Date of Addendum: June 4, 2015 Bid Opening: Wednesday June 10, 2015, 1:30 P.M. Local Time

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1 J. R. WAUFORD & COMPANY Consulting Engineers ADDENDUM NO. 1 WATER SYSTEM IMPROVEMENTS CONTRACT PAINTING AND RENOVATION OF THE 800,000 GALLON STEEL SOUTH WATER TREATMENT PLANT CLEARWELL HENDERSON WATER UTILITY HENDERSON, KENTUCKY JRWCO JOB NO Date of Addendum June 4, 2015 Bid Opening Wednesday June 10, 2015, 130 P.M. Local Time 1. The following Contractors are pre-qualified to submit bids for Contract Painting and Renovation of the 800,000 Gallon Steel South Water Treatment Plant Clearwell Deig Bros. Lumber & Construction Co., Inc A St. Evansville, IN Phone Fax PPMI Construction Company 5201 Middle Mt. Vernon Rd. Evansville, IN Phone Fax M. Bowling, Inc. 503 B 5th Street Henderson, KY Phone Fax The attendee sheet from the Pre-Bid Conference is attached. 3. Attached is the Questions and Clarifications document. 4. Section 6. Cleaning, Repairing, and Painting Existing 800,000 Gallon Steel Ground Level Clearwell, Paragraph 5.a. Interior Cleaning and Surface Preparation, Page DS 6-6 Modify paragraph as follows a. Interior Cleaning and Surface Preparation The Contractor shall utilize a low free silica (less than 1.0%) and low dusting blast abrasive for this project. The entire interior surface of the tank shall be cleaned in one continuous operation in accordance with the requirements stipulated at Society for Protective Coatings Surface Preparation Specification No. 10 Near-White Blast Cleaning to establish a blast profile of 2.0 to 2.5 mils. Alternatively,

2 J. R. WAUFORD & COMPANY Consulting Engineers Page 2 of 3 a plan for cleaning and priming the interior of the tank in sections may be submitted by the Contractor for the Engineer s consideration. This shall be accomplished in a manner that does not produce hazardous waste as described at Paragraph 3. Special Requirements of this Section. Immediately following the Near-White Blast Cleaning operations and before any primer or caulking is applied to the freshly blasted surface, an ultra-violet light (black light) shall be used to inspect the entire interior surface for oil, grease or wax residues. If any oil, grease or wax residue or areas which have not been properly cleaned are identified, they shall be recleaned or blasted until they are shown by the ultra-violet inspection to be free of oil, grease and wax. The Contractor shall furnish the ultra-violet light inspection equipment. AFTER MANDATORY REPAIR WORK ON THE TANK INTERIOR DESCRIBED ELSEWHERE AT THIS SECTION IS COMPLETED, RECLEANING IN ACCORDANCE WITH THE REQUIREMENTS STIPULATED AT SOCIETY FOR PROTECTIVE COATINGS SURFACE PREPARATION SPECIFICATION NO. 10 NEAR-WHITE BLAST CLEANING SHALL BE PERFORMED AT THE VICINITY OF THOSE AREAS REPAIRED. Due to the necessity to open abrasive blast clean the entire interior tank surface for inspection prior to beginning coating operations, portions of the interior tank surface may develop a thin rust or oxidation layer between the time the initial Near-White Blast Cleaning is performed and the time primer or caulking is applied. If the surface temperature of the tank in the area to be painted drops below the temperature that is five degrees Fahrenheit above the dew point between the time the Near-White Blast Cleaning is performed and the time priming or caulking operations begin in that area, or if more than 12 hours pass after the Near-White Blast Cleaning is performed before priming or caulking operations begin, the Contractor shall reclean the area to be immediately primed or caulked in accordance with the requirements stipulated at Society for Protective Coatings Surface Preparation Specification No. 10 Near-White Blast Cleaning. If the area recleaned by Near-White Blast Cleaning is not immediately primed or caulked and the interior tank surface temperature drops below the temperature that is five degrees Fahrenheit above the dew point, or 12 hours pass after the Near-White Blast Cleaning is performed, the area to be primed or caulked shall be recleaned again in accordance with

3 J. R. WAUFORD & COMPANY Consulting Engineers Page 3 of 3 the requirements stipulated at Society for Protective Coatings Surface Preparation Specification No. 10. No abrasive blast cleaning operations shall be conducted when the tank interior surface temperature is less than five degrees Fahrenheit above the dew point. The Contractor shall plug and protect the tank inlet and outlet pipe at all times to prevent damage and the entrance of debris. 5. Detailed Specifications, Section 6. Cleaning, Repairing, and Painting Existing 800,000 Gallon Steel Ground Level Clearwell, Paragraph 5.b., Exterior Cleaning and Surface Preparation, Page DS 6-7 Insert the following sentence at the beginning of the paragraph The Contractor shall utilize a low free silica (less than 1.0%) and low dusting blast abrasive for this project. 6. Detailed Specifications, Section 6. Cleaning, Repairing, and Painting Existing 800,000 Gallon Steel Ground Level Clearwell, Paragraph 6.h.(2) Roof Vent, Page DS 6-10 Modify the first sentence of the paragraph as follows A suitable aluminum frost-proof vent shall be furnished and installed in the tank roof. 7. Replace BID FORM Pages BF-6 and BF-8 with the attached Pages BF-6* and BF-8*.

