ITB-2019-0502_Addendum_No._4_7.24.19.pdf

City of Casselberry | Procurement Division 95 Triplet Lake Drive, Casselberry, Florida 32707

Phone: 407-262-7700, Ext. 1142 | procurement@casselberry.org

ITB-2019-0502 PW 1708 Howell Park Water Treatment Plan Rehab

Addendum No. 4

PUR-F-212 5/2019 1

DATE: July 24, 2019

TO: All Bidders/Proposers

FROM: Rhonda Ulmer

City of Casselberry Procurement Division

SUBJECT: ITB-2019-0502 PW 1708 Howell Park Water Treatment Plant Rehab

This addendum is issued to provide additional information, clarification, corrections, additions, deletions and/or answers to questions concerning the above referenced solicitation. All information provided in this addendum is incorporated into the solicitation document as set forth therein. All other terms and conditions of the solicitation have been maintained as originally distributed. This addendum supersedes any verbal and/or other instructions given to any bidder pursuant to the requirements set forth in the solicitation document.

I. DUE DATE

This Addendum does not change the solicitation due date. As such, the solicitation response is due no later than Tuesday, August 6, 2019 at 2:00 p.m. Local Time.

II. QUESTIONS AND ANSWERS (Q&A)

The City has received the following question(s) concerning the solicitation:

Q1: Specification Section 11800 – Polyethylene Storage Tanks, Part 1. General: Please confirm the tank shall be 1.9 Specific Gravity and 102 inches diameter by 103 inches tall for the 2000 gallon capacity double wall storage tanks as shown in the drawings.

A1: Yes this is correct.

Q2: Specification Section 11800 – Polyethylene Storage Tanks, Part 1. General: Are the two (2) 2000

Gallon Tanks Sodium Hypochlorite?

A2: Yes this is correct.

Q3: Specification Section 11800 – Polyethylene Storage Tanks, Part 1. General: How many 55 Gallon

Ortho Tanks are required? Are ortho-polyphosphate tanks to be dual containment tanks? If Dual containment minimum size available is 35 gallons or 60 gallons, please advise if applicable.

A3: This section does not include any ortho-polyphosphate tanks. The City will be provided these tanks.

Q4: Specification Section 11800 – Polyethylene Storage Tanks, 2.06 Page 3. – Snyder uses integrally molded top Tie Down Lugs with 316 stainless steel cables and galvanized floor anchored shoes to protect and secure tanks. The PE stamped calculations required in 1.01 F., are performed around this design. Please confirm this is applicable.

A4: Yes this is applicable.

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Q5: Specification Section 11800 – Polyethylene Storage Tanks, 2.10 Snyder does not offer a gasket on the manway fitting. If a seal is required the specification would require “a bolted sealed manway” with poly bolts, nuts and seal. Please advise if standard manway or bolted sealed is required?

A5: Standard manway is required.

Q6: Is a 2-inch PVC and Viton gasket bulk head fitting, for over flow, to be supplied in the cap section of the primary tank? If so where should it be located?

A6: There are no specified over flow details shown.

Q7: Is the tank to be hydrostatically tested at the factory?

A7: Yes.

Q8: Are the tanks to be NSF 61 certified?

A8: Yes, the tanks must be NSF 61 certified.

Q9: 2.08. D. Page 4. And Drawing C-11 – The minimum size connection for the drain/suction size is

2 inches if a flexible tube sight glass is installed. Please confirm if this is acceptable?

A9: Yes this is acceptable.

Q10: 2.08. D. Page 4. And Drawing C-11 – The feed line drain/suction lines is specified a double bolted flange fitting. Please confirm this connection shall be a 2-inch Unified Fitting Outlet with transition and PVC double flanged fitting with PVC encapsulated titanium Bolts with Viton gaskets?

A10: Yes this is an acceptable means of connection.

Q11: 2.12 A. B. Should a shut off valve be installed before the sight glass Tee in the lower drain/suction?

A11: Yes, a shut off valve must be installed.

Q12: Please confirm a 4-inch PVC flanged bulk head fitting shall be provided for level indicator as shown on Drawing C-11?

A12: Yes.

Q13: Please confirm the vent line for shall be a 4-inch PVC flanged bulk head fitting with Viton gasket as shown on the Drawing C-11.

A13: Yes.

Q14: Please confirm the metering pump vent return is plumbed into a ½ inch PVC bulk head fitting with

Viton gasket as shown on Drawing C-11.

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A14: Yes.

Q15: Should a Lutz Jesco Drum Pump Model B55T-5 for 25 GPM and 20 volt 1 phase power be added to the tank specification, to be turned over to the City for emergency transference of chemical?

A15: No this should not be added.

Q16: Specification Section 11353, High Service Pumps and Drives, RFI, 2.01 A. Acceptable

Manufacturers: Will the City allow Patterson to be a named supplier offering the following and attachments regarding the technical specifications?

Patterson Pump Company:

Has both pump repair services and technical field services available in Tampa.

Has three certified individuals for field services in Dunedin Florida.

Have municipal water plant installations with this size pump throughout the State of

Florida.

