A06_Specifications_REDW_Water_Well.pdf

REDW – PMIS 334284 GENERAL REQUIREMENTS Page 1

REDWOOD NATIONAL PARK

REHABILITATE & AUTOMATE WELL

AT HOWLAND HILL OUTDOOR SCHOOL

PMIS # 334284

140P8423Q0085

STATEMENT OF WORK

GENERAL REQUIREMENTS

PART 1 – SUMMARY OF WORK (SECTION 01 11 00) & DEFINITION OF CLINs (01 27 00)

1.1 WORK COVERED BY CONTRACT DOCUMENTS

A. General: All work outlined below will be performed under a single contract.

B. Project Location: This project is located east of Crescent City at the Howland Hills Outdoor

School.

C. Project Background: Howland Hills outdoor school provides a temporary classroom environment inside Redwood National Park where school-age children come to learn environmental education. The school area is used seasonally, including restrooms and a kitchen with running potable water. During peak use, the school may use up to 1500 gallons of water daily. Average peak day use is likely closer to 500 to 1000 gpd. Much of the year, however, the school is idle due to inclement weather and school not being in session. The facility gets its water from a drilled groundwater well. Due to the limited and cyclic use of the facility, the system is basic and contains no automated controls. Electricity for the well is provided through the manual operation of a propane generator. When the well was initially developed, the estimated well yield was around seven GPM. This yield allowed operators to periodically top off the tank through manual operation during daily trips to the site. In recent years, however, the yield of the well has decreased (the static water level has remained the same), likely through the formation of iron-reducing bacteria. The decrease in yield has become problematic as the existing well pump can now pump water in excess of the yield.

This condition results in the pump overheating and frequently shutting off. In addition, staff must spend more time on-site operating the system and monitoring it so that the pump does not overheat. In early 2023 an attempt was made to treat iron bacteria to restore the well yield. Those efforts largely failed. The park is now in a situation where the estimated well yield is likely closer to 4 GPM, and the current configuration is no longer sustainable. The lowered yield is such that the well can still provide enough water to meet the demand.

However, a lower pumping rate and longer pumping duration are needed. This project aims to reconfigure the system to lower the pumping rate and add controls so that the system can operate in an automatic mode without the need for staff intervention. A new generator is also required.

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D. Project Scope of Work / Definition of Contract Line Items: The Work consists of the following:

1. Contract Line Item No. 0001: Airlift Development

This item shall consist of removing the existing well pump and airlift pumping the existing well to increase the well yield.

2. Contract Line Item No. 0002: Furnish and Install New Well Pump

This item shall consist of furnishing and installing a new well pump.

Measure and payment shall be on a lump sum basis.

3. Contract Line Item No. 0003: System Automation and Controls

This item shall consist of furnishing and installing all components required to automate the well operation as described in the statement of work. This includes but is not limited to removing existing electrical components, furnishing and installing new electrical components, controls, switches, wiring, cables, generator, and components required for a fully operational system.

4. Bid Option A: Furnish and Install a new 10,000-gallon Water Tank.

This item shall consist of removing and replacing the existing water tanks with a single

10,000 tank.

1.2 REFERENCE DOCUMENTS / REPORTS

A. General: The following reference documents/reports are attached or available upon request to supplement the information in the specifications:

1. NPS Forms (RFI, CM-16, and QC Daily Report)

2. Site Location Map with Project Area Limits, Preferred Access, Approved Staging and

Storage Area, and Sensitive Avoidance Areas

3. Screenshot of the original well plan

4. Well report

5. Photo Log of existing conditions

1.3 CODES, STANDARDS, & REGULATIONS

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A. General: The Contractor shall complete all work in accordance with the latest versions of applicable codes, standards, and regulations. The following codes, standards, and regulations are directly related to the project:

1. Water Well Standards: State of California, Bulletins 74-81 & 74-90.

2. National Groundwater Association’s (NGWA) Manual of Water Well Construction

Practices, latest edition.

