Vista City Council
May 13, 2025

Terms of Delivery: PP/Add Order Position
Terms of Payment: 90% N30 after invoice date; 10% NTE 90 days after initial invoice date.

Xylem’s payment shall not be dependent upon Purchaser being paid by any third party unless Owner denies payment due to reasons solely attributable to items related to the equipment being provided by FLYGT.

Validity: This Quote is valid for ninety (90) days.

Schedule: Submittals will be supplied 1-2 weeks after order acceptance.

Schedule: Delivery lead times are approximately 10 weeks after receipt of submittal approval and order acceptance.

Start Up: One (1) day Start Up / Owner Training is included.

Warranty: Xylem Water Solutions USA, Inc.offers a commercial warranty to the original end purchaser against defects in workmanship and material.

Changes: This Quotation is based on the current design criteria provided to Xylem Water Solutions USA, Inc. Revisions may result in price changes.

Exclusions: This Quote includes only the items listed specified above.

Sincerely,

Alan Dahlqvist
Direct Sales Representative

Cell: 951/553-1493
[email protected]

05/13/2025 C9 266 of 1078

May 4, 2021

HDR Water/Wastewater Staff Engineer
3230 El Camino Real, Suite 200
CA 92602
Quote # 2021-LAB-0297
Project Name: Vista Raceway
Job Name:
4640 Portacleanse
Qty Part Number Description
1 4640.492-0470 Flygt Model SR-4640 Submersible Mixer, Stainless steel (ASTM 316L), equipped with a 460 Volt / 3 phase / 60 Hz 4 HP 855 RPM motor, Prop 5°, 50 Ft. length of SUBCAB 4G2,5+2x1,5 submersible cable, C/W FLS leakage detector Mixer is also available in 304SS (lower price)
1 14-58 79 34 STAND,PORTA-CLEANSE 4630/40 SS
1 14-69 00 09A START UP,FLYGT,NO TAX 1-TP MODELS: 3000,7000,8000 1 14-58 72 08 KIT,CHAIN FITTING 3067-3127+ 316SS
20 14-48 71 13 CHAIN,3/16" 316L
1 14-40 71 29 MINI-CASII/FUS 120/24VAC,24VDC
1 14-40 70 97 SOCKET,11 PIN OCTAL DIN MOUNT
4640 Portacleanse Price USD $ 16,891.20
Freight Charge $ 654.00
Total Price $ 17,545.20
Terms & Conditions
This order is subject to the Standard Terms and Conditions of Sale – Xylem Americas effective on the date the order is accepted which terms are available at http://www.xyleminc.com/en-us/Pages/terms-conditions-of-sale.aspx and incorporated herein by reference and made a part of the agreement between the parties.

Purchase Orders: Please make purchase orders out to: Xylem Water Solutions USA, Inc.

Freight Terms: 3 DAP - Delivered At Place 08 - Jobsite (per IncoTerms 2020) See Freight Payment (Delivery Terms) below.

Taxes: State, local and other applicable taxes are not included in this quotation.

Back Charges: Buyer shall not make purchases nor shall Buyer inc ur any labor that would result in a back charge to Seller without prior written consent of an authorized employee of Seller.

Shortages: Xylem will not be responsible for apparent ship ment shortages or damages incurred in shipment that are not reported within two weeks from delivery to the jobsite. Damages should be noted on the receiving slip and the truck driver advised of the damages. Please contact our office as soon as possible to report damages or shortages so that replacement items can be shipped and the appropriate claims made.

Xylem Water Solutions USA, Inc.

Flygt Products
11161 Harrel Street
Mira Loma, CA 91752
Tel (951) 332-3668
Fax (951) 332-3679
05/13/2025 C9 267 of 1078

Terms of Delivery: PP/Add Order Position
Terms of Payment: 90% N30 after invoice date; 10% NTE 90 days after initial invoice date.

Xylem’s payment shall not be dependent upon Purchaser being paid by any third party unless Owner denies payment due to reasons solely attributable to items related to the equipment being provided by FLYGT.

Validity: This Quote is valid for ninety (90) days.

Schedule: Submittals will be supplied 1-2 weeks after order acceptance.

Schedule: Delivery lead times are approximately 10 weeks after receipt of submittal approval and order acceptance.

Start Up: One (1) day Start Up / Owner Training is included.

Warranty: Xylem Water Solutions USA, Inc.offers a commercial warranty to the original end purchaser against defects in workmanship and material.

Changes: This Quotation is based on the current design criteria provided to Xylem Water Solutions USA, Inc. Revisions may result in price changes.

Exclusions: This Quote includes only the items listed specified above.

Sincerely,

Alan Dahlqvist
Direct Sales Representative

Cell: 951/553-1493
[email protected]

05/13/2025 C9 268 of 1078

1 ©Environmental Leverage Inc. • 630-906-9791 • 812 Dogwood Dr. Suite A, North Aurora, IL 60542 • EnvironmentalLeverage.com

Product Application Guide for Adding Bioaugmentation Product to Lift Stations, Drains & Wetwells Lift stations commonly end up with build-ups of grease th at can create a ring around the lift station; collection build-up on pumps, chains, floats, sidewalls, etc. This ca n cause mechanical problems, cause plugging, interrupt service and cause terrible odors. Operators know what that means: jetting the lines, pumping & hauling off the grease at high costs, or even digging up and replacing a wet well and/or feeder lines at extremely high capital costs.

Grease is one waste that the sewer system cannot handle and therefore needs to be kept out of the system, but most often is not. An additional concern is that since the government raised the temperature required by restaurants and food establishments from 180° F to ~210° F, grease traps are not working as designed and grease that used to be trapped onsite is now washing through the lines until the temperature of the water cools down and then hardens later on. This usually happens somewhere in the lines or in the lift station.

Biological additives are a safe, natural, environmental friendly way to help assist in the cleaning up of a lift station, but they are not miracle workers. There is a limit to what they can do, how they do it and when they will work. Bacteria can naturally degrade the fats, oils and grease, as well as any other organic materials that enter a lift station of pipe. They actually consume these as a food source, as opposed to traditional methods of surfactants, enzymes or chemicals that may have eliminated the grease in the lift station, but just transferred them down the pipe and eventually into the wastewater treatment plant and can cause upset conditions. Biological products cannot in a realistic time degrade some of the solids such as plastics, floatables, etc. that wind up in the lift station. Some of these eventually build up and must be mechanically removed.

Bacteria such as MicroBlock™ Solid block, MicroClear 207™, & MicroSolv L100™ not only clean the lift stations if properly applied, they can help clean up the lines and can lighten the load at the treatment plant and reduce solids or help with BOD and TSS loading. Again, it is all in the program addition; conditions such as flow, temperature and loading that impact whether a program will impact just the lift station, the pipes or the plant. At Environmental Leverage, Inc., we have 3 different types of products for wet wells, manholes and lift stations.

Liquid Bioaugmentation Products: We have liquids MicroSolv L100™ or MicroClear 1XFHC™ that we recommend when there is an extremely high level of grease built up to get started or for applications where an automatic pump is desired for slow periodic or continual feeding. Typical dosing rates for Grease Traps: For 20 cubic ft. or less - 4-5 oz. of product daily should be added by pouring in the sink or pipe closest to the grease trap.

This should be done during night shift cleanup, weekends or during downtime when trap is used the least. After adding, wash down with a cup of warm water. For extreme build ups of grease, add 1 cup of fertilizer high in N and P once a week to help with the biodegradation. For grease traps larger than 20 cubic feet, add 8-10 oz. daily and follow the same procedure.
05/13/2025 C9 269 of 1078
2 ©Environmental Leverage Inc. • 630-906-9791 • 812 Dogwood Dr. Suite A, North Aurora, IL 60542 • EnvironmentalLeverage.com Drain Lines and collection systems:
2” 4 oz. 2 times/ week
4” 8 oz. 2 times/ week
6” 12 oz. 2 times/ week
8” 16 oz. 2 times/ week
Add the product a minimum of twice a week to max of four times a week depending upon the flow and loading.

Add product by pouring directly into the drain or collection system. Add 1-2 cups of fertilizer high in N and P once a week depending upon the size of the pipe to speed up biodegradation.

Bioaugmentation Blocks for lift stations and wet wells:

MicroBlock™ is a solid, bacterial laden, brick for use in degrading organic waste grease traps. The safe, naturally occurring bacteria are present in high numbers to handle difficult organic problems. The unique brick will gradually dissolve over a 35-120 day period which allows for continuous treatment and degradation of waste. The naturally occurring bacteria contained in the block will reduce odor, sludge, fats, oils and grease buildup.

DOSAGE RATE GUIDELINES
Product Size of system Typical application rate Flow rate 2 Pound Brick 15-25 Gal. Trap 35-60 Days flows less than 50,000 gpd 5 Pound Brick 50-150 Gal Trap 45-75 Days flows 50,000-100,000 gpd 10 Pound Brick 250-500 Ga l Trap 60-90 Days flows >100,000 gpd Application: MicroBlock™ gives round the clock waste degradation treatment with a simple, easy to use system. Simply suspend the MicroBlock™ into the treatment area, hanging the block ½ the way into the grease trap below the water line. The brick will dissolve over a 35-120 day period, depending on size and flow rates in a typical grease trap providing optimal efficiency and treatment. Try to place in the opposite side of the incoming flow. For a lift station suspend the block below the liquid line and raise the float so the level will be above the grease ledge problem. Hang the block in the lowest flow rate in the lift station so it’s not in the fast flow influent.

Dry Bioaugmentation products:

MicroClear-207™ is a high potency, bacteria-laden, powdered formulation, for use in degrading many types of waste. MicroClear-207™ contains a specially formulated, proprietary blend of microorganisms, micro/macronutrients, and surface tension suppressants/penetrants. Because of the diversity of the microorganism systems incorporated into this product it is specifically developed for use in municipal or food processing uses for which there requires a particular high impact on fats, oil and grease. The safe, naturally occurring bacteria are present in high numbers to handle difficult organic problems and are very economical. “MicroClear-207™” is packaged in one lb. water soluble bags, 25 lbs. per pail.
05/13/2025 C9 270 of 1078
3 ©Environmental Leverage Inc. • 630-906-9791 • 812 Dogwood Dr. Suite A, North Aurora, IL 60542 • EnvironmentalLeverage.com

APPLICATION INSTRUCTIONS - SEWERS AND LIFT STATIONS
Flow Rate Initial Dosage Maintenance**
Up to 25,000gpd 1lb. per week ½ lb. per week
Up to 50,000gpd 1lb. 2x week 1 lb. per week
Up to 100,000gpd 1lb. every other day 1 lb. 2x week
Up to 250,000gpd 1lb. per day 1 lb. 3x week
Add the 1-lb. water soluble bag directly into the water in the lift station.

Make sure it lands in the water, & not on the surface of a grease ledge or solid build up. If needed, raise the float 1-2 inches above a grease ledge so that any of the bioaugmentation products can have easy access to the grease. "How Critical are the Critical 5 plus one"
Ok, so what exactly are the "Critical 5 plus one"?
I have never heard of that. There are 5 critical measurements that should be monitored and controlled if possible to effectively increase biological degradation efficiently; Temperature, D.O., Ammonia, Ortho-phosphate and pH are the five critical variables regardless of any application for biological activity.

Acceptable environmental parameters for biological activity including:

Parameter Acceptable Optimum
Dissolved Oxygen >0.5 mg/l 1.0 - 2.0 mg/l
Temperature 50 - 95° F 77 - 95 ° F
pH 6.0 - 9.0 7.0 - 7.5
Ammonia Residual 1.0 - 3.0 mg/l 2.0 - 3.0 mg/l
Ortho-phosphate Residual 0.5 - 2.0 mg/l 1.0 - 2.0 mg/l Typically in lift stations if flow is high enough, there is sufficient DO. pH is usually in the neutral range.

Temperature is relatively normal, since hot water from many areas slowly cools down in the pipes and most pipes are underground to prevent freezing, so temps do not get too cold. Usually the main thing lacking in lift stations, especially where high grease is found is sufficient N and P.

We recommend purchasing a bag of fertilizer at your local hardware store, high in N and P values, and adding 1-2 cups to your application 1-2 times a week regardless of which type of biological product you are using. You would be amazed at how such a small thing can make a large difference.

How do I know if the product is working? The correct dosing and application will impact different variables and determine the impact on all three places. In the past, bacterial vendors or sanitary workers worried only about the lift station. Cleaning up the grease and quickly was the only concern. High levels of bacteria were added to the lift station. This may have cleaned up the lift station, but it just moved the grease down the pipes, clogged up the lines and caused high foaming at the treatment plant. Newer more conservative methods are now used to successfully dose a biological program in a lift station. 05/13/2025 C9 271 of 1078
4 ©Environmental Leverage Inc. • 630-906-9791 • 812 Dogwood Dr. Suite A, North Aurora, IL 60542 • EnvironmentalLeverage.com Slower is better, although many people are anxious and say the product is not working.

What are signs that the product is working- Foaming in the lift station- white foam at first shows the bugs are in a high growth phase, as the foam turns to a light brown, they are getting a little older.

Are there signs of the grease softening?
Are there visible signs of cracks in what was once a solid surface? Make sure the biological product is in the water and not just sitting on top of the grease shelf. The product cannot jump out of the water-soluble bag. It needs some access to the water in order to move around, below and above the grease. Try adjusting the water levels in
the lift station and move the float a bit higher.

If there is a grease ledge, this is very important, since the water level must be a bit higher for a short period of time to allow the bacteria access to this grease and not just during high flows.

Spaces between the grease, white coloring of the water, some softening and foaming show the product is starting to work. More free space in the lift station, cleaner lines and floats show the product is doing a good job and on the way to a cleaner lift station.

Photographs above show various grease buildup.

These round solids have been calle d "Floating Turtles"- Hard solid formations that float around in the lift station. Thes e can interfere with the pumps and can clog the pipes. Sometimes using a liquid product to spray on these can help reduce their size and shrink them faster. Raising or lowering the float will not impact situations with turtles.

Cracks starting to form in thick hardened grease indicate the biological program is working. Application of product is improper here, pink product all over the top of the grease and not really in contact with the water.

White milky water indicating bacteria is starting to work, cracks are starting to form in the grease; it is starting to soften and a little foaming is present 05/13/2025 C9 272 of 1078
5 ©Environmental Leverage Inc. • 630-906-9791 • 812 Dogwood Dr. Suite A, North Aurora, IL 60542 • EnvironmentalLeverage.com This is how it looked
before bacterial product
(bioaugmentation)
was introduced.

There were thick solids
built up in the corner
Here is how it looks now
after using
Environmental Leverage’s
bacterial products to
remove the grease.

Case Histories: Grease Control & Lift-station Maintenance Lift stations are notorious for filling up with debris, solids and tons of grease. The grease can become hard, form a shelf or ledge, or if too much, almost create a solid layer. By using bacterial products to clean the grease, a long term solution is established for the lift station. The bacteria also benefit the pipes downstream as well as the wastewater treatment plant.

The bacteria actually consume the grease as a food source and permanently remove the grease. Low maintenance dosages can then be used to keep the grease from building up and causing future problems.

This is a 5 Million Gallon a Day lift station that was filled with years of grease build-up.

Except for a little bit of solids in the upper left corner, most of the grease and solids build-up are gone. Here is the upper right corner- clean and free flowing water as opposed to the above picture prior to addition of our biological products. The grease ledge is gone, the solids and chucks of grease are dissolved and there is circulation of water and better mixing.

Please let us know if you have any questions.

Please see our additional troubleshooting newsletters;
September 06’ Collection systems newsletter, I need to get rid of grease in my lift stations 10-07 Grease and Septicity Newsletter, January 05 Grease seminar newsletter.

Reach our friendly staff @ 630-906-9791
[email protected]
www.EnvironmentalLeverage.com
05/13/2025 C9 273 of 1078
Application Sewer, Lift Stations & Wet Wells for FOG Control 


 

2 - lb. MicroBlock™ 35-60 Days flows less than 50,000 gpd 5 - lb. MicroBlock™ 45-75 Days flows 50,000-100,000 gpd 10 - lb. MicroBlock™ 60-90 Days flows >100,000 gpd
MicroBlock?



 








Product Advantages
* Allows for 24 hour continuous treatment of waste,
not just periodic dosage
* Greatly reduces labor time needed for dosage
maintenance
* Reduces hydrogen sulfide & sludge buildup
* Easy to use
* Significantly reduces malodors
* Cost effective & reduces the need for pump-outs and
dredging
* Breaks down fat & grease buildup (FOG)
* Eliminates need for metering pump - no initial or
maintenance cost
* Eliminates need for personnel to dose other types of
treatments daily or weekly
* Automates septic and grease trap maintenance
program
Packaging of Product
2lb. / 4 per Case
5lb. / 4 per Case
10lb. / 4 per Case
Applications of Use

LIFT STATIONS

WET WELLS

SUMP PITS

DIGESTERS

SLUDGE TANKS

SEWER MAINS

LATERALS

GREASE TRAPS
AERATION SBR’S
LAGOON’S

TRICKLING FILTERS

DRAIN LINES
Degrades
(FOG)
Fats, Oils & Grease
Starches
Protein
Malodors
Animal Fat
Organics
Triglycerides
Foaming
Surfactants
Soaps
Reduces BOD
 



 
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MicroBlock? is a solid, bacterial laden, slow release block for use in degrading organics. The safe, naturally occurring bacteria are present in high numbers to handle difficult organic problems. The unique block will gradually dissolve over a 30-90 day period which allows for continuous treatment and degradation of waste. The naturally occurring bacteria contained in the block will reduce odor, sludge, fats, oils and grease buildup.

Biological products offer a more efficient alternative to chemicals. They actually degrade the grease and organics at the source. The MicroBlock? is suspended below the water level and provides slow, continuous release for the bacteria. 


 











05/13/2025 C9 274 of 1078
MicroBlock? gives round the clock waste degradation treatment with a simple, easy to use system. Simply suspend the MicroBlock? into the treatment area, hanging the MicroBlock? ½ the way into the lift station liquid, wet well, grease trap or pre-treatment site. The block will dissolve over a 30-90 day period, depending on size and flow ra tes in a typical lift stations or wet wells, providing optimal efficiency and treatment.

Degrades
(FOG)
Fats, Oils & Grease
Starches
Protein
Malodors
Animal Fat
Organics
Triglycerides
Foaming
Surfactants
Soaps
Reduces BOD
 



 
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www.EnvironmentalLeverage.com
Typical Properties of Product
11'#2#/%'.'&+5.
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, 2 lb. MicroBlock
Start taking the
Grease & Scum
out of your system
Today!



 











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05/13/2025 C9 275 of 1078
1 15 Oro Beach Drive, Oroville, WA 98844 Tel: 800-641-1726 Email: [email protected]

PROPOSAL
DATE: April 7, 2021
PHI PROJECT: 21-031
SUBJECT: City of Vista, CA – Buena & Raceway Pump Stations ENGINEER: HDR Engineers
MANUFACTURER: Pulsed Hydraulics Inc.

REPRESENTATIVE: JBI Water & Wastewater
PHI would be pleased to provide the following equipment to meet the mixing requirements of the Large Bubble Mixing System for City of Vista, CA. Pulsed Hydraulics Inc. will supply a standard product that will meet the functional intent of removing grease and reducing odors.

SCOPE:

The PHI variable speed mixing system is a patented method of mixing pump stations via injection of compressed air by pneumatic / electric valves through specifically spaced bubble forming plates anchored to the bottom of the pump stations. A factory programmed controller operates the injection process.

Compressed air is injected as a very short duration pulse or burst in order to form a large bubble air mass, which, as it rises to the surface, forms a powerful and thorough mixing action.

Each injection valve is connected to bubble forming plates with one-inch diameter piping made of suitable material for the liquid being mixed and for the air pressure utilized. Three mixing systems will be supplied for this project. One for each lift station: Buena Pump Stations 1 & 2, and Raceway Pump Station.

EQUIPMENT:

A. Bubble Forming Plates (referred to as BFPs) – The project will include seven (7), 8-inch diameter 316 stainless steel BFPs.

A BFP consists of two disks separated approximately 3/8 inch apart by internal spacers.

Air is injected through a 1-inch NPT threaded nipple in the top disk to the space between the disks where it is forced laterally to form the mixing air mass. Three 3/8-inch diameter, equally spaced pre-drilled holes are used for anchoring the BFP to the tank bottom. A 05/13/2025 C9 276 of 1078
2 15 Oro Beach Drive, Oroville, WA 98844 Tel: 800-641-1726 Email: [email protected] drawing of a BFP accompanies this proposal. BFPs can be leveled by using threaded bolts with leveling nuts.

B. PHI Mixing Valve Enclosures (referred to as MVEs) – PHI will supply three (3) model PHI 350SST-HT MVE’s.

1. The MVE is made of 304 SST and is NEMA 4X rated

2. The MVE will have injection valves which are solenoid controlled and pilot air assisted. The valve body and manifold bas e will be made of anodized aluminum.

Seals will be Nitrile/Buna-N. The valve will be a positive sealing poppet valve designed to be self-compensating for wear and non-lubed service. The valve will be supplied by Ross Controls.

3. The controller is a PLC by Maple Systems.

4. A 7-inch color touchscreen OIT shall be mounted on the MVE door. The OIT shall allow operators to change pulse frequency, pulse duration (open / close cycle timing), valve pulse order, valve operation mode (intermittent, continuous or off). A NEMA 4X door will protect the display from the elements when the MVE is mounted outdoors.

5. An air filter with a 50-micron element and an auto-drain feature is provided to remove particulates and water to protect the regulator and injection valve.

6. A manually adjustable pressure regulator with gauge provides constant pressure for proper air flow to the injection valves. It also allows for adjustment to different air pressures. Pressure to this regulator cannot exceed 175 PSIG nor be less than 30 PSIG. Excessive pressure will damage the regulator seal. Under pressure will not allow the valve to pulse correctly.

7. An electric heater (50 W) is provided when MVEs are located outdoors in cold climates.

8. Components are pre-piped with 304/316 stainless steel pipe and fittings and are factory tested for leaks and function. Quick disconnect unions are provided for servicing of components.

9. Each PHI MVE will require a 110 Va c @ 20-amp electrical service.

C. Spare Parts –

1. Three (3) Valve Solenoid Kits – Part No. 1467B7916

2. Six (6) Valve Seal Kits – Part No. CP16NA-SK

3. Four (4) Valve Silicon Grease Kits (Pact of 5) – Part No. G661

4. Three (3) Metalworks filter elements, 50 micron – Part No. 9210157

5. One (1) Air Pressure Sensor – Part No. F4200100PT
D. Compressed Air System –

1. A Kaeser SK-15 (15 HP) rotary screw compressor for mixing Buena Pump Station 1 & 2

2. A Kaeser SM-7.5 (7.5 HP) rotary scr ew compressor for mixing Raceway Pump Station

3. Both compressors are complete with dryer and receiver

4. Tank (see attached specification sheets).
2 05/13/2025 C9 277 of 1078
3 15 Oro Beach Drive, Oroville, WA 98844 Tel: 800-641-1726 Email: [email protected] EQUIPMENT SUMMARY:

Buena Pump Station #1:

1. One (1) PHi 350-2 (2-valves)

2. Two Bubble Forming Plates
Buena Pump Station #2:

1. One (1) PHi 350-3 (3-valves)

2. Three Bubble Forming Plates

3. One Kaeser SK-15 Compressor
Raceway Pump Station:

1. One (1) PHi 350-2 (2-valves)

2. Two Bubble Forming Plates

3. One Kaeser SM-7.5 Compressor
NOT INCLUDED:

1. Receiving, unloading and installation of equipment.

2. Electrical wire or conduit.

3. Piping from compressor(s) to PHI 355 Enclosure.

4. Piping from PHI 355 Enclosure to bubble forming plates.

5. Installation of all compressors and associated equipment.

6. Installation and anchoring of forming plates.

7. All parts required to install the syst ems that are not listed as PHI supply.

SERVICE:

1. Start-up, training and fine tuning: Two (2) days.

SUBMITTALS:

Two (2) weeks after order acceptance.

FABRICATION / DELIVERY:

1. Plates – One (1) week

2. Panels – Six (6) weeks after approval
FREIGHT:

Included in price.

PRICE: $107,700
TERMS:
20 % with return of approved drawings or order acceptance by PHI (if submittals are not required)
75% net 45 days from ship date
5 % after installation and acceptance of equipment
CONDITION OF SALE:

1. All prices quoted shall be valid for 60 days from the date of this proposal. 3 05/13/2025 C9 278 of 1078
4 15 Oro Beach Drive, Oroville, WA 98844 Tel: 800-641-1726 Email: [email protected]

2. The prices are based on the equipment being release for shipment by the 3rd quarter of 2021.

3. Prices on orders received after the above deadline or specifying later shipping dates shall be subject to review and possible adjustment in line with the then existing economic conditions

4. An interest charge of 1 ½% per month will be added to past due accounts.

5. Other conditions of sale shall apply as noted in the attached Terms & Conditions.

WARRANTY:

PHI Systems Inc. (PHI) warrants material and workmanship in equipment and assigns to the purchaser any express warranty granted by the suppliers of components used in the manufacture of the products. PHI's warranty shall be for a period of eighteen (18) months after the date of shipment to the original pu rchaser or one (1) years after start-up by the original purchaser, whichever date occurs firs t, during which time nonconforming products shall be repaired or replaced at PHI's option. THIS LIMITED WARRANTY IS IN LIEU OF ALL

OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING DESIGN, COURSE OF

DEALING, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND PHI

SHALL NOT BE LIABLE FOR LOSS OF USE, REVENUE, OR PROFIT, OR INJURY, OR FOR ANY OTHER CONSEQUENTIAL OR INCIDENTAL DAMAGES.

Submitted by:

Kris Drewry
405/13/2025 C9 279 of 1078
Title: City of Vista, CA
Buena Pump Station
Author: PHI/DMD
Date: 4/6/21 Sheet: 1 of 1
PHi Project #: 21-031

APPLICATION DRAWING

NOT TO SCALE
NOTES
RECOMMEND 15 HP ROTARY SCREW COMPRESSOR

COMPRESSOR PACKAGE TO INCLUDE DRYER, AND NECESSARY FILTERS ADJUST REGULATOR IN PHI ENCLOSURES TO PROVIDE 45-50 PSI TO BUBBLE

FORMING PLATES

BALL VALVES NEED TO BE PROVIDED TO ISOLATE PHI CONTROLLERS FROM

AIR SOURCE
3-PHASE 208/230/460 FOR COMPRESSOR
PHI SYSTEM REQUIRES 110/VAC/15 AMP CIRCUIT
1" STAINLESS STEEL PIPING RECOMMENDED
1" PIPING RATED @175 PSI AND SUITABLE FOR ENVIRONMENT

ALL AIR PIPING FROM THE PHI SYSTEM TO THE BUBBLE FORMING PLATES

MUST BE LEAK FREE FOR PROPER OPERATION
MOUNT BUBBLE FORMING PLATES WITHIN 1' OF INDICATED LOCATIONS BUT NO CLOSER THAN 2' FROM PUMP INTAKE WITHOUT AIR DEFLECTOR

MIXER CAN BE OPERATED CONTINUOUSLY OR INCREMENTALLY WITH

INSTALLED TIMER
5 05/13/2025 C9 280 of 1078
Title: City of Vista, CA
Raceway Pump Station
Author: PHI/DMD
Date: 4/7/21 Sheet: 1 of 1
PHi Project #: 21-031

APPLICATION DRAWING

NOT TO SCALE
To PHi Mixer
NOTES
RECOMMEND 7.5 HP ROTARY SCREW COMPRESSOR

COMPRESSOR PACKAGE TO INCLUDE DRYER, AND NECESSARY FILTERS ADJUST REGULATOR IN PHI ENCLOSURES TO PROVIDE 45-50 PSI TO BUBBLE

FORMING PLATES

BALL VALVES NEED TO BE PROVIDED TO ISOLATE PHI CONTROLLERS FROM

AIR SOURCE
3-PHASE 208/230/460 FOR COMPRESSOR
PHI SYSTEM REQUIRES 110/VAC/15 AMP CIRCUIT
1" STAINLESS STEEL PIPING RECOMMENDED
1" PIPING RATED @175 PSI AND SUITABLE FOR ENVIRONMENT

ALL AIR PIPING FROM THE PHI SYSTEM TO THE BUBBLE FORMING PLATES

MUST BE LEAK FREE FOR PROPER OPERATION
MOUNT BUBBLE FORMING PLATES WITHIN 1' OF INDICATED LOCATIONS BUT NO CLOSER THAN 2' FROM PUMP INTAKE WITHOUT AIR DEFLECTOR

MIXER CAN BE OPERATED CONTINUOUSLY OR INCREMENTALLY WITH

INSTALLED TIMER
6 05/13/2025 C9 281 of 1078
PHi-350 Series
Hydro-Pulse Mixer
Visit our Website at www.phiwater.com, email [email protected], call us at (800) 641-1726, or write us at 15 Oro Beach Dr., Oroville, WA 98844.

FOR INFORMATION:

Description: The PHI-350 mixer is unique in that it utilizes large air bub- bles which are sequentially injected in a liquid to create powerful mixing currents. The system is contained in an 30” x 24” x 8” NEMA-4X enclosure that consists of three major components.”
1) An electro-pneumatic valve which has a high CV valve, allowing it to open and close in milliseconds, which creates a well-formed bubble. 2) A pressure regulator/air filter, with auto-drain, which controls the pres- sure of the mixing air (typically set at 50 psi)
3) HMI (Human Machine Interface) with 7-inch programmable touchscreen sets pulse duration and frequency. Also provides timer for off/ on mixing schedule.

Bubble Forming Plate: The only equipment in-
stalled in the vessel is the forming plate and pip-
ing. The forming plate is an 8-inch disk consisting
of two 3/16” plates (either stainless steel or PVC,
depending on the product being mixed), which are
separated by 3/16 of an inch and connected to a 1-
inch NPT pipe. Piping is run from the enclosure
and connected to the forming plate. The electro-
pneumatic valve delivers the compressed air
through the piping to the forming plates where it
exits between the two plates, creating a large bub-
ble mass. The mixing is created by the bubble ris-
ing to the top of the vessel, forcing a wave action
to the sides of the vessel, then down the walls of
the vessel and back to towards the middle.

Smaller vessels can be mixed by a single valve
and forming plate, where a larger vessel may take
a number of valves controlling air to an array of
plates in the vessel.

Applications: The PHi-350 is used in wastewater treatment plants to mix sludge holding tanks, aerobic digesters, lift stations, chemical tanks, polishing basins, anoxic basins and aeration basins to enhance oxygen transfer, as well as any other liquid vessel that requires mixing.

The PHi-350 system is NSF-61 approved and used to mix potable water tanks of any size or shape. Complete mixing is accomplished in minutes.

Energy Savings: The PHi-350 uses substantially less energy than mechanical mixers. 7 05/13/2025 C9 282 of 1078
Visit our Website at www.phiwater.com, email [email protected], call us at (800) 641-1726, or write us at 15 Oro Beach Dr., Oroville, WA 98844.

FOR INFORMATION:

Air Pressure
Regulator
Compressed
Air Input
1" (25 mm)
female NPT
union
50 Micron
Air Filter
On/Off Switch
Circuit Breaker
Pneumatic
Valve
Pulsed Air
Output
1" (25 mm)
female NPT
HMI with 7” (178
mm)
Touchscreen
POWER: 110VAC @ 60HZ consumption <100 watts
with heater.

ENCLOSURE: FRP NEMA-4X 30" x 24" x 8" (762 mm
x 610 mm x 203 mm) Weight: 48 lbs (21 Kg)
OPERATING TEMPERATURE: 32 F to 110 F (0 to
43 C) with heater -20 F to 110 F (-29 to 43 C)
AIR CONSUMPTION: 4 cfm to 24 cfm @ 50 psig
(operator adjustable)
VALVE: Up to four 1-inch electro pneumatic pulsing
valves.

AIR REGULATOR: One inch air regulator with 50 mi-
cron air filter and auto drain.

CONTROL: Programmable Touchscreen HMI (Human
Machine Interface) sets pulse duration and frequency.

Options
Stainless Steel NEMA-4X enclosure
Heater: 60 Watts continuous fan thermostat controlled
for cold weather operation. Extra installation optional for extreme cold areas.

The system can be configured to support up to eight
one-inch electro-pneumatic valves.

Air Filter
Autodrain
PHi-350 Series
Hydro-Pulse Mixer
016 9/18
8 05/13/2025 C9 283 of 1078
9 05/13/2025 C9 284 of 1078
SM AirCenterTM Simplex - Standard Configuration
Compressor Model:

Discharge Pressure: 125 psig
Max. Operating Pressure: 150 psig
Capacity: 32 cfm
Drive Motor: 7.5 hp
Drive Motor Efficiency: 89.5 %
Standard Controller:

Electrical Requirement:

Cooling Method: Air-cooled
Air Receiver Size: 71 gal

SCOPE OF SUPPLY
AirCenter Simplex compressor package is designed for the performance specified herein. The Kaeser rotary screw compressor includes the following standard features and accessories:

Compressor
• Single-stage, fluid-injected rotary screw compressor with the power-saving Sigma Profile airend Electric Motor/Drive
• High efficiency, EPAct-compliant TEFC drive motor with thermal overload protection, minimum 1.15 service factor, 150% minimum pull-up torque and Class F insulation • Automatic tensioning device for belt drive
Starter
• Magnetic wye-delta reduced voltage starter housed in a NEMA 12 control panel Protective Devices
• Built-in protective devices include safety pressure relief valve(s), emergency stop button, fluid level sight glasses and door interlock switch
Air/Coolant System
• 4-micron air intake filter with cleanable and replaceable element • ASME fluid separator tank with 3-stage separation ensures minimal fluid carry-over of 1-3 ppm (by weight) • Filter mat on fluid and air coolers simplifies cooler maintenance Enclosure
• Soundproofed enclosure features lined panels and a durable powder-coated finish. Compressor is mounted on solid base frame with a solid steel floor and anti-vibration mounts. Additional vibration isolation of airend, motor and separator tank is standard
• Single removable panel provides access to all maintenance components, including two windows to view fluid level and belt tension
Sigma Control Basic
• Sigma Control Basic PLC-based control system with monitoring of emergency stop, motor overload, direction of rotation, airend discharge temperature, refrigerated dryer, analog inputs, cabinet temperature, service hours, back pressure, and minimum starting temperature • Sigma Control Basic ensures economic operation by means of the optimized dual control system. This allows the unit to run either fully loaded or unloaded and reduce power requirements during idle. Idle period timer shuts the compressor down if air is not required for a preset time Refrigerated Dryer
•
• Air-to-air and air-to-refrigerant heat exchangers are constructed of stainless steel plates that provide a low pressure drop. Dryer uses CFC-free R-134a refrigerant
• A multistage, stainless steel separator filters out large amounts of water and contaminants in the air stream Simplex Features and Options
• ASME receiver tank with safety relief valve, pressure gauge, and manual drain valve • Optional Clean Air Treatment Package
• Includes Eco-Drain and KOR coalescing oil removal filter Warranty
• Twenty-four (24) hour emergency parts guarantee (standard units only - see price list) • Standard twelve (12) month warranty on compressor package for materials and workmanship • Standard twenty-four (24) month limited warranty on airend, motor, and starters • Optional sixty (60) month limited warranty on Sigma Control Basic controller, airend and motor All specifications subject to change without notice.

SM 7.5
Built-in refrigerated air dryer provides pressure dew point as low as 38°F with minimum pressure drop SM 7.5
208-230/460V/3ph/60Hz
Sigma Control Basic
Scope of Supply Product_M-Travis/QEM/F-030283-USA-SM AirCenter Simp lex with Integral Dryer - Standard Configuration Quote-3/22 August 2008 10 05/13/2025 C9 285 of 1078
SM AirCenter Simplex
1 – Safety shutdown (emergency stop)/access door open 7 – Maximum cabinet temperature exceeded 2 – Motor overload 8 – Reserved for future use
3 – Incorrect direction of rotation S – Service hour limit exceeded 4 – Airend discharge temperature too high p – Back pressure exists 5 – Refrigerated dryer T – Below minimum starting temperature 6 – Analog input(s) defective i – Safety inspection activated

DIMENSIONAL DRAWINGS

MONITORING FUNCTIONS
All specifications subject to change without notice.

Technical Specifications / Drawings Product_M-Travis/QEM/F-030283-USA-SM AirCenter Simplex with Integral Dryer - Standard Configuration Quote-3/22 August 2008 11 05/13/2025 C9 286 of 1078
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/g41/g26/g46/g36/g40/g54/g40/g53/g3/g41/g44/g47/g55/g40/g53/g3/g46/g40/g36/g3/g18/g3/g40/g38/g50/g16/g39/g53/g36/g44/g49 /g46/g36/g40/g54/g40/g53/g3/g41/g44/g47/g55/g40/g53/g3/g46/g40/g3/g18/g3/g40/g38/g50/g16/g39/g53/g36/g44/g49/g41/g20 /g29/g3/g38/g72/g81/g87/g72/g85/g3/g82/g73/g3/g74/g85/g68/g89/g76/g87/g92 /g51/g82/g86/g76/g87/g76/g82/g81/g3/g80/g68/g85/g74/g76/g81/g68/g79/g79/g92/g3/g71/g72/g83/g72/g81/g71/g72/g81/g87/g3/g82/g81/g3/g71/g72/g86/g76/g74/g81 /g55/g85/g68/g81/g86/g83/g82/g85/g87/g3/g82/g83/g72/g81/g76/g81/g74/g3/g3640/g3/g80/g68/g70/g75/g76/g81/g72/g3/g90/g76/g71/g87/g75/g3/g14/g3/g22/g15/g28/g3/g76/g81/g70/g75 /g44/g39/g3/g29/g3/g44/g81/g87/g72/g85/g81/g68/g79/g3/g87/g75/g85/g72/g68/g71/g39/g76/g80/g72/g81/g86/g76/g82/g81/g86/g3/g86/g75/g82/g90/g81/g3/g76/g81/g3/g76/g81/g70/g75/g72/g86 /g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g80/g83/g85/g72/g86/g86/g72/g71/g3/g68/g76/g85 /g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g80/g83/g85/g72/g86/g86/g72/g71/g3/g68/g76/g85 /g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g80/g83/g85/g72/g86/g86/g72/g71/g3/g68/g76/g85 /g61
/g3/g61/g3/g61/g20/g3/g22/g18/g23
/g20/g3/g22/g18/g23
/g20/g3/g24/g18/g27
/g71/g76/g68/g17
/g20
/g22/g3/g91/g3/g71/g76/g68/g17
/g20/g3/g26/g18/g27
/g20/g25/g3/g20/g18/g23/g20/g25/g3/g26/g18/g27
/g26/g18/g27
/g25/g20/g22/g3/g22/g18/g23/g22/g19/g3/g20/g18/g23
/g20/g28/g3/g24/g18/g27
/g28/g19/g114
/g40/g79/g72/g70/g87/g85/g76/g70/g68/g79/g3/g70/g82/g81/g81/g72/g70/g87/g76/g82/g81 /g44/g39/g3/g49/g51/g55/g3/g20
/g58/g20
/g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g80/g83/g85/g72/g86/g86/g72/g71/g3/g68/g76/g85 /g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g82/g79/g76/g81/g74/g3/g68/g76/g85 /g44/g81/g79/g72/g87/g29/g3
/g70/g82/g82/g79/g76/g81/g74/g3/g68/g76/g85
/g44/g81/g79/g72/g87/g29/g3
/g70/g82/g82/g79/g76/g81/g74/g3/g68/g76/g85
/g44/g39/g3/g49/g51/g55/g3/g22/g18/g23
/g21/g19/g3/g26/g18/g27
/g43/g20 /g43/g20
/g44/g39/g3/g49/g51/g55/g3/g20/g18/g23
/g38/g82/g81/g81/g72/g70/g87/g76/g82/g81/g29
/g70/g82/g81/g71/g72/g81/g86/g68/g87/g72/g3/g71/g85/g68/g76/g81 /g44/g81/g79/g72/g87/g29/g3
/g70/g82/g82/g79/g76/g81/g74/g3/g68/g76/g85
/g20/g21
/g22/g21/g3/g20/g18/g27
/g25
/g20/g28/g3/g20/g18/g21
/g20/g23/g3/g22/g18/g23
/g21/g3/g20/g18/g23
/g24/g19/g3/g20/g18/g23
/g22/g21/g3/g26/g18/g27
/g20/g22/g3/g26/g18/g27
/g22/g28/g3/g26/g18/g27
/g22/g21/g3/g20/g18/g27
/g24/g20/g3/g20/g18/g23
/g20/g19/g3/g24/g18/g27
/g24/g20/g3/g20/g18/g23
/g20/g22/g3/g26/g18/g27
/g38/g82/g81/g81/g72/g70/g87/g76/g82/g81/g29
/g70/g82/g81/g71/g72/g81/g86/g68/g87/g72/g3/g71/g85/g68/g76/g81 /g44/g39/g3/g49/g51/g55/g3/g20/g44/g39/g3/g49/g51/g55/g3/g20 /g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g80/g83/g85/g72/g86/g86/g72/g71/g3/g68/g76/g85/g50/g88/g87/g79/g72/g87/g29/g3/g70/g82/g80/g83/g85/g72/g86/g86/g72/g71/g3/g68/g76/g85 /g41/g20 /g41/g26
/g24/g21/g3/g20/g18/g21
/g23/g3/g20/g18/g21/g20/g19/g3/g26/g18/g27/g21/g22/g3/g24/g18/g27/g20/g19/g3/g22/g18/g27 /g21/g3/g22/g18/g23
/g23/g3/g26/g18/g27
/g21/g28/g3/g24/g18/g27/g23/g3/g26/g18/g27
/g22/g3/g22/g18/g23
/g24/g18/g27 /g21/g27/g3/g20/g18/g23
/g21/g28/g3/g20/g18/g21
/g22/g3/g22/g18/g27/g21/g21/g3/g26/g18/g27
/g26/g23
/g24/g18/g27 /g21/g27/g3/g20/g18/g23
/g24/g3/g20/g18/g23
/g26/g24/g3/g20/g18/g21
/g24/g3/g20/g18/g21/g71/g76/g68/g17
/g20/g18/g21/g71/g76/g68/g17/g21/g3/g22/g18/g23 /g22/g28/g3/g20/g18/g23 /g71/g68/g76/g17/g3/g24/g18/g27
/g23/g23/g3/g20/g18/g27
/g21/g24/g3/g22/g18/g27
/g20/g25/g3/g20/g18/g27
13 05/13/2025 C9 288 of 1078
CUSTOMER: City of Vista
SITE NAME: CA, Vista - Raceway PS
DATE: April 20, 2021
RECOMMENDATIONS: Number of Units: 1
Number of Nozzles: 2
SCOPE:
1 NANO
2 HV 500 Nozzle - Flexible Install
200 ft Oxidant Tubing
200 ft Water Tubing
100 ft 2.5" Zipper Cable Sheath
2 IOM Manuals
1 Installation Kit - NANO - Multiple Nozzles
1 Modem
1 Communications - 1 Yr
1 Remote Monitoring - 1 Yr
OPTIONS:

Semi-Annual Maintenance & Extended Warranty Program - $10,995 annually BUDGET PRICING: 91,698$ USD, Freight Included. Taxes extra Pricing includes:
- 1 Technician, 1 trip for 2 days for installation inspection, startup and operator training - 2 semi-annual visits to perform maintenance starting 6 months after startup WARRANTY - 18 months from ship date or 12 months from start up whichever comes first

SHIPMENT
Submittals 2 to 4 weeks after receipt of written purchase order Shipment 4 to 6 weeks after receipt submittal approval or waiver NOTES
Contractor is responsible for piping (materials and labor) from the Vapex™ unit to the nozzle assembly Payment Terms: 15% upon release to production, 80% upon equipment delivery, 5% upon unit startup Prior to issuing Vapex Purchase Order, Vapex must provide a formal Quotation.

This is a preliminary budget. Above Pricing valid for 30 days

BUDGET & SIZING
2971-B Oxbow Circle
Cocoa, FL 32926
(407) 977-7250
05/13/2025 C9 289 of 1078
CUSTOMER: City of Vista
SITE NAME: CA, Vista - Sharowridge PS
DATE: April 20, 2021
RECOMMENDATIONS: Number of Units: 1
Number of Nozzles: 2
SCOPE:
1 NANO
2 HV 500 Nozzle - Flexible Install
200 ft Oxidant Tubing
200 ft Water Tubing
100 ft 2.5" Zipper Cable Sheath
2 IOM Manuals
1 Installation Kit - NANO - Multiple Nozzles
1 Modem
1 Communications - 1 Yr
1 Remote Monitoring - 1 Yr
OPTIONS:

Semi-Annual Maintenance & Extended Warranty Program - $10,995 annually BUDGET PRICING: 91,698$ USD, Freight Included. Taxes extra Pricing includes:
- 1 Technician, 1 trip for 2 days for installation inspection, startup and operator training - 2 semi-annual visits to perform maintenance starting 6 months after startup WARRANTY - 18 months from ship date or 12 months from start up whichever comes first

SHIPMENT
Submittals 2 to 4 weeks after receipt of written purchase order Shipment 4 to 6 weeks after receipt submittal approval or waiver NOTES
Contractor is responsible for piping (materials and labor) from the Vapex™ unit to the nozzle assembly Payment Terms: 15% upon release to production, 80% upon equipment delivery, 5% upon unit startup Prior to issuing Vapex Purchase Order, Vapex must provide a formal Quotation.

This is a preliminary budget. Above Pricing valid for 30 days

BUDGET & SIZING
2971-B Oxbow Circle
Cocoa, FL 32926
(407) 977-7250
05/13/2025 C9 290 of 1078
Rockwell Solutions
Attn: Kent Rockwell
Project: City of Vista
Quote Number:45437
Dated:04/02/21

DUE TO CONTINUED PRICING INSTABILITIES IN MOTORS, METALS AND CASTINGS ALL PRICING BEYOND 60 DAYS MUST BE VERIFIED PRIOR TO PLACING AN ORDER.

ITEM QTY UNIT DESCRIPTION UNIT PRICE TOTAL
Submittals:

Production Time:

FOB:

Terms:

Expiration:

Submittal time is 4 - 6 weeks after receipt of order.

Estimated 8-1 0 weeks after receipt of approved submittals, released to production and executed purchase order. Estimated ship dates are subject to change dependent on motor availability.

Vaughan Co. will arrange shipment upon the receipt of approved factory tests, if applicable.

Montesano, Washington via best way.

Contingent on credit approval.

Quotation valid for 60 days.

JC
“First and Only Chopper Pump – Worldwide”
Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ BUENA SHADOWRIDGE Pump Performance : 800 GPM
1 1 EA Vaughan Model S4TC-103
Portable Vaughan Conditioning Chopper Pump consisting of:

Casing, cast ductile iron with 4" ANSI CL 125 discharge flange.

Impeller, Cutter Bar, Cutter Nut Upper Cutter, cast steel, heat treated to minimum Rockwell C60.

Mechanical Seal, cartridge type with ductile iron gland, Viton O-rings, silicon carbide faces, and integral stainless steel sleeve as manufactured by Vaughan.

Elastomers, Buna N
Bearings, oil bath lubricated with minimum 100,000-hour L-10 bearing life.

Bearing Housing, cast ductile iron with piloted motor mount.

Automatic Oil Level Monitor, PVC plastic reservoir with 120V switch and relay and 25 ft. of hos e.

Shaft, heat treated steel
Drive, 10 HP, 1200 RPM, 230V OR 460V, 3 phase, 60 Hz, 1.15 SF, Explosion Proof (Class 1, Group C & D) 15 minute in air continuous duty submersible motor with tandem mechanical seals, moisture sensors, internal thermostats, and 50 feet of power and control cable, manufactured by ABB/Baldor.

High Velocity Mixing Nozzle, fabricated mild steel.
4” 22.5 Degree Nozzle Assembly , mounted to 4” ANSI 150# slip -on flange.

Pump Finish: Solvent wash and coat with Tnemec Perma-Shield PL Series 431 epoxy. (Except Motor).

Lifting Eye with Portable Stand, fabricated steel.

TOTAL LIST PRICE: $16,115 $16,115
BUENA SHADOWRIDGE Pump Performance : 1225 GPM
2 1 EA Vaughan Model S6UC-113
Portable Vaughan Conditioning Chopper Pump consisting of:

Casing, cast ductile iron with 6" ANSI CL 125 discharge flange.

Impeller, Cutter Bar, Cutter Nut Upper Cutter, cast steel, heat treated to minimum Rockwell C60.

Mechanical Seal, cartridge type with ductile iron gland, Viton O-rings, silicon carbide faces, and integral stainless steel sleeve as manufactured by Vaughan. 05/13/2025 C9 291 of 1078
Rockwell Solutions
Attn: Kent Rockwell
Project: City of Vista
Quote Number:45437
Dated:04/02/21

DUE TO CONTINUED PRICING INSTABILITIES IN MOTORS, METALS AND CASTINGS ALL PRICING BEYOND 60 DAYS MUST BE VERIFIED PRIOR TO PLACING AN ORDER.

ITEM QTY UNIT DESCRIPTION UNIT PRICE TOTAL
Submittals:

Production Time:

FOB:

Terms:

Expiration:

Submittal time is 4 - 6 weeks after receipt of order.

Estimated 8-1 0 weeks after receipt of approved submittals, released to production and executed purchase order. Estimated ship dates are subject to change dependent on motor availability.

Vaughan Co. will arrange shipment upon the receipt of approved factory tests, if applicable.

Montesano, Washington via best way.

Contingent on credit approval.

Quotation valid for 60 days.

JC
“First and Only Chopper Pump – Worldwide”
Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ Elastomers, Buna N
Bearings, oil bath lubricated with minimum 100,000-hour L-10 bearing life.

Bearing Housing, cast ductile iron with piloted motor mount.

Automatic Oil Level Monitor, PVC plastic reservoir with 120V switch and relay and 25 ft. of hos e.

Shaft, heat treated steel
Drive, 20 HP, 1200 RPM, 230V OR 460V, 3 phase, 60 Hz, 1.15 SF, Explosion Proof (Class 1, Group C & D) 15 minute in air continuous duty submersible motor with tandem mechanical seals, moisture sensors, internal thermostats, and 50 feet of power and control cable, manufactured by ABB/Baldor.

High Velocity Mixing Nozzle, fabricated mild steel.
6” 22.5 Degree Nozzle Assembly , mounted to 6 ” ANSI 150# slip -on flange.

Pump Finish: Solvent wash and coat with Tnemec Perma-Shield PL Series 431 epoxy. (Except Motor).

Lifting Eye with Portable Stand, fabricated steel.

TOTAL LIST PRICE: $22,410 $22,410
BUENA SHADOWRIDGE Pump Performance : 550 GPM
3 1 EA Vaughan Model S4SC-095
Portable Vaughan Conditioning Chopper Pump consisting of:

Casing, cast ductile iron with 4" ANSI CL 125 discharge flange.

Impeller, Cutter Bar, Cutter Nut Upper Cutter, cast steel, heat treated to minimum Rockwell C60.

Mechanical Seal, cartridge type with ductile iron gland, Viton O-rings, silicon carbide faces, and integral stainless steel sleeve as manufactured by Vaughan.

Elastomers, Buna N
Bearings, oil bath lubricated with minimum 100,000-hour L-10 bearing life.

Bearing Housing, cast ductile iron with piloted motor mount.

Automatic Oil Level Monitor, PVC plastic reservoir with 120V switch and relay and 25 ft. of hos e.

Shaft, heat treated steel
Drive, 7.5 HP, 1200 RPM, 230V OR 460V, 3 phase, 60 Hz, 1.15 SF, Explosion Proof (Class 1, Group C & D) 15 minute in air continuous duty submersible motor with 05/13/2025 C9 292 of 1078
Rockwell Solutions
Attn: Kent Rockwell
Project: City of Vista
Quote Number:45437
Dated:04/02/21

DUE TO CONTINUED PRICING INSTABILITIES IN MOTORS, METALS AND CASTINGS ALL PRICING BEYOND 60 DAYS MUST BE VERIFIED PRIOR TO PLACING AN ORDER.

ITEM QTY UNIT DESCRIPTION UNIT PRICE TOTAL
Submittals:

Production Time:

FOB:

Terms:

Expiration:

Submittal time is 4 - 6 weeks after receipt of order.

Estimated 8-1 0 weeks after receipt of approved submittals, released to production and executed purchase order. Estimated ship dates are subject to change dependent on motor availability.

Vaughan Co. will arrange shipment upon the receipt of approved factory tests, if applicable.

Montesano, Washington via best way.

Contingent on credit approval.

Quotation valid for 60 days.

JC
“First and Only Chopper Pump – Worldwide”
Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ tandem mechanical seals, moisture sensors, internal thermostats, and 50 feet of power and control cable, manufactured by ABB/Baldor.

High Velocity Mixing Nozzle, fabricated mild steel.
4” 22.5 Degree Nozzle Assembly , mounted to 4” ANSI 150# slip -on flange.

Pump Finish: Solvent wash and coat with Tnemec Perma-Shield PL Series 431 epoxy. (Except Motor).

Lifting Eye with Portable Stand, fabricated steel.

TOTAL LIST PRICE: $15,455 $15,455
4 3 EA Vaughan VPMR:

Pump Monitor Relayfor mounting in customer control panel to supply seal leakage and over temperature alarms for submersible motor.

TOTAL LIST PRICE: $500 $1,500
FREIGHT:

Freight not included. Freight quote available upon request $TBD Freight quotes are for informational purposes only and is not a guarantee of the final shipping charge.

Shipping charges are n ot finalized until the equipment leaves Vaughan’s warehouse.

Partial shipments are subject to additional freight charges Application: Lift Station Conditioning
Industry: Municipal
Jason Chase - Vaughan Co. Inc.
05/13/2025 C9 293 of 1078
PRODUCT WARRANTY, TERMS & CONDITIONS FOR SALES MADE BY VAUGHAN CO., INC.

Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/

1. GENERAL: The Terms & Conditions herein established by Vaughan Co., Inc . (“us”, “we”, “our”) as may be amended by us from time to time (“Terms and Conditions”) apply to all dealings with our potential and actual customers (“you” and “your”), whether made by you or us, for any solicitation , submission, inquiry, offer, request or arrangement (a “Communication”) or sale by us with respect to goods we sell (“Product(s)”). Wr itten authorization is only valid if executed by an authorized officer of Vaughan Co.

2. SCOPE OF SUPPLY: Scope of supply will be limited to accepted quotation or approved submittals, if required.

3. ACCEPTANCE OF ORDERS: No Communication is binding on us unless written authorization is obtained by an authorized officer of Vaughan Co. Any sample provided by us is not part of an Accepted Order.

4. SUBMITTALS: Drawings and submittals for approval will typically be supplied four to six (4-6) weeks from the receipt of the order in pdf format.

Vaughan will not be responsible for damages, fees or charges for any additional submittal reviews that were not the fault of Vaughan.

5. PRODUCTION TIME: Vaughan’s production time will begin after complete submittal approval, release to pr oduction, execution of the purchase order and receipt of progress payments, if applicable. Production time excludes time to approve test results.

6. NO CANC ELLATION: Accepted Orders cannot be cancelled or modified, in whole or in part, without our prior wr itten consent, which consent may be withheld or subject to conditions and reasonable charges we may impose. Any custom ordered parts cannot be cancelled without full payment.

7. DEFAULT: If Buyer defaults on the contract, Vaughan shall have the right to be cancel the contract in part or whole. Buyer shall be responsible for reasonable termination charges up to the total agreement value. The termination charge is at Vaughan’s discretion dependent upon the percentage of the Agreement price reflecting the percentage of the work fabricated prior to the default plus actual direct costs resulting from default, including cancellation charges directly associated with costs for items that are in production at time of cancellation.

8. PRICE INCREASE: Price of Product(s) is subject to increase if equipment is not released to production within six months from the date Vaughan r eceives the initial purchase order from you.

9. TAXES: All prices are subject to all applicable sales and use taxes and any other taxes now or hereafter imposed and/or levied by any governmental authority with respect to the sale of the Product(s) (“Applicable Taxes”).

Customers located in states where Vaughan is registered for sales tax sales must pay sales tax on all orders delivered or picked up within said state unless Vaughan Co. has in its possession an accurate and current resale or exemption certificate or other acceptable alternate document on file for your company and/or project. If you have a certificate on file with Vaughan Co., please indicate on the purchase order if tax is to be applied or not at the time of the order. Our failure to charge or collect Applicable Taxes when due shall not relieve you of your obligation for its payment. Regardless of any other payment terms, all Applicable Taxes are due net 30 days from the invoice date.

10. PAYMENT TERMS: Terms of sale will be shown on each i nvoice or purchase order, and it is agreed that invoices w ill be paid in full when due.

Standard payment terms for projects covered by a project payment bond that extends coverage to Vaughan Co. are as follows:
10% upon submittal approval;
10% prior to shipment of equipment;
75% net 30 from shipment of equipment;
5% due at the earlier of startup or 120 days from shipment of equipment.

However, Vaughan may at their discretion alter these percentages on a case by case basis. Projects that are not covered by a project payment bond, or payment bonds that do not extend coverage to Vaughan Co., must be 100% prepaid in advance of shipment. Payment is not subject to hold-backs or contingent upon the Buyer receiving payment from the Owner. If payment in full on any invoice is not received when due, or if your credit worthiness is deemed unsatisfactory by us at any time, we may take, without incurring any liability, one or more of the following actions: (a) impose a service charge at the rate that is the lesser of (i) 1.5% per month or (ii) the maximum rate allowed by applicable law, on any amount past due commencing from the date of such invoice, (b) modify or accelerate payments terms, (c) withhold delivery of Product(s) under any Accepted Order not yet shipped and/or delay, recall or reclaim shipments of Product(s) en route to you or delivered until arrangements satisfactory to us are made to secure payment for any outstanding invoice and for all open Accepted Orders and/or (d) file a lien or bond claim for any unpaid labor or material.

11. RETAINAGE: Retainage, if applicable, is limited to 5% of the total Accepted Order price less any applicable taxes and is due at the earlier of start-up or 10 days upon owner’s acceptance, however, retainage shall not exceed 120 days from the shipment of equipment.

12. FREIGHT: Unless otherwise stated in the purchase order or quote, freight for a single shipment is included. Additional freight cost for split-shipments will be the responsibility of the Buyer. Buyer is responsible for providing complete shipping information and requirements including, but not limited to residential delivery, lift gates, limited access, advance notice, construction/jobsite, etc.

Failure to provide accurate information may result in additional shipping fees.

Those fees are the responsibility of the Buyer and will be billed accordingly

13. DATE OF SHIPMENT: Shipment dates are approximate and subject to change based upon Product(s) availab ility, pr oduction schedules, and other prevailing conditions. Shipment date is contingent upon the receipt of approved submittals, execution of purchase order, r eceipt of progress payments and approved factory tests, if applicable. You must accept delivery after approval of submittals, production time and factory test approval or issue us a change to the Accepted Order that must be accepted by us in wr iting. . If Vaughan does not receive approval to ship equipment within 30 days from the submission of factory tests, Buyer will pay Vaughan $100 per day for storage of equipment.

14. LONG TERM STORAGE: We will hold Pr oduct(s) in long term storage contingent upon payment of full purchase order price less retainage. Long term storage duration, fees, and any other considerations will be evaluated on a case by case basis.

