ADDENDUM No. 5 TO CONSTRUCTION CONTRACT DOCUMENTS BRIDGEPORT PUBLIC UTILITY DISTRICT (BPUD) Arsenic Removal Project Construction Contract

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1 ADDENDUM No. 5 TO CONSTRUCTION CONTRACT DOCUMENTS BRIDGEPORT PUBLIC UTILITY DISTRICT (BPUD) Arsenic Removal Project Construction Contract May 15, 2017 THE BIDDER SHALL EXECUTE THE CERTIFICATION WITHIN THE BID FORM ACKNOWLEDGING RECEIPT OF THIS ADDENDUM. * * * * * * * * * * * * * * * * * * * * BID FORM 1. The Bid Form has been revised to consolidate all of the work and to correct discrepancies in quantities from the plans. The revised bid form is attached. 2. The number of new 8 gate valves in the previous bid form was incorrect; the number has been corrected in the attached bid form to 11 (10 off site and 1 on site). Further, on sheet PP1, note 16, the three referenced 8 gate valves are existing, the work required is for setting valve boxes to the new finished grade. 3. An item has been added for Sheeting, Shoring, and Bracing 4. The List of Proposed Subcontractors (to be submitted with bids), page will be replaced with the revised form attached. 5. The List of Proposed Subcontractors (to be submitted after bid opening), page is eliminated in its entirety. DRAWINGS 1. The drawings have been revised. The attached document lists changes by sheet number. 2. The electrical drawings have been revised significantly to change the control system to XiO cloud based SCADA. Contacts at XiO that are available for discussion of this project are: a. Paul Sagues at b. Mark Puckett c. Kevin Liscovitz Addendum 5 Page 1 of 3

2 3. Sheet E4 note 1 states Yaskawa VFD. An or equal will be considered. 4. The General Contractor is responsible for all piping shown on Sheet C7. SPECIFICATION TABLE OF CONTENTS 1. A Table of Contents has been prepared for the Technical Specifications, it is attached. SPECIFICATION SECTION SUMMARY 1. Revise Section 1.4.C.2 as such:. Removal and salvage to Owner of bollards; capping of existing abandoned well remove concrete collar and cut off existing abandoned concrete filled wells to 1 minimum below finish grade; relocation of existing propane tank. SPECIFICATION SECTION PACKAGE ARSENIC REMOVAL SYSTEM 1. Revise Section 1.5 Submittals as such: In subsections B, C, D, and G, replace the word Contractor with ARS Supplier. 2. Delete Section 1.9.B Installer in its entirety. 3. Revise 2.1.B to read as such: PART 2 - PRODUCTS 2.1 ARSENIC REMOVAL SYSTEM (ARS) B. Manufacturers: 1. Isolux MELsorb by MEL Chemicals, Inc. a. 500 Point Breeze Road, Flemington, NJ b. 1 (908) c Evoqua Water Technologies by Siemens Corp. a. 1 (719) b AdEdge Water Technologies, LLC a. (866) b Layne Christensen Company a N Alma School Rd, Ste 207 b. (602) c Engineer Approved Equal Addendum 5 Page 2 of 3

4 Bridgeport Public Utility District Arsenic Removal Project Construction Unit Price Bid Schedule ITEM DESCRIPTION QUANTITY UNIT COST TOTAL Bonds, Insurance, Mob., Demob., Temporary 1 BMP, Traffic Control 1 Lump Sum /LS 2 Sheeting, Shoring & Bracing 1 Lump Sum /LS 3 Demolition 1 Lump Sum /LS 4 Site Grading 1 Lump Sum /LS 5 Landscaping 1 Lump Sum /LS 6 8" C900 PVC Piping 303 Linear Feet /LF 7 8" PVC SDR 35 Sewer Piping 231 Linear Feet /LF 8 8" Ductile Iron Piping 210 Linear Feet /LF 9 8" Gate Valve 11 Each /EA 10 8" Pipe Concrete Encasement 3 Each /EA 11 Water Main Cut and Tie, Twin Lakes Road 6 Each /EA 12 Constuct 8" Sewer Connection 1 Each /EA 13 Air Release Valve & Lateral 2 Each /EA 14 2" Water Service Line 1 Lump Sum /LS 15 2" Meter Box & Lateral 1 Each /EA 16 3/4" Meter, Meter Box & Lateral 1 Each /EA 17 10" PVC SDR 35 Storm Drain Piping 160 Linear Feet /LF 21" RCP CL IV Storm Drain, Reinforced Concrete 18 Cap, & Flared Ends 1 Lump Sum /LS 19 24x24 Drop Inlet 1 Each /EA 20 Grouted 6" to 8" Rip Rap 108 Square Feet /SF 21 Aggregate Base Shoulder on site 235 Square Feet /SF 22 4" AC on 6" Aggregate Base on site 3437 Square Feet /SF 23 Pavement Patch and Driveway Within Twin Lakes Road 2941 Square Feet /SF 24 Concrete Flatwork (propane tank pad, rolling gate pad) 115 Square Feet /SF 25 Chain Link Fence 300 Linear Feet /LF 26 Wrought Iron Fence & Man Gate 31 Linear Feet /LF 27 Rolling Gate w/operator 1 Lump Sum /LS 28 On-Site Conduit Wire & Trenching 150 Linear Feet /LF 29 Propane Gas Line, On-Site 60 Linear Feet /LS 30 Propane Regulator and Valves 1 Lump Sum /LS 1 of 2 Bid Form