3. AWWA A100 – Standard for Water Wells, latest revision.

4. AWWA B301 – Standard for Liquid Chlorine, latest revision.

5. AWWA C654 – Disinfection of Wells, latest revision.

6. National Electric Code

1.5 GOVERNMENT-FURNISHED ITEMS

A. The Government may furnish products and materials for incorporation into the work. If the government furnishes products or materials for incorporation into the work:

1. The government will arrange and pay for the delivery of government-furnished items to the project site based on the contractor’s approved construction schedule.

2. After delivery, the government will inspect delivered items for damage. If items are damaged, defective, or missing, the government will arrange for replacement.

3. The contractor is responsible for receiving, unloading, and handling government-furnished items at the project site for use in the work.

4. The contractor is responsible for protecting government-furnished items during storage, handling, and the work, including damage from exposure to the elements.

5. If government-furnished items are damaged as a result of the contractor’s operations, the contractor shall repair or replace the items in kind.

B. Government-Furnished Items: None

1.6 PUBLIC / STAFF USE OF THE SITE

A. General: The project site will be closed to the public during construction. The Contractor shall at all times conduct his operations to ensure the least inconvenience to the public and staff. Temporary closures may be permitted upon specific written approval of the

Contracting Officer.

B. Other Contracts, Work, and Events: During the contract performance period, there may be other contracts, work, or events occurring in the park or within the project area limits that may affect the Contractor’s operations. The Contractor shall conduct his operations in consideration of these other activities. If the other activities are affecting the critical path of the construction schedule, the Contractor shall document the issue in the daily reports and report the issue to the Contracting Officer.

1.7 CONTRACTOR USE OF SITE

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A. General: Limit construction operations to the project area limits as outlined on the attached

Site Location Map.

B. Park Regulations: Ensure all personnel (contractors, subcontractors, and vendors) entering or working in the park are familiar with and obey all park regulations. Law enforcement rangers will intervene if they perceive any unsafe or unlawful activity.

C. Site Access: The contractor shall access the project site as outlined on the attached Site

Location Map. Do not drive vehicles off road or access non-project areas without permission from the Contracting Officer or their representative.

D. Working Hours: Regular work hours shall be limited to daylight hours from 7:00 a.m. until

7:00 p.m. Monday through Friday, excluding government holidays. Work outside regular hours requires advance approval from the Contracting Officer.

E. Staging and Storage: Confine the staging and storage of equipment and materials to the areas as shown on the Site Location Map or as established at the preconstruction meeting. The

Contractor will be responsible for the security of all equipment and materials at the jobsite.

F. Property Damage: The Contractor is required to report missing, lost, stolen, or damaged property occurring within the park. This report must be made to a Law Enforcement Ranger or Park Dispatch at the first available opportunity.

G. No Smoking Policy: Smoking is prohibited inside or outside within 25 feet of any buildings in the park. This applies to existing buildings and buildings under construction or renovation.

Discarding of tobacco products or debris anywhere other than into designated tobacco receptacles is considered littering and subject to fines.

PART 2 – WORK RESTRICTIONS (SECTION 01 11 40)

2.1 WORK RESTRICTIONS

A. General: The Contractor must comply with the following work restrictions:

B. Vehicles / Heavy Equipment:

7. Rules of the Road: All vehicles and heavy equipment will comply with posted traffic regulations, including speed limits and double-yellow center lane markings. Vehicles and heavy equipment shall take every safe opportunity to use paved roadside pullouts in order to allow faster moving traffic to pass. Failure to comply with traffic regulations will result in a citation being issued to the driver.

8. Vehicle Parking: The contractor shall park vehicles and heavy equipment in designated areas as shown on the Site Location Map or as established at the preconstruction meeting.

Vehicles are not permitted within long-term or overnight parking along park roads or in associated overlooks / pullouts.

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9. Driveways and Entrances: The contractor shall keep driveways and entrances serving the premises clear and available to the government, government employees, and emergency vehicles at all times.