Has the closest manufacturing facilities that makes this size pump that is located in

Toccoa, GA.

Meets the technical, mechanical and hydraulic requirements of these specifications.

A16: No the high service pumps must be either Fairbanks-Morse, Goulds, or Crane Deming as listed in Section 11353 2.01.

Q17: Please confirm the following minimum quality requirement, pump manufacture to have current

ISO 9001: 2008 and NSF 61/NSF 372 certification?

A17: The pumps have to be NSF 61/NSF 372 certified however the manufacturer does not.

Q18: Section 2.05 and 4.03 – Should pump manufacturer services include two (2) separate visits to:

Dial indicate the pump and motor shaft to factory T.I.R. prior to grouting only using stainless steel shims?

Laser align pump and motor shaft after grout cure to factory tolerance only using stainless steel shims?

A18: Yes two separate site visits are required.

Q19: Section 3.01 D. Is a 50 Birnell difference between case and impeller wear rings acceptable?

A19: Pumps shall be in accordance with specifications provided.

Q20: Section 3.01 E. Are both threaded shaft sleeves and threaded sleeve nuts acceptable for shaft sleeve protection specified?

Comment: Shaft sleeve nuts allow maintaining pump sleeve removal more efficiently than threaded sleeves. Not all named manufacturers may have threaded sleeves.

A20: Pumps shall be in accordance with specifications provided.

PUR-F-212 5/2019 4

Q21: Section 3.01 E. Bearing lock nuts are not necessary when bearing is isolated in a pinned bearing cap and house. Lock nut may be specific to a single manufacturer? In good practice the rotating element will need to be removed from casing to property dynamic balance and replace bearings.

Is this applicable?

A21: Pumps shall be in accordance with specifications provided.

Q22: Section 3.01 E. Should the minimum bearing B10 hours (at shut off head) be specified to read;

inner bearing 200,000 HRS and Outer bearing 350,000 HRS?

A22: Minimum bearing shall be in accordance with manufacturer requirements.

Q23: Section 3.02 Are these pumps inverter duty? If so should the motor be provided with bearing isolators to protect against stray current generated by the inverters?

A23: Yes the pumps are inverter duty. Motors shall be protected in accordance with electrical specifications in this project.

Q24: Section 3.02 Are the motors required to be meggered, uncoupled from VFD, prior to start?

A24: Yes.

Q25: Section 3.02 do the motors require short commercial test?

A25: No.

Q26: The specification calls for packing and mechanical seals. Please confirm mechanical seals to be provided. If mechanical seals and NSF-61 is required, the specified type 21 seal is may not be NSF approved? Is a similar design seal meeting the charter of the NSF 61 certification in the pump acceptable?

Comment: Standing alone this type of seal, as we are aware, does not have NSF 61 certification.

A26: Mechanical seals are required. All materials to be used within the pump should be NSF certified for potable water use.

Q27: Section 4.02 Please confirm if the average, to obtain wire to water efficiency, is between the pump and motor operated at design capacity? If wire to water efficiency includes a VFD, please advise testing parameters for both pump and VFD manufacturers.

A27: Yes. Pump testing will include operating each pump one at a time and manually adjusting the speed for each pump (one at a time) via the respective speed control starting at 100% and dropping down incrementally until shutoff is demonstrated and then back up in 10% increments in order to demonstrate flow range capability.

Q28: Please confirm the efficiency stated in pump conditions is for the pump at the design conditions.

A28: Yes.

Q29: The VFD Section 16370 specifies Danfoss only, the pump specification specifies acceptable manufacturer Fair Banks Morse. Both these companies have worked directly, in the past, through

PUR-F-212 5/2019 5

a single agent. Will this restrict competitive bids for pumps and VFD’s? Will the city recognize an additional VFD supplier, such as, Yaskawa, Square D. Allen Bradley, or Eaton Cutler Hammer in order to offer competitive bid for pumps and VFD’s? If not will the City consider purchasing VFD direct to allow for competitive bid on the pump system?

A29: The VFD must be Danfoss as the City is standardizing VFDs. However, the high service pumps can be any one of the three listed in Section 11353.

Q30: Can the Contractor gain access to the plant off of Hibiscus Road to avoid the Semoran Boulevard traffic? Can a temporary gate be installed prior to the wall installation?

A30: At this time this is not acceptable. Site security must be maintained throughout the course of the project.

III. CHANGES, ADDITIONS AND/OR CLARIFICATIONS

N/A

CLARIFICATIONS:

N/A

CHANGE NO. 1: QUESTIONS

IV. SIGN-IN SHEET

V. ATTACHMENTS

PUR-F-212 5/2019 6

Respondents must acknowledge receipt of this Addendum by signing this form below and returning it to the Procurement Division prior to the hour and date specified for receipt of bids/proposals or by including this Addendum with your submittal. Failure to comply may result in disqualification of your response.

Acknowledgment is hereby made of Addendum.

Name of Firm/Company Contact Email

Street Address City, State, Zip Code

Telephone Number Fax Number

Authorized Person Printed Name Authorized Person Title

Authorized Person Signature Date of Signature