ATTACHMENT - I - SoW -REVISED-Base and Option ADD -Existing Irrigation System.pdf

Statement of Work

Design/Build Project to Repair Existing Irrigation System

Southeastern Fruit and Tree Nut Research Laboratory 21 Dunbar Rd., Byron, GA 31008

Prepared by:

Everett Wilson

28AUG23

Background:

The purpose of this project is to repair by complete replacement of the existing irrigation system and associated electrical system including the drilling of a third water well in a location specified by the Lab. This is a design/build project. All pecan and peach orchards will be connected by a new 2” manifold system installed at the side of the orchard and connected into the new 3” water main system. A new and upgraded electrical system shall be run to each manifold to power the timer system that is part of the manifold.

Statement of Work:

Contractor shall furnish all labor, materials, and supplies to perform the following work for USDA, ARS, SEFTNRL, 21 Dunbar Road, Byron, Georgia 31008.

Base Bid for Main Project in FY23:

Contractor shall install all piping, wiring, valves, equipment, etc. necessary to provide a fully working irrigation system at Byron. This will also include running of new PVC line to a location that has been identified for a new third well and installing a valve & cap at that location in order for the new well to be hooked into the new irrigation system when it’s drilled upon exercise of the add-option part of this statement of work in FY24.

To ensure limited interruption of lab research, the design and installation of the new system will be done in such a way as to minimize interruption of irrigation in the orchards and therefor will be coordinated with the Lab and a detailed schedule for implementation of the project will be developed and approved prior to start of construction. The completion of the project will include, but is not limited to, the following details as well as final submittal of accurate drawings of the new system showing all routes, valves, switches, manifold layout, and other details such as state permits, and parts list, as well as the topographic site survey conducted by the registered survey engineer and any operating manuals for the electrical equipment installation.

A comprehensive site topographic survey shall be performed by a registered survey engineer and the new system will be designed and approved by the Lab and EPM prior to acceptance for construction. The existing water piping shall be abandoned in place as it’s composed of Transite pipe, and the existing electrical system shall be demolished and disposed of whenever encountered. New trenching is required for the new water/electrical system in all instances whether 10” main irrigation loop line, 3” lines off main loop, or 2” manifold lines and associated manifold electrical lines. The new electrical system can be installed in the trench for the water lines if electrical code allows. The existing two wells and water tower are in good shape and will not require any attention in this project other than tying the two existing wells and the water tower into the newly laid 10” irrigation system. There shall be designed and installed manifolds on the primary 10” line to 3” trunk line to 2” manifolds PVC irrigation system that will enable any one well to provide irrigation water to the entire orchard complex should one or two of the existing well be out of order. The newly installed system will include an estimated 36000 feet of 3” irrigation PVC pipe and valves for the main feeder line. Each orchard shall have a 3” feeder line off the 10” main line into the orchards and the manifolds for each orchard shall be built using 2” irrigation grade PVC pipe, 2 isolation valves, one sand filter, irrigation timer system (one 24-hour timer and one 14-day timer in series), comprised within an estimated total length of 4000 feet for the orchard feeds. There shall be installed a manifold system by the farm buildings that will allow for the isolation of the pesticide building and the requirements/location of this manifold system will be detailed by the Lab during the site visit. A standard 2” sand filter shall be installed in the 2” PVC manifold system to enable easy cleaning.

System Integration

Supervisory control and data acquisition (SCADA) upgrades for Wells 1, 2 (& for New Well 3 when funded per Add-Option 1).

SCADA is a control system architecture comprising computers, networked data communications and graphical user interfaces for high-level supervision of machines and processes.

Contractor will upgrade the existing Wells (1 & 2) SCADA and add the new Well (#3) to it. This upgraded SCADA will provide two modes of operation.

1. Tank Level: This will utilize the existing two wells and the future Well #3 operating in a rotating order. Tank level start and stop, functioning in a lead lag format, all will be settable at the new main SCADA touchscreen.

2. System Pressure: This will utilize the VFD at new Well #3 when it’s funded and drilled as part of the Add-On Option and two new pressure sensors to maintain a user selectable pressure throughout the system. Wells 1 & 2 & 3 will supply the tower and irrigation plots as needed. Until Well #3 is drilled, the two new pressure sensors will be used to maintain a user selectable pressure throughout the system utilizing the tower and Wells 1 & 2.