10. Vehicle Exhaust: All vehicles will be properly maintained to ensure that the exhaust produced is within legal limits. Effects of excessive vehicle exhaust may be subject to enforcement of State and Federal laws regarding emissions as well as those regarding threatened and endangered species.

11. Spills: The Contractor shall be responsible for any cleanup efforts required in accordance with 40 CFR and all applicable state environmental quality laws regarding disposal and cleanup of hazardous / industrial wastes. The Contractor must immediately notify the

Contracting Officer of spills.

12. DOT Compliance: All vehicles are to be compliant with all DOT requirements including but not limited to driver with appropriate license class, medical examiner card as appropriate with license class, carrying three (3) triangles or three (3) flares, mounted fire extinguisher, and valid DOT safety sticker.

13. Slow Vehicles: The Contractor is to notify the Contracting Officer of slow vehicles that may cause traffic delays or extended traffic lines. Vehicles that are slow are requested to enter the Park AFTER 2:00 p.m. and exit the Park BEFORE sunset.

14. Oversized Vehicles: Oversized vehicles are defined as vehicles where the width of the vehicle or load exceeds one lane (i.e., beyond the center line of the paved road).

Oversized vehicles must not exceed the clearances along the Park road corridor.

Oversized vehicles will require an escort and drivers must avoid driving on the edges of the Park road. The Contractor is to notify the Contracting Officer of oversized vehicles, scheduled dates, and estimated arrival times at the park entrance; and the identity of who is escorting the vehicle (e.g., police, contractor, etc.). Vehicles that are oversized are requested to enter the Park AFTER 2:00 p.m. and exit the Park BEFORE sunset.

15. Tracked Equipment: Heavy equipment with metal tracks will not be allowed on paved asphalt or concrete roads without adequate protection to prevent permanent track marks, spalling, and other damage. The method of protection (such as secured plywood or metal plates), shall also not damage the roads. Tracked vehicles will be allowed on non-paved surfaces as long as the terrain is restored to preconstruction condition. All damage created by tracked equipment shall be repaired / restored at no additional expense to the government.

16. Road & Weight Restrictions: All vehicle load, weight, and size limitations, as established by State law, apply to vehicles operated on the Park road (36 CFR § 4.11).

No loads heavier than the current load rating for park roads and bridges will be permitted.

C. Resource Protection:

1. General: The Park is committed to protecting natural and cultural resources found within the park and adjacent lands. Obey all park rules and regulations.

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2. Preservation of Natural Features: Prevent damage to natural surroundings.

a. Do not attach ropes, wires, guy lines, cables, or chains to trees or vegetation. Restore damaged areas and replace damaged trees, vegetation, and grass at no additional expense to the government.

b. Avoid wounding trees and roots. Cut only a minimum amount of trees and branches as approved for project.

3. Invasive Species Prevention: The introduction of non-native invasive species can threaten the park’s rare and endangered species or can create new populations of non-native species not traditionally found in the park. The Contractor is required to inform personnel, subcontractors, and vendors to thoroughly clean all vehicles, equipment, machinery, tools, supplies, and materials prior to packing / loading. Vehicles, machinery, and equipment must be clean and free of debris prior to entering the park.

4. Endangered Species: Endangered species are protected by Federal law. Obey all park regulations. Drivers must obey all traffic laws and watch for animals on or alongside road or at the jobsite. Contact Park Dispatch immediately if animal is hit or injured or will not move off the road. The following measures are required to minimize disturbance to endangered wildlife:

a. Work shall be conducted to ensure the work area is cleaned up at the end of each work shift so that loose tools, debris, and materials are not left out in a manner that could present a hazard to a listed species.

b. Noise and vibrations of equipment shall be kept to a minimum when working in the vicinity of a listed species.

c. Hazmat spill prevention protocols shall be employed when using gas-powered equipment.

d. Ensure loose nails and screws do not make it to the ground when working on exterior surfaces as these can be detrimental to listed species.

5. Archaeological Resources: Archaeological resources are physical evidence of past human activity, including evidence of the effects of that activity on the environment.

