15-Addendum 2.pdf

Department of Procurement & Material Management

12000 Government Center Parkway, Suite 427

Fairfax, VA 22035-0013

Website: www.fairfaxcounty.gov/procurement

Phone (703) 324-3201, TTY: 711, Fax: (703) 324-3681

DATE: September 23, 2025

ADDENDUM NO. 2

TO: ALL PROSPECTIVE OFFERORS

REFERENCE: RFP 2000004161

TITLE: Stormwater Management, Maintenance and Reporting

DUE DATE/TIME: October 17, 2025 @ 11:00 A.M. (Revised)

The referenced Request for Proposal is amended as follows:

1. The Due Date has been extended to October 17, 2025 @ 11:00 A.M.

2. Refer to Attachment 1 for answers to questions received.

All other terms and conditions remain the same.

Cynthia Parker, VCA Contract Specialist II

THIS ADDENDUM IS ACKNOWLEDGED AND IS CONSIDERED A PART OF THE SUBJECT

REQUEST FOR PROPOSAL:

Name of Firm

(Signature) (Date)

A SIGNED COPY OF THIS ADDENDUM SHOULD ACCOMPANY THE PROPOSAL BY WAY

OF UPLOAD TO FAIRFAX COUNTY’S PROCUREMENT PORTAL AT

HTTPS://FAIRFAXCOUNTY.BONFIREHUB.COM.

NOTE: SIGNATURE ON THIS ADDENDUM DOES NOT SUBSTITUTE FOR YOUR

SIGNATURE ON THE ORIGINAL RFP DOCUMENT. THE ORIGINAL PROPOSAL DOCUMENT

MUST BE SIGNED.

A D D E N D U M

C o u n t y o f F a i r f a x , V i r g i n i a http://www.fairfaxcounty.gov/procurement https://fairfaxcounty.bonfirehub.com/

RFP 2000004161

Addendum No. 2

ATTACHMENT 1

Q1. #3-13-Furnish and Install Galvanized Low-Flow BMP Plate/Debris Cage. What is the maximum size (LxWxH) of the BMP plate/debris cage?

A1. Assume trash rack no larger than 18” x 18” x 18” and plate no larger than 18” x 18.”

Anything larger should be priced at cost for the rack and plate, plus labor and materials for installation.

Q2. #3-16 and 17 – Complete Bilco Door with Frame and Hinges (Traffic and Non-Traffic

Bearing). What is the maximum size of the Bilco Doors?

A2. 4’ x 4’ access hatch (doors). Anything larger should be priced at cost for the door system, plus labor and materials for installation.

Q3. #3-25 – Concrete Modular Systems – Cleaning. What is the maximum depth of debris to be removed?

A3. Assume one day of vactor/crew and up to two loads of material removed per day.

Additional effort should be prorated accordingly.

Q4. #3-26 – Underground Detention Systems – Maintenance and Cleaning. What is the maximum depth of debris to be removed?

A4. Assume one day of vactor/crew and up to two loads of material removed per day.

Additional effort should be prorated accordingly.

Q5. #3-27 – ADS StormTech Isolator Row – Cleaning. What is the maximum depth of debris to be removed?

A5. Assume one day of vactor/crew and up to two loads of material removed per day.

Additional effort should be prorated accordingly.

Q6. #3-28 – CONTECH Stormfilter – Cleaning without Cartridge Replacement. What is the maximum depth of debris to be removed?

A6. Assume one day of vactor/crew and up to two loads of material removed per day.

Additional effort should be prorated accordingly.

Q7. #3-42 – ADS BayFilter – Cleaning without Cartridge Replacement. What is the maximum depth of debris to be removed?

A7. Assume one day of vactor/crew and up to two loads of material removed per day.

Additional effort should be prorated accordingly.

Q8. #3-54 – Sand Filter – Cleaning. What is the maximum depth of debris to be removed?

A8. Assume one day of vactor/crew and up to two loads of material removed per day.

Additional effort should be prorated accordingly.

Q9. CONTECH StormFilter – Replace Gate Valves on Underdrain Pipes. Is this supposed to be a gate valve to dewater a sand filter? What is the maximum diameter pipe for the gate valve?

A9. Assume no larger than 6 to 8” underdrain pipe with a dewatering gate valve on any Stormfilter or equivalent underground detention and filtering practice, including sand filters.

RFP 2000004161

Addendum No. 2

ATTACHMENT 1

Q10. #5-8 – CCTV Inspection per LF. The pricing unit is listed as HR. Are you looking for an LF or HR rate?

A10. The pricing unit for CCTV Inspection should be LF. The Price Schedule has been revised.

Q11. The Task Area pricing sheets column one “Not Bidding.” Does this mean you do not have to provide pricing for every line item listed in the task area?

A11. You should submit pricing for all line items for a task. However, you do not need to submit pricing for all tasks. Offerors should download the revised BidTables in Bonfire to submit offers properly.

Q12. #3-13 – Parge Existing Pipes/Drainage Structures Using Non-Shrink Grout. The unit of measure shows CY. Is CY correct or should it be SY?

A12. We elected to go with a smaller volume unit of measure for parging given the likelihood of applying less than a CY for most parging jobs for Task Area 3. This is specific to TA 3 only. Parge Existing Pipes/Drainage Structures Using Non-Shrink Group is listed as #3-12. This line-item has been revised on the Price Schedule and Attachment E to CF UOM.