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5 Page 1 of 3 PRE-BID QUESTIONS AND CLARIFICATIONS CONTRACT PAINTING AND RENOVATION OF THE 800,000 GALLON STEEL SOUTH WATER TREATMENT PLANT CLEARWELL HENDERSON WATER UTILITY HENDERSON, KENTUCKY Bid Date Wednesday, June 10, 2015 Time 130 P.M. Local Time Questions/Answers and Clarifications 1. Can the inspection videos of the interior of the clearwell be made available to bidders? The inspection video which was completed in September of 2013 may be viewed by accessing the following url http//tinyurl.com/ swtp-clearwell-video 2. Will the secondary clarifier which is proposed to be converted to a temporary clearwell support a temporary roof? See Section 5, Paragraph 3.f. of the Project Manual. 3. Will the 20-inch temporary HDPE piping be buried? The 20-inch temporary HDPE piping shall be buried and covered with steel plates at the driveway crossing as shown on the Plans. At other locations, the temporary 20-inch HDPE piping may be installed on top of the ground. 4. How much pressure will be on the 20-inch temporary HDPE piping? The temporary piping shall be tested to 30 psi in accordance with Section 4, Paragraph 7 of the Project Manual. The actual working pressure of the 20-inch temporary HDPE piping will be less than the required test pressure. 5. General Note No. 10 on Sheet 1 of the Plans indicates that the Owner has the right to take possession of all temporary piping materials used for the project. How should these materials be delivered to the Owner? The Owner has indicated that they do not desire to take possession of the temporary piping materials for this project. Temporary piping materials shall be removed and disposed of by the Contractor in accordance with the last sentence of General Note No. 10 on Sheet 1 of the Plans.

6 Page 2 of 3 6. If unknown utility conflicts are discovered during the excavation process for installation of temporary piping, will the Contractor be required to relocate the utilities at no additional cost? See General Conditions, Paragraph 5.04 and Section 1, Paragraph 12 of the Project Manual. 7. Will the existing utilities be located for the Contractor? See Section 1, Paragraph 12 of the Project Manual. If requested by the Contractor, the Owner will assist the Contractor when locating utilities on the South Water Treatment Plant Site. 8. The Project Manual indicates that paint samples used for lead testing were obtained from the interior of the South Water Treatment Plant Clarifiers. Will lead testing be provided for the interior coating system of the 800,000 gallon clearwell? If requested by the Contractor, the Owner will provide testing for up to two (2) samples of the interior coating system of the 800,000 gallon clearwell for lead after the clearwell is drained for the project. If it is determined that the interior coating system has a lead content which is significantly higher than the values reported in the Project Manual, an additive change order will be considered by the Owner for containment and handling of hazardous paint debris. 9. When was the existing coating system applied to the 800,000 gallon clearwell? See Section 6, Paragraph 1 of the Project Manual. 10. Is it acceptable to cut an access door in the tank wall? The Engineer and Owner will consider a proposal from the Contractor to cut an access door in the tank wall; however, any proposal shall include a structural analysis of the tank and opening which is prepared and sealed by a professional engineer registered to practice in the Commonwealth of Kentucky. The opening shall be repaired by the Contractor and the tank shall be returned to its original condition upon completion of the project. Welding shall be in accordance with Section 6 of the Project Manual. 11. Are the temporary roof and baffle to be installed on the secondary clarifier (temporary clearwell) required to be removed by the Contractor? See Section 5, Paragraph 3.h. and Section 5, Paragraph 4 of the Project Manual. 12. Is the Contractor required to repaint the entire secondary clarifier (temporary clearwell)? No. See Section 5, Paragraph 3.h. and Section 5, Paragraph 4 of the Project Manual. 13. Are supports required for temporary piping? See Section 4, Paragraph 5.f. of the Project Manual.

7 Page 3 of Is the Contractor required to provide a walkway over the above ground temporary piping between the filter building and the chemical building? No. 15. Will the temporary clearwell need to be completely enclosed/covered? The sides of the temporary clearwell are not required to be covered; however, the requirements listed at Section 5, Paragraph 3 of the Project Manual shall be met.

8 BID FORM 1999 MAY BID FORM C CONTRACT PAINTING AND RENOVATION OF THE 800,000 GALLON STEEL SOUTH WATER TREATMENT PLANT CLEARWELL WORK TO BE PERFORMED IF ORDERED BY THE ENGINEER ITEM NUMBER APPROXIMATE QUANTITY DESCRIPTION WITH UNIT BID PRICE WRITTEN IN WORDS UNIT PRICE TOTAL PRICE 1. 2,000 Sq. In. Pit repair fill-welding for pits deeper than 1/8-inch on the interior and/or exterior surfaces of existing 800,000 Gallon Steel SWTP Clearwell as specified. Pits less than 1 sq. in. will be considered 1 sq. in. For Dollars Cents, per square inch $ $ 2. 5,000 S.F. Epoxy caulking pit filler for pits having a depth between 1/16- inch and 1/8-inch on the interior of existing 800,000 Gallon Steel SWTP Clearwell as specified. Caulked areas less than 1 sq. ft. will be considered 1 sq. ft. For Dollars Cents, per square foot $ $ L.F. Caulk seams or other gapped, lapped or skip-welded seams so that they are completely sealed as specified. For Dollars Cents, per linear foot $ $ BF - 6*

9 BID FORM 1999 MAY BID FORM D CONTRACT DEDUCTIVE ALTERNATE FOR SUBSTITUTION OF EXTERIOR COATING SYSTEMS ITEM NUMBER APPROXIMATE QUANTITY DESCRIPTION WITH UNIT BID PRICE WRITTEN IN WORDS UNIT PRICE TOTAL PRICE 1. Lump Sum Deduct for eliminating BASE BID Exterior Coating System (OSC-4) and substituting Deductive Alternate Exterior Coating System (OSC-6) For Dollars Cents, lump sum $ BF 8*