Archaeological resources are found above and below the ground and underwater. The

Contractor, or designee, will observe all ground-disturbing activities in archaeological sensitive areas. If the Contractor discovers resources, the Contractor shall stop work or relocate to a non-sensitive area and notify the Contracting Officer immediately. The Park may also have an Archaeological Monitor at the jobsite who is authorized to stop work upon discovery of archaeological resources. Archaeological resources typically found in the park or at the project site will be discussed further at the preconstruction meeting.

6. Soundscape / Noise: The Contractor shall minimize noise levels at the project site to protect the soundscape of the park. Perform noise-producing work in less sensitive hours of the day or week or as directed by the Contracting Officer.

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PART 3 – PROJECT MANAGEMENT (SECTION 01 31 00)

3.1 SUBMITTALS

A. Division 01 Submittal Documents: The following documents shall be submitted no later than

14 calendar days after contract award and a minimum of seven (7) calendar days prior to the

Preconstruction Meeting. If all of these documents have not been received prior to the scheduled Preconstruction Meeting date, the meeting will be cancelled and the Notice to

Proceed (NTP) will not be issued. Work shall not commence until written Notice to Proceed

(NTP) has been issued.

1. Letter designating the Project Superintendent.

2. Construction Schedule - Submit a baseline schedule with start date, end date, major work activities and durations, estimated pre-final (substantially complete) and final (entirely complete) inspection dates, and other major milestones. Provide updates to baseline schedule as needed or as requested (when there is a change to the critical path).

3. Schedule of Values (SOV) – Submit a schedule of values with a breakdown of component work activities for which progress payments will be requested. The total costs for the component work activities shall equal the total contract price.

4. Accident Prevention Plan (APP) – Submit a “site specific” accident prevention plan with the following information (at a minimum).

a. Name of the supervisor responsible for executing the plan.

b. Emergency contact phone numbers.

c. Map of local area emergency medical facilities relative to the jobsite.

d. First aid and emergency medical procedures / forms.

e. Company safety plan / protocol.

f. Job hazard analysis (JHA) completed for each major work activity.

5. Quality Control Plan (QCP) – Submit a “site specific” quality control plan with the following information (at a minimum).

a. Name of the supervisor responsible for executing the plan.

b. Organizational flow chart showing key staff / subcontractors.

c. Qualifications of key staff and subcontractors with applicable licenses / certificates.

d. Communications and reporting plan / procedures / forms (include NPS daily report form, RFI form, and CM-16 form along with Contractor forms).

7. A list of Subcontractors for this project (if applicable)

8. Written statements from subcontractors certifying compliance with applicable labor standard clauses (if applicable).

9. Satisfactory evidence of liability insurance coverage and workman’s compensation for the Contactor and all subcontractors.

B. Technical Submittal Documents: The following documents shall be submitted to the

Contracting Officer prior to construction mobilization. If these documents have not been

REDW – PMIS 334284 GENERAL REQUIREMENTS Page 8 received and approved by the NPS prior to construction start, the construction start date may be delayed.

1. Product Data – Submit product cut sheets / material data on all products to be used for approval. Indicate the size, model, or type of each recommended product.

3.2 PRECONSTRUCTION MEETING

A. Preconstruction Meeting: Before the start of construction, the Contracting Officer will arrange for a preconstruction meeting either on site or via teleconference. The meeting agenda will include the following topics:

1. NPS Roles & Responsibilities

2. Key Contractor Personnel

3. Coordination with Subcontractors

4. Correspondence & Submittal Procedures

5. Submittals

a. Status of Division 01 Submittals

b. Status of Division 02-49 Submittals

6. Park Rules & Regulations

7. Work Hours and Weekend, Holiday, and Night Work

8. Project Information

a. Park Access & Vehicle Reporting

b. Jobsite Access & Parking

c. Staging, Storage, and Laydown Area(s)