15. YOUR ACCEPTANCE OF PRODUCT(S): You are responsible to promptly inspect Product(s) delivered and notify us within five (5) calendar days following receipt of the Pr oduct(s) for which a claim is filed of any shortages, visible material defects or non-conformance of the Product(s) with the Accepted Order. If the equipment is damaged during transport that was arranged by Vaughan, Vaughan will file the claim with the freight carrier. Any damages will be limited to the amounts recovered by Vaughan from the freight carrier.

16. RETURNS: Product(s) may not be returned for any reason without authorization by us. Please refer to the “Returned Goods Authorization Policy” for further information on returns.

17. WARRANTY: Vaughan Company, Inc. (Vaughan Co.) warrants to the original purchaser/end user (Purchaser) all pumps and pump parts manufactured by Vaughan Co. to be free from defects in workmanship or material for a period of one (1) year from date of startup or eighteen (18) months from the date of shipment from Vaughan Co., whichever occurs sooner. Startup data must be submitted to Vaughan Co. within 30 days of startup. If Purchaser fails to submit startup data within 30 days of startup, then Va ughan, in its sole discretion, may elect to void this warranty at any time. Purchaser must contact Vaughan Co. prior to commencing any repair attempts, or. removing pump or parts from service. If Purchaser fails to contact Vaughan Co. prior to commencing any repair attempts or removing pumps or parts from service, then Vaughan, in its sole discretion, may elect to void this warranty at any time. If during said warranty period, any pump or pump parts manufactured by Vaughan Co. prove to be defective in workmanship or material under normal use and service, and if such pump or pump parts are returned to Vaughan Co.'s factory at Montesano, WA, or to a Vaughan authorized Service Fac ility, as directed by Vaughan Co., transportation charges prepaid, and if the pump or pump parts are found to be defective in workmanship or material, they w ill be replaced or repaired by Va ughan Co. free of charge. Products repaired or replaced from the Va ughan Co. factory or a Vaughan authorized Service Facility under this warranty will be returned freight prepaid. Vaughan Co. shall not be responsible for the cost of pump or part removal and/or re-installation.

All warranty claims must be submitted in writing to Vaughan Co. not later than thirty (30) days after warranty breach occurrence. The original warranty length shall not be extended with respect to pumps or parts repaired or replaced by Vaughan Co. under this Warranty. This Warranty is voided as to pumps or parts repaired/replaced by other than Vaughan Co. or its duly authorized representatives. Vaughan Co. shall not be liable for consequential damages of any kind, including, but not limited to, claims for property damage, personal injury, attorneys’ fees, lost profits, loss of us e, liability of Purchaser to customers, loss of goodwill, interest on money withheld by customers, damages related to third party claims, travel expenses, rented equipment, third party 05/13/2025 C9 294 of 1078
PRODUCT WARRANTY, TERMS & CONDITIONS FOR SALES MADE BY VAUGHAN CO., INC.

Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ contractor's fees, or unauthorized repair service or parts. The Purchaser, by acceptance of delivery, assumes all liability for the consequences of the use or misuse of Vaughan Co. products by the Purchaser, its employees or others.

Equipment and accessories purchased by Va ughan Co. from outside sources which are incorporated into any Vaughan pump or any pump part are warranted only to the extent of and by the original manufacturer's warranty or guarantee, if any, which warranty, if appropriate, will be assigned by Va ughan Co. to the Purchaser. It is Purchaser’s responsibi lity to consult the applicable pr oduct documentation for specific warranty information. Specific product documentation is available upon request. Any warranty shall be void if the total contract amount is not paid in full. Vaughan Co. neither assumes, nor authorizes any person or company to assume for it, any other obligation in connection with the sale of its equipment with the exception of a valid Vaughan "Performance Guarantee" or "Extended Warranty," if applicable. Any other enlargement or modification of this warranty by a representative or other selling agent shall not be legally binding on Vaughan Co. Warranty eligib ility determination is at Vaughan Co.’s sole discretion. Warranty Limitations: This warranty shall not apply to any pump or pump part which has been subjected to or been damaged by any of the following non-exclusive list of causes; Misuse, abuse, accident, negligence, operated in the dashed portion of the published pump curves, used in a manner contrary to Vaughan's printed instructions, defective power supply, improper electrical protection, faulty installation, maintenance, or repair, wear caused by pumping abrasive or corrosive fluids or by cavitation, dissatisfaction due to buyer’s remorse, damages incurred during transportation, dam ages incurred during installation or maintenance.THIS IS VAUGHAN CO.'S SO L E

WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES,

EXPRESSED OR IMPLIED, WHICH ARE HEREBY EXCLUDED

INCLUDING IN PARTICULAR ALL WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

18. FORCE MAJEURE: Vaughan shall have no liab ility in respect of failure to deliver or perform or delay in delivering or performing any obligations due to causes such as fire, earthquakes, flooding or other natural disasters, failure of our supplier to deliver on time, war, acts or threats of terrorism, strikes and any other circumstance outside the reasonable control of Vaughan.

19. DAMAGES: Vaughan is not responsible for any damages due to delays, special, indirect, consequential or punitive damages.

20. BACK CHARGES: You shall not charge Vaughan back charges without first receiving written approval from an authorized officer of Vaughan Co.

21. COLLECTION CHARGES: You shall pay all costs and expenses, including without limitation reasonable attorneys’ fees and administrative charges, we incur in endeavoring to protect our rights arising out of your failure to perform your obligations to us, including without limitation any attempt to collect any amount you owe us.

22. CONFIDENTIALITY: Buyer shall take reasonable efforts to maintain as confidential, such items marked or identified as such by Vaughan. Such confidential information shall not include information which may have been provided to Vaughan in connection with this Agreement. All devices, designs (including drawings, plans and specifications), estimates, prices, notes, electronic data, software and other documents or information prepared or disclosed by Vaughan, and all related intellectual property rights, shall remain Vaughan's property. Vaughan grants Buyer and Owner a non-exclusive, non- transferable license to use any such material solely for Buyer's use of the work.

Buyer shall not disclose any such material to third parties without Vaughan's prior written consent

23. EAR COMPLIANCE: If Product(s) are exported by us, we provide the following statement: “these commodities, tec hnology or software were exported from the United States in accordance with the export Administration Regulations. Diversion contrary to U.S. law is prohibited.”

24. GOVERNING LAW: The transactions between you and us are made in Washington State, shall be governed by the laws of Washington State, and you agree to submit exclusively to jurisdiction and venue of such state with respect to any dispute arising out of any transaction between you and us. YOU AND

WE KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE

THE RIGHT TO TRIAL BY JURY IN ANY ACTION OR
PROCEEDING ARISING OUT OF ANY SUCH DISPUTE.

25. DISPUTES: Any claim or dispute between Vaughan and Buyer, arising out of or relating to either's obligations to the other under this Contract, shall, if possible, be resolved by negotiation between Vaughan’s and Buyer’s designated representatives. Vaughan and Buyer each co mmit to seeking resolution of such matters in an amicable, professional and expeditious manner so as to avoid unnecessary losses, delays and disruptions to the Work. If a matter cannot be resolved by the parties' designated on-site representatives, the following dispute resolution procedure shall apply:
i. No later than thirty (30) days after the designated representatives fail to reach agreement, representatives from executive management of Seller and Contractor shall attempt to resolve the matter.
ii. If resolution cannot be reached by the parties' executive managers, no later than thirty (30) days after the executive managers fail to reach agreement, the parties shall submit the dispute to non-binding mediation. The parties shall select a mediator that is mutually acceptable. The location of the mediation shall be in County wherein the project is located.
iii. If resolution ca nnot be r eached by the parties thr ough mediation, within thirty (30) days after the mediation has concluded, either party may file a demand for arbitration. Such arbitration shall be administered by the American Arbitration Association (“AAA”) in accordance with its Construction Industry Arbitration Rules. Judgment on the award rendered by the arbitrator(s) may be entered in any court having jurisdiction thereof.

26. NO RIGHT OF SET-OFF: Each Accepted Order constitutes a separate and distinct contract when accepted by us and you may not withhold payment for an invoice or offset same, in whole or in part, against sums you claim are due you by us with respect to another Accepted Order, invoice or for any other cause or reason whatsoever.

27. INDEMNITY CLAUSE: Any indemnification shall not include claims of, or damages resulting from the negligence, gross negligence, or willful, wanton or intentional misconduct of the parties indemnified hereunder. To the extent that conditions, acts, activities or c onduct involve the contributory negligence or misconduct of you or other third parties, liab ility will be apportioned between the parties according to comparative fault.

28. OUR RIGHTS ARE NOT EXCLUSIVE: Our rights hereunder are in addition to and not in lieu of any other rights and remedies available to us at law or in equity.

29. NOTICES: All notices of claims or disputes given by either you or us with respect to any Communication, Accepted Order or these Terms & Cond ition s shall be in writing and sent by (a) first class mail with a copy by certified mail, return receipt requested, postage pre-paid, or (b) overnight delivery service, charges prepaid, and address as follows: (i) if intended for us, to our address to which a Communications was sent or an Accepted Order was placed, and (ii) if to you, at your address last known to us. Notice w ill be effective the first business day after notice is sent.

30. NO OTHER TERMS ACCEPTED: No terms or conditions, other than these Terms and Conditions, shall apply to any Accepted Order and no agreement or understanding in any way adding to or otherwise modifying these Terms and Conditions shall be binding on us unless set forth in writing and signed by an officer of Vaughan Co. Vaughan Co. is only bound to the terms of the contract/agreement/purchase order between Vaughan and Buyer. The Buyer’s Prime Contract with an Owner shall not affect the contract between Vaughan and Buyer unless specifically accepted in wr iting by an authorized officer of Vaughan Co.

31. COUNTERPARTS: This Agreement may be executed in counterpart, and may be executed by way of facsimile, email or electronic signature, and if so , shall be considered an original.

32. MISCELLANEOUS: No waiver of any rights or remedies shall be binding on us unless set forth in a written waiver signed by us. We do not give up any of our rights or remedies if we fail or delay in seeking a remedy or if we accept a payment while there is a breach by you. Any such waiver, delay or failure by us on one occasion shall not be deemed a waiver by us of any future default by you or of any future right or remedy available to us. The Section, Paragraph and other heading in these Terms & Conditions are for convenience of reference only and shall not limit or otherwise affect the meaning of any provision contained in these Terms and Conditions. The invalidity of enforceability of any provision in these Terms and conditions shall in no way effect the validity or enforceability of any other provision.
05/13/2025 C9 295 of 1078
VPAD719 VAUGHAN CHOPPER PUMPS 10/15/2020
VAUGHAN CO., INC. PRODUCT WARRANTY
Va ughan Company, Inc. (Va ughan Co.) wa rrants to the origina l purchaser/end user (Purchaser) a ll pumps a nd pump parts ma nufactured by Va ughan Co. to be free from defects in workmanship or material for a period of one (1) year from date of startup or eighteen (18) months from the date of shipment from Va ughan Co., whichever occurs sooner. Sta rtup data must be submitted to Va ughan Co. within 30 days of startup. If Purchaser fails to submit startup data within 30 days of startup, then Vaughan, in its sole discretion, may elect to void this wa rranty at a ny time. Purchaser must contact Vaughan Co. prior to commencing a ny repair a ttempts, or. removing pump or pa rts from service. If Purchaser fails to contact Va ughan Co. prior to commencing a ny repair a ttempts or removing pumps or pa rts from service, then Va ughan, in its sole discretion, may elect to void this wa rranty a t any time.

If during sa id wa rranty period, a ny pump or pump parts manufactured by Va ughan Co. prove to be defective in workmanship or material under normal use and service, and if such pump or pump parts are returned to Vaughan Co.'s factory at Montesano, WA, or to a Va ughan authorized Service Fa cility, a s directed by Va ughan Co., tra nsportation charges prepaid, a nd if the pump or pump parts are found to be defective in workmanship or material, they will be repla ced or repaired by Vaughan Co. free of charge. Products repaired or repla ced from the Vaughan Co. factory or a Va ughan authorized Service Fa cility under this wa rranty will be returned freight prepaid. Vaughan Co. shall not be responsible for the cost of pump or part removal and/or re-installation.

All warranty claims must be submitted in writing to Vaughan Co. not later than thirty (30) days after warranty breach occurrence. The original warranty length shall not be extended with respect to pumps or parts repaired or replaced by Vaughan Co. under this Wa rra nty. This Wa rranty is voided as to pumps or parts repaired/replaced by other than Vaughan Co. or its duly a uthorized representatives.

Vaughan Co. shall not be liable for consequential damages of any kind, including, but not limited to, claims for property damage, personal injury, a ttorneys’ fees, lost profits, loss of use, lia bility of Purchaser to customers, loss of goodwill, interest on money withheld by customers, damages related to third party claims, travel expenses, rented equipment, third party contractor's fees, or una uthorized repair service or pa rts. The Purchaser, by a cceptance of delivery, assumes all lia bility for the consequences of the use or misuse of Va ughan Co. products by the Purchaser, its employees or others.

Equipment a nd a ccessories purchased by Vaughan Co. from outside sources wh ich are incorporated into a ny Va ughan pump or a ny pump part a re warranted only to the extent of a nd by the original manufacturer's wa rranty or gua rantee, if a ny, which wa rranty, if a ppropriate, will be a ssigned by Va ughan Co. to the Purchaser. It is Purcha ser’s responsibility to consult the applicable product documentation for specific wa rranty information. Specific product documentation is a vailable upon request.

Any warranty shall be void if the total contract amount is not paid in full.

Vaughan Co. neither assumes, nor authorizes any person or company to assume for it, any other obligation in connection with the sale of its equipment with the exception of a valid Va ughan "Performance Guarantee" or "Extended Warranty," if a pplicable. Any oth er enla rgement or modification of this wa rranty by a representative or other selling a gent shall not be lega lly binding on Va ughan Co.

Wa rra nty eligibility determination is a t Va ughan Co.’s sole discretion.

Wa rra nty Limitations:

This warranty shall not apply to any pump or pump part which has been subjected to or been damaged by any of the following non- exclusive list of causes:
x Misuse
x Abuse
x Accident
x Negligence
x Operated in the dashed portion of the
published pump curves
x Used in a ma nner contrary to Vaughan's
printed instructions
x Defective power supply
x Improper electrical protection
x Fa ulty installation, maintenance, or repair
x Wear caused by pumping abrasive or
corrosive fluids or by cavitation
x Dissatisfaction due to buyer’s remorse
x Da mages incurred during transportation
x Da mages incurred during installation or
ma intenance
THIS IS VAUGHAN CO.'S SOLE WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES,

EXPRESSED OR IMPLIED, WHICH ARE HEREBY EXCLUDED INCLUDING IN PARTICULAR ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 05/13/2025 C9 296 of 1078
Rockwell Solutions
Attn: Kent Rockwell
Project: City of Vista
Quote Number: Q45435
Dated:04/02/21

DUE TO CONTINUED PRICING INSTABILITIES IN MOTORS, METALS AND CASTINGS ALL PRICING BEYOND 60 DAYS MUST BE VERIFIED PRIOR TO PLACING AN ORDER.

ITEM QTY UNIT DESCRIPTION UNIT PRICE TOTAL
Submittals:

Production Time:

FOB:

Terms:

Expiration:

Submittal time is 4 - 6 weeks after receipt of order.

Estimated 14 to 16weeks after receipt of approved submittals, release to production and executed purchase order. Estimated ship dates are subject to change dependent on motor availability.

Vaughan Co. will arrange shipment upon the receipt of approved factory tests, if applicable.

Montesano, Washington via best way.

Contingent on credit approval.

Quotation valid for 60 days.

JC
“Solids Handling Specialists”
Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ BUENA SHADOWRIDGE Pump Performance : 2037 GPM @ 155 FT. TDH 1 3 EA Vaughan Model PE8P-139
Vertical Dry Pit Pedestal Chopper Pump consisting of:

Casing and Backplate, cast ductile iron, with 8" ANSI CL 125 discharge flange Impeller, Upper Cutter and External Cutter,cast steel, heat treated to minimum Rockwell C60.

Cutter Bar,alloy steel, heat treated to minimum Rockwell C60.

Shaft, heat treated steel.

Bearings, oil bath lubricated with minimum 100,000 hour L-10 bearing life.

BearingHousing, cast ductileiron.

Flushless Mechanical Seal, cartridge type with stainless steel housing, integral stainless steel shaft sleeve, and silicon carbide faces.

Elastomers, Buna N
Pedestal Base with Inlet Flange, 8" 90° steel elbow with cleanout, drain and ANSI CL 150 inlet flange pedestal mounted on a fabricated steel base plate.

Coupling, elastomeric type by TB Woods.

Motor Mount, fabricated steel, piloted for self-aligning mounting of a C-face flange mounted motor.

Pump Finish: Solvent wash and coat with Tnemec Perma-Shield PL Series 431 epoxy. (Except Motor)
TOTAL LIST PRICE: $24,500 $73,500
2 3 EA Electric Motor:

DRIVE, 150 HP, 1800 RPM, 230/460/3/60, 1.15 SF, C-face, TEFC, flange mounted premium efficient electric motor.

TOTAL LIST PRICE: $11,290 $33,870
BUENA SHADOWRIDGE Pump Performance : 3600 GPM @ 100 FT. TDH 3 2 EA Vaughan Model PE8P-141
Vertical Dry Pit Pedestal Chopper Pump consisting of:

Casing and Backplate, cast ductile iron, with 8" ANSI CL 125 discharge flange Impeller, Upper Cutter and External Cutter,cast steel, heat treated to minimum Rockwell C60.

Cutter Bar, alloy steel, heat treated to minimum Rockwell C60.

Shaft, heat treated steel.
05/13/2025 C9 297 of 1078
Rockwell Solutions
Attn: Kent Rockwell
Project: City of Vista
Quote Number: Q45435
Dated:04/02/21

DUE TO CONTINUED PRICING INSTABILITIES IN MOTORS, METALS AND CASTINGS ALL PRICING BEYOND 60 DAYS MUST BE VERIFIED PRIOR TO PLACING AN ORDER.

ITEM QTY UNIT DESCRIPTION UNIT PRICE TOTAL
Submittals:

Production Time:

FOB:

Terms:

Expiration:

Submittal time is 4 - 6 weeks after receipt of order.

Estimated 14 to 16weeks after receipt of approved submittals, release to production and executed purchase order. Estimated ship dates are subject to change dependent on motor availability.

Vaughan Co. will arrange shipment upon the receipt of approved factory tests, if applicable.

Montesano, Washington via best way.

Contingent on credit approval.

Quotation valid for 60 days.

JC
“Solids Handling Specialists”
Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ Bearings, oil bath lubricated with minimum 100,000 hour L-10 bearing life.

BearingHousing, cast ductile iron.

Flushless Mechanical Seal, cartridge type with stainless steel housing, integral stainless steel shaft sleeve, and silicon carbide faces.

Elastomers, Buna N
Pedestal Base with Inlet Flange, 8" 90° steel elbow with cleanout, drain and ANSI CL 150 inlet flange pedestal mounted on a fabricated steel base plate.

Coupling, elastomeric type by TB Woods.

Motor Mount, fabricated steel, piloted for self-aligning mounting of a C-face flange mounted motor.

Pump Finish: Solvent wash and coat with Tnemec Perma-Shield PL Series 431 epoxy. (Except Motor)
TOTAL LIST PRICE: $24,500 $49,000
4 2 EA Electric Motor:

DRIVE, 200 HP, 1800 RPM, 230/460/3/60, 1.15 SF, C-face, TEFC, flange mounted premium efficient electric motor.

TOTAL LIST PRICE: $13,070 $26,140
RACEWAY Pump Performance: 650 GPM @ 158 FT. TDH
5 3 EA Vaughan Model S4V-132
Submersible Chopper Pump consisting of:

Casing and Backplatecast ductile iron with 4" ANSI CL 125 discharge flange.

Impeller, Cutter Bar, Cutter Nut Upper Cutter, cast steel, heat treated to minimum Rockwell C60.

Mechanical Seal, cartridge type with ductile iron gland, Viton O-rings, silicon carbide faces, and integral stainless steel sleeve as manufactured by Vaughan.

Elastomers, Buna N
Bearings, oil bath lubricated with minimum 100,000-hour L-10 bearing life.

Bearing Housing, cast ductile iron with piloted motor mount.

Automatic Oil Level Monitor, PVC plastic reservoir with 120V switch and relay and 25 ft. of hos e.

Shaft, heat treated steel
Drive, 60 HP, 1800 RPM, 230V OR 460V, 3 phase, 60 Hz, 1.15 SF, Explosion Proof (Class 1, Group C & D) 15 minute in air continuous duty submersible motor with 05/13/2025 C9 298 of 1078
Rockwell Solutions
Attn: Kent Rockwell
Project: City of Vista
Quote Number: Q45435
Dated:04/02/21

DUE TO CONTINUED PRICING INSTABILITIES IN MOTORS, METALS AND CASTINGS ALL PRICING BEYOND 60 DAYS MUST BE VERIFIED PRIOR TO PLACING AN ORDER.

ITEM QTY UNIT DESCRIPTION UNIT PRICE TOTAL
Submittals:

Production Time:

FOB:

Terms:

Expiration:

Submittal time is 4 - 6 weeks after receipt of order.

Estimated 14 to 16weeks after receipt of approved submittals, release to production and executed purchase order. Estimated ship dates are subject to change dependent on motor availability.

Vaughan Co. will arrange shipment upon the receipt of approved factory tests, if applicable.

Montesano, Washington via best way.

Contingent on credit approval.

Quotation valid for 60 days.

JC
“Solids Handling Specialists”
Vaughan Co., Inc. | 364 Monte-Elma Road | Montesano, WA. USA 98563 | Phone 360-249-4042 | Fax 360-249-6155 [email protected] | http:// www.chopperpumps.com/terms/ tandem mechanical seals, moisture sensors, internal thermostats, and 25 feet of power and control cable, manufactured by ABB/Baldor.

Pump Finish: Solvent wash and coat with Tnemec Perma-Shield PL Series 431 epoxy. (Except Motor).

TOTAL LIST PRICE: $31,070 $93,210
6 3 EA Standard Guide Rail System consisting of:
4" Base Elbow, cast ductile iron.
4" Guide Bracket, cast ductile iron.
(1) Intermediate Stiffener Brackets, 316 stainless steel located every 10 feet.

Top Mounting Bracket and Chain Holder Bracket, 316 stainless steel.

NOTE: Customer to provide 2" Sch. 40 pipe rails.

TOTAL LIST PRICE: $2,175 $6,525
7 3 EA Vaughan VPMR:

Pump Monitor Relayfor mounting in customer control panel to supply seal leakage and over temperature alarms for submersible motor.

TOTAL LIST PRICE: $500 $1500
Freight Options:

Freight not included. Freight quote available upon request $TBD Freight quotes are for informational purposes only and is not a guarantee of the final shipping charge.

Shipping charges are not finalized until the equipment leaves Va ughan’s warehouse.

Partial shipments are subject to additional freight charges Application: LIFT STATION
Industry: MUNICIPAL
Jason Chase - Vaughan Co., Inc.
05/13/2025 C9 299 of 1078
PRODUCT WARRANTY, TERMS & CONDITIONS FOR SALES MADE BY VAUGHAN CO., INC.

1. GENERAL: The Terms & Conditions herein established by Vaughan Co., Inc. (“us”, “we”, “our”) as may be amended by us from time to time (“Terms and Conditions”) apply to all dealings with our potential and actual customers (“you” and “your”), whether made by you orus, for any solicitation, submission, inquiry, offer, request or arrangement (a “Communication”) or sale by us with respect to goods we sell (“Product(s)”). Wr itten authorization is only valid if executed by an authorized officer of Vaughan Co.

2. SCOPE OF SUPPLY: Scope of supply w ill be limited to a ccepted quotation or approved submittals, if required.

3. ACCEPTANCE OF ORDERS: No Communication is binding on us unless written authorization is obtained by an authorized officer of Vaughan Co. Any sample provided by us is not part of an A ccepted Order.

4. SUBMITTALS: Drawings and submittals for approval will typically be supplied four to six (4-6) weeks from the receipt of the order in pdf format.

Vaughan will not be res ponsible for damages, fees or charges for any additional submittal reviews that were not the fault of Vaughan.

5. PRODUCTION TIME: Vaughan’s production time will begin after complete submittal approval, release to pr oduction, execution of the purchase order and receipt of progress payments, if applicable.

Production time excludes time to approve test results.

6. NO CANC ELLATION: Accepted Orders ca nnot be cancelled or modified, in whole or in part, without our prior wr itten consent, which consent may be withheld or subject to conditions and reasonable charges we may impose. Any custom ordered parts cannot be cancelled without full payment.

7. DEFAULT: If Buyer defaults on the contract, Vaughan shall have the right to be cancel the contract in part or whole. Buyer shall be responsible for reasonable termination charges up to the total agreement value. The termination charge is at Vaughan’s discretion dependent upon the percentage of the Agreement price reflecting the percentage of the work fabricated prior to the default plus actual direct costs resulting from default, including cancellation charges directly associated with costs for items that are in production at time of cancellation.

8. PRICE INCREASE: Price of Product(s) is subject to increase if equipment is not released to production within six months from the date Vaughan receives the initial purchase order from you.

9. TAXES: All prices are subject to all applicable sales and use taxes and any other taxes now or hereafter imposed and/or levied by any governmental authority with respect to the sale of the Product(s) (“Applicable Taxes”). Customers located in states where Vaughan is registered for sales tax sales must pay sales tax on all orders delivered or picked up within said state unless Vaughan Co. has in its possession a n accurate and current resale or exemption certificate or other acceptabl e alternate document on file for your company and/or project. If you have a certificate on file with Vaughan Co., please indicate on the purchase order if tax is to be applied or not at the time of the order. Our failure to charge or collect Applicable Taxes when due shall not relieve you of your obligation for its payment. Regardless of any other payment terms, all Applicable Taxes are due net 30 days from the invoice date.

10. PAYMENT TERMS: Terms of sale will be shown on each i nvoice or purchase order, and it is agreed that invoices will be paid in full when due .

Standard payment terms for projects covered by a project payment bond that extends coverage to Vaughan Co. are as follows:
10% upon submittal approval;
10% prior to shipment of equipment;
75% net 30 from shipment of equipment;
5% due at the earlier of startup or 120 days from shipment of equipment.

However, Vaughan may at their discretion alter these percentages on a case by case basis. Projects that are not covered by a project payment bond, or payment bonds that do not extend coverage to Vaughan Co., must be 100% prepaid in advance of shipment. Payment is not subject to hold- backs or contingent upon the Buyer r eceiving payment from the Owner.

If payment in full on any invoice is not r eceived when due, or if your credit worthiness is deemed unsatisfactory by us at any time, we may take, without incurring any liability, one or more of the following actions: (a) impose a service charge at the rate that is the lesser of (i) 1.5% per month or (ii) the maximum rate allowed by applicable law, on any amount past due commencing from the date of such invoice, (b) modify or accelerat e payments terms, (c) withhold delivery of Product(s) under any Accepted Order not yet shipped and/or delay, recall or reclaim shipments of Product(s) en route to you or delivered until arrangements satisfactory to us are made to secure payment for any outstanding invoice and for all open Accepted Orders and/or (d) file a lien or bond claim for any unpaid labor or material.

11. RETAINAGE: Retainage, if applicable, is limited to 5% of the tota l Accepted Order price less any applicable taxes and is due at the earlier of start-up or 10 days upon owner’s acceptance, however, retainage shall no t exceed 120 days from the shipment of equipment.

12. FREIGHT: Unless otherwise stated in the purchase order or quote , freight for a single shipment is included. Additional freight cost for split- shipments will be the res ponsibility of the Buyer. Buyer is res ponsible for providing complete shipping information and requirements including, but not limited to residential delivery, lift gates, limited access, advance notice, construction/jobsite, etc. Failure to provide accurate information may result in additional shipping fees. Those fees are the responsibility of the Buyer and will be billed accordingly

13. DATE OF SHIPMENT: Shipment dates are approximate and subject to change based upon Product(s) availab ility, pr oduction schedules, and other prevailing conditions. Shipment date is contingent upon the receipt of approved submittals, execution of purchase order, receipt of progress payments and approved factory tests, if applicable. You must accept delivery after approval of submittals, pr oduction time and factory test approval or issue us a change to the Accepted Order that must be accepted by us in writing. . If Vaughan does not receive approval to ship equipment within 30 days from the submission of factory tests, Buyer will pay Vaughan $100 per day for storage of equipment.

14. LONG TERM STORAGE: We will hold Pr oduct(s) in long term storage contingent upon payment of full purchase order price less retainage. Long term storage duration, fees, and any other considerations will be evaluated on a case by case basis.

15. YOUR ACCEPTANCE OF PRODUCT(S): You are responsible to promptly inspect Product(s) delivered and notify us within five (5) calendar days following receipt of the Product(s) for which a claim is filed of any shortages, visible material defects or non-conformance of the Product(s) with the Accepted Order. If the equipment is damaged during transport that was arranged by Vaughan, Vaughan will file the claim with the freight carrier. Any damages will be limited to the amounts recovered by Vaughan from the freight carrier.

16. RETURNS: Product(s) may not be returned for any reason without authorization by us. Please refer to the “Returned Goods Authorization Policy” for further information on returns.

17. WARRANTY: Vaughan Company, Inc. (Vaughan Co.) warrants to the original purchaser/end user (Purchaser) all pumps and pump parts manufactured by Vaughan Co. to be free from defects in workmanship or material for a period of one (1) year from date of startup or eighteen (18) months from the date of shipment from Vaughan Co., whichever occurs sooner. Startup data must be submitted to Vaughan Co. within 30 days of startup. If Purchaser fails to submit startup data within 30 days of startup , then Vaughan, in its sole discretion, may elect to void this warranty at any time. Purchaser must contact Va ughan Co. prior to commencing any repair attempts, or. removing pump or parts from service. If Purchaser fails to contact Vaughan Co. prior to commencing any repair attempts or removing pumps or parts from service, then Vaughan, in its sole discretion, may elect to void this warranty at any time. If during said warranty period, any pump or pump parts manufactured by Vaughan Co. prove to be defective in workmanship or material under normal use and service, and if such pump or pump parts are returned to Vaughan Co.'s factory at Montesano, WA, or to a Vaughan authorized Service Fac ility , as directed by Vaughan Co., transportation charges prepaid, and if the pump or pump parts are found to be defective in workmanship or material, they will be replaced or repaired by Vaughan Co. free of charge. Products repaired or replaced from the Va ughan Co. factory or a Vaughan authorized Service Facility under this warranty w ill be returned freight prepaid. Vaughan Co. shall not be responsible for the cost of pump or part removal and/or re-installation. All warranty claims must be submitted in writing to Va ughan Co. not later than thirty (30) days after warranty breach occurrence. The original warranty length shall not be extended with respect to pumps or parts repaired or replaced by Vaughan Co. under this Warranty. This Warranty is voided as to pumps or parts repaired/replaced by other than Vaughan Co. or its duly authorized representatives. Vaughan Co. shall not be liable for consequential damages of any kind, including, but not limited to, claims for property damage, personal injury, attorneys’ fees, lost profits, loss of use, liability 05/13/2025 C9 300 of 1078
PRODUCT WARRANTY, TERMS & CONDITIONS FOR SALES MADE BY VAUGHAN CO., INC. of Purchaser to customers, loss of goodw ill, interest on money withheld by customers, damages related to third party claims, travel expenses, rented equipment, third party contractor's fees, or unauthorized repair service or parts. The Purchaser, by acceptance of delivery, assumes all liability for the consequences of the use or misuse of Va ughan Co. products by the Purchaser, its employees or others. Equipment and accessories purchased by Va ughan Co. from outside sources which are incorporated into any Vaughan pump or any pump part are warranted only to the extent of and by the original manufacturer's warranty or guarantee, if any, which warranty, if appropriate, will be assigned by Va ughan Co. to the Purchaser. It is Purchaser’s responsibility to consult the applicable product documentation for specific warranty information. Specific product documentation is available upon request. Any warranty shall be void if the total contract amount is not paid in full. Vaughan Co. neither assumes, nor authorizes any person or company to assume for it, any other obligation in connection with the sale of its equipment with the exception of a valid Vaughan "Performance Guarantee" or "Extended Warranty," if applicable. Any other enlargement or modification of this warranty by a representative or other selling agent shall not be legally binding on Vaughan Co. Warranty eligibility determination is at Vaughan Co.’s sole discretion. Warranty Limitations: This warranty shall not apply to any pump or pump part which has been subjected to or been damaged by any of the following non-exclusive list of causes; Misuse, abuse, accident, negligence, operated in the dashed portion of the published pump curves, used in a manner contrary to Vaughan's printed instructions, defective power supply, improper electrical protection, faulty installatio n , maintenance, or repair, wear caused by pumping abrasive or corrosive fluids or by cavitation, dissatisfaction due to buyer’s remorse, damages incurred during transportation, damages incurred during installation or maintenance. THIS IS VAUGHAN CO.'S SOLE WARRANTY AND I S

IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED O R

IMPLIED, WHICH ARE HEREBY EXCLUDED INCLUDING IN

PARTICULAR ALL WARRANTIES OF MERCHANTABILITY O R
FITNESS FOR A PARTICULAR PURPOSE.

18. FORCE MAJEURE: Vaughan shall have no liability in respect of failure to deliver or perform or delay in delivering or performing any obligations due to causes such as fire, earthquakes, flooding or other natural disasters, failure of our supplier to deliver on time, war, acts or threats of terrorism, strikes and any other circumstance outside the reasonable control of Vaughan.

19. DAMAGES: Vaughan is not responsible for any damages due to delays, special, indirect, consequential or punitive damages.

20. BACK CHARGES: You shall not charge Vaughan back charges without first receiving written approval from an authorized officer of Vaughan Co.

21. COLLECTION CHARGES: You shall pay all costs and expenses, including without limitation reasonable attorneys’ fees and administrative charges, we incur in endeavoring to protect our rights arising out of your failure to perform your obligations to us, including without limitation a n y attempt to collect any amount you owe us.

22. CONFIDENTIALITY: Buyer shall take reasonable efforts to maintain as confidential, such items marked or identified as such by Vaughan.

Such confidential information shall not include information which may have been provided to Vaughan in connection with this Agreement. All devices, designs (including drawings, plans and specifications), estimates, prices, notes, electronic data, software and other documents or information prepared or disclosed by Vaughan, and all related intellectual property rights, shall remain Vaughan's property. Vaughan grants Buyer and Owner a non-exclusive, non-transferable license to use any such material solely for Buyer's use of the work. Buyer shall not disclose any such material to third parties without Vaughan's prior written consent

23. EAR COMPLIANCE: If Product(s) are exported by us, we provide the following statement: “these commodities, tec hnology or software were exported from the United States in accordance with the e xport Administration Regulations. Diversion contrary to U.S. law is prohibited.”

24. GOVERNING LAW: The transactions between you and us are made in Washington State, shall be governed by the laws of Washington State, and you agree to sub mit exclusively to jurisdiction and venue of such state with respect to any dispute arising out of any transaction between you and us. YOU AND WE KNOWINGLY, VOLUNTARILY AND

INTENTIONALLY WAIVE THE RIGHT TO TRIAL BY JURY IN

ANY ACTION OR PROCEEDING ARISING OUT OF ANY SUCH
DISPUTE.

25. DISPUTES: Any claim or dispute between Vaughan and Buyer, arising out of or relating to either's obligations to the other under this Contract, shall, if possible, be resolved by negotiation between Vaughan’s and Buyer’s designated representatives. Vaughan and Buyer each commit to seeking resolution of such matters in an amicable, professional and expeditious manner so as to avoid unnecessary losses, delays and disruptions to the Work. If a matter cannot be resolved by the parties' designated on-site representatives, the following dispute resolution procedure shall apply:
i. No later than thirty (30) days after the designated representatives fail to reach agreement, representatives from executive management of Seller and Contractor shall attempt to resolve the matter.
ii. If resolution cannot be r eached by the parties' executiv e managers, no later than thirty (30) days after the executive managers fail to reach agreement, the parties shall sub mit the dispute to non-binding mediation. The parties shall select a mediator that is mutually acceptable. The location of the mediation shall be in County wherein the project is located. iii. If resolution ca nnot be reached by the parties through mediation, within thirty (30) days after the mediation has concluded, either party may file a demand for arbitration. Such arbitration shall be administered by the American Arbitration Association (“AAA”) in accordance with its Construction I ndustry Arbitration Rules.

Judgment on the award rendered by the arbitrator(s) may be entered in any court having jurisdiction thereof.

26. NO RIGHT OF SET-OFF: Each Accepted Order constitutes a separate and distinct contract when accepted by us and you may not withhold payment for an invoice or offset same, in whole or in part, against sums you claim are due you by us with respect to another Accepted Order, invoice or for any other cause or reason whatsoever.

27. INDEMNITY CLAUSE: Any indemnification shall not include claims of, or damages resulting from the negligence, gross negligence, or willful, wanton or intentional misconduct of the parties indemnified hereunder.

To the extent that conditions, acts, activities or c onduct involve the contributory negligence or misconduct of you or other third parties, liability will be apportioned between the parties according to comparative fault.

28. OUR RIGHTS ARE NOT EXCLUSIVE: Our rights hereunder are in addition to and not in lieu of any other rights and remedies available to u s at law or in equity.

29. NOTICES: All notices of claims or disputes given by either you or us with respect to any Communication, Accepted Order or these Terms & Conditions shall be in writing and sent by (a) first class mail with a copy by certified mail, return receipt requested, postage pre-paid, or (b) overnight delivery service, charges prepaid, and address as follows: (i) if intended for us, to our address to which a Communications was sent or an Accepted Order was placed, and (ii) if to you, at your address last known to us. Notice will be effective the first business day after notice is sent.

30. NO OTHER TERMS ACCEPTED: No terms or conditions, other than these Terms and Conditions, shall apply to any Accepted Order and no agreement or understanding in any way adding to or otherwise modifying these Terms and Conditions shall be binding on us unless set forth in writing and signed by an officer of Vaughan Co. Vaughan Co. is only bound to the terms of the contract/agreement/purchase order between Vaughan and Buyer. The Buyer’s Prime Contract with an Owner shall not affect the contract between Vaughan and Buyer unless specifically accepted in writing by an authorized officer of Vaughan Co.

31. COUNTERPARTS: This Agreement may be executed in counterpart, and may be executed by way of facsimile, email or electronic signature, and if so, shall be considered an original.

32. MISCELLANEOUS: No waiver of any rights or remedies shall be binding on us unless set forth in a written waiver signed by us. We do no t give up any of our rights or remedies if we fail or delay in seeking a remedy or if we accept a payment while there is a breach by you. Any such waiver, delay or failure by us on one occasion shall not be deemed a waiver by us of any future default by you or of any future right or remedy available to us. The Section, Paragraph and other heading in these Terms & Conditions are for convenience of reference only and shall not limit o r otherwise affect the meaning of any provision contained in these Terms and Conditions. The invalidity of enforceability of any provision in these Terms and conditions shall in no way effect the validity or enforceability of any other provision.
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VPAD719 VAUGHAN CHOPPER PUMPS 10/15/2020
VAUGHAN CO., INC. PRODUCT WARRANTY
Va ughan Company, Inc. (Va ughan Co.) wa rrants to the origina l purchaser/end user (Purchaser) a ll pumps a nd pump parts ma nufactured by Va ughan Co. to be free from defects in workmanship or material for a period of one (1) year from date of startup or eighteen (18) months from the date of shipment from Va ughan Co., whichever occurs sooner. Sta rtup data must be submitted to Va ughan Co. within 30 days of startup. If Purchaser fails to submit startup data within 30 days of startup, then Vaughan, in its sole discretion, may elect to void this wa rranty at a ny time. Purchaser must contact Vaughan Co. prior to commencing a ny repa ir a ttempts, or. removing pump or pa rts from service. If Purchaser fails to contact Va ughan Co. prior to commencing a ny repair a ttempts o r removing pumps or pa rts from service, then Va ughan, in its sole discretion, may elect to void this wa rranty a t any t ime.

If during sa id wa rranty period, a ny pump or pump parts manufactured by Va ughan Co. prove to be defective in workmanship or material under normal use and service, and if such pump or pump parts are returned to Vaughan Co.'s factory at Montesano, WA, or to a Va ughan authorized Service Fa cility, a s directed by Va ughan Co., tra nsportation charges prepaid, a nd if the pump or pump pa rts are found to be defective in workmanship or material, they will be repla ced or repaired by Vaughan Co. free of charge. Pro ducts repaired or repla ced from the Vaughan Co. factory or a Va ughan authorized Service Fa cility under this wa rranty will be returned freigh t prepaid. Vaughan Co. shall not be responsible for the cost of pump or part removal and/or re-installation.

All warranty claims must be submitted in writing to Vaughan Co. not later than thirty (30) days after warranty breach occurrence.T h e original warranty length shall not be extended with respect to pumps or parts repaired or replaced by Vaughan Co. under this Wa rra nty. This Wa rranty is voided as to pumps or parts repaired/replaced by other than Vaughan Co. or its duly a uthorized representatives.

Vaughan Co. shall not be liable for consequential damages of any kind, including, but not limited to, claims for property damage, personal injury, a ttorneys’ fees, lost profits, loss of use, lia bility of Purchaser to customers, loss of goodwill, interest on money withheld by customers, damages related to third party claims, travel expenses, rented equipment, third party contractor's fees, or una uthorized repair service or pa rts. The Purchaser, by a cceptance of delivery, assumes all lia bility for the consequences o f the use or misuse of Va ughan Co. products by the Purchaser, its employees or others.

Equipment a nd a ccessories purchased by Vaughan Co. from outside sources which are incorporated into a ny Va ughan pump or a ny pump part a re warranted only to the extent of a nd by the original manufacturer's wa rranty or gua rantee, if a ny, which wa rranty, if a ppropriate, will be a ssigned by Va ughan Co. to the Purchaser. It is Purcha ser’s responsibility to consult the applicable product documentation for specific wa rranty information. Specific product documentation is a vailable upon request.

Any warranty shall be void if the total contract amount is not paid in full.

Vaughan Co. neither assumes, nor authorizes any person or company to assume for it, any other obligation in connection with the sale of its equipment with the exception of a valid Va ughan "Performance Guarantee " or "Extended Warranty," if a pplicable. Any other enla rgement or modification of this wa rranty by a representative or other selling a gent shall not be lega lly binding on Va ughan Co.

Wa rra nty eligibility determination is a t Va ughan Co.’s sole discretion.

Wa rra nty Limitations:

This warranty shall not apply to any pump or pump part which has been subjected to or been damaged by any of the following non- exclusive list of causes:
x Misuse
x Abuse
x Accident
x Negligence
x Operated in the dashed portion of the
published pump curves
x Used in a ma nner contrary to Vaughan's
printed instructions
x Defective power supply
x Improper electrical protection
x Fa ulty installation, maintenance, or repair
x Wear caused by pumping abrasive or
corrosive fluids or by cavitation
x Dissatisfaction due to buyer’s remorse
x Da mages incurred during transportation
x Da mages incurred during installation or
ma intenance
THIS IS VAUGHAN CO.'S SOLE WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES,

EXPRESSED OR IMPLIED, WHICH ARE HEREBY EXCLUDED INCLUDING IN PARTICULAR ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 05/13/2025 C9 302 of 1078
Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services Appendix C. Cost Benefit Analysis Evaluation
Criteria Technical Memorandum
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Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services

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Memo
Date: Friday, March 26, 2021
Project: Raceway & Buena Creek Pump Station Improvement Study and Owner’s Advisor Services To: Michael Hilker, City of Vista PM
From: Mandira Sudame, HDR
Subject: Cost Benefit Analysis Evaluation Criteria
1 Introduction
The Raceway Pump Station (RBPS) is owned by the City of Vista (City), and the Buena Creek Pump Station (BCPS) is owned by the Buena Sanitation District and managed by the City. Both pump stations are operated and maintained by Encina Wastewater Authority (EWA). These two pump stations convey wastewater for treatment at the Encina Water Pollution Control Facility (EWPCF) in Carlsbad. The RBPS and BCPS are experiencing high levels of Fats, Oils, and Grease (FOG), sc um build up in the wet wells, and rags including other solids clogging pumps (ragging) which is creating operation and maintenance issues. Staff regularly uses low pressure water hoses to break-down the FOG mat and force it back into solution so it can be readily pass through the pumps and ultimately removed and beneficially utilized at EWPCF.

The City retained HDR to provide a comprehensive assessment of available FOG abatement technologies that could be utilized to alleviate FOG accumulation in the wet wells of these two pump stations. The goal is to reduce costs associated with manually dispersing the FOG mats in the wet wells, reduce use of potable water, reduce labor hours, increase employee safety, and reduce or eliminate the frequency of pump clogging..
2 FOG Mitigation Technologies
Several technologies are available and have been successfully used at other wastewater collection and treatment facilities to alleviate the FOG problem. HDR is considering the following technologies for both RBPS and BCPS. Vendors for each technology are shown in parantheses. x Mixing Technologies
o Mechanical Mixing (WILO EMU, Flygt, Anue Jet System)
o Bubble Mixing (Enviromex, Pulsed Hydraulics Inc.)
x Advanced Oxidation Methods (Vapex)
x Biological Additives (MicroBlock)
x Chopper Pumps (Vaughn)
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Enter Client Here | Raceway & Buena Creek Pump Station Improvement Study and Owner’s Advisor Services Cost Benefit Analysis Evaluatio n Criteria

The FOG mitigation technologies differ significantly in their installation, operation requirements and cost. They also differ in their energy use, impact on downstream treatment, required modification to the wet well, maintenance frequency, flexib ility of operation and level of interference with the odor control system.

HDR is conducting an initial screening of technologies by talking to vendors, comp iling information and interviewing listed references. The criteria listed below will be used as the basis for gathering information from vendors.

Based on the collected information, HDR will conduct a Cost B enefit Analysis (CBA) for the shortlisted technologies.

This memorandum summarizes the evaluation criteria, scoring and weighting requirements for the CBA.
3 Evaluation Criteria
To evaluate these technologies on an equal basis, HDR developed a set of criteria relevant to the FOG abatement technologies under consideration. Each criterion is scored on a scale of 0 to 5 with 5 being the best score. The evaluation scores will be tabulated in spreads heet. A weighting factor will then be applied to each score. The weighting factors range from 1 to 10 and are applied to criterion based on the impact and importance of the criterion on the evaluation. The criterion weight is multiplied by the corresponding criterion score to arrive at the final score for each criterion. The scores are then added together to arrive at the total score for each technology. The technologies w ill be ranked based on highest to lowest score.

HDR developed eleven criteria to evaluate the FOG technologies. The criteria are listed and discussed with their scoring values in the following sections. The specific details of the scoring associated with some criterion will be determined after receiving the technology information. Capital cost criterion is an example of this where costs for the technologies will be received and t hen the technologies will be scored 0 to 5 based on how the costs for the technologies compare to each other.

3.1 Performance Track Record
The performance track record refers to the actual number and frequency of unscheduled outages and nature of equipment failures at various installations and overall satisfaction of the users.

Unscheduled outages, more than one (1) per year, would lead to a lower score.

We are requesting each technology vendor to provide a minimum of five similar installations for FOG abatement. A minimum of five reference installations in Southern California will get scored at 5. If the technology has less than 5 installation in the United States it will receive score of zero. For each technology considered, telephone interviews will be conducted with plant operator/staff at installation sites. Criteria scoring will be determined based on the input received.
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Table 3-1 Performance Track Record Scoring
Performance Track Record Score
Exceeds Criteria 5
Meets Criteria 4
Minimally meets Criteria 2
Not Acceptable 0

3.2 Constructability
This criterion refers to the amount of construction changes that need to be done within the wet well to implement the technology. More intrusive changes to the wet well equates to higher construction costs and more process interruptions. Also, any flow bypass requirements will be considered.

Table 3-2 Constructability Scoring
Constructability Score
No modifications 5
Minor modifications 3
Major modifications 1
Structural modifications 0

3.3 Ease of Operation
Ease of operation criteria considers the amount of time the operators will need to learn the proposed system and the simplicity of its use. This criterion also includes the duration and frequency of operation for each technology.

Table 3-3 Ease of Operation Scoring
Ease of Operation Score
Very easy 5
Moderate 3
Cumbersome 1
Difficult 0
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3.4 Maintenance Frequency
The frequency of maintenance criteria reflects the amount of time the operators will need to attend to the FOG mitigation system installation such as adding chemicals, replacing filters or doing routine maintenance. As shown in Table 3-4, the more frequent the maintenance, the lower the score.

Table 3-4 Maintenance Frequency Scoring
Maintenance Frequency Score
Quarterly 5
Monthly 3
Weekly 1
Daily 0

3.5 Potable Water Use
This is a sustainability criterion that rewards the technology that limits the use of potable water.

Table 3-5 Potable Water Use Scoring
Potable Water Use Score
No 5
Limited 3
Medium 1
High 0

3.6 Impact on Odor Control System
Both the RBPS and BCPS utilizes an odor control system connected to each pump station’s wet well. Any increase in volume or concentration of the odors will negatively impact the odor control system and consequently the permit. The technologies will be evaluated and scored base on their impact on the odor control system. The criterion includes consideration for impacts on permit, insurance and additional staff training. Table 3-6 shows that no impact to the existing odor control system will score high and the score decreases as the impacts grow. 05/13/2025 C9 308 of 1078
Enter Client Here |R aceway & Buena Creek Pump Station Improvement Study and Owner’s Advisor Services Cost Benefit Analysis Evaluation Criteria

Table 3-6 Impact on Odor Control System Scoring
Impact on
Odor Control Score
None 5
Low 3
Moderate 1
High 0

3.7 Impact on Downstream Treatment
The downstream treatment processes may be sensitive to additions/changes in the chemistry of the wastewater at either or both of the pump stations. Due to the distance of the pump stations from the EWPCF, we think the impact will be negligible. However, we are including this criterion to evaluate whether technology requires chemical additions or will change the chemistry of the wastewater that may cause a detrimental impact on treatment.

Table 3-7 Impact on Downstream Treatment Scoring
Impact on Downstream
Treatment Score
No 5
Low 3
Medium 1
High 0

3.8 Impact on Existing Equipment
The RBPS wet well consists of submersible pumps, pipes, pump guides and sluice gates. Both RBPS and BCPS wet wells contain electrical, signal cables, level sensors and grinders. The BCPS wet well also contains access doors, and walkways. The FOG technology selected may impact the performance or condition of these existing equipment. This criterion helps evaluate the potential impact of the technology on the existing wet well equipment.

Table 3-8 Impact on Existing Equipment Scoring
Impact on Existing
Equipment Score
None 5
Low 3
Moderate 1
High 0
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3.9 Capital Cost
An important factor in evaluating any treatment technology is the initial purchase (capital) cost.

The capital cost includes the following items:
x Equipment cost
x Cost to upgrade electrical and instrumentation at the pump stations x Installation cost
x Engineering and construction management (20% of Installation cost) x Contingency (30%)
This evaluation criteria score is inversely proportional to the capital cost associated with the technology. We will define the dollar values for each capital cost ranking of low, moderate and high after we have received the equipment costs. The capital cost of each technology will be ranked against each other and scored using the ranking shown in Table 3-9.

Table 3-9 Capital Cost Scoring
Capital Cost Score
Low 5
Moderate 3
High 1
Very High 0

3.10 Operational& Maintenance Cost
The ongoing operational and maintenance (O&M) evaluation criteria scoring is inversely proportional to the O&M cost. The O&M cost includes:
x Energy cost
x Chemical cost
x Spare parts, availability and lead time
x Labor
x Vendor support, availability and response
One year of O&M costs will be estimated for each technology and ranked against each other and scored using the scores shown in Error! Reference source not found.Table 3-10.

Table 3-10 Operation & Maintenance Cost Scoring
Operation & Maintenance
Cost Score
Low 5
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Moderate 3
High 1
Very High 0

3.11 Supplementary Benefits
This criteria aids in scoring the FOG mitigation technology that provides supplementary or secondary benefits upon its use such as reduction in odor, enhance biological activity, or reduced solids settling. This criterion provides additional credit for such supplementary benefits.

Table 3-11 Supplementary Benefits Scoring
Supplementary Benefits Score
Significant 5
Partial 3
Minimal 1
None 0

3.12 Weighting Factors
The weighting factors are used to distinguish between more and less important evaluation criteria.

The weight is multiplied by the corresponding criteria score to arrive at the final score for each criterion. The scores are then added together to arrive at the total score for each technology. As a starting point, Table 3-12 summarizes the proposed weights for the FOG mitigation technologies evaluation criteria. These will be refined through discussion with staff.

Table 3-12 Weighting Factors
# Criterion Weight
1 Performance Track Record 7
2 Constructability 10
3 Ease of Operation 5
4 Maintenance Frequency 10
5 Potable Water Use 6
6 Impact on Odor Control 10
7 Impact on Downstream Treatment 10
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8 Impact on Existing Equipment 7
9 Capital Cost 10
10 Operation & Maintenance Cost 7
11 Supplementary Benefits 3
4 Cost Benefit Analysis
The FOG mitigation technologies will be scored based on the evaluation criteria and weighed to arrive at the overall score for each technology. The data will be entered into a spreads heet and the technologies will be ranked in a descending order. An example spreads heet for the evaluation matrix is presented in the Table 4-1.

The CBA will also identify the O&M present worth cost and capital cost to evaluate the alternatives.

The following assumptions will be used in the analysis
x Interest rate 5%
x Escalation rate 3%
x Mechanical equipment life span is 20 years
x Energy cost is $0.285/kWh for BCPS and $0.353/kWh for RBPS x Labor cost $110/hour including benefit
The present worth total O&M cost will be calculated and adjusted to present worth by multiplying the annual O&M cost by the present worth factor (P/Ax Factor). The total present worth cost is the sum of the present worth O&M total cost and total capital cost. The present worth weight adjusted will be calculated by dividing the present worth total cost by the overall weighted score to adjust for cost based on performance.
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Table 4-1 FOG Mitigation Technologies Evaluation Matrix # Technology Type
Criteria Scoring
Overall
Score
Performance Track
Record
Constructability
Ease of Operation
Maintenance
Frequency
Potable Water Use
Impact on Odor
Control
Impact on
Downstream
Treatment
Impact on Existing
Equipment
Capital Cost
Maintenance
Cost
Supplementary
Benefits
Weighting Factor 7 10 5 10 6 10 10 7 10 7 3
1 Anue
Enviroprep
Mechanical
Mixer
2 Flygt -
Adaptive
Mixer
Mechanical
Mixer
3 WILO - EMU Mechanical
Mixer
4 Phi Mixer -
Large Bubble
Bubble
Mixer
5 EnviroMix
BioMix -
Small
Bubbles
Bubble
Mixer
6 Vapex Chemical
Additive
7 MicroBlock Biological
Additive
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FOG Mitigation Technologies for Wetwells at Buena Creek LS

Reference Track
Record
Constructability
Ease of
Operation
Maintenance
Frequency
Potable Water
Use
Impact on Odor
Control
Impact on
Downstream
Treatment
Impact on
Existing
Equipment
Capital Cost
O&M Cost
Supplementary
Benefits
Overall
Score
71 05 1 0 6 1 0 1 0 7 1 0 7 3
1 Anue Enviroprep Surface
Agitator 215 5 5 5 5 2 1 13 53.8
2F l y g t Mechanical
Mixer 222 2 5 5 5 3 3 33 5 5
6 Microblock Biological
Additive 052 1 5 5 3 3 5 13 53.4
3P H i Bubble
Mixer 325 4 5 4 5 5 3 33 64.2
4V a p e x Chemical
Additive 424 3 2 5 1 2 1 14 42.6
5V a u g h a n Chopper
Pump 323 3 5 5 5 4 3 13 5 8
7 No Action Manual 0 5 0 1 0 3 5 2 5 1 2 43.4
FOG Mitigation Technologies for Wetwells at Raceway LS
Reference Track
Record
Constructability
Ease of
Operation
Maintenance
Frequency
Potable Water
Use
Impact on Odor
Control
Impact on
Downstream
Treatment
Impact on
Existing
Equipment
Capital Cost
O&M Cost
Supplementary
Benefits
Overall
Score
71 05 1 0 6 1 0 1 0 7 1 0 7 3
1 Anue Enviroprep Surface
Agitator 215 5 5 5 5 2 1 13 53.8
2F l y g t Mechanical
Mixer 222 1 5 5 5 3 4 33 5 5
8 Microblock Biological
Additive 052 1 5 5 3 3 5 13 53.4
4P H i Bubble
Mixer 325 4 5 4 5 5 3 33 64.2
6V a p e x Chemical
Additive 414 3 2 5 1 1 1 14 39.2
7V a u g h a n Chopper
Pump 323 3 5 5 5 3 4 13 58.6
9 No Action Manual 0 5 0 1 0 3 5 2 5 1 2 43.4
# Technology Type
Criteria Scoring
Weighting Factor
Weighting Factor
# Technology Type
Criteria Scoring
05/13/2025 C9 315 of 1078
Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services

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05/13/2025 C9 316 of 1078
Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services Appendix D. References Surveys
05/13/2025 C9 317 of 1078
Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services

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05/13/2025 C9 318 of 1078
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FOG EQUIPMENT REFERENCES SURVEY

Date: 05/13/2021
Name of Contact: Michelle Buffenbarger
Title: Field Operations Supervisor II
Phone Number: 260-312-5676
Email Address: [email protected]
Name of Facility: Inverness Hills Lift Station
Location of Facility: Hadley Road
Type of Facility: Large Wastewater Lift Station

1. What type of FOG technology you currently have at your facility? ܆Anue Surface Mixer
܆Pneumatic Ejectors
܆High Pressure Water Jets
܈PHi Large Bubble Mixer
܆Enviromix Biomix -Small Bubble
܆Vapex
܆MicroBlock
܆WILO – EMU
܆Vaughn - Chopper Pumps
܆Flygt - Mixer
܈Others, Specify: Protein Matrix Chemical

2. Date equipment insta lled at your facility?

The date that I show this being installed was 2015 (I am not the original installer).

3. Location the equipment installed within the treatment train.

The equipment is installed within a temperature control utility shed, which also houses an air compressor and protein matrix chemical and its pumping equipment. The piping starts at the utility shed and then is piped into the wet well of the lift station. All is not visible to the public.

4. How many units installed?

Specify: We have two stainless steel Large Bubble Mixers installed at the bottom of the wet well. The wet well houses 4 25HP ABS pumps and the lift station a large and 05/13/2025 C9 325 of 1078

rectangular. It is the last lift station that collects multiple basins before reaching the WWTP.

5. What is your working expe rience with the equipment?

The equipment is simple and easy to maintain. We had no experience in this equipment when it first arrived. The maintenance booklet is simple, comprehendible and has great diagrams to assist in doing part replacements. Ordering from the company is easy as well.

