirements for repair and maintenance practices and equipment used on the job. The service and repair crew personnel shall be trained by the tank manufacturer’s sponsored program in all aspects of glass-fused-to-steel tank construction and repair and shall be certified by the tank manufacturer as having satisfactorily completed that program.

6.2 The Contractor shall be certified from a manufacturer specializing in the design, fabrication and erection of factory-applied glass-fused-to-steel, bolt together tank systems. The manufacturer shall employ a staff of full-time engineers, and shall own and operate its production plant, fabricate and glass coat the tank at one location. The Contractor will provide the physical address of the manufacturing facility, the contact name and phone number for the engineering department, and the number of years they have been in business at that location.

6.3 The Contractor must be licensed and insured in the state of New Mexico. The Contractor shall provide the following:

6.3.1 A list of five (5) glass-fused-to-steel water or wastewater tanks located in the state of New Mexico that they have repaired or serviced which have been operating for a minimum of ten years and a detailed description of the type of work that was performed; provide the name, address and complete contact information for the owner of the referenced tanks as well as the name, address and complete contact information of their consulting engineers.

6.3.2 Provide a detailed experience resume for each of the service and repair technicians who will be on site to service and repair the 3 storage tanks (service technician’s experience description shall be limited specifically to their history of glass-fused-to-steel tank service and repair work).

6.3.3 Provide certification from the tank manufacturer that the authorized Contractor meets all qualification requirements listed above.

7.0 SAFETY

7.1 OSHA. The Contractor shall comply with the applicable Occupational Safety and Health

Administration (OSHA) Standards specified under 29 CFR part 1910 and other Federal, State, and local regulations for the purpose of providing safety precautions to employees who are subject to occupational exposure to falls, heat, overexertion, heavy lifting etc. as a result of the work performed under this contract.

7.2 Job Hazard Assessment. The Contractor shall provide a written Job Hazard Assessment (JHA).

A JHA form will be provided by the BGNDRF Facility Manager upon request. Work cannot commence by the Contractor until the Contractor and Facility Manager have signed the JHA.

Actions including personal protective equipment identified in the JHA are mandatory actions.

The Contractor is responsible for each of his/her employees reviewing and adhering to the

JHA before working at BGNDRF. The Contractor’s safety program can be submitted in lieu of a JHA as long as it addresses all hazards that the Contractor will be exposed to at the BGNDRF worksite.

7.3 Training and Education. The Contractor is responsible for providing the necessary training and education to his employees affected by the OSHA standards and ensuring safe and sanitary work conditions for his employees.

7.4 Personal Protective Equipment. The Contractor is also responsible for providing, at no cost to his employees, appropriate personal protective equipment such as, but not limited to, gloves, dust masks, and eye protection (reference section 1910.1030, Bloodborne Pathogens).

Personal Protective Equipment is specialized clothing or equipment worn by an employee for protection against a hazard. General work clothes (e.g., uniforms, pants, shirts, or blouses) not intended to function as protection against a hazard are not considered to be personal protective equipment.

7.5 Safety Data Sheets. The Contractor shall provide the Facility Manager with all Safety Data

Sheets (SDS) for any Contractor furnished chemicals brought to BGNDRF. The Contractor and the Contractor’s employees shall review SDS sheets for chemicals they are using. The

Contractor must remove all Contractor furnished chemicals, sealants, and coatings from

BGNDRF upon completion of the task in which it was required. The Contractor shall notify the

Facility Manager when the Contractor furnished chemicals, sealants and coatings are removed from BGNDRF.

7.6 Covid-19 Protocols and Screening Questions. BGNDRF protocols for preventing the spread of Covid-19 are presented in Exhibit F and must be strictly adhered to. All workers associated with this project must pass the screening questions each day before being allowed on site.

Protocols and screening questions are subject to change with the changing conditions of the pandemic. It is the Contractor’s responsibility to adhere to the restrictions put in place by the state of New Mexico and to stay abreast of any changes in restrictions at BGNDRF. Updates can be accessed at: https://cv.nmhealth.org/public-health-orders-and-executive-orders/

7.7 A date will be established at the BGNDRF pre-work conference for providing BGNDRF specific safety training to the Contractor and appropriate Subcontractors.

8.0 WARRANTY

8.1 The Contractor shall include a warranty for the tank materials and coatings used in the repair maintenance work. As a minimum, this warranty shall provide assurance against defects in material or workmanship for the period of 1 year.