d. Temporary Facilities & Controls

e. Jobsite Restrictions

f. Resource Protection

g. Weather, Climate, Environmental Conditions

h. Reference Documents

i. Other Contracts / Ongoing Work

9. Labor Standards Provisions

10. Labor Interviews

11. Payroll Reports

12. Payments to the Contractor

13. Change Orders / Modifications

14. Progress Meetings

15. QC Daily Reports

16. Inspections

17. Acceptance and Rejection of Work

18. Closeout Procedures & Submittals

19. Contract Period of Performance

20. Notice to Proceed

3.3 REQUESTS FOR INFORMATION (RFIs)

A. General: On discovery of the need for additional information or interpretation of the Contract

Documents, the Contractor shall prepare and submit an RFI utilizing the NPS form.

1. Contracting Officer will only respond to RFIs submitted by the Contractor.

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2. Coordinate and submit RFIs in a prompt manner to avoid delays in the work.

B. RFI Form: Include a detailed, legible description of the subject or item needing information or interpretation on the RFI Form with:

1. RFI number, numbered sequentially.

2. Date.

3. RFI subject.

4. Specification Section number and title and related paragraphs, if applicable.

5. Drawing number and detail references, if applicable.

6. Photographs or sketches, if applicable.

7. Contractor's suggested resolution. If the Contractor's suggested resolution impacts the contract time or the contract sum, Contractor shall state the impact in the RFI.

C. Response to the RFI: The Contracting Officer will review each RFI, determine the action required, and respond accordingly.

PART 4 – SUBMITTAL PROCEDURES (SECTION 01 33 23)

4.1 SUBMITTAL PROCEDURES

A. CM-16 Transmittal Form: All submittals shall be transmitted using NPS CM-16 form sent via email or an approved File Transfer Protocol (FTP) site. No action will be taken on a submittal item unless accompanied by the CM-16 transmittal form. Complete all applicable fields, sign the form, and attach all supporting documentation.

B. General Submittal Procedures:

1. Processing Time: Allow 7 days for NPS review of a submittal. When review is complete, an e-mail notification will be sent to the Contractor. No extension of contract time will be authorized because of failure to transmit submittals in a timely manner.

2. Approved Equals: For each item proposed as an “approved equal” submit supporting data including:

a. Comparison of the salient characteristics of the proposed item with that specified.

b. Name, address, and telephone number of vendor.

c. Manufacturer’s literature.

d. Compliance with the Buy American Act.

3. Electronic Submittals: Transmit all submittals except physical samples in PDF format.

PART 5 – SAFETY REQUIREMENTS (SECTION 01 35 23)

5.1 SAFETY REQUIREMENTS

A. General: The Contractor must comply with the following safety requirements:

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1. First Aid Equipment: Provide adequate first aid equipment for all contract employees for the hazards associated with the types of ongoing construction work at the site.

2. First Aid Training: Provide adequate training to all Contractor personnel to ensure prompt and efficient application of first aid.

3. Personal Protective Equipment (PPE): Provide personal protective equipment (PPE) that meets applicable OSHA and ANSI standards for all contract employees.

4. Hazardous Materials: Hazardous materials are defined as explosive, flammable, poisonous, corrosive, oxidizing, irritating, or otherwise harmful substances that could cause death or injury. Store hazardous materials in accordance with manufacturer’s and OSHA recommendations. Maintain MSDS onsite for each chemical used on the jobsite.

Immediately report all spills of hazardous materials to the contracting officer.

5. Safety Meetings: At a minimum, conduct weekly "toolbox" safety meetings. These meetings shall be conducted by a job superintendent or crew leader and attended by all construction personnel at the worksite. Topics need to coincide with work scheduled for the week.

6. Emergency Contacts: Post telephone numbers and reporting instructions for ambulance, hospital, fire department, police, and park dispatch in conspicuous locations at the site.

7. Emergency Medical & Accident Reporting: In the event of an emergency / medical incident, the Contractor shall Dial 911 as needed. The Contractor shall also contact Park

Dispatch for any medical emergency, traffic accident, or personal injury occurring within the Park. Park Dispatch is called so that the entrance station will be prepared should any emergency vehicles need to enter the Park and so that any available Emergency Medical

Services personnel in the Park might respond until such time as the ambulance arrives.