5 Bridgeport Public Utility District Arsenic Removal Project Construction 31 Water Treatment System Installation 1 Lump Sum /LS 32 Piping Inside Building 1 Lump Sum /LS 33 Pre-Filters 1 Lump Sum /LS Flow Meters, Pump to Waste Valve, Check Valve 34 and other Valves 1 Lump Sum /LS 35 Chemical Feed: Hypochlorite 1 Lump Sum /LS 36 Drainage Piping 1 Lump Sum /LS 37 Ventilation Systems 1 Lump Sum /LS 38 Emergency Shower/Eyewash 1 Lump Sum /LS 39 SCADA: XiO Components and Installation 1 Lump Sum /LS Building (Building Pad, Slab, Doors, Heat, 40 Bathroom, etc.) 1 Lump Sum /LS 41 Well House Improvements (Sheet A1.1) 1 Lump Sum /LS Total Total of Base Bid in words: Contractor 2 of 2 Bid Form

6 Bridgeport Public Utility District Arsenic Removal Project - Construction LIST OF PROPOSED SUBCONTRACTORS (to be submitted with bids) The name and address of each subcontractor who will be paid at least one-half of 1 percent of the prime contractor's total bid shall be listed below. To be deemed a responsive bid, this form must be submitted even if no subcontractors are required to be listed. In that case, the bidder should state None (or similar language stating that no subcontractors need to be listed) in the space below. Name Contact Information Portion of Work Address & Phone # March Bid Form

7 Bridgeport Public Utility District Arsenic Removal Project SHEET C1 1. New Sheet A1.1 Well House added to Project Index. 2. Date changed to 5/12/2017 throughout drawing set. SHEET C2 1. New General Note #24: All concrete exposed to freeze/thaw environments shall be 4,000 psi 28-day compressive strength, with 5% ±1% air entrainment, see concrete specification New General Note #25: Traffic and street parking on Twin Lakes Road shall not be impacted by construction in the right-of-way during the week of the Fourth of July. SHEET C4 1. Note pointing to existing well house now reads: Remove Ex Well House, Ref Sheet C7 for Piping Modifications. SHEET C5 1. Correction to Landscape Notes #1, now reads: Top Dress Landscape Area and Disturbed Slopes with 3-8 Native Cobble. This was specifically changed to address the area to the north of the new treatment building. SHEET C6 1. Addition to the 21 Storm Drain/Driveway Crossing Detail: Addition of Slurry Backfill below the Concrete Cap. 2. Addition to the 21 Storm Drain/Driveway Crossing Detail: Addition of reinforcing steel. 3. Addition of clean-out to the 10 PVC Storm Drain line. 4. Deletion of drainage swale around the Twin Lakes Well House in favor of Positive Surface Drainage as sheet S=1%. 5. Lowering of the Finished Grade surface on the northern side of the building affecting the foundation depth on that wall and on the north end of the west wall Drawing Changes List Page 1 of 2

