9. Pay for the power consumed until the project has been accepted as substantially complete.

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2 9. Pay for the power consumed until the project has been accepted as substantially complete. A4-2. SECTION ALTERNATES A. Reference Page 2, Paragraph 1.03.: Modification: Add the following paragraph: G. Deductive Alternate Bid DA3 1. Install bar-wrapped concrete cylinder pipe in lieu of steel pipe in Base Bid Item 4. The quoted deduct shall be the reduction to furnish and install 3,390 LF of barwrapped concrete cylinder pipe in lieu of polyurethane coated steel pipe. The deduct also includes the cost to provide an impressed current Cathodic Protection System required for bar-wrapped pipe in lieu of galvanic anodes required for steel pipe. A4-3. SECTION ALTERNATES A. Reference Page 1, Paragraph : Modification: Modify the first two sentences as follows: 5. The Wilson H. Fox Park will be partially opened to the public noon May 21, The boat ramp and western all remaining campsites will be open to the public. A4-4. SECTION UNIT MASONRY ASSEMBLIES A. Reference Page 6, Paragraph 2.10.: Modification: Delete Paragraph 2.10 in its entirety. A4-5. SECTION ELECTRICAL EQUIPMENT A. Reference Page 1, Paragraph 2.01.A.4.a. Addition: Modify the paragraph to read as follows: Contractor shall provide 5 sets of [4-500kcmil (DLO), #4/0G. (DLO)] in 50 foot lengths with corresponding female cam-locks on one end and pigtail connection on the other end. Cam-locks shall be as manufactured by Crouse-Hinds E1016 or approved equal. B. Reference Page 1, Paragraph 2.01.A.5. Addition: Add the following to the end of paragraph 2.01.A.5: Generator Connection Cabinet shall be 1600A, 3-phase, 4-wire, with 5 sets of male Crouse-Hinds E1016 camlocks per phase and ground. Bus bars shall be copper. C. Reference Page 2, Paragraph 2.02.A.2. Addition: Add the following to the end of the paragraph: Pedestal enclosures shall be steel and pedestals shall be suitable for pedestal mounting. The Pedestal shall include terminals suitable for underground loop feed which shall be able to accept up to 2 sets of 250kcmil conductors per phase, and include equipment ground terminals suitable for up to 2 sets of #2/0 AWG. A4-6. SECTION COMMUNICATIONS OPTICAL FIBER HORIZONTAL CABLING A. Reference Page 1, Paragraph Modification: Modify paragraph 1.01 to read as follows: Fiber optic data highway consisting of furnishing, installing, and testing of Fiber-Optic Cable between the two (2) fiber optic patch panels provided under this contract located at the pump station and at the existing water treatment plant sites. Cable shall be installed in direct buried configuration without any splices. Cable shall be placed in inner duct and installed in the conduit routed along the pipeline as indicated in the plans for Contract A, and cable shall also be installed in the fiber-optic conduit system provided by others under Contract B. The fiber-optic conduit system provided under Contract B (by others) will include a maximum of 16 fiber-optic pull boxes. The Addendum No BRA09103 Contract A Raw Water Intake Pump Station