9.0 SUBMITTALS

Submit the following vendor literature, safety data sheets, manufacturer’s specifications and warranty information to the Contracting Officer’s Representative (COR) for the Government’s review and approval prior to commencing work. Purchases prior to the Government’s approval of submittals is at the Contractor’s own risk.

9.1 Qualifications listed in Section 6.3 of this Statement of Work

9.2 CIM 1061 safety data sheet

9.3 Manus Sealer No. 98 safety data sheet

9.4 A Job Hazard Assessment or Contractor’s Safety Program as discussed in Section 7.2 of this Statement of Work

9.5 Warranty for the supplies and materials and work described in this Statement of Work.

9.6 Two schedules: one for one tank at a time (until it is returned to service) and one for overlapping of all three tanks.

9.7 Two prices: one for one tank at a time (until it is returned to service) and one for overlapping of all three tanks.

10.0 FACILITY

10.1 Hours of Access. The Contractor will schedule work for when the facility is open. Business hours are from 7:30 am – 4:30 pm Monday through Friday. Any deviation from these days and hours must be requested of the BGNDRF Facility Manager 48 hours in advance.

Scheduling flexibility may be required due to pandemic related issues.

10.2 Access to the Worksite. The Contractor will be responsible for signing in and out each day in the lobby of the Central Research Building.

https://cv.nmhealth.org/public-health-orders-and-executive-orders/

10.3 Security. The Government reserves the right to perform security checks on Contractor employees.

10.4 Emergencies. Telephones in the building may be used in case of emergency. You must first dial 9 to access phone lines outside of the building. A telephone is in the lobby on the window ledge next to the door to the test bays.

11.0 CONTACT

Contracting Officer’s Representative (COR):

Zach Stoll, Acting BGNDRF Facility Manager

500 LaVelle Road

Alamogordo, NM 88310

Desk Phone: 575-443-6559

Mobile Phone: 575-449-5622

Email: zstoll@usbr.gov

12.0 PERFORMANCE PERIOD

The performance period will be 6 months from date of award.

13.0 PAYMENT

13.1 Payment will be made upon submission of an invoice for the completion of work for each storage tank.

Exhibit A

2016 Storage Tank Inspection Reports and Recommendations

America’s Employee-Owned Leader in Liquid Storage Tank Solutions

Brackish Groundwater – 8041029

Brackish Groundwater National Desalination Facility Alamogordo, New Mexico

Prepared By:

Mike Bray

Engineering America 2/11/2016

Storage Tank 1

Introduction On January 27th, 2016 Engineering America conducted a full visual inspection of the Aquastore water tanks for the Brackish Groundwater National Desalination Facility. In this report you will find a detailed description of our findings, along with photographs from a digital camera to support any recommended action.

Tank Specifications

INSPECTION

NUMBER

708019 INSPECTION

DATE

27-January-2016

PRODUCT Aquastore INSPECTOR(S) Bob Kriha Bob Dejdar

MODEL 2024 SSWT PROJECT NAME Brackish

CAPACITY 50,000 DATE BUILT 2004

SERIAL

NUMBER

8041029 BUILT BY Southwest Aquastore

EXTERIOR

COATING

Tan - Fused Glass INTERIOR

COATING

White - Fused Glass

ROOF TYPE Knuckle – Tan Fused Glass

ROOF BRAND CST

Condition grades: Warranty Info

5 = Like New 4 = Good 3 = Fair 2 = Poor 1 = Needs Immediate Attention

Image Name:

Concrete Curb and Foundation

Condition:

4 = Good

Description:

The concrete curb and foundation are in good condition.

Image Name:

Overflow Discharge

Condition:

4 = Good

Description:

The overflow outlet is in good condition.

The overflow runs to an underground discharge.

Image Name:

Manway Door

Condition:

4 = Good

Description:

The exterior of the manway door is in good condition.

Image Name:

Exterior Tank Ladder

Condition:

4 = Good

Description:

The tank ladder and step-off platforms are in good condition.

Exterior Knuckle Roof

Condition:

4 = Good

Description:

The exterior of the knuckle roof is in good condition.

Image Name:

Roof Vent

Condition:

4 = Good

Description:

The roof vent is in good condition. Both screens are in place with no issues.

