County of Loudoun, Virginia
REQUEST FOR PROPOSAL
ENGINEERING SERVICES FOR THE
STORMWATER MANAGEMENT PROGRAM
ACCEPTANCE DATE: Prior to 4:00 p.m., December 9, 2025 “Local Time”
RFP NUMBER:
RFQ 683950
ACCEPTANCE PLACE:
Department of Finance and Procurement
Division of Procurement
1 Harrison Street, SE, 1st Floor,
Procurement Bids and Proposals Drop Box
Leesburg, Virginia 20175
PLEASE NOTE:
A. Please contact the Contracting Officer designated on the front cover of the
solicitation with any questions regarding this process. Offerors are strongly
encouraged to check the County’s website routinely for updates.
B. Documents related to this solicitation may be downloaded from the County’s
website at https://www.loudoun.gov/bids.aspx.
Requests for information related to this Request for Proposal should be directed to:
Beth A. Cioni
Contracting Officer
(571) 627-7414
Beth.Cioni@loudoun.gov
Issue Date: November 5, 2025
IF YOU NEED ANY REASONABLE ACCOMMODATION FOR ANY TYPE OF DISABILITY
IN ORDER TO PARTICIPATE IN THIS PROCUREMENT, PLEASE CONTACT THIS
DIVISION AS SOON AS POSSIBLE.
RFP RFQ 683950
Engineering Services for the Stormwater Management Program
Page 1 of 48
REQUEST FOR PROPOSAL
ENGINEERING SERVICES FOR THE
STORMWATER MANAGEMENT PROGRAM
SECTION/TITLE
PAGE
1.0 PURPOSE ............................................................................................................ 3
2.0 COMPETITION INTENDED ................................................................................. 3
3.0 BACKGROUND INFORMATION ......................................................................... 3
4.0 (INTENTIONALLY OMITTED) ............................................................................. 4
5.0 SCOPE OF SERVICES ........................................................................................ 4
6.0 EVALUATION OF PROPOSALS & SELECTION PROCEDURES.................... 12
7.0 INSTRUCTIONS TO OFFERORS ...................................................................... 20
8.0 TERMS AND CONDITIONS ............................................................................... 26
9.0 PROPOSAL SUBMISSION FORM .................................................................... 45
Prepared By: s/Beth A. Cioni
Contracting Officer
Date: November 5, 2025
RFP RFQ 683950
Engineering Services for the Stormwater Management Program
Page 2 of 48
ENGINEERING SERVICES FOR THE
STORMWATER MANAGEMENT PROGRAM
1.0 PURPOSE
The intent of this Request for Proposal (RFP) is for the County of Loudoun, Virginia
(County) to obtain the services of qualified engineering firms to establish one (1) or
more fixed-fee, open-ended contracts for Professional Engineering Services in
support of the County’s Stormwater Management Program. Services will be provided
on an “as needed” basis for a one (1) year period with up to three (3) additional one
(1)-year renewal options.
The number of contracts awarded will depend on the number and quality of the
proposals received, with a maximum of five (5) contracts. A County issued Purchase
Order (PO) will precede the start of work for each individual task.
Firms must demonstrate strong project management capabilities and technical
competence in supporting stormwater programs that meet the Virginia Pollutant
Discharge Elimination System (VPDES) Phase II Municipal Separate Storm Sewer
System (MS4) General Permit requirements. Experience in the development, design,
and implementation of Best Management Practices (BMPs) is essential.
2.0 COMPETITION INTENDED
It is the County’s intent that this RFP permits competition. It shall be the Offeror’s (i.e.
any entity submitting a proposal in response to this RFP) responsibility to advise the
Purchasing Agent in writing if any language, requirement, specification, etc., or any
combination thereof, inadvertently restricts or limits the requirements stated in this
RFP to a single source. The Purchasing Agent must receive such notification not later
than fifteen (15) days prior to the date set for acceptance of proposals.
3.0 BACKGROUND INFORMATION
Loudoun County’s Stormwater Management Program oversees the planning, design,
maintenance, and regulatory compliance of the County-wide stormwater system. The
program is designed to manage both the quantity and quality of stormwater runoff,
with a particular focus on minimizing pollutants entering local waterways through
adherence to applicable state and federal regulations.
