S02_Attachment-1_SOW_FSH_Repair Irrigation System.pdf

STATEMENT OF WORK

REPLACE IRRIGATION WATER FILTER SYSTEM, JOCKEY PUMP,

AND MOTOR & INSTALL PUMP VFD INPUT LINE REACTORS

FORT SAM HOUSTON NATIONAL CEMETERY

1520 HARRY WURZBACH RD., SAN ANTONIO, TX 78209

A. The Contractor: Shall furnish all labor, material, equipment, and supervision necessary to replace the irrigation filter system, jockey pump and motor; install new drainage for the filter discharge; and install VFD input line reactors at Fort Sam Houston National Cemetery in accordance with drawings, specifications, and per applicable standards and requirements.

B. System Description and Background:

1. Main Pumps “RWP-2A” & “RWP-2B”:

a. Config: Close-set lineshaft vertical turbine

b. Motors: U.S. Motors, vertical, 150HP, 1780 RPM, 460V/60Hz/3-phase.

c. Pumps: National Pump Company, H12HC, 5-stage

d. Design Flow: 975 GPM @ 105 psi and 1525 RPM

2. Jockey Pump Motor, “RWP-1”:

a. Config: Close-set lineshaft vertical turbine

b. Motor: U.S. Motors, vertical, 15 HP*, 3560 RPM, 460V/60Hz/3-phase.

c. Pump: National Pump Company, M6MC, 4-stage*

d. Max Flow: 121 GPM @ 110 psi and 3179 RPM

e. Min Flow: 116 GPM @ 100 psi and 3103 RPM

(* To be replaced with this scope.)

3. The design operating sequence of the system is as follows

a. Reuse Water Pump (Jockey RWP-1) and Variable Frequency Drive (VFD-1) is controlled by pump control pressure transmitter and PLC in the Pump Control

Panel located in the Pump Station. The PLC controls the pump and VFD via 4-20 mA signal from the pressure transmitter. Jockey RWP-1 maintains a minimum discharge pressure of 100 psi. Jockey RWP-1 stops when the pressure exceeds more than 110 psi at the minimum speed.

b. Main Reuse Water Pump (RWP-2A) and Variable Frequency Drive (VFD-2) is controlled by pump control pressure transmitter and PLC in the Pump Control

Panel. The PLC controls the pump and VFD via 4-20 mA signal from the pressure transmitter. Main RWP-2A starts and Jockey RWP-1 stops when the discharge pressure drops below 100 psi for more than 30 seconds. RWP-2A maintains a minimum discharge pressure of 100 psi. Main RWP-2A stops when the discharge pressure exceeds 110 psi at the minimum speed for more than 30 seconds, and

RWP-1 starts and maintains a pressure of 100 psi.

c. Main Reuse Water Pumps (RWP-2A & RWP-2B) alternate starts every 24 hours at a preset time.

d. All Reuse Water Pumps are provided with an adjustable minimum run time set for

30 seconds.

e. All pumps shut down when water level in the pump station wet well drops to the low water level.

C. The Work: Shall include, but shall not be limited to the following (not necessarily in the order indicated):

Automatic Screen Filter

1. The Contractor shall remove and replace the screen filter system (currently Tekleen), bypass, and filter control with dual self-cleaning screen filters.

2. Demo the filter, bypass, and appurtances starting from the first 12-inch flange outside of the pump house; demo up to the last 12-inch flanged fitting (45-degree elbow) before the line dips below grade. Retain the first existing 12-inch isolation gate valve and reinstall in place of the existing bypass tee fitting. Demo the five (5) concrete pipe support stands that are in the way of the new installation.

3. Install four (4) 8-inch isolation butterfly valves for the filters’ inlets and outlets. Install a

10-inch isolation butterfly valve for the main bypass. Install necessary reducer fittings to connect the 10-inch filter inlet and outlet to the irrigation system 12-inch main.