Roof Hatch

Condition:

4 = Good

Description:

The roof access hatch is in good condition. The door latches and seals properly.

Image Name:

Exterior Sealer

Condition:

4 = Good

Description:

The sealer on the exterior of the tank is in good condition. All of the sheet-edge surfaces are covered.

Exterior Glass Coating

Condition:

4 = Good

Description:

The glass coating on the exterior of the tank is in good overall condition.

Image Name:

Interior Floor

Condition:

4 = Good

Description:

The floor is in good condition. There was a minor amount of sediment in the tank.

We estimate the sediment to be less than 1” at this time.

Interior Sealer

Condition:

4 = Good

Description:

The sealer on the interior sheet seams is in good condition.

Image Name:

Interior Glass Coating

Condition:

4 = Good

Description:

The glass coating on the interior of the tank is in good condition. There is some bio-film buildup on the sidewall surfaces.

Manway Weldment

Condition:

3 = Fair

Description:

The manway weldment is in fair condition. There is some cathodic activity occurring on to the galvanized coating on the weldment.

Image Name:

Interior Piping

Condition:

3 = Fair

Description:

The interior pipes are in fair condition.

There is some corrosion on the pipes.

Interior Ladder

Condition:

1 = Needs Immediate Attention

Description:

The ladder is corroding severely and should be taken out of service. A hole near one of the rung can be seen in this photo.

Image Name:

Interior Knuckle Roof

Condition:

4 = Good

Description:

Roof and channels are in good condition.

Recommendations Engineering America recommends the following repairs and maintenance to be performed:

WITHIN NEXT YEAR

• Recoat external fill line.

• Install roof walkway system to allow access to the roof mounted gravity ventilator.

• Replace gauge decal on exterior level gauge.

• Perform a water analysis to determine proper level of cathodic protection.

• Clean interior of tank to remove bio-film.

• Touch-up interior sealer.

• Clean and coat manway weldment with an industrial membrane.

WITHIN THREE YEARS

• Inspect the tank in three years.

647 Hale Ave. N.

Oakdale, MN 55128 Ph: 651-777-4041 Fax: 651-777-5312 www.engamerica.com

10629 Widmer Rd.

Lenexa, KS 66215 Ph: 913-782-7774 Fax: 651-777-5312 www.engamerica.com

1001-A #515 E.

Harmony Rd Fort Collins, CO 80525 Ph: 970-962-9400 Fax: 651-777-5312 www.engamerica.com

1820 East Ray Road Chandler, AZ 85225 Ph: 480-895-1106 Fax: 480-802-7704 www.engamerica.com

2966 Industrial Avenue Hubbard, OR 97032 Ph: 503-682-7600 Fax: 503-682-7601 www.engamerica.com

March 8, 2016 Brackish Groundwater National Desalination Research 500 La Velle Road Alamogordo, NM 88310 Attn: Mr. Randy Shaw Phone: 575-443-6553 Email: rshaw@usbr.gov

Subject: 20’ Diameter x 24’ High Water Tank Alamogordo, NM – S/N: 8041029 Tank 1 Inspection Recommendations EAI Proposal No: 00001864

Dear Randy, This proposal is in reply to the tank inspection completed on January 27, 2016 and the repairs recommended by Engineering America, Inc. Please see the pricing below. The tank must be drained, cleaned (by owner), and available for Engineering America Inc. to perform our work before EAI arrives on site. Pricing includes all expenses, labor, and travel to complete the work stated below.

Tank Inspection Recommendations:

1. Interior Sealer Touchup: Touchup the existing sealer on all vertical and horizontal seams on the tank interior and cover the sealer with an industrial membrane for added protection (New sealer and Membrane will be black).

2. Fill Line Repair: EAI will touchup the coating on the external fill pipe.

3. Level Gauge Decal: EAI will install a new level gauge decal on the existing level gauge board.

4. Cathodic Protection System: Replace Cathodic anodes as needed.

a. Owner must supply EAI with a water analysis to confirm the correct number and type of bars to be installed in the tank. Tank Manufacturer to calculate and design cathodic protection system.

b. The tank must be drained for the cathodic to be changed.

5. Roof Handrail: EAI to install a galvanized handrail and walkway from the tank exterior ladder to the roof vent.

6. Manway Repair: EAI will coat the interior of the manway weldment with an industrial membrane.

7. Interior Tank Clean: EAI will pressure wash the bio-film off the tank sidewalls and floor.

EAI will only use a pressure washer for cleaning the tank interior.

