Addendum #1 Page 1

Water Treatment Facility

Breckenridge, MinnesotaUEI No. 16.01800

ADDENDUM NO. 1

Date Issued: July 28, 2017

Bid Date: August 7, 2017 – 11:00 a.m.

To All Plan Holders:

THE BIDDER SHALL ACKNOWLEDGE RECEIPT OF ALL ADDENDA IN THE BID. FAILURE TO DO SO MAY SUBJECT BIDDER TO DISQUALIFICATION. THIS ADDENDUM FORMS PART OF THE BIDDING SPECIFICATION AND MODIFIES IT AS FOLLOWS:

Project Manual:A. Section 00 26 00

Automatic Systems Company of Roseville, Minnesota (651-631-9005) has completed the necessary Request for Approval of Substitution and required documentation and is hereby approved to be included in the list of acceptable integrators in Section 33 82 63.16.

The manufacturers and products, which are listed in the following texts, are approved for bidding. Final acceptance is contingent upon receipt and approval of final shop drawings. Manufacturer shall conform to all warranties, performances, size, etc., as the item specified. The burden of proof of the merit of the proposed substitution is upon the proposer. Those items not specifically listed by addendum shall not be approved for bidding.

SECTION DESCRIPTION MANUFACTURER07 13 00 Waterproofing Membrane System W.R. Meadows, Inc (Mel-Rol)07 13 00 Accessory Drainage Panel W.R. Meadows, Inc (Mel-Drain)08 11 13 Steel Doors and Frames Mesker08 71 11 Exit Devices Dorma 9000 Series08 71 11 Door Closer Dorma M9000 Grade 1 Mortise08 71 11 Cylinder Locks Dorma C800 Grade 110 51 00 Lockers Art Metal Products22 10 06 Drains and Cleanouts Watts Drainage Products22 10 06 Emergency Fixture Tempering Valve Powers22 36 00 Water Heater State Ind.32 32 23 Straight Face Retaining Walls Amcon Concrete43 23 31 Vertical Centrifugal Pumps Goulds

B. Section 00 73 231. DELETE this section in its entirety.

C. Section 03 30 001. 3.6.E. CLARIFICATION. Concrete tanks that hold water (clearwell, lift station, recycle basin,

filters) shall be provided water tight. The intent is the contractor shall provide placement and curing techniques to ensure temperature control, proper curing, and crack control. In areas where minor cracks do develop, the intent is to utilize XYPEX slurry within the manufactures recommendation to seal all cracks. This includes re-excavation, crack widening, backing materials, re-disinfection, repeat testing etc to provide a leak proof system. Areas with honeycombing, excessive cracks, or no attempt to minimize cracks will be rejected and replaced at Contractor’s expense.

D. Section 03 45 00

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1. Part 2 Products, B. Precast Units, Item 2. REPLACE “#1972” with “#G16C2H3A” 2. Part 2 Products, J. Finish – Precast Units, Item 1. REPLACE “#1972” with “#G16C2H3A

E. Section 23 98 00 – HVAC InstrumentationADD new Item 2.04 as follows:

2.04 CONTROL VALVESAll control valves shall be furnished under this Section.1. Control valves: Valves shall be constructed with not less than 125 PSI water body and shall

be leak proof under a static head of 125 PSI. Gradual acting valves shall throttle the flow of water by means of V-port throttling type plugs. Valves shall be suitable for the temperature, pressure, and service specified. Valves shall provide 100 percent tight shut-off.a. Valves for water service shall be capable of shutting off against a 50 PSI

differential.b. Valve capacities shall be as scheduled and/or indicated on the Drawings.

2. Valves 2" and smaller: Screwed.a. Maximum allowable valve pressure drop at full flow is 5 PSIG.

3. Provide actuators for all control valves.

F. Section 23 98 50 – HVAC Sequences of Operations1. In Item 3.02.P, ADD new paragraph as follows:

A remote mounted “Emergency Boiler Shut-off Switch” shall be provided at each door to manually shut off all power to the boiler system. Switch shall be suitably labeled and located behind a protective clear cover.

G. Section 40 91 00

1. 2.3, F. CHANGE ASTM number from A126 to A-351. The butterfly disc material shall be stainless steel.

2. 2.4, B. Limit switches are not required on the pneumatic actuators. The valves/actuator combo shall be factory verified to fully open and close with the limits set at the factory. Any valves that fail to fully open or seat closed shall be replaced by the supplier.

3. 2.4, B. A question arose regarding the actuators mounting to the valves. The mounting kit

shall be supplied factory attached. The configuration to prevent conflicts with adjacent pipes and walls shall be field verified with the contractor prior to shipment. The materials shall be either factory powder coated or stainless steel to prevent on-site corrosion. No field painting will be allowed due to the difficulty in access to provide a complete coating system.

4. 2.4 B. 1. b. 2) ADD “or zinc plated ductile iron”.

