Attachment_J-6_RFTOP_Task_Order.Attachment_J-7_Annex_A_Addendum_Items.pdf

Annex A

ADDENDUM ITEMS

RFTOP No. SOL-294-17-000002

Attachments J.3A and J.4B, Drawings:

1. Drawing No. M-TD-081: Add Note 6 as follows: “Where no potential for conflict of distribution line and associated service lines with other utilities exists, 50mm distribution pipelines may be installed at an invert elevation of 200 mm above the top of crown of other same trench water pipelines.”

2. Drawing No. C-DT23, Detail C-213 Type B: Delete this detail in its entirety.

3. Drawing No. M-CD-076, Legend:

a. Revise the second item D for the 250mm Tee to read D’.

b. Revise Item B to indicate a 300mm dia. Flanged Dismantling Joint.

4. Drawing No. Site-015: Revise the top of tank elevation to read “+754.90”.

5. Drawing No. G-009: For row/item nos. 13, 14, 15 and 16, revise the reference specification section to read 15062.

6. Drawing No. Site-013: Revise the first three general notes to read as follows:

a. For Structural Details, refer to Program Standard Drawing nos. S-ER01 through S-ER15.

b. For Electrical Details, refer to Program Standard Drawing nos. E-ER01 and ER02.

c. For Mechanical Details, refer to Program Standard Drawing nos. M-ER01, M-ER02, and

M-ER03.

7. Drawing No. CP-071: Revise fitting and valves in the Legend for Dura Conn. Chambers as follows:

a. F – 250mm Flanged Angle Strainer

b. J – 250mm Flanged Flow Control Valve

c. K – 250mm Flanged Check Valve

d. L – 250mm Gate Valve

e. L’ – 200mm Gate Valve

f. M – 250mm Flanged Dismantling Joint

g. M’ – 200mm Flanged Dismantling Joint

h. N – WS-T 250x250x200mm

i. O – WS Reducer 300/250mm

j. P – 250mm W.S.P

k. U – 250mm Remote Control Monitoring Flow Water Meter (MFM)

l. U’ – 200mm Remote Control Monitoring Flow Water Meter (MFM)

m. Y – WS-T 250x250x75mm

n. Z- 250mm Pressure Reducing Valve

8. Drawing No. CP-071: Revise To the right of Flanged Control Valve “J”, insert item “Z” above, 250mm Pressure Reducing Valve.

9. Drawing No. I-007: Revise Pressure Reducing Valve Tag No. (4816) to read 250mm in lieu of 100mm currently shown.

10. Drawing No. I-003: Revise Pressure Reducing Valve Tag No. (4413) to read 200mm in lieu of 250mm currently shown.

11. Drawing No. CP-070: Revise the callout “Proposed 500mm Steel Pipe line connect with Zif service connection I CB-069” to read “Connect to existing 500mm Ductile Iron Pipeline.”

12. Drawing No. G-003, General Note for Distribution Networks:

a. Revise Note no. 12 to read “For water service connections, see detail C-522. Water service connections and locations are not shown on the drawings.”

b. Revise Note No. 15 to read “The Contractor shall install Tees and service connections with valves for existing and future service connections.”

c. Revise Note No. 16 to read “The Contractor shall coordination with Local

Councils/Municipality for locations of house connections.”

13. Drawing No G-010: Delete row for valve Tag No. 132.

14. Drawing No. P&P-028: Add Tag No. 1802 to the Gate Valve at Station 5+424.

15. Drawing No. M-CD-078: Add Note No. 15 as follows: “Washout outfall pipe diameter to match the larger of the washout pipelines entering the washout chamber.”

16. Drawing No. 138 -SITE-012: Delete the callout for “Drain Catch Basin.”

17. Drawing No. 142 Site-016:

a. Typical Cross Section 1: Revise Asphalt Wearing Course thickness to 70mm.

b. Typical Cross Section 1: Revise Sta. 0+173 to read Sta. 0+125.

18. Drawing No. Site-002: Add the following General Note: “1. For fence installation on existing concrete walls, attach using galvanized metal plate 160x160x5mm shop welded to bottom of corner or line post as applicable. Attach to existing concrete using 4- 12mm dia. bolts/anchors using non-shrink grout or epoxy agent as approved by the Engineer. B200 fair face concrete on top of wall (100 mm thickness) around base of mesh and tubing along the full length of the fencing.”