6. How do you rate the current condition of the equipment installed at your facility? ܈Good
܆Acceptable
܆Working with minor issues
܆Working with major issues
܆Not working

7. Any mechanical or electrical issues with the equipment since installation? ܆Yes
܈No
If YES describe: ___________________________________________________________

8. How often you do attend to the equipment?
܆Daily
܈Weekly
܆Monthly
܆Quarterly
܆As needed
܆Others, Specify: ____________________________________________________

9. In your estimate, how many hours per we ek spent by your staff attending to or maintaining the equipment?
܈1 hr/week
܆2-4 hr/week
܆4-6 hr/week
܆6-8 hr/week
܆Others, Specify: ____________________________________________________

10. Any ongoing maintenance issues or operational difficulties? Describe.

We had to replace, for the first time since installation, a STC Bowl Assembly with Auto Drain and a STC 25 Micron Filter Element. The cost for these items were $180.00. My employee spent less than an hour replacing those items.

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11. What is the most frequent maintenance issue or item on the equipment? We have not had an frequent maintenance issues to deal with. We do have an air compressor person come in quarterly to do basic PM work on the unit. As long as that is scheduled appropriately then the bubbler unit works great.

How effective the installed equipment in solving your FOG issue. ܈Excellent
܆V. Good
܆Acceptable with minor issues
܆Not at all

12. Did you see any negative impact of the equipment on other treatment processes downstream since installation?
܆Yes
܈No
If YES describe: __________________________________________________________

13. In the past three years, have you contacted the manufacturer or area representative for support or concerns regarding the equipment?
܈Yes
܆No

14. Are you satisfied with the level of support you received from the manufacturer/representative?
܈Yes
܆No
If NO, Why? ____________________________________________________________

15. On a scale of 1 to 10, with 10 being best, how would you rate the equipment performance at your facility.

܆1 ܆2 ܆3 ܆4 ܆5

܆6 ܆7 ܆8 ܆9 ܈10

16. Do you have another type of FOG equipment at your facility, or you have experience with other type in the past?
܆Yes
܈No
If YES, Specify maker and model: _____________________________________________

17. Do you recommend the FOG equipment you currently have at your facility for raw sewage/pump station application?
܈Yes
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܆No
If NO, Why? _____________________________________________________________

18. Before purchasing the FOG equipment currently installed; did you investigate other vendors?
܆Yes
܆No
If YES, Specify vendors and models Prior to my coming in as the Supervisor to this department, another supervisor was in place. He started his adventure with Protein Matrix who then recommended PhI as the vendor they wanted to work with. Rob did a trial run with the two companies before he permanently installed the two systems. It is the two systems combined, that works to eliminate FOG within our wet wells. I do not believe one system alone takes care of the issue. The bubbler disperses that large bubble to cover more bottom to surface mixing, which keep the solids suspended where the Protein Matrix chemical breaks down and destroys the structure of FOG so that it is passed through the pumps and down through the system. The FOG structure is destroyed and is no longer able to restructure itself back into solid FOG and therefore, does not create potential blockage downstream.

19. Would you like to add any comments or suggestions?

If you are interested in seeing before and after pictures I will be glad to submit those to you as well.

Comments:
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05/13/2025 C9 328 of 1078

FOG EQUIPMENT REFERENCES SURVEY

Date: 5/12/2021
Name of Contact: Aurelio Mares
Title: Facilities manager
Phone Number: 951-775-7921
Email Address: [email protected]
Name of Facility: Pechanga resort and casino
Location of Facility: Temecula Ca
Type of Facility: Operation

1. What type of FOG technology you currently have at your facility? ܆Anue Surface Mixer
܆Pneumatic Ejectors
܆High Pressure Water Jets
܆PHi Large Bubble Mixer
܆Enviromix Biomix -Small Bubble
܈Vapex
܆MicroBlock
܆WILO – EMU
܆Vaughn - Chopper Pumps
܆Flygt - Mixer
܆Others, Specify: ____________________________________________________

2. Date equipment installed at your facility?

______________ year 2010 ______________________________________________

3. Location the equipment installed within the treatment train. (3) 18,000gal Grease interceptors

____________________ 3 interceptors @ 18,000gal __ ________________

4. How many units installed?

Specify: ___________1 Vapex services the three interceptor___________________

5. What is your working experience with the equipment?
05/13/2025 C9 329 of 1078

_______basic filter change out and cleaning fog heads to the interceptors __________

________________________________________________________________________

6. How do you rate the current condition of the equipment installed at your facility? ܆Good
܈Acceptable
܆Working with minor issues
܆Working with major issues
܆Not working

7. Any mechanical or electrical issues with the equipment since installation? ܆Yes
܆No
If YES describe: we have changed out 1 compressor and 3 fog heads ozone canister _______________________________________________

8. How often you do attend to the equipment?
܆Daily
܈Weekly
܆Monthly
܆Quarterly
܆As needed
܆Others, Specify: ____________________________________________________

9. In your estimate, how many hours per week spent by your staff attending to or maintaining the equipment?
܆1 hr/week
܈2-4 hr/week
܆4-6 hr/week
܆6-8 hr/week
܆Others, Specify: ____________________________________________________

10. Any ongoing maintenance issues or operational difficulties? Describe. ______the equipment is basic once you send sometime with the unit __________

________________________________________________________________________

11. What is the most frequent maintenance issue or item on the equipment?

_________________basic service attention ________________________

05/13/2025 C9 330 of 1078

________________________________________________________________________

12. How effective the installed equipment in solving your FOG issue . ܆Excellent
܆V. Good
܈Acceptable with minor issues
܆Not at all

13. Did you see any negative impact of the equipment on other treatment processes downstream since installation?
܆Yes
܆No
If YES describe: the ozone fog is corrosive ____________________________________

14. In the past three years, have you contacted the manufacturer or area representative for support or concerns regarding the equipment?
܆Yes
܈No

15. Are you satisfied with the level of support you received from the manufacturer/representative?
܈Yes
܆No
If NO, Why? ____________________________________________________________

16. On a scale of 1 to 10, with 10 being best, how would you rate the equipment performance at your facility.

܆1 ܆2 ܆3 ܆4 ܆5

܆6 ܆7 ܈8 ܆9 ܆10

17. Do you have another type of FOG equipment at your facility, or you have experience with other type in the past?
܆Yes
܈No
If YES, Specify maker and model: _____________________________________________

18. Do you recommend the FOG equipment you currently have at your facility for raw sewage/pump station application?
܈Yes
܆No
If NO, Why? _____________________________________________________________ 05/13/2025 C9 331 of 1078

19. Before purchasing the FOG equipment currently installed; did you investigate other vendors?
܈Yes
܆No
If YES, Specify vendors and models: _____I don’t remember the others _______________
________________________________________________________________________

20. Would you like to add any comments or suggestions?

_____________it work well for what we need ______________________________ ________________________________________________________________________ Comments:
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05/13/2025 C9 332 of 1078

FOG EQUIPMENT REFERENCES SURVEY

Date: 5/15/2021
Name of Contact: Sang Douangpannha
Title: Senior Wastewater Operator
Phone Number: (831)420-6043
Email Address: [email protected]
Name of Facility: City of Santa Cruz Wastewater Treatment Facility Location of Facility: 110 California St, Santa Cruz, CA 95060 Type of Facility: Wastewater: trickling filter/secondary clarifier

1. What type of FOG technology you currently have at your facility? ܆Anue Surface Mixer
܆Pneumatic Ejectors
܆High Pressure Water Jets
܆PHi Large Bubble Mixer
܆Enviromix Biomix -Small Bubble
܈Vapex
܆MicroBlock
܆WILO – EMU
܆Vaughn - Chopper Pumps
܆Flygt - Mixer
܆Others, Specify: ____________________________________________________

2. Date equipment installed at your facility?

_1/15/2014, 6/24/2015, 4/22/2020__________________________________________

3. Location the equipment installed within the treatment train.

_Headworks (pre-grit, county influent), primary sedimentation tank effluent channel, solids dewatering building, secondary treatment (trickling filter exhaust, mix-liquor channel, RSS/TFE channels)

4. How many units installed? 8 Units

Specify: _1500 model (County influent channel), V1500 4 units (SDB, PSS 1&2, PSS 3&4, PSS 5&6), PLC 3500 2 units (Secondaries #1, Secondaries #2), Milli Unit (PGRS)

05/13/2025 C9 333 of 1078

5. What is your working experience with the equipment?

Startup, maintenance, operation, and troubleshooting______________________

6. How do you rate the current condition of the equipment installed at your facility? ܈Good
܆Acceptable
܆Working with minor issues
܆Working with major issues
܆Not working

7. Any mechanical or electrical issues with the equipment since installation? ܈Yes
܆No
If YES describe: _rotameters to adjust carrier water flow will seize depending on water hardness (PM involving running CLR through system helps), exhaust fan replaced, replaced compressors, touchpad on new Milli-unit was unresponsive and was replaced

8. How often you do attend to the equipment?
܆Daily
܈Weekly
܆Monthly
܆Quarterly
܆As needed
܆Others, Specify: ____________________________________________________

9. In your estimate, how many hours per week spent by your staff attending to or maintaining the equipment?
܆1 hr/week
܈2-4 hr/week
܆4-6 hr/week
܆6-8 hr/week
܆Others, Specify: ____________________________________________________

10. Any ongoing maintenance issues or operational difficulties? Describe. _mineral build-up at nozzle head can impede oxidant flow (weekly PM is to clean nozzle head), water bowl (condensation trap) float valve has been replaced with a timed solenoid due to over purging if debris present, installation height may effect ease in maintenance (some units installed on stand to elevate height)

11. What is the most frequent maintenance issue or item on the equipment? Nozzle head cleaning (weekly)

05/13/2025 C9 334 of 1078

12. How effective the installed equipment in solving your FOG issue . ܆Excellent
܆V. Good
܈Acceptable with minor issues (installed for H 2S reduction) ܆Not at all

13. Did you see any negative impact of the equipment on other treatment processes downstream since installation?
܈Yes
܆No
If YES describe: _Can be corrosive to none stainless steel equipment fittings, on secondary side the units are in-line with carbon media odor reduction towers and the fluid may affect downstream media

14. In the past three years, have you contacted the manufacturer or area representative for support or concerns regarding the equipment?
܈Yes
܆No

15. Are you satisfied with the level of support you received from the manufacturer/representative?
܈Yes
܆No
If NO, Why? ____________________________________________________________

16. On a scale of 1 to 10, with 10 being best, how would you rate the equipment performance at your facility.

܆1 ܆2 ܆3 ܆4 ܆5

܆6 ܆7 ܆8 ܈9 ܆10

17. Do you have another type of FOG equipment at your facility, or you have experience with other type in the past?
܆Yes
܈No
If YES, Specify maker and model: _____________________________________________

18. Do you recommend the FOG equipment you currently have at your facility for raw sewage/pump station application?
܈Yes
܆No
If NO, Why? _____________________________________________________________ 05/13/2025 C9 335 of 1078

19. Before purchasing the FOG equipment currently installed; did you investigate other vendors?
܆Yes
܈No
If YES, Specify vendors and models: ___________________________________________ ________________________________________________________________________

20. Would you like to add any comments or suggestions?

________________________________________________________________________ ________________________________________________________________________ Comments:
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05/13/2025 C9 336 of 1078

FOG EQUIPMENT REFERENCES SURVEY

Date: 5/17/2021
Name of Contact: Robert Rodriguez
Title: Senior Plant Technician I/C and Electrical Supervisor Phone Number: 619 428-7316
Email Address: [email protected]
Name of Facility:

South Bay Water Reclamation Plant/Grove Ave P.S
& Otay River P.S.

Location of Facility: 2411 Dairy Mart Road
Type of Facility: Water Reclamation

1. What type of FOG technology you currently have at your facility? ܆Anue Surface Mixer
܆Pneumatic Ejectors
܆High Pressure Water Jets
܆PHi Large Bubble Mixer
܆Enviromix Biomix -Small Bubble
܆Vapex
܆MicroBlock
܆WILO – EMU
܈Vaughn - Chopper Pumps
܆Flygt - Mixer
܆Others, Specify: ____________________________________________________

2. Date equipment installed at your facility?

Vaughan pumps were installed over 10 years ago at the Otay river pump station and Grove avenue Pump station is undergoing the upgrade to Vaughan all because of clogging issues.

3. Location the equipment installed within the treatment train.

Otay River Pump Station, Grove Avenue Pump Station and various sections of the facility

4. How many units installed?

Specify: (5) submersibles at Otay River (2) 40hp & (3) 200hp Grove avenue undergoing replacement. (2) out of the (5) replaced. (1) submersible and (1) same design at wet well level running a 300 hp motor
05/13/2025 C9 337 of 1078

5. What is your working experience with the equipment?

Working with Vaughan over 25 years

6. How do you rate the current condition of the equipment installed at your facility? ܈Good
܆Acceptable
܆Working with minor issues
܆Working with major issues
܆Not working

7. Any mechanical or electrical issues with the equipment since installation? ܈Yes
܆No
If YES describe:

Problem with the installation, nothing Vaughan had done and a VFD problem, again not Vaughan

8. How often you do attend to the equipment?
܆Daily
܆Weekly
܆Monthly
܆Quarterly
܈As needed
܆Others, Specify: ____________________________________________________

9. In your estimate, how many hours per week spent by your staff attending to or maintaining the equipment?
܆1 hr/week
܆2-4 hr/week
܆4-6 hr/week
܆6-8 hr/week
܈Others, Specify: on the rare occasion that it gets clogged. Once pump is cleared it goes right back in service

10. Any ongoing maintenance issues or operational difficulties? Describe.

No

11. What is the most frequent maintenance issue or item on the equipment? None, they have only been in service 20+ years, I’ll need to get back to you on this.

05/13/2025 C9 338 of 1078

12. How effective the installed equipment in solving your FOG issue . ܈Excellent
܆V. Good
܆Acceptable with minor issues
܆Not at all

13. Did you see any negative impact of the equipment on other treatment processes downstream since installation?
܆Yes
܈No
If YES describe: __________________________________________________________

14. In the past three years, have you contacted the manufacturer or area representative for support or concerns regarding the equipment?
܈Yes
܆No

15. Are you satisfied with the level of support you received from the manufacturer/representative?
܈Yes
܆No
If NO, Why? ____________________________________________________________

16. On a scale of 1 to 10, with 10 being best, how would you rate the equipment performance at your facility.

܆1 ܆2 ܆3 ܆4 ܆5

܆6 ܆7 ܆8 ܆9 ܈10

17. Do you have another type of FOG equipment at your facility, or you have experience with other type in the past?
܆Yes
܈No
If YES, Specify maker and model: _____________________________________________

18. Do you recommend the FOG equipment you currently have at your facility for raw sewage/pump station application?
܈Yes
܆No
If NO, Why? _____________________________________________________________

19. Before purchasing the FOG equipment currently installed; did you investigate other vendors?
05/13/2025 C9 339 of 1078

܈Yes
܆No

If YES, Specify vendors and models: __none of the other vendors had the same chopping capabilities

20. Would you like to add any comments or suggestions?
Comments:

Depending on the severity of the pumping problems a conditioning pump keeps the wet wells clear of any build up. we no longer need to clean out the wet wells with the conditioning pumps installed
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05/13/2025 C9 340 of 1078

FOG EQUIPMENT REFERENCES SURVEY

Date: 5/26/2021
Name of Contact: Dominic Brunozzi
Title: Pump/Motor Tech II
Phone Number: 760-415-5781
Email Address: [email protected]
Name of Facility: Fire House Sewer Pump Station
Location of Facility: 4S Ranch, San Diego, CA
Type of Facility: Sewer pump station

1. What type of FOG technology you currently have at your facility? ܆Anue Surface Mixer
܆Pneumatic Ejectors
܆High Pressure Water Jets
܆PHi Large Bubble Mixer
܆Enviromix Biomix -Small Bubble
܆Vapex
܆MicroBlock
܆WILO – EMU
܈Vaughn - Chopper Pumps
܆Flygt - Mixer
܆Others, Specify: ____________________________________________________

2. Date equipment installed at your facility?

March 2017____________________________________________________________

3. Location the equipment installed within the treatment train.

Sewer Pump Station______________________________________________________

4. How many units installed?

Specify: One______________________________________________________________

5. What is your working experience with the equipment?

________________________________________________________________________

05/13/2025 C9 341 of 1078

________________________________________________________________________

6. How do you rate the current condition of the equipment installed at your facility? ܈Good
܆Acceptable
܆Working with minor issues
܆Working with major issues
܆Not working

7. Any mechanical or electrical issues with the equipment since installation? ܆Yes
܈No
If YES describe: ___________________________________________________________

8. How often you do attend to the equipment?
܆Daily
܆Weekly
܆Monthly
܆Quarterly
܆As needed
܈Others, Specify: Annual Inspection. No mechanical issues have arisen.

9. In your estimate, how many hours per week spent by your staff attending to or maintaining the equipment?
܆1 hr/week
܆2-4 hr/week
܆4-6 hr/week
܆6-8 hr/week
܈Others, Specify: Weekly inspection of wet well determines equipment effectiveness.

10. Any ongoing maintenance issues or operational difficulties? Describe.

None___________________________________________________________________

________________________________________________________________________

11. What is the most frequent maintenance issue or item on the equipment?

Annual inspection requires removal of pump.

12. How effective the installed equipment in solving your FOG issue . ܈Excellent
܆V. Good
05/13/2025 C9 342 of 1078

܆Acceptable with minor issues
܆Not at all

13. Did you see any negative impact of the equipment on other treatment processes downstream since installation?
܆Yes
܈No
If YES describe: _____________________________________________________ _____

14. In the past three years, have you contacted the manufacturer or area representative for support or concerns regarding the equipment?
܆Yes
܈No

15. Are you satisfied with the level of support you received from the manufacturer/representative?
܈Yes
܆No
If NO, Why? ____________________________________________________________

16. On a scale of 1 to 10, with 10 being best, how would you rate the equipment performance at your facility.

܆1 ܆2 ܆3 ܆4 ܆5

܆6 ܆7 ܆8 ܆9 ܈10

17. Do you have another type of FOG equipment at your facility, or you have experience with other type in the past?
܆Yes
܈No
If YES, Specify maker and model: _____________________________________________

18. Do you recommend the FOG equipment you currently have at your facility for raw sewage/pump station application?
܆Yes
܆No
If NO, Why? _____________________________________________________________

19. Before purchasing the FOG equipment currently installed; did you investigate other vendors?
܈Yes
܆No
05/13/2025 C9 343 of 1078

If YES, Specify vendors and models: In-line pump suction grinders, wet well inlet grinders, bubbler mixers, grinder pumps, vertical auger.

20. Would you like to add any comments or suggestions?

In the past, the pump station required FOG & Rags to be pumped by on outside vendor on a quarterly schedule to prevent excessive buildup and pump clogging. Since installation of conditioning pump, wet well required no pumping for FOG & Rags removal.

Comments:
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05/13/2025 C9 344 of 1078

FOG EQUIPMENT REFERENCES SURVEY

Date: 5/3/2021
Name of Contact: Jennifer Gonzalez
Title: Engineering Manager
Phone Number: 831-883-6172
Email Address: [email protected]
Name of Facility: Monterey One Water- Castroville Pump Station Location of Facility: Watsonville Road, Castroville CA 95012 Type of Facility: Wastewater Pump Station

1. What type of FOG technology you currently have at your facility? ܆Anue Surface Mixer
܆Pneumatic Ejectors
܆High Pressure Water Jets
܈PHi Large Bubble Mixer
܆Enviromix Biomix -Small Bubble
܆Vapex
܆MicroBlock
܆WILO – EMU
܆Vaughn - Chopper Pumps
܆Flygt - Mixer
܆Others, Specify: ____________________________________________________

2. Date equipment installed at your facility?

_Summer 2018 _________________________________________________________

3. Location the equipment installed within the treatment train.

In Wet Well of Castroville pump station_

4. How many units installed?

Specify: ___1 air compressor, 8 large bubble plate units _____________________

5. What is your working experience with the equipment?

______Very easy to operate and maintain. We have been able to optimize the system for energy savings. Changes are easy to make and show quick results. 05/13/2025 C9 345 of 1078

6. How do you rate the current condition of the equipment installed at your facility? ܈Good
܆Acceptable
܆Working with minor issues
܆Working with major issues
܆Not working

7. Any mechanical or electrical issues with the equipment since installation? ܆Yes
܈No
If YES describe: ___________________________________________________________

8. How often you do attend to the equipment?
܆Daily
܈Weekly
܆Monthly
܆Quarterly
܆As needed
܆Others, Specify: ____________________________________________________

9. In your estimate, how many hours per week spent by your staff attending to or maintaining the equipment?
܈1 hr/week
܆2-4 hr/week
܆4-6 hr/week
܆6-8 hr/week
܆Others, Specify: ____________________________________________________

10. Any ongoing maintenance issues or operational difficulties? Describe. _____No________________________________________________________________

________________________________________________________________________

11. What is the most frequent maintenance issue or item on the equipment?

___Checking that the compressor timing is optimized.

________________________________________________________________________

12. How effective the installed equipment in solving your FOG issue . ܈Excellent
܆V. Good
܆Acceptable with minor issues
05/13/2025 C9 346 of 1078

܆Not at all

13. Did you see any negative impact of the equipment on other treatment processes downstream since installation?
܆Yes
܈No
If YES describe: __________________________________________________________

14. In the past three years, have you contacted the manufacturer or area representative for support or concerns regarding the equipment?
܆Yes
܈No

15. Are you satisfied with the level of support you received from the manufacturer/representative?
܆Yes
܆No
If NO, Why? ____________________________________________________________

16. On a scale of 1 to 10, with 10 being best, how would you rate the equipment performance at your facility.

܆1 ܆2 ܆3 ܆4 ܆5

܆6 ܆7 ܆8 ܆9 ܈10

17. Do you have another type of FOG equipment at your facility, or you have experience with other type in the past?
܆Yes
܈No
If YES, Specify maker and model: _____________________________________________

18. Do you recommend the FOG equipment you currently have at your facility for raw sewage/pump station application?
܈Yes
܆No
If NO, Why? _____________________________________________________________

19. Before purchasing the FOG equipment currently installed; did you investigate other vendors?
܆Yes
܈No
If YES, Specify vendors and models: ___________________________________________ 05/13/2025 C9 347 of 1078

________________________________________________________________________

20. Would you like to add any comments or suggestions?

________________________________________________________________________ ________________________________________________________________________ Comments:
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Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services Appendix E. Engineer’s Probable Construction
Cost Opinion
05/13/2025 C9 353 of 1078
Fats, Oils, and Grease Mitigation Recommendation Technical Memorandum Raceway Basin and Buena Creek Pump Stations Improvement Study and Owner’s Advisor Services

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05/13/2025 C9 354 of 1078
City of Vista
FOG Mitigation Study
FOG Mitigation Technology Alternatives Cost Comparison
Buena Creek Pump Station
Manufacturer Anue Enviro-Prep MicroBlock PHi Vapex Vaughan Flygt No Action 20 Year Life-Cycle Cost $ 770,717 $ 407,534 $ 427,118 $ 758,267 $ 605,286 $ 452,567 $ 707,923 Total Capital Cost $ 317,932 $ 5,877 $ 285,731 $ 394,654 $ 171,786 $ 202,865 $ - Energy Consumption Cost $ 346,373 $ - $ 84,393 $ 179,266 $ 337,573 $ 202,544 $ - Routine Maintenance Cost $ 106,412 $ 401,657 $ 56,994 $ 184,347 $ 95,927 $ 47,158 $ 707,923 Equipment Cost $ 78,000 $ 2,200 $ 70,100 $ 91,698 $ 39,525 $ 49,770 Annual Energy Cost $ 17,319 $ - $ 4,220 $ 8,963 $ 16,879 $ 10,127 $ - Annual O&M Cost $ 5,321 $ 20,083 $ 2,850 $ 9,217 $ 4,796 $ 2,358 $ 35,396 Raceway Pump Station
Manufacturer Anue Enviro-Prep MicroBlock PHi Vapex Vaughan Flygt No Action 20 Year Life-Cycle Cost $ 360,110 $ 266,717 $ 274,746 $ 780,151 $ 239,092 $ 177,771 $ 366,785 Total Capital Cost $ 143,925 $ 3,345 $ 165,488 $ 373,766 $ 65,033 $ 71,514 $ - Energy Consumption Cost $ 165,594 $ - $ 52,265 $ 222,039 $ 104,529 $ 83,623 $ - Routine Maintenance Cost $ 50,591 $ 263,372 $ 56,994 $ 184,347 $ 69,530 $ 22,634 $ 366,785 Equipment Cost $ 35,310 $ 400 $ 40,600 $ 91,698 $ 15,955 $ 17,545 Annual Energy Cost $ 8,280 $ - $ 2,613 $ 11,102 $ 5,226 $ 4,181 $ - Annual O&M Cost $ 2,530 $ 13,169 $ 2,850 $ 9,217 $ 3,476 $ 1,132 $ 18,339 05/13/2025 C9 355 of 1078
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BCPS
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
317,932$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 317,932 $ 317,932 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 346,373 $ - $ 19,548$ 20,525 $ 21,552 $ 22,629 $ 23,761 $ 24,949 $ 26,196 $ 27,506 $ 28,881 $ 30,325 $ Maintenance 106,412 $ - $ 6,468$ 6,662 $ 6,862 $ 7,068 $ 7,280 $ 7,499 $ 7,724 $ 7,955 $ 8,194 $ 36,662 $ Annual Costs 26,016 $ 27,188 $ 28,414 $ 29,697 $ 31,041 $ 32,447 $ 33,920 $ 35,461 $ 37,075 $ 66,987 $ Total Present Worth 770,717$ 342,476 $ 366,673 $ 390,530 $ 414,053 $ 437,249 $ 460,123 $ 482,681 $ 504,930 $ 526,875 $ 564,280 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 31,842 $ 33,434 $ 35,105 $ 36,861 $ 38,704 $ 40,639 $ 42,671 $ 44,804 $ 47,045 $ 77,619 $ Maintenance 8,693 $ 8,954 $ 9,222 $ 9,499 $ 9,784 $ 10,078 $ 10,380 $ 10,691 $ 11,012 $ - Annual Costs 40,535 $ 42,387 $ 44,328 $ 46,360 $ 48,488 $ 50,716 $ 53,051 $ 55,496 $ 58,057 $ 77,619 $ Total Present Worth 585,634 $ 606,699 $ 627,481 $ 647,986 $ 668,219 $ 688,183 $ 707,884 $ 727,327 $ 746,515 $ 770,717 $ 18,617$ 6,280$
Anue
20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
Year by Year Life Cycle Cost Table
Cost Category
05/13/2025 C9 358 of 1078
BCPS
Microblock
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
5,877$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 5,877 $ 5,877 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 401,657 $ - $ 27,583$ 28,411 $ 29,263 $ 30,141 $ 31,045 $ 31,977 $ 32,936 $ 33,924 $ 34,942 $ 35,990 $ Annual Costs 27,583 $ 28,411 $ 29,263 $ 30,141 $ 31,045 $ 31,977 $ 32,936 $ 33,924 $ 34,942 $ 35,990 $ Total Present Worth 407,534$ 31,899 $ 57,185 $ 81,755 $ 105,629 $ 128,828 $ 151,371 $ 173,275 $ 194,559 $ 215,241 $ 235,338 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 37,070 $ 38,182 $ 39,327 $ 40,507 $ 41,722 $ 42,974 $ 44,263 $ 45,591 $ 46,959 $ 48,368 $ Annual Costs 37,070 $ 38,182 $ 39,327 $ 40,507 $ 41,722 $ 42,974 $ 44,263 $ 45,591 $ 46,959 $ 48,368 $ Total Present Worth 254,866 $ 273,841 $ 292,279 $ 310,196 $ 327,605 $ 344,522 $ 360,959 $ 376,932 $ 392,453 $ 407,534 $ 20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
-$ 26,780$
Year by Year Life Cycle Cost Table
Cost Category
05/13/2025 C9 359 of 1078
BCPS
PHi
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
285,731$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 285,731 $ 285,731 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 84,393 $ - $ 4,887$ 5,131 $ 5,388 $ 5,657 $ 5,940 $ 6,237 $ 6,549 $ 6,877 $ 7,220 $ 7,581 $ Maintenance 56,994 $ - $ 3,914$ 4,031 $ 4,152 $ 4,277 $ 4,405 $ 4,537 $ 4,674 $ 4,814 $ 4,958 $ 5,107 $ Annual Costs 8,801 $ 9,163 $ 9,540 $ 9,934 $ 10,345 $ 10,775 $ 11,223 $ 11,690 $ 12,178 $ 12,688 $ Total Present Worth 427,118$ 294,034 $ 302,189 $ 310,199 $ 318,068 $ 325,799 $ 333,394 $ 340,858 $ 348,193 $ 355,401 $ 362,486 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 7,960 $ 8,358 $ 8,776 $ 9,215 $ 9,676 $ 10,160 $ 10,668 $ 11,201 $ 11,761 $ 12,349 $ Maintenance 5,260 $ 5,418 $ 5,580 $ 5,748 $ 5,920 $ 6,098 $ 6,281 $ 6,469 $ 6,663 $ 6,863 $ Annual Costs 13,220 $ 13,776 $ 14,357 $ 14,963 $ 15,596 $ 16,258 $ 16,949 $ 17,670 $ 18,424 $ 19,212 $ Total Present Worth 369,450 $ 376,297 $ 383,028 $ 389,646 $ 396,154 $ 402,553 $ 408,848 $ 415,038 $ 421,128 $ 427,118 $ 20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
4,654$ 3,800$
Cost Category
Year by Year Life Cycle Cost Table
05/13/2025 C9 360 of 1078
BCPS
Vapex
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
394,654$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 394,654 $ 394,654 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 179,266 $ - $ 10,381$ 10,900 $ 11,445 $ 12,017 $ 12,618 $ 13,249 $ 13,911 $ 14,607 $ 15,337 $ 16,104 $ Maintenance 184,347 $ - $ 4,388$ 4,519 $ 4,655 $ 4,795 $ 4,939 $ 5,087 $ 5,239 $ 5,396 $ 5,558 $ 128,960$ Annual Costs 14,769 $ 15,419 $ 16,100 $ 16,812 $ 17,557 $ 18,336 $ 19,151 $ 20,003 $ 20,896 $ 145,064 $ Total Present Worth 758,267$ 408,587 $ 422,310 $ 435,828 $ 449,144 $ 462,264 $ 475,189 $ 487,926 $ 500,476 $ 512,844 $ 593,847 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 16,909 $ 17,755 $ 18,643 $ 19,575 $ 20,553 $ 21,581 $ 22,660 $ 23,793 $ 24,983 $ 26,232 $ Maintenance 5,897 $ 6,074 $ 6,256 $ 6,444 $ 6,637 $ 6,836 $ 7,041 $ 7,252 $ 7,470 $ 173,311$ Annual Costs 22,806 $ 23,829 $ 24,898 $ 26,018 $ 27,190 $ 28,417 $ 29,701 $ 31,045 $ 32,453 $ 199,543 $ Total Present Worth 605,861 $ 617,703 $ 629,376 $ 640,884 $ 652,230 $ 663,416 $ 674,446 $ 685,323 $ 696,049 $ 758,267 $ 20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
9,887$ 4,260$
Year by Year Life Cycle Cost Table
Cost Category
05/13/2025 C9 361 of 1078
BCPS
Vaughan
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
171,786$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 171,786 $ 171,786 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 337,573 $ - $ 19,548$ 20,525 $ 21,552 $ 22,629 $ 23,761 $ 24,949 $ 26,196 $ 27,506 $ 28,881 $ 30,325 $ Maintenance 95,927 $ - $ 5,686$ 5,856 $ 6,032 $ 6,213 $ 6,399 $ 6,591 $ 6,789 $ 6,993 $ 7,202 $ 20,858 $ Annual Costs 25,234 $ 26,382 $ 27,584 $ 28,842 $ 30,160 $ 31,540 $ 32,985 $ 34,499 $ 36,084 $ 51,183 $ Total Present Worth 605,286$ 195,591 $ 219,071 $ 242,230 $ 265,076 $ 287,613 $ 309,848 $ 331,785 $ 353,429 $ 374,787 $ 403,368 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 31,842 $ 33,434 $ 35,105 $ 36,861 $ 38,704 $ 40,639 $ 42,671 $ 44,804 $ 47,045 $ 49,397 $ Maintenance 7,641 $ 7,870 $ 8,106 $ 8,349 $ 8,600 $ 8,858 $ 9,124 $ 9,397 $ 9,679 $ 28,031 $ Annual Costs 39,483 $ 41,304 $ 43,212 $ 45,210 $ 47,304 $ 49,497 $ 51,795 $ 54,202 $ 56,724 $ 77,428 $ Total Present Worth 424,167 $ 444,693 $ 464,953 $ 484,949 $ 504,687 $ 524,172 $ 543,406 $ 562,396 $ 581,144 $ 605,286 $ 20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
18,617$ 5,520$
Cost Category
Year by Year Life Cycle Cost Table
05/13/2025 C9 362 of 1078
BCPS
Flygt
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
202,865$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 202,865 $ 202,865 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 202,544 $ - $ 11,729$ 12,315 $ 12,931 $ 13,578 $ 14,256 $ 14,969 $ 15,718 $ 16,504 $ 17,329 $ 18,195 $ Maintenance 47,158 $ - $ 906 $ 934 $ 962 $ 990 $ 14,931$ 1,051 $ 1,082 $ 1,115 $ 1,148 $ 17,310 $ Annual Costs 12,635 $ 13,249 $ 13,893 $ 14,568 $ 29,188 $ 16,020 $ 16,800 $ 17,618 $ 18,477 $ 35,505 $ Total Present Worth 452,567$ 214,785 $ 226,577 $ 238,241 $ 249,780 $ 271,591 $ 282,885 $ 294,058 $ 305,112 $ 316,048 $ 335,874 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 19,105 $ 20,060 $ 21,063 $ 22,116 $ 23,222 $ 24,383 $ 25,603 $ 26,883 $ 28,227 $ 29,638 $ Maintenance 1,218 $ 1,255 $ 1,292 $ 1,331 $ 20,067 $ 1,412 $ 1,455 $ 1,498 $ 1,543 $ 23,263 $ Annual Costs 20,323 $ 21,315 $ 22,356 $ 23,447 $ 43,289 $ 25,795 $ 27,057 $ 28,381 $ 29,770 $ 52,901 $ Total Present Worth 346,580 $ 357,173 $ 367,654 $ 378,025 $ 396,088 $ 406,242 $ 416,290 $ 426,233 $ 436,072 $ 452,567 $ 20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
11,170$ 880$
Year by Year Life Cycle Cost Table
Cost Category
05/13/2025 C9 363 of 1078
BCPS
No Action
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
-$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 707,923 $ - $ 48,616$ 50,074 $ 51,577 $ 53,124 $ 54,718 $ 56,359 $ 58,050 $ 59,792 $ 61,585 $ 63,433 $ Annual Costs 48,616 $ 50,074 $ 51,577 $ 53,124 $ 54,718 $ 56,359 $ 58,050 $ 59,792 $ 61,585 $ 63,433 $ Total Present Worth 707,923$ 45,864 $ 90,430 $ 133,735 $ 175,814 $ 216,703 $ 256,434 $ 295,040 $ 332,554 $ 369,006 $ 404,427 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 65,336 $ 67,296 $ 69,315 $ 71,394 $ 73,536 $ 75,742 $ 78,014 $ 80,355 $ 82,765 $ 85,248 $ Annual Costs 65,336 $ 67,296 $ 69,315 $ 71,394 $ 73,536 $ 75,742 $ 78,014 $ 80,355 $ 82,765 $ 85,248 $ Total Present Worth 438,845 $ 472,289 $ 504,787 $ 536,364 $ 567,048 $ 596,864 $ 625,836 $ 653,988 $ 681,343 $ 707,923 $ Year by Year Life Cycle Cost Table
Cost Category
20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
-$ 47,200$
05/13/2025 C9 364 of 1078
RBPS
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
143,925$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 143,925 $ 143,925 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 165,594 $ - $ 9,080$ 9,534 $ 10,010 $ 10,511 $ 11,036 $ 11,588 $ 12,167 $ 12,776 $ 13,415 $ 14,085 $ Maintenance 50,591 $ - $ 2,843$ 2,928 $ 3,016 $ 3,106 $ 3,200 $ 3,296 $ 3,394 $ 3,496 $ 3,601 $ 13,117 $ Annual Costs 11,922 $ 12,462 $ 13,026 $ 13,617 $ 14,236 $ 14,884 $ 15,562 $ 16,272 $ 17,016 $ 27,202 $ Total Present Worth 360,110$ 155,173 $ 166,264 $ 177,201 $ 187,987 $ 198,624 $ 209,117 $ 219,466 $ 229,676 $ 239,747 $ 254,937 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 14,790 $ 15,529 $ 16,306 $ 17,121 $ 17,977 $ 18,876 $ 19,819 $ 20,810 $ 21,851 $ 51,166 $ Maintenance 3,820 $ 3,935 $ 4,053 $ 4,175 $ 4,300 $ 4,429 $ 4,562 $ 4,699 $ 4,840 $ 17,628 $ Annual Costs 18,610 $ 19,464 $ 20,359 $ 21,296 $ 22,277 $ 23,305 $ 24,381 $ 25,509 $ 26,691 $ 68,793 $ Total Present Worth 264,740 $ 274,413 $ 283,958 $ 293,377 $ 302,673 $ 311,847 $ 320,901 $ 329,838 $ 338,660 $ 360,110 $ Cost Category
Anue
20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
8,647$ 2,760$
Year by Year Life Cycle Cost Table
05/13/2025 C9 365 of 1078
RBPS
Microblock
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
3,345$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 3,345 $ 3,345 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 263,372 $ - $ 18,087$ 18,629 $ 19,188 $ 19,764 $ 20,357 $ 20,968 $ 21,597 $ 22,244 $ 22,912 $ 23,599 $ Annual Costs 18,087 $ 18,629 $ 19,188 $ 19,764 $ 20,357 $ 20,968 $ 21,597 $ 22,244 $ 22,912 $ 23,599 $ Total Present Worth 266,717$ 20,408 $ 36,988 $ 53,099 $ 68,754 $ 83,966 $ 98,747 $ 113,110 $ 127,067 $ 140,628 $ 153,806 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 24,307 $ 25,036 $ 25,787 $ 26,561 $ 27,358 $ 28,179 $ 29,024 $ 29,895 $ 30,792 $ 31,715 $ Annual Costs 24,307 $ 25,036 $ 25,787 $ 26,561 $ 27,358 $ 28,179 $ 29,024 $ 29,895 $ 30,792 $ 31,715 $ Total Present Worth 166,611 $ 179,053 $ 191,143 $ 202,891 $ 214,307 $ 225,399 $ 236,177 $ 246,651 $ 256,828 $ 266,717 $ Cost Category
20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
-$ 17,560$
Year by Year Life Cycle Cost Table
05/13/2025 C9 366 of 1078
RBPS
PHi
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
165,488$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 165,488 $ 165,488 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 52,265 $ - $ 3,027$ 3,178 $ 3,337 $ 3,504 $ 3,679 $ 3,863 $ 4,056 $ 4,259 $ 4,472 $ 4,695 $ Maintenance 56,994 $ - $ 3,914$ 4,031 $ 4,152 $ 4,277 $ 4,405 $ 4,537 $ 4,674 $ 4,814 $ 4,958 $ 5,107 $ Annual Costs 6,941 $ 7,209 $ 7,489 $ 7,780 $ 8,084 $ 8,400 $ 8,729 $ 9,072 $ 9,430 $ 9,802 $ Total Present Worth 274,746$ 172,035 $ 178,452 $ 184,740 $ 190,902 $ 196,943 $ 202,865 $ 208,670 $ 214,363 $ 219,944 $ 225,417 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 4,930 $ 5,176 $ 5,435 $ 5,707 $ 5,992 $ 6,292 $ 6,606 $ 6,937 $ 7,284 $ 7,648 $ Maintenance 5,260 $ 5,418 $ 5,580 $ 5,748 $ 5,920 $ 6,098 $ 6,281 $ 6,469 $ 6,663 $ 6,863 $ Annual Costs 10,190 $ 10,594 $ 11,016 $ 11,455 $ 11,913 $ 12,390 $ 12,887 $ 13,406 $ 13,947 $ 14,511 $ Total Present Worth 230,785 $ 236,050 $ 241,215 $ 246,281 $ 251,252 $ 256,129 $ 260,915 $ 265,612 $ 270,222 $ 274,746 $ Cost Category
Year by Year Life Cycle Cost Table
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
20-Year Life-Cycle Cost Estimate
2,882$ 3,800$
05/13/2025 C9 367 of 1078
RBPS
Vapex
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
373,766$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 373,766 $ 373,766 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 222,039 $ - $ 12,858$ 13,501 $ 14,176 $ 14,884 $ 15,629 $ 16,410 $ 17,231 $ 18,092 $ 18,997 $ 19,947 $ Maintenance 184,347 $ - $ 4,388$ 4,519 $ 4,655 $ 4,795 $ 4,939 $ 5,087 $ 5,239 $ 5,396 $ 5,558 $ 128,960$ Annual Costs 17,246 $ 18,020 $ 18,831 $ 19,679 $ 20,567 $ 21,497 $ 22,470 $ 23,489 $ 24,555 $ 148,906 $ Total Present Worth 780,151$ 390,035 $ 406,073 $ 421,883 $ 437,471 $ 452,840 $ 467,994 $ 482,938 $ 497,675 $ 512,209 $ 595,358 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 20,944 $ 21,991 $ 23,091 $ 24,245 $ 25,457 $ 26,730 $ 28,067 $ 29,470 $ 30,944 $ 32,491 $ Maintenance 5,897 $ 6,074 $ 6,256 $ 6,444 $ 6,637 $ 6,836 $ 7,041 $ 7,252 $ 7,470 $ 173,311$ Annual Costs 26,841 $ 28,065 $ 29,347 $ 30,689 $ 32,094 $ 33,566 $ 35,108 $ 36,722 $ 38,414 $ 205,802 $ Total Present Worth 609,497 $ 623,444 $ 637,203 $ 650,777 $ 664,168 $ 677,382 $ 690,420 $ 703,285 $ 715,981 $ 780,151 $ Year by Year Life Cycle Cost Table
Cost Category
20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
12,245$ 4,260$
05/13/2025 C9 368 of 1078
RBPS
Vaughan
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
65,033$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 65,033 $ 65,033 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 104,529 $ - $ 6,053$ 6,356 $ 6,673 $ 7,007 $ 7,357 $ 7,725 $ 8,112 $ 8,517 $ 8,943 $ 9,390 $ Maintenance 69,530 $ - $ 3,873$ 3,989 $ 4,109 $ 4,232 $ 4,359 $ 4,490 $ 4,624 $ 4,763 $ 4,906 $ 18,492 $ Annual Costs 9,926 $ 10,345 $ 10,782 $ 11,239 $ 11,716 $ 12,215 $ 12,736 $ 13,280 $ 13,849 $ 27,883 $ Total Present Worth 239,092$ 74,397 $ 83,604 $ 92,657 $ 101,559 $ 110,314 $ 118,926 $ 127,396 $ 135,728 $ 143,925 $ 159,495 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 9,860 $ 10,353 $ 10,870 $ 11,414 $ 11,985 $ 12,584 $ 13,213 $ 13,874 $ 14,567 $ 15,296 $ Maintenance 5,205 $ 5,361 $ 5,522 $ 5,687 $ 5,858 $ 6,034 $ 6,215 $ 6,401 $ 6,593 $ 24,852 $ Annual Costs 15,064 $ 15,714 $ 16,392 $ 17,101 $ 17,843 $ 18,617 $ 19,428 $ 20,275 $ 21,161 $ 40,148 $ Total Present Worth 167,430 $ 175,240 $ 182,925 $ 190,489 $ 197,934 $ 205,262 $ 212,477 $ 219,580 $ 226,574 $ 239,092 $ 5,765$ 3,760$
Cost Category
Year by Year Life Cycle Cost Table
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
20-Year Life-Cycle Cost Estimate
05/13/2025 C9 369 of 1078
RBPS
Flygt
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
71,514$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost 71,514 $ 71,514 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 83,623 $ - $ 4,842$ 5,085 $ 5,339 $ 5,606 $ 5,886 $ 6,180 $ 6,489 $ 6,814 $ 7,154 $ 7,512 $ Maintenance 22,634 $ - $ 906 $ 934 $ 962 $ 990 $ 5,657$ 1,051 $ 1,082 $ 1,115 $ 1,148 $ 5,820 $ Annual Costs 5,749 $ 6,018 $ 6,300 $ 6,596 $ 11,543 $ 7,231 $ 7,572 $ 7,929 $ 8,303 $ 13,332 $ Total Present Worth 177,771$ 76,938 $ 82,294 $ 87,584 $ 92,809 $ 101,434 $ 106,532 $ 111,567 $ 116,542 $ 121,456 $ 128,901 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy 7,888 $ 8,282 $ 8,696 $ 9,131 $ 9,588 $ 10,067 $ 10,570 $ 11,099 $ 11,654 $ 12,237 $ Maintenance 1,218 $ 1,255 $ 1,292 $ 1,331 $ 6,008 $ 1,412 $ 1,455 $ 1,498 $ 1,543 $ 6,226 $ Annual Costs 9,106 $ 9,537 $ 9,989 $ 10,462 $ 15,596 $ 11,479 $ 12,025 $ 12,597 $ 13,197 $ 18,463 $ Total Present Worth 133,698 $ 138,437 $ 143,120 $ 147,748 $ 154,255 $ 158,774 $ 163,240 $ 167,653 $ 172,015 $ 177,771 $ Cost Category
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
4,612$ 880$
Year by Year Life Cycle Cost Table
20-Year Life-Cycle Cost Estimate
05/13/2025 C9 370 of 1078
RBPS
No Action
Discount Rate 6%
Capital Inflation Rate (MR) 3%
Energy Inflation Rate 5%
Non-Energy Inflation Rate 3%
Capital Costs ($/year in
2021 dollars)
-$
Cost Category NPV Year Year Year Year Year Year Year Year Year Year Year 0123456789 1 0
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 366,785 $ - $ 25,189$ 25,944 $ 26,723 $ 27,524 $ 28,350 $ 29,201 $ 30,077 $ 30,979 $ 31,908 $ 32,865 $ Annual Costs 25,189 $ 25,944 $ 26,723 $ 27,524 $ 28,350 $ 29,201 $ 30,077 $ 30,979 $ 31,908 $ 32,865 $ Total Present Worth 366,785$ 23,763 $ 46,853 $ 69,290 $ 91,092 $ 112,277 $ 132,862 $ 152,865 $ 172,301 $ 191,188 $ 209,539 $ Year Year Year Year Year Year Year Year Year Year
11 12 13 14 15 16 17 18 19 20
Capital Cost - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Energy - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ Maintenance 33,851 $ 34,867 $ 35,913 $ 36,990 $ 38,100 $ 39,243 $ 40,420 $ 41,633 $ 42,882 $ 44,168 $ Annual Costs 33,851 $ 34,867 $ 35,913 $ 36,990 $ 38,100 $ 39,243 $ 40,420 $ 41,633 $ 42,882 $ 44,168 $ Total Present Worth 227,372 $ 244,700 $ 261,537 $ 277,898 $ 293,796 $ 309,244 $ 324,254 $ 338,840 $ 353,013 $ 366,785 $ 20-Year Life-Cycle Cost Estimate
Rates
Annual Energy Costs ($/year
in 2021 dollars)
Annual Maintenance Costs
($/year in 2021 dollars)
-$ 24,455$
Year by Year Life Cycle Cost Table
Cost Category
05/13/2025 C9 371 of 1078

BCPS RBPS

0.285$ $/KW-HR 0.353 $ $/KW-HR
8760 HR/yr 8760 HR/yr
BCPS
Anue Enviro-
Prep MicroBlock PHi Vapex Vaughan No Action Flygt
No. Units Operating 30 1 1 2 0 3
kW/Unit 5.0 0 11.19 3.96 11.1855 0 2.9828
Total kW 14.9 0 11.19 3.96 22.371 0 8.9484
Annual Energy Costs 18,617$ - $ 4,654$ 9,887 $ 18,617 $ - $ 11,170$ Typ. Annual Equipment and
Materials Maintenance Cost 1,000$ 3,900 $ 2,920 $ 2,500 $ 2,000 $ 1,440 $ - $ Typ. Annual Labor Maintenance
Cost 5,280$ 22,880 $ 880 $ 1,760 $ 3,520 $ 45,760 $ 880$ Total Typ. Annual Maintenance
Cost 6,280$ 26,780 $ 3,800 $ 4,260 $ 5,520 $ 47,200 $ 880$ RBPS
Anue Enviro-
Prep MicroBlock PHi Vapex Vaughan No Action Flygt
No. Units Operating 10 1 1 1 0 1
kW/Unit 5.6 0 5.59 3.96 5.59275 0 2.9828
Total kW 5.6 0 5.59 3.96 5.59275 0 2.9828
Annual Energy Costs 8,647$ - $ 2,882$ 12,245 $ 5,765 $ - $ 4,612$ Typ. Annual Equipment and
Materials Maintenance Cost 1,000$ 400 $ 2,920$ 2,500 $ 2,000 $ 1,575 $ - $ Typ. Annual Labor Maintenance
Cost 1,760$ 17,160 $ 880 $ 1,760 $ 1,760 $ 22,880 $ 880$ Total Typ. Annual Maintenance
Cost 2,760$ 17,560 $ 3,800 $ 4,260 $ 3,760 $ 24,455 $ 880 $ Energy and Maintenance Annual Cost
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7RWDO&,3&RVW      05/13/2025 C9 378 of 1078
05/13/2025 C9 379 of 1078
05/13/2025 C9 380 of 1078
City of Vista
Final Report