PART 6 – QUALITY REQUIREMENTS (SECTION 01 40 00)

6.1 QUALITY REQUIREMENTS

A. General: The Contractor is responsible for all quality control to guard against defects and deficiencies in the work. Inspect and test work as needed to ensure that the quality of materials, workmanship, construction, finishes, and functional performance are in compliance with applicable specifications, drawings, codes and standards, and the QC Plan.

B. Quality Control (QC) Daily Reports: Submit quality control daily reports documenting the progress and quality of the work. The daily report shall be typed, legible, and complete and include representative photos. The daily report shall be submitted on a daily basis no later than the day after the work. The NPS prefers that the contractor use the NPS daily report form, but an alternate form will be allowed if it contains all major sections of the NPS form.

PART 7 – TEMPORARY FACILITIES & CONTROLS (SECTION 01 50 00)

7.1 TEMPORARY FACILITIES & CONTROLS

A. No temporary facilities or utilities are required for this project.

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PART 8 – EXECUTION (SECTION 01 73 40)

8.1 EXECUTION

A. Examination: Examine the project area and site facilities and verify compatibility between existing conditions and the scope of work.

B. Preparation: Take field measurements or conduct surveys to verify quantities and dimensions before procurement and fabrication or installation.

D. Cutting & Patching: Examine surfaces to be cut and patched and conditions under which cutting and patching are to be performed. Before patching, verify compatibility with and suitability of substrates, including compatibility with in-place finishes or primers. Proceed with installation only after unsafe or unsatisfactory conditions have been corrected.

E. Installation: Install all systems or components according to the specifications, manufacturer’s recommendations, permit conditions (where applicable), and local, State, and Federal codes, standards, and regulations. All systems or components shall be complete and operable.

F. Correction of the Work: Upon discovery of defects or damage of new work or to existing facilities damaged by new work, repair or replace damaged systems or components and restore substrates and finishes.

G. Progress Cleaning: Clean the project site and work area on a daily basis. Keep site free of waste and debris in proper containment. Properly dispose of all waste and debris offsite.

H. Final Cleaning & Waste Disposal: At the completion of the work, clean all surfaces and remove all waste materials, trash, tools, equipment, machinery, and surplus items from the project site and legally dispose of all waste items.

PART 9 – CLOSEOUT PROCEDURES (SECTION 01 77 00)

9.1 SUBSTANTIAL COMPLETION AND FINAL INSPECTION

A. When the project, or a designated portion of the project, is substantially complete, the

Contractor shall request a pre-final inspection in writing at least one (1) calendar days in advance of the inspection date.

B. If the work is determined to be substantially complete at the pre-final inspection, the

Contracting Officer will prepare a Letter of Substantial Completion with a Punch List of deficiencies to be corrected before final inspection / acceptance. The Contractor shall complete the work described in the Punch List within ten (10) calendar days, as weather permits. Once all Punch List work is complete, the Contractor shall request a final inspection in writing to arrange for the confirmation of punch list completion.

C. If the Contractor fails to complete the Punch List work within this timeframe, the Contracting

Officer may either replace or correct the work with an appropriate reduction in the contract price or charge for re-inspection costs in accordance with the Inspection of Construction clause of the contract.

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D. If the work is determined to be not substantially complete at the time of the pre-final inspection, the Contracting Officer will notify the Contractor in writing. The Contractor may request a new pre-final inspection; however, all re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction clause of the contract.

E. After all deficiencies have been corrected and the project is complete, a Letter of Final

Acceptance will be issued by the Contracting Officer.

9.2 CLOSEOUT SUBMITTALS

A. Operation & Maintenance (O&M) Manual: Submit to the Contracting Officer with all applicable operation and maintenance information including but not limited:

1. Preventative maintenance schedule for all major components.

2. Operating instructions, if applicable.

3. Product / material cut sheets (all approved products used on the project).

6. Product warranties for individual products and systems.

7. A one (1) year Contractor-issued warranty on all workmanship starting from the date of final acceptance.

9.3 DEMONSTRATION & TRAINING

A. Demonstration & Training: Provide onsite demonstration and training to NPS operators and staff on the proper, safe operation of all new systems and components.