4. Install two (2) V-Series automatic self-cleaning screen filters Model V-1500-10-200 as provided by VAF™ Filtration Systems (by Evoqua). Each filter shall provide uninterrupted filtration for up to 2120 gallons per minute (GPM) through 316L stainless steel filter body and 200-micron 316L stainless steel weave-wire filtering screen. The screen surface area shall be 1300 square inches and shall consist of no less than 32% open area. The filtering element shall consist of 3 layers constructed of 316L stainless steel. The filtering element layers shall be the 1) filtering screen, 2) dispersion screen and

3) the structural screen. The filter housing and cover shall be manufactured from 316L stainless steel. Filter housing and internal assembly seals shall be constructed of EPDM.

The filter body assembly shall be capable of accepting interchangeable filtering screen elements from 1500 to 10 micron. Filter body coatings shall not be required.

5. Install new 2-inch electric flush valve with stainless steel ball valve body and 24V actuator in a NEMA 6P housing. Differential pressure across the filtering screen shall be continuously monitored and the flush cycle threshold shall be adjustable. The flush valve shall activate the automatic cleaning feature of the screen utilizing only the flush waste flow water pressure during the flush process to drive the six (6) suction scanner nozzles.

The cleaning mechanism assembly shall be constructed of 316L stainless steel and glass filled Nylon. The suction scanner nozzle assembly shall be constructed of CPVC. The minimum pressure required during flush shall be 35 psi. The filtering process shall remain uninterrupted during the flush cycle.

6. Install filter controller with fault indicator (24V terminal provided for external alarm) and reset. The filter control system shall be provided by the filter manufacturer. The filter controller shall control all aspects of each filter’s operation, including but not limited to flushing by: differential pressure (DP) as the default; time and DP (DP will hold precedence); continuous flush; and manual flush.

7. Install five (5) new 8” thick x 24” wide cast-in-place reinforced pipe support blocks with

2’ wide x 4’ long x 1’ thick footers as shown on the contract drawings. Provide and install new welded and coated steel pipe support stands; anchor bolt to new concrete blocks. Provide and install new hot-dipped galvanized u-bolt pipe anchors to go around pipe; u-bolt shall have cross-linked polyolefin applied to shank (any part in contact with water pipe). Provide and install high-density thermo-plastic semi-rod pipe support to separate the pipe from the concrete block; the thermoplastic compressive strength shall be no less than 15 ksi, tensile strength of 9.4 ksi.

Discharge Drain Pipe and Catch Basin

8. The Contractor shall pipe the filter discharge line to the new catch basin. Transition from the 2” NTP filter discharge line to a 4-inch Sch. 40 PVC pipe to the catch basin.

9. Install a new 36”L x 36”W x 48”D square precast concrete catch basin a with lightweight

FRP or composite 30-inch diameter manhole with steel support frame according to the contract drawings and specifications.

10. Install approximately 555 linear feet (LF) of 6-inch solid, smooth interior wall Sch. 40

PVC drainage pipe with cleanouts including appropriate trenching and backfill according to the contract drawings and specifications from the catch basin to the new concrete outlet headwall and riprap. The drainage pipe shall be installed along the lines and grades shown on the drawings and maintain positive drainage (1.25% minimum unless otherwise noted). Install 6-inch cleanout/inspection ports, installed flush with the finish grade as indicated on the contract drawings. The cleanouts shall have threaded plugs.

11. Strip the live turf along the proposed drain line path to the proposed drain outlet. Trench for the drain line according to the contract drawings. Trench width shall be at least 23 inches wide and Cemetery staff will mark the approximate locations of utilities; however, the Contractor shall be responsible for accurate utility locations. Protect from damage existing, crossing irrigation laterals, sub-mains and other utilities that will be encountered during construction; hand dig in these areas. There is one expected utility crossing where the Contractor shall be required to either go under or over a 4-inch water line (at unknown depth). There are irrigation control wires either direct buried or in conduit that will also need to be avoided. The Contractor shall also be required to bore a short distance under a chain link fence with concrete support near the outlet. Any excess excavated material not reused shall be disposed of appropriately off site. Contractor shall install 4-foot high orange, plastic construction fencing around any open excavations for the protection of the staff.