PUMP STATION REHABILITATION STUDY
05/13/2025 C9 381 of 1078
05/13/2025 C9 382 of 1078
PUMP STATION REHABILITATION STUDY| CITY OF VISTA
FINAL | AU
UST ͮͬͭͲ | i
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Contents
Chapter 1: Executive Summary
ͭ.ͭ Introduction ͭ-ͭ
ͭ.ͮ Pump Station Condition Assessment ͭ-ͭ
ͭ.ͯ CIP ProŒect Prioritiœed List ͭ-ͳ
ͭ.Ͱ CIP Consolidated ProŒects ͭ-͵
Chapter 2: Introduction and Background
ͮ.ͭ Back‰round ͮ-ͭ
ͮ.ͮ Pre˜ious Reports ͮ-ͮ
ͮ.ͯ Purpose ͮ-ͮ
ͮ.Ͱ Buena Vista Pump Station ͮ-ͯ
ͮ.Ͱ.ͭ Buena Vista Pump Station Hydraulic E˜aluation ͮ-Ͱ ͮ.ͱ Raceway Pump Station ͮ-ͳ
ͮ.ͱ.ͭ Raceway Pump Station Hydraulic E˜aluation ͮ-͵
ͮ.Ͳ Buena Creek Pump Station ͮ-ͭͭ
ͮ.Ͳ.ͭ Buena Creek Pump Station Hydraulic E˜aluation ͮ-ͭͯ ͮ.ͳ Cost Estimates ͮ-ͭͱ
ͮ.ͳ.ͭ Basis of Cost Estimates ͮ-ͭͱ
ͮ.ͳ.ͮ ProŒect Cost Factors ͮ-ͭͲ
Chapter 3: Facility Condition Assessment
ͯ.ͭ Introduction ͯ-ͭ
ͯ.ͮ MetŠodolo‰y ͯ-ͭ
ͯ.ͭ.ͭ Preparation ͯ-ͭ
ͯ.ͮ.ͭ Condition Assessments ͯ-ͮ
ͯ.ͯ Buena Vista Pump Station Condition Assessment Findin‰s ͯ-ͯ ͯ.ͯ.ͭ Sewa‰e
rinder and Barscreen ͯ-ͯ
ͯ.ͯ.ͮ Sewa‰e Pumps and Motors ͯ-Ͱ
ͯ.ͯ.ͯ Sur‰e Tanks ͯ-ͱ
ͯ.ͯ.Ͱ Val˜es ͯ-ͱ
05/13/2025 C9 383 of 1078
CITY OF VISTA | PUMP STATION REHABILITATION STUDY
ii | AU
UST ͮͬͭͲ | FINAL
ͯ.ͯ.ͱ Seal Water System ͯ-Ͳ
ͯ.ͯ.Ͳ Pota„le Water ͯ-Ͳ
ͯ.ͯ.ͳ Site Items ͯ-ͳ
ͯ.ͯ.ʹ Buildin‰ͯ -ͳ
ͯ.ͯ.͵ Wet Well ͯ-ʹ
ͯ.ͯ.ͭͬ Flow Meters and Meter Vaults ͯ-͵
ͯ.ͯ.ͭͭ Varia„le Fre“uency Dri˜es ͯ-͵
ͯ.ͯ.ͭͮ Control Centers and Panels ͯ-ͭͬ
ͯ.ͯ.ͭͯ Emer‰ency
enerators ͯ-ͭͬ
ͯ.ͯ.ͭͰ V Ƭ A En‰ineersǡ Inc. Condition Assessment ͯ-ͭͭ
ͯ.Ͱ Raceway Pump Station ͯ-ͭͯ
ͯ.Ͱ.ͭ Sewa‰e
rinder and Barscreen ͯ-ͭͯ
ͯ.Ͱ.ͮ Sewa‰e Pumps ͯ-ͭͯ
ͯ.Ͱ.ͯ Site Items ͯ-ͭͰ
ͯ.Ͱ.Ͱ Buildin‰ͯ -ͭͱ
ͯ.Ͱ.ͱ Emer‰ency O˜erflow Stora‰e Pond ͯ-ͭͱ
ͯ.Ͱ.Ͳ Odor Control Unit ͯ-ͭͲ
ͯ.Ͱ.ͳ Wet Well ͯ-ͭͲ
ͯ.Ͱ.ʹ Flow Meter and Meter Vault ͯ-ͭͳ
ͯ.Ͱ.͵ Varia„le Fre“uency Dri˜es ͯ-ͭͳ
ͯ.Ͱ.ͭͬ Control Centers and Panels ͯ-ͭͳ
ͯ.Ͱ.ͭͭ Emer‰ency
enerator ͯ-ͭʹ
ͯ.Ͱ.ͭͮ V Ƭ A En‰ineersǡ Inc. Condition Assessment ͯ-ͭʹ
ͯ.ͱ Buena Creek Pump Station Condition Assessment Findin‰s ͯ-ͭ͵ ͯ.ͱ.ͭ Sewa‰e
rinders ͯ-ͭ͵
ͯ.ͱ.ͮ Sewa‰e Pumps and Motors ͯ-ͮͬ
ͯ.ͱ.ͯ Sur‰e Tank ͯ-ͮͬ
ͯ.ͱ.Ͱ Pump Station Pipin‰ Ƭ Val˜es ͯ-ͮͮ
ͯ.ͱ.ͱ Site Items ͯ-ͮͯ
ͯ.ͱ.Ͳ Buildin‰ͯ -ͮͯ
ͯ.ͱ.ͳ Emer‰ency O˜erflow Stora‰e Basin ͯ-ͮͰ
ͯ.ͱ.ʹ Odor Control Bio-Filter Unit ͯ-ͮͱ
05/13/2025 C9 384 of 1078
PUMP STATION REHABILITATION STUDY | CITY OF VISTA
FINAL | AU
UST ͮͬͭͲ | iii
ͯ.ͱ.͵ Wet Well ͯ-ͮͱ
ͯ.ͱ.ͭͬ Flow Meters and
as Analyœer ͯ-ͮͲ
ͯ.ͱ.ͭͭ Varia„le Fre“uency Dri˜es ͯ-ͮͲ
ͯ.ͱ.ͭͮ Control Centers and Panels ͯ-ͮͲ
ͯ.ͱ.ͭͯ Crane ͯ-ͮͳ
ͯ.ͱ.ͭͰ Emer‰ency
enerator ͯ-ͮͳ
ͯ.ͱ.ͭͱ V Ƭ A En‰ineersǡ Inc. Condition Assessment ͯ-ͮͳ
ͯ.Ͳ Risk Assessment ͯ-ͮ͵
ͯ.Ͳ.ͭ Ori‰inal Useful Life ͯ-ͮ͵
ͯ.Ͳ.ͮ Remainin‰ and E˜aluated Remainin‰ Useful Life Estimates ͯ-ͯͬ ͯ.Ͳ.ͯ Vulnera„ility Assessment ͯ-ͯͬ
ͯ.Ͳ.Ͱ Criticality Assessment ͯ-ͯͬ
ͯ.Ͳ.ͱ Risk Assessment ͯ-ͯͭ
Chapter 4: Capital Improvement Projects
Ͱ.ͭ Studies and Assessments Ͱ-ͭ
Ͱ.ͭ.ͭ SCADA Communication Impro˜ement Study Ͱ-ͭ
Ͱ.ͭ.ͮ SCADA Master Plan Ͱ-ͭ
Ͱ.ͭ.ͯ Security Features Study Ͱ-ͮ
Ͱ.ͭ.Ͱ ATS and
enerator Testin‰ Impro˜ements Study Ͱ-ͮ
Ͱ.ͭ.ͱ Assessment of Ori‰inal Forcemain o˜er Creek Ͱ-ͯ
Ͱ.ͭ.Ͳ Pressure Sur‰e Analysis Ͱ-ͯ
Ͱ.ͭ.ͳ Recommended Study and Assessments Summary Ͱ-Ͱ
Ͱ.ͮ Buena Vista Pump Station Ͱ-Ͱ
Ͱ.ͮ.ͭ Buildin‰ Items and Site Work Ͱ-Ͱ
Ͱ.ͮ.ͮ VFD and PLC Replacement Ͱ-ͳ
Ͱ.ͮ.ͯ Pump ReŠa„ilitation Ͱ-ͳ
Ͱ.ͮ.Ͱ Forcemain Val˜e Replacement and Automation Ͱ-ͳ
Ͱ.ͮ.ͱ
rinder Impro˜ements Ͱ-ʹ
Ͱ.ͮ.Ͳ Backflow Pre˜enter Ͱ-ͭͮ
Ͱ.ͮ.ͳ Vapor PŠase Odor Control Ͱ-ͭͯ
Ͱ.ͮ.ʹ Wet Well ReŠa„ilitation Ͱ-ͭʹ
Ͱ.ͮ.͵ Le˜el Monitorin‰ System Up‰rade Ͱ-ͭʹ
05/13/2025 C9 385 of 1078
CITY OF VISTA | PUMP STATION REHABILITATION STUDY
i˜ | AU
UST ͮͬͭͲ | FINAL
Ͱ.ͮ.ͭͬ EšŠaust Fan Replacement Ͱ-ͭ͵
Ͱ.ͮ.ͭͭ Assets Nearin‰ End of Useful Life Ͱ-ͭ͵
Ͱ.ͮ.ͭͮ V Ƭ A Recommendations Ͱ-ͮͭ
Ͱ.ͮ.ͭͯ Buena Vista Pump Station CIP Summary Ͱ-ͮͯ
Ͱ.ͯ Raceway Pump Station Ͱ-ͮͰ
Ͱ.ͯ.ͭ Buildin‰ and Site Items Ͱ-ͮͰ
Ͱ.ͯ.ͮ Sewa‰e
rinder Impro˜ements Ͱ-ͮͱ
Ͱ.ͯ.ͯ PLC Replacement Ͱ-ͮͲ
Ͱ.ͯ.Ͱ Emer‰ency O˜erflow Stora‰e Pond Ͱ-ͮͲ
Ͱ.ͯ.ͱ Odor Control Unit Ͱ-ͮͳ
Ͱ.ͯ.Ͳ Replace Plu‰ at RPS/Carls„ad Interconnect Ͱ-ͮʹ
Ͱ.ͯ.ͳ Wet Well Scum Pre˜ention Ͱ-ͮʹ
Ͱ.ͯ.ʹ EšŠaust Fan Replacement Ͱ-ͮ͵
Ͱ.ͯ.͵ Pressure Sur‰e Impro˜ements Ͱ-ͮ͵
Ͱ.ͯ.ͭͬ Assets Nearin‰ End of Useful Life Ͱ-ͯͬ
Ͱ.ͯ.ͭͭ V Ƭ A Recommendations Ͱ-ͯͭ
Ͱ.ͯ.ͭͮ Raceway Pump Station CIP Summary Ͱ-ͯͮ
Ͱ.Ͱ Buena Creek Pump Station Ͱ-ͯͯ
Ͱ.Ͱ.ͭ Buildin‰ Items and Site Work Ͱ-ͯͯ
Ͱ.Ͱ.ͮ VFD and PLC Replacement Ͱ-ͯͰ
Ͱ.Ͱ.ͯ Redundant Forcemain Ͱ-ͯͱ
Ͱ.Ͱ.Ͱ Val˜e Replacement Ͱ-Ͱͯ
Ͱ.Ͱ.ͱ Wet Well Liner Replacement and Sluice
ate Repair Ͱ-ͰͰ
Ͱ.Ͱ.Ͳ Odor Control Ͱ-Ͱͱ
Ͱ.Ͱ.ͳ Wet Well Scum Pre˜ention Ͱ-ͰͲ
Ͱ.Ͱ.ʹ Automation of Gates Ͱ-ͰͲ
Ͱ.Ͱ.͵ EšŠaust Fan Replacement Ͱ-Ͱͳ
Ͱ.Ͱ.ͭͬ Pump Selection Pro‰rammin‰Ͱ -Ͱͳ
Ͱ.Ͱ.ͭͭ Pressure Sur‰e Impro˜ements Ͱ-Ͱʹ
Ͱ.Ͱ.ͭͮ Assets Nearin‰ End of Useful Life Ͱ-Ͱ͵
Ͱ.Ͱ.ͭͯ V Ƭ A Recommendations Ͱ-ͱͭ
Ͱ.Ͱ.ͭͰ Buena Creek Pump Station CIP Summary Ͱ-ͱͯ
05/13/2025 C9 386 of 1078
PUMP STATION REHABILITATION STUDY | CITY OF VISTA
FINAL | AUGUST ͮͬͭͲ | ˜
Chapter 5: Project PHasing
ͱ.ͭ Introduction ͱ-ͭ
ͱ.ͮ CIP ProŒect Rankin‰ͱ -ͭ
ͱ.ͯ CIP Consolidated ProŒects ͱ-͵
ͱ.Ͱ Implementation ScŠedule ͱ-͵
ͱ.ͱ Business Case E˜aluation ͱ-ͭͬ
ͱ.ͱ.ͭ Grinder Replacement at Buena Vista Pump Station ͱ-ͭͬ ͱ.ͱ.ͮ Consolidated ReŠa„ilitation Items ͱ-ͭͮ
ͱ.ͱ.ͯ Redundant Forcemain at Buena Creek Pump Station ͱ-ͭͯ ͱ.ͱ.Ͱ Vapor PŠase Odor Control at Buena Vista Pump Station ͱ-ͭͱ Appendices
Appendiš A CIP Prioriti œation Comparison Ta„les
Appendiš B Buena Vista Pump Station: Condition Assessment Forms Appendiš C Raceway Pump Station: Condition Assessment Forms Appendiš D Buena Creek Pump Station: Condition Assessment Forms Appendiš EV ƬA Consultin‰ En‰ineers Pump station Condition Assessments Draft Report Appendiš F Flow Science Incorporated: Buena Creek Lift Station and Force Main Potential P r e s s u r e S u r ‰e Issues and Miti‰ation Alternati˜es TecŠnical Memo Appendiš G Buena Vista Pump Station: Cost Estimate Worksheets Appendiš H Raceway Pump Station: Cost Estimate Worksheets Appendiš I Buena Creek Pump Station: Cost Estimate Worksheets Appendiš
Raceway Pump Station: Grinder In˜esti‰ation Letter Report Appendiš  Raceway Pump Station: Dera‰‰er II Technical Memo Appendiš L Buena Creek Pump Station: Redundant Forcemain Non-Cost E ˜aluation 05/13/2025 C9 387 of 1078
CITY OF VISTA | PUMP STATION REHABILITATION STUDY
˜i | AUGUST ͮͬͭͲ | FINAL
Tables
Ta„le ͭ.ͭ Study and Assessments CIP Summary ͭ-ͮ
Ta„le ͭ.ͮ Buena Vista Pump Station CIP Summary ͭ-ͮ
Ta„le ͭ.ͯ Raceway Pump Station CIP Summary ͭ-ͱ
Ta„le ͭ.Ͱ Buena Creek Pump Station CIP Summary ͭ-Ͳ
Ta„le ͭ.ͱ Prioritiœed ProŒect List ͭ-ʹ
Ta„le ͭ.Ͳ Consolidated ProŒects ͭ-ͭͬ
Ta„le ͮ.ͭ Ešistin‰ and Future Flow Rates ͮ-ͮ
Ta„le ͮ.ͮ Buena Vista Pump Station Desi‰n Criteria ͮ-ͯ Ta„le ͮ.ͯ BVPS: Velocity in Forcemains ͮ-ͳ
Ta„le ͮ.Ͱ Raceway Pump Station Desi‰n Criteria ͮ-ͳ
Ta„le ͮ.ͱ RPS: Velocity throu‰h Forcemain ͮ-ͭͭ
Ta„le ͮ.Ͳ Buena Creek Pump Station Desi‰n Criteria ͮ-ͭͭ Ta„le ͮ.ͳ BCPS: Velocity throu‰h Forcemain ͮ-ͭͱ
Ta„le ͮ.ʹ ProŒect Cost Factors ͮ-ͭͲ
Ta„le ͯ.ͭ City of Vista and Encina Water Authority Staff ͯ-ͭ Ta„le ͯ.ͮ Carollo Condition Assessment Team Mem„ers ͯ-ͮ Ta„le ͯ.ͯ Asset Condition Rankin‰ Scale ͯ-ͮ
Ta„le ͯ.Ͱ Ori‰inal Useful Life ͯ-ͮ͵
Ta„le ͯ.ͱ Condition Fractions ͯ-ͯͬ
Ta„le ͯ.Ͳ Criticality Matri šͯ -ͯͭ
Ta„le ͯ.ͳ Buena Vista Pump Station Priority Assets to Consider for Replacement or Reha„ilitation ͯ-ͯͮ
Ta„le ͯ.ʹ Raceway Pump Station Priority Assets to Consider for Replacement or Reha„ilitation ͯ-ͯͯ
Ta„le ͯ.͵ Buena Creek Pump Station Priority Assets to Consider for Replacement or Reha„ilitation ͯ-ͯͰ
Ta„le Ͱ.ͭ SCADA Communication Impro˜ement Study Cost Estimate Ͱ-ͮ Ta„le Ͱ.ͮ Security Features Study Cost Estimate Ͱ-ͮ
Ta„le Ͱ.ͯ ATS and Generator Testin‰ Study Cost Estimate Ͱ-ͯ Ta„le Ͱ.Ͱ Forcemain Creek Section Assessment Cost Estimate Ͱ-ͯ Ta„le Ͱ.ͱ Pressure Sur ‰e Analysis Cost Estimate Ͱ-Ͱ
Ta„le Ͱ.Ͳ Recommended Study and Assessments CIP Summary Ͱ-Ͱ 05/13/2025 C9 388 of 1078
PUMP STATION REHABILITATION STUDY | CITY OF VISTA
FINAL | AUGUST ͮͬͭͲ | ˜ii
Ta„le Ͱ.ͳ Buildin‰ Items and Site Work Cost Estimate Ͱ-Ͳ Ta„le Ͱ.ʹ VFD and PLC Cost Estimate Ͱ-ͳ
Ta„le Ͱ.͵ Pump Reha„ilitation Cost Estimate Ͱ-ͳ
Ta„le Ͱ.ͭͬ Forcemain Plu‰ Val˜e Replacement Cost Estimate Ͱ-ʹ Ta„le Ͱ.ͭͭ Option ͭ - Grinder Impro˜ements Cost Estimate Ͱ-ͭͮ Ta„le Ͱ.ͭͮ Option Ͳ - Shelf-spare Communitor Cost Estimate Ͱ-ͭͮ Ta„le Ͱ.ͭͯ Backflow Pre˜enter Cost Estimate Ͱ-ͭͯ
Ta„le Ͱ.ͭͰ Desi‰n Criteria for Biolo‰ical ή Car„on Two-Sta‰e Scru„„er Ͱ-ͭͰ Ta„le Ͱ.ͭͱ Desi‰n Criteria for Biolo‰ical Two-Sta‰e Scru„„er Ͱ-ͭͱ Ta„le Ͱ.ͭͲ Installation Cost Comparison Ͱ-ͭͲ
Ta„le Ͱ.ͭͳ Estimated Annual Operations & Maintenance Costs Ͱ-ͭͳ Ta„le Ͱ.ͭʹ Odor Control Unit Cost Estimate Ͱ-ͭͳ
Ta„le Ͱ.ͭ͵ Wet Well Reha„ilitation Cost Estimate Ͱ-ͭʹ
Ta„le Ͱ.ͮͬ Le˜el Monitorin‰ System Cost Estimate Ͱ-ͭ͵
Ta„le Ͱ.ͮͭ Ešhaust Fan Replacement Cost Estimate Ͱ-ͭ͵
Ta„le Ͱ.ͮͮ Assets Nearin‰ End of Useful Life Cost Estimate Ͱ-ͮͬ Ta„le Ͱ.ͮͯ V & A Buena Vista ProŒect Cost Estimate Ͱ-ͮͯ Ta„le Ͱ.ͮͰ Buena Vista Pump Station CIP Summary Ͱ-ͮͯ
Ta„le Ͱ.ͮͱ Buildin‰ and Site Item Cost Estimate Ͱ-ͮͱ
Ta„le Ͱ.ͮͲ Sewa‰e Grinder Impro˜ement Ͱ-ͮͱ
Ta„le Ͱ.ͮͳ PLC Replacement Cost Estimate Ͱ-ͮͲ
Ta„le Ͱ.ͮʹ O˜erflow Stora‰e Pond Reha„ilitation Cost Estimate Ͱ-ͮͳ Ta„le Ͱ.ͮ͵ Odor Control Unit Replacement Cost Estimate Ͱ-ͮͳ Ta„le Ͱ.ͯͬ Interconnect Plu‰ Replacement Cost Estimate Ͱ-ͮʹ Ta„le Ͱ.ͯͭ Wet Well Sprayer Cost Estimate Ͱ-ͮ͵
Ta„le Ͱ.ͯͮ Ešhaust Fan Replacement Cost Estimate Ͱ-ͮ͵
Ta„le Ͱ.ͯͯ Pressure Sur‰e Impro˜ements Cost Estimate Ͱ-ͯͬ Ta„le Ͱ.ͯͰ Assets Nearin‰ End of Useful Life Cost Estimate Ͱ-ͯͭ Ta„le Ͱ.ͯͱ V & A Raceway ProŒect Cost Estimate Ͱ-ͯͮ
Ta„le Ͱ.ͯͲ Raceway Pump Station CIP Summary Ͱ-ͯͮ
Ta„le Ͱ.ͯͳ Buildin‰ and Site Work Cost Estimate Ͱ-ͯͰ
Ta„le Ͱ.ͯʹ VFD and PLC Replacement Cost Estimate Ͱ-ͯͰ
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Ta„le Ͱ.ͯ͵ Non-cost E˜aluation Criteria Rankin‰Ͱ -ͯͳ
Ta„le Ͱ.Ͱͬ Non-Cost E˜aluation Final Scores Ͱ-Ͱͮ
Ta„le Ͱ.Ͱͭ Redundant Forcemain Cost Estimate Ͱ-Ͱͯ
Ta„le Ͱ.Ͱͮ Val˜e Replacement Cost Estimate Ͱ-ͰͰ
Ta„le Ͱ.Ͱͯ Wet Well Liner and Sluice Gate Construction Cost Estimate Ͱ-ͰͰ Ta„le Ͱ.ͰͰ Odor Control Unit Reha „ilitation Cost Estimate Ͱ-ͰͲ Ta„le Ͱ.Ͱͱ Wet Well Sprayer Cost Estimate Ͱ-ͰͲ
Ta„le Ͱ.ͰͲ Automation of Gates Cost Estimate Ͱ-Ͱͳ
Ta„le Ͱ.Ͱͳ Ešhaust Fan Replacement Cost Estimate Ͱ-Ͱͳ
Ta„le Ͱ.Ͱʹ Pump Selection Pro‰rammin‰ Cost Estimate Ͱ-Ͱʹ Ta„le Ͱ.Ͱ͵ Pressure Sur ‰e Impro˜ements Cost Estimate Ͱ-Ͱ͵ Ta„le Ͱ.ͱͬ BCPS: Flow Conditions Ͱ-ͱͬ
Ta„le Ͱ.ͱͭ BCPS: Pump Confi‰uration Ͱ-ͱͬ
Ta„le Ͱ.ͱͮ Assets Nearin‰ End of Useful Life Cost Estimate Ͱ-ͱͭ Ta„le Ͱ.ͱͯ V & A Buena Creek ProŒect Cost Estimate Ͱ-ͱͯ Ta„le Ͱ.ͱͰ Buena Creek Pump Station CIP Summary Ͱ-ͱͯ
Ta„le ͱ.ͭ Study and Assessments CIP Summary ͱ-ͭ
Ta„le ͱ.ͮ Buena Vista Pump Station CIP Summary ͱ-ͮ
Ta„le ͱ.ͯ Raceway Pump Station CIP Summary ͱ-Ͱ
Ta„le ͱ.Ͱ Buena Creek Pump Station CIP Summary ͱ-ͱ
Ta„le ͱ.ͱ Wei‰htin‰ of Cate‰ories for Prioritiœation of CIP ͱ-ͳ Ta„le ͱ.Ͳ Prioritiœed ProŒect List ͱ-ͳ
Ta„le ͱ.ͳ Consolidated ProŒects ͱ-͵
Ta„le ͱ.ʹ Consolidated ProŒect Components ͱ-ͭͮ
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Figures
Fi‰ure ͮ.ͭ City of Vista Pump Station Vicinity Map ͮ-ͭ
Fi‰ure ͮ.ͮ Buena Vista Pump Station Site Plan ͮ-Ͱ
Fi‰ure ͮ.ͯ BVPS: A˜era‰e Daily Flows „y Month ͮ-ͱ
Fi‰ure ͮ.Ͱ BVPS: Hourly Flows „y Month ͮ-ͱ
Fi‰ure ͮ.ͱ BVPS: ͮͬͭͬ A˜era‰e Flow „y Month ͮ-Ͳ
Fi‰ure ͮ.Ͳ BVPS: Forcemain System and Pump Cur˜es ͮ-Ͳ
Fi‰ure ͮ.ͳ Raceway Pump Station Site Plan ͮ-ʹ
Fi‰ure ͮ.ʹ RPS: A˜era‰e Daily Flow „y Month ͮ-͵
Fi‰ure ͮ.͵ RPS: Hourly Flow „y Month ͮ-͵
Fi‰ure ͮ.ͭͬ RPS: ͮͬͭͬ A˜era‰e Flow „y Month ͮ-ͭͬ
Fi‰ure ͮ.ͭͭ RPS: Forcemain System and Pump Cur˜es ͮ-ͭͬ Fi‰ure ͮ.ͭͮ Buena Creek Pump Station Site Plan ͮ-ͭͮ
Fi‰ure ͮ.ͭͯ BCPS: A˜era‰e Daily Flow „y Month ͮ-ͭͯ
Fi‰ure ͮ.ͭͰ BCPS: Hourly Flow „y Month ͮ-ͭͰ
Fi‰ure ͮ.ͭͱ BCPS: ͮͬͭͬ A˜era‰e Flow „y Month ͮ-ͭͰ
Fi‰ure ͮ.ͭͲ BCPS: Forcemain System and Pump Cur˜es ͮ-ͭͱ Fi‰ure ͯ.ͭ Communitor and Barscreen ͯ-ͯ
Fi‰ure ͯ.ͮ Sewa‰e Pump Motor No. ͮͯ -Ͱ
Fi‰ure ͯ.ͯ Sur‰e Tanks ͯ-ͱ
Fi‰ure ͯ.Ͱ Check Val˜e at Pump No. ͭͯ -Ͳ
Fi‰ure ͯ.ͱ Seal Water Components ͯ-Ͳ
Fi‰ure ͯ.Ͳ Hydropneumatic Tank ͯ-Ͳ
Fi‰ure ͯ.ͳ Chain Link Fence ͯ-ͳ
Fi‰ure ͯ.ʹ Flood Containment Door ͯ-ʹ
Fi‰ure ͯ.͵ Wet Well ͯ-͵
Fi‰ure ͯ.ͭͬ Flow Meter and Vault ͯ-͵
Fi‰ure ͯ.ͭͭ Generator No. ͮͯ -ͭͬ
Fi‰ure ͯ.ͭͮ Grinder and Barscreen Channel ͯ-ͭͯ
Fi‰ure ͯ.ͭͯ Dischar‰e Val˜e Pump No. ͯͯ -ͭͰ
Fi‰ure ͯ.ͭͰ Fence ͯ-ͭͰ
Fi‰ure ͯ.ͭͱ Pressure Transmitter Gau‰e ͯ-ͭͰ
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Fi‰ure ͯ.ͭͲ Lou˜ered Doors and Buildin‰ͯ -ͭͱ
Fi‰ure ͯ.ͭͳ O˜erflow Stora‰e Pond ͯ-ͭͱ
Fi‰ure ͯ.ͭʹ Odor Control Unit ͯ-ͭͲ
Fi‰ure ͯ.ͭ͵ Wet Well ͯ-ͭͲ
Fi‰ure ͯ.ͮͬ Sluice Gates ͯ-ͭͲ
Fi‰ure ͯ.ͮͭ Flow Meter and Vault ͯ-ͭͳ
Fi‰ure ͯ.ͮͮ Motor Control Center ͯ-ͭͳ
Fi‰ure ͯ.ͮͯ Pro‰ramma„le Lo‰ic Control ͯ-ͭʹ
Fi‰ure ͯ.ͮͰ Emer‰ency Generator ͯ-ͭʹ
Fi‰ure ͯ.ͮͱ Channel Monster Sewa‰e Grinders ͯ-ͭ͵
Fi‰ure ͯ.ͮͲ Sewa‰e Pumps and Motors ͯ-ͮͬ
Fi‰ure ͯ.ͮͳ Sur‰e Tank ͯ-ͮͬ
Fi‰ure ͯ.ͮʹ Motor Operated Val˜e ͯ-ͮͮ
Fi‰ure ͯ.ͮ͵ Check Val˜e ͯ-ͮͮ
Fi‰ure ͯ.ͯͬ Fence and Asphalt ͯ-ͮͯ
Fi‰ure ͯ.ͯͭ GE Ca„inet Lacks Access ͯ-ͮͯ
Fi‰ure ͯ.ͯͮ Leak Visi„le on Concrete Wall ͯ-ͮͰ
Fi‰ure ͯ.ͯͯ Emer‰ency Stora‰e Vault ͯ-ͮͰ
Fi‰ure ͯ.ͯͰ Odor Control Unit ͯ-ͮͱ
Fi‰ure ͯ.ͯͱ Wet Well ͯ-ͮͱ
Fi‰ure ͯ.ͯͲ Encina Forcemain ͭͰdz Flow Meter ͯ-ͮͲ
Fi‰ure ͯ.ͯͳ Gas Analyœer ͯ-ͮͲ
Fi‰ure ͯ.ͯʹ Pro‰ramma„le Lo‰ic Controller ͯ-ͮͲ
Fi‰ure ͯ.ͯ͵ Motor Control Center ͯ-ͮͲ
Fi‰ure ͯ.Ͱͬ Emer‰ency Generator ͯ-ͮͳ
Fi‰ure Ͱ.ͭ Ešistin‰ Sur‰e Tank Access Ͱ-ͱ
Fi‰ure Ͱ.ͮ Grinder Vaultǡ Aerial View Ͱ-ͭͬ
Fi‰ure Ͱ.ͯ BVPS Grinder Vault Plan View Ͱ-ͭͭ
Fi‰ure Ͱ.Ͱ Grinder Vaultǡ Section View Ͱ-ͭͭ
Fi‰ure Ͱ.ͱ Odalo‰ Sensor Data Ͱ-ͭͯ
Fi‰ure Ͱ.Ͳ Alternati˜e ͭ: BioήCar„on Scru„„er Ͱ-ͭͰ
Fi‰ure Ͱ.ͳ Alternati˜e ͮ: Two-sta‰e ȋ„oth Biolo‰icalȌ Scru„„er Ͱ-ͭͱ 05/13/2025 C9 392 of 1078
PUMP STATION REHABILITATION STUDY | CITY OF VISTA
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Fi‰ure Ͱ.ʹ Corroded Li‰ht Fišture Ͱ-ͮͰ
Fi‰ure Ͱ.͵ Ešistin‰ Ešcess Effluent Ali‰nment System and Pump Cur˜es Ͱ-ͯͱ Fi‰ure Ͱ.ͭͬ Ešistin‰ Pipelines Ͱ-ͯͲ
Fi‰ure Ͱ.ͭͭ Alternati˜e ͭ - South Melrose/Faraday/Orion Route Ͱ-ͯʹ Fi‰ure Ͱ.ͭͮ Alternati˜e ͮ - South Melrose/Faraday/Canyon Route Ͱ-ͯ͵ Fi‰ure Ͱ.ͭͯ Alternati˜e ͮ - South Melrose/Faraday/Canyon Route Ͱ-Ͱͬ Fi‰ure Ͱ.ͭͰ Alternati˜e Ͱ - South Melrose/Faraday/El Fuerte/Palomar Airport Road Route Ͱ-Ͱͭ Fi‰ure Ͱ.ͭͱ Alternati˜e ͱ - Ešcess Effluent Ali‰nment Route Ͱ-Ͱͮ Fi‰ure Ͱ.ͭͲ Odalo‰ Sensor Data Ͱ-Ͱͱ
Fi‰ure Ͱ.ͭͳ Odor Control Unit with Corrosion Ͱ-Ͱͱ
Fi‰ure Ͱ.ͭʹ Slide Gates to „e Automated in Wet Well Ͱ-ͰͲ Fi‰ure ͱ.ͭ Communitor and Barscreen ͱ-ͭͬ
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Abbreviations
AACE American Association of Cost En ‰ineers
AHPS A ‰ua Hedionda Pump Station
APCD Air Pollution Control District
ASCE American Society of Ci ˜il En‰ineers
ATS Auto Transfer Switches
AWWA American Water Works Association
BCPS Buena Creek Pump Station
BSD Buena Sanitation District
BVPS Buena Vista Pump Station
CCI Construction Cost Inde š
CCTV closed-circuit tele ˜ision
CIP Capital Impro ˜ement Pro‰ram
City City of Vista
ea each
ENR En ‰ineerin‰ News Record
EPA En ˜ironmental Protection A‰ency
E˜RUL e ˜aluated remainin‰ useful life
EWA Encina Water Authority
EWPCF Encina Water Pollution Control Facility
fps force per second
FRP fi „er-reinforced plastic
ft foot ȋfeetȌ
‰pm ‰allons per minute
hp horse power
IIMM International Infrastructure Mana ‰ement Manual
kW kilowatt
MCCs Motor Control Centers
m‰d million ‰allons per day
O&M operations and maintenance
OUL Ori ‰inal Useful Life
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PLC pro ‰ramma„le lo‰ic controller
R-CAMP® Remote Facilities Comprehensi ˜e Asset Mana‰ement Plan RMC RMC Water and En ˜ironment
RPS Raceway Pump Station
RUL Remainin ‰ Useful Life
SWRF Shadowrid ‰e Water Reclamation Facility
UPS uninterrupti „le power supply
VFD ˜aria„le fre“uency dri˜e
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PUMP STATION REHABILITATION STUDY | CHAPTER 1 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͭ-ͭ
Chapter 1

EXECUTIVE SUMMARY

1.1 Introduction
The purpose of this Pump Station Condition Assessment and Reha„ilitation Report is to ‰i˜e the City of Vista ȋCityȌ a plannin‰ document that identifies and prioritiœes potential impro˜ements to three of the four pump stations con˜eyin‰ flow from the City to the Encina Wastewater Authority̹s ȋEWAȌ Water Pollution Control Facility ȋEWPCFȌ in Carls„ad. These pump stations are the Buena Vista Pump Station ȋBVPSȌǡ the Raceway Pump Station ȋRPSȌǡ and the Buena Creek Pump Station ȋBCPSȌ. EWA operates and maintains the pump stations for the ownersǡ which are the City of Vistaǡ the City of Carls„adǡ and the Buena Sanitation District ȋBSDȌ.

For this preliminary desi‰n reportǡ proŒects were identified „ased on a comprehensi˜e condition assessment of the installed assetsǡ inter˜iews with City and EWA staff a„out known deficienciesǡ and a re˜iew of the o˜erall pump station operation and relia„ility under current and future conditions. The recommended proŒects were re˜iewed for cost and were prioritiœed accordin‰ to the City's ‰oals and standards.

1.2 Pump Station Condition Assessment
O˜er three daysǡ a multi-discipline team of mechanicalǡ structuralǡ and electrical en‰ineersǡ assisted „y EWA staffǡ conducted condition assessments of each pump station. The assessments in˜ol˜ed ˜isually inspectin‰ the installed assets and known deficiencies identified „y staff. After each assessment was completedǡ a meetin‰ was held to discuss the operations and maintenance history and needed impro˜ements with the City and EWA.

For each pump stationǡ an asset in˜entory list was created to document the assets at each pump station. Throu‰hout the condition assessmentsǡ and per a re˜iew of record drawin‰sǡ this list was updated with new assets.

The asset list was used to track asset conditionǡ condition rankin‰sǡ remainin‰ useful life estimatesǡ criticalityǡ ˜ulnera„ilityǡ and o˜erall risk. Risk scores are calculated as the product of criticality and ˜ulnera„ilityǡ where ˜ulnera„ility is the likelihood of failureǡ and criticality is the conse“uence of failure. Vulnera„ility is a function of the asset condition and remainin‰ useful lifeǡ whereas criticality is a wei‰hted scoreǡ with each asset ‰raded accordin‰ to health and safetyǡ economicsǡ en˜ironmentalǡ and community effects.

From the listǡ hi‰h-risk assets were identified for reha„ or replacement and were ‰rouped into lar‰er Capital Impro˜ement Pro‰ram ȋCIPȌ proŒects for additional e˜aluation and proŒect cost estimatin‰. Ta„les ͭ.ͭ throu‰h ͭ.Ͱ pro˜ide a list of CIP proŒectsǡ or‰aniœed „y pump stationǡ with studies and assessments ‰rouped to‰ether. The ta„les include proŒect scopeǡ maŒor dri˜ersǡ and the estimated proŒect cost.
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Ta„le ͭ.ͭ Study and Assessments CIP Summary
ProŒect
No. ProŒect ProŒect Components Dri˜er Cost
ͭ
SCADA
Communication
Impro˜ements Study
x Perform master
plannin‰ study
x BVPSǡ RPSǡ and BCPS
x Condition
x Risk
x Operations
Impro˜ement
͈ͳͱǡͬͬͬ
ͮ Security Features
Study
x Perform master
plannin‰ study
x BVPSǡ RPSǡ and BCPS
x Add allowance for
Impro˜ements
x Site Impro˜ements
x Safety
x Community
x Risk
͈ͯͱͬǡͬͬͬ
ͯ
ATS and Generator
Testin‰ Impro˜ements
Study
x Master plannin‰ study
x BVPS and RPS
x Testin‰
Impro˜ement ͈Ͳͬǡͬͬͬ
Ͱ
BVPS Assessment of
Ori‰inal Forcemain
o˜er Creek
x Assess forcemain
se‰ment
x Identify reha„ilitation
needs
x Condition
͈ͱͬǡͬͬͬ
ͱ Pressure Sur‰e
Analysis
x Complete pressure
sur‰e analysis for BCPS
and RPS
x Recommend miti‰ation
measures for each site
x Risk
͈ͮͬǡͬͬͬ
Total Estimated Costs ͈ͱͱͱǡͬͬͬ
Ta„le ͭ.ͮ Buena Vista Pump Station CIP Summary
ProŒect
No. ProŒect ProŒect Components Dri˜er Cost
Ͳ Buildin‰ and Site Items
x Replace flood containment door
x Replace wet well li‰htin‰
x Demo seal water system
x Demo and replace tile roof
x Install mem„rane on „arrel roof
x Replace ešterior floodli‰hts
x Make initial repairs and apply
paint/coatin‰
x Replace ser˜ice entrance switch‰ear
x Replace fence with ʹ' candy cane-style
security fence Meter ˜ault crack
inŒection
x Perform meter ˜ault infiltration
remediation
x Asphalt o˜erly
x Sur‰e tank access platform
x Condition
x Safety
x Risk
͈ͳͱͯǡͬͬͬ
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Ta„le ͭ.ͮ Buena Vista Pump Station CIP Summary ȋCont.Ȍ ProŒect
No. ProŒect ProŒect Components Dri˜er Cost
ͳ VFD and PLC
Replacement
x Replace PLC
x Replace VFD's for Pump
Nos. ͭǡ ͮǡ Ͱǡ and ͱ
x Condition
x Risk ͈ͭǡͭͮͮǡͬͬͬ*
ʹ Pump Reha„ilitation
x Re„uild Pump Nos. Ͱ and
ͱ
x Condition
x Risk ͈ͱͬǡͬͬͬ
͵
Forcemain Plu‰ Val˜e
Replacement and
Automation
x Replace all forcemain plu‰
˜al˜es ȋei‰ht ͭͰ̺ suction
and dischar‰e ˜al˜esǡ
three ̺ͮͬ header ˜al˜esǡ
three ͮͰ̺ „uried ˜al˜esȌ
x Automate three ͮͰ̺
„uried forcemain plu‰
˜al˜es and ̺ͮͬ plu‰ ˜al˜e
of forcemain B header
x Condition
x Risk
͈ͮͰͮǡͬͬͬ
ͭͬ Grinder Impro˜ements
- Option ͭ
x Construct new concrete
‰rinder ˜ault with
aluminum hatchesǡ access
stairsǡ slide ‰atesǡ FRP
‰ratin‰
x Dual channel ‰rindersǡ
each capa„le of handlin‰
desi‰n flow
x Bypass pumpin‰
x Condition
x Risk
x Operations
Impro˜ements
x Reduced La„or ͈ͮǡͯͭͮǡͬͬͬ
ͭͭ Grinder Impro˜ements
- Option Ͳ
x O„tain shelf-spare
communitor for „ackup
x Condition
x Risk
x Operations
Impro˜ements
͈ͱͭǡͬͬͬ
ͭͮ Backflow Pre˜enter
x Demo hydropneumatic
tank system
x Install „ackflow pre˜enter
x Reduced La„or
x Condition ͈ͳͬǡͬͬͬ
ͭͯ Vapor Phase Odor
Control
x Install two-sta‰e
„iolo‰ical scru„„er
contained in a sin‰le
tower
x Installation of new
receptor
͈ͱͰͱǡͬͬͬ
ͭͰ Wet Well
Reha„ilitation
x Surface preparation and
concrete repair in wet well
x Install new coatin‰
x Bypass pumpin‰
x Condition
x Risk ͈͵ͬͭǡͬͬͬ
* ProŒect is scheduled for completion in ͚͙͘͞. Cost Estimate is not included in the pump station Total Estimated Cost. Cost is Total Estimated Construction Cost and does not include en‰ineerin‰ desi‰n costs. Desi‰n cost estimates are pro˜ided separately as the desi‰n work and CIP identification were completed concurrently. 05/13/2025 C9 399 of 1078
CITY OF VISTA | CHAPTER 1 | PUMP STATION REHABILITATION STUDY ͭ-Ͱ | AUGUST ͮͬͭͲ | FINAL
Ta„le ͭ.ͮ Buena Vista Pump Station CIP Summary ȋCont.Ȍ ProŒect
No. ProŒect ProŒect Components Dri˜er Cost
ͭͱ Le˜el Monitorin‰
System Up‰rade
x Demo ešistin‰ „u„„ler
system
x Install pressure transducer
le˜el monitorin‰ system
x Process
Impro˜ements
x Risk
͈ͮ͵ǡͬͬͬ
ͭͲ Ešhaust Fan
Replacement
x Install wall-mounted
centrifu‰al ešhaust fanǡ
rated ͯͲͬͬ CFMǡ with
thermostat and ͭ hp fan
motor in electrical room
x Install roof-mounted
centrifu‰al supply fan
rated ͯͲͬͬ CFMǡ with ͭ hp
fan motor in electrical
room
x Ener‰y efficiency
x Impro˜ed work
en˜ironment
͈ͮ͵ǡͬͬͬ
ͭͳ Assets Nearin‰ End of
Useful Life
x Replace flow meters A
and B
x Replace flow transmitters
A and B
x Replace ‰as analyœer
x Replace dry-pit sewa‰e
pumps ͭǡ ͮǡ Ͱǡ and ͱ
x Condition
͈ͳͭ͵ǡͬͬͬ
ͭʹ V & A
Recommendations
x Replace corroded header
spool
x Repair ‰rout pads under
pump „ases
x Replace corroded
components in meter
˜aults
x Coat meter ˜ault
e“uipment/pipin‰ with
material suita„le for
marine en˜ironment
x Repair drain pipin‰ and
ductin‰ in „athrooms
x Condition
͈Ͱʹǡͬͬͬ
Total Estimated Costs ͈ͱǡͳͰ͵ǡͬͬͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 1 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͭ-ͱ
Ta„le ͭ.ͯ Raceway Pump Station CIP Summary
ProŒect No. ProŒect ProŒect Components Dri˜er Cost
ͭ͵ Buildin‰ and Site Items
x Replace lou˜ered doors with
hollow metal doors with solid
panels
x Install concrete „erm alon‰
south side of compound
x Initial repair and application of
paint/coatin‰
x Replace floodli‰ht on roof
x Install MCC sur‰e protection
de˜ice
x Connect li‰ht fištures to
photoelectric sensor
x Replace fence with ʹ' candy
cane-style security fence
x Condition
x Safety
x Risk
͈͵ͳǡͬͬͬ
ͮͬ Sewa‰e Grinder
Impro˜ements
x Demo ešistin‰ ‰rinder and „ar
screen
x Install dual channel ‰rinders
with o˜erflow „ar racks
x Di˜ert flow to El Fuerte pump
station instead of „ypass
pumpin‰
x Condition
x Risk
x Operations
Impro˜ements
x Reduced la„or
͈ͭͲͭǡͬͬͬ*
ͮͭ PLC Replacement x Replace PLC x Condition ͈ʹʹǡͬͬͬ*
ͮͮ Emer‰ency O˜erflow
Stora‰e Pond
x Replace concrete cur„ and
handrail around perimeter
x Replace ͭʹ̺ emer‰ency
o˜erflow flap ‰ate
x Install epošy/polyurethane
coatin‰ to entire surface of
pond
x Condition
x Risk
͈ͭʹͳǡͬͬͬ
ͮͯ Odor Control Unit x Replace odor control unit x Condition ͈ͮ͵ǡͬͬͬ ͮͰ Plu‰ at RPS/Carls„ad
Interconnect
x Replace ešistin‰ plu‰ with ̺ͭͬ
full port plu‰ ˜al˜e
x Condition
x Risk ͈ͰͰǡͬͬͬ
ͮͱ Ešhaust Fan Replacement
x Install centrifu‰al ešhaust fan
rated Ͳͬͬ CFM
x Install ͬ.ͱ hp fan motor
x Ener‰y
efficiency
x Impro˜ed work
en˜ironment
͈ͭͭǡͬͬͬ
ͮͲ Pressure Sur‰e
Impro˜ements
x Install ͭǡͬͬͬ ‰allon sur‰e tank
x Install ˜acuum relief ˜al˜es x Risk ͈ͱͮͭǡͬͬͬ
ͮͳ Assets Nearin‰ End of
Useful Life
x Replace su„mersi„le Pump
Nos. ͭǡ ͮǡ and ͯ with Vau‰han
chopper pumps
x Condition
͈ͭͳͬǡͬͬͬ
ͮʹ V & A Recommendations x Replace corroded conduits on electrical „oš
x Condition
͈ͭͬǡͬͬͬ
Total Estimated Costs ͈ͭǡͬͲ͵ǡͬͬͬ
05/13/2025 C9 401 of 1078
CITY OF VISTA | CHAPTER 1 | PUMP STATION REHABILITATION STUDY ͭ-Ͳ | AUGUST ͮͬͭͲ | FINAL
Ta„le ͭ.Ͱ Buena Creek Pump Station CIP Summary
ProŒect
No. ProŒect ProŒect Components Dri˜er Cost
ͮ͵ Buildin‰ and Site
Items
x Install concrete „erm
„etween compound and
creek
x Install access stairs and
erosion control on slope for
access to SDG&E meter
ca„inet
x Crack inŒection to remediate
an acti˜e leak in the pump
room
x Initial repair and application
of paint/coatin‰
x Replace return pump control
panel pilot li‰hts
x Asphalt repair and o˜erlay
x Replace fence with ʹ' candy-
cane style security fence
x Condition
x Safety
x Risk
͈ͭ͵ͱǡͬͬͬ
ͯͬ VFD and PLC
Replacement
x Replace PLC
x Replace VFD's for Pump Nos.
ͭǡ ͮǡ Ͱǡ and ͱ
x Condition
x Risk ͈ͭǡͬͯʹǡͬͬͬ*
ͯͭ Redundant
Forcemain
x Install ͮͰ̺ HDPE redundant
forcemain alon‰ the
ali‰nment of the ešistin‰
ešcess effluent line
x Risk
͈ͳǡ͵͵ͮǡͬͬͬ
ͯͮ Val˜e
Replacement
x Replace all forcemain plu‰
˜al˜es ȋthree ʹ̺ǡ se˜enteen
̺ͭͮǡ three ͭͰ̺ǡ one ͮͰ̺ plu‰
˜al˜esȌǡ includin‰ motor-
operated ˜al˜es at pumps ͮ
and ͯ
x Replace the ̺ͭͮ flan‰ed
check ˜al˜e at pumps ͭǡ ͮǡ ͯǡ
Ͱǡ and ͱ
x Condition
͈ͮͯͯǡͬͬͬ
ͯͯ
Wet Well Liner
Replacement and
Gate Repairs
x Surface preparation and
concrete repair in wet well
x Install new coatin‰
x Bypass pumpin‰
x Replace stop lo‰s
x Replace seal on sluice ‰ate
x Replace seals on slide ‰ates
x Condition
x Risk
͈ͱͮͱǡͬͬͬ*
ͯͰ
Odor Control
Unit
Reha„ilitation
x Paint and patch fi„er‰lass
housin‰
x Replace „lower control panel
pilot li‰hts
x Condition
͈Ͳǡͬͬͬ
05/13/2025 C9 402 of 1078
PUMP STATION REHABILITATION STUDY | CHAPTER 1 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͭ-ͳ
Ta„le ͭ.Ͱ Buena Creek Pump Station CIP Summary ȋCont.Ȍ ProŒect
No. ProŒect ProŒect Components Dri˜er Cost
ͯͱ Automation of
Gates
x Install motor-operated ‰ate
actuators to the sluice ‰ate
that di˜ides wet well and
„oth slide ‰ates upstream of
the ‰rinders
x Operations
Impro˜ements
͈ʹͱǡͬͬͬ
ͯͲ Ešhaust Fan
Replacement
x Install centrifu‰al ešhaust
fan rated ͮͮͱͬ CFMǡ with ͭ.ͱ
hp fan motor in pump room
x Install centrifu‰al roof supply
fan rated ͳͬͬͬ CFMǡ with ͯ
hp fan motor on roof
x Ener‰y efficiency
x Impro˜ed work
en˜ironment
͈ͯͬǡͬͬͬ
ͯͳ Pump Selection
Pro‰rammin‰
x Pro‰rammin‰ to allow to
select pump se“uence in any
order
x Operations
Impro˜ements ͈ͭͬͬǡͬͬͬ
ͯʹ Pressure Sur‰e
Impro˜ements
x Install ͭǡͬͬͬ ‰allon sur‰e
tank
x Install ˜acuum relief ˜al˜es
x Risk
͈ʹͭͮǡͬͬͬ
ͯ͵
Assets Nearin‰
End of Useful
Life
x Replace ʹ̺ Shadowrid‰e flow
meter
x Replace ͭͰ̺ Encina flow
meter
x Replace ‰as analyœer
x Reha„ilitate sewa‰e pumps
ͭǡ ͮǡ ͯǡ Ͱǡ and ͱ
x Condition
͈ͭͭʹǡͬͬͬ
Ͱͬ V & A ProŒects x Cathodic Protection x Risk ͈ͭǡʹͲͲǡͬͬͬ Total Estimated Costs ͈ͭͭǡͰͯͳǡͬͬͬ

1.3 CIP Project Prioritized List
The CIP ProŒects were prioritiœed usin‰ a Dztriple „ottom linedz approach that considered the financialǡ en˜ironmentalǡ and social impacts of a proŒect. This approach helped e˜aluate and wei‰ht each proŒect. Each of the three cate‰ories had the followin‰ ‰oals:
x Financial ȋͯͬ percentȌ: Implement cost effecti˜e proŒects and solutions. Mašimiœe economic „enefits for customers throu‰h cost-effecti˜e operations. x En˜ironmental ȋͰͬ percentȌ: Meet or ešceed permit limits and minimiœe reporta„le offenses. Impro˜e ha„itat and minimiœe impacts to the local and ‰lo„al en˜ironment. x Social ȋͯͬ percentȌ: Maintain a hi‰h standard of work safety and protection and mašimiœe community „enefits throu‰h impro˜ed aesthetics and recreational uses.

The criteria rankin‰ wei‰hts were determined after discussin‰ with the City how each criterion factors into the City's and EWA's ‰oals. Ta„le ͭ.ͱ shows the prioritiœed proŒect list of proŒects. In the listǡ each proŒect’s score is presented accordin‰ to the ̺triple „ottom line̺ comparison and 05/13/2025 C9 403 of 1078
CITY OF VISTA | CHAPTER 1 | PUMP STATION REHABILITATION STUDY ͭ-ʹ | AUGUST ͮͬͭͲ | FINAL
the proŒect cost. The Total Prioritiœed ProŒect Costs does not include proŒects identified later in the study.

Appendiš A pro˜ides the ̺triple „ottom line̺ comparison ta„les. Section ͱ pro˜ides additional Œustification and e˜aluation of the top-rated proŒects.

Ta„le ͭ.ͱ Prioritiœed ProŒect List
Potential ProŒect
Pump
Station
Rankin‰ Cate‰ory and Wei‰ht
ProŒect Cost
Social En˜ironmental Financial Total
Rankͯͬά Ͱͬά ͯͬά
Grinder Replacement BVPS ͯ.͵ Ͱ.ʹ ͯ.͵ ͭͮ.Ͳ ͈ͮǡͯͭͮǡͬͬͬ
Grinder Impro˜ements RPS ͯ.ͬͰ .ͬͯ .ͬͭ ͬ .͈ͬ ͭ Ͳ ͭ ǡ ͬ ͬ ͬ * VFD/PLC Replacement BCPS ͭ.ʹ Ͱ.Ͱ ͯ.ͬ ͵.ͮ ͈ͭǡͬͯʹǡͬͬͬ*
Redundant FM BCPS ͬ.͵Ͱ .Ͱͯ .ͬʹ .ͯ ͈ͳǡ͵͵ͮǡͬͬͬ
Val˜e Replacement BVPS ͮ.Ͱ ͯ.ͮ ͮ.ͳ ʹ.ͯ ͈ͮͰͮǡͬͬͬ
Buildin‰ Items and Site
Work BVPS ͬ.Ͳͯ .Ͳͯ .͵ʹ .ͭ ͈Ͳ͵ͯǡͬͬͬ
FM Plu‰ Val˜e
Replacement &
Automation
BCPS ͮ.Ͱ ͮ.ʹ ͮ.ͳ ͳ.͵ ͈ͮͯͯǡͬͬͬ
Vapor Phase Odor Control BVPS ͯ.ͯͮ .ʹͭ .ͱͳ .Ͳ ͈ͱͰͱǡͬͬͬ
Buildin‰ and Site
Impro˜ements BCPS ͮ.ͳ ͯ.Ͳ ͭ.ͮ ͳ.ͱ ͈ʹͬǡͬͬͬ
Buildin‰ and Site
Impro˜ements RPS ͮ.ͳͯ .Ͳͭ .ͮͳ .ͱ͈ ͯ Ͳ ǡ ͬ ͬ ͬ
Reha„ Pump Nos. Ͱ & ͱ BVPS ͭ.ͮ ͯ.ͮ ͯ.ͬ ͳ.Ͱ ͈ͱͬǡͬͬͬ
Assets Nearin‰ End of
Useful Life BVPS ͭ.ͱͰ .ͬͭ .ʹͳ .͈ͯ ͳ ͭ ͵ ǡ ͬ ͬ ͬ
PLC Replacement RPS ͭ.ʹ ͮ.ʹ ͮ.ͳ ͳ.ͯ ͈ʹʹǡͬͬͬ*
VFD/PLC Replacement BVPS ͭ.ͱͮ .Ͱͯ .ͬͲ .ʹ ͈ͭǡͭͮͮǡͬͬͬ *
Asphaltǡ O˜erlay BVPS ͯ.ͬ ͮ.ͬ ͭ.ʹ Ͳ.ʹ ͈Ͳͬǡͬͬͬ
Wet Well Liner
Replacement and Gate
Repairs
BCPS ͬ.ͯͯ .ͱͮ .ͳͲ .Ͳ ͈ͱͮͱǡͬͬͬ *
Wet Well Reha„ilitation BVPS ͭ.ͱ ͯ.Ͳ ͭ.ͮ Ͳ.ͯ ͈͵ͬͭǡͬͬͬ
Le˜el Monitor Up‰rades BVPS ͮ.ͭͮ .Ͱͭ .ʹͲ .͈ͯ ͮ ͵ ǡ ͬ ͬ ͬ O˜erflow Stora‰e Pond RPS ͭ.ͮ ͮ.ʹ ͮ.ͭ Ͳ.ͭ ͈ͭʹͳǡͬͬͬ
Replace Floatin‰ Plu‰ at
RPS/Carls„ad
Interconnect
RPS ͬ.Ͳͮ .ʹͮ .ͳͲ .͈ͭ Ͱ Ͱ ǡ ͬ ͬ ͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 1 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͭ-͵
Ta„le ͭ.ͱ Prioritiœed ProŒect List ȋCont.Ȍ
Potential ProŒect
Pump
Station
Rankin‰ Cate‰ory and Wei‰ht
ProŒect Cost
Social En˜ironmental Financial Total
Rankͯͬά Ͱͬά ͯͬά
Backflow Pre˜enter BVPS ͬ.͵ ͮ.Ͱ ͮ.ͭ ͱ.Ͱ ͈ͳͬǡͬͬͬ
Fence BCPS ͮ.ͭͭ .Ͳͭ .ͱͱ .ͮ ͈ͲͲǡͬͬͬ
Assets Nearin‰ End of
Useful Life BCPS ͬ.Ͳ ͮ.Ͱ ͭ.ʹ Ͱ.ʹ ͈ͭͭʹǡͬͬͬ
Odor Control Unit RPS ͬ.͵ͮ .Ͱͬ .Ͳͯ .͵ ͈ͮ͵ǡͬͬͬ
Fence RPS ͮ.ͭ ͬ.Ͱ ͭ.ͮ ͯ.ͳ ͈Ͳͭǡͬͬͬ
Assets Nearin‰ End of
Useful Life RPS ͬ.ͬͮ .ͬͭ .ͱͯ .ͱ ͈ͭͳͬǡͬͬͬ
V&A Recommendations BCPS ͬ.Ͳ ͭ.Ͳ ͬ.͵ ͯ.ͭ ͈ͭǡʹͲͲǡͬͬͬ
Automation of Gates BCPS ͭ.ͱͭ .ͮͬ .ͯͯ .ͬ ͈ʹͱǡͬͬͬ
Ešhaust Fan
Replacement BCPS ͯ.ͬ ͬ.ͬ ͬ.ͬ ͯ.ͬ ͈ͯͬǡͬͬͬ
Asphaltǡ O˜erlay BCPS ͭ.ͮͬ .ʹͬ .͵ͮ .͵ ͈Ͱ͵ǡͬͬͬ
Odor Control Unit Repair BCPS ͬ.͵ ͬ.ʹ ͬ.͵ ͮ.Ͳ ͈Ͳǡͬͬͬ
V&A Recommendations RPS ͬ.ͯͭ .Ͳͬ .Ͳͮ .ͱ͈ ͭ ͬ ǡ ͬ ͬ ͬ
Ešhaust Fan
Replacement RPS ͮ.Ͱ ͬ.ͬ ͬ.ͬ ͮ.Ͱ ͈ͭͭǡͬͬͬ
Ešhaust Fan
Replacement BVPS ͭ.ʹͬ .ͬͬ .ͬͭ .ʹ ͈ͮ͵ǡͬͬͬ
Total Prioritized Project Costs ͈ͭ͵,Ͳͱͳ,ͬͬͬ

1.4 CIP Consolidated Projects
Durin‰ a workshop to discuss the CIP and its or‰aniœationǡ the City decided to consolidate proŒects with similar scopes and ‰roup them with four lar‰e proŒects. As part of this decisionǡ the three lar‰est proŒects would make up their own CIPǡ and the smaller non-critical items would „e consolidated into one lar‰e CIP.

For the current proŒectǡ proŒects scheduled for completion in ͮͬͭͲǡ recommended studiesǡ and assessments are kept separate. The resultin‰ four CIP proŒects are:
x Buena Vista Grinder Replacement.
x Buena Creek Redundant Forcemain.
x Buena Vista Vapor Phase Odor Control.
x Consolidated Reha„ilitation Itemsǡ includin‰ all remainin‰ items that do not re“uire pump station shutdown or „ypass pumpin‰.
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Of these proŒectsǡ the Buena Vista Vapor Phase Odor Control proŒect was deemed most ur‰ent if the plans for a resort constructed adŒacent to the pump station proceeds. This resort would „ea new odor receptorǡ re“uirin‰ ade“uate odor control. Installin‰ a redundant forcemain for the BCPS is also critical „ecause of the risk associated with pipeline failure.

The remainin‰ items are primarily smaller cost items that do not re“uire pump station shutdown or „ypass pumpin‰. Thusǡ these proŒects are ‰rouped to‰ether. Ta„le ͭ.Ͳ pro˜ides the list of consolidated proŒectsǡ includin‰ cost.

Ta„le ͭ.Ͳ Consolidated ProŒects
ProŒect ID ProŒect
Pump
Station
Hi‰hest Rank of
included ProŒects ProŒect Cost
ͭ
Current ProŒect:

VFD/PLC Replacement;
Grinder Impro˜ements
ȋRPSȌ; Wet Well Reha„
All sites ͭͬ ͈ͮǡ͵ͯͰǡͬͬͬ
ͮ Grinder Replacement
BVPS
ͭͭ.Ͳ ͈ͮǡͯͭͮǡͬͬͬ
ͯ Consolidated
Reha„ilitation Items All sites ʹ.ͯ ͈ͳǡͰͬͲǡͬͬͬ
Ͱ Redundant Forcemain BCPS ʹ.ͯ ͈ͳǡ͵͵ͮǡͬͬͬ
ͱ Vapor Phase Odor
Control BVPS Ͳ.ͱ ͈ͱͰͱǡͬͬͬ
Ͳ Studies and
Assessments All sites - ͈ͱͱͱǡͬͬͬ
Total Estimated Costs ͈ͮͭ,ͳͰͰ,ͬͬͬ
05/13/2025 C9 406 of 1078
PUMP STATION REHABILITATION STUDY | CHAPTER 2 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͮ-ͭ
Chapter 2

INTRODUCTION AND BACKGROUND

2.1 Background
The City and BSD convey raw wastewater for treatment at the EWA EWPCF in Carlsbad. The Agua Hedionda Pump Station (AHPS) and BVPS convey flow from both the City of Vista and the City of Carlsbad. The RPS conveys flow from the City of Vista, and BCPS from the BSD. The EWA operates and maintains each station for the City and the EWA.

This study addresses only BVPS, RPS, and BCPS. Figureͮ.ͭ shows the location of the three pump stations and the EWPCF.

Figure ͮ.ͭ City of Vista Pump Station Vicinity Map
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CITY OF VISTA | CHAPTER 2 | PUMP STATION REHABILITATION STUDY ͮ-ͮ | AUGUST ͮͬͭͲ | FINAL

2.2 Previous Reports
In
anuary of ͮͬͬʹ, Dudek prepared the Sewer Master Plan Update for the City and BSD. The report updated the ͮͬͬͭ Sewer Master Plan and addressed newly adopted State regulations.

The report methodology included modeling to determine future flow conditions, which were used in the hydraulic evaluation of this Pump Station Rehabilitation Study. Existing flow conditions were compiled from flow data from April ͮͬͭͮ to March ͮͬͭͱ, provided by the EWA.

Table ͮ.ͭ provides the flow rates used for evaluation of existing and future conditions.

Table ͮ.ͭ Existing and Future Flow Rates
Pump Station
Existing Conditions Future Conditions
Average
Daily Flow
(mgd)
Peak Day
Flow (mgd)
Average
Hourly Flow
(mgd)
Peak Hour
Flow (mgd)
Average
Flow (mgd)
Peak
Flow
(mgd)
Buena Vista ͱ.ͬͲ Ͳ.ͭͭ Ͱ.͵Ͳ ͵.ͬͮ ͳ.͵ͬ ͭͮ.ͭͮ
Raceway ͬ.ͯͰ ͬ .Ͱ͵ ͬ .ͯͮ ͬ .͵ͬ ͬ .͵ͭ ͭ .Ͱͮ
Buena Creek ͮ.ͭͯ ͮ.Ͳͬ ͮ.ͬͲ Ͱ.Ͱͮ ͯ.ʹͮ ͱ.ͳʹ
In ͮͬͭͮ, RMC Water and Environment (RMC) prepared the Encina Remote Facilities Comprehensive Asset Management Plan (R-CAMP®) for the EWA. The report provided a planning document for the ͮͬͭͰ fiscal year, covering replacement and rehabilitation needs at the BVPS, RPS, and BCPS. The R-CAMP® was reviewed to ensure that recommended projects and assets recommended for assessment or replacement were evaluated for inclusion in future projects.

2.3 Purpose
This Report has the following purposes:
x To provide a comprehensive condition assessment of each pump station, including specialty testing, evaluation of hydraulics and surge potential, environmental assessment, geotechnical review, survey and mapping of each pump station and the South Melrose corridor, and odor control assessment.
x To provide a grinder assessment for the RPS.
x To recommend projects for a CIP.
x To evaluate alternatives for a redundant forcemain for the BCPS. x To design electrical improvements for the immediate replacement of the variable frequency drives (VFD) at the BVPS and BCPS, and the programmable logic controllers (PLC) at BVPS, RPS, and BCPS. The PLC's and VFD's require immediate replacement as they are no longer supported by the manufacturers, making replacement parts unavailable.

Repair and replacement projects will be grouped together in the CIP so the pump stations can continue to operate. Additional CIP projects will be identified through a review of safety and operational issues and potential plant optimization projects. An implementation schedule will be 05/13/2025 C9 408 of 1078
PUMP STATION REHABILITATION STUDY | CHAPTER 2 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͮ-ͯ
developed based on each project's importance and necessity in meeting the City, BSD, and EWA's needs.

2.4 Buena Vista Pump Station
The City of Vista owns approximately ͵ͬ percent of the BVPS, and the City of Carlsbad owns approximately ͭͬ percent. In ͭ͵͵Ͱ, the facility was rebuilt to provide its current design capacity of ͮͯ.ͭ million gallons per day (mgd). Table ͮ.ͮ shows the design criteria for the BVPS.

Table ͮ.ͮ Buena Vista Pump Station Design Criteria
Component Criteria Unit Value
Pumps
Type Non-Clog, Dry-Pit
Centrifugal
Number each Ͱ
Capacity gpm each Ͳ,ͬͬͬ
Total Pump Station
Capacity mgd ͮͯ.ͭ
Total Pump Station
Capacity with one pump
out of service
mgd ͭͳ.ͯ
Motor Variable frequency
Drive
Surge Tank
Number ea ͮ
Size gallons ͭͬ,ͬͬͬ
Bar Screen
Number ea ͭ
Bar Spacing in ͮ
Communitor Number ea ͭ
Wet Well Capacity gallons ʹ,ͬͬͬ
At the BVPS, influent flow enters the wet well through a ͯͬ-inch PVC pipeline. Upon its arrival, an automated bar rack directs large debris into a communitor for shredding and returns it to the waste stream. Flow exits the pump station through a ͮͰ-inch PVC forcemain that connects to a gravity line leading to the EWPCF. In ͮͬͭͭ, a second ͮͰ-inch PVC forcemain was constructed for redundancy. Figure ͮ.ͮ shows the site plan of the existing facility.

For an average daily flow of ͱ.ͭ mgd, two of the station's four vertical dry-pit pumps operate in parallel to maintain a wet well level of Ͳͬ inches. Each of the four pumps operates in a lead ͭ, lead ͮ, lag, or standby configuration. For each pump, a PLC controls the dedicated VFD by responding to changes in flow.

During a power failure, two emergency standby generators keep the pump station operational.

Each generator can run three pumps at any speed. A berm surrounding the pump station provides approximately one million gallons of emergency storage. An air-gap tank and system 05/13/2025 C9 409 of 1078
CITY OF VISTA | CHAPTER 2 | PUMP STATION REHABILITATION STUDY ͮ-Ͱ | AUGUST ͮͬͭͲ | FINAL
pressurization pumps supply potable water used for seal water and sanitation needs. For ventilation, exhaust fans are present in the wet well and dry well.

Figure ͮ.ͮ Buena Vista Pump Station Site Plan

2.4.1 Buena Vista Pump Station Hydraulic Evaluation
EWA provided flow measurement data for the BVPS for a hydraulic evaluation of the pump station to identify potential issues from pump operations and capacity and high or low velocities through the forcemain. Data included average daily flow from April ͭ, ͮͬͭͮ, through April ͮͲ, ͮͬͭͮ, and September ͭ, ͮͬͭͮ, through March ͯͭ, ͮͬͭͱ. Also included were hourly flow measurements from April ͭ, ͮͬͭͰ, to March ͯͭ, ͮͬͭͱ. The missing values from April ͮͳ, ͮͬͭͮ, to August ͯͬ, ͮͬͭͮ, are likely from instrumentation failure. Weather Underground provided the precipitation data.

Figure ͮ.ͯ presents historical flow data from April ͮͬͭͮ to April ͮͬͭͱ. During this period, the average daily flow was ͱ.ͬͲ mgd, with a peak day flow of Ͳ.ͭͭ mgd.