The equipment shall consist of the following.

New communication towers and SCADA cabinets will be placed at the new well and well one.

Contractor to install new 60’ towers at Well #1 pump house and at the location of the planned new Well #3. At Well #3, a 4’ x 4’ concrete pad with the Unistrut racks shall be poured to the specifications of the tower manufacturer. The pad will secure the 60’ tower and shall be positioned for the cabinet doors to face north.

At Well #1 at the water tower where the new line is run, contractor will install a tap on the main water line for ½ inch PVC sch 80 or larger up to 1 inch. This line will run to the well house and will come up the wall near the other water line, drill a hole in the wall and take line inside of well house to control panel.

At the planned location of Well #3 approximately 20 to 30 feet from future wellhead down the main water line running by this location, the Contractor will install a tap on the side for ½ PVC sch 80 or larger up to 1 inch and will run to the control panel near the pump panel. A 4’ x 4’ concrete pad shall be poured to the specifications of the tower manufacturer with the Unistrut racks for the installation of the 60’ tower and shall be positioned for the control cabinet doors to face north. Install a control cabinet with 1 ea. 120 vac 20-amp UL489 circuit breaker. Main grounds will be 2/0 bare copper and all connections except inside cabinet and top of towers will be cad welded. All ground rods will be 10-foot copper.

All measurements as to lengths of lines, equipment, etc. are estimations only and are not to be considered the absolute amount of required to successfully complete the project.

Additional clarifications to SoW from original questions are included as an Appendix.

Add-Option subject to additional funding in FY24:

Construct a new Well #3 in a currently identified location including, but not necessarily limited to, the actual well drilling/completion, pump, motor, power supply from local utility and hook the well up to the newly installed irrigation system. A well construction diagram, parts list, detailed proposal, implementation plan and detailed cost breakdown is required prior to award of the Add-Option in

FY24. The power supply to the third well is expected to come from the nearest economical point on the commercial transmission line along the adjacent road or from the existing transformer on the ARS lab that supplies the existing two wells, whichever is more economical from a project cost standpoint.

The contractor shall obtain all relevant permits for the drilling of the new third well up to a depth expected not to exceed 700 feet. The well will be constructed according to established standards with 12” casing, a 150 HP motor powering the pump to provide a minimum of 1000 gpm into the existing system through the construction of a third irrigation loop.

Additional clarifications to SoW from original questions are included as an Appendix.

All work shall be completed in accordance with all local, state, and federal codes and regulations. All work shall also meet the requirements of the ARS Facilities and Design Standards (P&P 242.1). The P&P 242.1 document can be found at: http://www.afm.ars.usda.gov/ppweb/PDF/242-01M.pdf.

All work shall be accomplished in a professional manner and in accordance with good workmanship and acceptable practice.

Contractor is responsible for inspecting the site and for determining the exact requirements of the project.

Contractor’s working hours shall be scheduled to coincide with the normal working hours (7am-4pm) at the site. Should it be necessary to schedule working hours other than normal working hours, contractor shall arrange for access to the work area with the Contracting Officer’s Representative (COR) at the site at least three days prior to the need.

Site Visit:

Bidders are encouraged to visit the site and be escorted by a government representative to confirm locations, dimensions, and conditions of the project before a bid is submitted. The site visit shall be for observing firsthand any conditions relevant to the completion of this project. No consideration will be given to claims based on lack of knowledge of existing conditions, except where contract documents make definite provisions for adjustment in cost or extension due to existing conditions not readily foreseeable.

Contractor must be registered in System for Award Management, (SAM), prior to submitting a bid.

Registration can be obtained through: https://www.sam.gov/portal/public/SAM/

Safety: The contractor is responsible for complying with all local, state and federal safety codes and laws.