12. Place and compact enough backfill and 3 inches of imported clean, amended topsoil in order to restore all surfaces and grades. Provide and install certified “Celebration”

Bermuda sod for all disturbed areas in accordance with the contract specifications.

13. Reinstall any fencing that was required to be temporarily removed to access the outlet construction.

Jockey Pump and Motor

14. The Contractor shall remove and replace the pressure maintenance pump (i.e. Jockey

RWP-1), a lineshaft vertical turbine pump; and replace the vertical motor drive with the following makes and models or approved equal to meet operating conditions:

a. Pump: National Pump Company®, hollowshaft vertical turbine, model

M6MC, 5 stages, 4.53-inch impeller trim, enclosed impellers.

b. Motor Drive: U.S. Motors, vertical P-base, 254 LP-base frame, 20 HP, medium thrust, 460V/60Hz/3-phase

c. Motor Options: NEMA Premium Efficient

Self-Release Coupling (SRC)

Totally Enclosed Fan Cooled (TEFC)

Inverter Duty/Ready

d. Max Speed: 3600 RPM (3540 RPM)

e. Max Flow: 135 GPM @ 315 TDH;

f. Pump Des. Eff.: 70%

g. Operating Range: 121 GPM @ 110 psi to 116 GPM @ 100 psi

h. Features: Stainless steel casing and discharge head

Sand handling design

15. The work shall be all inclusive to provide fully functional irrigation pumps and motors at the completion of the work. The work includes, but is not limited to:

a. Mechanical and electrical disconnection(s).

b. The removal and reinstallation of the East pump house roof for hoisting/rigging of the motor, line shaft, discharge pipe, and pressure maintenance pump.

c. All electrical work (fully inclusive) associated with the removal of the existing motors and the installation of the new jockey pump including but not limited to disconnection, re-connection, new wiring, new conduit, new electrical boxes, electrical fittings/accessories, and testing to provide fully functional pump operation.

d. All labor, material, and equipment associated with the connection of the pump to the motor drive including testing and demonstrating to the Contracting Officer’s

Representative (COR) the full functionality of the repaired system.

e. Disposal of the existing jockey pump, and salvage and turnover of the existing 15 HP motor to the COR.

f. All labor, material, and equipment associated with testing the completed assembly and providing documented test results.

16. After completion of all equipment, component, and material installations, perform a full system functional test and demonstrate to the COR the full operation/functionality of the new filter, pump and motor, and the irrigation motor/pump unit has been fully coordinated with the existing irrigation control system. Perform a pumping test in accordance with industry standards to determine actual pumping capacity (GPM), total head (ft), and pumping level (ft).

Input Line Reactors

17. The Contractor shall install input line reactors for both the RWP-1 (jockey pump) and

RWP-2A/B (main pumps) variable frequency drives (VFD) in the existing VFD enclosure for harmonic mitigation. Install the RWP-2A/B VFD reactor on the bottom of the enclosure just to the left of the RWP-2A/B VFD and install the RWP-1 VFD reactor above the RWP-1 VFD on the upper left corner of the back panel. The reactors shall come from one manufacturer such as Trans-Coil International (TCI) or approved equal who specializes in active and passive filters. The reactors shall be low-impedance (i.e.

3%) type. The RWP-2 VFD reactor (VCI model KDRG3L or approved equal) shall be rated 200 HP, 240 Amps, 480 VAC. The RWP-1 VFD reactor (VCI model KDRD1L or approved equal) shall be rated 25 HP, 34 Amps, 480 VAC.