A general trend of increased flow occurred during months of increased precipitation. However, the peak day flow occurred in March of ͮͬͭͯ, whereas the heaviest month of precipitation was in December of ͮͬͭͰ. This discrepancy shows that precipitation is not the only factor affecting sewer flows.
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Figure ͮ.ͯ BVPS: Average Daily Flows by Month
Figure ͮ.Ͱ shows flow measurement data collected hourly from April ͮͬͭͰ to March ͮͬͭͱ. As the figure shows, the monthly maximum hourly flows are higher than the monthly average daily flows, with a peak of ͵ mgd.

Figure ͮ.Ͱ BVPS: Hourly Flows by Month
To evaluate wet weather flow conditions, flow measurement data, collected in ͭͱ-minute intervals, were collected from
anuary ͭ, ͮͬͭͬ, to December ͯͭ, ͮͬͭͬ. The region typically experiences minimal precipitation, but ͮͬͭͬ was a particularly wet year.

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 3.0

3.5 4.0

4.5 5.0

5.5 6.0

6.5 Apr-12
Jul-12
Oct-12
Jan-13
May-13
Aug-13
Nov-13
Mar-14
Jun-14
Sep-14
Dec-14
Apr-15
Precipitation, inches
Daily flow, mgd
Precipitation Monthly Average Daily Flow Monthly Minimum Flow Monthly Maximum Flow Average Daily Flow Peak Day Flow

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 0.0

1.0 2.0

3.0 4.0

5.0 6.0

7.0 8.0

9.0 10.0
Apr-14
May-14
Jun-14
Jul-14
Aug-14
Sep-14
Oct-14
Nov-14
Dec-14
Jan-15
Feb-15
Mar-15
Precipitation, inches
Hourly Flow, mgd
Precipitation Monthly Average Hourly Flow
Monthly Minimum Hourly Flow Average Flow
Peak Hour Flow Monthly Maximum Hourly Flow
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Figure ͮ.ͱ presents the average monthly flow. While the average flow is similar to that seen from ͮͬͭͮ to ͮͬͭͱ, precipitation in the region increased the monthly maximum flow, with a peak flow of ͭͯ mgd corresponding to the month of heaviest precipitation in December.

Figure ͮ.ͱ BVPS: ͮͬͭͬ Average Flow by Month
A hydraulic analysis was performed on the forcemain and pumps at the BVPS to determine the system curve. Figure ͮ.Ͳ shows the system and pump curves. According to the analysis, a single pump can handle the average hourly flow and peak hour flow demands, and three pumps can handle the design capacity. With four pumps installed, the pump station demands can be met with one pump out of service.

Figure ͮ.Ͳ BVPS: Forcemain System and Pump Curves
0 2
4 6
8 10
12 14
0 2
4 6
8 10
12 14

JAN FEB MAR APR MAY JUN JUL AUG SEPT OCT NOV DEC
Precipitation, inches
Daily Flow, mgd
Precipitation Average Flow
Maximum Flow Monthly Average Flow
Monthly Minimum Flow Monthly Maximum Flow
0 50
100
150
200
250
300
0 5,000 10,000 15,000
TDH, ft
Flow, gpm
System Curve 1 Pump at 74% 1 Pump at 83%
3 Pumps at 100% Average Hourly Flow Peak Hour Flow
Design Capacity
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The velocity through the forcemain must be high enough to prevent solids deposition in the pipeline but low enough to prevent excessive noise, vibration, and wear and tear of the system.

The ideal velocity in sewage piping ranges from ͮ to ͭͬ force per second (fps).

Table ͮ.ͯ presents flow velocities in the ͮͰ-inch diameter forcemains leaving the pump station at the average hourly and peak hour flow for existing and future conditions. At these flow rates, solids deposition is minimized, and damage to the pipeline is not expected.

Table ͮ.ͯ BVPS: Velocity in Forcemains
Flow Condition
Existing Conditions Future Conditions
Flow (mgd) Velocity (fps) Flow (mgd) Velocity (fps)
Average Hourly Ͱ.͵Ͳ ͮ.Ͱͮ ͳ.͵ͬ ͯ.ʹ͵
Peak Hour ͵.ͬͮ Ͱ .ͰͰ ͭͮ .ͭͮ ͱ .͵ͳ

2.5 Raceway Pump Station
The City of Vista owns the RPS. In ͮͬͬͳ, the facility was replaced with the existing facility, which has a design flow of ͭ.͵ mgd. The current average daily wastewater influent flow is approximately ͬ.ͱ mgd. Table ͮ.Ͱ shows the design criteria for the RPS.

Table ͮ.Ͱ Raceway Pump Station Design Criteria
Component Criteria Unit Value
Pumps
Type Vertical Solids-Handling
Submersible
Number each ͯ
Capacity gpm each Ͳͱͬ
Total Pump Station
Capacity mgd ͭ.͵
Total Pump Station
Capacity with one pump
out of service
mgd ͭ.ͯ
Motor Variable frequency
Drive
Surge Tank
Number ea ͬ
Size gallons N/A
Bar Screen
Number ea ͭ
Bar Spacing in ͮ.ͮͱ
Communitor Number ea ͭ
Wet Well Capacity gallons ͱ,Ͱͬͬ
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Influent enters the pump station through a ͭͮ-inch PVC gravity main. Upon arrival, the flow either passes through a channel grinder or is diverted to a bar screen during increased flow or for grinder failure/removal. The grinder and bar screen help to remove debris from the wastewater to prevent it from entering the wet well and damaging downstream equipment.

Effluent leaves the pump station through an ʹ-inch PVC forcemain, which connects to the BSD's forcemain to the EWPCF. Figure ͮ.ͳ shows the site plan of the existing pump station.

For approximately one year, the channel grinder has been out of service. Initially, the grinder was removed for maintenance. Once removed, issues with the manufacturer caused delays that have prevented its return to service, leaving the bar screen as the only method of debris removal.

One of three submersible pumps handles influent flow at the RPS. Each pump operates in a lead, lag, or standby configuration to adjust to variations in flow. A PLC controls a dedicated VFD to operate the pumps to maintain a wet well level setpoint of Ͳͬ inches.

The operating volume of the wet well is approximately ͱ,Ͱͬͬ gallons. An overflow storage pond provides ͭͱͲ,ͬͬͬ gallons of emergency storage on-site. During power failure, the pump station has one standby generator to ensure continuity. A carbon scrubber provides vapor phase odor control to minimize impact to neighboring businesses, even though sulfide levels at the inlet are typically zero.

Figure ͮ.ͳ Raceway Pump Station Site Plan
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2.5.1 Raceway Pump Station Hydraulic Evaluation
EWA provided the existing sewer flow data as daily averages of the hourly flow measurements collected from April ͭ, ͮͬͭͮ, to March ͯͭ, ͮͬͭͱ. Figure ͮ.ʹ presents the data in relation to the monthly precipitation. As observed in the data for the BPS, the peak flow occurs separately from the peak precipitation month.

Figure ͮ.ʹ RPS: Average Daily Flow by Month
Figure ͮ.͵ provides hourly flow data. The data show a correlation between the peak hour flow and high precipitation events. The peak hour flow of ͬ.͵ͬ mgd is notably higher than the peak day flow, demonstrating wide fluctuations in flow throughout the day.

Figure ͮ.͵ RPS: Hourly Flow by Month

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 0.10

0.15 0.20

0.25 0.30

0.35 0.40

0.45 0.50

0.55 Apr-12
Jul-12
Oct-12
Jan-13
May-13
Aug-13
Nov-13
Mar-14
Jun-14
Sep-14
Dec-14
Apr-15
Precipitation, inches
Daily Flow, mgd
Precipitation Monthly Average Flow Monthly Minimum Flow Monthly Maximum Flow Average Daily Flow Peak Day Flow

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 0.0

0.1 0.2

0.3 0.4

0.5 0.6

0.7 0.8

0.9 1.0
Apr-14
May-14
Jun-14
Jul-14
Aug-14
Sep-14
Oct-14
Nov-14
Dec-14
Jan-15
Feb-15
Mar-15
Precipitation, inches
Hourly Flow, mgd
Precipitation Monthly Average Hourly Flow
Monthly Minimum Hourly Flow Average Flow
Peak Hour Flow Monthly Maximum Hourly Flow
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To evaluate wet weather flow conditions, the EWA provided flow measurement data, collected in two-minute intervals, from January ͭ, ͮͬͭͬ, to December ͯͭ, ͮͬͭͬ.

Figure ͮ.ͭͬ shows the average flows measured during a wet year. As the figure shows, the average flow is similar to that in ͮͬͭͮ to ͮͬͭͱ data, but the monthly maximum flow exceeds design capacity in most months. The RPS was able to handle these short duration peaks with no adverse effects noted.

Figure ͮ.ͭͬ RPS: ͮͬͭͬ Average Flow by Month
Figure ͮ.ͭͭ presents the system and pump curves for the RPS. A single pump can meet average and peak hourly flow demands, while three pumps are required to meet the design capacity.

Figure ͮ.ͭͭ RPS: Forcemain System and Pump Curves
0 1
2 3
4 5
6 7

0.0 0.5

1.0 1.5

2.0 2.5

JAN FEB MAR APR MAY JUN JUL AUG SEPT OCT NOV DEC
Precipitation, inches
Daily Flow, mgd
Precipitation Average Flow Maximum Flow
Monthly Average Flow Monthly Minimum Flow Monthly Maximum Flow Design Capacity
0 50
100
150
200
250
0 200 400 600 800 1,000 1,200 1,400
TDH, ft
Flow, mpg
System Curve 1 Pump at 57% 1 Pump at 73%
3 Pumps at 96% Average Hourly Flow Peak Hour Flow
Design Capacity
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The ʹ-inch PVC forcemain exits the pump station and connects to the ͮͰ-inch diameter BSD forcemain about ͭ,ͳͬͬ feet downstream, adding to the flow from the BCPS.

Table ͮ.ͱ shows the velocities through the forcemain under existing and future conditions. At the average hourly flow rate, solids deposition is a concern. However, peak flows throughout the day likely move the depositied solids along the pipeline.

Table ͮ.ͱ RPS: Velocity through Forcemain
Flow Condition
Existing Conditions Future Conditions
Flow (mgd) Velocity (fps) Flow (mgd) Velocity (fps)
Average Hourly ͬ.ͯͮ ͭ.Ͱͯ ͬ.͵ͭ Ͱ.ͬͯ
Peak Hour ͬ.͵ͬ ͯ .͵ʹ ͭ .Ͱͮ Ͳ .ͮ͵

2.6 Buena Creek Pump Station
The BSD owns the BCPS, which was built in ͮͬͬͮ. The pump station has a design capacity of ʹ.ʹ mgd and an average daily flow of ͮ.ͭ mgd. Table ͮ.Ͳ shows the design criteria for the BCPS.

Table ͮ.Ͳ Buena Creek Pump Station Design Criteria
Component Criteria Unit Value
Pumps
Type Non-Clog, Dry-Pit
Centrifugal
Number each ͱ
Capacity gpm each ͭ@ͭ,ͳͯͲ; ͭ@ͯ,Ͳͬͬ;
ͯ@ͮ,ͬͯͳ
Total Pump Station
Capacity mgd ʹ.ʹ
Total Pump Station
Capacity with one pump
out of service
mgd ͳ.ͬ
Motor Variable frequency
Drive
Surge Tank
Number ea ͭ
Size gallons ͭ,ͬͬͬ
Bar Screen
Number ea ͬ
Bar Spacing in N/A
Communitor Number ea ͮ
Wet Well Capacity gallons ͮͱ,ͳͱͬ
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Influent enters the pump station through dual ͮͰ-inch pipelines. Before entering the wet well, influent passes through parallel channel grinders. Effluent leaves the pump station through a ͮͰ-inch ductile iron pipeline that connects to an ͭʹ-inch PVC forcemain. This forcemain ultimately joins BSD's forcemain to the EWPCF. Figure ͮ.ͭͮ shows the site plan of the existing facility.

Figure ͮ.ͭͮ Buena Creek Pump Station Site Plan
The wet well is divided into two sections, which can be isolated by a slide gate for maintenance without impeding operations. A PLC monitors the wet well level using level sensors and controls the dedicated pump VFDs to maintain a level setpoint of Ͳͬ inches. Under normal conditions, two of the five dry-pit pumps operate in parallel to handle flows, with additional pumps available during pump failure or high flow conditions.

The pump station currently directs all flow to the EWPCF through the Encina forcemain.

However, it can convey flow to the Shadowridge Water Reclamation Facility (SWRF). Although the SWRF was shut down in ͮͬͬͯ, flows can be sent there for emergency storage or maintenance.

A valve at Pump No. ͭ allows flow to be manually diverted to either the EWPCF or to the SWRF.

Pump Nos. ͮ and ͯ then send flow to either facility using motorized discharge valve actuators.

Pump Nos. Ͱ and ͱ pump flow to the EWPCF and are the most frequently used pumps. 05/13/2025 C9 418 of 1078
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The abandoned SWRF pump vault provides emergency storage. The vault is made of unlined concrete and has a capacity of ͱͬ,ͬͬͬ gallons. Additional overflow storage is provided by topography that directs flow away from the adjacent creek and into a natural depression.

An emergency standby generator supplies power to the pump station during a commercial power failure. A biofilter that removes hydrogen sulfide from the wet well exhaust provides vapor phase odor control. A surge protection system protects the Encina forcemain against water hammer.

2.6.1 Buena Creek Pump Station Hydraulic Evaluation
The BCPS receives all flow from the BSD. Figure ͮ.ͭͯ presents the daily flow measurement data from April ͮͬͭͮ to March ͮͬͭͱ. The peak day flows correspond to the months experiencing higher precipitation, showing that rain events affect the BCPS flow.

Figure ͮ.ͭͯ BCPS: Average Daily Flow by Month
Figure ͮ.ͭͰ shows that the peak hour flow is much higher than the peak day flow. This correlates with the trend of increased flow with increased precipitation.

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 1.7

1.9 2.1

2.3 2.5

2.7 Apr-12
Jul-12
Oct-12
Jan-13
May-13
Aug-13
Nov-13
Mar-14
Jun-14
Sep-14
Dec-14
Apr-15
Precipitation, inches
Daily Flow, mgd
Precipitation Monthly Average Daily Flow
Monthly Minimum Daily Flow Monthly Maximum Daily Flow
Average Daily Flow Peak Day Flow
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Figure ͮ.ͭͰ BCPS: Hourly Flow by Month
To evaluate wet weather flow conditions, the EWA provided flow measurement data, collected every two minutes from January ͭ, ͮͬͭͬ, to December ͯͭ, ͮͬͭͬ.

Figure ͮ.ͭͱ shows the same trend of increased flow with increased rain events. The maximum monthly flow and highest rain event occurred in December ͮͬͭͬ, with flows above design capacity. The BCPS was able to handle the short-term high flow with no adverse effects noted.

Figure ͮ.ͭͱ BCPS: ͮͬͭͬ Average Flow by Month

0.00 0.50

1.00 1.50

2.00 2.50

3.00 3.50

4.00 0.0

0.5 1.0

1.5 2.0

2.5 3.0

3.5 4.0

4.5 5.0
Apr-14
May-14
Jun-14
Jul-14
Aug-14
Sep-14
Oct-14
Nov-14
Dec-14
Jan-15
Feb-15
Mar-15
Precipitation, inches
Hourly Flow, mgd
Precipitation Monthly Average Hourly Flow
Monthly Minimum Hourly Flow Average Flow
Peak Hour Flow Monthly Maximum Hourly Flow
0 1
2 3
4 5
6 7

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 9.0

10.0 JAN FEB MAR APR MAY JUN JUL AUG SEPT OCT NOV DEC
Precipitation, inches
Daily Flow, mgd
Precipitation Average Flow Maximum Flow
Monthly Average Flow Monthly Minimum Flow Monthly Maximum Flow Design Capacity
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Figure ͮ.ͭͲ provides the system and pump curves for the BCPS. Four pumps can handle the design capacity, leaving one pump out of service.

Figure ͮ.ͭͲ BCPS: Forcemain System and Pump Curves
Table ͮ.ͳ presents the velocity through the ͮͰ-inch diameter PVC forcemain under existing and future conditions. At average flow rates, the velocity is below ͮ fps, creating conditions suitable for solids deposition. Peak hour flows are within the optimal range but are still fairly low for flushing built up solids.

Table ͮ.ͳ BCPS: Velocity through Forcemain
Existing Conditions Future Conditions
Flow (mgd) Velocity (fps) Flow (mgd) Velocity (fps)
Average Hourly ͮ.ͬͲ ͭ.ͬͭ ͯ.ʹͮ ͭ.ʹʹ
Peak Hour Ͱ.Ͱͮ ͮ .ͭʹ ͱ .ͳʹ ͮ .ʹͱ

2.7 Cost Estimates

2.7.1 Basis of Cost Estimates
The cost estimates used to budget CIP projects are provided as a “budget estimate” as defined by the American Association of Cost Engineers (AACE). This means that the expected accuracy range is accepted as somewhere between -ͮͬ to +ͯͬ percent of the actual cost. For each estimate, an estimating contingency was applied to capture items too detailed to be practical for a budget estimate.
50 70
90 110
130
150
170
190
210
230
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000
TDH, ft
Flow, gpm
System Curve 1 Pump at 90% 2 Pumps at 90%
4 Pumps at 96% Average Hourly Flow Peak Hour Flow
Design Capacity
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The following methods were used to develop cost estimates for projects:
x Pricing information from manufacturers.
x Analysis and review of cost curves projecting industry trends. x Scaling of closely related project costs.
x Estimates of major construction costs such as demolition, piping, and earthwork, with appropriate contingencies based on the applied level of detail.

Operations and Maintenance (O&M) costs were not applied to each estimate. Instead, they were applied, where appropriate, to project alternatives in which O&M costs were significantly different.

For estimates that considered historical data, an Engineering News Record (ENR) Construction Cost Index (CCI) of ͭͭ,Ͳͮʹ was used. This CCI represents a factor for the typical construction cost in Los Angeles as of October ͮͬͭͱ.

2.7.2 Project Cost Factors
Project cost factors have been developed to account for certain unknowns in cost estimating and to develop overall replacement costs and CIP project costs. Replacement and/or rehabilitation costs have been developed for projects identified during the course of the condition assessment.

Table ͮ.ʹ provides the cost factors.

Table ͮ.ʹ Project Cost Factors
Cost Factors
Applied Contingency for CIP
Project Costs
Construction and Estimating Contingency ͯͬ%
Contractor Overhead and Profit ͭͱ%
Sales Tax Ͱ%
Engineering, Legal, and Administrative Costs ͮͬ%
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PUMP STATION REHABILITATION STUDY | CHAPTER 3 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͯ-ͭ
Chapter 3

FACILITY CONDITION ASSESSMENT

3.1 Introduction
This chapter provides an overview of the condition assessments performed at the BVPS, the RPS, and the BCPS. For each pump station, asset condition was reviewed and the asset risk assessed. The basis for the assessment and a review of critical assets are also provided.

3.2 Methodology

3.1.1 Preparation
Before visiting the site, the inspection team was given record drawings and previous planning and design reports. The existing asset list, available through the R-CAMP® Report, was compared with these documents. Assets not on the list were identified and added, and the list was used to produce condition assessment forms for the team.

In addition to the asset list, specific forms were prepared for each engineering discipline (process/mechanical, structural, and electrical/instrumentation). The forms included common questions specific to each engineering discipline that identified potential issues with the each asset's condition. The completed forms are located in Appendices B, C, and D and are separated by pump station.

Before each site visit, a meeting was held between the Carollo inspection team and City and EWA staff to discuss known issues and relevant system information for identifying critical needs.

With the help of EWA staff, the Carollo inspection team answered questions, provided asset maintenance and replacement history, and provided additional information. Table ͯ.ͭ lists City and EWA staff, and Table ͯ.ͮ lists Carollo team members.

Table ͯ.ͭ City of Vista and Encina Water Authority Staff Agency Staff Member Role
City of Vista Elmer Alex, P.E. Principal Engineer
Alfred Pedroza, P.E. Senior Engineer
Encina Water Authority Dave Ummel Systems Manager
Octavio Navarrete Operations Manager
James Mattern Supervisor
John Fetu Maintenance Manager
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Table ͯ.ͮ Carollo Condition Assessment Team Members
Team Member Title
Jeff Weishaar, P.E. Project Manager
Troy Hedlund, P.E. Electrical/Instrumentation
Juan Loera, P.E. Mechanical
Rajnikanth Gedhada, P.E., S.E., LEED AP Structural
Sejal Mehta, E.I.T. Staff Engineer
Alan Mlakar, P.E. Staff Engineer
Risa Guysi, E.I.T. Staff Engineer

3.2.1 Condition Assessments
Condition assessments took place over three days in July ͮͬͭͱ. Specific dates are noted later in the chapter.

At each pump station, inspecting team members reviewed and evaluated each asset respective to their disciplines. Team members then took notes and photos and scored asset conditions on a scale of ͭ to ͱ, with ͭ indicating “Pristine; as if brand new” and ͱ meaning “unserviceable; replacement needed.”
Table ͯ.ͯ shows the Asset Condition Ranking Scale. The scale uses an industry standard derived from the International Infrastructure Management Manual (IIMM). In the table, the “Percent Requiring Rehabilitation” value reflects the percentage of an asset's worth that needs to be spent to bring it to a pristine, like-new condition.

Table ͯ.ͯ Asset Condition Ranking Scale
Ranking Name Description(ͭ)
Percent Requiring
Rehabilitation(ͭ)(ͮ)
ͭ Very
Good Pristine, brand new ͬ%
ͮ Good Performing well, routine
maintenance only ͬ-ͭͬ%
ͯ Fair Requires increased maintenance ͭͭ-ͮͬ%
Ͱ Poor Rehabilitation or replacement
needed ͮͭ-ͱͬ%
ͱ Very
Poor Unserviceable (replacement needed) ηͱͬ%
Notes:
(ͭ) Adapted from the International Infrastructure Management Manual. (ͮ) Percent of the value of the asset needed to return the asset to a condition one. 05/13/2025 C9 424 of 1078
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3.3 Buena Vista Pump Station Condition Assessment Findings The condition assessment at the BVPS occurred on Julyͮͮ, ͮͬͭͱ.

3.3.1 Sewage Grinder and Barscreen

3.3.1.1 Description
At the BVPS, solids are handled by an automated
barscreen and comminutor, Figure ͯ.ͭ. A rake collects
and drops solids collected on the barscreen into a
comminutor, which grinds the debris into smaller pieces before returning them to the waste stream. Piping is
installed to send flush water into the comminutor with
the solids to ensure that the ground solids are flushed into the wet well but flush water usage was discontinued since the manufacturer stated it was needed only if there were issues with rags directed to the comminutor.

The comminutor was installed in ͭ͵͵Ͳ and was
rehabilitated in ͮͬͬʹ. Every ͭͮ to ͭʹ months, it is
removed for service. The comminutor control panel and
hydraulic unit were installed in ͭ͵͵Ͳ. The barscreen and associated hydraulic unit and control panel were
installed in ͭ͵͵Ͳ and were rehabilitated in ͮͬͬͰ.

3.3.1.2 Findings
Neither the comminutor nor the barscreen has external controls through SCADA at the EWPCF.

The proprietary PLC system for the comminutor displays only ON/OFF or FAIL ALARM. Encina staff requested that signals be installed from the comminutor to the PLC to provide additional information and warnings and a means of remote operation for the grinder.

Grinding and screening were identified as weak areas within the pump station for several reasons. One, there is no redundancy for the comminutor or barscreen. Two, if a grinder fails or needs to be removed, the barscreen requires manual cleaning and does not adequately protect equipment downstream. Three, pump failures have resulted from rags not being properly ground up through the comminutor.

The comminutor control panel and hydraulic unit were in good condition. Only minor scratches were observed on the control panel's surface.

Although the barscreen was operational during the site visit, it was partially submerged and could not be thoroughly inspected while the pump station was operated. Neither the inspection team nor operations staff found defects in the visible portions of the barscreen.

Figure ͯ.ͭ Communitor and Barscreen
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3.3.2 Sewage Pumps and Motors

3.3.2.1 Description
The BVPS has four Yeoman's Chicago ͯͬͬ-hp vertical dry-pit centrifugal sewage pumps, Figure ͯ.ͮ. A motor support curb exists for a fifth pump if needed for future flow conditions. The pumps were installed as original equipment in ͭ͵͵ͱ and were
rehabilitated between ͮͬͬͳ and ͮͬͬʹ.

The sewage pump motors were installed in ͭ͵͵Ͳ and were
rehabilitated between ͮͬͬͯ and ͮͬͬͰ. Motor No. ͭ was the only exception. It was rehabilitated in ͮͬͬͳ.

Under normal operation, two pumps operate concurrently to maintain the wet well level setpoint. If these two pumps cannot maintain the level set point, the standby pump will come on-line.

The opposing pumps run at the same time.

3.3.2.2 Findings
During the visit, Pumps No. ͮ and ͱ were operational. Although both pumps appeared to be in good working condition, Pump No. ͱ was noisier and had more vibration than Pump No. ͮ. Inspectors noted popping sounds in the volute/impeller area on the pump, indicating the impeller may need to be replaced.

Corrosion was observed on the base supports of Pump No. ͭ and Pump No. Ͱ. Leakage and corrosion were also noted at the intake elbow of Pump No. Ͱ. As a result, recoating the pump and supports is recommended and included in the project described in Section Ͱ.ͮ.ͭ.

Pump No. ͭ was not running during the assessment. Although support equipment was noted as functional, excessive corrosion was observed on the base support. Conversely, Pump No. ͮ was in good condition, with all support equipment functional and no signs of leakage or corrosion.

For Pump No. ͮ, some vibration and noise were noted. As such, a complete structural analysis, described in Section Ͱ.ͮ.ͭͮ, is recommended to provide a clearer picture of its condition.

For Pumps No. ͭ and No. ͮ, no evidence of excessive corrosion or leaks was noted. Paint and support equipment were functional and in good condition.

The motors showed no signs of corrosion or damage. The contacts were clean and well maintained, and replacement parts are available for maintenance.

Figure ͯ.ͮ Sewage Pump Motor No. ͮ
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3.3.3 Surge Tanks

3.3.3.1 Description
On each of the two forcemains, two surge tanks protect the forcemains, other structures, and equipment from water hammer, Figure ͯ.ͯ. Water hammer occurs during sudden changes in the flow velocity from pump power failure, valves operating too quickly, or pipeline rupture. Damage can range from minor, such as loosening pipe joints, to catastrophic.

The surge tanks operate by maintaining a set water
level with pressurized air above it. If a surge event
causes water from the forcemain to enter the tank
and the water level to increase, a solenoid valve
opens to increase the tank pressure, which forces the
water to drain. If the water level is low, a different
solenoid valve opens to relieve the tank pressure and
let water return to the level setpoint. A compressor
re-pressurizes the tanks if the internal pressure falls below a specified level.

3.3.3.2 Findings
The two surge tanks at BVPS are inspected annually and were in good condition during the condition assessment. The original surge tank and control panel were installed in ͮͬͬͭ and were in good condition. The newer surge tank and control panel were installed in ͮͬͭͯ during the second forcemain installation. These were also in good condition, with no reported or observed issues.

No leakage or corrosion was evident on the tanks or support equipment, and the paint was intact. However, for maintenance, the tanks are accessed from a rolling staircase, which may not be safe for operators.

3.3.4 Valves

3.3.4.1 Description
The forcemain valves were installed in ͭ͵͵ͱ as original equipment. Each pump has two ͭͰ-inch eccentric plug valves, with one on the suction side of the each pump and one on the discharge side. Each plug valve is operated manually by a hand wheel or, if elevated, a chain wheel.

On the discharge header inside the building, three ͮͬ-inch isolation eccentric plug valves allow flow to be directed to either forcemain. These plug valves are manually operated with chain wheels.

3.3.4.2 Findings
The two ͭͲ-inch restrained mechanical plug valves that allow flow into the surge tanks were in good condition, with no evidence of leakage or corrosion. The ͮͰ-inch buried plug valves were not assessed because they could not be accessed. However, maintenance and operation staff assumed that their condition is similar to the visible valves.

Conversely, the forcemain isolation, discharge, and header plug valves within the pump station building were corroded and showed evidence of leakage at connections. These plug valves need significant maintenance or replacement.

Figure ͯ.ͯ Surge Tanks
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The cushioned swing, spring-loaded ͭͰ-inch check valves at each sewage pump had minor corrosion at the packing, Figure ͯ.Ͱ. Furthermore, the check valve at Pump No. ͭ showed signs of minor leakage at the swing arm and minor corrosion on the valve top. The check valve at Pump No. ͱ was noted as having excessive noise and vibration, which may be from the pump itself and not from the valve. The structural analysis recommended and described in Section Ͱ.ͮ.ͭͮ will provide additional information needed to identify the source Three of the four check valves on Pump Nos. ͮ, ͯ, and Ͱ were installed vertically, making maintenance difficult. The hoist in the pump room may help with valve removal and maintenance. The paint and supports were in good condition, with no signs of corrosion.

3.3.5 Seal Water System

3.3.5.1 Description
Installed in ͭ͵͵Ͳ, the seal water system, Figure ͯ.ͱ, supplies water to lubricate the pump seals and flush impurities.

3.3.5.2 Findings
While most components are functional and in good
condition, the system became obsolete after self-flushing mechanical seals were installed. The two alternating
pumps showed no sign of corrosion. However, leakage was observed even though the pumps are not in use. The
control valve had excessive corrosion.

3.3.6 Potable Water

3.3.6.1 Description
Installed in ͭ͵͵Ͳ, the potable water system consists of an air gap tank, Figure ͯ.Ͳ, a hydropneumatic tank, and an air compressor. Potable water is fed into the air gap tank, where water is drawn for sanitation and equipment washdown. The hydropneumatic tank contains water and pressurized air, supplied by the air compressor.

The hydropneumatic and air gap tanks serve to provide a supply of potable water at specified pressures without the potable water pump having to cycle on every time there is demand. When the seal water was in use, the system
provided water for the seal water pump

3.3.6.2 Findings
The potable water system was in good condition. Minor
corrosion was evident on the pressure switch and gauge, conduit fittings, and the solenoid valve flange bolts of the hydropneumatic tank. Similarly, the air gap tank had minor corrosion on the conduit but was in good condition overall. The anchorage should be checked for seismic.

Figure ͯ.ͱ Seal Water Components
Figure ͯ.Ͳ Hydropneumatic Tank
Figure ͯ.Ͱ Check Valve at
Pump No. ͭ
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The pressure gauge on the potable water tank was corroded on the outside with rust visible through the gauge's face. However, function does not seem to be impaired. Corrosion was noted on much of the support equipment and fittings.

3.3.7 Site Items

3.3.7.1 Description
A berm surrounding the pump station provides emergency storage. The building and the berm area provide a capacity of approximately ͭ million gallons in case of a spill. Once the overflow conditions have been remedied, a drain installed in the southwest corner of the site will divert excess flow back into the wet well.

3.3.7.2 Findings
The pump station compound is located in a remote location, making it attractive to vagrants.

Vandals had breached the fence and damaged the air gap tank, and trash was observed immediately outside the fence.

The site has limited means to prevent these incidents. It has no external means of monitoring or alarms indicating a site breach, and the security cameras on-site record locally for forensics purposes only.

The site is enclosed by a Ͳ-foot tall chain-link fence topped with barbed wire, Figure ͯ.ͳ. While in good condition, the fence was too short in some areas and could be overcome in other areas because of nearby trees or raised elevation outside of the pump station. The asphalt, including the driveway and area surrounding the pump station building, showed significant cracks and deterioration.

Buried piping could not be accessed, but staff reported no issues. The exterior lighting appeared to be in good
condition, with deterioration noted in the enclosures. The three ͮͱͬ-watt floodlights that illuminate the pump station compound were too small to provide adequate lighting, and staff mentioned that replacement lamps are hard to find.

3.3.8 Building

3.3.8.1 Description
The pump station building was erected in ͭ͵͵ͱ, and the roll-up door to the generator room was installed in ͭ͵͵ͱ. The chain hoist in the generator room has been on-site sinceͭ͵͵Ͳ.

3.3.8.2 Findings
The pump station building was in good condition. The assessment team did not observe concrete spalling, visible rebar, or excessive corrosion to structures or members. There was no indication of structural deformities or foundation settling.

A minor shrinkage crack was noted in the basement wall, and a larger crack was observed lining up with the concrete joint in the perpendicular wall. However, neither seems to be a structural issue. Random cracks in the plaster on the exterior building walls were non-structural in nature.

Due to pump station operations during the inspection, it was not possible to inspect the wet well.

Figure ͯ.ͳ Chain Link Fence
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The flood containment door was in poor condition and was visibly deformed around the edges, Figure ͯ.ʹ. Corrosion along the edges made it difficult to open, which raises concerns about whether it would seal properly to contain a spill in the motor level of the pump station.

Some of the wood beams in the roof covering the generator room had minor cracks. Intake fans pull in moisture-laden air, exposing part of the wood framing to moisture. As a result, mold was observed on a few pieces of wood. However, the wood had not deteriorated and was free from defects. Its support equipment was functional, and the paint was intact. The crane is used sparingly.

In the concrete roof slab, maintenance staff reported leaks. Both the wet well and dry well fans were corroded, and white residue was found on the concrete roof's ceiling, indicating possible roof leakage. Because of leakage at the floor level, the expansion joint between the concrete structure and concrete masonry units on the roof were likely compromised. The expansion joint behind the stair stringer on the roof was broken. Water is probably leaking through this broken joint to the floor below.

Lighting fixtures in the electrical, generator, pump, and motor rooms, as well as above the stairwell, were in good working condition with no issues noted. The center fixture above the stairwell has had burned-out bulbs, but this does not indicate that the fixture is damaged. One light in the pump room on the south wall had a burned out bulb. The lighting control panel was in good condition, with minor corrosion on the exterior of the panel board but very little corrosion on the transformer.

EWA staff noted that the exhaust fans seem to provide excessive ventilation. EWA staff and the assessment team did not, however, note excessive ventilation in other areas of the pump station.

3.3.9 Wet Well

3.3.9.1 Description
The wet well was constructed in ͭ͵͵ͱ. The wet well control panel was installed in ͭ͵͵Ͳ and refurbished in ͮͬͬͰ.

At the wet well, two ultrasonic level controls, with a bubbler control system as backup, provide level control. The bubbler system converts a pressure signal into an input signal to the PLC. The bubbler control panel is located in the motor room and has redundant, alternating compressors that share a receiver. The bubbler system was installed as original equipment in ͭ͵͵ͱ and was refurbished in ͮͬͬͱ.

For both the wet and dry wells, a gas/oxygen detector monitors the wet and dry well atmospheres to ensure worker safety in case entry is needed. This detector was installed in ͭ͵͵Ͳ and was rehabilitated in ͮͬͬʹ.

The sluice gate at the entrance of the wet well was installed as original equipment in ͭ͵͵ͱ. It was not evaluated since it is completely submerged; operations staff did not report issues.

Figure ͯ.ʹ Flood Containment
Door
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3.3.9.2 Findings
Although the wet well was in good condition, multiple cracks were found on the wet well's roof, Figure ͯ.͵ If left unrepaired, the cracks could lead to rebar corrosion. At the time of the assessment, no corrosion to structures or members, structural deformities, or signs of settling were noted. The PVC liner seemed to be intact with no signs of damage.

Because the wet well is difficult to assess thoroughly while the pump station is operational, the condition assessment was based on operator input and the site visit. There were no signs of corrosion on the wet well control panel. The bubbler control panel was also in good condition with no noted issues or signs of corrosion. The wet well exhaust ventilation stack had no noted issues. The equipment showed no signs of corrosion or damage. However, the light fixtures were severely corroded.

3.3.10 Flow Meters and Meter Vaults

3.3.10.1 Description
The Krohne ͮͰ-inch electromagnetic flow meters
were installed in ͮͬͭͯ, Figure ͯ.ͭͬ. The meter vaults
were constructed in ͮͬͭͯ.

3.3.10.2 Findings
The electromagnetic flow meters were in good
condition and were operating well. Minor corrosion
was noted along the flange of the pipe connected to
the flow meter.

No major cracks, visible deformities, or evidence of settling was found in the meter vaults. Both meter vaults had proper sumps in place.

A sump pump in each vault provided adequate drainage, but neither vault had a flood detection device. The sumps showed signs of groundwater infiltration between the concrete joints, which could cause the structure and members to corrode. Corrosion was visible along the aluminum beam near the vault hatch.

3.3.11 Variable Frequency Drives

3.3.11.1 Description
Because process demands vary, VFDs control the motor speed and pump speed based on flow conditions. The PLC sends a speed control signal to VFDs, which operate the pump motors accordingly. This ability to adjust motor speed based on real-time flow conditions reduces power consumption without affecting operations.

3.3.11.2 Findings
The Allen-Bradley VFDs on all four pumps were installed in ͭ͵͵ͱ and were rehabilitated in ͮͬͬ͵.

While they were in good condition, with no signs of corrosion or damage, they have become obsolete and are no longer supported by the manufacturer. Thus, they will be replaced under this project's design scope.

Figure ͯ.͵ Wet Well
Figure ͯ.ͭͬ Flow Meter and Vault
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Furthermore, there is no VFD bypass feature allowing the pumps to operate at a constant speed if a VFD fails. Replacement will include adding a new bypass feature.

3.3.12 Control Centers and Panels

3.3.12.1 Description
A PLC is a computer that interprets input from sensors and switches throughout the pump station and then sends outputs signals to power valves, VFDs, and other equipment. As noted in the previous section, the PLC also sends signals to the VFDs to control the pump speed.

In addition to the PLC, the facility has an Allen-Bradley pump control panel, which is original equipment installed in ͭ͵͵ͱ. The facility also has Allen-Bradley Motor Control Centers (MCCs).

MCC-ͭ and MCC-ͮ were installed in ͭ͵͵ͱ.M C C -ͭ supplies power to Pumps No. ͭ and No. ͮ, the power control transformer, and pump station auxiliary equipment. MCC-ͮ supplies power to Pumps No. Ͱ and No. ͱ.

The main tie breaker connects the MCCs for operation during power failure, when only one generator is available. The service entrance switchgear is a combination of electrical switches, fuses, and circuit breakers that meter and distribute incoming power.

3.3.12.2 Findings
The Allen-Bradley pump control panel showed no signs of corrosion or damage. The two Allen- Bradley ͱ/ͯͬ Processors on the panel are obsolete and are scheduled for replacement under the current project.

Minor corrosion was noted on MCC-ͭ. On both breakers, minor scratches and spots that do not interfere with functionality were observed. The main tie breaker was in good condition and showed no signs of damage or corrosion. The assessment team noted that the service entrance switchgear was severely corroded.

3.3.13 Emergency Generators

3.3.13.1 Description
Two ͳͱͬ kilowatt (kW) emergency generators were installed in ͭ͵͵Ͳ, Figure ͯ.ͭͭ. These generators provide power during a commercial power failure to maintain pump station
operations. Each generator can run three pumps
simultaneously.

An automatic transfer switch system switches to generator power. The three Asco Auto Transfer Switches (ATS) were installed in ͭ͵͵Ͱ.

ATS-ͭ is powered by Generator No. ͭ, and ATS-ͮ is powered by Generator No. ͮ. The third ATS is powered by whichever generator is started and has an energized load first and powers the priority load MCC-ͭ. A tie-breaker switch can be manually activated to interconnect the two MCC sections if the generator supplying the priority load fails.

Figure ͯ.ͭͭ Generator No. ͮ
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3.3.13.2 Findings
The two emergency generators were in good condition with no signs of damage or corrosion evident.

The contacts in the ATS were clean and well maintained, with no signs of corrosion. The switches had minor scratches and spots that do not interfere with functionality.

Encina personnel expressed concerns that the required monthly ATS and generator testing caused equipment and VFD failures. The VFD failure delayed the pumps coming back online, which flooded the wet well. This flooding has damaged wall-mounted electrical components, primarily light switches, in the wet well.

3.3.14 V & A Engineers, Inc. Condition Assessment

3.3.14.1 Description
On September ͵- ͭͭ, ͮͬͭͱ, and January ͭͮ, ͮͬͭͲ, V & A Consulting Engineers, Inc. visited the pump stations to conduct specialized testing of concrete and metal surfaces. V & A performed visual evaluations and non-destructive testing on concrete surfaces and structures, piping, motors, and pumps at the BVPS, the RPS, and the BCPS.

For the visual evaluations, V & A rated the condition of the surfaces based on the qualitative, objective criteria of the VANDA Metal and Concrete Condition Indices. They also used ultrasonic thickness testing to determine the pipe wall thickness. To perform this testing, they used a gauge that determines the thickness from sound waves at a specific location.

V & A performed ultrasonic thickness testing on the discharge riser, suction wall spool, and suction reducer for Pump Nos. ͭ, ͮ, Ͱ, and ͱ. They tested the header between Pump Nos. ͭ and ͮ, downstream of Pump Nos. ͭ and ͮ, and the spool upstream of the northwest forcemain penetration.

V & A also assessed the exposed ductile iron piping. Using a handheld pit depth gauge, they took depth measurements where pitting was visible. They also performed a vibration analysis on the motors and pumps at the BVPS and the BCPS using a four-channel data recorder and analyzer that monitors motor and vibration speeds.

V & A contracted with Reed Electric performed vibration testing on all four pumps and motors at the pump station while running at speeds near Ͳͱ percent and ͭͬͬ percent. During testing, the pump station was operational. Because of the limitations to a live station, data were collected at only the lower speed for some test points.

Using the Wenner Four-Electrode Method, V & A performed in-situ soil resistivity testing to determine how current travels in the soil. This testing indicates how corrosive the soil is to metal components. Typically, soils with low resistivity have higher corrosive properties.

V& A collected soil samples along the excess effluent line for corrosivity analysis, including pH and ion concentrations. For additional details on testing methods and equipment, refer to the full report in Appendix E.
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3.3.14.2 Findings
The dry well at the BVPS showed groundwater infiltration through the exterior walls. However, the concrete surfaces seemed to be in good condition with minor defects. Some areas of groundwater infiltration had staining, which indicates corrosion of the reinforcing steel. The edges of the grout pads under the pump bases also showed some deterioration.

Repairs from previous leaks seemed to be successful, with no additional leakage observed in those locations.

Coatings on metal equipment and piping were intact. However, at lower elevations, small chips were visible in the coating. Coating failures can lead to corrosion.

Corrosion was observed around check valve lever shafts and some covers, threaded tap on ͮͬ-inch discharge header from Pump Nos. ͭ and ͮ and the suction flange on Pump No. Ͱ. The bathroom drain plumbing was also corroded and showed signs of leakage.

Ventilation ducting flange at the blower was missing bolts and nuts and is out of alignment by approximately one half inch.

Built in ͮͬͭͯ, the meter vaults were in overall good condition with some issues. Both showed moderate to extensive groundwater infiltration, and the floors of both vaults were wet. The stains were rust colored and were noted at various elevations within the vaults. Because of the water's proximity to the creek and lagoon, the water is likely brackish and can promote corrosion of steel within concrete.

Coating on the ͮͰ-inch ductile iron forcemain was peeling, and corrosion was noted at the pipe penetration. This corrosion was likely associated with the groundwater infiltration in the vaults.

The assessment team did not see the waterstop ring with mechanical seals, which is indicated on the drawings. This ring would help seal the gap between the pipe and the sleeve. However, the team did note that the pipe appeared to be embedded directly into the concrete.

The flow meters were in good condition, but the copper grounding cables showed oxidation and corrosion at the cable connectors. The hold-down rods for the pipe supports did not have a rubber pad between the coated pipe surface and the rods for galvanic and vibration protection.

Although the pipe support saddles in both vaults were galvanized, they showed corrosion. This corrosion, as well as the spalling and corrosion on the concrete supports for the plug valves, was likely from standing water in the vaults. The concrete might not have enough depth of cover for the reinforcing steel.

The sump pump is functional. However, signs of corrosion were seen on the fittings and the outlet the sump pump plugs into.

Ultrasonic thickness testing revealed that wall thickness at all but one test location was within manufacturing tolerances. The ͮͬ-inch header pipe spool on the discharge header from Pump Nos. ͭ and ͮ showed a significant loss of ͬ.ͭͲͳ inches, which is ͯͳ percent of its nominal thickness, and shows signs of localized external corrosion. 05/13/2025 C9 434 of 1078
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The spool has a threaded tap that showed signs of heavy corrosion. The tap may be leaking, or its installation may have caused damage to the spools coating and lining. The results of the thickness testing are in Table Ͱ-ͭ in the full report, which is in Appendix E.

According to vibration testing, most vibration levels met ISO and Hydraulic Institute Standards, with highest readings found in the perpendicular direction on pumps and motors. Pump and Motor No. ͭ showed the lowest reading, and Pump and Motor No. ͮ showed a high peak at Ͳͱ percent speed. Motor No. Ͱ had unusual running speed harmonics in the upper bearing and had overall high readings. Motor and Pump No. ͱ showed some high frequency peaks indicating loose bearings, and the pump upper bearing showed signs of cavitation noise not observed in other pumps.

Because neither hydraulic noise nor VFD issues were noted, some of the higher frequency peaks may be due to residual resonance issues. The stiffening beams attached to the pumps are likely meant to reduce vibration and for seismic considerations.

3.4 Raceway Pump Station
The condition assessment at the RPS occurred on July ͮͯ, ͮͬͭͱ.

3.4.1 Sewage Grinder and Barscreen

3.4.1.1 Description
A Moyno channel grinder is on one side of an
approximately Ͱ-foot square channel, Figure ͯ.ͭͮ.

The channel is divided by a concrete wall and a
ͮ.Ͱͳ-foot tall weir to divert flow to the barscreen
during increased flow or grinder failure/removal.

3.4.1.2 Findings
The Moyno grinder has been removed from service
for at least a year, leaving only the barscreen to
prevent debris from entering the wet well. The
barscreen lets wipes and other debris travel through
the pump station intact, which poses a risk to
downstream equipment and requires labor-intensive manual cleaning. This debris also clogs the pumps and forcemain, requiring operators to back flush the system. The current configuration provides no redundancy and is inadequate for the pump station's needs.

3.4.2 Sewage Pumps

3.4.2.1 Description
The RPS has three ͳͱ-hp Fairbanks Morse submersible solids-handling sewage pumps, which are VFD driven. Each pump has a capacity of Ͳͱͬ gpm. All three pumps are original equipment from the pump station rebuild in ͮͬͬͳ.

Figure ͯ.ͭͮ Grinder and Barscreen Channel
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3.4.2.2 Findings
Although the submerged pumps cannot be inspected while the pump station is operational, the visible portions of the discharge piping and support equipment were in good condition and showed signs of only minor corrosion on the flanges. Each pump is pulled yearly for inspection, and one pump is rebuilt annually on a
rotating basis.

Without a sewage grinder in service, ragging
of the pumps has increased. Pump discharge
valves were in good condition and showed
no sign of leakage, Figure ͯ.ͭͯ. The valves
are exercised weekly and had no known
issues except minor corrosion. All support
equipment was present and in good
condition.

3.4.3 Site Items
The RPS is isolated in a canyon and has experienced at least three site breaches. In two cases, a hole was cut in the chain-link fence. The method of entry for the other breach is unknown.

During the breaches, the generator radiator was damaged when trespassers tried to steal the aluminum. With no external monitoring or alarms, the site breaches went undiscovered until personnel went on-site for routine purposes. Although mock security cameras had been installed, they were stolen at some point.

The ʹ-foot chain-link perimeter fence is in good condition but lacks additional security features, such as razor wire at the top, to deter trespassers, Figure ͯ.ͭͰ.

On the southern perimeter, the fence ends at the building wall. The building roof overhangs the fence, providing an easy means of access to trespassers.

Trees in close proximity to the fence also allow access over the fence. The access gate at the north end of the site is secured only with a padlock.

Exterior lighting is adequate for the facility, but two pole lights are not connected to the existing photoelectric sensor and are not activated automatically when it gets dark. One fixture on top of the building needs to be replaced, but all others are in good condition with no signs of corrosion or other defects on the fixtures or supports.

The asphalt along the access road and within the pump
station compound is in good condition. The
assessment team did not note any significant cracks or
deterioration.

The Rosemount pressure transmitter gauge is located
on the pump discharge manifold, Figure ͯ.ͭͱ. Minor
corrosion was noted on the manifold valves, but other
supports were in good condition. Critical indications
and alarms were functional. No parts were missing. If
Figure ͯ.ͭͯ Discharge Valve Pump No. ͯ
Figure ͯ.ͭͰ Fence
Figure ͯ.ͭͱ Pressure Transmitter Gauge
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parts are missing in the future, the equipment is currently supported by the manufacturer and replacement parts are available.

3.4.4 Building
Dust and debris entering the building has caused damage to electrical components. Fluffy, cotton-like material has been found within the electrical panels and are thought to have caused at least one VFD failure.

The louvered doors on the building do not provide an
adequate barrier and need to be replaced with solid
doors, Figure ͯ.ͭͲ. The ͭͮͬͬ CFM exhaust fan has minor
corrosion but is in good condition. Neither operators nor the assessment team noted excessive ventilation.

Because the joists on the wood roof were not pressure
treated, the plywood flaked from moisture-caused
shrinkage due to environmental exposure. Joists on the
building exterior walls have been painted for protection but are susceptible to deterioration in the future.

Double fluorescent lamp fixtures provide interior lighting. These fixtures were functional, in good condition, and provided adequate light. Emergency lights and all light switches were also functional. No corrosion was observed.

3.4.5 Emergency Overflow Storage Pond

3.4.5.1 Description
The emergency overflow storage pond onsite was designed for approximately ͭͱͬ,ͬͬͬ gallons of sewage overflow if pumping operations are interrupted due to power outage, equipment failure, or peak flows caused by system infiltration or storm events, Figure ͯ.ͭͳ.

3.4.5.2 Findings
During inspection, water was present in the basin,
most likely from groundwater infiltration. Large
cracks were visible in the concrete basin.

The emergency overflow flap gate that directs flow
from the wet well to the overflow basin had moderate
surficial corrosion and did not close or seal properly.

As a result, flow from the basin backed into the wet
well.

The overflow return plug valve that allows flow from
the basin back into the wet well was stuck in the closed position, preventing the pond from being drained back into the wet well. The curb around the perimeter of the overflow storage pond had significant cracks on the handrail posts.

Figure ͯ.ͭͲ Louvered Doors and Building
Figure ͯ.ͭͳ Overflow Storage Pond
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3.4.6 Odor Control Unit

3.4.6.1 Description
Odor is a normal byproduct of sewage conveyance. To
control odor at the RPS, an odor control scrubber system is used, Figure ͯ.ͭʹ. It consists of a small fan and two
prepackaged carbon towers.

3.4.6.2 Findings
The odor control scrubber system needs significant
maintenance. The carbon bed has not been replaced since it was installed in ͮͬͬͮ. The PVC piping was brittle and cracking, and the supports and bolts were rusting.

The alarms and critical indications were functional, and the unit is currently supported by the manufacturer, with replacement parts available as maintenance requires. The ͬ.Ͳʹ-hp radial fume exhaust fan showed no signs of corrosion.

3.4.7 Wet Well

3.4.7.1 Description
The wet well was constructed in ͮͬͬͳ, Figure ͯ.ͭ͵. Two sluice gates allow influent to enter the wet well from the grinder channel and the barscreen side. The wet well level setpoint is maintained through communication with a Siemens HydroRanger ͮͬͬ ultrasonic level transmitter.

3.4.7.2 Findings
Because much of the wet well was submerged during the site visit, the condition assessment was based observations of the unsubmerged portions of the wet well and operator input. From these observations, the wet well appeared to be in good condition, with no defects or bubbling in the PVC liner.

Operators stated the sluice gates, Figure ͯ.ͮͬ, seal well were in good condition but were difficult to open and tended to stick since they are exercised only annually.

Scum build-up in the wet well is a problem, and
operators have to remove to it with a high-pressure
hose. Maintenance personnel expressed a desire for
a better way to homogenize grease and scum build-
up, perhaps through a chopper pump or a spray-
down system designed for wet well use.

The transmitter was in good condition and fully
functional. However, it wasn't operating during the
site visit from high levels of foam in the wet well. No corrosion was observed.

Figure ͯ.ͭʹ Odor Control Unit
Figure ͯ.ͭ͵ Wet Well
Figure ͯ.ͮͬ Sluice Gates
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3.4.8 Flow Meter and Meter Vault

3.4.8.1 Description
A gravity drain to the wet well provides drainage from the meter vault. The transmitter for the Sparling TigerMag EP electromagnetic flow meter is located in the electrical room.

3.4.8.2 Findings
The meter vault was in good condition, Figure ͯ.ͮͭ. The flow meter and supports were also in good condition, with no signs of corrosion.

Critical indications and alarms were functional. The
flowmeter is currently supported by the manufacturer.

3.4.9 Variable Frequency Drives

3.4.9.1 Description
At the RPS are three Allen-Bradley Powerflex Variable Frequency Drives, one for each submersible pump motor. All VFDs were installed as original equipment in ͮͬͬͳ.

3.4.9.2 Findings
The VFDs were in good condition but showed signs of dust and debris infiltration in the housings.

According to operations staff, the dirty environment in the electrical room had caused VFD failure. Because of the failure, some of the VFDs had to be replaced and others repaired. The units are currently supported by the manufacturer, meaning replacement parts are available for maintenance.

Minor ultraviolet light degradation was noted on the FRP cable termination box of each VFD.

The VFDs showed no signs of corrosion.

3.4.10 Control Centers and Panels

3.4.10.1 Description
The Allen-Bradley CenterLine MCC,
Figure ͯ.ͮͮ, was installed at the pump station
in ͮͬͬͱ, before the site was rehabilitated. The
Allen-Bradley PLC was installed as original
equipment in ͮͬͬͳ.

Figure ͯ.ͮͭ Flow Meter and Vault
Figure ͯ.ͮͮ Motor Control Center
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3.4.10.2 Findings
The MCC was in good condition. The contacts were
clean and well maintained, and there were no signs of
corrosion. Replacement parts are available if needed.

Although no equipment or parts were missing, staff
noted that the MCC did not have a surge protection
device.

EWA personnel voiced concerns regarding the PLC's
functionality. The FlexLogix PLC, Figure ͯ.ͮͯ, does not allow for a redundant processor and had failed every
few months. These failures required the PLC to be
reset for EWA personnel to develop a method to
prevent data loss.

The inside of the housings for the PLC and MCC,
including the ventilation fans, were dirty from dust
and debris infiltrating the electrical room. The PLC is scheduled for replacement under the current project.

3.4.11 Emergency Generator

3.4.11.1 Description
The Kohler Power Systems emergency standby generator was installed in ͮͬͬͳ, Figure ͯ.ͮͰ. The GE Zenith Controls automatic transfer switch was installed in ͮͬͬͳ.A Ͱͬͬ gallon fuel tank provides a ͮͰ-hour supply of fuel on-site.

3.4.11.2 Findings
The emergency generator was in good condition, with
ͭͰͬ hours of runtime remaining on the Air Pollution
Control District (APCD) annual permit. No issues or
defects with the generator were observed. No corrosion
was noted on the generator or associated supports.

Replacement parts are readily available. EWA staff
noted that the required monthly generator testing has
disrupted pump operations and caused VFD shutdown.

The automatic transfer switch and supports were in good condition, with no visible corrosion.

The critical indication and alarms were functional, and the contacts were clean and well maintained. All equipment was present and parts were available for maintenance.

3.4.12 V & A Engineers, Inc. Condition Assessment

3.4.12.1 Description
V & A Engineers performed a condition assessment of the RPS on September ͭͭ, ͮͬͭͱ, using visual assessment and ultrasonic thickness testing. Ultrasonic thickness testing was performed at the discharge ground penetration, discharge horizontal spool, and discharge elbow of each pump and on the discharge header.

Figure ͯ.ͮͯ Programmable Logic Control
Figure ͯ.ͮͰ Emergency Generator
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3.4.12.2 Findings
The exterior surface of the exposed piping was in good condition, with no signs of corrosion. The coating was intact, except for a coating failure noted on the flange near the Pump No. ͯ discharge pipe. The failure caused moderate corrosion, rated VANDA Level ͯ. In addition, the electrical box and conduits near the pump piping had corrosion staining and cracks in the coating. The concrete was damaged at the base of the electrical box support.

The concrete storage reservoir exhibited significant infiltration/exfiltration at cracks and joints in the concrete. The concrete surfaces within the basin were in good condition, rated VANDA Level ͭ. However, the concrete curb surrounding the reservoir was cracked and damaged by spalling where the guardrail connects. The post was not coated with coal tar and a PVC sleeve to isolate it from the concrete, which caused large cracks.

Most of locations in which ultrasonic thickness testing was performed had wall thickness loss within manufacturing tolerances. Three locations showed losses outside the tolerance, with losses from ͭʹ percent to ͮͭ percent. However, these values represent minor variance from the manufacturing tolerances of ͬ.ͬͮʹ inches or less and were likely manufactured thicker than Class ͱͯ, as required by AWWA Cͭͭͱ. The pipes and fittings were in good condition, rated VANDA Level ͭ.

3.5 Buena Creek Pump Station Condition Assessment Findings The condition assessment at the BCPS took place on July ͮʹ, ͮͬͭͱ.

3.5.1 Sewage Grinders

3.5.1.1 Description
Solids are handled by two JWC Channel Monster Sewage Grinders running in parallel, with a spare grinder on the shelf for backup, Figure ͯ.ͮͱ. The grinders were both installed in ͮͬͬͮ and were rehabilitated between ͮͬͬͲ and ͮͬͬʹ. An Ingersoll-Rand air compressor provides pressurized air to the grinder hydraulic units.

3.5.1.2 Findings
The system performed well, and all accessory equipment was functional. The only concern reported was occasional damage at the base of the grinders from grit and rocks. If one or both grinders fail, flow will bypass the grinders over a weir to enter the wet well.

Because the sewage grinders are partially submerged,
assessment was based on operations and maintenance staff input and inspection of the equipment above the water elevation. All components and support equipment were present and functional, and replacement parts are available for maintenance.

Each channel grinder had its own hydraulic unit, which were both in good condition. Supports were in good condition, and no corrosion was noted.

The compressor was in good condition, with no sign of excessive corrosion on the compressor or supports.

Figure ͯ.ͮͱ Channel Monster Sewage
Grinders
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3.5.2 Sewage Pumps and Motors

3.5.2.1 Description
The pump station has five Cornell solids-handling sewage pumps that were installed in ͮͬͬͮ and were rehabilitated in ͮͬͬͳ, Figure ͯ.ͮͲ. The sewage pumps are powered by
Lincoln motors, installed in ͮͬͬͮ.

Operator preference is to run Pump Nos. Ͱ and ͱ, which
are inspected and rebuilt annually. The remaining three pumps are inspected annually and maintained as needed.

Due to the configuration, Pumps Nos. ͮ and ͯ air lock if they have been off-line, with air getting caught on the suction side.

3.5.2.2 Findings
The pumps were in good working condition, with only minor corrosion on the suction side of the diaphragm seal. They did not have excessive corrosion, leaks, vibration, or noise. Support equipment is present and in good condition. The paint was intact, but it did have minor chips and defects. The City and EWA staff expressed concerns that the current configuration is oversized for current flow conditions.