Inspection Recommendation Pricing: $39,680.00

Storage Tank 1 http://www.engamerica.com/

Oakdale, MN 55128 Ph: 651-777-4041 Fax: 651-777-5312 www.engamerica.com

10629 Widmer Rd.

Lenexa, KS 66215 Ph: 913-782-7774 Fax: 651-777-5312 www.engamerica.com

1001-A #515 E.

Harmony Rd Fort Collins, CO 80525 Ph: 970-962-9400 Fax: 651-777-5312 www.engamerica.com

1820 East Ray Road Chandler, AZ 85225 Ph: 480-895-1106 Fax: 480-802-7704 www.engamerica.com

2966 Industrial Avenue Hubbard, OR 97032 Ph: 503-682-7600 Fax: 503-682-7601 www.engamerica.com

Our pricing does not include the following items:

• Dumpsters for waste.

• Cleaning the tank interior / exterior.

• Draining / Filling the tank with water.

• Any permits.

• Prevailing wage or union wages.

• Owner/site specific safety requirements or restrictive work rules.

Should you have any questions please feel free to contact me at any time at 651-777-4041.

Sincerely, Engineering America Inc.

Travis Hackworthy Vice President / Regional Manager

Storage Tank 1

Brackish Groundwater – 8041033

Brackish Groundwater National Desalination Facility Alamogordo, New Mexico

Prepared By:

Mike Bray

Engineering America

Storage Tank 2

Introduction On January 27th, 2016 Engineering America conducted a full visual inspection of the Aquastore water tanks for the Brackish Groundwater National Desalination Facility. In this report you will find a detailed description of our findings, along with photographs from a digital camera to support any recommended action.

Tank Specifications

INSPECTION

NUMBER

708019 INSPECTION

DATE

27-January2016

PRODUCT Aquastore INSPECTOR(S) Bob Kriha Bob Dejdar

MODEL 2824 SSWT PROJECT NAME Brackish

CAPACITY 102,000 DATE BUILT 2004

SERIAL

NUMBER

8041033 BUILT BY Southwest Aquastore

EXTERIOR

COATING

Tan - Fused Glass INTERIOR

COATING

White - Fused Glass

ROOF TYPE Knuckle - Tan Fused Glass

ROOF BRAND CST

Condition grades: Warranty Info

5 = Like New 4 = Good 3 = Fair 2 = Poor

Image Name:

Concrete Curb and Foundation

Condition:

4 = Good

Description:

The concrete curb and foundation is in good condition.

Image Name:

Overflow Discharge

Condition:

4 = Good

Description:

The overflow system is in good condition. It discharges underground.

Image Name:

Manway Door

Condition:

4 = Good

Description:

The exterior of the manway door is in very good condition.

Image Name:

Exterior Tank Ladder

Condition:

4 = Good

Description:

The tank ladder and step-off platforms are in good condition.

Image Name:

Exterior Knuckle Roof

Condition:

4 = Good

Description:

The exterior of the knuckle roof is in very good condition.

Image Name:

Roof Vent

Condition:

4 = Good

Description:

The roof vent is in good condition. Both screens are in place with no issues.

Image Name:

Roof Hatch

Condition:

4 = Good

Description:

The roof access hatch is in good condition. The door latches and seals properly.

Image Name:

Exterior Sealer

Condition:

4 = Good

Description:

The sealer on the exterior of the tank is in good condition. All of the sheet-edge surfaces are covered.

Image Name:

Exterior Glass Coating

Condition:

4 = Good

Description:

The glass coating on the exterior of the tank is in good condition.

Image Name:

Interior Floor

Condition:

4 = Good

Description:

The floor is in good condition. There was a minor amount of sediment in the tank.

We estimate the sediment to be less than 1” at this time.

Image Name:

Interior Sealer

Condition:

4 = Good

Description:

The sealer on the interior sheet seams is in good condition.

Image Name:

Interior Glass Coating

Condition:

4 = Good

Description:

The glass coating on the interior of the tank is in good condition. There is some bio-film buildup on the sheet surfaces.

Image Name:

Interior Ladder

Condition:

1 = Needs Immediate Attention

Description:

The interior ladder poor condition. It is corroded and should be taken out of service.