Input Line Reactors

18. The Contractor shall install input line reactors for both the RWP-1 (jockey pump) and

RWP-2A/B (main pumps) variable frequency drives (VFD) in the existing VFD enclosure for harmonic mitigation. Install the RWP-2A/B VFD reactor on the bottom of the enclosure just to the left of the RWP-2A/B VFD and install the RWP-1 VFD reactor above the RWP-1 VFD on the upper left corner of the back panel. The reactors shall come from one manufacturer such as Trans-Coil International (TCI) or approved equal who specializes in active and passive filters. The reactors shall be low-impedance (i.e.

3%) type. The RWP-2 VFD reactor (VCI model KDRG3L or approved equal) shall be rated 200 HP, 240 Amps, 480 VAC. The RWP-1 VFD reactor (VCI model KDRD1L or approved equal) shall be rated 25 HP, 34 Amps, 480 VAC.

D. General Conditions:

1. Haul away & dump debris and waste to an approved disposal site.

2. Remove, cut, alter, replace, patch and repair existing work as necessary to install new work. Existing work to be altered or extended and that is found to be defective in any way, shall be reported to the COR before it is disturbed. Materials and workmanship used in restoring work shall conform in type and quality to that of original existing construction, except as otherwise shown or specified.

3. Thoroughly clean up the work area at the end of each day’s work, and at completion of the project. Leave premises clean and free of waste, scrap, used equipment, or other material intentionally or incidentally delivered to the site by Contractor or Contractor’s personnel. Haul away & dump debris and waste to an approved disposal site.

4. The Contractor shall preserve and protect all structures, equipment, and vegetation (such as trees, shrubs, and grass) on or adjacent to the work site not to be removed and do not unreasonably interfere with the work required under this contract. If any limbs or branches of trees are broken during contract performance, or by the careless operation of equipment, or by workmen, the Contractor shall trim those limbs or branches with a clean cut and paint the cut with a tree-pruning compound as directed by the Contracting

Officer.

5. The Contractor shall protect from damage all existing improvements and utilities at or near the work site and on adjacent property of a third party, the locations of which are made known to or should be known by the Contractor. The Contractor shall repair any damage to those facilities, including those that are the property of a third party, resulting from failure to comply with the requirements of this contract or failure to exercise reasonable care in performing the work. If the Contractor fails or refuses to repair the damage promptly, the Contracting Officer may have the necessary work performed and charge the cost to the Contractor.

6. All utilities required for the continuous operation of all existing facilities shall be maintained in service at all times except when disruptions are needed. The Contractor shall inform the COR and the Contracting Officer (CO) in writing for such disruptions and obtain approval from the CO in writing at least 2 weeks prior to such need. When option exists, implement options to minimize interruption of services to the facilities.

7. The Contractor shall coordinate with the COR for parking, material storage, temporary portable restroom facilities, and any other needs for the work. Public access to the

National Cemetery shall not be impaired.

8. The Contractor shall assume sole responsibility for safety of all persons on or about the construction site, in accordance with applicable laws and codes. Guard all materials in accordance with the safety provisions according to OSHA and Associated General

Contractors of America (AGC).

E. Standards of Employee Conduct:

1. The National Cemetery Administration honors veterans with a final resting place and lasting memorials that commemorate their service to our Nation. National Cemeteries are national shrines. The standards of work, appearance, and procedures performed by the contractor at this cemetery shall reflect this nation’s concern for those interred there. Due to the sensitive mission of the cemetery, contractor personnel must exercise and exhibit absolute decorum, composure, and stability at all times.

2. Contractor personnel shall be required to adhere to the following standards of dress and conduct, as briefly mentioned here, while performing work in the National Cemetery.

These standards and regulations are enforceable under Title 38, U.S.C., Part I, Chapter 9, Section 5901.

3. Clothing shall be presentable and suitable to the work while maintaining proper appearance and decorum indicative for a National Shrine. Uniform shirts and hats are preferred. Clothing shall be clean and cleanliness and personal hygiene are imperative. T-shirts and/or tank tops as outer garments are prohibited. Protective/safety clothing and shoes shall meet or exceed OSHA and state requirements.

