AC Chiller Repair and Maintenance Services SFB Addendum 2

FIRST ADDENDUM TO THE SFB FOR
AC CHILLER REPAIR AND MAINTENANCE SERVICES
AT ST. LOUIS LAMBERT INTERNATIONAL AIRPORT
June 8, 2026
Dear Prospective Bidders:
Attached is the First Addendum to the Solicitation For Bids (SFB) for AC Chiller Repair and
Maintenance Services at St. Louis Lambert International Airport dated May 13, 2026. This First
Addendum is being issued to do the following:
1. To respond to Bidder's questions.
2. To delete Appendix A, Section 5.I and replace it with the following Appendix A,
Section 5.I.
"I. Annual Plate Heat Exchanger Cleaning. Successful Bidder will conduct an annual
inspection and mechanically clean exchanger in accordance with the
manufacturer's requirements once every 12 months, typically during the summer
months.
1. The manufacturer of the heat exchanger (free cooler) at the East Power
Plant is ITT Bell & Gossett GPX Heat Exchanger, Model 50628, and the
manufacturer of the heat exchanger (free cooler) at the West Power Plant
is Alfa Laval Thermal Inc., Model M30-FG.
2. Successful Bidder will determine levels of heat exchange tube fouling
from analysis of available log reading and readings taken during
inspection of the Equipment.
3. Successful Bidder will submit to the Airport Representative, in a form
acceptable to the Airport Representative, documentation of annual plate
heat exchanger cleaning. Documentation must be submitted no later
than four (4) weeks after completion of cleaning.

4. Annual Plate Heat Exchanger Cleaning must take place no less than 10
months and no more than 14 months apart from the previous Annual
Plate Heat Exchanger Cleaning."
The City of St. Louis Airport Authority ("Authority") reserves the right to reject any and all
Bids, to advertise for new Bids, to cancel this SFB, and/or proceed to have the services
performed otherwise. The submission of a bid by a bidder shall not in any way commit the City
of St. Louis or the Authority to enter into an Agreement with that Bidder or any other Bidder.
All other terms, conditions, and provisions of the SFB not inconsistent with this First Addendum
are unchanged and remain in full force and effect.
For those individuals needing accommodations or alternative formats as required under the
Americans with Disabilities Act. Please call (314) 426-8094 with questions regarding these
matters. To request language assistance please call (314) 426-8094. Please contact STL three
business days in advance to process your request.
Sincerely,
Delia Cummings, Contract Supervisor

AC Chiller Repair and Maintenance Services
Pre-Bid Questions and Answers
Q1. What cleaning method should be used to perform the annual plate heat exchanger cleaning
(Appendix A, Section 5.I)?
A1. The plate heat exchangers shall be cleaned mechanically.
Q2. How do I obtain a copy of the current A/C Chiller Repair and Maintenance Services
Agreement?
A2. To receive a copy of the current Agreement, please send an email request to Gin
Nelson/Contracts Compliance Officer (gmnelson@flystl.com).