Image Name:

Interior Piping

Condition:

2 = Poor

Description:

The interior pipes are in poor condition.

They are corroding and should be coated with an industrial membrane.

Recommendations Engineering America recommends the following repairs and maintenance to be performed:

WITHIN NEXT YEAR

• Recoat external fill line.

• Install roof walkway system to allow access to the roof mounted gravity ventilator.

• Replace gauge decal on exterior level indicator.

• Perform a water analysis to determine proper level of cathodic protection.

• Clean interior of tank to remove bio-film.

• Touch-up interior sealer.

• Clean and coat manway weldment with an industrial membrane.

WITHIN THREE YEARS

• Inspect the tank within three years.

Oakdale, MN 55128 Ph: 651-777-4041 Fax: 651-777-5312 www.engamerica.com

10629 Widmer Rd.

Lenexa, KS 66215 Ph: 913-782-7774 Fax: 651-777-5312 www.engamerica.com

1001-A #515 E.

Harmony Rd Fort Collins, CO 80525 Ph: 970-962-9400 Fax: 651-777-5312 www.engamerica.com

1820 East Ray Road Chandler, AZ 85225 Ph: 480-895-1106 Fax: 480-802-7704 www.engamerica.com

2966 Industrial Avenue Hubbard, OR 97032 Ph: 503-682-7600 Fax: 503-682-7601 www.engamerica.com

March 8, 2016 Brackish Groundwater National Desalination Research 500 La Velle Road Alamogordo, NM 88310 Attn: Mr. Randy Shaw Phone: 575-443-6553 Email: rshaw@usbr.gov

Subject: 20’ Diameter x 24’ High Water Tank Alamogordo, NM – S/N: 8041029 Tank 2 Inspection Recommendations EAI Proposal No: 00001867

Dear Randy, This proposal is in reply to the tank inspection completed on January 27, 2016 and the repairs recommended by Engineering America, Inc. Please see the pricing below. The tank must be drained, cleaned (by owner), and available for Engineering America Inc. to perform our work before EAI arrives on site. Pricing includes all expenses, labor, and travel to complete the work stated below.

Tank Inspection Recommendations:

1. Interior Sealer Touchup: Touchup the existing sealer on all vertical and horizontal seams on the tank interior and cover the sealer with an industrial membrane for added protection (New sealer and Membrane will be black).

2. Fill Line Repair: EAI will touchup the coating on the external fill pipe.

3. Level Gauge Decal: EAI will install a new level gauge decal on the existing level gauge board.

4. Cathodic Protection System: Replace Cathodic anodes as needed.

a. Owner must supply EAI with a water analysis to confirm the correct number and type of bars to be installed in the tank. Tank Manufacturer to calculate and design cathodic protection system.

b. The tank must be drained for the cathodic to be changed.

5. Roof Handrail: EAI to install a galvanized handrail and walkway from the tank exterior ladder to the roof vent.

6. Manway Repair: EAI will coat the interior of the manway weldment with an industrial membrane.

7. Interior Tank Clean: EAI will pressure wash the bio-film off the tank sidewalls and floor.

EAI will only use a pressure washer for cleaning the tank interior.

Inspection Recommendation Pricing: $40,820.00

Storage Tank 2

This is likely a mistake and the S/N should be 8041033. RS

Oakdale, MN 55128 Ph: 651-777-4041 Fax: 651-777-5312 www.engamerica.com

10629 Widmer Rd.

Lenexa, KS 66215 Ph: 913-782-7774 Fax: 651-777-5312 www.engamerica.com

1001-A #515 E.

Harmony Rd Fort Collins, CO 80525 Ph: 970-962-9400 Fax: 651-777-5312 www.engamerica.com

1820 East Ray Road Chandler, AZ 85225 Ph: 480-895-1106 Fax: 480-802-7704 www.engamerica.com

2966 Industrial Avenue Hubbard, OR 97032 Ph: 503-682-7600 Fax: 503-682-7601 www.engamerica.com

Our pricing does not include the following items:

• Dumpsters for waste.

• Cleaning the tank interior / exterior.

• Draining / Filling the tank with water.

• Any permits.

• Prevailing wage or union wages.

• Owner/site specific safety requirements or restrictive work rules.

Should you have any questions please feel free to contact me at any time at 651-777-4041.

Sincerely, Engineering America Inc.