3 maximum linear distance between the fiber optic patch panels is 26,000ft (this distance does not include the amount of cable that shall be coiled in each pull box). The fiber-optic cable procurement and installation shall be coordinated with electrical contractor. See plans for routing provided under Contract A. A4-7. SECTION VIDEO SURVEILLANCE A. Reference Page 4, Paragraph 2.05.A. Modification: Modify paragraph 2.05.A to read as follows: shall be compatible with the existing DVR (Pelco DVR model DX ) and shall provide a minimum of 250GB of additional storage. Provide. A4-8. SECTION BUTTERFLY VALVES A. Reference Page 1, Paragraph 1.02.B.5: Modification: Modify the paragraph as follows to add one additional Acceptable Motor Operator Manufacturer: 5. AUMA 6. No other manufacturers will be accepted. A4-9. SECTION SLUICE GATES A. Reference Page 1, Paragraph 1.02.B.5: Modification: Modify the paragraph as follows to add one additional Acceptable Motor Operator Manufacturer: 5. AUMA 6. No other manufacturers will be accepted. A4-10. SECTION SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) SYSTEM A. Reference Page 6, Paragraph Addition: Add the following paragraph C.: C. The EWC WTP includes two HMI/Operator Work Stations. Both HMIs are located within the same building at the EWC WTP; one HMI is located downstairs running Wonderware Version 10 with a 60,000 I/O license and the other HMI is located above the filter gallery running Wonderware Version 10 with an unlimited I/O license. A4-11. SECTION LOOP DESCRIPTIONS A. Reference Page 2, Loop 101, 102 & 103, Paragraph F.4.a. Addition: Add the following to the of paragraph F.4.a.: The OWS shall also provide an option to operate the pumps based on maintaining the level at the Plant s Terminal Storage Reservoir between an operator adjustable high level and low level set points. A4-12. SECTION VERTICAL TURBINE PUMPS A. Reference Page 2, Paragraph 1.02.A.: Addition: Add RuhRPumpen to the list of Acceptable Pump Manufacturers B. Reference Page 2, Paragraph 1.03.A. Addition: Add the following sentence after ISO requirements: The components of the pump that will require ISO certification include the bowl assembly, impeller and discharge head. C. Reference Page 13, Paragraph 1.07.C.1.: Modification: Modify two lines in the table as follows: Minimum Wire-to-Water Efficiency at Rated Point #1 = 76% 74% Maximum Speed, RPM = Addendum No BRA09103 Contract A Raw Water Intake Pump Station

4 D. Reference Page 14, Paragraph 1.07.C.4.: Modification: Modify one line in the table as follows: Pump Discharge and Column Diameter (I.D.) = 14 A4-13. DELETE THE FOLLOWING SECTIONS: METAL WALL PANELS DRAWINGS: A4-14. DRAWING NO. C-1, SHEET NO. 4 A. Reference Note 4: Modification: Delete Note 4 and replace with the following. 4. Contractor to repair COE Park Roads. See hatching of roads in drawing below. Unhatched roads will only require repairs to damaged areas to meet pre-construction conditions. Hatched roads will be rebuilt or repaved per the legend. See Specification for total park and partial park shut down sequence and requirements for temporary and permanent road repairs. B. Reference Entire Sheet: Clarification: The hatch is difficult to see in the hard copy of the plan set. The plan sheet has been reissued as part of the addendum as a PDF. The hatch is clear in the PDF version. A4-15. DRAWING NO. C-21 A. Reference Notes: Addition: Add the following note: 2. Refer to Sheet E-20 for Fiber Optic Details. See Sheet E-2 for additional information on Oncor Duct Bank Requirements. A4-16. DRAWING NO. C-22 A. Reference Notes: Addition: Add the following note: 2. Refer to Sheet E-20 for Fiber Optic Details. See Sheet E-2 for additional information on Oncor Duct Bank Requirements. A4-17. DRAWING NO. C-23 A. Reference Notes: Addition: Add the following note: 2. Refer to Sheet E-20 for Fiber Optic Details. See Sheet E-2 for additional information on Oncor Duct Bank Requirements. B. Reference Plan View Addition: Add an Electrical Pull Box on the Proposed Oncor Duct Bank at Station 34+20, 25 RT of the 48 Pipe Centerline. Addendum No BRA09103 Contract A Raw Water Intake Pump Station