Detailed Bid:

This is a design build project. The proposal will have the cost for all aspects of this project broken down in detail with a cost provided for each item. One-line bids or bids without complete detail of all associated project requirements are not acceptable for consideration. Provide all materials, labor, and equipment to fully and successfully complete the Statement of Work described in this document. The detailed bid shall http://www.afm.ars.usda.gov/ppweb/PDF/242-01M.pdf http://www.sam.gov/portal/public/SAM/ be presented in a MS Excel spreadsheet that is fully functional with formulas intact for ARS analysis of the bid. The proposal shall be submitted in MS Word. Neither type of documents will be password projected. Contractor has option of additionally submitting their proposal in .pdf format for fidelity purposes should they desire to do so but any Bid Proposal will not be accepted for review until it’s presented in MS Excel and MS Word format.

Contractor Responsibility:

The project has a base bid to be performed per the following specifications:

1. Contractor will verify all equipment, dimensions and existing site conditions covered in their report.

2. Contractor is required to manage the project and consult with the Government prior to beginning all work phases. And, to work in a manner that minimizes the impact of the work on Government operations, research, and functions.

3. All work must be performed in such a manner as to not adversely affect daily operations of the facility, its workers, and the onsite facility operations.

Material / Submittals:

The Contractor shall submit a draft of their design for review and comment to the Lab personnel, the EPM and the Contracting officer for a period of 10 business days. Upon review, incorporation of ARS comments, and approval by ARS personnel, the final version of the design shall be used for construction purposes.

Drawings shall include data and details for construction of the irrigation system as well as information regarding the name, quantity, type, and construction of materials (such as hardware, valves, sand traps/filters, gauges, etc.), that will be used to complete the project.

Installation Procedure:

Contractor will verify all dimensions and site conditions prior to beginning work. Contractor will schedule the work between working hours as listed below. Contractor is required to provide labor, specified material, equipment, and other tools required to perform the job fully and completely. No Government equipment will be available for use by the contractor. The contractor shall be responsible for protecting his work at all times and ensuring the safety of his crew and ARS employees. Upon completion of the project, the contractor shall remove from the premises all accumulated materials and rubbish caused by the project. Premises shall be left in a clean, orderly, and acceptable condition.

Project Schedule:

The completion of this project shall not exceed 365 days from date of notice to proceed. A request for time extension must be submitted to the Contracting Specialist in writing. Each request must include specific and detailed reasons in support of the schedule alteration.

Work Hours:

Contractor work hours shall be Monday through Friday, seven (7) A.M. to four (4) P.M. except for Government holidays or as otherwise arranged with the site personnel in advance.

Drawings:

Map of Existing Lines

Estimate of Length of Lines for New System

Third Well Approximate Placement

New Water/Electrical Line and Manifold Layout Approximate Locations

2 “General Manifold Drawing

Grounding Layout

Appendix:

1. The design will encompass the entire new irrigation system including lines from the water tower and the two existing wells to all points on the Lab allowing either the tower, the two existing wells (or the third well when constructed as the Add-On Option) to supply all plots individually.

2. All main water lines will be 10 inch.

3. All feeder lines less than 50 feet will remain 2 inch. Over 50 feet will be 3 inch until turn up to

AGL at new manifold installation then 2 inch after the turn. The terminal type at the end of the manifold system varies however this project ends with the installation of the manifold system and hooking it into the existing plot irrigation system if installed or valving off the terminal end of the new manifold system. Most often the manifolds will be attached to a micro sprinkler or drip system of one exists on a currently irrigated plot.

4. At well 3 approximately 20 to 30 feet from future location of new wellhead down the water line will need a tap on the side of the 10-inch line for ½ PVC sch 80 or larger up to 1 inch and will run to the control panel near the pump panel. Refer to drawing for reference. The pressure sensor will be provided by the system integrator.

5. At the tank where the new line is run, a tap on the 12-inch line for ½ inch PVC sch 80 or larger up to 1 inch. It will run to the well house and will come up the wall near the other water line and you will drill a hole in the wall and take inside. Refer to drawing for reference inside building.

The pressure sensor will be provided by the system integrator.

6. The pump cabinet will have VFD that has been derated to handle 122 deg F. at full motor current.

If full motor current is 162 amps or less, then the ABB drive ACH580-01-180-4 will handle 122 deg F. If full motor current is more than 162 amps, then the next size up will be needed to maintain 122 deg F. rating.