Travis Hackworthy Vice President / Regional Manager

Storage Tank 2

Brackish Groundwater - 8049042

Brackish Groundwater National Desalination Facility Alamogordo, New Mexico

Prepared By:

Mike Bray

Engineering America

Storage Tank 3

Introduction On January 27th, 2016 Engineering America conducted a full visual inspection of the Aquastore water tanks for the Brackish Groundwater National Desalination Facility. In this report you will find a detailed description of our findings, along with photographs from a digital camera to support any recommended action.

Tank Specifications

INSPECTION

NUMBER

708019 INSPECTION

DATE

27-January-2016

PRODUCT Aquastore INSPECTOR(S) Bob Kriha Bob Dejdar

MODEL 2024 SSWT PROJECT NAME Brackish Ground Water National Desalination

CAPACITY 50,000 DATE BUILT 2004

SERIAL

NUMBER

8049042 BUILT BY Southwest Aquastore

EXTERIOR

COATING

Tan - Fused Glass INTERIOR

COATING

White - Fused Glass

ROOF TYPE Knuckle - Tan Fused Glass

ROOF BRAND CST

Condition grades: Warranty Info

5 = Like New 4 = Good 3 = Fair 2 = Poor

Image Name:

Concrete Curb and Foundation

Condition:

4 = Good

Description:

The concrete curb and foundation were inspected and found to be in good condition.

Image Name:

Overflow Discharge

Condition:

4 = Good

Description:

The overflow outlet has been inspected and found to be in good condition. The discharge runs under ground.

Image Name:

Manway Door

Condition:

4 = Good

Description:

The exterior of the manway door is in good condition.

Image Name:

Exterior Tank Ladder

Condition:

4 = Good

Description:

The tank ladder and step-off platforms are in good condition.

Image Name:

Exterior Knuckle Roof

Condition:

4 = Good

Description:

The exterior of the knuckle roof is in good condition.

Image Name:

Roof Vent

Condition:

4 = Good

Description:

The roof vent is in good condition. Both screens are in place with no issues.

Image Name:

Roof Hatch

Condition:

4 = Good

Description:

The roof access hatch is in good condition. The door latches and seals properly.

Image Name:

Exterior Sealer

Condition:

4 = Good

Description:

The sealer on the exterior of the tank is in good condition. All of the sheet-edge surfaces are covered.

Image Name:

Exterior Glass Coating

Condition:

4 = Good

Description:

The glass coating on the exterior of the tank is in good condition.

Image Name:

Interior Floor

Condition:

4 = Good

Description:

The concrete floor is in good condition.

There was a minor amount of sediment in the tank. We estimate the sediment to be less than 1” at this time.

Image Name:

Interior Sealer

Condition:

4 = Good

Description:

The sealer on the interior sheet seams is in good condition.

Image Name:

Interior Glass Coating

Condition:

4 = Good

Description:

The glass coating on the interior of the tank is in good condition. However it is stained with mineral sediments.

Image Name:

Interior Ladder

Condition:

1 = Needs Immediate Attention

Description:

The interior ladder has a hole in it from corrosion. This ladder should be taken out of service.

Image Name:

Interior Piping

Condition:

3 = Fair

Description:

The interior riser pipe is in fair condition.

The piping should be cleaned and coated with an industrial membrane.

Image Name:

Interior Knuckle Roof

Condition:

4 = Good

Description:

The roof channels look to be in good condition as well as the roof surface and sealer around the perimeter of the roof.

Recommendations Engineering America recommends the following repairs and maintenance to be performed:

WITHIN NEXT YEAR

• Install roof walkway system to allow access to the roof mounted gravity ventilator.

• Replace gauge decal on exterior level indicator.

• Perform a water analysis to determine proper level of cathodic protection.

• Clean interior of tank to remove bio-film.

• Touch-up interior sealer.

• Clean and coat manway weldment with an industrial membrane.

WITHIN THREE YEARS

• Inspect the tank within three years.

Oakdale, MN 55128 Ph: 651-777-4041 Fax: 651-777-5312 www.engamerica.com

10629 Widmer Rd.

Lenexa, KS 66215 Ph: 913-782-7774 Fax: 651-777-5312 www.engamerica.com

1001-A #515 E.