4. Behavior and language must be appropriate, reverent, and respectful at all times.

5. Eating and drinking (except water) is prohibited in the work areas and within sight of a committal shelter during a service.

6. Use of intoxicating beverages, any tobacco products, and illegal drugs on the Cemetery premises is strictly prohibited.

7. Contractor personnel shall not lean, sit, or stand on or against headstones or monuments.

No tools, equipment or other items will be placed or leaned on headstones or monuments.

8. The Contractor shall be responsible for maintaining satisfactory standards of personnel conduct and work performance and shall administer disciplinary action as required. The

Contractor is expected to remove any employees from the Cemetery for cause, to include, but not limited to, safety violations, other misconduct in performance of duty under these specifications and/or conduct contrary to the best interests of the Government. If the

Contractor fails to act in this regard, or the reason for a removal is immediately required to protect the interests of the Government, the COR may direct the removal of an employee from the premises. Contractor objections to any such action will be referred to the Contacting Officer (CO) for final resolution; however, the Contractor will first immediately comply with COR direction pending any CO final resolution at a later time or date. The Contractor will not be due any type of compensation for their costs incurred as a result of an employee being removed for cause; unless the removal is directed by the

COR and is later found invalid and/or unreasonable by the Contracting Officer.

F. Time of Completion: The project shall be completed within 120 calendar days after contract

Notice to Proceed. Work outside of the Cemetery’s normal operating hours of 7:00 am to

4:30 pm, Monday through Friday, excluding observed Federal Holidays, will not be permitted without prior approval of the COR. The Contractor shall not commence performance of work until the Contracting Officer has conducted a preconstruction meeting or has advised the Contractor that a preconstruction meeting is not required.

G. Code Compliance: All work shall be performed in accordance with the specifications. It shall be the Contractor's responsibility to comply with all the applicable local, state and federal laws and regulations. The Contractor shall apply and obtain all applicable permits to comply with local, State and Federal regulations and requirements. The Contractor shall remove and dispose of all waste materials and construction debris and comply with all applicable local, State and Federal regulations and requirements. All waste materials and debris specified shall be removed from the Cemetery grounds by the Contractor at its own expenses, including all applicable permits and fees.

H. Contractor Quality Control:

1. Contractor Supervisor/Superintendent: A competent and experienced English-speaking

Contractor Supervisor/Superintendent shall be provided by the Contractor whenever work is being performed - other than trash and debris pick-up.

2. The Contractor Supervisor shall review and approve submittals, ensure all specifications are being met, inspect the quality of work performed, ensure contract work does not conflict with ceremonies and funerals, ensure employees are is adequately supervised and proper conduct maintained, and certify the completed work for payment and other purposes.

I. Attachments:

1. Attachment 1, Pictures;

2. Attachment 2, Drawings;

J. Project completion: The project site shall be protected and/or restored to a condition equal to that existing prior to the commencement of work. Upon completion of contract, deliver work complete and undamaged. Existing work disturbed or removed as a result of performing required new work, shall be patched, repaired, reinstalled, or replaced with new work, and refinished and left in as good condition as existed before commencing work.

END OF STATEMENT OF WORK

ATTACHMENT 1

PICTURES

Figure 1: Irrigation filter, valves, discharge pipe, control, concrete supports, etc. to be replaced with dual filter system.

Figure 2: Back-side of filter system (bypass), showing filter control and

Filter concrete support to be removed.

Figure 3: Demo start point. Retain this valve and reinstall. Figure 4: Demo end point.

Figure 5: Filter control to be replaced. Figure 6: Jockey pump motor drive to be replaced.

Figure 7: VFD enclosure (for input line reactors).

Figure 8: Approximate location of new catch basin Figure 9: Path of new drain line around pond

(where gator parked). (east side, looking south).

Figure 10: Path of new drain line around pond (south side, looking west).