7. The heatsink will be out the back of cabinet.

8. A 4-inch fan with heater will be in pump cabinet to help with cooling and heating.

9. A 40 to 50 deg F thermostat switch will be used to turn the heater off and on.

10. The concrete pad with the Unistrut racks shall be positioned for the cabinet doors to face north.

Place ground rods as shown on drawing.

11. The system integrator will provide the control cabinet and do all programing as needed for a system to control tank level and be able to control pressure when needed for tank maintenance.

12. New towers will be place at Well #3 future location and existing Well #1 pump house. 60-foot towers will be 25SS040 Rohn tower plus 4 25G 10-foot sections Tessco PN 586787. The system integrator will assist the contractor in setting the towers including grounding and commutation of the towers at both sites. Antennas and antenna cables will be provided by the system integrator. Two 1-inch PVC conduit will be run up the towers on the inside and left open on both ends.

13. Well #3, (when funded as an Add-Option in FY24 and subject to availability of funds), will use the following “DELTA” surge unit SSP05EMA32. A power disconnect and the surge unit will be mounted in a weatherproof box.

14. Power for new Well #3 in the Add-Option part of the SoW will come from the pole as 4 wire “WYE” but the neutral will stop in the main disconnect.

15. Main grounds will be 2/0 bare copper and all connections except inside cabinet and top of towers will be cad welded. All ground rods will be 10-foot copper.

16. Control cabinet will need 1 ea. 120 v ac 20-amp UL489 circuit breaker.

17. All areas associated with the project will have to be surveyed to lay in the irrigation pipe and get the proper flow to all areas.

18. Contractor is responsible for successful installation and testing of the system. It is up to the Contractor to choose the survey method (Lidar or Ground) that has the accuracy required to design and install the system to a fully functioning capability.

19. There are no as-builts of the existing irrigation system or associated existing relevant topo map.

New pipe routing will mirror the existing layout to some extent (except for existing main line pipe routed down the middle of the roads – all new pipes will be laid alongside the road). Two of the main objectives for this requirement is to reroute the main piping that currently runs down the middle of the roads to run alongside the roads (outside ditch line), and to extend out to plots in 3-inch lines to 2-inch manifolds that are currently irrigated and are not currently irrigated and so need the new irrigation infrastructure installed accordingly. Trace tape is not required where there is electrical line laid on top of new irrigation infrastructure otherwise lay trace tap in all other instances.

20. When it comes to valve locations, manifold locations, etc. some will be installed in existing locations and additional throughout the property. The existing system shall be abandoned in place and not disturbed. Any debris generated during this project is the sole responsibility of the Contractor to properly dispose of. All existing wells and the location of the proposed new third well will be part of the overall survey operation.

21. The expected flow rate through the individual manifolds depends on the scientists’ individual research requirements. A peak estimated need of ~3600-4000 gallons per acre per day within a 12-hour period (https://site.extension.uga.edu/pecan/2015/06/irrigation-schedule-for-pecan-production/) is a generalization that can be utilized in the design process. There are ~240 acres of pecan, but not all will need to be irrigated simultaneously, and orchard size varies from ~1 to ~32 acres (and not all will need irrigation). The overall GPM requirement for the capacity of the irrigation system as a whole is the amount that the two existing wells (and future 3rd new well) should individually be able to deliver to every part of the laboratory grounds through the new 10-inch main PVC line, through the 3-inch/2-inch trunk lines and into the 2-inch manifolds. The manifolds will be constructed identically to the greatest extent possible to allow the scientists to control the amount and timing of irrigation. It is very likely that all manifolds will need to be run at the same time - at most 2/3rds of 75% of irrigation to be running simultaneously.

22. The Contractor will hook the new manifolds up to the existing plot irrigation systems or plug the plot side of the manifold if the plot is not currently being utilized.

23. New irrigation piping system burial depth is minimum 48” below ground level at all points until rising to connect to new manifolds. Valve from the main line to the manifold will be buried (with access sleeve and cover) at main line depth to prevent potential freeze damage.