Harmony Rd Fort Collins, CO 80525 Ph: 970-962-9400 Fax: 651-777-5312 www.engamerica.com

1820 East Ray Road Chandler, AZ 85225 Ph: 480-895-1106 Fax: 480-802-7704 www.engamerica.com

2966 Industrial Avenue Hubbard, OR 97032 Ph: 503-682-7600 Fax: 503-682-7601 www.engamerica.com

Brackish Groundwater National Desalination Research 500 La Velle Road Alamogordo, NM 88310 Attn: Mr. Randy Shaw Phone: 575-443-6553 Email: rshaw@usbr.gov

Subject: 20’ Diameter x 24’ High Water Tank Alamogordo, NM – S/N: 8049042 Tank 3 Inspection Recommendations EAI Proposal No: 00001868

Dear Randy, This proposal is in reply to the tank inspection completed on January 27, 2016 and the repairs recommended by Engineering America, Inc. Please see the pricing below. The tank must be drained, cleaned (by owner), and available for Engineering America Inc. to perform our work before EAI arrives on site. Pricing includes all expenses, labor, and travel to complete the work stated below.

Tank Inspection Recommendations:

1. Interior Sealer Touchup: Touchup the existing sealer on all vertical and horizontal seams on the tank interior and cover the sealer with an industrial membrane for added protection (New sealer and Membrane will be black).

2. Level Gauge Decal: EAI will install a new level gauge decal on the existing level gauge board.

3. Cathodic Protection System: Replace Cathodic anodes as needed.

a. Owner must supply EAI with a water analysis to confirm the correct number and type of bars to be installed in the tank. Tank Manufacturer to calculate and design cathodic protection system.

b. The tank must be drained for the cathodic to be changed.

4. Roof Handrail: EAI to install a galvanized handrail and walkway from the tank exterior ladder to the roof vent.

5. Manway Repair: EAI will coat the interior of the manway weldment with an industrial membrane.

6. Interior Tank Clean: EAI will pressure wash the bio-film off the tank sidewalls and floor.

EAI will only use a pressure washer for cleaning the tank interior.

Inspection Recommendation Pricing: $38,200.00

Storage Tank 3

March 8, 2016

Oakdale, MN 55128 Ph: 651-777-4041 Fax: 651-777-5312 www.engamerica.com

10629 Widmer Rd.

Lenexa, KS 66215 Ph: 913-782-7774 Fax: 651-777-5312 www.engamerica.com

1001-A #515 E.

Harmony Rd Fort Collins, CO 80525 Ph: 970-962-9400 Fax: 651-777-5312 www.engamerica.com

1820 East Ray Road Chandler, AZ 85225 Ph: 480-895-1106 Fax: 480-802-7704 www.engamerica.com

2966 Industrial Avenue Hubbard, OR 97032 Ph: 503-682-7600 Fax: 503-682-7601 www.engamerica.com

Our pricing does not include the following items:

• Dumpsters for waste.

• Cleaning the tank interior / exterior.

• Draining / Filling the tank with water.

• Any permits.

• Prevailing wage or union wages.

• Owner/site specific safety requirements or restrictive work rules.

Should you have any questions please feel free to contact me at any time at 651-777-4041.

Sincerely, Engineering America Inc.

Travis Hackworthy Vice President / Regional Manager

Storage Tank 3

Exhibit B

2018 Storage Tank Inspection Reports and Recommendations

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

Tank Inspection Report

Project Name: Talerosa Desal

Address: Alamogordo, NM

Tank Model: 2024 SSWT with Knuckle Roof

MIP 8041029 (Tank 1)

Potable Water Tank

On October 27th, 2018, an inspection of the Aquastore Tank Model 2024 Water Tank was performed by Christopher

Martin and Michael Fryar, both certified Texas Aquastore, Inc. employees. The purpose of the tank inspection was to establish the current condition of the tank, and determine any deficiencies in the tank coating, tank appurtenances, knuckle roof, and/or bolt seam sealer.

FOUNDATION

The concrete curb is in good condition. The sheet and concrete interfaces are liquid tight. No running or pooling water was observed.

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

EXTERIOR TANK

The exterior sealer fillets are in fair/good condition and showing minimal signs of aging and/or weathering. The existing sealer continues to provide adequate protection to the panel edges. In its current condition the exterior sealer could remain viable for another 3-5 years, or longer.

The condition of the glass coating on the panel surface showed no evidence of chips or surface rust at the time of inspection. Care should always be taken anytime any work is in progress near the tank as not to cause future chips.