5. 2.4 B. 1. b. 6) ADD “or glass reinforced nylon”.

6. 2.4 B. 1. e. DELETE entire sentence “include provisions for emergence manual operation” and replace with “The pneumatic actuators shall have solenoid valves with manual override features, which gives the owner the ability to manually open or close the valves with a pushbutton.

7. 2.4 C.1.m) ADD AUMA Model SQ/AC as an approved manufacturer.

8. 2.5 A.1. ADD Kennedy Valve Fig. 506-KM as an approved manufacturer.

9. 2.5 A.1. ADD Kennedy Valve Kenflex Series 506SS as an approved manufacturer

10. 2.5 C.1. ADD Kennedy Valve Fig. 506 as an approved manufacturer.

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11. 2.5 D.1. ADD Proco Style 720 as an approved manufacturer.

12. 2.7 A. ADD GA Industries Series 933 as an approved manufacturer.

13. 2.8 A. ADD GA Industries Series 920 as an approved manufacturer.

13. 2.8 C. DELETE “and to immediately open to allow air to enter the line and prevent a vacuum from developing”. The only air release valves aside from the Vertical Turbine Pump discharges are on the high service header. This valve shall not allow air to enter the water distribution system. There are no locations in the plant design that require vacuum protection. The filter effluent/clearwell influent pipe will discharge above the clearwell water surface.

H. Section 43 22 561. 2.1, I. ADD Chemineer Mixers to approved manufactures.

I. Section 43 23 311. 2.2, A, 1. ADD Goulds Water Technology to approved manufactures.2. 3.2. A. 8. ADD Field verify vibration limits established by ANSI/HI 9.6.4-2009 are met.

J. Section 46 33 831. 2.3. A. ADD Chemineer Mixer to approved manufactures.

K. Section 46 31 111. 2.1. A. ADD Wallace & Tiernan V10K with PCU controller.2. 2.1. D. ADD Powell E-Pro Emergency Shut off Valve.

L. Section 46 31 431. 2.1. A. ADD Wallace & Tiernan V10K with PCU controller.2. 2.1. D. ADD Powell E-Pro Emergency Shut off Valve.

M. Section 46 33 231. Part 2: The tank volumes shown on the drawings are minimum that should be supplied. The

diameters shown in the specification are maximums to ensure the tanks will fit within the spaces provided. The height of the tanks is not critical.

2. 2.3, A and B. CLARIFICATIONS. The “55 Gallon Neat Polymer Drum” shown on Drawing

Detail 2/D5.07 is a Flocculant chemical steel barrel supplied and left at the site. The “55 Gallon Neat Polymer Drum” shown on Drawing Detail 1/D5.07 should have stated a polymer TANK for the Coagulant. The tank will be on a scale with a minimum capacity of 55 gallons should the supplier bring a 55 gallon drum to pump into this tank.

3. 2.4, B. ADD. “4. The Fluoride tank shall be supplied as a double wall containment tank. No

exterior chemical containment shall be provided within the Fluoride Room due to space constraints.”

N. Section 46 33 451. 2.2. A. 1. ADD Pulsafeeder Pumps to approved manufactures.2. 2.2. B. 1. ADD Verder Pumps to approved manufactures.

O. Section 46 43 531. 1.2. B. 3. The rise rate of 1.2 gpm/ft2 should be 1.25 gpm/ft2.2. 1.2. B. 4. Change the detention time from 130 minutes to 90 minutes.3. 1.2. B. 5. Disregard the recirculation rate. Each manufacture has a different analysis for

optimum recirculation. The manufacture shall supply the unit to land the optimum recirculation rate within the average operation range of the VFD speed.

4. 1.2. C. 1. The manufacture shall be allowed to provide data of an effluent quality on an identical water source to verify or come within 10% of the specified effluent data on a laboratory tested bench scale test.

5. 2.1. A. 3. The sludge rake mechanism does not require a VFD. Utilize the specified system in

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Paragraph 2.1.C.1.6. 2.1. B. 3. Each manufacture utilizes a different drive mechanism and gear system. The

manufacture shall provide a drive mechanism that provides the intent and performance specified and warrantee items required.

7. 2.1. E. 1. The same applies to the drive shaft assembly. A cage, draft tube, or shaft drive are acceptable.

8. 2.1. E. 4. The floor slope shall be 8%. The fillet should be a minimum of 9.5” up the wall at the 10 foot distance from the center.

9. 2.1. G. The launders are intended to be peripheral attached to the walls. The manufacture can supply radial launders to control the upflow based upon unit performance.

10. 2.2. A. 10. Stainless steel does not require epoxy finishes.