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TECHNICAL REQUIREMENTS

PART 1 – REHABILITATE EXISTING WELL

The first part of this project is intended to rehabilitate the existing well with the intention of restoring the well yield. It is unknown if this effort will be successful. The effort in early 2023 included shock chlorination, physical cleaning (brushing) and limited well development (bailing). The NPS intends to try one additional effort (air lift development) to rehabilitate the well and restore yield. The following provides the generalized requirements.

1. Air Lift Development

Contractor shall remove the existing pump and develop the well using air-lift pumping well until discharge is clear. Air lifting will proceed from the top of water column to the bottom of the screen interval, if possible. Contractor shall provide enough pipe to lower the air line to the bottom of the screened interval. Ensure that compressor is adequately sized such that proper development can occur.

2. Disinfect Well

Well disinfection shall be in accordance with AWWA A100 (latest edition).

3. Sampling & Testing

Sampling and Testing will be by the NPS

PART 2 – FURNISH AND INSTALL NEW EQUIPMENT & CONTROLS FOR AUTOMATION

Description of Required System Operation

The proposed system must be able to pump groundwater from the existing (redeveloped) well to the existing on-site storage tank. Operation of the well pump must be controlled by a new float switch to be installed in the water storage tank(s). The tanks are intended to remain approximately full. When the tank level drops to a level around 8 to 12 inches below full, the float switch must close and turn the well pump on.

When the tank reaches full, the float switch must open and shut the well pump off. The pump must include a “run dry” detection system that automatically shuts the pump off in the event that the water level in the well drops below the pump invert. Electric service to run the pump shall be from lithium storage batteries that are intermittently charged with a new propane fueled generator. The system must include an electrical inverter to convert DC current from the batteries to AC current used by the system. The system must also include a dedicated battery charger. With the regard to the electrical system, the NPS understands that there may be viable alternative configurations. The baseline system shall include a single phase AC generator with standalone inverter/charger and 24V lithium batteries. Contractors may propose alternative electrical configurations. For example, the use of a DC generator and/or well pump with internal inverter, or a battery system that uses a different DC voltage will be considered. (In all likelihood, the baseline system will be

REDW – PMIS 334284 GENERAL REQUIREMENTS Page 14 the most cost effective.) The NPS originally intended to use PV solar arrays to generate power at this site, however that was determined not to be feasible due to dense tree cover.

The system must include a controller that detects the battery bank output voltage. When the voltage output drops below a predetermined set point the system must automatically start the generator and begin the charging process. When the voltage output indicates that the battery bank is full, the controller must automatically turn off the generator. The system must be able to operate during the charging process.

Finally, the system must automatically inject disinfectant (sodium hypochlorite) into the water discharge pipe while the system is pumping. The system will use the existing chemical feed pump. The feed pump will be electrically connected/relayed to the pump circuit such as the pump will only receive power while the pump is on. As an additional safety measure, the chemical feed pump shall be controlled by a flow switch such that the chemical feed pump only turns on when there is flow in the discharge pipe.

The following are the basic technical requirements for the various components. The NPS identified several potential products that could potentially meet the requirements assuming a baseline configuration. These products are provided for reference only. The contractor will be responsible for product selection and ensuring that the system safely operates as described.

Well Pump

A. Supply a well pump capable of delivering a minimum of 2 U.S. GPM at a total dynamic head

(TDH) of 134 feet.

B. The pump shall be driven by a Premium Efficiency motor, providing the highest levels of operational reliability and energy efficiency. The premium efficiency motor shall be an integral part of the pump unit.

C. The motor shall be connected for operation on a 240 V, 1-phase, 60 Hz electrical supply service, unless an alternate electrical configuration is proposed and accepted.