Newly chipped glass should be touched up as soon as possible.

The tank had no exterior sidewall leaks. Tank decals are legible and easy to read. Most appurtenances appeared to be in good condition, including piping, the ladder assembly, and the top manway platform. The 30” bottom manway still allows for a water tight seal but has some issues we address later on this report. The full-travel liquid level gauge is difficult to read and could stand to have new decals put on it.

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

KNUCKLE ROOF

The knuckle roof is in good condition. The sealer fillets are thorough and still provide complete coverage of the sheet edges to prevent rain water from entering the tank. The fasteners are in good condition. The vent and roof hatch are in good working order as well. There is one area of damage on a panel just above the knuckle. (see top right pic) This area should touched-up soon, before the rusting penetrates the roof panels.

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

INTERIOR OF TANK

The interior sealer fillets are in fair condition but showing significant signs of aging. The existing sealer continues to provide adequate protection to the panel edges, but there are several areas of rusting at bolt hole locations. In its current condition the interior sealer could remain viable for another 3-5 years. The tank’s Cathodic Protection system does not seem to be performing properly. The CP system seems to be tied into the lightening protection system. (see bottom middle pic) This needs to be corrected immediately. There is minimal rusting on the bottom rungs of the interior ladder. This should continue to be monitored to ensure the safety and performance of the ladder.

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

ACCESSORIES

The ladder cage and platform are in good condition. The ladder is lockable and all piping seems to be in good working order. The exterior of the manway is in good shape and not leaking, but the interior of the manway is showing signs of significant rusting. This is not currently affecting tank performance and doesn’t show signs of being an immediate problem. It should continue to be monitored moving forward to ensure it doesn’t begin leaking and become an issue.

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

RECOMMENDATIONS

The tank is in fair serviceable condition.

We recommend replacing the decals on the liquid level and having the damaged knuckle roof panel touched-up to ensure longevity and continued performance. Additionally, the CP system needs to be reinstalled/rewired, so the lightening protection system is isolated from the CP system. Also, with the noticeable rusting at several bolt hole locations, we would recommend a complete interior seam reseal with CIM 1061 in next 1-2 years to ensure leak-free performance of the tank.

All interior and exterior fillets should always be monitored over time to determine if the fillets have pulled away from the panel edge or become excessively weathered or cracked. Special attention should be given to the sealer fillets on the exterior.

A periodic tank maintenance plan should be followed to monitor the performance of the panel edge sealer fillets. By monitoring the performance of the sealer, whenever the sealer has reached the end of its serviceable life, either partial or complete re-caulk can be performed before any metal loss occurs, especially along panel edges and bolt seams. This type of metal loss can lead to a significant cost, which can be avoided by a re-caulk to the panel edges and the bolt seams, when needed. It is critical to the continued structural integrity of the Tank. We recommend that TAI be employed to perform the continued inspection service at the appropriate intervals. In potable water service, the tank interior should be visually inspected at least every five (5) years, or more often for more aggressive or corrosive stored liquids.

Chad Callahan

Vice President of Operations

Texas Aquastore, Inc.

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

Project Name: Talerosa Desal

Address: Alamogordo, NM

Tank Model: 2824 SSWT with Knuckle Roof

MIP 8041033 (Tank 2)

Potable Water Tank

On October 27th, 2018, an inspection of the Aquastore Tank Model 2824 Water Tank was performed by Christopher

Martin and Michael Fryar, both certified Texas Aquastore, Inc. employees. The purpose of the tank inspection was to establish the current condition of the tank, and determine any deficiencies in the tank coating, tank appurtenances, knuckle roof, and/or bolt seam sealer.

FOUNDATION

The concrete curb is in good condition. The sheet and concrete interfaces are liquid tight. No running or pooling water

1422 West Houston Street Sherman, TX 75092 Ph: 903.870.5000 Fax: 903.840.5004 www.texas-aquastore.com

The exterior sealer fillets are in fair/good condition and showing minimal signs of aging and/or weathering. The existing sealer continues to provide adequate protection to the panel edges. In its current condition the exterior sealer could remain viable for another 3-5 years, or longer.

The condition of the glass coating on the side panel surfaces showed no evidence of chips or surface rust at the time of inspection. Care should always be taken anytime any work is in progress near the tank as not to cause future chips.

Newly…