8 Bridgeport Public Utility District Arsenic Removal Project 6. Correction to the Finished Floor Elevation of the New Water Treatment Building, now reads Correction to the Edge of Pavement elevation at the north-east corner of the new treatment building, now reads SHEET C7 1. Addition of note pointing to the spacing in front of the new electrical panel that reads: 30 Minimum clear space is required in front of electrical panels. 2. Addition of illustration of the piping from the bag filters to the new vessels to match the Section D-D Detail. 3. Previous connection from the Twin Lakes Well existing underground raw water line to new treatment building will now connect inside the new Twin Lakes Well house to the rotated pump discharge. SHEET PP1 1. Extend AC Pavement Patch areas to large square at Kingsley Street and full width of Twin Lakes Road in front of site. SHEET A1 1. Addition of leader/text in front of electrical panel that reads 30 Minimum Clear Space is Required in Front of Electrical Panels. SHEET A Entire new sheet requiring changes to the well discharge and a new building. SHEETS E1 THROUGH E7 1. Significant revisions Drawing Changes List Page 2 of 2

9 Bridgeport Public Utility District Arsenic Removal Project Construction Contract Technical Specifications Table of Contents DIVISION 1 GENERAL REQUIREMENTS Summary 1: Price and Payment Procedures 1: Substitution Procedures 1: Administrative Requirements 1: Construction Progress Schedule 1: Submittal Process 1: Quality Requirements 1: Temporary Facilities and Controls 1: Product Requirements 1: Execution and Closeout Requirements 1:10 DIVISION 2 SITE CONSTRUCTION Site Clearing 1: Fill 1: Soils for Earthwork 1: Excavation 1: Trenching 1: Asphalt Paving 1: Disinfection of Water Utility Distribution 1: Rolling Gate, Operator, and Swing-Gate 1:7 DIVISION 3 - CONCRETE Cast-in-Place Concrete 1:19 DIVISION 4 MASONRY Not Used DIVISION 5 - METALS Miscellaneous Metal Fabrication 1:5

10 DIVISION 6 WOOD AND PLASTICS Rough Carpentry 1: Glue- Laminated Beams 1:5 DIVISION 7 THERMAL AND MOISTURE PROTECTION Building Insulation 1: Metal Roof Panels 1: Metal Wall Panels 1: Flashing and Sheet Metal 1: Joint Sealers 1:4 DIVISION 8 DOORS AND WINDOWS Steel Doors and Frames 1: Rolling Overhead Doors 1: Door Hardware 1:4 DIVISION 9 - FINISHES Gypsum Drywall Systems 1: Painting 1: Coating for Steel Water Storage Tank 1:4 DIVISION 10 - SPECIALTIES Utility Identification 1:2 DIVISION 11 EQUIPMENT Not Used DIVISION 12 FURNISHINGS Not Used DIVISION 13 SPECIAL CONSTRUCTION Arsenic Removal System 1:16

11 DIVISION 14 CONVEYING SYSTEMS Not Used DIVISION 15 - MECHANICAL HVAC System 1: Public Water Utility Distribution Piping 1: Sanitary Utility Sewerage Piping 1: Vibration and Seismic Controls for Plumbing Piping and Equipment 1: Water Utility Distribution Valves 1: Sanitary Waste and Vent Piping 1: Sanitary Waste Piping Specialties 1: Propane Fuel Piping 1: Emergency Plumbing Fixtures 1: Commercial Water Closets and Fixtures 1:4 DIVISION 16 - ELECTRICAL Electrical Provisions 1: Grounding and Bonding 1: Hangers and Supports for Electrical Systems 1: Electrical Identification 1: Conductors and Cables 1: Raceways and Boxes 1: Electrical/Instrumentation 1:40 DIVISION 17 - CONTROLS

39 PANEL BOARD 'LA' BOOSTER PUMP BUILDING DIRECTORY LOAD BKR CIR CIR BKR LOAD DIRECTORY LIGHTING /1 1 A 2 20/1 600 TREATMENT CONTROLS EF B EF-1 & UH-2 RECEPTACLES C RECEPTACLES ROLL UP DOOR A INTOUCH AND RECEPT P B 10 20/ UH-1 & EF-3 P C CP-1 WH A CP-1 SOLENOID /1 15 B 16 20/1 800 Gate Operator SPARE /1 17 C 18 20/1 100 CONTROL POWER SPARE /1 19 A SPARE SPARE 0 21 B 22 0 SPARE SPARE 0 23 C SPARE SPARE 25 A 26 SPACE SPACE 27 B 28 SPACE SPACE 29 C 30 SPACE 31 A B C A B C 42 CONNECTED LOAD VA ( 41 A) OTHER NOTES: A= 4812 VA 40 A 120/208V., 3PH, 4W B= 4850 VA 40 A 150 AMP MCB, 10kAIC C= 5052 VA 42 A 200 AMP BUS