5 A4-18. DRAWING NO. S-6, SHEET NO. 48 A. Reference Detail 6, Building Section: Vertical Conduit Support Slab: Modification: Adjust the RE:PLAN dimension s left extension line to align with thickened slab edge below typical slab. A4-19. DRAWING NO. S-25, SHEET NO. 67 A. Reference Sheet s Title Block: Modification: Delete the sheet title Transformer Pad and replace with Transformer Pad Guide Detail B. Reference Notes Addition: Add the following notes to Drawing No ALL INFORMATION CONTAINED ON THIS SHEET IS FOR INFORMATION PURPOSES ONLY. PROVIDE A COMPLETE DESIGN FOR A TRANSFORMER PAD SIMILAR TO THAT SHOWN AND WHICH INCORPORATES THE OIL SKIMMER SYSTEM INDICATED IN NOTE #2 BELOW. SUBMIT FOR APPROVAL THE ENGINEERED DRAWINGS FOR THE TRANSFORMER PAD S DESIGN. DRAWINGS SHALL BE SIGNED AND SEALED BY A PROFESSIONAL ENGINEER LICENSED IN THE STATE OF TEXAS. 2. THE UTILITY TRANSFORMER PAD SHALL UTILIZE SCM-FLOW LEAK MANAGEMENT CONTAINMENT AND SHALL BE PROVIDED BY TEXAS ECO SERVICE, INC (TES). COORDINATE WITH TES FOR ALL REQUIREMENTS THAT PERTAIN TO THEIR CONTAINMENT SYSTEM. ADJUST THE TRANSFORMER PAD GUIDE DETAIL SHOWN AS REQUIRED. TES CONTACT: RANDY FREELAN (214) A4-20. DRAWING NO. E-2, SHEET NO. 88 A. Reference: Notes By Symbol No.2: Modification: Modify Notes By Symbol No.2 to read as follows: to Utility provided power pole on Higginbotham Property. RE: C-24 C-23 for location of power pole. Coordinate B. Reference: Notes By Symbol No.4: Modify Notes By Symbol No.4 to read as follows: Contractor shall route duct bank from electrical manhole EMH-1 and Terminate/Cap duct bank 5-0 from manhole conduits in secondary section of utility transformer pad, for future use when electrical service increases.. C. Reference: Notes By Symbol notes: Addition: Add Notes By Symbol No.13. Notes By Symbol No.13 shall read as follows: Cathodic Protection Station, RE: C-7 for location. D. Reference: Plan 1, Site Plan: Addition: Route the duct bank associated with Duct Bank Detail No.5 from the electrical manhole EMH-1 to the utility transformer. E. Reference: Plan 1, Site Plan: Addition: Add a Notes By Symbol No.13 and locate 20 feet North of the meter vault. Route 2 #2, #4G., 1 1/2 Conduit from the Notes By Symbol No.13 to circuit LP1-28. A4-21. DRAWING NO. E-3, SHEET NO. 89 A. Reference: Plan 1, Pump Station Building Power Plan: Clarification: Route the 5 conduits with cable UTIL-P associated with Duct Bank Detail No.6, from electrical manhole EMH-1 to the 480V Switchboard via the Building Exterior Cable Tray. Addendum No BRA09103 Contract A Raw Water Intake Pump Station

6 A4-22. DRAWING NO. E-15, SHEET NO. 101 A. Reference: Panel Schedule LP1: Modification: Refer to Circuit LP1-28. Modify circuit breaker from 20A/1P to be 40A/1P. Modify the load for the circuit from 1000VA to 3750VA. Modify the circuit description to read Cathodic Protection. A4-23. DRAWING NO. E-20, SHEET NO. 106 A. Reference: Detail 1: Modification: Delete Note 1-1/2 HDPE Conduit (Typ 3) and replace with 1-1/2 HDPE Conduit (Typical) Clarification: A single 1-1/2 HDPE Conduit is required to be laid. At each pull box, one conduit enters the vault, one conduit exits the vault and one conduit runs to the post. A4-24. REPLACE THE FOLLOWING DRAWINGS REPLACE DRAWING NO. WITH DRAWING NO. C-1, SHEET NO. 4 C-1, SHEET NO. 4 P-14, SHEET NO. 40 P-14, SHEET NO. 40 RE-3, SHEET NO. 123 RE-3, SHEET NO. 123 RE-4, SHEET NO. 124 RE-4, SHEET NO. 124 RE-5, SHEET NO. 125 RE-5, SHEET NO. 125 RE-6, SHEET NO. 126 RE-6, SHEET NO. 126 END OF ADDENDUM NO. 4 Addendum No BRA09103 Contract A Raw Water Intake Pump Station

Procurement Department Bid Office Customer Center 1 st Floor, Room W. Church Street Jacksonville, Florida 32202

Procurement Department Bid Office Customer Center 1 st Floor, Room 002 21 W. Church Street Jacksonville, Florida 32202 May 24, 2017 ADDENDUM NUMBER: Three (3) TITLE: Construction Services for Arlington