19. Drawing No. C-DT63, Detail C-507:

a. Revise “Union” to read “Flanged Dismantling Joint”

b. Revise “Gate Valve” to read “Flanged Gate Valve Type GV2”.

20. Drawing Nos. I-001 through I-003, General Notes: Insert note 6 as follows: “Refer to Specification Section 13562 for power supply and communication for the requirements of the electro-magnetic flow meters”

Attachment J.2A, Specifications:

1. Specification Section 02832, Steel Mesh Fences and Gates, Part 2-2.01 Steel Fencing: Under Fabric, replace “150x50mm mesh” with 50x50mm mesh”.

2. Specification Section 13562, Part 2-2.02.01, Magnetic Flow Meter: Delete the 5th and 6th paragraphs in their entirety (beginning “Flow meters….” and “When required…”, respectively), and insert in lieu thereof the following:

“Remote flow monitoring chambers: Flow meter shall be GSM/GPRS powered by dry type lithium battery (IP68/NEMA6P) sized for a minimum of 7 Years operation based on one transmission per day, and also ready to except an external 220V or 24 VAC supply via future renewable energy source or future external power supply.

For reservoir sites and at pump stations’ break tank inlets, where the design includes RTU and/or PLC system, flow meters shall be powered by 220V or 24 VAC with battery to provide a back-up power supply during power failures. Flow Meter output shall be Modbus communication and shall include all required communication modules on the RTU. Backup battery shall be dry type lithium battery (IP68/NEMA6P) sized for a minimum of 7 Years operation based on one transmission per day.

For pumping and well stations where flow meters are connected at the pumps’ discharge, flow meter shall be powered by 220V or 24 VAC, output shall be 4-20mA, totalizer Pulses and relays.”

3. Specification Section 13590: Delete the current part 2-6.01, Radio Path Study, and insert in lieu thereof, the following:

“2-6.01. Radio Path Study. System Supplier shall perform a physical Radio Path Study at each facility location to determine the type of communication equipment needed and the height of antenna towers to achieve the maximum capabilities of the radio communication system and to achieve a line of site or the best radio signal. Contactor shall provide antenna heights up to 12m.

a. The Radio Communication System (RCS) supplier shall provide a coverage map of the existing back-bone radio communication network and the nearest radio FEP.

b. Radio path study shall include the additional FEP required or the upgrades of the existing FEP’s in the radio communication backbone required to achieve the line of site or the best communication UHF signal meeting the criteria herein this section.

c. Reflected Power Study. This should be provided for every radio/antenna combination after construction. The test shows whether the antenna cable is properly terminated.

d. Receive Signal Strength Indication (RSSI). Shall be provided once the radio and antenna are installed. This test shall show whether the radio is within the tolerance to provide a reliable radio signal. The RSSI shall need to be compared against the radio receiver sensitivity. The difference between the RSSI and the radio sensitivity would be the Fade Margin (allowable loss that would still allow the link to work).

e. RCS Performance and design criteria:

i. The Radio Communication System (RCS) shall comprise all equipment and services provided to carry the Owner’s SCADA traffic between the WBWD central control room in Ramallah and the project’s remote sites. The criteria for design and performance of the RCS are as follows:

ii. Bandwidth. The data rate of individual well site communications links shall be

9.6 kbps minimum for UHF and 5 Mbps for Microwave communication. For a system design that aggregates data at intermediate collection points and uses a backbone communications system.

iii. Latency. The maximum latency of an individual communications link shall be no greater than 200 ms. the maximum latency of the end to end communications channel between an individual a well site and the Central Control Room (including all aggregation points and any backbone communications system) shall not exceed 2 seconds.

iv. Reliability. Each individual Radio Frequency communications link shall be engineered for 99.95% reliability. FEP upgrades (if required) shall assure the provision of Back-up power at RCS facilities as needed to support the required reliability.

v. Priority of Service. The RCS shall accommodate both polling and report by exception communications. A report by exception message generated at a well site shall have the ability to obtain the communications channel on a priority basis.

vi. Encryption and Security. The RCS shall use AES-256 encryption of the communications payload. Any software configuration or maintenance access to any RCS components shall have built in security by user password, including at least five programmable authorization levels including monitoring (view), monitoring and acknowledging alarms, control, engineering and system manger levels with respective password.

vii. RSSI: The radio links shall be designed to have higher than 25dB fade margin and received signal strength to be higher than -88 dBm.

viii. Qualifications. All work under this section shall be performed by a Contractor having a minimum of three years’ experience in application, installation and testing of the specified systems and equipment.”