24. Irrigation piping system must be able to handle output well pressure and hydraulic pressure at all points on the irrigation system. Appropriate Schedule of PVC should be specified in all sizes to accommodate this requirement. 80 gpm is anticipated maximum flow as existing manifolds are all 2”. Flow rates from 2” Schedule 80 PVC is what the plot irrigation systems are already designed for. The manifolds will have 2-inch ¼ turn PVC valves and standard 2” sand filter that will use an 80 to 200 mesh changeable filter cartridge (the scientist will approve the final size when the submittal is presented for the valving and filters on the manifolds). The design of the successful proposed system shall meet that requirement as the pipe integrity will be part of the warranty should it fail.

25. The power from the timers will come from the new electrical line being laid alongside the new PVC irrigation system and the timers shall be mounted on the new manifold systems.

26. A new pump house for the proposed new Well #3 is not required and the layout should be similar to the existing Well #2 when installed as the Add-Option subject to funding at a future date.

27. Survey points will need to be included in your final design and pre-construction drawings submitted before project is accepted. Survey points must be adequate to ensure the system elevations are laid out properly. Final drawings of the irrigation system shall be submitted before the Base Option part project will be considered complete. Final installation drawings/ and well schematics of the new Well #3 shall be submitted before the Add-Option part project will be considered complete.

28. Contractor must comply with all state and local erosion control regulations and ensure that the final landscape is flush with the surrounding grounds so plan to keep any excavated dirt by the trenches to backfill and level accordingly.

29. The new irrigation design in the Base Bid does not require a Stamped, Sealed, GA Licensed Engineer in addition to the Registered Surveyor. However, if the system does not perform as required upon final testing, the system will not be accepted by ARS until it performs as required.

Any draft design submitted in your proposal should take into consideration that the final design presented in your submittal to ARS for acceptance prior to purchase of any materials and beginning of construction activities should be verified to perform as ARS requires by experienced professionals. The surveyor does not necessarily have to provide a stamped layout however he must be licensed and therefor competent to provide a comprehensive and accurate survey that our ARS personnel can verify to be accurate before acceptance.

30. The new system, per the SoW, will consist of new irrigation piping from the tower to the manifolds and from the two existing wells to the tower and into the new 10-inch main line as well as a provision in the installation to hook up the new, third well into. the new system. All existing (and future) wells along with the tower will supply water to all the manifolds through the new 10/3/2 inch PVC piping system. The current control system has one well operating at a time to keep the water tower filled. Right now, it is set to run Well #1 for a specified amount of time to fill the water tank and then switch to Well #2 to cycle the wells. There are also sensors in place to tell the system if Well 1 or 2 is not operating properly, etc. and in that event the system will switch wells to maintain water flow. The future addition of Well #3 will be integrated into the existing control system - per System Integrator (EMICC) to cycle along with Well #1 and Well #2. Only one pump operates at a time otherwise excess pressure develops in the water tower supply pipes. Replace the existing pipeline from each well to the water tower. Hook the water tower up to the two existing wells exactly the way they are now with new line (& new valves in the same location as existing valves) and abandon the old line/valves in place.

31. The system is not to be designed as a domestic water system nor will it be chlorinated. The chemical storage building has an existing backflow preventer that shall be replaced in the new piping system.

32. All indicated underground utility lines are general locations and the survey will have to be accomplished when designing the final location of all parts of the system. All existing utilities will have to be located at time of construction activities beginning by the Contractor and the Contractor will be responsible for repairing any existing utilities that are damaged or destroyed during the project.

33. The Contractor’s field superintendent is allowed to cover supervision, QA/QC, and safety duties.

34. The Federal Government is TAX exempt and Contractors are responsible for paying any applicable taxes.

35. The existing well control system infrastructure shall be expanded to include the requirements for the new Well #3 (when it is drilled in the future) in order to facilitate the integration of the new well into the system per design requirements. The current System Integrator (EMICC, Inc.) can be contacted for system upgrade, costing and installation. Howard (478) 955-8868.

36. The Contractor shall coordinate the method and places of water release for pressure control purposes as necessary. The system shall be designed to minimize the amount of water that should need to be released for that purpose and the release in no way can endanger any research or other infrastructure.