The County is subject to the National Pollutant Discharge Elimination System
(NPDES) Phase II Municipal Separate Storm Sewer System (MS4) Permit,
administered by the Virginia Department of Environmental Quality (DEQ). Under the
federal Clean Water Act—specifically 40 CFR §122.26—urbanized counties with
populations exceeding 50,000 are required to develop stormwater management
plans and secure discharge permits for stormwater outfalls. Currently, the eastern
unincorporated portion of Loudoun County, covering approximately 32.6 square
miles, falls within this regulatory framework. As population growth continues,
additional areas are expected to be included under Phase II regulation.
At the state level, Virginia’s DEQ issues Virginia Pollutant Discharge Elimination
System (VPDES) permits to local governments in accordance with federal and state
RFP RFQ 683950
Engineering Services for the Stormwater Management Program
Page 3 of 48
law. To comply with the Virginia Stormwater Management Act and the VPDES Phase
II MS4 General Permit, Loudoun County has adopted local ordinances and
implemented a comprehensive Stormwater Management Program that supports both
flood control and water quality protection.
The County’s program includes measures and procedures aligned with the six (6)
Minimum Control Measures (MCMs) required under the MS4 permit. Best
Management Practices (BMPs) have been developed for each MCM to guide
implementation:
• Public Education and Outreach
• Public Involvement and Participation
• Illicit Discharge Detection and Elimination
• Construction Site Runoff Control
• Post-Construction Runoff Management
• Pollution Prevention/Good Housekeeping
4.0 OFFEROR’S MINIMUM QUALIFICATIONS
Intentionally Omitted.
5.0 SCOPE OF SERVICES
All proposals must be made on the basis of, and must meet or exceed, the
requirements contained herein.
5.1 General Requirements
A. A purchase order must be issued for each task prior to the start of work.
The purchase order will constitute the notice to proceed unless
otherwise indicated.
B. Individual tasks may require the Consultant to provide the supervision,
manpower, materials, equipment, and supplies necessary to complete
the services outlined below.
C. All individuals performing work under this Contract must possess
appropriate licenses, certifications, or credentials relevant to the tasks
being performed.
D. All services shall be performed in compliance with industry standards
and all applicable federal, state, and local laws, ordinances, and
regulations, including but not limited to: Virginia State Health
Department requirements; the Virginia Uniform Statewide Building
Code (USBC); Virginia Occupational Safety and Health (VOSH)
Program and Occupational Safety and Health Administration (OSHA)
rules and regulations; and Virginia Department of Environmental
Quality (DEQ) standards.
RFP RFQ 683950
Engineering Services for the Stormwater Management Program
Page 4 of 48
E. Services under this Contract shall include, but are not limited to:
a. Evaluations, investigations, analyses, recommendations, cost
and time estimates, testing, reports, studies, designs,
preparation of documents (including drawings in latest
AutoCAD® (Computer-Aided Design) version and
specifications), and field inspections.
b. Professional involvement throughout all phases of a project,
including but not limited to: development of programs;
preparation of reports; periodic progress reports and meetings;
preparation for and participation in briefings and presentations to
staff groups, citizen groups, the County Board of Supervisors,
and federal or state agencies; timely processing of invoices for
services; and timely processing of project correspondence.
c. Coordination with County staff, other County contractors, and
related professional or non-professional services, as may be
directed by the County.
5.2 Fee/Rate Schedule
Hourly rates established under this Contract shall include:
A. Administrative items such as voice, data and video services; mailing
and printing services; courier services; and materials required for the
preparation of presentations, reports, submittals, and other expenses
typically incurred in the conduct of business.
B. Transportation to and from job sites; vehicles, fuel, and vehicle
maintenance; cell phones; personal computers; printers; cameras and
video equipment; software; general office supplies; home office and
administrative support; and all overhead and incidental costs.
5.3 Performance of the Consultant
During the term of the Contract, the County will review the Consultant’s
operations to determine compliance with contractual requirements. The
Consultant shall cooperate with and assist County representatives in
conducting these reviews. If deficiencies are identified, the Consultant shall
implement remedial action immediately. All County recommendations and
Consultant responses or actions shall be properly documented by the
Consultant.
No additional compensation shall be provided for remedial actions taken by
the Consultant to correct deficiencies identified by the County. Remedial
actions and required response times may include, but are not limited to, the
following:
A. Further subdividing assigned personnel responsibilities, reassigning
personnel, or assigning additional personnel.
B. Immediately replacing personnel whose performance has been
determined by the Consultant and/or the County to be inadequate.
RFP RFQ 683950
Engineering Services for the Stormwater Management Program
Page 5 of 48
This page summarizes the opportunity, including an overview and a preview of the attached documents.