The contacts in the sewage pump were clean and well maintained, and all critical indications and alarms were functional. The motor supports were in good condition, with no missing parts.

3.5.3 Surge Tank

3.5.3.1 Description
The surge protection system was installed in ͮͬͬͮ, Figure ͯ.ͮͳ.

The compressor located in the motor room provides pressurized air.

3.5.3.2 Findings
The compressor was fully functional and in good condition. The tank and supports were also in good condition, with only minor corrosion on the valves. The tank and supports are inspected annually.

No sign of leakage was observed, and the paint was intact. Staff has reported concerns that the surge tank may be inadequately sized for the pump station.

Flow Science Incorporated performed a screening-level surge evaluation. This evaluation was done for three reasons: to determine potential pressure surge issues at the BCPS, to determine whether the existing surge tank is adequately sized, and to determine measures to mitigate pressure surge issues at the pump station and along the forcemain. Appendix F presents the full technical memorandum discussing this evaluation.

Figure ͯ.ͮͲ Sewage Pumps and Motors
Figure ͯ.ͮͳ Surge Tank
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In the evaluation, Flow Science determined that sources of pressure surges from both the BCPS and the RPS exist because the forcemain from the RPS connects to the BSD forcemain between BCPS and the gravity outfall. Pump power failure and startup, opening and closing of control and isolation valves, or a pipeline rupture could cause a pressure surge and water hammer.

The Buena Outfall has a system high point approximately ͭ,ͬͬͬ feet downstream of the pump station, with an elevation of Ͱͯͯ feet. The location is at SA ͮͰ+ͭͰ, and the pipeline is equipped with a ͯ-inch vacuum relief/air inlet valve. The pipeline is not fully pressurized from this high point to the gravity outfall, and open channel flow is predicted for this segment. However, pressure surges upstream will not likely affect the non-pressurized portion of the forcemain.

The forcemain between the pump station and the system high point is expected to be fully pressurized. Along this segment, the ʹ-inch RPS forcemain connects to the Encina forcemain approximately ͳ,ͬͬͬ feet downstream of BCPS.

To determine the impact of a pressure surge, several scenarios were evaluated. These scenarios are explained below.

The first scenario examined the effects of pump power failure and startup at the BCPS. Under this scenario, water hammer created by pump power failure would cause a significant pressure downsurge wave that, without surge protection, would propagate into the forcemain. The vapor pressure would likely cause extremely high localized pressure that could damage the forcemain between the pump station and high point. The vacuum pressures could cause the pipe to collapse.

The existing ͭ,ͬͬͬ gallon tank and ͭͮ-inch connection line are adequately sized to reduce the velocity in the forcemain and lessen the severity of a surge event. At the design flow of ʹ.ʹ mgd, the velocity in the ͭʹ-inch segment of forcemain is almost ʹ ft/sec and the pressure surge wave is approximately ͭ,ͯͬͬ fps. Based on this analysis, the surge tank volume is likely sufficient to provide protection.

The second scenario considered pump power failure and startup at the RPS. Under this scenario, due to the low flow rate at the RPS, a pressure surge event would not propagate into the BSD forcemain and affect BCPS. The surge could damage the RPS forcemain.

The third scenario assessed the impact of valve operations on surge potential. Opening a valve too quickly causes pipeline pressure upstream to drop, which can propagate upstream from the valve. Closing a valve too quickly causes a pressure increase on the upstream side of the valve, converting kinetic energy to pressure energy. This increased pressure causes a situation similar to pump power failure. Both conditions contribute to water hammer.

The fourth scenario considered the pressure downsurge wave created by a rupture along the forcemain. Under this scenario, the HGL would lower to the rupture site's elevation, propagating a pressure downsurge wave in both directions along the forcemain. The vacuum pressures in the forcemain could cause pipe collapse.
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3.5.3.3 Mitigation Measure
Steps can be taken during routine operation and maintenance to decrease the risk of surge pressure issues. Starting the BCPS pumps one at a time, and using the VFDs to slowly increase the speed, will reduce the potential of a pressure surge. To prevent damage to the RPS forcemain in the event of a pump power failure and startup, mitigation measures include installing vacuum relief valves or a small surge tank at Raceway. The same startup procedures as those recommended for the BCPS should be followed.

Adjusting the rate of valve motion to an appropriate speed can control the water hammer. The use of motor-operated valves helps prevent rapid valve motion. To prevent a pipe collapse which could result from a pressure downsurge wave due to pipeline rupture, vacuum relief valves should be installed along the forcemain to allow air into the pipeline. The air will increase the minimum pipeline pressures.

3.5.4 Pump Station Piping & Valves
Pump station effluent leaves the pump station
through the BSD's Encina forcemain. A second
forcemain then conveys flow to the abandoned
Shadowridge facility that is functional but not in
use. The forcemain lacks redundancy, and in the
case of pipeline failure, has no suitable backup to
handle flows. Pump Nos. ͮ and ͯ each have two
motor operated plug valves used to divert flow
to Shadowridge or Encina, as conditions dictate,
Figure ͯ.ͮʹ.

Operators reported that every forcemain valve leaked and needed to be replaced. The ͮͰ-inch forcemain plug valve had no signs of corrosion, but leakage was apparent.

Staff indicated that the valves for Pumps No. ͮ and ͯ
have reached the end of their useful lives and need to be replaced. Upon activation, the emergency shut off check valves close too slowly and need to be rehabilitated or replaced, Figure ͯ.ͮ͵. Overall, every valve appears to be approaching the end of its useful life.

Figure ͯ.ͮ͵ Check Valve
Figure ͯ.ͮʹ Motor Operated Valve
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3.5.5 Site Items

3.5.5.1 Description
The BCPS is in a remote location with heavy foot
traffic along the pedestrian path between the
compound and the nearby creek. The security
cameras at the
BCPS record
locally for
forensics
purposes but do
not stream video
for external monitoring. No external monitoring or alarms are present to trigger if the fence or building is breached. The site is enclosed by a Ͳ-foot chain-link fence topped with barbed wire, Figure ͯ.ͯͬ. The GE cabinet located on the slope at the southeast corner of the pump station houses an SDG&E meter, Figure ͯ.ͯͭ.

3.5.5.2 Findings
The existing fence and gates were in good condition but did not deter trespassers. The asphalt needs to be repaired because of extensive cracking.

The creek that runs along the north side of the pump station has no physical barrier to protect it from spills. Rather than flow toward the natural depression outside the fence line, flow can overflow at the adjacent manholes into the creek west of the pump station.

The GE cabinet housing had minor corrosion on the exterior but was otherwise in good condition. The cabinet can be accessed through a chain-link walking gate from outside the site.

However, access from within the site is challenging since the cabinet is at the top of an unimproved slope that shows signs of erosion.

3.5.6 Building

3.5.6.1 Description
The building's motor room has with seven ʹ-foot long, and one Ͱ foot long, wet location fluorescent light fixtures and two dual lamp emergency fixtures. The pump room has eight wall- mounted ʹ-foot long wet location fluorescent light fixtures.

The inlet vault is supplied by an ͭʹͬͬ CFM centrifugal roof supply fan with a ͭ hp motor. The vault is exhausted through the bio-filter odor control units associated radial flume exhauster, rated at ͮͬͬͬ CFM. The pump station main building is supplied by a roof-mounted centrifugal fan rated at ͱͬͬͬ CFM with a ͯ-hp motor through a supply air duct from the roof to the pump room.

Figure ͯ.ͯͬ Fence and Asphalt
Figure ͯ.ͯͭ GE Cabinet Lacks
Access
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The pump room and motor room have separate exhaust fans on the roof. Each room is exhausted by an identical roof-mounted centrifugal exhaust fan rated ͱͬͬͬ CFM with a ͭ.ͱ hp motor.

3.5.6.2 Findings
Although the building was structurally sound, there were existing leaks and evidence of past leaks inside the pump room. Groundwater cascaded steadily down the west wall penetration near the mechanical duct, and pump station staff and condition assessment inspectors could not determine the source, Figure ͯ.ͯͮ. Signs of past leaks that were resolved were evident at the bottom of the north wall adjacent to the wet well and at the bottom of the east and south walls. An area near the stairs on the south wall had been successfully patched with plaster concrete during the first year of construction. Small hairline cracks on the walls appeared to be minor, non-structural cracks. There was also a crack in the overhead slab at the southwest corner of the pump room.

Interior and exterior lighting were adequate for the pump station, with no reported or observed issues. On the west side of the building are two dual head motion-sensor floodlights, which Encina maintenance staff had scheduled for replacement. The four light fixtures on the east side of the building, which are wall-mounted low-pressure sodium lamps, were in good condition.

Corrosion was not noted on the fixtures or supports.

EWA staff noted that exhaust fans over-ventilate the facility. The rest room has a small exhaust fan, rated at ͭͱͬ CFM that discharges through a vent to the roof and sufficiently ventilates the room. All supply and exhaust fans accessible for assessments were in good condition, with only minor surface defects and minimal corrosion noted.

3.5.7 Emergency Overflow Storage Basin

3.5.7.1 Description
The abandoned Shadowridge pump vault provides
emergency overflow storage, Figure ͯ.ͯͯ. The
unlined concrete vault has a capacity of
ͱͬ,ͬͬͬ gallons and contains a small sump pump to
return water to the wet well. If needed, a natural
depression to the west of the site can be used for
additional storage.

3.5.7.2 Findings
The vault and associated equipment were in good condition with no reported or visible issues.

The concrete showed no spalling or visible rebar, and no excessive corrosion was noted. No major cracks, settling, deformation, or leakage was evident.

The return pump was in good condition with no observed or reported issues. The pump panel was also in good condition. However, the pilot lights on the pump control panel need to be replaced. Corrosion was not observed, and the supports were in good condition.

Figure ͯ.ͯͮ Leak Visible on Concrete
Wall
Figure ͯ.ͯͯ Emergency Storage Vault
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3.5.8 Odor Control Bio-Filter Unit

3.5.8.1 Description
The unit houses bark material that was installed in ͮͬͬʹ and has never been replaced. The exhaust fan pulls air from the wet well and pump room for treatment in the biofilter.

3.5.8.2 Findings
The biofilter odor control unit functions properly, but the housing requires significant maintenance, Figure ͯ.ͯͰ. The fiberglass showed surficial cracks, and minor corrosion was on the base. The fans and ducting were in good condition.

The exhaust fan was in good condition with no evident issues. The odor control blower control panel was also in good condition.

However, the pilot lights need to be replaced. Although the panel and supports were not excessively corroded, parts are available for maintenance if needed.

3.5.9 Wet Well

3.5.9.1 Description
Flow enters the pump station from two influent
pipelines and travels through the channel grinders
into the wet well, Figure ͯ.ͯͱ. The wet well is divided into two sections that can be isolated with a slide gate in the dividing wall. The existing slide gates and sluice gate are manually operated. This division makes
maintenance easier, since cleaning or repairs can
happen while the pump station is operational. Pump
Nos. ͭ and ͮ pull flow from the west wet well, and the
remaining pumps pull from the east wet well. The
lighting in the wet well was upgraded in CIP ʹͮͱ͵.

Wet well level is controlled by data relayed from one of four level sensors. Each wet well has one pressure transducer sensor and one ultrasonic sensor for redundancy. One is the designated primary sensor in each wet well, with the second sensors serving as backup in case of failure.

3.5.9.2 Findings
The wet well requires significant rehabilitation. The entire wet well could not be observed, since the pump station was operational at the time of the site visit. Although concrete was not visible during inspection, the PVC liner is known to be failing and will be replaced as part of this project during station bypass with the VFD/PLC replacement.

The stainless steel slide gates at the entrance to the wet well appeared to be in good condition.

However, staff reported damage to the seals. The sluice gate that divides the wet well was also damaged, preventing the two sides of the wet well from being isolated for bypass pumping for work and maintenance. The seals, stop logs, and liner are scheduled for as part of this project during station bypass with the VFD/PLC replacement.

Figure ͯ.ͯͱ Wet Well
Figure ͯ.ͯͰ Odor Control Unit
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Operators expressed concerns with grease building up in the far ends of the wet well, requiring them to pump down the level and use a firehose to break it up. The two dry well sump pumps were both in good condition with only minor defects observed and no operational issues noted.

3.5.10 Flow Meters and Gas Analyzer
The ͭͰ-inch flow meter on the Encina forcemain was installed in ͮͬͬͮ and was in good condition during the assessment, with no sign of excessive corrosion, Figure ͯ.ͯͲ. The Shadowridge forcemain flow meter was in good condition, even though the facility is not in use.

Critical indications and alarms were functional. Supports were in good condition, and there were no signs of excessive corrosion.

Encina staff expressed a preference to have the flow meter displays moved from their current location inside the PLC cabinet so the PLC
can be locked.

The gas analyzer, Figure ͯ.ͯͳ, provides data for
conditions in the wet well and pump room using a
three-way valve to switch between the samples. The
gas analyzers were upgraded in CIP ʹͮͱ͵ and were in
good condition during the assessment, with no
observed or reported issues.

3.5.11 Variable Frequency Drives
The Allen-Bradley VFDs for all five pumps were installed in ͮͬͬͮ and are obsolete. The VFDs will be replaced in ͮͬͭͲ for this project.

3.5.12 Control Centers and Panels
The Allen-Bradley Programmable Logic controller was installed in ͮͬͬͮ but is now obsolete and scheduled for replacement in ͮͬͭͲ for a current project, Figure ͯ.ͯʹ. Encina personnel expressed a desire for installing a hard-wired data link between the PLC and
flow meter so the flow meter display can be
moved from the PLC cabinet.

The Allen-Bradley Centerline motor control
panel was installed in ͮͬͬͮ and was in good
condition during the assessment, Figure ͯ.ͯ͵.

The supports were in good condition and no issues were noted with the functionality of alarms.

Figure ͯ.ͯͲ Encina Forcemain ͭͰ” Flow Meter
Figure ͯ.ͯͳ Gas Analyzer
Figure ͯ.ͯʹ Programmable Logic
Controller
Figure ͯ.ͯ͵ Motor
Control Center
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3.5.13 Crane
The Wallace Products A-frame ͮ ton crane has a ͭͬ-foot span to fit across the hatches in the floor of the motor room. The attached Coffey hoist enables staff to pull sewage pumps from the pump room to the motor room for maintenance.

The crane is located in the motor room and was in good condition. The paint had minor defects and surface scratches but no signs of corrosion.

3.5.14 Emergency Generator

3.5.14.1 Description
The ͱͬͬ-kW Kohler Power Systems Emergency
Generator was installed in ͮͬͬͮ, Figure ͯ.Ͱͬ.

The generator serves as backup power to the
pump station during commercial power failure.

The generator can run three pumps at maximum
speed.

The Allen-Bradley ATS was installed in ͮͬͬͮ and
was refurbished in ͮͬͬͳ.T h e A T S s w i t c h e s
power automatically during a commercial power failure.

3.5.14.2 Findings
The generator was in good condition. Minor corrosion was noted on exhaust silencers, but it did not affect operations. The supports were in good condition, and parts are available for maintenance. Alarms and critical indications were functional, and contacts were clean and well maintained.

No issues were noted by the EWA staff or the assessment team. No components had excessive corrosion. The switch is currently supported by the manufacturer.

3.5.15 V & A Engineers, Inc. Condition Assessment
V & A evaluated the BCPS on September ͭͬ, ͮͬͭͱ, using visual assessment, ultrasonic thickness testing, and vibration testing. On January ͭͮ, ͮͬͭͲ, V & A performed in-situ soil resistivity analysis, soil sampling at the pump station and along the downstream pipelines, and corrosivity testing of the soil along the excess effluent and forcemain pipelines. In-situ soil resistivity testing included an investigation into foreign utilities and soil sample analysis. Visual assessment of the dry well and concrete surfaces was also performed.

The dry well and concrete surfaces were in good condition with minor cracks noted. Some cracks showed evidence of groundwater leakage, mostly on the south wall. However, they did not have the staining indicating corrosion on the reinforcing steel.

The pump room had an active leak on the west wall from behind a ventilation duct. Neither the discharge piping nor the pump system was the source. The source may be the potable water supply line to the bathroom upstairs.

A ͭ-inch copper pipe that extends from the floor to the ceiling near the active leak was corroded at the tee fitting. Minor corrosion staining and coating failure were observed on Pump No. ͯ support pedestal, Pump No. Ͱ discharge piping support, and the flange bolt on Pump No. ͯ. The Figure ͯ.Ͱͬ Emergency Generator
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majority of the coating on metal piping and equipment was intact, with minor chips and delamination observed. None of the chips or delamination had resulted in corrosion.

Suction piping for Pump Nos. ͮ, ͯ, Ͱ, and ͱ had stains from prior leaks on the wall at the pipe penetration. There were no active leaks. All but one of the five galvanized pump discharge pipe support brackets provided only minimal support because they were loose. The fourth support from the west wall rattled during operation, damaging the coating.

The motors and pumps were mounted in an inverted pendulum arrangement that appeared to be a significant issue in terms of seismic loading. The large heavy motors were supported only by the discharge and suction flanges. In an earthquake, a large moment could result at the pump flanges, causing the motor to tip over if the mounting points aren't strong enough to resist the moment. Although seismic and structural issues were not included in the condition assessment, V & A did note this this issue.

V & A took ultrasonic thickness measurements at the following locations: the upstream and downstream suction for each pump, the discharge of Pump Nos. Ͱ and ͱ, the lower header between them, a surge tank riser, upstream and downstream of the Shadowridge flow meter, the Encina flow meter bypass, the Encina forcemain along the west wall, and the lower headers between Pump Nos. ͭ and ͮ, ͮ and ͯ, ͯ and Ͱ and the lower header west of Pump ͭ. All but four locations were within manufacturing tolerances. Locations outside of the tolerances had a maximum of ͭ͵ percent wall thickness loss, representing a variance of ͬ.ͬͭͰ inches.

Reed Electric attempted vibration testing on all five motors and pumps. However, Pump No. ͯ was not operational due to either VFD or electrical issues. Testing occurred while pumps were running between ͳʹ and ʹͳ percent, because of system control limitations and high cavitation vibration observed at lower loads.

The vibration levels were high on most test locations, with many exceeding ISO and Hydraulic Institute standards for operating levels. High readings occurred primarily in the in-line direction of the pumps and motors, with the highest reading in the pumps' lower bearing area. Reed Electric speculated that the severity of the vibration was from the stiffness of the pipe and the pump supports, since no excessive hydraulic noise or VFD issues were present.

In-situ soil resistivity testing was performed along the excess effluent and forcemain alignments.

Most of the tested soils have moderate to high corrosion, with some areas of very high corrosivity. These readings mean that metal pipes and fittings in this soil environment will likely corrode. The complete list of results is available in the full report in Appendix E.

The foreign utility investigation found a pipeline on Faraday Avenue that is cathodically protected with a galvanic system. The ͭͲ-inch concrete mortar-lined, tape-wrapped pipeline is part of the Olivenhain Water District. The current output is low and the galvanic system is not considered an interference risk.

Soil samples were obtained from three locations along the excess effluent line, one near the pump station along the creek, one near the middle of the alignment at a point near the RPS, and one close to the gravity outfall at El Camino Real. The laboratory results showed that all three samples were from high to moderately corrosive soil environments. The location nearest the 05/13/2025 C9 450 of 1078
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gravity outfall had higher chloride concentrations and is designated the most corrosive of the sites tested.

3.6 Risk Assessment
Capital improvement planning for rehabilitation and replacement activities is based on lowering the risk exposure of the City's pump stations. The magnitude of the City's risk from each asset at is estimated and quantified from the product of two metrics: vulnerability and criticality.

Vulnerability, defined as the possibility of failure, is based on asset condition and performance.

Criticality is as the consequence of failure.

Because of the pump station condition assessments, and considering asset criticalities, Carollo and the City collaborated to make risk determinations. The resulting risk scores, according to each asset, are automatically calculated in Carollo’s asset list. The following sections describe the variables used to assess risk and the approach used to determine final scoring.

3.6.1 Original Useful Life
The Original Useful Life (OUL) of an asset represents the amount of time it is estimated to function properly under standard maintenance before becoming unserviceable. The estimated lives of each asset were based on technical experience and industry trends and were subject to City review to account for possible trending equipment deficiencies throughout the plant.

Table ͯ.Ͱ shows the OULs used in the risk assessment. The OULs were used in conjunction with the condition scores to produce an evaluated remaining useful life for each component, resulting in a projected replacement year and vulnerability rating for each component.

Table ͯ.Ͱ Original Useful Life
Category Original Useful Life
Chemical Equipment ͭͱ
Civil/Site work ͱͬ
Electrical ͯͬ
HVAC ͭͱ
Instrumentation ͭͬ
Mechanical ͮͬ
Pump - Wastewater ͭͱ
Structural - Concrete ͱͬ
Structural - Fiberglass ͮͱ
Structural - Plastic ͭͬ
Structural - Steel ͮͱ
Valve ͭͱ
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3.6.2 Remaining and Evaluated Remaining Useful Life Estimates The Remaining Useful Life Estimate (RUL) is a straight line calculation of the years remaining based on the installation date, original useful life, and the current year. A separate estimate, called the evaluated remaining useful life (EvRUL) is calculated for each component based on the OUL and the condition scores. The EvRUL ignores the original installation date of the asset, and is calculated according to the following:

EvRUL = Condition Fraction x Original Useful Life
The Condition Fraction is based on the condition score, as shown in Table ͯ.ͱ. For example, if a pump installed in ͮͬͬͬ has an OUL of ͮͬ years and was given a condition score of “ͯ,” it would have a straight RUL Ͱ years as opposed to a calculated EvRUL of ͭͮ years. The EvRUL is typically a more representative estimate of the true remaining useful life of an asset, as it is based on the current observed condition of the asset, and recognizes that most assets will outlive their original useful life with proper maintenance.

Table ͯ.ͱ Condition Fractions
Condition Rating Condition Fraction
ͭ ͭ
ͮͬ .ʹ
ͯ ͬ.Ͳ
Ͱͬ .Ͱ
ͱ ͬ.ͭ

3.6.3 Vulnerability Assessment
An asset's vulnerability is ten times the inverse of the evaluated RUL. The inverse is multiplied by ten to bring the vulnerability rating to a ten-point scale to match the same ten-point scale used in the criticality assessment.

3.6.4 Criticality Assessment
An asset's criticality is necessary for evaluating the consequence of asset failure throughout the facility. Four criticality categories were selected for the pump station assets. Table ͯ.Ͳ presents the criticality matrix used to rate each asset.
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Table ͯ.Ͳ Criticality Matrix
Criticality Ranking Scale
Criticality Category Weight Description Rating
Health and Safety of
Public and Employees ͮͬ%
No injuries or adverse health effects ͭ
No lost-time injuries or medical attention Ͱ
Lost-time injury or medical attention ͳ
Potential for loss of life ͭͬ
Financial Impact ͭͱ%
Absorbed within budget line item (ζ ͈ͱ,ͬͬͬ) ͭ
Requires Purchasing Agent approval (͈ͱ,ͬͬͬ to ͈ͱͬ,ͬͬͬ) Ͱ Requires General Manager approval (͈ͱͬ,ͬͬͬ to
͈ͭͱͬ,ͬͬͬ) ͳ
Requires Board approval, new borrowing, or impacts rates (η ͈ͭͱͬ,ͬͬͬ) ͭͬ
Impact on
Environment or
Regulatory
Compliance
Ͱͬ%
ͭͬͬ% compliance with permits & no impact on
environment ͭ
Violation but no enforcement action &/or minor impact
on environment Ͱ
Violation with minor enforcement action &/or moderate
impact on environment ͳ
Enforcement action with fines &/or major impact on
environment ͭͬ
Effect on Service to
Customers ͮͱ%
No impacts on service delivery; Redundant asset available or service restored in ζ ͮ hours ͭ
Minor disruption; Service restored in ͮ to ʹ hours Ͱ
Short-term impact and/or substantial disruption; Service restored in ʹ to ͮͰ hours ͳ
Long-term impact and/or area-wide disruption; Not able
to restore service for η ͮͰ hours ͭͬ
Based on the criticality assessment, assets of most critical importance are the sewage pumps and motors, emergency generators, and the wet wells at all locations. Additional critical assets include surge tanks, VFDs, MCCs, sewage grinders, and forcemain valves.

3.6.5 Risk Assessment
The risk of asset failure considers the criticality, condition, and remaining life of each asset. The risk can help prioritize the need for asset rehabilitation or replacement. Risk is calculated as:

Risk = Vulnerability x Criticality
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Assets are grouped together by pump station to form larger projects that can then be compared to other CIP projects to determine budgeting and implementation needs. These assets are shown in Table ͯ.ͳ, Table ͯ.ʹ, and Table ͯ.͵ and listed according to assessed risk. CIP projects, which include additional assets not listed in the following tables, are identified in Section Ͱ and ranked in Section ͱ.

Table ͯ.ͳ Buena Vista Pump Station Priority Assets to Consider for Replacement or Rehabilitation Component Name Condition
Assessed
Risk
ͮͬͭͱ
Replacement
Cost Project Comments
Flood Containment
Door ͱ ͮͮ.ͮͱ ͈ͭ͵,ͬͬͬ Replace
Corrosion may prevent
door from sealing to
contain a spill.

Sewage Pump No. ͱͯ ͳ .ͮʹ ͈ͮͱ ,ͬͬͬ Rehab
Rehabilitation due to
excessive noise noted
during site visit.

Wet Well Lights ͱ Ͳ.Ͳͳ ͈ͭͳ,ͬͬͬ Replace Replacing fixtures due to corrosion.

Grinder Improvements ͯͯ .ͳʹ ͈ͮ ,ͯͭͮ,ͬͬͬ Replace
Inadequate for pump
station needs. Replace
with dual redundant
channel grinders in new
concrete channel.

Forcemain Plug Valves ͯ ͯ.ͳʹ ͈ͭ͵ͬ,ͬͬͬ Replace
Corrosion and leakage
on all forcemain plug
valves.

Sewage Pumps ͮͱ .ͰͲ ͈ͱͲͬ ,ͬͬͬ Replace Replacement in ͱ-ͭͬ years
Fence Ͱ ͮ.Ͱͮ ͈ʹͭ,ͬͬͬ Replace
Fence inadequate to
deter site breaches.

Replace with ʹ-ft candy
cane style security fence
and gates.

Asphalt ͯͮ .ͮʹ ͈Ͳͬ ,ͬͬͬ Rehab
Resurface existing
asphalt to remediate
cracks and deterioration.

Hydropneumatic Tank ͯ ͭ.͵ͳ ͈ͳͬ,ͬͬͬ Remove
Age and Condition.

Replace with backflow
preventer.
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Table ͯ.ͳ Buena Vista Pump Station Priority Assets to Consider for Replacement or Rehabilitation (Cont.) Component Name Condition
Assessed
Risk
ͮͬͭͱ
Replacement
Cost Project Comments
Wet Well ͮ ͭ.Ͱͭ ͈Ͳͯʹ,ͬͬͬ Rehab
Age and Condition. Repair
cracks and defects in
concrete. Replace wet well
coating. Requires bypass
pumping.

Meter Vaults A & B ͯͭ .ͭͯ ͈͵ ,ͬͬͬ Rehab
Joint repair to remediate
groundwater infiltration in
vaults.

Roof ͮ ͬ.ʹ͵ ͈Ͱͬ,ͬͬͬ Rehab
Age and Condition. Replace
tile roof, install membrane
roof over concrete barrel
roof.

TOTAL ͈Ͱ,ͬͮͭ,ͬͬͬ
Table ͯ.ʹ Raceway Pump Station Priority Assets to Consider for Replacement or Rehabilitation Component
Name Condition
Assessed
Risk
ͮͬͭͱ
Replacement
Cost Project Comments
Sewage Pumps ͮ ͱ.ͰͲ ͈ͭͳͬ,ͬͬͬ Replace Replace near end of useful life, approx. ͵ years
Overflow Flap
Gate ͰͰ .Ͱͮ ͈ͭͱ ,ͬͬͬ Replace
Emergency overflow flap gate
not sealing properly, allowing
backflow from storage pond to
wet well. Replace gate.

Odor Control Unit ͯ ͮ.ͮͭ ͈ͮ͵,ͬͬͬ Replace Age and condition. Replace with new odor control unit.

Overflow Storage
Pond Ͱͭ .ͳͬ ͈ͭʹͳ ,ͬͬͬ Rehab
Groundwater infiltration.

Apply epoxy/polyurethane
coating. Replace concrete curb
and handrail, and overflow
return plug valve.

Fence ͯ ͭ.Ͱͱ ͈Ͳͮ,ͬͬͬ Replace
Fence inadequate to deter site
breaches. Replace with ʹ ft
candy-cane style security
fence and gates.

TOTAL ͈ͰͲͯ,ͬͬͬ
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Table ͯ.͵ Buena Creek Pump Station Priority Assets to Consider for Replacement or Rehabilitation Component Name Condition
Assessed
Risk
ͮͬͭͱ
Replacement
Cost Project Comments
Motor-operated
Discharge Valves /
Forcemain Plug
Valves
ͱ / ͱ ͮͮ.Ͳͳ /
ͭͳ.Ͳͳ ͈ͮͯͯ,ͬͬͬ Replace Replace due to leakage and
corrosion.

Asphalt ͱͭ ͯ .Ͳͳ ͈Ͱ͵ ,ͬͬͬ Rehab
Resurface existing asphalt to
remediate cracks and
deterioration.

Wet Well Ͱ ͱ.Ͳͱ ͈ͱͲͬ,ͬͬͬ Rehab
Wet well liner, seals on slide
gates and sluice gate, and
stop logs scheduled for
replacement in ͮͬͭͲ as part
of current project.

Sewage Pumps ͮͱ .ͰͲ ͈ͰͲ ,ͱͬͬ Rehab Rehab all pumps within ͱ years
Odor Control Unit ͯ ͮ.Ͳͱ ͈Ͳ,ͬͬͬ Rehab
Rehab to prevent further
deterioration. Patch and
paint the fiberglass housing.

Fence ͯͰ .Ͱͱ ͈ͲͲ ,ͬͬͬ Replace
Fence inadequate to deter
site breaches. Replace with ʹ
ft candy-cane style security
fence and gates.

Pressure Surge
Improvements --- --- ͈ͳͰͬ,ͬͬͬ Replace
Replace existing surge tank
with larger tank install air
relief valves.

TOTAL ͈ͭ,ͳͬͬ,ͱͬͬ
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Chapter 4

CAPITAL IMPROVEMENT PROJECTS
This section develops the scope and cost for potential projects included in the CIP. Projects were identified based on the condition assessment results and on discussions with City personnel.

Project alternatives are evaluated where needed.

Project cost estimates were determined according to the presented scope. The cost estimate worksheets are presented in Appendices G, H, and I, separated by pump station.

4.1 Studies and Assessments

4.1.1 SCADA Communication Improvement Study
Each station has limited signals at the EWPCF control room where operations are monitored.

Most signals are monitor or alarm only and cannot adjust pump station operations. By upgrading the SCADA communications, additional control functions could be implemented at the EWPCF.

Incorporating video streaming would allow cameras to be installed at each site to increase security. A larger bandwidth will be required for video surveillance monitoring.

4.1.2 SCADA Master Plan
To identify the needs of and the best approach to improving SCADA communication between the EWA and the pump stations, a Pump Station SCADA Master Plan is recommended. The study should include a needs assessment and a risk assessment and should make specific recommendations for installing security equipment as identified in the Security Features Study described in the next section. Potential security equipment could include building perimeter security fencing, securing lighting with motion sensors, adding motion sensing surveillance cameras, and adding intrusion switches on doors and entrance gates.

The study should also address how the security equipment will be monitored, such as whether it should be monitored by the process control system and returned to the EWA SCADA system, or whether it should be a stand-alone security monitoring system. If a stand-alone security monitoring system is preferred, a decision will need to be made on whether to have EWA personnel monitor the system or to involve a third-party security company for monitor and alarm. If security cameras are included, the study should address the system architecture, such as the camera type and video data storage locations.

Additionally, depending on the amount of information needed for remote monitoring, and especially if video transmission to EWA is desired, the study will need to address the communication bandwidth required for each site. It will also need to identify options for upgrades, such as installing fiber optic cable to each site, using a third-party cellular service, or using spread spectrum radio transmission. The current existing communication links to the remote sites do not sufficiently transmit large amounts of surveillance video data. 05/13/2025 C9 457 of 1078
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The study cost estimate is provided in Table Ͱ.ͭ.

Table Ͱ.ͭ SCADA Communication Improvement Study Cost Estimate Item Cost Estimate
SCADA Study ͈ͳͱ,ͬͬͬ
Total Estimated Project Cost ͈ͳͱ,ͬͬͬ

4.1.3 Security Features Study
A Security Master Plan is recommended to fully document the security needs at each site. To address any identified issues, the study should include a needs assessment and risk assessment, as well as a summary of best practices and site-specific recommendations for physical, electronic, and operational security improvements. The study should also make recommendations based on risk to maximize the value of the improvements.

Although there are no published guidelines for security at wastewater treatment facilities and pump stations, "best practices" are available from several sources. These sources include the Environmental Protection Agency (EPA), American Society of Civil Engineers (ASCE), and American Water Works Association (AWWA). These sources should be utilized to create a security plan for the three pump stations.

Fencing improvements recommended for each site are addressed in subsequent project descriptions. However, they represent only a first step toward the necessary overall security enhancements.

In addition to fence improvements, a surveillance video monitoring system that encompasses buildings, perimeters, and all other critical assets, access point monitoring and alarms, and perimeter and gate alarms should be investigated.

Alarms and surveillance monitoring should display on the EWA SCADA for remote monitoring and response. To enhance safety and security at the pump stations, an intrusion response plan and operation policies and procedures supporting security are needed.

Table Ͱ.ͮ provides the cost estimate for the security features.

Table Ͱ.ͮ Security Features Study Cost Estimate
Item Cost Estimate
Security Features Study ͈ͱͬ,ͬͬͬ
Allowance for Improvements ͈ͯͬͬ,ͬͬͬ
Total Estimated Project Cost ͈ͯͱͬ,ͬͬͬ

4.1.4 ATS and Generator Testing Improvements Study
Scheduling VFD replacement at the BVPS may resolve the damage caused by monthly ATS and generator testing. Regardless, further investigation into the best resolution is recommended for the RPS where VFD replacement is not scheduled. If VFD replacement does not resolve the issue at the BVPS, further investigation is warranted there as well. 05/13/2025 C9 458 of 1078
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Items to investigate include programming, standard operating procedures, and equipment failures. Solutions to explore include incorporating a larger uninterruptible power supply (UPS) and/or programming the VFD to reduce the delay of pumps coming back online. Table Ͱ.ͯ provides the cost estimate for these studies.

Table Ͱ.ͯ ATS and Generator Testing Study Cost Estimate Item Cost Estimate
BVPS Generator Testing Assessment ͈ͯͬ,ͬͬͬ
RPS Generator Testing Assessment ͈ͯͬ,ͬͬͬ
Total Estimated Project Cost ͈Ͳͬ,ͬͬͬ

4.1.5 Assessment of Original Forcemain over Creek
The R-CAMP® Report recommended assessing the BVPS discharge forcemain to determine whether repairs or maintenance are required to ensure full redundancy of the forcemain. That recommendation is carried forward in this report. Table Ͱ.Ͱ provides the project cost estimate for forcemain assessment.

Table Ͱ.Ͱ Forcemain Creek Section Assessment Cost Estimate Item Cost Estimate
Forcemain Assessment ͈ͱͬ,ͬͬͬ
Total Estimated Project Cost ͈ͱͬ,ͬͬͬ

4.1.6 Pressure Surge Analysis
The screening-level surge evaluation performed by Flow Science determined possible mitigation steps for preventing pressure surge issues at the BCPS. This surge level evaluation provided recommendations for reducing the risk of damage caused by water hammer during a pressure surge. According to the evaluation, a pressure surge event at the pump station would not propagate into the Encina forcemain and would not affect the other facilities. This is due to the low flow rate at the RPS. The surge could, however, damage the RPS forcemain and structures, and the site may not be equipped to handle a surge event.

Operational measures recommended for reducing the risk of a pressure surge include starting the pumps one at a time, using the VFDs to slowly increase the speed, and using motor operated valves to control the speed activating the valves.

Possible mitigation measures at the BCPS include installing a Ͱ inch vacuum relief valve on the vertical inflection point of the BSD forcemain at STA ͮ͵+ͳͰ, which has an elevation of ͯ͵ͯ feet.

To ensure the valve is operational at all times, the valve should have controlled venting, full redundancy, and a maintenance program. This location does have a ͯ-inch combination air valve, which may be sufficient to mitigate water hammer in the line.

Another way to protect the pipeline from rupturing along the forcemain is to install vacuum relief valves along the forcemain between the BCPS and the vertical inflection point. These valves would let air into the pipeline to increase the minimum pipeline pressures. 05/13/2025 C9 459 of 1078
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Other mitigation measures involve installing new or additional vacuum relief valves or a small surge tank at the RPS. However, without a pressure surge analysis, specific recommendations for equipment cannot be made.

Thus, a pressure surge analysis is recommended for the BCPS and the RPS to determine whether pressures resulting from pump power failure require mitigation and, if so, the appropriate measures to take. The evaluation should include scenarios for simultaneous sudden power loss and pump station startup for high and low level wet well conditions under each pump station's design flow. The results would include recommended surge protection measures including, but not limited to, new or larger pressurized surge tanks or vacuum relief valves.

Table Ͱ.ͱ provides the evaluation cost estimate for this analysis. For planning purposes, the anticipated recommendations for pressure surge improvements are included with the CIP for BCPS and RPS.

Table Ͱ.ͱ Pressure Surge Analysis Cost Estimate
Item Cost Estimate
Pressure Surge Analysis ͈ͮͬ,ͬͬͬ
Total Estimated Project Cost ͈ͮͬ,ͬͬͬ

4.1.7 Recommended Study and Assessments Summary
Table Ͱ.Ͳ provides a summary of the Studies and Assessment project costs.

Table Ͱ.Ͳ Recommended Study and Assessments CIP Summary Item Cost Estimate
SCADA Study ͈ͳͱ,ͬͬͬ
Security Features Study and Improvements ͈ͯͱͬ,ͬͬͬ
BVPS and RPS Generator Testing Assessment ͈Ͳͬ,ͬͬͬ
Forcemain Assessment ͈ͱͬ,ͬͬͬ
Pressure Surge Analysis ͈ͮͬ,ͬͬͬ
Total Estimated Project Costs ͈ͱͱͱ,ͬͬͬ

4.2 Buena Vista Pump Station

4.2.1 Building Items and Site Work
Replacing the ʹ-foot tall chain-link fence and gates with an ʹ-foot tall candy cane-style security fence is recommended. The project would include demolishing and replacing approximately ͱͬͬ linear feet of perimeter fence with one traffic and one walk gate.

The steel rolling gate that secures the vehicle access platform is ͳ feet Ͱ inches tall. This gate abuts a parapet wall with an imbedded handrail only Ͱ feet tall, which allows for easy access to the site. Installing ʹ-feet tall candy cane style security fencing along the existing masonry wall that continues to Jefferson Street will make intruder access to the pump station more difficult and may reduce site breaches. Approximately ͭͬͬ linear feet of fencing will be required. 05/13/2025 C9 460 of 1078
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Approximately ͭʹ,ͬͬͬ square feet of asphalt in the pump station compound and along the access road requires resurfacing with a ͯ-inch asphalt layer and tack coat. The asphalt around the two existing manholes within the compound shall be applied to be at grade level of the manholes.

After the rehabilitation project, implementing a program to repair and reseal the asphalt every five years is recommended. This will improve the life and appearance of the compound and access road while reducing the need for larger capital projects for replacement.

Staff reported concerns about placing emergency equipment in the current site plan and asked that options for a staging area be explored. The berm located south of the pump station, which creates a containment barrier during a spill, was mentioned as a possible location.

Based on investigations of property boundaries, the southern boundary appears to follow the fence line from the west and then the outer edge of the asphalt driveway to the north. Because this path would lead the berm outside of the property line, the southern boundary is not a suitable location.

Instead, the most suitable location for staging is the pump station compound. At the compound, space along the access road can be used as long as using it does not impede EWA and emergency personnel and vehicles from accessing the site.

The roof must be rehabilitated to protect the building and equipment from corrosion and damage. The leaks have caused corrosion to wet and dry well fans and will cause more damage if not resolved.

The tile roof is approximately ͭ,Ͱͬͬ square feet and should be demolished and replaced. To prevent leaks into the building, the membrane roof that covers the concrete barrel roof should be installed. The barrel roof is approximately ͭ,Ͳͬͬ square feet. Installing a new membrane roof is required for the entire surface.

Installing a platform to enable easy access to the
surge tanks for maintenance is recommended to
promote operator safety, Figure Ͱ.ͭ. An H-shaped
aluminum platform will fit between the surge tanks
to facilitate staff access to the hatches on each end of the tanks and valves on top of the tank. Aluminum
stairs and an aluminum handrail will be built for
access and to protect the stairs and the elevated
perimeters of the platform.

To ensure that a spill in the motor room is contained,
the flood containment door should be replaced. Removing the seal water system is also recommended, since installing self-flushing mechanical seals renders it obsolete. Removal is recommended because spending resources on maintenance is unnecessary, and removing it frees up floor space.

The light fixtures in the wet well are severely corroded and will also need to be replaced to provide adequate lighting for operator safety. Replacement fixtures will be rated for Class I Division ͮ installation in the wet well.

Figure Ͱ.ͭ Existing Surge Tank Access
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To remediate groundwater infiltration in both meter vaults between the concrete joints and the aluminum cap, track injection is recommended. More than one application might be required.

The switchgear at the service entrance is severely corroded and is recommended for replacement.

Replacing the three exterior ͮͱͬ watt floodlights with ͭͬͬͬ watt floodlights, connected to the photoelectric sensor for automatic operation based on available daylight, is recommended for better lighting. Although interior lighting is sufficient, the Ͱ-foot bulbs in the middle fixture above the stairwell need to be replaced. The bulb also needs to be replaced in one of the fixtures along the south wall in the pump room. Including bulb replacement as part of normal site maintenance is recommended and is not thus included in the CIP cost estimate.

The metal equipment and piping at the pump station need to be painted and coated to prevent corrosion and deterioration of equipment surfaces and connections. An initial project to repair chips and recoat or repaint the metal equipment and piping is recommended. The surface should be prepared after this project but before installing an epoxy or polyurethane coating system. A program involving annual touch-up applications should also be implemented to keep all coatings and paint intact.

Table Ͱ.ͳ provides the project cost estimate.

Table Ͱ.ͳ Building Items and Site Work Cost Estimate
Item Cost Estimate
Flood Containment Door ͈ͭͬ,ͬͬͬ
Wet Well Lighting (Class I Div. ͮ) ͈͵,ͬͬͬ
Seal Water System Demolition ͈ͭ,ͬͬͬ
Tile Roof - Demolition and Replacement ͈ͭͬ,ͬͬͬ
Membrane Roof ͈ͭͮ,ͬͬͬ
Floodlights ͈ͯ,ͬͬͬ
Painting and Coating, Initial Repair and
Application ͈ͭͬ,ͬͬͬ
Service Entrance Switchgear ͈ͮͬͱ,ͬͬͬ
Fence ͈ͰͰ,ͬͬͬ
Meter Vault - Crack Injection ͈ͱ,ͬͬͬ
Asphalt ͈ͯͮ,ͬͬͬ
Surge Tank Access Platform ͈Ͳͯ,ͬͬͬ
Subtotal ͈ͰͬͰ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͮͯ,ͬͬͬ
Total Estimated Construction Costs ͈Ͳͮͳ,ͬͬͬ
Engineering and Administration Fees ͈ͭͮͲ,ͬͬͬ
Total Estimated Project Cost ͈ͳͱͯ,ͬͬͬ
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4.2.2 VFD and PLC Replacement
The VFDs and PLC are obsolete and are scheduled for replacement as part of the current project.

Construction is expected to be completed in ͮͬͭͲ.T a b l e Ͱ.ʹ provides the estimated construction costs for this replacement.

Table Ͱ.ʹ VFD and PLC Cost Estimate
Item Cost Estimate
General Conditions & Mob/De-mob (ͭͬ%) ͈ͭͭͮ,ͬͬͬ
Site Construction ͈ͰͰͬ,ͬͬͬ
Electrical ͈Ͱͳͮ,ͬͬͬ
Instrumentation and Control ͈͵ʹ,ͬͬͬ
Total Estimated Construction Costs 1 ͈ͭ,ͭͮͮ,ͬͬͬ

4.2.3 Pump Rehabilitation
Under normal operations, excessive noise was noted at both the impeller region of Pump No. ͱ and at the ͭͰ-inch check valve. Furthermore, the valve has corrosion, indicating a leak, and is recommended for replacement. V & A's vibration analysis performed in the condition assessment confirmed that the motor and pump exhibit vibration and noise outside of normal operational levels and thus require rehabilitation or replacement. V & A's vibration testing also recommended that Pump No. Ͱ be rehabilitated. Section Ͱ.ͮ.ͭͰ discusses the results of this testing.

Pump No. ͱ should be inspected to determine if a rebuild is appropriate. Rebuilding No. ͱ can extend its useful life by about ͭͬ years. However, since all pumps are recommended to be replaced within the next ͱ to ͭͬ years because of their age, rehabilitating Pump No. ͱ is recommended instead of replacing it. This will ensure that the pump operates efficiently until replacement. If issues are discovered during rehabilitation, and rehabilitation is deemed less cost-effective, the pump should be replaced instead.

Table Ͱ.͵ provides the project cost estimate.

Table Ͱ.͵ Pump Rehabilitation Cost Estimate
Item Cost Estimate
Rehabilitation of Pump Nos. Ͱ and ͱ ͈ͱͬ,ͬͬͬ
Total Estimated Project Cost ͈ͱͬ,ͬͬͬ

4.2.4 Forcemain Valve Replacement and Automation
All valves are recommended for replacement because of leakage and corrosion at the forcemain plug valves.

Accessing the ͮͰ-inch buried valves during replacement would require additional costs and asphalt repair. The ͮͬ-inch plug valve on Forcemain B inside the pump station building and three

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buried ͮͰ-inch plug valves on the forcemain exterior to the building are recommended to be automated for increased flexibility in isolating flow.

Pump station maintenance staff reported that the current vertical installation of some of the check valves make access difficult. Three of the four discharge check valves are vertically aligned, but further investigation into whether they can be installed in a horizontal position is required.

While some space is available to reposition pipes and valves, these changes' effects on resonance and on the positioning of the dampening arms must be considered. Further investigation is required to determine whether the check valves can be repositioned and would need to be included in pump replacement design.

Table Ͱ.ͭͬ provides the project cost estimate for the valve replacement.

Table Ͱ.ͭͬ Forcemain Plug Valve Replacement Cost Estimate Item Cost Estimate
Plug Valves ͈ʹͳ,ͬͬͬ
Valve Actuators for Automation ͈ͮʹ,ͬͬͬ
Additional Crew Labor ͈ͭͱ,ͬͬͬ
Subtotal ͈ͭͯͬ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͳͮ,ͬͬͬ
Total Estimated Construction Costs ͈ͮͬͮ,ͬͬͬ
Engineering and Administration Fees ͈Ͱͬ,ͬͬͬ
Total Estimated Project Cost ͈ͮͰͮ,ͬͬͬ

4.2.5 Grinder Improvements
Because pump failure is typically caused by ragging, improvements to maintain pump station operations are recommended. Investigations into replacing the current configuration will determine whether a single channel grinder will fit into the existing channel or whether a new channel is also required.

Several options for improving the sewage grinding configuration were explored. Three options of these options involve constructing a new concrete vault housing a single or double grinder channel between the existing manhole and influent entrance to the wet well. These options are as follows:
x Option 1: construct a channel that houses dual channel grinders with overflow racks, each able to handle the design flow of ͮͯ.ͭ mgd. Each channel could be isolated with slide gates for maintenance. This option provides needed redundancy and overflow protection.
x Option 2: use two channel grinders, each able to handle half the design flow (ͭͯ.ʹ mgd each), with a third unit on the shelf.
x Option 3: Install a new grinder where the existing barscreen and grinder are. The grinder channel would be approximately Ͱͬ inches wide and would have to accommodate one 05/13/2025 C9 464 of 1078
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grinder that can handle the design flow. One spare grinder would be on the shelf for redundancy.

The DMͯͲ can handle a maximum flow of ͮͰ.ͯ mgd and a minimum average flow of ͮ.ʹ mgd.

Although it is suited for the pump station's conditions, it is Ͱͳ inches wide. Because of this width, installation would require removing or replacing large portions of the wet well, making it a less desirable alternative. The largest available unit that will fit in the existing space has a capacity of ͭͲ.Ͳ mgd. While this capacity is above peak flows, it does not meet the design flow.

In addition to the three options described above, Option Ͱ investigated whether one or two inline grinders might fit the application. The highest capacity inline unit Franklin Miller manufactures handles a maximum flow of ͭͯ.ͮ mgd. Because of this capacity, two grinders would be required to meet design flow criteria.

The shredders require Ͳ FPS for the solids to push through the screen. Because the installation is for a gravity-fed influent line, this condition is not satisfied. As a result, the inline grinders would have to be installed vertically, making this option impractical.

Option ͱ investigated the potential of chopper pumps to provide redundancy to the system.

Chopper pumps are not intended for large debris that sometimes enters the wet well so their installation would not allow the elimination of the existing barscreen and grinder. The largest chopper pumps are able to meet the design criteria of the pump station while operating near the end of the pump curve. Chopper pumps are not recommended as they would not be able to turn down enough to meet the average flow conditions of the pump station.

Option Ͳ looked at obtaining a second communitor to serve as a shelf-spare as backup to the existing communitor at the BVPS, which would provide redundancy that is currently lacking.

Procuring a duplicate JWC Macho Monster would allow maintenance staff to have a grinder ready to replace one that is removed for service or maintenance, rather than resorting to manual rag removal during this time. The grinder has a capacity of ͮ.ͭ mgd which is adequate to grind the debris removed from the influent by the bar screen. Because the same model communitor is available, no modifications would be required to the existing configuration. The JWC Macho Monster is still being manufactured and could be purchased as part of a potential future project or addressed as an operations and maintenance issue.

Of these options, Option ͭ is recommended as the most efficient way to provide redundancy for the pump station's sewage grinding. A new concrete vault will be constructed between the influent manhole to the east of the pump station and the wet well. Figure Ͱ.ͮ shows this configuration.
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Figure Ͱ.ͮ Grinder Vault, Aerial View

4.2.5.1 Option 1 - Grinder Vault
For this option, influent would enter the vault, and a bulkhead wall would separate flow into two channels, each housing a channel grinder with a capacity of ͮͰ.ͯ mgd. This configuration would provide full redundancy.

For maintenance, stainless-steel slide gates with handwheel operators upstream and downstream of the grinders allow for flow isolation. The open channels are covered by fiber- reinforced plastic (FRP) grating, level with the top of the channels and bulkhead wall, to provide a safe surface for staff. The vault can be accessed through an aluminum hatch that opens to an aluminum landing and flight of stairs with a handrail. Additional hatches will be located in the asphalt to access the grinders for removal.

Installing the concrete vault and grinders requires complete bypass of the pump station for approximately two months. However, this project will also reduce maintenance needs and staff exposure to hazards from screenings removal, wet well entry, and lifting from cleaning the bar screen.

Figure Ͱ.ͯ shows the grinder vault plan view. Figure Ͱ.Ͱ shows the section view. 05/13/2025 C9 466 of 1078
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Figure Ͱ.ͯ BVPS Grinder Vault Plan View
Figure Ͱ.Ͱ Grinder Vault, Section View
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Table Ͱ.ͭͭ provides the project cost estimate for Option ͭ.

Table Ͱ.ͭͭ Option ͭ - Grinder Improvements Cost Estimate Item Cost Estimate
Demolition ͈ͭͬ,ͬͬͬ
Channel Grinders ͈ͮͬͬ,ͬͬͬ
Excavation and Site Work ͈Ͳͬ,ͬͬͬ
Bypass Pumping ͈ʹͮͯ,ͬͬͬ
Aluminum Stairs, with Railing and Supports ͈ʹ,ͬͬͬ
Aluminum Hatches ͈ͮͱ,ͬͬͬ
Concrete, FRP Grating, Slide Gates ͈ͭͭͯ,ͬͬͬ
Subtotal ͈ͭ,ͮͯ͵,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈Ͳʹʹ,ͬͬͬ
Total Estimated Construction Costs ͈ͭ,͵ͮͳ,ͬͬͬ
Engineering and Administration Fees ͈ͯʹͱ,ͬͬͬ
Total Estimated Project Cost ͈ͮ,ͯͭͮ,ͬͬͬ
If the implementation of this project is not expected to occur for several years, it is recommended to proceed with Option Ͳ in the interim to ensure continued performance of the pump station.

Table Ͱ.ͭͮ provides the project cost estimate for Option Ͳ.

Table Ͱ.ͭͮ Option Ͳ - Shelf-spare Communitor Cost Estimate Item Cost Estimate
JWC Macho Monster ͈Ͱͯ,ͬͬͬ
Subtotal ͈Ͱͯ,ͬͬͬ
Sales Tax (ʹ%) ͈ͯ,ͬͬͬ
Administration Fees ͈ͱ,ͬͬͬ
Total Estimated Project Cost ͈ͱͭ,ͬͬͬ

4.2.6 Backflow Preventer
The hydropneumatic tank and the air gap tank are nearing the ends of their useful lives and are recommended to be replaced with a backflow preventer. A double check valve configuration will provide appropriate protection, use space more efficiently, and decrease maintenance requirements.
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Table Ͱ.ͭͯ provides the project cost estimate on the backflow preventer.

Table Ͱ.ͭͯ Backflow Preventer Cost Estimate
Item Cost Estimate
Demolition ͈ͭͱ,ͬͬͬ
Backflow Preventer ͈ͭͬ,ͬͬͬ
Yard Work ͈ͭͬ,ͬͬͬ
Pipe Modifications ͈ͯ,ͬͬͬ
Subtotal ͈ͯʹ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͬ,ͬͬͬ
Total Estimated Construction Costs ͈ͱʹ,ͬͬͬ
Engineering and Administration Fees ͈ͭͮ,ͬͬͬ
Total Estimated Project Cost ͈ͳͬ,ͬͬͬ

4.2.7 Vapor Phase Odor Control
At this time, neither vapor nor liquid phase odor control is recommended. Figure Ͱ.ͱ shows the Odalog sensor results from December ͮͬͭͱ. The hydrogen sulfide levels are near zero or below detection levels. If the need for odor control arises from encroaching construction, a vapor phase odor control system would be sufficient. Scrubbing the entire station is not necessary because the wet well is physically separated from the other rooms in the pump station.

Figure Ͱ.ͱ Odalog Sensor Data
52 54
56 58
60 62
64 66
68 70
72 0

0.1 0.2

0.3 0.4

0.5 0.6

0.7 0.8

0.9 1
12/11/15 12/12/15 12/13/15 12/14/15 12/15/15 12/15/15 12/16/15 Temperature,°F
H2S Concentration, ppm
H2S Concentration Temperature
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If odor control is required, two alternatives can be considered to meet pump station conditions based on the wet well volume of ͭͭͬͬ CFM and twelve ACH, as specified for the minimum ventilation rate for a Class I Division ͭ locations in NFPA ʹͮͬ. These alternatives are described below.

4.2.7.1 Alternative 1 - Two-stage Biological and Carbon Scrubber This alternative is a two-stage process. The first stage is a biological scrubber, and the second stage is a carbon scrubber.

The system includes two vessels with a footprint of about ͭͲ by ͮͳ feet and an overall height of ͭͲ feet. The first vessel uses a nutrient feed to maintain a bacteria population that forms on an appropriate media. The second vessel contains carbon, which will need to be periodically replaced. Error! Reference source not found. depicts the two-stage biological and carbon scrubber. Table Ͱ.ͭͰ presents the design criteria and removal efficiency of this alternative.

Table Ͱ.ͭͰ Design Criteria for Biological + Carbon Two-Stage Scrubber Scrubber
Stage/Type
# of
Vessels
Vessel
Diameter
Vessel
Height,
ft
Media
Depth,
ft
Flow
Rate,
CFM
EBRT,
sec
DP,
in.
w.c.

Average
HͮS
Removal
Efficiency
Average
Odor
Removal
ͭ - Biological ͭ ʹ ͭͱ Ͳ ͭ,ͭͬͬ ͭͲ.Ͱ ͯ-ͱ >͵ʹ% >͵ͬ%
ͮ - Carbon ͭͲ ͳ .ͱͯ ͭ ,ͭͬͬ Ͱ .ͲͰ -ͳ > ͵͵.ͱ% > ͵ͬ%
Figure Ͱ.Ͳ Alternative ͭ: Bio+Carbon Scrubber
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4.2.7.2 Alternative 2 - Two-stage Biological Scrubber This alternative is also a two-stage process as well, but both stages are biological and occur in the same vessel. The system has a footprint of ͮͬ by ͭʹ.ͱ feet but is taller, with a height of ͮʹ feet.

Figure Ͱ.ͳ illustrates the two-stage biological scrubber. Table Ͱ.ͭͱ presents the design criteria and removal efficiency of this alternative.

Table Ͱ.ͭͱ Design Criteria for Biological Two-Stage Scrubber Scrubber
Stage/Type
# of
Vessels
Vessel
Diameter
Vessel
Height,
ft
Media
Depth,
ft
Flow
Rate,
CFM
EBRT,
sec
DP,
in.
w.c.

Average
HͮS
Removal
Efficiency
Average
Odor
Removal
ͭ - Biological
ͭ ͭͬ ͮͱ
ͯ.ͱ
ͭ,ͭͬͬ
ͭͱ
Ͱ-ͳ >͵͵% >͵ͬ%
ͮ - Biological ͵ͯ ͵
Figure Ͱ.ͳ Alternative ͮ: Two-stage (both Biological) Scrubber 05/13/2025 C9 471 of 1078
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4.2.7.3 Alternative Analysis
Table Ͱ.ͭͲ summarizes the estimated installation cost for each alternative.

Table Ͱ.ͭͲ Installation Cost Comparison
Item Description Alternative ͭ: Bio +
Carbon
Alternative ͮ:

Bio Only
Two-Stage Scrubber ͈ͯͭͬ,ͬͬͬ ͈ͮ͵ͮ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͭͳͮ,ͬͬͬ ͈ͭͲͮ ,ͬͬͬ Engineering and Administration Fees ͈͵Ͳ,ͬͬͬ ͈͵ͭ,ͬͬͬ
Total Estimated Project Cost ͈ͱͳʹ,ͬͬͬ ͈ͱͰͱ ,ͬͬͬ
Installation cost is similar in both alternatives. The higher cost of Alternative ͭ is offset by the increased cost of media for Alternative ͮ. This increased cost is because biological scrubber media costs approximately ten times as much as carbon scrubber media.

Costs aside, both alternatives effectively remove͵͵ percent of HͮS present and approximately ͵ͬ percent of odors. Both would meet the needs of the pump station.

