IFB_252615_Addendum_6.pdf

City of Sanford | Finance Department | Purchasing Division 300 N. Park Avenue Suite 236, Sanford, Florida 32771

Phone: 407-688-5028 or 5030 | Fax: 407-688-5021 | Email: purchasing@sanfordfl.gov ADDENDUM #6 IFB 25/26-15 Transfer Station and Reclaimed Water

Distribution Pump Station At the S.N.W Reclamation Facility

DATE: August 18, 2026

TO: All Bidders/Proposers

FROM: Marisol Ordonez, Purchasing Manager

City of Sanford Purchasing Division

SUBJECT: IFB 25/26-15 Transfer Station and Reclaimed Water Distribution Pump Station

At the Sanford North Water Reclamation Facility | ADDENDUM #6

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 parts of the solicitation have been maintained as originally distributed. This addendum supersedes any verbal and/or other instructions given to any bidder/proposer qualified to respond pursuant to the requirements set forth in the solicitation document.

This Addendum consists of a total of 4 pages plus the following attached items:

A. Acknowledgement of Receipt of Addendum No. 6 Form – Total of 1 Page B. Revised Specifications:

00410 C. Revised Contract Drawings:

C-5

I. DUE DATE

This Addendum does change the solicitation due date. As such, the solicitation response is due no later than Thursday, August 27, 2026 at 2:00PM Local Time.

II. QUESTIONS AND ANSWERS (Q&A)

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

Q1. Please see sheet C4 of the plans. Is the proposed concrete curb and #57 Stone shown supposed to be included in bid item 4.13 and be considered "Pump Station Repairs"? Without a measurement and payment section it isn`t clear what is meant by "Pump Station Repairs".

A1. Bid item 4.13 includes all concrete repairs due to damage and/or removal during installation of new electrical system/conduit at each pump station along with installation of new ribbon curb and #57 stone. Bid form updated.

Q2. Please define bid item 4.7 "Dewatering".

A2. The contractor is required to provide dewatering system of sufficient size and capacity to prevent ground and surface water flow into any excavation and to allow all Work to be mailto:purchasing@sanfordfl.gov

Phone: 407-688-5028 or 5030 | Fax: 407-688-5021 | Email: purchasing@sanfordfl.gov ADDENDUM #6 IFB 25/26-15 Transfer Station and Reclaimed Water

Distribution Pump Station At the S.N.W Reclamation Facility installed in a dry condition. See section 02240.

Q3. For grading purposes, it doesn`t look like any of the existing contour lines on the plans have elevations called out. What are the existing grades compared to the new grades?

A3. See revised sheet C5 for the grading plan with existing elevations called out.

Q4. Given the statement and communication that Sanford has advised that we do not have a pre-approved list for System Control Suppliers (SCS) and Control System Engineers (CSE). Please confirm that GrayMatter will be considered acceptable.

A4. See addendum #3, Answer #6

Q5. OIT specifications have not been provided. An OIT is indicated as required for the panel. If correct, please provide a specification for the OIT.

A5. See spec insert provided below.

Q6. We need existing enclosure dimensions for PCP-N2 & PCP-N3 since the panel contents will be modified.

A6. Dimensions will be confirmed after bid. Assume each panel is 60”W x 72”H x 12”D.

Q7. We need to provide two Modicon Redundancy Switches (NIP-S) with Min. 5 copper ports and

Min. 5 Fiber ports(SFP Compatible). No Modicon redundancy switch fulfils this requirement.

Please provide an alternative manufacturer or alternative requirement for the ethernet switch.

A7. Provide a Modicon network with the port configuration specified. A larger switch may be used.

Q8. Please provide required the Pressure measurement range for the Submersible Level Transmitters to be provided on this project.

A8. Tank levels 0-50 feet. Pressure range 0-100 PSI.

Q9. Instrumentation Drawing No. I-03 shows a SSS panel. Kindly confirm whether this is a control panel. If yes, please provide details on what is required inside this panel.

A9. SSS is Solid Stat Starter per I-01 Electrical Notes, Symbols & Abbreviations.

Q10. Spec section 13310-2.01-C specifies a Square D surge suppressor for the 4-20 mA signal line, but that surge suppressor does not appear to be available for 4-20 mA signals. Would Phoenix contact surge suppressor be acceptable?

A10. Phoenix contact surge suppressor meeting specification requirements is acceptable.

Q11. Will the City to accept RMC aluminum conduit above the transition point instead of PVC-coated

RMC. We would provide Crouse-Hinds EY seals and use A4 Chico compound for the seals.

A11. Aluminum conduit will be accepted above grade/above the transition point.

Q12. Please confirm if there is any temporary bypass pumping or temporary generators required for this project in order to do the power swap over.

A12. Not required.