D. Starting – Soft Start

E. Variable Speed

F. Motor Protection

a. dry running

b. overvoltage and undervoltage

c. overload

d. overtemperature

G. Pump Sleeve: Stainless steel

H. Include new drop cable. Size per manufacturer’s requirements.

I. Set at same depth as existing. Reuse existing drop pipe if possible, or replace if required for pump compatibility.

J. Salvage existing pump to the NPS.

Possible Product: Grufundos SQE 2-55

Note on Well Pump: The NPS would also consider the use of a “dole valve” to regulate the discharge rate, rather than replacing the pump. The existing pump is relatively new but is

REDW – PMIS 334284 GENERAL REQUIREMENTS Page 15 oversized for the available yield. The successful contractor should examine the system and provide a recommendation if a dole valve is feasible and otherwise advisable. Ideally the NPS would like to have a mean by which to adjust the discharge of the pump if the yield of well changes again. The proposed pump included a variable frequency drive function to potentially allow for that. If a dole valve is used in lieu of a new pump a contract modification would be issued.

Float Switch

A. Install a new float switch in the water storage tank(s).

B. Switch shall be NSF 61 Certified

C. Adjustable range of ~8” to ~24” (range may be wider)

D. Sized and compatible with selected electrical system

E. Direct control, or control via relay depending on electrical configuration

F. Run a new underground electrical line placed in plastic conduit between the existing pump house and tank(s)

Possible Product: SJE PumpMaster WPS

Batteries

A. 24 V Lithium Ion (unless otherwise approved)

B. 1000 Ah (min)

Possible Product: Xantrex Lithium Ion

Inverter/Charger

This configuration may vary. Some pump systems may come equipped with a built-in inverter. Other system may include a combination inverter/battery charger. Depending on the electrical configuration, a separate charger and inverter may not be required. If required, the charger/inverter shall b sized and configured to be compatible with electrical system.

Possible Product: Xantrex Freedom SW Inverter/Charger, 2500W

Generator:

A. Fuel: Propane

B. Minimum Rating 5500W

C. Single phase or DC output

D. Generator must be securely fastened to the concrete floor.

E. Capable of automatic start/stop via the automatic controller.

F. Properly vent exhaust

G. Salvage existing generator to NPS

Automatic Generator Starter

Must be capable of automatic control of the generator.

Possible Product: Xantrex, Freedom SW Xanbus Automatic Generator Controller

REDW – PMIS 334284 GENERAL REQUIREMENTS Page 16

Flow switch

Sized to work with existing piping and selected electrical configuration, NSF Certified.

Chemical Feed Controller Switch

Install a separate chemical feed controller that receives the electrical signal from the flow switch and controls the chemical feed pump.

Possible Product: Harwell CF-112

Chemical Feed Pump

The existing chemical feed pump is a 120V, 1Ph, Pulsatron unit. The contractor may reuse the existing chemical feed pump and configure the electrical system to be compatible if changes are required. As an alternative, the contractor may provide a new chemical feed pump that is compatible with the new electrical system. If new unit is selected, unit shall be a Pulsatron or LMI sized to match existing.

Electrical Panels & Disconnects

Where required, furnish and install according to NEC.

Building Lighting

The existing building has a single light bulb (120V) mounted on the ceiling in each room to provide lighting. Like the well, the lights only works when the generator is running. Connect the lights on a on a designated circuit (with separate wall switches), separate from the rest of the system. Depending on the electrical configuration, furnish and install new lights if required. For example, the existing light is intended for a 120 V circuit, but if the new system uses low voltage power, a new low voltage (LED) light will be required. 500 to 1000 Lumens.

Water Storage Tank

The existing water storage system consists of two 2500 gallon tanks that are hydraulically connected.

If there is adequate funding the NPS plans to replace these tanks with a single 10,000 gallon storage tank to provide for greater buffer during periods of high demand. This item is included as a bid option and will only be exercised if funding is available. If executed the new tank shall be a 10,000 HDPE tank that is NSF certified.