To further analyze each alternative, operations and maintenance requirements were investigated. According to the analysis, both systems require makeup water, nutrient addition, electricity, media, and labor. These requirements are explained below. x The makeup water must be non-chlorinated to be compatible with biological processes. x Electrical costs are based on a supply of Ͱʹͬ V ͯ-phase electricity to power the fans and pumps.
x Chemicals are fed continuously into the system to provide necessary nutrients for biological growth.
x Labor costs are based on one operator spending one hour maintaining the system twice weekly. Typical maintenance involves ensuring that all components function properly and replenish nutrients.
x Media for the biological scrubbers does not require regular replacement and is expected to provide a substrate for biological growth throughout the system's lifetime.

Alternative ͭ would need the carbon media changed out about every two years, which poses an additional cost for the media and the labor required for installation. Because media are replaced every two years, the estimated annual cost for carbon replacement is based on half the total cost of replacing the entire ͮ,ͮͬͬ pounds of carbon media. This cost includes labor.

Table Ͱ.ͭͳ provides the estimated annual operating and maintenance expenses for each alternative.
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Table Ͱ.ͭͳ Estimated Annual Operations & Maintenance Costs O&M Item Unit Cost
Alternative ͭ Alternative ͮ
Basis
Cost per
year Basis
Cost per
year
Makeup
Water ͈ͮ.ͯͬ/ͳͰʹ gal ͬ.ͳͱ gpm ͈ͭ,Ͳͬͬ ͭ.ͮ gpm ͈ͮ,ͬͬͬ
Electricity ͈ͬ.ͭͱ/Kwh
Fan: ͭͭͬͬ CFM @
ͭͮ" wc; BHP ͱ.ͱ
Pump: ͮͱ gpm @
ʹͬ ft head; BHP
ͮ.ͱ
͈ͳ,ʹͬͬ
Fan: ͭͭͬͬ CFM
@Ͳ" wc; BHP ͮ.ͳ
Pump: Ͱͬ gpm @
ʹͬ ft head; BHP
ͮ.͵
͈ͱ,Ͱͬͬ
Nutrients ͈ͮͰ/gal <ͬ.ͬͭͱ gal/hr ͈ͯ,ͭͱͬ <ͬ.ͬͰ gal/hr ͈ͯ,ʹͱͬ Labor ͈ͱͬ/hr/operator ͮ hr/wk ͈ͱ,ͮͬͬ ͮ hr/wk ͈ͱ,ͮͬͬ
Carbon
Replacement
Carbon:
͈ͮ.ͱͬ/lb
Labor: ͈ͬ.ͳͬ/lb
ͮ,ͮͬͬ lbs every
ͮ years ͈ͯ,ͱͮͬ --- ---
Total Estimated Annual
O&M Costs ͈ͮͭ,ͮͳͬ ͈ͭͲ ,Ͱͱͬ
Two locations were proposed for the system: the southeast corner of the yard and the northeast corner. The southeast corner is the most likely location for equipment staging and is also near the underground influent pipeline, making it a less suitable location for the odor control equipment. The northeast corner is sheltered by trees, which would help reduce the visibility of the vessels.

4.2.7.4 Recommendation
If the proposed resort is constructed adjacent to the pump station, the recommendation is to provide odor control by installing the two-stage biological scrubber described for Alternativeͮ.

The best location for the unit would be in the compound's northeast corner where trees help obscure the tower.

Table Ͱ.ͭʹ provides the cost estimate for this project.

Table Ͱ.ͭʹ Odor Control Unit Cost Estimate
Item Cost Estimate
Two-stage Biological Scrubber ͈ͮ͵ͮ,ͬͬͬ
Subtotal ͈ͮ͵ͮ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͭͲͮ,ͬͬͬ
Total Estimated Construction Costs ͈ͰͱͰ,ͬͬͬ
Engineering and Administration Fees ͈͵ͭ,ͬͬͬ
Total Estimated Project Cost ͈ͱͰͱ,ͬͬͬ
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4.2.8 Wet Well Rehabilitation
If the wet well cannot be accessed for a thorough inspection, rehabilitation is recommended in five to ten years. This recommendation is due to the age and condition of the wet well's visible portions of the wet well. The assessment team noted that the roof has multiple cracks which may be responsible for leaks in the room and should be fixed to prevent rebar corrosion.

The entire surface area of approximately ͯ,ͬͬͬ square feet must be prepared for concrete repair and coating by sandblasting to remove the existing coating and any dirt or debris. An assumption was made that half of the total surface area will require concrete repair before the new coating can be installed. The process is estimated to take three weeks, during which bypass pumping must be utilized to enable access to the wet well while maintaining operations.

The project cost estimate is provided in Table Ͱ.ͭ͵.

Table Ͱ.ͭ͵ Wet Well Rehabilitation Cost Estimate
Item Cost Estimate
Surface Preparation ͈ͱͰ,ͬͬͬ
Concrete Repair ͈ͯͬ,ͬͬͬ
Wet Well Coating ͈ͳͱ,ͬͬͬ
Bypass Pumping Mobilization/Demobilization ͈ͱͱ,ͬͬͬ
Bypass Pumping Operations ͈ͮͲʹ,ͬͬͬ
Subtotal ͈Ͱʹͯ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͲʹ,ͬͬͬ
Total Estimated Construction Costs ͈ͳͱͭ,ͬͬͬ
Engineering and Administration Fees ͈ͭͱͬ,ͬͬͬ
Total Estimated Project Cost ͈͵ͬͭ,ͬͬͬ

4.2.9 Level Monitoring System Upgrade
Either the existing ultrasonic control system or pneumatic bubbler system can provide a pressure signal to the PLC, which sends an output for pump speed control to the VFD's. The bubbler system technology is outdated, requires more maintenance, and is more complicated than the newer pressure transducer level monitoring technology. The bubbler control system is recommended for replacement with a pressure transducer level monitoring system.

Installing a pressure transducer level monitoring system will reduce maintenance requirements and transition the monitoring method to a more modern technology. Two compressors (one duty and one backup), a backup compressed air system, and additional monitoring and controls are required as accessory equipment to the bubbler.
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Table Ͱ.ͮͬ provides the project cost estimate for the replacement.

Table Ͱ.ͮͬ Level Monitoring System Cost Estimate
Item Cost Estimate
Demolition ͈ͱ,ͬͬͬ
Pressure Transducer Level Monitor System ͈ͭͬ,ͬͬͬ
Subtotal ͈ͭͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈͵,ͬͬͬ
Total Estimated Construction Costs ͈ͮͰ,ͬͬͬ
Engineering and Administration Fees ͈ͱ,ͬͬͬ
Total Estimated Project Cost ͈ͮ͵,ͬͬͬ

4.2.10 Exhaust Fan Replacement
Chapter ͵ of NFPA ʹͮͬ deals specifically with the ventilation of enclosed wastewater pumping and process-related areas, not including space used for administrative or other purposes. NFPA ʹͮͬ designates ͭͮ ACH in Class I Division ͮ locations and less than ͭͮ ACH for Class I Division ͭ locations. The standard also requires that mechanically ventilated spaces are equipped with both supply and exhaust fans.

The exhaust fan that ventilates the electrical room is recommended for replacement. Assuming the supply fan assuming is rated similarly to the exhaust fan, it is also recommended for replacement. The replacement fan should be rated for approximately ͯ,Ͳͬͬ CFM under normal operations, with a ͭ-hp motor. A thermostat is also recommended to decrease ventilation in wet weather if needed.

Table Ͱ.ͮͭ provides the project cost estimate for the exhaust fan replacement.

Table Ͱ.ͮͭ Exhaust Fan Replacement Cost Estimate
Item Cost Estimate
Exhaust and Supply Fans, ͯͲͬͬ CFM (ͮ) ͈ͭͮ,ͬͬͬ
Fan Motors, ͭ hp (ͮ) ͈ͮ,ͬͬͬ
Thermostat ͈ͭ,ͬͬͬ
Subtotal ͈ͭͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈͵,ͬͬͬ
Total Estimated Construction Costs ͈ͮͰ,ͬͬͬ
Engineering and Administration Fees ͈ͱ,ͬͬͬ
Total Estimated Project Cost ͈ͮ͵,ͬͬͬ

4.2.11 Assets Nearing End of Useful Life
The R-CAMP® methodology and report recommended a condition assessment on critical assets based only on installation date and equipment age. Instead of focusing only on equipment nearing the end of its useful life, Carollo performed a thorough condition assessment of all major assets at each pump station.

Although both methods have merit, Carollo's approach increases the likelihood of identifying areas needing improvement and of discovering potential issues before operations are impaired. 05/13/2025 C9 475 of 1078
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Furthermore, instead of assessing only an asset's age, Carollo's method considers an asset's current condition and whether the asset has been rehabilitated to extend its useful life.

Based on Carollo's evaluation, assets expected to need replacement within the next five to ten years, based on age and original useful life, were identified. The assets are described below. x The ͮͰ-inch magnetic flow meters on Forcemains A and B were installed in ͮͬͭͯ and have an OUL of ten years. These flow meters measure the flow directed to EWPCF for treatment. The flow transmitters were installed with the flow meters and are expected to reach the ends of their useful lives at the same time as the flow meters. Both the meters and the transmitters for each forcemain should be scheduled for replacement in ͮͬͮͯ to ensure that discharge flows are properly monitored. x The gas analyzer that monitors the wet and dry wells was installed in ͭ͵͵Ͳ. Although it was refurbished in ͮͬͬʹ, it should be considered for replacement. The analyzer has exceeded its OUL of ten years by double, even though the assessment team rated its condition as very good, and staff safety depends on accurate gas and oxygen readings from the analyzer.

Although the pumps four ͯͬͬ-hp dry-pit centrifugal pumps were properly maintained to provide for ͮͬ years of operation, their OUL of ͭͱ years has been exceeded. Based solely on the pumps' installation date, they would have been listed for replacement five years ago.

Based on the condition assessment, the evRULis ͵ years for Pump No. ͱ and ͭͮ years for the other three pumps. If replacement is based on the evRUL, the pumps would be around ͯͬ years old at the time of decommission. At that age, continued performance at the current level cannot be expected. Over the next ten years, their performance will decrease while maintenance issues increase.

Given this information, the recommended approach is to replace the pumps within the next five to ten years before performance is adversely affected. The cost estimate for replacement includes an adder for electrical to account for costs associated with installation and integration with existing instrumentation.

Table Ͱ.ͮͮ provides the project cost estimate for these assets.

Table Ͱ.ͮͮ Assets Nearing End of Useful Life Cost Estimate Item Cost Estimate
Flow Meters, A and B ͈Ͱͬ,ͬͬͬ
Flow Transmitters, A and B ͈ͭͬ,ͬͬͬ
Gas Analyzer ͈ͱ,ͬͬͬ
Pumps (Ͱ) ͈ͯͬͬ,ͬͬͬ
Adder for Electrical (ͭͬ%) ͈ͯͬ,ͬͬͬ
Subtotal ͈ͯʹͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͭͰ,ͬͬͬ
Total Estimated Construction Costs ͈ͱ͵͵,ͬͬͬ
Engineering and Administration Fees ͈ͭͮͬ,ͬͬͬ
Total Estimated Project Cost ͈ͳͭ͵,ͬͬͬ
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4.2.12 V & A Recommendations
The condition assessment performed by V & A Consulting Engineers, Inc. identified additional projects.

While the interior concrete surfaces of the dry well are in good condition (VANDA Level ͭ), continued monitoring for signs of increasing infiltration and corrosion staining is recommended.

Further evaluation of the concrete and steel at locations of staining should also be considered to determine corrosion stimulants and corrosion potential, concrete characteristics, reinforcing steel placement and condition, and the extent of any damage.

In addition, repairing the grout pads under the pump bases is recommended to prevent further deterioration along the edges. To prevent more corrosion, the coating on metal equipment and piping should also be repaired. This project, which would include an initial plan to repair and recoat all metal equipment and piping, followed by an annual maintenance program, is recommended previously in this chapter. Before applying a ͭͬͬ percent solids epoxy or polyurethane coating system, surfaces need to be prepared appropriately.

The meter vaults show moderate to extensive groundwater infiltration and are recommended for further testing similar to the dry well. This testing will gather more information about the condition of the concrete and steel components.

Replacing the corroded electrical components within the vaults with corrosion-resistant materials is recommended. These components include the meter ground cables, connectors, and cam-lock fittings for the sump pump.

In addition, because the water infiltrating the vaults is assumed to be brackish, all materials and coatings used in the vaults should be suitable for a marine environment to prevent damage.

Because groundwater infiltration might also be damaging buried ductile iron piping, construction details should be reviewed to determine whether the buried pipe has appropriate corrosion protection. Further evaluations should be considered to determine the condition of the buried pipe and the soil corrosivity of the area.

Replacing the corroded drain piping and the band clamps for the coupling is recommended. The ventilation ducting connectors and any missing hardware in the bathroom are recommended for repair, and the flange alignment should be corrected.

A complete structural analysis is recommended to identify mitigation steps for vibration issues.

The analysis would begin with setting up a model in the analysis program that identifies major components and test points, with detailed dimensional and structural information.

Instrumentation would be set up similar to the initial vibration testing but with more data channels and a more controlled test sequence for data collection. The data would then be merged into the model, and the areas of structural concern would be defined. 05/13/2025 C9 477 of 1078
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This analysis would provide recommendations for structural support and stiffening modifications, as well as addressing any seismic issues noted. These modifications can be temporarily installed (often using saddle supports or hydraulic jacks) before additional vibration data is collected to ensure that vibration is reduced before implementing permanent modifications.

Vibration testing identified minor- to moderate-severity issues that are recommended for addressing in the next planned station outage or when operations can be modified to isolate areas requiring work. Recommendations for addressing these issues are as follows:
x Frequent monitoring of the dampening arms on dampeners on the motors and pumps is recommended to ensure that the arms' stiffness doesn't change significantly. x The dampening arm and pipe supports at Pump No. ͮ should be inspected to ensure that the high peaks seen during analysis are not from rigidity loss. x Disassembling and inspecting the upper bearings on Motor No. Ͱ is recommended. As warranted, these bearings are recommended for rehabilitation and replacement. x Rehabilitating Motor and Pump Nos. Ͱ and ͱ was recommended in a previously described CIP, Section Ͱ.ͮ.ͯ. This rehabilitation will resolve the vibrational issues likely caused by loose bearings and cavitation in the upper bearing. Pump replacement is recommended if rehabilitation is less cost-effective than replacement.

All four of the pumps are recommended for replacement within five to ten years. However, replacement could be moved up to remediate the vibration problems. To prevent resonance issues from the current configuration, the structural analysis should be performed while installing new pumps. The structural analysis should ensure that the pump replacement complies with the current code.

In the next three to five years, an evaluation is recommended for the pump station to calculate the minimum required pipe thickness based on pressure, loading, and other criteria. These results should be compared to the measured thicknesses in the V & A report to determine how much additional wall loss can be tolerated before the pipe's integrity is impaired.

Addressing piping issues is recommended to decrease corrosion and maintain pipe integrity in the dry well. Because of significant wall loss and corrosion around the threaded tap, the ͮͬ-inch header pipe spool on the discharge header from Pump Nos. ͭ and ͮ is recommended for replacement. When the station is shut down for the spool replacement or other work, further evaluation of the forcemain header should be considered.

A method such as closed-circuit television (CCTV) would provide additional information on the lining condition and corrosion issues inside the pipe. Since the data indicated that isolating areas of corrosion is possible, a contingency plan for a pipe leak or failure should be in place to limit the impact of such an event.
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Table Ͱ.ͮͯ provides the project cost estimate for V & A's recommendations.

Table Ͱ.ͮͯ V & A Buena Vista Project Cost Estimate
Item Cost Estimate
Header Spool Replacement ͈ͮ,ͬͬͬ
Repair Grout Pads ͈ͮ,ͬͬͬ
Replace Corroded Components Meter Vault ͈ͭͬ,ͬͬͬ
Coating - Marine Environment ͈ͭͬ,ͬͬͬ
Bathroom Repairs ͈ͭ,ͬͬͬ
Subtotal ͈ͮͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͭͱ,ͬͬͬ
Total Estimated Construction Costs ͈Ͱͬ,ͬͬͬ
Engineering and Administration Fees ͈ʹ,ͬͬͬ
Total Estimated Project Cost ͈Ͱʹ,ͬͬͬ

4.2.13 Buena Vista Pump Station CIP Summary
Table Ͱ.ͮͰ provides a summary of projects underway and CIP projects recommended for BVPS.

Table Ͱ.ͮͰ Buena Vista Pump Station CIP Summary
CIP Recommendations
Item Cost Estimate
Building Items and Site Work ͈ͳͱͯ,ͬͬͬ
Rehabilitation of Pump Nos. Ͱ and ͱ ͈ͱͬ,ͬͬͬ
Forcemain Plug Valve Replacement ͈ͮͰͮ,ͬͬͬ
Grinder Improvements - Option ͭ ͈ͮ,ͯͭͮ,ͬͬͬ
Shelf-spare communitor - Option Ͳ ͈ͱͭ,ͬͬͬ
Backflow Preventer ͈ͳͬ,ͬͬͬ
Vapor Phase Odor Control ͈ͱͰͱ,ͬͬͬ
Wet Well Rehabilitation ͈͵ͬͭ,ͬͬͬ
Level Monitoring System ͈ͮ͵,ͬͬͬ
Exhaust Fan Replacement ͈ͮ͵,ͬͬͬ
Assets Nearing End of Useful Life ͈ͳͭ͵,ͬͬͬ
V & A Buena Vista Project ͈Ͱʹ,ͬͬͬ
Total for CIP Recommendations ͈ͱ,ͳͰ͵,ͬͬͬ
Projects Underway
Item Cost Estimate
VFD/PLC Replacement ͈ͭ,ͭͮͮ,ͬͬͬ
Total for Projects Underway ͈ͭ,ͭͮͮ,ͬͬͬ
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4.3 Raceway Pump Station

4.3.1 Building and Site Items
For increased security, replacing the existing fence and gates with candy-cane style security fencing is recommended. The back gate is currently secured only with a padlock, and the new gate should have a chain with a lock.

The existing louvered doors allow plant material and dirt to infiltrate, which damages equipment. To prevent additional damage, replacing the louvered doors with hollow metal doors is recommended.

To prevent groundwater infiltration, installing a concrete berm over the creek is recommended to protect the creek during overflows. The berm would be triangular in shape, with a ͯ foot base, and would be ͭ foot tall. The additional height will direct flow away from the creek and toward the natural depression to the west side of the property for temporary storage.

Connecting the two exterior pole fixtures not on the photoelectric sensor to the sensor is recommended for automatic operation based on daylight. Because the light fixture on top of the building is corroded, Figure Ͱ.ʹ, it is also recommended for replacement.

The MCC does not have a surge
protection device installed. Installing
a protective device is recommended.

To prevent corrosion and
deterioration of equipment surfaces
and connections, an initial project to
repair chips and recoat or repaint the
metal equipment and piping is
recommended. The surfaces should
be prepared before installing a
ͭͬͬ percent solids epoxy or
polyurethane coating system.

In addition to these repairs,
implementing a program of annual touch-up applications is recommended to keep all coatings and paint intact. The cost for annual touch-up and maintenance is estimated to be approximately ͈ͯ,ͬͬͬ per pump station.

Figure Ͱ.ʹ Corroded Light Fixture
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Table Ͱ.ͮͱ provides the project cost estimate for the building and site items.

Table Ͱ.ͮͱ Building and Site Item Cost Estimate
Item Cost Estimate
Double Hollow Metal Doors ͈Ͱ,ͬͬͬ
Concrete Berm ͈ͮ,ͬͬͬ
Painting and Coating, Initial Repair and Application ͈ͭͬ,ͬͬͬ Roof Floodlight ͈ͭ,ͬͬͬ
MCC Surge Protection ͈ͭ,ͬͬͬ
Photoelectric Sensor Connections ͈ͭ,ͬͬͬ
Fence ͈ͯͯ,ͬͬͬ
Subtotal ͈ͱͮ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮ͵,ͬͬͬ
Total Estimated Construction Costs ͈ʹͭ,ͬͬͬ
Engineering and Administration Fees ͈ͭͲ,ͬͬͬ
Total Estimated Project Cost ͈͵ͳ,ͬͬͬ

4.3.2 Sewage Grinder Improvements
Installing dual Franklin Miller TaskMaster channel grinders, with overflow bar racks, is recommended to prevent damage on downstream equipment due to excess debris. EWA personnel request the new design allows for a barscreen to be dropped into place if one grinder needs to be pulled for service. Installation is scheduled as part of the current project and is expected to be completed in ͮͬͭͲ. The letter report highlighting Carollo's investigation into installation of new grinders at the RWPS is presented in Appendix J.

The installation of deragging equipment was investigated and information collected on Clearwater Controls Deragger II. The technical memo regarding the Deragger II is located in Appendix K. Given the lack of long-term evaluation of this product, the issues regarding integration into the VFD's, and that ragging at RWPS is primarily resolved with the use of grinders, it is not recommended to install the device at the RPS.

Table Ͱ.ͮͲ provides the estimated construction cost estimate for the dual redundant channel grinders. Total Estimated Construction Costs do not include engineering design costs. Design cost estimates have been provided to the City separately since the design work is being completed concurrently with this report.

Table Ͱ.ͮͲ Sewage Grinder Improvement
Item Cost Estimate
General Conditions & Mob/De-mob (ͭͬ%) ͈ͭͲ,ͬͬͬ
Equipment ͈ͭͯͱ,ͬͬͬ
Electrical ͈ͭͬ,ͬͬͬ
Total Estimated Construction Cost 2 ͈ͭͲͭ,ͬͬͬ
2 The Total Estimated Construction Costs do not include engineering design costs. Design cost estimates are provided separately as the design work is being completed concurrently with this report. 05/13/2025 C9 481 of 1078
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4.3.3 PLC Replacement
PLC replacement has been added to the scope of the current project and is expected to be completed in ͮͬͭͲ. Replacing the PLC will add redundancy, ensure accurate measurement, and ensure that data is not lost.

Table Ͱ.ͮͳ provides the estimated construction cost for PLC replacement. Total Estimated Construction Costs do not include engineering design costs. Design cost estimates have been provided to the City separately since the design work is being completed concurrently with this report.

Table Ͱ.ͮͳ PLC Replacement Cost Estimate
Item Cost Estimate
General Conditions & Mob/De-mob (ͭͬ%) ͈ʹ,ͬͬͬ
Instrumentation and Control ͈ʹͬ,ͬͬͬ
Total Estimated Construction Costs 3 ͈ʹʹ,ͬͬͬ

4.3.4 Emergency Overflow Storage Pond
The emergency overflow storage pond requires significant rehabilitation to resolve groundwater infiltration issues. Groundwater infiltration must be remediated by crack injection or by applying shotcrete or an epoxy/polyurethane coating to the pond's interior surface, which is approximately ͮ,ͮͬͬ square feet.

At first, crack injection costs less at about ͈ͭͬ,ͬͬͬ. However, while crack injection preserves the basin's storage capacity, it could take months and multiple applications to confirm that all routes of infiltration have been effectively blocked. Because this process will take longer to finish, it is not desirable.

Coating the entire surface of the overflow storage pond would be a conservative approach to dealing with groundwater infiltration. Although this method costs more, it is usually a one-time expense and a single application, which addresses the issue quickly.

Applying an epoxy/polyurethane coating is recommended to preserve the basin's volume. The reduction in capacity is negligible, and the coating costs are similar to shotcrete's. Shotcrete should not be considered, since applying shotcrete to a thickness of Ͱ inches reduces the storage volume of the overflow pond by about ͱ,ͱͬͬ gallons.

Additional recommendations are to demolish the curb around the perimeter of the overflow storage pond and build a new one and to recast the handrail using an appropriate insertion material to prevent cracking. Approximately ͮͰͱ linear feet of concrete curb and handrail is to be replaced.

Closer inspection of the ͭʹ-inch overflow flap gate is needed to determine if the gasket is missing or is damaged, and if rehabilitation or replacement is needed to ensure a proper seal if

3 The Total Estimated Construction Costs do not include engineering design costs. Design cost estimates are provided separately as the design work is being completed concurrently with this report. 05/13/2025 C9 482 of 1078
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the basin is full. However, this inspection is difficult. As a conservative recommendation, replacing the flap gate is recommended over rehabilitation.

Replacing the ͭͮ-inch buried plug valve is recommended. The City and Encina have decided to address this a maintenance issue and not part of a potential future project.

Table Ͱ.ͮʹ provides the project cost estimate to rehabilitate the overflow storage pond.

Table Ͱ.ͮʹ Overflow Storage Pond Rehabilitation Cost Estimate Item Cost Estimate
Curb Demolition ͈ͮ,ͬͬͬ
Concrete Curb ͈ͮ,ͬͬͬ
Aluminum Handrail ͈ͭͭ,ͬͬͬ
ͭʹ" Emergency Overflow Flap Gate ͈ʹ,ͬͬͬ
Epoxy/Polyurethane Coating ͈ͳͳ,ͬͬͬ
Subtotal ͈ͭͬͬ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͱͲ,ͬͬͬ
Total Estimated Construction Costs ͈ͭͱͲ,ͬͬͬ
Engineering and Administration Fees ͈ͯͭ,ͬͬͬ
Total Estimated Project Cost ͈ͭʹͳ,ͬͬͬ

4.3.5 Odor Control Unit
The odor control unit requires significant maintenance/rehabilitation. Due to age and condition, replacing the entire unit with a similar unit is recommended. A properly working odor control system will reduce odors at the plant and the surrounding areas and promote worker safety and comfort.

Table Ͱ.ͮ͵ provides the project cost estimate to replace the odor control unit.

Table Ͱ.ͮ͵ Odor Control Unit Replacement Cost Estimate Item Cost Estimate
Demolition ͈ͯ,ͬͬͬ
Odor Control Unit ͈ʹ,ͬͬͬ
Electrical, Instrumentation, & Control ͈Ͱ,ͬͬͬ
Subtotal ͈ͭͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈͵,ͬͬͬ
Total Estimated Construction Costs ͈ͮͰ,ͬͬͬ
Engineering and Administration Fees ͈ͱ,ͬͬͬ
Total Estimated Project Cost ͈ͮ͵,ͬͬͬ
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4.3.6 Replace Plug at RPS/Carlsbad Interconnect
Replacing the plug between the RPS and the City of Carlsbad with a valve is recommended to prevent the plug from failing and to make access to the plug easier. To access the plug, excavation, backfill, and repair of the asphalt will be required. The plug will be replaced with a ͭͬ-inch full port plug valve and will require ͭͬ-inch couplings on each side.

To divert flow to the El Fuerte Pump Station, a sewer plug will be required. As a result, this project should occur at the same time as other work requiring flow diversion.

Before work begins, the adjacent storm drain will need to be removed. The drain will need to be replaced upon completion.

Table Ͱ.ͯͬ provides the project cost estimate for the plug replacement.

Table Ͱ.ͯͬ Interconnect Plug Replacement Cost Estimate Item Cost Estimate
Excavation, Backfill, Asphalt Repair ͈ͯ,ͬͬͬ
Full Port ͭͬ" Plug Valve ͈Ͱ,ͬͬͬ
ͭͬ" Couplings ͈ͮ,ͬͬͬ
Sewer Plugs ͈ͱ,ͬͬͬ
Storm Drain Removal and Replacement ͈ͭͬ,ͬͬͬ
Subtotal ͈ͮͰ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͭͯ,ͬͬͬ
Total Estimated Construction Costs ͈ͯͳ,ͬͬͬ
Engineering and Administration Fees ͈ͳ,ͬͬͬ
Total Estimated Project Cost ͈ͰͰ,ͬͬͬ

4.3.7 Wet Well Scum Prevention
To reduce scum buildup in the wet well, the system should be back flushed about once a month to remove clogs form the pumps and surrounding piping. Operators have developed a "backyard engineered" solution of closing the appropriate forcemain valve to isolate two pumps, then opening the valve to allow flow from the unclogged pump to flow backwards through the clogged pump/pipe, forcing the clog back into the wet well. Though a better solution for clearing the clogs may be explored, the grinder improvements would likely alleviate the problem.

Another way to reduce buildup in the wet well is to install a wastewater conditioning and cleaning system by Anue Water Technologies. This wet well sprayer is a newer technology, and, as such, has not been thoroughly tested. Although promising, this technology needs further evaluation before a recommendation can be made. Furthermore, it is not suitable for the influent channel, and no other technology for that application was found. 05/13/2025 C9 484 of 1078 PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-ͮ͵
Table Ͱ.ͯͭ provides the project cost estimate for the sprayer technology if it's deemed suitable.

However, this project is not included in the Consolidated Rehabilitation Items CIP.

Table Ͱ.ͯͭ Wet Well Sprayer Cost Estimate
Item Cost Estimate
Anue Sprayer ͈ͰͰ,ͬͬͬ
Subtotal ͈ͰͰ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͱ,ͬͬͬ
Total Estimated Construction Costs ͈Ͳ͵,ͬͬͬ
Engineering and Administration Fees ͈ͭͰ,ͬͬͬ
Total Estimated Project Cost ͈ʹͯ,ͬͬͬ

4.3.8 Exhaust Fan Replacement
Installing a centrifugal exhaust fan, rated for Ͳͬͬ CFM, with a ͬ.ͱ hp fan motor is recommended to meet the NFPA ʹͮͬ standard at approximately ͭͮ.ͳ ACH.

Table Ͱ.ͯͮ provides the project cost estimate for the exhaust fan replacement.

Table Ͱ.ͯͮ Exhaust Fan Replacement Cost Estimate
Item Cost Estimate
Exhaust Fan, Ͳͬͬ CFM ͈ͱ,ͬͬͬ
Fan Motor, ͬ.ͱ hp ͈ͭ,ͬͬͬ
Subtotal ͈Ͳ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͯ,ͬͬͬ
Total Estimated Construction Costs ͈͵,ͬͬͬ
Engineering and Administration Fees ͈ͮ,ͬͬͬ
Total Estimated Project Cost ͈ͭͭ,ͬͬͬ

4.3.9 Pressure Surge Improvements
There is currently no pressure surge protection at RPS. The low flow at the pump station makes it unlikely that a pressure surge originating at the RPS would propagate into the BSD forcemain but a surge event originating at the RPS could damage the ʹ-inch forcemain between the RPS and the BSD forcemain. A complete pressure surge analysis is recommended for the RPS which may result in mitigation measures such as a surge protection system and/or air relief valves. For planning purposes, an assumption was made that a ͭ,ͬͬͬ gallon surge tank will be recommended as well as two air relief valves along the ͭ,ͳͬͬ foot forcemain.

The proposed surge control system includes a ͭ,ͬͬͬ gallon hydropneumatic surge tank with automatic level controls, air compressor, and control panels. The tank is approximately ͭͬ feet in length and ͱ feet in diameter and would be supported by steel legs or saddles. The level sensors and transmitter can be either a single capacitance probe of a differential pressure transmitter.

The air compressor system includes its own control panel and requires an estimated ͮ hp for the 05/13/2025 C9 485 of 1078
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motor. The system also comes with the necessary safety and solenoid valves as well as check valves and a pressure gauge for air flow control.

The vacuum relief /air inlet valves will allow air into the forcemain and decrease the potential for vapor pressure conditions which could damage the forcemain and pump station equipment. It is assumed that valves will be recommended at both vertical inflection points, STA ͯ +ͳͬ at an elevation of ͯͬͭ feet, and STA ʹ +Ͳʹ.ͱͳ at an elevation of ͮ͵ͳ.ͱ feet. The Ͱ-inch combination vacuum relief air inlet valves should be duplicated for redundancy and should be accompanied by a detailed and sustained maintenance program to ensure it is in good working order.

Table Ͱ.ͯͯ provides the project cost estimate for surge protection improvements.

Table Ͱ.ͯͯ Pressure Surge Improvements Cost Estimate
Item Cost Estimate
Surge Control System (with ͭ,ͬͬͬ gallon tank)4 ͈ͳͬ,ͬͬͬ
Site preparation (earthwork, foundation, piping) ͈ͳͯ,ͬͬͬ Electrical (ͮͱ%) ͈ͯͲ,ͬͬͬ
Vacuum Relief Valves (ͮ) ͈ͭͬͬ,ͬͬͬ
Subtotal ͈ͮͳ͵,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͭͱͱ,ͬͬͬ
Total Estimated Construction Costs ͈ͰͯͰ,ͬͬͬ
Engineering and Administration Fees ͈ʹͳ,ͬͬͬ
Total Estimated Project Cost ͈ͱͮͭ,ͬͬͬ

4.3.10 Assets Nearing End of Useful Life
The following assets need to be replaced in the next five to ten years because of age and original useful life. Section Ͱ.ͭ.ͭͯ describes the method for determining which assets need replacement. x All VFDs, fencing, the channel grinder, automatic transfer switch, and pumps #ͮ and #ͯ as requiring condition assessment by ͮͬͭʹ based on the equipment's installation year.

The VFDs will be replaced as part of the current project. The channel grinder will be replaced with dual channel grinders under the same project and scheduled to be completed in ͮͬͭͲ.
x The fencing has been included in the Building and Site Items CIP, with a recommendation to replace the existing chain-link fence with an ʹ-foot candy cane style security fencing to reduce site intrusion.

The ATS was installed in ͮͬͬͳ, and given an original useful life of ͭͬ years in the RCAMP, but the methodology used for Carollo's condition assessment assigns an OUL of ͯͬ years, pushing its RUL to ͮͭ years. Based on the results of the condition assessment and subsequent evaluation, the evRUL is ͯͬ years and the associated risk is very low. The ATS is not recommended for rehabilitation or replacement at this time.

4 The Surge Control System includes a ͭ,ͬͬͬ gallon surge tank, air compressor with control panel, level sensor and control panel, associated valves and couplings/connectors. 05/13/2025 C9 486 of 1078
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With six years remaining of the OUL, and an evRUL of ͭͮ years on pumps and ͮ and ͯ of the three ͳͱ-hp submersible pumps, they could be rehabilitated within the next five years to prolong their useful lives. As with any rehabilitation, maintenance costs increase over time and performance would decrease.

Because of maintenance costs and performance issues, and due to extreme ragging at Raceway from the upstream customers, replacing all three pumps with chopper pumps is recommended near the evRUL in nine years. The added capacity for dealing with solids and ragging would provide more protection if a grinder fails or is removed for maintenance.

Table Ͱ.ͯͰ provides the project cost estimate for the assets nearing the end of their useful lives.

Table Ͱ.ͯͰ Assets Nearing End of Useful Life Cost Estimate Item Cost Estimate
Vaughan Chopper Pumps (ͯ) ͈ͳͱ,ͬͬͬ
Electrical, Instrumentation, & Control ͈ͮͬ,ͬͬͬ
Subtotal ͈͵ͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈Ͱͳ,ͬͬͬ
Total Estimated Construction Costs ͈ͭͰͮ,ͬͬͬ
Engineering and Administration Fees ͈ͮʹ,ͬͬͬ
Total Estimated Project Cost ͈ͭͳͬ,ͬͬͬ

4.3.11 V & A Recommendations
V & A's evaluation identified additional projects.

Because the concrete overflow storage reservoir is in good condition aside from the cracks and joints in the concrete, V & A recommended sealing the points of infiltration within the reservoir to remediate infiltration. Recoating the entire surface of the pond was recommended previously for another project.

The concrete at the base of the guardrail surrounding the reservoir is spalled due to the lack of insulation between the concrete and aluminum. The report also recommends installing grout or sealant at the base of the guardrail around the reservoir. The grout or sealant will drain water from the post holes. The CIP covering improvements to the pump station include replacing the curb and handrail because the existing cracks are large.

To prevent further deterioration on the electrical equipment, recoating and replacing the corroded conduits is recommended. The flange near Pump ͯ is also recommended for recoating or replacement because of coating failure.

The recoating is included in a project with an initial repair and recoating project followed by an annual maintenance program. Surfaces should be prepared appropriately before applying a ͭͬͬ percent solids epoxy or polyurethane coating system.

Replacing the conduits at the electrical box also requires replacing the motor cable between the pump and the electrical box, replacing the conduit housing, and installing a sealing compound that seals the fitting and hardens around the cables inside. 05/13/2025 C9 487 of 1078
CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-ͯͮ | AUGUST ͮͬͭͲ | FINAL
Table Ͱ.ͯͱ provides the project cost estimate for the Raceway project.

Table Ͱ.ͯͱ V & A Raceway Project Cost Estimate
Item Cost Estimate
Conduit Replacement ͈ͱ,ͬͬͬ
Subtotal ͈ͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͯ,ͬͬͬ
Total Estimated Construction Costs ͈ʹ,ͬͬͬ
Engineering and Administration Fees ͈ͮ,ͬͬͬ
Total Estimated Project Cost ͈ͭͬ,ͬͬͬ

4.3.12 Raceway Pump Station CIP Summary
Table Ͱ.ͯͲ summarizes the projects underway and CIP projects recommended for RPS.

Table Ͱ.ͯͲ Raceway Pump Station CIP Summary
CIP Recommendations
Item Cost Estimate
Building and Site Items ͈͵ͳ,ͬͬͬ
Emergency Overflow Storage Pond ͈ͭʹͳ,ͬͬͬ
Odor Control Unit ͈ͮ͵,ͬͬͬ
Plug Replacement ͈ͰͰ,ͬͬͬ
Exhaust Fan Replacement ͈ͭͭ,ͬͬͬ
Pressure Surge Improvements ͈ͱͮͭ,ͬͬͬ
Assets Nearing End of Useful Life ͈ͭͳͬ,ͬͬͬ
V&A Recommendations ͈ͭͬ,ͬͬͬ
Total CIP Recommendations ͈ͭ,ͬͲ͵,ͬͬͬ
Projects Underway
Item Cost Estimate
Sewage Grinder Improvements ͈ͭͲͭ,ͬͬͬ
PLC Replacement ͈ʹʹ,ͬͬͬ
Total Projects Underway ͈ͮͰ͵,ͬͬͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-ͯͯ

4.4 Buena Creek Pump Station

4.4.1 Building Items and Site Work
Approximately ͭͰ,ͬͬͬ square feet of asphalt area in the pump station compound and access road is recommended for resurfacing with a ͯ-inch thick asphalt layer and tack coat. The asphalt around the seven manholes at the pump station shall be applied so they are at grade level of the manholes. As previously discussed, it is recommended that EWA implement a maintenance program after rehabilitation to improve the asphalt's life and appearance.

Installing a ͯ-foot wide by ͭ-foot tall earth berm between the creek and the pump station fence would direct the flow to the desired area would protect the creek. The berm should be approximately ͮͬͬ feet long.

The Ͳ-foot chain-link fence with barbed wire should be replaced with an ʹ-foot fence to make illegal access more difficult. City of Vista Ordinance ͮͬͬͯ-ͯ, Section ͭʹ.ͬͮ.ͯͬͬF precludes the use of barbed or razor wire security fencing within the city limits, but candy-cane style security fencing is acceptable. Thus, the existing fence and gates are recommended for replacement with candy-cane style security fence and gates. The estimate includes approximately ͰͲͬ linear feet of perimeter fencing, one traffic gate, and two walk gates.

Installing concrete stairs is recommended to facilitate access to the SDG&E meter on the east side of the pump station. Erosion control will also be necessary to protect the slope from further deterioration.

EWA staff requested recommendations for an existing area to stage emergency equipment or for adding a staging area to the site plan. This would facilitate response during an emergency.

The ͭʹ-inch and ͮͭ-inch influent flow can be captured from multiple.

To remediate groundwater infiltration in the pump station's west all, hydrophilic or hydrophobic crack injection is recommended. Although the estimate is for a single application, multiple applications may be required to resolve the leak.

Replacing the pilot lights on the pump return control panel is recommended.

An initial project to repair chips and recoat or repaint the metal equipment and piping at the pump station is recommended. The surfaces should be prepared before installing a ͭͬͬ percent solids epoxy or polyurethane coating system. Implementing a program involving annual touch- up applications is also recommended to keep all coatings and paint intact. The cost for annual touch-up and maintenance is estimated to be approximately ͈ͯ,ͬͬͬ per pump station. 05/13/2025 C9 489 of 1078
CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-ͯͰ | AUGUST ͮͬͭͲ | FINAL
Table Ͱ.ͯͳ provides the project cost estimate for building and site work.

Table Ͱ.ͯͳ Building and Site Work Cost Estimate
Item Cost Estimate
Berm ͈ͮ,ͬͬͬ
Access Stairs to SDG&E Meter Cabinet ͈ͮʹ,ͬͬͬ
Erosion Control ͈ͭ,ͬͬͬ
Crack Injection in Pump Room ͈ͭ,ͬͬͬ
Painting and Coating, Initial Repair and
Application ͈ͭͬ,ͬͬͬ
Pump Return Control Panel Pilot Lights ͈ͭ,ͬͬͬ
Asphalt ͈ͮͲ,ͬͬͬ
Fence ͈ͯͱ,ͬͬͬ
Subtotal ͈ͭͬͰ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͱ͵,ͬͬͬ
Total Estimated Construction Costs ͈ͭͲͮ,ͬͬͬ
Engineering and Administration Fees ͈ͯͮ,ͬͬͬ
Total Estimated Project Cost ͈ͭ͵ͱ,ͬͬͬ

4.4.2 VFD and PLC Replacement
The PLC and VFD Nos. ͭ-ͱ are obsolete and are scheduled for replacement during the current project. Integrating a true data connection into the PLC replacement is recommended to expedite the reporting requirements and eliminate discrepancies between data and SCADA. The flow meter displays should also be relocated outside of the new PLC cabinet to give operators access and the cabinet can remain locked.

Table Ͱ.ͯʹ provides the project cost estimate for VFD and PLC replacement. The Total Estimated Construction Costs do not include engineering design costs. Design cost estimates are provided to the client separately as the design work is being completed concurrently with this report.

Table Ͱ.ͯʹ VFD and PLC Replacement Cost Estimate
Item Cost Estimate
General Conditions & Mob/De-mob (ͭͬ%) ͈ͭͬͳ,ͬͬͬ
Site Construction ͈ͱͯͮ,ͬͬͬ
Electrical ͈ͯͬͲ,ͬͬͬ
Instrumentation and Control ͈͵ͯ,ͬͬͬ
Total Estimated Construction Costs 5 ͈ͭ,ͬͯʹ,ͬͬͬ

5 Total Estimated Construction Costs do not include engineering design costs. Design cost estimates are provided separately as the design work is being completed concurrently with this report. 05/13/2025 C9 490 of 1078
PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-ͯͱ

4.4.3 Redundant Forcemain
The existing excess effluent line is unsuitable for repurposing as a redundant forcemain. The existing alignment can handle the current average flow of ͮ.ͭ mgd (ͭͰͯͬ gpm), but it barely meets the design constraint of a maximum of ͭͱͱ feet of total dynamic head. With all five pumps running at ͭͬͬ percent, the excess effluent pipeline cannot handle the current peak flow of Ͱ.Ͱ mgd, let alone the predicted future flow or design flow. Figure Ͱ.͵ shows the system curve and pump curves for the existing excess effluent pipeline.

Figure Ͱ.͵ Existing Excess Effluent Alignment System and Pump Curves The issues begin with a segment of pipe from the pump room through an exterior wall that is ʹ inches in diameter, resulting in very high flow velocities. If this alignment is repurposed for use as a forcemain, the pipe would need to be modified from within the pump station building to the point of expansion to a diameter of ͭͰ inches.

As an alternative, pipe bursting was explored as a way to install a new pipeline in place of the current excess effluent alignment downstream of the pump station. However, this process unsuitable, since upsizing from ͭͰ to ͮͰ or ͯͬ inches exceeds the typical rule of thumb of a maximum increase of ͭͮͱ to ͭͯͬ percent of the original pipe size.

Furthermore, the increased pipe size would likely displace a considerable amount of soil. Given the pipeline's shallow depth, soil would likely be displaced upward, displacing other utilities and alignments in the area.

The abandoned forcemain was also brought up as a possible alternative alignment. However, the current condition and the reasons it was originally abandoned are not known and would require further investigation. Furthermore, sections of the alignment are asbestos concrete pipe and would require replacement or CIPP for repurposing.

Figure Ͱ.ͭͬ shows the locations of existing pipelines near the BCPS, the BSD forcemain, and the BSD gravity outfall.
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CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-ͯͲ | AUGUST ͮͬͭͲ | FINAL
Figure Ͱ.ͭͬ Existing Pipelines
Ultimately, five alternative alignments were identified, including the route the existing excess effluent alignment follows. All alignments begin at the pump station and terminate at the BSD gravity outfall located northeast of the intersection of El Camino Real and Palomar Airport Road.

A hydraulic analysis was performed on each alignment. The hydraulic analysis was done to ensure that appropriate velocities were maintained along the forcemain and to determine the required pipe diameter. For this evaluation, an assumption was made that minor losses along the reach would be similar to the existing forcemain.

According to the hydraulic analysis, each alternative can handle up to the pump station design flow of ʹ.ʹ mgd while maintaining a velocity consistent with preventing deposition. Three of the alternative alignments terminate in a ͯͬ-inch pipe, while the other two meet design criteria with a ͮͰ-inch pipe. None of the alternatives investigated include provisions for connection to the RPS.

Currently, backup for the Raceway forcemain is provided by the ability to divert flow to the City of Carlsbad's El Fuerte Pump Station. If a connection from the RPS to the new forcemain is desired, all but one alternative would enable a new parallel forcemain to be installed next to the existing Raceway line and connect to the BSD forcemain in the same location as the existing connection.

In addition to the hydraulic analysis, a non-cost evaluation was performed. This evaluation was based on community disruption, construction impact, permitting and environmental concerns, easement acquisition and right-of-way issues, utilities, and hydraulics. Each category was weighted according to its impact on construction.
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Table Ͱ.ͯ͵ ranks each criteria from a score of ͭ to ͱ, with one being least desirable and ͱ being most favorable. Ranking weight and individual scores can be tailored to suit the City's needs and preferences. The non-cost evaluation is located in Appendix L.

Table Ͱ.ͯ͵ Non-cost Evaluation Criteria Ranking
Criteria Ranking Weight
Community Disruption ͮͱ%
Construction Impact ͮͱ%
Permitting/Environmental ͭͬ%
Easement Acquisition/ROW ͭͬ%
Utilities ͭͬ%
Hydraulics ͮͬ%

4.4.3.1 Alternative 1 - South Melrose/Faraday/Orion Route Alternative ͭ was ranked third of the five alternatives. Its final score may increase, since the City's desire to stay out of canyons could change criteria scores.

The proposed route for Alternative ͭ follows portions of the existing excess effluent and abandoned forcemain lines, exiting the pump station adjacent to the creek heading west. The alignment consists of approximately ͭͲ,ͱͬͬ feet of ͯͬ inch diameter HDPE and follows South Melrose Drive south to Faraday Avenue, where it continues west. At the intersection of Faraday and Orion Road, the alignment turns to the south, following Orion until it nears El Camino Real.

There, it follows an easement that parallels the road and ties into the existing gravity outfall.

Faraday and Orion are both low volume roads, but South Melrose Drive is a high volume road.

Most of the pipeline does follow existing roads, which reduces the impact of construction to the area. However, it necessitates traffic control along most of the alignment.

This alternative avoids green spaces and canyons, which the City prefers. The only exception is the reach leaving the pump station toward South Melrose. Most of the alignment follows the alignment of existing pipelines.

There are potential utility conflicts along the route and numerous utilities located at the intersection of South Melrose and Faraday. Thus, encroachment permits are expected to be required. Furthermore, Orion is privately owned, creating an issue with easement acquisition of right-of-way not associated with the other alternatives.

Figure Ͱ.ͭͭ shows the route for Alternative ͭ.
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CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-ͯʹ | AUGUST ͮͬͭͲ | FINAL
Figure Ͱ.ͭͭ Alternative ͭ - South Melrose/Faraday/Orion Route

4.4.3.2 Alternative 2 - South Melrose/Faraday/Canyon Route Alternative ͮ ranks second among the five alternatives.

Alternative ͮ is the shortest reach at approximately ͭͰ,͵ͬͬ feet of ͮͰ inch HDPE pipe. The alignment exits the pump station and follows the same route west to South Melrose Road as Alternative ͭ, except it runs from Faraday directly along the path of the existing BSD forcemain to the gravity outfall rather than continuing onto privately owned Orion.

The majority of the alignment follows existing roads and pipelines and lies within the right-of- way, although traffic control will be required. Pipeline within green spaces and canyons is minimized, with the segment near the pump station and the segment from Faraday to the gravity outfall being the only sections not following an existing road.

Utility conflicts are similar to Alternative ͭ, with numerous utilities at the intersection of South Melrose and Faraday. This alignment meets hydraulic requirements with a smaller diameter pipe than three of the other alignments and the shortest length, reducing material and construction costs.

Figure Ͱ.ͭͮ shows the alignment for Alternative ͮ.
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PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-ͯ͵
Figure Ͱ.ͭͮ Alternative ͮ - South Melrose/Faraday/Canyon Route

4.4.3.3 Alternative 3 - South Melrose/Palomar Airport Road Route Alternative ͯ ranks fourth among the alternatives.

Alternative ͯ consists of approximately ͭͲ,͵ͬͬ feet of ͯͬ-inch HDPE. As it leaves the pump station, the alignment follows the previously described alternatives but continues on South Melrose to the intersection at Palomar Airport Road. There, it heads west and connects to the gravity outfall along the easement adjacent to El Camino Real.

The construction impact is low, since the pipeline lies within the right-of-way of an existing road.

However, almost the entire alignment is in high-volume roads, necessitating traffic control and representing a significant disruption along busy Palomar Airport Road. Thus, a short-term easement may be required in addition to encroachment permitting.

The intersection at South Melrose and Faraday has numerous utilities, and additional conflicts are expected along Palomar Airport Road. The alignment requires a creek crossing along South Melrose. This crossing creates additional issues not addressed in this evaluation but in need of more investigation if this alternative is considered.

Although the tie-in of a redundant forcemain coming from Raceway has not been investigated, Alternative ͯ would require such a forcemain to be routed east rather than parallel to the current forcemain, which exits the pump station to the north.

This alignment has the second longest reach of the alternatives, as well as the larger pipe diameter. This reach and diameter increase material and construction costs.

Figure Ͱ.ͭͯ shows the alignment for Alternative ͯ.
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CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-Ͱͬ | AUGUST ͮͬͭͲ | FINAL
Figure Ͱ.ͭͯ Alternative ͮ - South Melrose/Faraday/Canyon Route

4.4.3.4 Alternative 4 - South Melrose/Faraday/El Fuerte/Palomar Airport Road Route Alternative Ͱ is the lowest ranking of the alternatives, primarily due to community disruption and construction impact and costs.

Alternative Ͱ is the longest of the investigated alignments at ͭ͵,ͯͬͬ feet of ͯͬ inch HDPE. Thus, the material and construction costs for this alternative are expected to be the highest.

The alignment exits the pump station to the west following the same route as the others, then continues along the path of the existing forcemain down South Melrose and west on Faraday.

The alignment turns to the south, following El Fuerte Street to Palomar Airport Road, where it turns west, connecting to the gravity outfall along the easement adjacent to El Camino Real.

All but the segment of pipeline form the pump station to South Melrose lie within the right-of- way on existing roads. Although this reduces construction impact, it necessitates traffic control, since nearly the entire route lies in high volume roads.

Community disruption and construction impact would be significant with a construction project of this size occurring on such busy roads. The alignment avoids green spaces and canyons, but short term easement and encroachment permitting are expected.

There are potential utility conflicts at intersections and along Palomar Airport Road and El Fuerte, along with known numerous utility conflicts at Faraday and South Melrose.

Figure Ͱ.ͭͰ shows the alignment for Alternative Ͱ.
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PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-Ͱͭ
Figure Ͱ.ͭͰ Alternative Ͱ - South Melrose/Faraday/El Fuerte/Palomar Airport Road Route

4.4.3.5 Alternative 5 - Excess Effluent Alignment Route This alternative is the highest ranked because of its low community disruption and construction impact and its minimized utility conflicts.

As previously mentioned, the existing excess effluent line is not suitable for repurposing as a redundant forcemain, but the pipeline's location was evaluated as an alternative for a new redundant forcemain.

The alignment exits the pump station to the west toward South Melrose Drive then south. From there, it heads west on Faraday to where the RPS forcemain connects to the BSD forcemain. At this point, the alignment follows the RPS forcemain south, then turns west through the green space over to El Fuerte where it heads north to Faraday.

The alignment consists of approximately ͭͲ,ͮͬͬ feet of ͮͰ-inch HDPE. The smaller diameter pipe and the second shortest reach of evaluated alignments contribute to lower material and construction costs.

The segment along Faraday is partially in the road and partially in the green space to the north of the road, until it again cuts south through the green space and canyons to the gravity outfall.

This alternative requires the least amount of traffic control, since about half of the reach is in green space, avoiding high volume roads as much as possible and minimizing community disruption.

No major permitting issues are expected, but the green space is an environmentally sensitive area and precautions must be taken to minimize disruption. The existing excess effluent line would need to be demolished to make room for a new pipeline to be installed. However, space for the new pipe is available, which resolves utility conflicts, and no new easements are required. 05/13/2025 C9 497 of 1078
CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-Ͱͮ | AUGUST ͮͬͭͲ | FINAL
Figure Ͱ.ͭͱ shows the alignment for Alternative ͱ.

Figure Ͱ.ͭͱ Alternative ͱ - Excess Effluent Alignment Route To summarize:
x Alternative ͱ is the highest scoring alignment, with the second shortest reach at ͭͲ,ͬͬͬ.

This alternative follows the route of the existing excess effluent line, but potential utility conflicts do exist.
x Alternative ͮ is ranked second. The majority of this alternative follows the alignment of the existing forcemain. However, this Alternative scored lower in the community disruption category, since the majority is along roads and would require traffic control. x Alternatives ͯ and Ͱ scored low primarily because numerous utility conflicts are likely along Palomar Airport Road.
x The final score of Alternative ͭ may increase, since the City's desire to stay out of canyons could change criteria scores.

Table Ͱ.Ͱͬ presents the final score for each alignment.

Table Ͱ.Ͱͬ Non-Cost Evaluation Final Scores
Alternative Final Score
ͭ - South Melrose/Faraday/Orion Route ͯ.ͬͬ
ͮ - South Melrose/Faraday/Canyon Route ͯ.ͯͱ
ͯ - South Melrose/Palomar Airport Road Route ͮ.ͯͱ
Ͱ - South Melrose/Faraday/El Fuerte/Palomar
Airport Road Route ͭ.ʹͬ
ͱ - Excess Effluent Alignment Route ͯ.͵ͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-Ͱͯ
While the existing effluent line is not suitable for repurposing as a redundant forcemain primarily due to hydraulics, Alternative ͱ presents the most favorable site for installing a new forcemain.

The alignment is longer than Alignment ͮ, at ͭͲ,ͮͬͬ feet compared to ͭͰ,͵ͬͬ feet, so it will be slightly more expensive. However, its primary advantage is the space.

The new pipeline can be installed where the current excess effluent line is located, shown in Figure Ͱ.ͭͱ. Alternatively, if it is determined adequate space and minimal conflicts exist along Faraday, that route could be utilized.

Table Ͱ.Ͱͭ provides the project cost estimate for Alternative ͱ Redundant Forcemain.

Table Ͱ.Ͱͭ Redundant Forcemain Cost Estimate
Item Cost Estimate
ͮͰ-inch HDPE Forcemain ͈Ͱ,ͮʹͰ,ͬͬͬ
Subtotal ͈Ͱ,ͮʹͰ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮ,ͯͳͲ,ͬͬͬ
Total Estimated Construction Costs ͈Ͳ,ͲͲͬ,ͬͬͬ
Engineering and Administration Fees ͈ͭ,ͯͯͮ,ͬͬͬ
Total Estimated Project Cost ͈ͳ,͵͵ͮ,ͬͬͬ

4.4.4 Valve Replacement
Because of corrosion and leakage, the forcemain plug valves and the isolation and discharge valves should be replaced. Two replacement isolation valves are on hand for installation at Pumps No. Ͱ and ͱ.

The Motor Operated Valves at Pumps No. ͮ and ͯ also need to be replaced. Six plug valves are not currently installed with the seating side of the valve on the seated side of the system. New plug valves will be installed according to the manufacturer's recommendation.

Plug valve replacement includes three ʹ-inch plug valves, seventeen ͭͮ-inch plug valves, three ͭͰ-inch plug valves, one ͮͰ-inch plug valve, including the motor-operated valves.

The emergency shut-off check valves at each pump discharge side are recommended for replacement because of leaking and potential problems with the hydraulic dampers that cause the valve to close too slowly when activated.

In the current configuration, Pump Nos. ͮ and ͯ tend to air-lock on the suction side during start- up after having been offline. Possible contributors to the problem include leaking gaskets and expansion joints on the suction piping. It is recommended that the gaskets and expansion joints along the suction piping for Pump Nos. ͮ and ͯ are replaced along with the valves.

The structural analysis that is recommended in a subsequent section should include an investigation into, and mitigation measures for, preventing air-locking of the pumps if the problem persists following gasket and joint replacement. 05/13/2025 C9 499 of 1078
CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-ͰͰ | AUGUST ͮͬͭͲ | FINAL
Table Ͱ.Ͱͮ provides the project cost estimate for valve replacement.

Table Ͱ.Ͱͮ Valve Replacement Cost Estimate
Item Cost Estimate
Plug Valves, ʹ-inch ͈ͱ,ͬͬͬ
Plug Valves, ͭͮ-inch ͈Ͱͯ,ͬͬͬ
Plug Valves, ͭͰ-inch ͈ͭͮ,ͬͬͬ
Plug Valves, ͮͰ-inch ͈ͭͭ,ͬͬͬ
Motor Operated Valves, ͭͮ-inch ͈ͭͲ,ͬͬͬ
Check Valves, ͭͮ-inch ͈ͯʹ,ͬͬͬ
Gasket and Expansion Joints ͈ͮͬ,ͬͬͬ
Subtotal ͈ͭͮͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈Ͳ͵,ͬͬͬ
Total Estimated Construction Costs ͈ͭ͵Ͱ,ͬͬͬ
Engineering and Administration Fees ͈ͯ͵,ͬͬͬ
Total Estimated Project Cost ͈ͮͯͯ,ͬͬͬ

4.4.5 Wet Well Liner Replacement and Sluice Gate Repair The sluice gate that divides the wet well requires new seals. The two slide gates upstream of the sewage grinders at the entrance to the wet well also need new seals. The stop logs at the entrance to the wet well should be replaced as well. Gate repairs and stop log and liner replacement are scheduled for the current project.

The entire surface area of the wet well, approximately ͱ,ͬͬͬ square feet, must be prepared for concrete repair and coating by sandblasting to remove the existing coating and any dirt or debris. An assumption was made that half the surface area will require concrete repair before the new coating can be installed.

The process is estimated to take ͭͰ days, during which bypass pumping is required to access the wet well while maintaining operations. It is recommended to perform all work requiring bypass pumping concurrently.

Table Ͱ.Ͱͯ provides the project cost estimate for replacement of the wet well liner and repairs of the gate seals and stop logs. The Total Estimated Construction Costs do not include engineering design costs. Design cost estimates are provided to the client separately as the design work is being completed concurrently with this report.