Phone: 407-688-5028 or 5030 | Fax: 407-688-5021 | Email: purchasing@sanfordfl.gov ADDENDUM #6 IFB 25/26-15 Transfer Station and Reclaimed Water

Distribution Pump Station

Q13. Please confirm that the handrail at the gravity wall must also conform to FDOT standards. This could be a significant cost increase if so.

A13. Reference FDOT index 515-070 for 3’-6” height pipe guiderail (aluminum) for typical gravity wall installation.

III. CHANGES, ADDITIONS AND/OR CLARIFICATIONS

1. Q & A due date has been extended to Friday, August 21, 2026 at 2:00PM Local Time.

2. Specification 00410, “Proposal (Bid Form)”, Remove and replace with attached Revision Section

00410.

3. Insert the following into specification section 13300, 1.01, D:

27. Operations Building Existing Server Room:

a. Provide Operations Network Interface Panel rack (NIP-OPS). NIP-OPS shall contain rack mounted UPS powered two (2) mixed media ethernet switches and other subsystem components and network equipment.

4. Delete the following from Spec section 13301, 1.01, E, 1:

“Ensure NIP-N, NIP-S, the new HMI system, and new fiber network have been put in place.”

Insert the following in its place:

“Ensure NIP-N, NIP-S, NIP-OPS, new HMI system, and new fiber network have been put in place.”

5. Insert the following into spec section 13325, 2.02:

“E. Operator Interface Terminal. (OIT). The OIT shall be a front panel mounted PC. It shall be connected to its associated PLC and combatable with its hardware, software and communication protocol. It shall be compatible with the plant HMI system. It shall provide operator interface for monitoring and controlling all equipment connected to the associated PLC. It shall meet the following requirements:

1. 15 inch, full color resistive touch screen graphical display.

2. Ethernet and serial communications ports.

3. Modbus TCP communication.

4. Schneider Harmony ST6 series”

6. Revise specification section 13326, 3.05, C, 1 to read:

“Establish an automatic LEAD / LAG-1 / LAG-2 / LAG-3 / STANDBY assignment that rotates daily at an operator adjustable time. Operators can manually assign LEAD, LAG-1, LAG-2, LAG-3, and STANDBY pumps, overriding the automatic assignments. If any pump is not controllable (i.e H/O/A is OFF, pump is failed), omit it from the sequence.”

7. Revise specification section 13326, 3.05, C, 2 to read:

a. PSH – High Discharge Pressure

Phone: 407-688-5028 or 5030 | Fax: 407-688-5021 | Email: purchasing@sanfordfl.gov ADDENDUM #6 IFB 25/26-15 Transfer Station and Reclaimed Water

Distribution Pump Station At the S.N.W Reclamation Facility

b. PS – Target Discharge Pressure Setpoint

c. PSL – Low Discharge Pressure

d. PS-DB – Target Discharge Pressure Setpoint Deadband

e. ADJ-DLY – PID Adjustment Delay (0-60 secs)

f. LSL – GST Low Level

g. LSLR – GST Low Level Restore

h. MIN – Minimum Pump Speed.

i. MAX – Maximum Pump Speed.

j. STG-DLY – Pump Stage Delay (0-120 secs)

k. DPS – Default Pump Speed PID Output (85% Default)

8. Revise specification section 13326, 3.05, C, 4 to read:

If the pressure falls below PS-DB for an operator adjustable time ADJ-DLY, restart the PID until the pressure BEGINS increasing (Slope positive) then disable the PID again.

9. Revise specification section 13326, 3.05 C, 5 to read:

If the pressure rises above PS-DB for an operator adjustable time ADJ-DLY, restart the PID until the pressure BEGINS decreasing (slope negative), then disable the PID again.

10. Revise specification section 13326, 3.05 C, 6 to read:

If the pump speed rises to an operator adjustable MAX for the operator adjustable time STG-DLY, go to the next pumping stage.

11. Revise specification section 13326, 3.05, C, 7 to read:

If the speed falls to an operator adjustable MIN for the operator adjustable time STG-DLY, reduce the pumping stage by stopping the longest running pump and placing it at the end of the pump rotation sequence.

12. Revise specification section 13326, 3.05, C, 8 to read:

When starting an additional pump, disable automatic control and insert the operator adjustable PID output speed DPS. When the starting and running pumps reach the speed, enable the PID until the pressure reaches PS, then suspend the PID and keep pumps running at it’s current pressure.

13. Delete the following Contract Drawing:

14. Insert the following Revised Contract Drawing in its place:

IV. SIGN-IN SHEET

NA

Phone: 407-688-5028 or 5030 | Fax: 407-688-5021 | Email: purchasing@sanfordfl.gov ADDENDUM #6 IFB 25/26-15 Transfer Station and Reclaimed Water

Distribution Pump Station

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 #6 to IFB 25/26-15 Transfer Station and Reclaimed Water Distribution Pump Station at the Sanford North Water Reclamation Facility

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