P. Section 46 51 111. 2.2. B. 2&5. The manufactures standard doors and inspection hatches are acceptable provided

they allow complete access and inspection of the aerator interior.2. 2.1. C. 2. a. ADD “at a maximum loading rate of 25 gpm/ft. The unit should be a minimum of

6’-4” square.3. 2.2. C. 1. A distribution box shall be allowed in lieu of spray nozzles. Either system shall

supply a complete even distribution of water over the entire area of the aeration plates.

Q. Section 46 71 131. 1.4. B. 1. ADD Running Torque designed to run approximately 30,000 ft-lbs unless

manufacture provides test data otherwise. Manufacture to provide Torque overload stops at a values not to exceed to prevent equipment damage.

2. 2.1. F. 2. The rake lowering and raising mechanism shall automatically raise on over torque but lower on manual control switch. Automatic lowering of rake shall not be provided.

3. 2.1. G. 1. B. The stairway will be provided by the Manufacture. The height shall be verified with the Contractor from finished floor to height of the support beams. The distance will be dictated by normal stair dimensions and the bridge support height.

4. 2.1. G. 1 and 2. The Gravity Thickener grating and deck plate can match the requirements for the Solids Contact Basin for consistency. The walkway and deck plate around the drive units can be 3/16” plate.

5. 2.1. H. 2. 304 stainless steel is acceptable for the feedwell.6. 3.4. B and C. The Installation and Start-up Service Trips can be combined into 2 trips with 4

days onsite.

Plans:A. Plan Sheet D3.03.

1. CHANGE the air supply pipe size from 8-inch to 4-inch for Equipment Key items 7, 8, and 9.

B. Plan Sheet D3.04.1. CHANGE the CO2 solution piping in Notes 4, 5, and 6 from 4-inch to 2-inch. Note 7. The

manufacture shall install the water supply solenoid included in the equipment panel.

C. Plan Sheet S0.01. (Attached)1. ADD under the PRECAST PRESTRESSED CONCRETE NOTES: #13 – 24”Double Tee Roof

Panels (Contractor Options).

D. Plan Sheet S1.03. (Attached)1. CHANGE Key Note 5 from 6’-0” square to 4’ – 0” square. Move support beams to

accommodate smaller size. 2. CHANGE Clearwell exterior hatch dimensions to 4’-0”.

E. Plan Sheet S2.02A. (Attached)1. ADD detail 4/2.02A.

F. Plan Sheet A1.00.1. REMOVE the following note: “WATER WASHED FINISH WITHIN REVEAL”.

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G. Plan Sheets A1.11, A1.12, A2.02, A3.01, A3.02, A4.01, A4.02, and A4.03 1. REMOVE from the first paragraph the following: “(POLYISO TYPE)”.2. REPLACE paragraph three with the following: “SEE SPECIFICATION SECTION

‘ARCHITECTURAL PRECAST CONCRETE’ FOR PRECAST CONCRETE PANEL WALL FINISHES. EXTERIOR WALL PANEL FINISH SHALL BE EQUAL TO WELLS CONCRETE BLASTED FINISH #G16C2H3A WITH INTERIOR, FORM UP SMOOTH STEEL TROWEL FINISH.”

H. Plan Sheet A1.12 1. At detail 1/A1.12, hatch P0-3 REPLACE detail reference “3/A1.21” with “3/A1.12”

I. Plan Sheet A2.01 (Attached)1. REPLACE sheet A2.01 with sheet A2.01R.

J. Plan Sheets A2.01R, A2.02, A3.01, and A3.021. CHANGE the TOP OF CLEARWELL elevation from 102’-0” to 103’-0”

K. Plan Sheet A2.021. REPLACE keynote 034500.03 copy with “Water washed finish.”

L. Plan Sheet A4.031. At detail 2/A4.03 REPLACE detail reference “7/A5.01” with “15/A5.01”

M. Plan Sheet A5.011. At detail 5/A5.01 REPLACE the detail label “NOT USED” with “STAIR AND GUARDRAIL

DETAIL”.

N. Plan Sheet M7.111. In the Pump Schedule, revise the electrical voltage for heating pumps P-1 and P-2 to 208V-1P.

O. Plan Sheet E1.111. Add a receptacle for the electric hoist, which shall be wired to breaker AC2-34/36 as shown on

Plan Sheet No. E4.02. Coordinate receptacle type with hoist manufacturer’s submittal.

P. Plan Sheet E2.101. Add two size one FVNR starters to be used for heating pumps P-1 and P-2, which are 1-1/2

HP each. Include an H-O-A operator in each MCC bucket for these starters.

Q. Plan Sheet E4.021. Change Breakers 17/19 and 21/23 from Mechanical Pumps to spares.

R. Plan Sheet E6.011. Change Detail 4 to read as follows.

Pump #1HP 30 HPVoltage 460 VFLA 39.5 ANEMA Letter Code HService Factor 1.15

END OF ADDENDUM NO. 1

Respectfully Submitted,Brian L. Hiles, PEUlteig Engineers, Inc.

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