Table Ͱ.Ͱͯ Wet Well Liner and Sluice Gate Construction Cost Estimate Item Cost Estimate
General Conditions & Mob/De-mob (ͭͬ%) ͈Ͱʹ,ͬͬͬ
Wet Well Liner (Div. ͬͲ - Wood and Plastics) ͈Ͱͮͭ,ͬͬͬ
Equipment ͈ͱͲ,ͬͬͬ
Total Estimated Construction Costs ͈ͱͮͱ,ͬͬͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 4 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | Ͱ-Ͱͱ

4.4.6 Odor Control
To determine whether chemical injection might be appropriate for liquid phase odor control, Odalog sensors were placed in the wet well from January ͱ, ͮͬͭͲ to record sulfide levels. The sensors were collected on January ͭͯ, ͮͬͭͲ.

Results show an average sulfide concentration in the wet well of less than ͭ ppm, which agrees with pump station odor logs showing near zero sulfide at the inlet of the existing odor control unit. The results of the analysis can be found in Figure Ͱ.ͭͲ.

Figure Ͱ.ͭͲ Odalog Sensor Data
Liquid phase odor control is not recommended. To prevent further deterioration from exposure to the elements, the odor control unit is recommended for patching and painting the fiberglass housing, Figure Ͱ.ͭͳ. The pilot lights on the odor control panel are also recommended for replacement.
42 44
46 48
50 52
54 56
58 60
0 5
10 15
20 25
1/5/16 1/6/16 1/7/16 1/8/16 1/8/16 1/9/16 1/10/16 1/11/16 1/12/16 Temperature,°F
H2S Concentration, ppm
H2S Concentration Temperature,°F
Figure Ͱ.ͭͳ Odor Control Unit with Corrosion
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CITY OF VISTA | CHAPTER 4 | PUMP STATION REHABILITATION STUDY Ͱ-ͰͲ | AUGUST ͮͬͭͲ | FINAL
Table Ͱ.ͰͰ provides the cost estimate for the odor control unit rehabilitation project.

Table Ͱ.ͰͰ Odor Control Unit Rehabilitation Cost Estimate Item Cost Estimate
Patch and Paint Fiberglass ͈ͱ,ͬͬͬ
Blower Control Panel Pilot Lights ͈ͭ,ͬͬͬ
Total Estimated Project Cost ͈Ͳ,ͬͬͬ

4.4.7 Wet Well Scum Prevention
Staff reported similar scum build-up issues in the wet well as those at RPS. The wet well sprayer system by Anue Water Technologies might be suited to this application, but as previously stated, it is a newer technology, and has not been thoroughly tested. The pump station would require the installation of a sprayer in each wet well. While promising, it needs further evaluation before a recommendation can be made. Typical installation costs are included in the estimate.

The project cost estimate should the sprayer technology prove suitable for a future project is provided in Table Ͱ.Ͱͱ. This project is not included in the Consolidated Rehabilitation Items CIP.

Table Ͱ.Ͱͱ Wet Well Sprayer Cost Estimate
Item Cost Estimate
Wet Well Sprayers ͈ͭͬͯ,ͬͬͬ
Subtotal ͈ͭͬͯ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͱͳ,ͬͬͬ
Total Estimated Construction Costs ͈ͭͲͬ,ͬͬͬ
Engineering and Administration Fees ͈ͯͮ,ͬͬͬ
Total Estimated Project Cost ͈ͭ͵ͮ,ͬͬͬ

4.4.8 Automation of Gates
Installing motor operators on the slide gate and two slide gates in the wet well is recommended, Figure Ͱ.ͭʹ. These gates will facilitate operation and allow the gates to be periodically exercised for maintenance purposes. The three gates in the wet well are recommended for automation as well.

The wet well is a Class I Division ͭ space and requires that electrical components are appropriate for use in a hazardous area without venting.

Adding actuators to the existing Ͱ feet by Ͱ feet sluice gate that divides the wet well and the slide gates ahead of the grinders is recommended to add the flexibility of isolating flow remotely.

The project cost estimate includes all programming and installation required. The estimate assumes that all gates are in excellent condition, since the component of the actuator that engages the nut on the gate stem Figure Ͱ.ͭʹ Slide Gates to be
Automated in Wet Well
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is machined to specification for each gate. If the actuator does not fit precisely, age and deterioration of the stem of handwheel-operated gates can cause failure.

Table Ͱ.ͰͲ provides the project cost estimate for the automation of wet well gates.

Table Ͱ.ͰͲ Automation of Gates Cost Estimate
Item Cost Estimate
Sluice Gate Actuator ͈ͭͱ,ͬͬͬ
Slide Gate Actuators (ͮ) ͈ͯͬ,ͬͬͬ
Subtotal ͈Ͱͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͲ,ͬͬͬ
Total Estimated Construction Costs ͈ͳͭ,ͬͬͬ
Engineering and Administration Fees ͈ͭͰ,ͬͬͬ
Total Estimated Project Cost ͈ʹͱ,ͬͬͬ

4.4.9 Exhaust Fan Replacement
The existing supply fan feeds both the pump and motor rooms and is undersized at ͱͬͬͬ CFM, providing only ͵ air changes per hour, below the NFPA ʹͮͬ standard. To meet the ͭͮ ACH standard, replacing the existing supply fan is recommended. The fan should be replaced with a centrifugal roof supply fan rated for ͳͬͬͬ CFM, with a ͯ hp fan motor.

Table Ͱ.Ͱͳ provides the project cost estimate for fan replacement.

Table Ͱ.Ͱͳ Exhaust Fan Replacement Cost Estimate
Item Cost Estimate
Pump Room Exhaust Fan, ͭͮͬͬ CFM ͈ͱ,ͱͬͬ
Fan Motor, ͭ.ͱ hp ͈ͭ,ͱͬͬ
Roof Supply Fan, ͳͬͬͬ CFM ͈ͳ,ͬͬͬ
Fan Motor, ͯ hp ͈ͮ,ͬͬͬ
Subtotal ͈ͭͲ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈͵,ͬͬͬ
Total Estimated Construction Costs ͈ͮͱ,ͬͬͬ
Engineering and Administration Fees ͈ͱ,ͬͬͬ
Total Estimated Project Cost ͈ͯͬ,ͬͬͬ

4.4.10 Pump Selection Programming
Currently, the pumps are programmed to automatically be designated as lead, lag or standby.

The EWA operations staff has requested new programming to allow them to choose the pump sequence in any order. This would provide the operators with increased flexibility to adjust operating sequence to meet current conditions and for maintenance procedures. 05/13/2025 C9 503 of 1078
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Table Ͱ.Ͱʹ provides the project cost estimate for the pump selection programming.

Table Ͱ.Ͱʹ Pump Selection Programming Cost Estimate
Item Cost Estimate
Programming ͈ͭͬͬ,ͬͬͬ
Total Estimated Project Cost ͈ͭͬͬ,ͬͬͬ

4.4.11 Pressure Surge Improvements
The screening-level surge evaluation determined that the existing surge tank at the BCPS is likely sufficient to provide protection against a pressure downsurge wave that could be caused by pump failure, uncontrolled valve speed, or a pipeline rupture. A pressure surge analysis is recommended to determine specific mitigation measures for the BCPS. For planning purposes, it is assumed that a larger surge protection system will be recommended to adequately protect the BCPS from surge events.

The existing surge tank has a capacity of ͭ,ͬͬͬ gallons. For planning purposes, an assumption was made that a ͱ,ͬͬͬ gallon tank will be recommended following the pressure surge analysis.

The surge control system includes a ͱ,ͬͬͬ gallon hydropneumatic surge tank with automatic level controls, air compressor, and control panels. The tank is approximately ͭ͵ feet long and ͳ feet in diameter and would be supported by steel saddles in a horizontal position. The level sensors and transmitter can be either a single capacitance probe of a differential pressure transmitter. The air compressor system includes its own control panel and requires an estimated ͱ hp for the motor. The system also comes with the necessary safety and solenoid valves as well as check valves and a pressure gauge for air flow control.

The addition of vacuum relief valves along the pressurized portion of the BSD forcemain will allow air into the forcemain and increase the minimum pipeline pressures to decrease the potential for vapor pressure conditions resulting from a pipeline rupture. The initial surge evaluation recommended that a vacuum relief valve be installed at the vertical inflection point along the BSD forcemain at STA ͮ͵+ͳͰ, at an elevation of ͯ͵ͯ feet, to prevent negative pressures. The Ͱ-inch combination vacuum relief air inlet valve should be duplicated for redundancy and should be accompanied by a detailed and sustained maintenance program to ensure it remains in good working order. It is expected that additional valves will be recommended in the complete analysis. For planning purposes, an assumption was made that four valves will be recommended for installation along the forcemain between the BCPS and the gravity outfall, including the vertical inflection point. 05/13/2025 C9 504 of 1078
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Table Ͱ.Ͱ͵ provides the project cost estimate for surge protection improvements.

Table Ͱ.Ͱ͵ Pressure Surge Improvements Cost Estimate
Item Cost Estimate
Surge Control System (ͱ,ͬͬͬ gallon tank)6 ͈͵ͱ,ͬͬͬ
Site preparation (earthwork, foundation, piping) ͈͵ͯ,ͬͬͬ Electrical (ͮͱ%) ͈Ͱͳ,ͬͬͬ
Vacuum Relief Valves (Ͱ) ͈ͮͬͬ,ͬͬͬ
Subtotal ͈Ͱͯͱ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͮͰͮ,ͬͬͬ
Total Estimated Construction Costs ͈Ͳͳͳ,ͬͬͬ
Engineering and Administration Fees ͈ͭͯͱ,ͬͬͬ
Total Estimated Project Cost ͈ʹͭͮ,ͬͬͬ

4.4.12 Assets Nearing End of Useful Life
The following assets are expected to need replacement in the next five to ten years based on age and original useful life. Section Ͱ.ͭ.ͭͯ describes the method for determining the assets included.

Replacing Shadowridge ʹ-inch flanged flow meter is recommended to maintain flexibility to divert flow to SWRF during an emergency. Though the Encina Forcemain ͭͰ-inch flanged flow meter is in good condition, it has exceeded its original useful life. To ensure it functions properly, it is recommended for replacement.

Because staff safety depends on accurate gas and oxygen readings provided by the gas analyzer monitoring both wet and dry wells, the analyzer is recommended for replacement.

Rehabilitating the five ͭͮͱ-hp dry pit centrifugal pumps can extend their lives by approximately ten years. Thus, rehabilitation of all pumps within the next five years is recommended to keep them in optimal operating condition.

The City and the EWA expressed concerns that the pump station pump configuration is oversized for current flow conditions.

Table Ͱ.ͱͬ presents flow data provided by the EWA for current conditions and the future flow from the ͮͬͬʹ Sewer Master Plan Update. The current average flow is a quarter of the design capacity, and the current peak is half of the design capacity. 6 The Surge Control System includes a ͱ,ͬͬͬ gallon surge tank, air compressor with control panel, level sensor and control panel, associated valves and couplings/connectors. 05/13/2025 C9 505 of 1078
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Table Ͱ.ͱͬ BCPS: Flow Conditions
Flow Condition mgd
Current Average ͮ.ͭ
Current Peak Ͱ.Ͱ
Future Peak ͱ.ʹ
Design ʹ.ʹ
Table Ͱ.ͱͭ presents the capacity and valving information for each pump as well as its destination of discharge.

Table Ͱ.ͱͭ BCPS: Pump Configuration
Pump No.

Capacity Diversion Valve
Type
Discharge
Destinationgpm mgd
ͭ ͭ,ͳͯͲ ͮ.ͱͬ Manual SWRF or EWPCF
ͮͯ ,Ͳͬͬ ͱ .ͭʹ Motor-Operated SWRF or EWPCF
ͯ
ͮ,ͬͯͳ ͮ.͵ͯ
Motor-Operated SWRF or EWPCF
Ͱ --- EWPCF
ͱ --- EWPCF
Any of the five pumps can meet the current average flow demands and would require one pump for standby. Pump Nos. ͯ, Ͱ, and ͱ combined meet the pump station's design capacity and maintain flexibility to divert flow to either the SWRF or the EWPCF. However, a fourth pump would be needed for standby to handle spikes that might occur during wet weather, such as in ͮͬͭͬ when a peak of ͵.ͯͭ mgd was recorded.

Retiring one pump could also be considered. However, if the seals and valves are not exercised as a part of routine maintenance, the components will deteriorate. Thus, a more conservative approach is recommended to preserve the existing pumps' functionality.

The existing pumps have an EvRUL of twelve years, with rehabilitation recommended within the next five years. As the need for pump rehabilitation arises, the extra pump could be cannibalized for spare parts to keep the other pumps in optimal operating condition and extend the time before replacement is needed.

When the pumps require replacement, flow conditions need to be evaluated to determine whether all five pumps require replacement. Under current flow conditions, a configuration of one lead, two lag, and one standby pump would meet the needs of the pump station while maintaining flexibility to meet the design capacity and unusual short-duration peaks and to divert flow to either the SWRF or EWPCF. This configuration would also reduce the costs of asset replacement.

In case modifying the configuration is required, an evaluation of seismic vulnerability is recommended while the pumps are being rehabilitated or replaced.

Table Ͱ.ͱͮ provides the project cost estimate for the assets nearing the ends of their useful lives. 05/13/2025 C9 506 of 1078
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Table Ͱ.ͱͮ Assets Nearing End of Useful Life Cost Estimate Item Cost Estimate
Flow Meter, Shadowridge FM ʹ-inch flanged ͈ͭͬ,ͬͬͬ
Flow Meter, Encina FM ͭͰ-inch flanged ͈ͭͱ,ͬͬͬ
Gas Analyzer ͈ͱ,ͬͬͬ
Pump Rehabilitation (ͱ) ͈ͮͱ,ͬͬͬ
Adder for EI&C ͈ʹ,ͬͬͬ
Subtotal ͈Ͳͯ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͯͱ,ͬͬͬ
Total Estimated Construction Costs ͈͵ʹ,ͬͬͬ
Engineering and Administration Fees ͈ͮͬ,ͬͬͬ
Total Estimated Project Cost ͈ͭͭʹ,ͬͬͬ

4.4.13 V & A Recommendations
V & A's report provided additional recommendations for each pump station.

The corrosive soil environment, evidence of past infiltration, and the active leak in the pump room warrant further evaluation of the concrete and steel where staining is present. Evaluation to determine corrosion stimulants and corrosion potential, concrete characteristics, the placement and condition of reinforcing steel, and the extent of any damage that may be present should be considered.

Existing points of infiltration are recommended to be sealed at the construction joints, preferably after performing additional testing of the concrete. This will identify the appropriate remediation approach.

Crack injection to remediate infiltration was recommended in a previously described project. To prevent corrosion, repairing, and reapplying the coating to all metal equipment and piping is recommended. The recoating is included as part of the Building and Site Items project, with an initial repair and recoating project followed by an annual maintenance program. Surfaces need to be prepared appropriately before applying a ͭͬͬ percent solids epoxy or polyurethane coating system.

Evaluating the seismic vulnerability of the motors and pumps' inverted pendulum arrangement of is recommended to determine whether the arrangement creates an issue with respect to seismic loading.

The evaluation should examine whether suction and discharge flanges are strong enough to resist the forces that could result in those locations in an earthquake. Such a failure at the flanges could cause the dry well to flood. In a similar case, where a large pump motor broke free from the pump flange, the problem was remediated by installing a structural steel cage to prevent the motor form tipping over.
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Reed Electric's vibration analysis recommended additional testing when the pump station has a planned outage. This testing should include Pump No. ͯ, which was not completed because of electrical issues.

High vibration levels observed in most test locations, specifically the high and extremely high vibration levels on Pumps No. ͮ and No. ͭ, respectively, warrant detailed analysis and correction.

Inspecting the stiffness of pump supports for rigidity is recommended, as is a full structural mode shape analysis to identify resonance issues related to structure and to determine appropriate remediation measures.

A complete structural analysis is recommended to identify the seismic vulnerability of the pump and motor configuration and mitigation steps for seismic and vibration issues. As previously described, the analysis would begin with creating a model of the system and performing more in-depth testing. The analyses should recommend structural support and stiffening modifications (often saddle supports or hydraulic jacks), which can be temporarily installed.

Additional vibration data collection would follow the analyses to ensure the measures reduce vibration.

The pumps are recommended for rehabilitation within five years. Furthermore, performing a structural shape mode analysis is recommended before the pumps are reinstalled. This will identify resonance issues the current configuration presents and enable mitigation measures to be taken. The structural analysis should ensure that the pump replacement complies with the current code.

Because the existing excess effluent and forcemain pipelines are in a moderately to highly corrosive soil environment, cathodic protection should be considered if the pipelines are to remain in service for the next ͮͬ years. The excess effluent and abandoned sections of forcemain are not in service, and there are no plans to return them to service. Thus, cathodic protection is unnecessary along those alignments. Cathodic protection is also recommended for all metallic items, including ductile iron pipe and fittings and isolated metallic fittings located on PVC pipelines. A site-specific analysis is recommended to inventory all metallic items, to cross- reference the locations against measured soil data, and to design appropriate cathodic protection measures for each location.

It is recommended that new pipelines designed for installation within the region sampled are made of materials that will resist corrosion, such as plastic. The redundant forcemain proposed in a previously described project will be constructed of high-density polyethylene (HDPE) to resist corrosion.
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Table Ͱ.ͱͯ provides the project cost estimate for this work.

Table Ͱ.ͱͯ V & A Buena Creek Project Cost Estimate
Item Cost Estimate
Cathodic Protection ͈ͭ,ͬͬͬ,ͬͬͬ
Subtotal ͈ͭ,ͬͬͬ,ͬͬͬ
Contingencies, Contractor OH&P, Taxes ͈ͱͱͱ,ͬͬͬ
Total Estimated Construction Costs ͈ͭ,ͱͱͱ,ͬͬͬ
Engineering and Administration Fees ͈ͯͭͭ,ͬͬͬ
Total Estimated Project Cost ͈ͭ,ʹͲͲ,ͬͬͬ

4.4.14 Buena Creek Pump Station CIP Summary
Table Ͱ.ͱͰ summarizes the projects underway and CIP projects recommended for BCPS.

Table Ͱ.ͱͰ Buena Creek Pump Station CIP Summary
CIP Recommendations
Item Cost Estimate
Building Items and Site Work ͈ͭ͵ͱ,ͬͬͬ
Redundant Forcemain ͈ͳ,͵͵ͮ,ͬͬͬ
Valve Replacement ͈ͮͯͯ,ͬͬͬ
Odor Control Unit Rehabilitation ͈Ͳ,ͬͬͬ
Automation of Gates ͈ʹͱ,ͬͬͬ
Exhaust Fan Replacement ͈ͯͬ,ͬͬͬ
Pump Selection Programming ͈ͭͬͬ,ͬͬͬ
Pressure Surge Improvements ͈ʹͭͮ,ͬͬͬ
Assets Nearing End of Useful Life ͈ͭͭʹ,ͬͬͬ
V & A Recommendations ͈ͭ,ʹͲͲ,ͬͬͬ
Total CIP Recommendations ͈ͭͭ,Ͱͯͳ,ͬͬͬ
Projects Underway
Item Cost Estimate
VFD and PLC Replacement ͈ͭ,ͬͯʹ,ͬͬͬ
Wet Well Liner Replacement and Gate Repairs ͈ͱͮͱ,ͬͬͬ
Total Projects Underway ͈ͭ,ͱͲͯ,ͬͬͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 5 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͱ-ͭ
Chapter 5

PROJECT PHASING

5.1 Introduction
This chapter provides an approach to ranking the CIP projects recommended in Chapter Ͱ and includes a detailed list of each project and its cost estimate.

5.2 CIP Project Ranking
Tables ͱ.ͭ, ͱ.ͮ, ͱ.ͯ, and ͱ.Ͱ summarize the individual CIP projects identified in Chapter Ͱ for each pump station. The tables identify the major project components and drivers and include the estimated project cost. Project numbers were assigned arbitrarily for tracking purposes.

Table ͱ.ͭ Study and Assessments CIP Summary
Project
No. Project Project Components Driver
Cost
(͈ͭ,ͬͬͬ)
ͭ SCADA
Communication
Improvements
Study
x Master planning study
x BVPS, RPS, and BCPS
x Condition
x Risk
x Operations
Improvement
͈ͳͱ
ͮ Security Features
Study
x Master planning study
x BVPS, RPS, and BCPS
x Allowance for
Improvements
x Site Improvements
x Safety
x Community
x Risk
͈ͯͱͬ
ͯ ATS and Generator
Testing
Improvements
Study
x Master planning study
x BVPS and RPS
x Testing Improvement ͈Ͳͬ
Ͱ BVPS Assessment
of Original
Forcemain over
Creek
x Assess forcemain
segment
x Identify rehabilitation
needs
x Condition ͈ͱͬ
ͱ Pressure Surge
Analysis
x Pressure surge analysis
for BCPS and RPS
x Recommend mitigation
measures for each site
x Risk ͈ͮͬ
Total Estimated Costs ͈ͱͱͱ,ͬͬͬ
To compare and evaluate projects for scheduling and budgeting needs, a ranking system was developed using a “triple bottom line” approach. Similar to criticality ratings, this approach compares the financial, environmental, and social aspects among the CIP projects to achieve the goals of EWA and this project. These three categories and their goals are described below:
x Financial: Implement cost effective projects and solutions. Maximize economic benefits for customers through cost-effective operations.
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x Environmental: Meet or exceed permit limits and minimize reportable offenses. Improve the local habitat and minimize impacts to the local and global environment. x Social: Maintain a high standard of worker safety and protection and maximize community benefits through improved aesthetics and recreational uses.

In meeting these goals, projects that rank highest in all categories can be implemented based on a weighted scale. The EWA, the City of Vista, and Carollo have discussed the weighting of each category to ensure that each aligns with EWA and the City’s goals of staff safety and consistent and reliable wastewater treatment.

Table ͱ.ͮ Buena Vista Pump Station CIP Summary
Project
No. Project Project Components Driver
Cost
(͈ͭ,ͬͬͬ)
Ͳ Building and Site
Items
x Replace flood containment
door
x Replace wet well lighting
x Demo seal water system
x Demo and replace tile roof
x Install membrane on barrel
roof
x Replace exterior floodlights
x Initial repair and application
of paint/coating
x Replace service entrance
switchgear
x Replace fence with ʹ' candy
cane-style security fence
x Meter vault crack injection
x Meter vault infiltration
remediation
x Asphalt overly
x Surge tank access platform
x Condition
x Safety
x Risk
͈ͳͱͯ
ͳ VFD and PLC
Replacement
x Replace PLC
x Replace VFD's for Pump Nos.
ͭ, ͮ, Ͱ, and ͱ
x Condition
x Risk ͈ͭ,ͭͮͮ,ͬͬͬ*
ʹ Pump Rehabilitation x Rebuild Pump Nos. Ͱ and ͱ x Condition x Risk ͈ͱͬ,ͬͬͬ
͵
Forcemain Plug
Valve Replacement
and Automation
x Replace all forcemain plug
valves (eight ͭͰ" suction and
discharge valves, three ͮͬ"
header valves, three ͮͰ"
buried valves)
x Automate three ͮͰ" buried
forcemain plug valves and ͮͬ"
plug valve of forcemain B
header
x Condition
x Risk
͈ͮͰͮ,ͬͬͬ

* Project is scheduled for completion in ͮͬͭͲ. Cost Estimate is not included in the pump station Total Estimated Cost. Cost is Total Estimated Construction Cost and does not include engineering design costs. Design cost estimates are provided separately as the design work and CIP identification were completed concurrently. 05/13/2025 C9 512 of 1078
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Table ͱ.ͮ Buena Vista Pump Station CIP Summary (Cont.) Project
No. Project Project Components Driver Cost (͈ͭ,ͬͬͬ)
ͭͬ
Grinder
Improvements -
Option ͭ
x Construct new concrete grinder
vault with aluminum hatches,
access stairs, slide gates, FRP
grating
x Dual channel grinders, each capable
of handling design flow
x Bypass pumping
x Condition
x Risk
x Operations
Improvements
Reduced Labor
͈ͮ,ͯͭͮ,ͬͬͬ
ͭͭ
Grinder
Improvements -
Option Ͳ
x Obtain shelf-spare communitor for
backup
x Condition
x Risk
x Operations
Improvements
͈ͱͭ,ͬͬͬ
ͭͮ Backflow
Preventer
x Demo hydropneumatic tank system
x Install backflow preventer
x Reduced Labor
x Condition ͈ͳͬ,ͬͬͬ
ͭͯ Vapor Phase
Odor Control
x Install two-stage biological scrubber
contained in a single tower
x Installation of
new receptor ͈ͱͰͱ,ͬͬͬ
ͭͰ Wet Well
Rehabilitation
x Surface preparation and concrete
repair in wet well
x Install new coating
x Bypass pumping
x Condition
x Risk ͈͵ͬͭ,ͬͬͬ
ͭͱ Level Monitoring
System Upgrade
x Demo existing bubbler system
x Install pressure transducer level
monitoring system
x Process
Improvements
x Risk
͈ͮ͵,ͬͬͬ
ͭͲ Exhaust Fan
Replacement
x Install wall-mounted centrifugal
exhaust fan, rated ͯͲͬͬ CFM, with
thermostat and ͭ hp fan motor in
electrical room
x Install roof-mounted centrifugal
supply fan rated ͯͲͬͬ CFM, with ͭ
hp fan motor in electrical room
x Energy
efficiency
x Improved work
environment ͈ͮ͵,ͬͬͬ
ͭͳ
Assets Nearing
End of Useful
Life
x Replace flow meters A and B
x Replace flow transmitters A and B
x Replace gas analyzer
x Replace dry-pit sewage pumps ͭ, ͮ,
Ͱ, and ͱ
x Condition
͈ͳͭ͵,ͬͬͬ
ͭʹ
V & A
Recommendatio
ns
x Replace corroded header spool
x Repair grout pads under pump
bases
x Replace corroded components in
meter vaults
x Coat meter vault equipment/piping
with material suitable for marine
environment
x Repair drain piping and ducting in
bathrooms
x Condition
͈Ͱʹ,ͬͬͬ
Total Estimated Costs ͈ͱ,ͳͰ͵,ͬͬͬ
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Table ͱ.ͯ Raceway Pump Station CIP Summary
Project
No. Project Project Components Driver
Cost
(͈ͭ,ͬͬͬ)
ͭ͵ Building and Site
Items
x Replace louvered doors with hollow
metal doors with solid panels
x Install concrete berm along south
side of compound
x Initial repair and application of
paint/coating
x Replace floodlight on roof
x Install MCC surge protection device
x Connect light fixtures to
photoelectric sensor
x Replace fence with ʹ' candy cane-
style security fence
x Condition
x Safety
x Risk
͈͵ͳ,ͬͬͬ
ͮͬ Sewage Grinder
Improvements
x Demo existing grinder and bar screen
x Install dual channel grinders with
overflow bar racks
x Divert flow to El Fuerte pump station
instead of bypass pumping
x Condition
x Risk
x Operations
Improvements
x Reduced labor
͈ͭͲͭ,ͬͬͬ*
ͮͭ PLC Replacement x Replace PLC x Condition ͈ʹʹ,ͬͬͬ*
ͮͮ
Emergency
Overflow Storage
Pond
x Replace concrete curb and handrail
around perimeter
x Replace ͭʹ" emergency overflow flap
gate
x Install epoxy/polyurethane coating to
entire surface of pond
x Condition
x Risk
x ͈ͭʹͳ,ͬͬͬ
ͮͯ Odor Control Unit x Replace odor control unit x Condition ͈ͮ͵,ͬͬͬ ͮͰ
Plug at
RPS/Carlsbad
Interconnect
x Replace existing plug with ͭͬ" full
port plug valve
x Condition
x Risk ͈ͰͰ,ͬͬͬ
ͮͱ Exhaust Fan
Replacement
x Install centrifugal exhaust fan rated
Ͳͬͬ CFM
x Install ͬ.ͱ hp fan motor
x Energy efficiency
x Improved work
environment
͈ͭͭ,ͬͬͬ
ͮͲ Pressure Surge
Improvements
x Install ͭ,ͬͬͬ gallon surge tank
x Install vacuum relief valves x Risk ͈ͱͮͭ,ͬͬͬ
ͮͳ Assets Nearing End
of Useful Life
x Replace submersible Pump Nos. ͭ, ͮ,
and ͯ with Vaughan chopper pumps x Condition ͈ͭͳͬ,ͬͬͬ
ͮʹ V & A
Recommendations
x Replace corroded conduits on
electrical box x Condition ͈ͭͬ,ͬͬͬ
Total Estimated Costs ͈ͭ,ͬͲ͵,ͬͬͬ

* Project is scheduled for completion in ͮͬͭͲ. Cost Estimate is not included in the pump station Total Estimated Cost. Cost is Total Estimated Construction Cost and does not include engineering design costs. Design cost estimates are provided separately as the design work and CIP identification were completed concurrently. 05/13/2025 C9 514 of 1078
PUMP STATION REHABILITATION STUDY | CHAPTER 5 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͱ-ͱ
Table ͱ.Ͱ Buena Creek Pump Station CIP Summary
Project
No. Project Project Components Driver
Cost
(͈ͭ,ͬͬͬ)
ͮ͵ Building and Site Items
x Install concrete berm between
compound and creek
x Install access stairs and erosion
control on slope for access to
SDG&E meter cabinet
x Crack injection to remediate an
active leak in the pump room
x Initial repair and application of
paint/coating
x Replace return pump control
panel pilot lights
x Asphalt repair and overlay
x Replace fence with ʹ' candy-
cane style security fence
x Condition
x Safety
x Risk
͈ͭ͵ͱ,ͬͬͬ
ͯͬ VFD and PLC
Replacement
x Replace PLC
x Replace VFD's for Pump Nos.
ͭ, ͮ, Ͱ, and ͱ
x Condition
x Risk ͈ͭ,ͬͯʹ,ͬͬͬ*
ͯͭ Redundant Forcemain
x Install ͮͰ" HDPE redundant
forcemain along the alignment
of the existing excess effluent
line
x Risk ͈ͳ,͵͵ͮ,ͬͬͬ
ͯͮ Valve Replacement
x Replace all forcemain plug
valves (three ʹ", seventeen ͭͮ",
three ͭͰ", one ͮͰ" plug valves),
including motor-operated
valves at pumps ͮ and ͯ
x Replace the ͭͮ" flanged check
valve at pumps ͭ, ͮ, ͯ, Ͱ, and ͱ
x Condition ͈ͮͯͯ,ͬͬͬ
ͯͭ Odor Control Unit
Rehabilitation
x Paint and patch fiberglass
housing
x Replace blower control panel
pilot lights
x Condition
͈Ͳ
ͯͮ Automation of Gates
x Install motor-operated gate
actuators to the sluice gate
that divides wet well and both
slide gates upstream of the
grinders
x Operations
Improvements
͈ʹͱ
* Project is scheduled for completion in ͮͬͭͲ. Cost Estimate is not included in the pump station Total Estimated Cost. Cost is Total Estimated Construction Cost and does not include engineering design costs. Design cost estimates are provided separately as the design work and CIP identification were completed concurrently. 05/13/2025 C9 515 of 1078
CITY OF VISTA | CHAPTER 5 | PUMP STATION REHABILITATION STUDY ͱ-Ͳ | AUGUST ͮͬͭͲ | FINAL
Table ͱ.Ͱ Buena Creek Pump Station CIP Summary (Cont.) Project
No. Project Project Components Driver
Cost
(͈ͭ,ͬͬͬ)
ͯͯ
Wet Well Liner
Replacement and
Gate Repairs
x Surface preparation and concrete
repair in wet well
x Install new coating
x Bypass pumping
x Replace stop logs
x Replace seal on sluice gate
x Replace seals on slide gates
x Condition
x Risk ͈ͱͮͱ,ͬͬͬ*
ͯͰ Odor Control Unit
Rehabilitation
x Paint and patch fiberglass housing
x Replace blower control panel pilot
lights
x Condition ͈Ͳ,ͬͬͬ
ͯͱ Automation of Gates
x Install motor-operated gate
actuators to the sluice gate that
divides wet well and both slide
gates upstream of the grinders
x Operations
Improvements ͈ʹͱ,ͬͬͬ
ͯͲ Exhaust Fan
Replacement
x Install centrifugal exhaust fan
rated ͮͮͱͬ CFM, with ͭ.ͱ hp fan
motor in pump room
x Install centrifugal roof supply fan
rated ͳͬͬͬ CFM, with ͯ hp fan
motor on roof
x Energy efficiency
x Improved work
environment
͈ͯͬ,ͬͬͬ
ͯͳ Pump Selection
Programming
x Programming to allow to select
pump sequence in any order
x Operations
Improvements ͈ͭͬͬ,ͬͬͬ
ͯʹ Pressure Surge
Improvements
x Install ͭ,ͬͬͬ gallon surge tank
x Install vacuum relief valves x Risk ͈ʹͭͮ,ͬͬͬ
ͯ͵ Assets Nearing End of
Useful Life
x Replace ʹ" Shadowridge flow
meter
x Replace ͭͰ" Encina flow meter
x Replace gas analyzer
x Rehabilitate sewage pumps ͭ, ͮ, ͯ,
Ͱ, and ͱ
x Condition ͈ͭͭʹ,ͬͬͬ
Ͱͬ V & A Projects x Cathodic Protection x Risk ͈ͭ,ʹͲͲ,ͬͬͬ Total Estimated Costs ͈ͭͭ,Ͱͯͳ,ͬͬͬ

* Project is scheduled for completion in ͮͬͭͲ. Cost Estimate is not included in the pump station Total Estimated Cost. Cost is Total Estimated Construction Cost and does not include engineering design costs. Design cost estimates are provided separately as the design work and CIP identification were completed concurrently. 05/13/2025 C9 516 of 1078
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The “triple bottom line” approach was reviewed and discussed with the City. The City then gave feedback on the importance of each project for each category. Table ͱ.ͱ presents the weighting used for the prioritization of each category.

Table ͱ.ͱ Weighting of Categories for Prioritization of CIP Category Weight
Financial ͯͬ%
Environmental Ͱͬ%
Social ͯͬ%
Total ͭͬͬά
Table ͱ.Ͳ provides the results of the assessment for all pump stations. Appendix A contains detailed comparison sheets. The Total Prioritized Project Costs does not include projects identified later in the study.

Table ͱ.Ͳ Prioritized Project List
Potential Project
Pump
Station
Ranking Category and Weight
Project Cost
Social Environmental Financial Total
Rankͯͬ% Ͱͬ% ͯͬ%
Grinder Replacement BVPS ͯ.͵ Ͱ.ʹ ͯ.͵ ͭͮ.Ͳ ͈ͮ,ͯͭͮ,ͬͬͬ
Grinder Improvements RPS ͯ.ͬͰ .ͬͯ .ͬͭ ͬ .͈ͬ ͭ Ͳ ͭ ,ͬͬͬ
VFD/PLC Replacement BCPS ͭ.ʹ Ͱ.Ͱ ͯ.ͬ ͵.ͮ ͈ͭ,ͬͯʹ,ͬͬͬ
Redundant FM BCPS ͬ.͵Ͱ .Ͱͯ .ͬʹ .͈ͯ ͳ ,͵͵ͮ,ͬͬͬ
Valve Replacement BVPS ͮ.Ͱ ͯ.ͮ ͮ.ͳ ʹ.ͯ ͈ͮͰͮ,ͬͬͬ
Building Items and Site
Work BVPS ͬ.Ͳͯ .Ͳͯ .͵ʹ .ͭ ͈Ͳ͵ͯ ,ͬͬͬ
FM Plug Valve
Replacement &
Automation
BCPS ͮ.Ͱ ͮ.ʹ ͮ.ͳ ͳ.͵ ͈ͮͯͯ,ͬͬͬ
Vapor Phase Odor Control BVPS ͯ.ͯͮ .ʹͭ .ͱͳ .Ͳ͈ ͱ Ͱ ͱ ,ͬͬͬ Building and Site
Improvements BCPS ͮ.ͳ ͯ.Ͳ ͭ.ͮ ͳ.ͱ ͈ʹͬ,ͬͬͬ
Building and Site
Improvements RPS ͮ.ͳͯ .Ͳͭ .ͮͳ .ͱ͈ ͯ Ͳ ,ͬͬͬ
Rehab Pump Nos. Ͱ & ͱ BVPS ͭ.ͮ ͯ.ͮ ͯ.ͬ ͳ.Ͱ ͈ͱͬ,ͬͬͬ
Assets Nearing End of
Useful Life BVPS ͭ.ͱͰ .ͬͭ .ʹͳ .͈ͯ ͳ ͭ ͵ ,ͬͬͬ
PLC Replacement RPS ͭ.ʹ ͮ.ʹ ͮ.ͳ ͳ.ͯ ͈ʹʹ,ͬͬͬ
VFD/PLC Replacement BVPS ͭ.ͱͮ .Ͱͯ .ͬͲ .ʹ͈ ͭ ,ͭͮͮ,ͬͬͬ
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Table ͱ.Ͳ Prioritized Project List (Cont.)
Potential Project
Pump
Station
Ranking Category and Weight
Project Cost
Social Environmental Financial Total
Rankͯͬ% Ͱͬ% ͯͬ%
Asphalt, Overlay BVPS ͯ.ͬ ͮ.ͬ ͭ.ʹ Ͳ.ʹ ͈Ͳͬ,ͬͬͬ
Wet Well Liner
Replacement and Gate
Repairs
BCPS ͬ.ͯͯ .ͱͮ .ͳͲ .Ͳ͈ ͱ ͮ ͱ ,ͬͬͬ
Wet Well Rehabilitation BVPS ͭ.ͱ ͯ.Ͳ ͭ.ͮ Ͳ.ͯ ͈͵ͬͭ,ͬͬͬ
Level Monitor Upgrades BVPS ͮ.ͭͮ .Ͱͭ .ʹͲ .͈ͯ ͮ ͵ ,ͬͬͬ
Overflow Storage Pond RPS ͭ.ͮ ͮ.ʹ ͮ.ͭ Ͳ.ͭ ͈ͭʹͳ,ͬͬͬ
Replace Floating Plug at
RPS/Carlsbad
Interconnect
RPS ͬ.Ͳͮ .ʹͮ .ͳͲ .͈ͭ Ͱ Ͱ ,ͬͬͬ
Backflow Preventer BVPS ͬ.͵ ͮ.Ͱ ͮ.ͭ ͱ.Ͱ ͈ͳͬ,ͬͬͬ
Fence BCPS ͮ.ͭͭ .Ͳͭ .ͱͱ .͈ͮ Ͳ Ͳ ,ͬͬͬ
Assets Nearing End of
Useful Life BCPS ͬ.Ͳ ͮ.Ͱ ͭ.ʹ Ͱ.ʹ ͈ͭͭʹ,ͬͬͬ
Odor Control Unit RPS ͬ.͵ͮ .Ͱͬ .Ͳͯ .͵͈ ͮ ͵ ,ͬͬͬ
Fence RPS ͮ.ͭ ͬ.Ͱ ͭ.ͮ ͯ.ͳ ͈Ͳͭ,ͬͬͬ
Assets Nearing End of
Useful Life RPS ͬ.ͬͮ .ͬͭ .ͱͯ .ͱ͈ ͭ ͳ ͬ ,ͬͬͬ
V&A Recommendations BCPS ͬ.Ͳ ͭ.Ͳ ͬ.͵ ͯ.ͭ ͈ͭ,ʹͲͲ,ͬͬͬ
Automation of Gates BCPS ͭ.ͱͭ .ͮͬ .ͯͯ .͈ͬ ʹ ͱ ,ͬͬͬ
Exhaust Fan Replacement BCPS ͯ.ͬ ͬ.ͬ ͬ.ͬ ͯ.ͬ ͈ͯͬ,ͬͬͬ
Asphalt, Overlay BCPS ͭ.ͮͬ .ʹͬ .͵ͮ .͵ ͈Ͱ͵ ,ͬͬͬ
Odor Control Unit Repair BCPS ͬ.͵ ͬ.ʹ ͬ.͵ ͮ.Ͳ ͈Ͳ,ͬͬͬ
V&A Recommendations RPS ͬ.ͯͭ .Ͳͬ .Ͳͮ .ͱ͈ ͭ ͬ ,ͬͬͬ
Exhaust Fan Replacement RPS ͮ.Ͱ ͬ.ͬ ͬ.ͬ ͮ.Ͱ ͈ͭͭ,ͬͬͬ
Exhaust Fan Replacement BVPS ͭ.ʹͬ .ͬͬ .ͬͭ .ʹ͈ ͮ ͵ ,ͬͬͬ
Total Prioritized Project Costs ͈ͭ͵,Ͳͱͳ,ͬͬͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 5 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͱ-͵

5.3 CIP Consolidated Projects
The individual CIP projects were prioritized according to the criteria previously described. In a workshop with the City to discuss CIP projects and the best ways to organize them, a decision was made to consolidate projects with similar scopes by grouping them into four large projects.

The three largest projects make up their own CIP, and the smaller non-critical items are consolidated into one CIP. Projects scheduled for completion in ͮͬͭͲ during the current project, as well as recommended studies and assessments, are grouped separately.

The resulting four CIP projects are:
x Buena Vista Grinder Replacement.
x Buena Creek Redundant Forcemain.
x Buena Vista Vapor Phase Odor Control.
x Consolidated Rehabilitation Items (includes all remaining items).

Table ͱ.ͳ provides the list of consolidated projects, including their costs.

Table ͱ.ͳ Consolidated Projects
Project ID Project Pump
Station
Highest Rank of
included Projects Project Cost
ͭ
Current Project:

VFD/PLC Replacement;
Grinder Improvements
(RPS); Wet Well Rehab
All sites ͭͬ ͈ͮ,͵ͯͰ,ͬͬͬ
ͮ Grinder Replacement
BVPS
ͭͭ.Ͳ͈ ͮ ,ͯͭͮ,ͬͬͬ
ͯ Consolidated
Rehabilitation Items All sites ʹ.ͯ ͈ͳ,ͰͬͲ,ͬͬͬ
Ͱ Redundant Forcemain BCPS ʹ.͈ͯ ͳ ,͵͵ͮ,ͬͬͬ
ͱ Vapor Phase Odor
Control BVPS Ͳ.ͱ ͈ͱͰͱ,ͬͬͬ
Ͳ Studies and
Assessments All sites - ͈ͱͱͱ,ͬͬͬ
Total Estimated Costs ͈ͮͭ,ͳͰͰ,ͬͬͬ

5.4 Implementation Schedule
The results of the "triple bottom line" approach and discussions with the City also led to a decision incorporate these projects into the Asset Management Plan currently underway, as well as the agreement between the City and EWA regarding items that can be addressed as Operations and Maintenance tasks. Projects should be scheduled to minimize site disruption. 05/13/2025 C9 519 of 1078
CITY OF VISTA | CHAPTER 5 | PUMP STATION REHABILITATION STUDY ͱ-ͭͬ | AUGUST ͮͬͭͲ | FINAL

5.5 Business Case Evaluation
Business case evaluations are provided in subsequent sections for the CIP projects identified above.

5.5.1 Grinder Replacement at Buena Vista Pump Station

5.5.1.1 Background
The JWC grinder provides minimal protection for downstream equipment and needs to be cleaned manually. To maintain efficient pump station operations, improvements are needed.

5.5.1.2 Project Need and Drivers
This project is driven by the need to effectively convey raw sewage, including debris and solids, through the Buena Vista Pump Station without clogging the pumps or damaging equipment. The current configuration, Figure ͱ.ͭ, is inadequate to meet the pump station's current needs, lacks redundancy, and provides no means of control through SCADA at EWA.

Improvements to the grinding and screening process at BVPS will reduce maintenance needs and staff exposure to hazards currently present from screenings removal, wet well entry, and the lifting associated with cleaning the bar screen. Improvements will also provide additional protection from pump clogging and equipment damage from debris.

5.5.1.3 Recommendations
Installing a new concrete vault to house redundant channel grinders is recommended as the most efficient way to improve the pump station's sewage grinding capability. A new concrete vault will be constructed between the influent manhole to the east of the pump station and the wet well.

The distance from the manhole and the building is approximately ͮͯ.ͱ feet, which the proposed channel would occupy approximately ͭʹ feet of. A width of approximately ͭͲ feet is required to accommodate the two grinders, separated by a bulkhead wall and access stairs from grade to the working surface.

Influent would enter the grinder channel from the ͯͬ-inch influent pipeline downstream of the manhole and would be diverted by the bulkhead wall into two channels. Each channel would house a channel grinder with a capacity of at least ͮͯ.ͭ mgd, meeting the design criteria and providing full redundancy.

A DM-TͯͲ Dimminutor by Franklin Miller is recommended for the channel grinder. This is an open channel comminutor that uses multiple stainless bi-directional rotary cutters to reduce debris to fine particulate. The DM-TͯͲ can handle a maximum flow of ͮͰ.ͯ mgd and a minimum of ͮ.ʹ mgd. It is designed for high flow and low headloss under full or occasional submergence.

The exact dimensions of the vault and channels will be designed to accommodate the Ͱͳ-inch wide dimminutors.

Figure ͱ.ͭ Communitor and
Barscreen
05/13/2025 C9 520 of 1078
PUMP STATION REHABILITATION STUDY | CHAPTER 5 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͱ-ͭͭ
Channel frames secure the grinders and facilitate removal for service. Stainless steel slide gates with handwheel operators will be installed both upstream and downstream of the grinders so flow can be isolated for maintenance as needed.

The new concrete vault will be approximately ͭͰ feet below grade to align with the invert elevation of the pipe. The open channels in the vault will be covered by FRP grating level with the top of the channels and bulkhead wall to provide a safe working surface for staff. The vault will be accessed through an aluminum hatch that opens to an aluminum landing and flight of stairs.

To access the grinders for removal, additional hatches are located in the asphalt.

Installing the concrete vault and grinders requires complete bypass of the pump station for the duration of the work. Work is estimated to take two months.

If the concrete vault and grinder installation is not

5.5.1.4 Alternatives
When looking into replacing the current configuration, the project team investigated whether the existing grinder channel could be repurposed and whether single or dual grinders could meet the pump station design flow. The first three options require a new concrete vault to be constructed between the existing manhole and the influent entrance to the wet well.

The alternatives and the primary reason for rejecting each are listed below. x Option 1 - Concrete vault housing redundant channel grinders able to handle design capacity. This project is recommended.
x Option 2 - Concrete vault housing dual channel grinders, each able to handle one half of design capacity, with a spare on the shelf: This option does not allow individual channels to be isolated for maintenance at design capacity and presents increased risk associated with removing and replacing a single grinder.
x Option 3 - Install a single channel grinder, with a spare on the shelf for redundancy, in where the existing grinder is located. This option requires significant modification to the wet well to accommodate a grinder that meets design capacity. x Option 4 - Install dual inline grinders on the influent pipeline, with a spare on the shelf for redundancy. Each grinder should be able to handle one half of design capacity. This option would require the inline grinders to be installed vertically to meet the minimum flow velocity needed to push solids through the screen, making it impractical on the gravity-fed pipeline.
x Option 5 - Install chopper pumps to provide redundancy to the system. This option does not allow the elimination of the existing barscreen and grinder as chopper pumps are not intended for large debris.
x Option 6 - Obtain a shelf-spare communitor of the same model as the existing unit. This option provides redundancy by providing a backup unit in case the existing communitor is removed for service or maintenance. This option is recommended as an interim measure to ensure continued performance of the pump station until Option ͭ is implemented.

5.5.1.5 Justification
Installing a grinder vault with dual sewage grinders would protect critical assets downstream by removing debris from the influent that can clog pumps or physically damage equipment. It 05/13/2025 C9 521 of 1078
CITY OF VISTA | CHAPTER 5 | PUMP STATION REHABILITATION STUDY ͱ-ͭͮ | AUGUST ͮͬͭͲ | FINAL
would also provide the redundancy, which the current configuration lacks. A proactive approach to improving the grinding and screening at Buena Vista ensures the longevity of critical assets.

5.5.1.6 Project Cost
The project cost for Option ͭ is estimated at ͈ͮ,ͯͭͮ,ͬͬͬ.

5.5.2 Consolidated Rehabilitation Items

5.5.2.1 Background
The BVPS, RPS, and BCPS are critical facilities for conveying sewage from the City to the EWPCF for treatment. Maintaining and rehabilitating these facilities enables them to perform properly throughout their useful lives by preventing major equipment failure, loss of conveyance, and long-term difficulty in reestablishing operations.

5.5.2.2 Project Need and Drivers
The project needs and drivers for the Consolidated Rehabilitation Items include increasing operational flexibility, addressing safety and risk issues, reducing labor associated through maintenance, and restoring the pump stations to like-new condition by replacing or rehabilitating aging and damaged assets.

Table ͱ.ʹ lists the recommended projects, grouped by pump station.

Table ͱ.ʹ Consolidated Project Components
Pump Station Project Component Cost Estimate Total Cost Estimate Buena Vista
Building Items and Site Work ͈ͳͱͯ,ͬͬͬ
͈ͮ,ʹ͵ͮ,ͬͬͬ
Rehab Pump Nos.Ͱ & ͱ͈ ͱ ͬ ,ͬͬͬ
Forcemain Plug Valve Replacement ͈ͮͰͮ,ͬͬͬ
Grinder Improvements - Option Ͳ͈ ͱ ͭ ,ͬͬͬ
Backflow Preventer ͈ͳͬ,ͬͬͬ
Wet Well Rehabilitation ͈͵ͬͭ,ͬͬͬ
Level Monitor Upgrades ͈ͮ͵,ͬͬͬ
Fan Replacement ͈ͮ͵,ͬͬͬ
Assets Near End of Useful Life ͈ͳͭ͵,ͬͬͬ
V&A Recommendations ͈Ͱʹ,ͬͬͬ
Raceway
Building and Site Work ͈͵ͳ,ͬͬͬ
͈ͭ,ͬͲ͵,ͬͬͬ
Overflow Storage Pond ͈ͭʹͳ,ͬͬͬ
Odor Control Unit ͈ͮ͵,ͬͬͬ
Replace Floating Plug at
RPS/Carlsbad Interconnect ͈ͰͰ,ͬͬͬ
Exhaust Fan Replacement ͈ͭͭ,ͬͬͬ
Pressure Surge Improvements ͈ͱͮͭ,ͬͬͬ
Assets Nearing End of Useful Life ͈ͭͳͬ,ͬͬͬ
V&A Recommendations ͈ͭͬ,ͬͬͬ
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PUMP STATION REHABILITATION STUDY | CHAPTER 5 | CITY OF VISTA FINAL | AUGUST ͮͬͭͲ | ͱ-ͭͯ
Table ͱ.ʹ Consolidated Project Components (Cont.)
Pump
Station Project Component Cost Estimate Total Cost Estimate Buena Creek
Building Items and Site Work ͈ͭ͵ͱ,ͬͬͬ
͈ͯ,ͰͰͱ,ͬͬͬ
Valve Replacement ͈ͮͯͯ,ͬͬͬ
Odor Control Unit Repair ͈Ͳ,ͬͬͬ
Automation of Gates ͈ʹͱ,ͬͬͬ
Exhaust Fan Replacement ͈ͯͬ,ͬͬͬ
Pump Selection Programming ͈ͭͬͬ,ͬͬͬ
Pressure Surge Improvements ͈ʹͭͮ,ͬͬͬ
Assets Nearing End of Useful Life ͈ͭͭʹ,ͬͬͬ
V & A Recommendations ͈ͭ,ʹͲͲ,ͬͬͬ
Total Consolidated Rehabilitation Items Cost Estimate ͈ͳ,ͰͬͲ,ͬͬͬ

5.5.2.3 Alternatives
No alternatives were evaluated for the purpose of this report.

5.5.2.4 Justification
These consolidated projects are justified because addressing the issues can prevent the need for larger projects or asset replacement from failures that will affect pump station operations. A proactive approach to asset maintenance and rehabilitation will decrease asset deterioration and maintenance costs while increasing asset longevity.

5.5.2.5 Project Cost
The project cost is estimated at ͈ͳ,ͰͬͲ,ͬͬͬ.

5.5.3 Redundant Forcemain at Buena Creek Pump Station

5.5.3.1 Background
The BCPS effluent is carried to the BSD Encina forcemain by a single forcemain composed primarily of ͭʹ-inch diameter PVC pipe. At approximately ͳ,ͱͬͬ feet downstream of the pump station, the forcemain connects to the BSD ͮͰ-inch diameter PVC forcemain, which continues for about ʹ,Ͱͬͬ feet to the gravity outfall near El Camino Real. Effluent is conveyed form the outfall to the EWPCF for treatment.

5.5.3.2 Project Need and Drivers
The forcemain is a critical asset and lacks redundancy, with no suitable backup to handle flows during failure. Since the forcemain must remain inactive, the ability to assess and maintain the pipeline is limited.

Adding a redundant forcemain would allow the interior of the forcemain to be visually assessed by CCTV or other means to identify issues before pipeline failure occurs. The redundant forcemain also improves flexibility for maintenance activities and provides a ways to handle increased flows that may occur.
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5.5.3.3 Recommendations
Alternative ͱ follows the alignment of the existing excess effluent line, which was deemed not suitable for repurposing as a redundant forcemain because it does not meet the pump station's hydraulic requirement. The alignment consists of approximately ͭͲ,ͮͬͬ feet of ͮͰ inch diameter HDPE. The smaller diameter pipe and the second shortest reach of evaluated alignments contribute to lower material and construction costs.

This alternative requires the least amount of traffic control, since about half of the reach is in green space, avoiding high volume roads as much as possible and minimizing community disruption. Although the existing excess effluent line would need to be demolished to make room for a new pipeline, space is available for it. This space minimizes utility conflicts, and no new easements are required.

According to the non-cost evaluation performed, this alternative is the highest ranked due to low community disruption and construction impact and minimized utility conflicts. If the City determines that utility conflicts are minimal and traffic control along Faraday is preferable to working in canyons and green spaces, Alternative ͮ would be the second route recommended.

5.5.3.4 Alternatives
Six potential alignments were evaluated, including repurposing the existing excess effluent line.

The alternatives and the reasoning behind their rankings are described below. x Existing Excess Effluent Pipeline: The existing excess effluent line does not meet hydraulic criteria. Modifications to the dry well and replacement of asbestos concrete pipe are required to make this option feasible.
x Alternative 1 - South Melrose/Faraday/Orion Route: This alternative follows a high volume road and would require traffic control along the majority of the alignment.

Utility conflicts and encroachment permitting is expected. x Alternative 2 - South Melrose/Faraday/Canyon Route: This alternative ranks second and might be considered if the City's desire to avoid canyons and green spaces supersedes other criteria. This alignment represents the shortest of the routes considered.

Community disruption was the main factor in the lower ranking. x Alternative 3 - South Melrose/Palomar Airport Road Route: This alternative follows a high volume road and would require traffic control along the majority of the alignment.

Utility conflicts are expected.
x Alternative 4 - South Melrose/Faraday/El Fuerte/Palomar Airport Road Route: This alternative ranked lowest in all but one category. This alignment is the longest of the alternatives investigated, requires the larger pipe diameter, utility conflicts and encroachment permitting is expected, and it is located in a high volume road, necessitating traffic control along the majority of the alignment. x Alternative 5 - Excess Effluent Alignment Route: This alternative is the highest ranking, primarily due to the shortest length and smaller diameter pipe, avoidance of utility conflicts and high volume roads, and lack of major permitting expected. 05/13/2025 C9 524 of 1078
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5.5.3.5 Justification
Fines incurred from a spill can range from ͈ͭ to ͈ͭͬ per gallon. The average flow from BCPS is approximately ͭ,Ͱͯͬ gpm. The fees associated with an uncontained spill could range from ͈ͮ million to more than ͈ͮͬ million dollars per day. At the lowest fine level, four days' worth of fines would cover the estimated cost of the new forcemain.

5.5.3.6 Project Cost
The project cost is estimated at ͈ͳ,͵͵ͮ,ͬͬͬ.

5.5.4 Vapor Phase Odor Control at Buena Vista Pump Station

5.5.4.1 Background
Odor control is planned for the forcemain leaving the pump station, but the BVPS has no odor control measures in place. The wet well exhausts to the atmosphere through a stack, with no vapor or liquid odor control provided before release.

5.5.4.2 Project Need and Drivers
No odor receptors are close enough to the pump station to warrant odor control. In addition, developers are planning to construct a resort hotel adjacent to the pump station on the east side.

Thus, this project will be driven by the need to install new receptors near the pump station.

5.5.4.3 Recommendations
For the recommended vapor phase odor control project, a two-stage biological scrubber system will be installed, including a single bioscrubber vessel, an exhaust fan, control panels for the electrical components and water recirculation system, and nutrient supply.

5.5.4.4 Alternatives
A two-stage biological and carbon scrubber alternative was evaluated. The system includes two scrubber vessels, one bioscrubber vessel housing biological media that bacteria can grow on, and one carbon adsorber vessel that houses carbon media. The biological stage requires a nutrient supply and pump to feed the bacteria. Additional components include electrical and water control panels, a recirculation pump, and an exhaust fan.

5.5.4.5 Justification
This project will keep nuisance odors from disturbing clientele and staff if the resort is constructed, reducing complaints.

5.5.4.6 Project Cost
The project cost is estimated at ͈ͱͰͱ,ͬͬͬ.
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Appendix A

CIP PRIORITIZATION COMPARISON TABLES
05/13/2025 C9 527 of 1078
05/13/2025 C9 528 of 1078
Client: City of Vista
Project:

Description:

Weight 30% 40% 30%
Potential Project/ Process
Area Social Environmental Financial Total Cost
Grinder Replacement 3.9 4.8 3.9 12.6 $2,312,000
VFD/PLD Replacement 1.8 4.4 3 9.2 $605,000
Building Items and Site Work 0.6 3.6 3.9 8.1 $505,000
FM Plug Valve Replacement &
Automation

2.4 2.8 2.7 7.9 $242,000
Vapor Phase Odor Control 3.3 2.8 1.5 7.6 $545,000
Rehab Pump 4 & 5 1.2 3.2 3 7.4 $50,000
Assets nearing end of Useful Life 1.5 4 1.8 7.3 $719,000 Asphalt, Overlay 3 2 1.8 6.8 $60,000
Surge Tank Platform 4.2 0.8 1.5 6.5 $118,000
Wet Well Rehabilitation 1.5 3.6 1.2 6.3 $638,000
Level Monitor Upgrades 2.1 2.4 1.8 6.3 $29,000
Fence 2.7 1.2 2.4 6.3 $70,000
Backflow Preventer 0.9 2.4 2.1 5.4 $70,000
V&A Recommendations 0.6 1.6 0.9 3.1 $48,000
Fan Replacement 1.8 0 0 1.8 $29,000
TOTAL $6,040,000
Pump Station Rehabilitation
Buena Vista Pump Station
05/13/2025 C9 529 of 1078
Client: City of Vista
Project: Pump Station Rehabilitation
Description: Buena Vista Pump Station
SOCIAL
Potential Project/
Process Area
Vapor Phase
Odor Control Fence Rehab
Pump 5
Asphalt,
Overlay
Building
Items and
Site Work
Surge Tank
Platform
Backflow
Preventer
FM Plug Valve
Replacement
Grinder
Replacement
Wet Well
Rehabilitation
Assets near
end of
Useful Life
Level
Monitor
Upgrades
V&A
Recommendat
ions