Balefill In-Situ Enhanced Bioremediation, Project No. 25-024

Location:	Wyoming
Posted:	Mar 5, 2026
Due:	Apr 17, 2026
Agency:	City of Casper
Type of Government:	State & Local
Category:	X - Lease or Rental of Facilities
Publication URL:	To access bid details, please log in.

Attachment Preview

REQUEST FOR PROPOSALS

FOR

BALEFILL IN-SITU ENHANCED BIOREMEDIATION

PROJECT NO. 25-024

FOR CITY OF CASPER PUBLIC SERVICES DEPARTMENT

SOLID WASTE DIVISION

AND

ENGINEERING DIVISION

March, 2026

Fee proposals are being requested from qualified consultants to provide design and construction

administration services for In-Situ Enhanced Bioremediation for the Closed Balefill at the Casper

Regional Landfill.

Such proposals will be received by the City of Casper Public Services Department, City

Engineering Division, 200 North David, Casper, Wyoming, until 4:00 p.m., Local time, April 17th,

2026.

PROJECT BACKGROUND:

BALEFILL IN-SITU ENHANCED BIOREMEDIATION

PROJECT NO. 25-024

The Casper Regional Solid Waste Facility is required to perform water quality and methane emissions

monitoring and reporting as part of the Wyoming Department of Environmental Quality, Solid Hazardous

Waste Division (WDEQ/SHWD) Balefill Closure Permit, Permit Number 10.070 for the Closed Balefill,

and to meet the requirements for evaluating the effectiveness of Closed Balefill remedies in-place to

reduce the environmental impacts to groundwater. To further remediation efforts, In-Situ Enhanced

Bioremediation is to be designed and implemented as an additional remedy.

Exhibits Please see the following attached Exhibits that provide additional information as relates to

this RFP.

Exhibit “A”

Exhibit “B”

Exhibit “C”

Exhibit “D”

Example Professional Services Contract

Aerial Map of Closed Balefill

Items Eligible for Payment

2025 Monitoring Report

The selected Consultant shall provide the above services in accordance with all applicable Federal,

State, Local laws and regulations.

Funding

Funding will be from the City’s Balefill Fund reserves and reimbursed by the WDEQ’s Landfill

Remediation Program.

Page 1 of 9

I. SCOPE OF SERVICES

The Consultant shall perform the following services in connection with and respecting the Project. This

is a scope of work that is subject to change during contract negotiations with the selected professional

services firm (Engineer). Engineer must be able to provide all services indicated herein.

1. Work Objective and General.

A. Tasks already completed toward remediation of groundwater at the site include a nature

and extent of contamination study (NES), an assessment of corrective measures (ACM),

and construction of an initial remedy consisting of an impermeable membrane cap and a

gas collection and control system. Several years after implementation of the initial

remedy, groundwater is still not in compliance with groundwater protection standards.

The next remedy selected for implementation is in-situ enhanced bioremediation.

Engineer shall complete work necessary to design the selected additional remedy,

utilizing the findings of the NES and ACM work, administer construction contracts for

the selected remedy, operate and maintain the selected remedy, and other related tasks.

B. The overall project work is intended to be accomplished in a phased manner. The contract

shall be written for design of the selected remedy. Amendments are anticipated to add in

the work necessary to administer construction contracts, operate and maintain the

remedy, and other related tasks, in a phased manner. The contract may also be amended

to include additional, design if the City determines such work necessary based on

subsequent monitoring or other information that comes to light. The contract and

amendments will be issued for time periods necessary to complete each negotiated work

phase. Amendments to the contract will be at the discretion of the City of Casper and

Wyoming Department of Environmental Quality (WDEQ) and will be conditioned upon

satisfactory performance and successful negotiations for the continued work. The

schedule for meeting milestones, submitting deliverables, and review will be defined

during contract negotiations.

C. The landfill owner/operator is the City of Casper (City). A designee for the City will be

involved in the work and may review and comment on work products submitted by

Engineer. Engineer will meet with WDEQ and the City at appropriate milestones

throughout the life of the project.

D. Except where noted, Engineer shall submit drafts of all deliverables, including reports,

designs, plans, etc., for WDEQ and City review before finalizing them. Reviews may

involve both written comments and verbal discussion during meetings. Engineer shall

respond to all review comments and make revisions as appropriate, and shall not finalize

products until given approval to finalize. Except when comments are minimal, Engineer

shall normally provide a written response to all written comments.

Page 2 of 9

E. Engineer shall submit deliverables in electronic format to both WDEQ and the City and

shall be in pdf, Sanitas, WORD, AutoCAD, or other appropriate format approved by the

City of Casper.

2. Project Management. Engineer shall provide general project management services throughout

the duration of the Contract. These activities are generally related to most or all of the other

major work activities and phases and shall be included within each as needed. Project

management tasks include, but are not limited to, the following:

A. Invoicing and budget tracking.

B. Arranging subcontract services.

C. Scheduling.

D. Coordination of activities with WDEQ, the City if Casper, subcontractors, etc.

E. Preparing cost estimates for additional contract tasks.

F. Preparing planning documents, including, but not limited to, work plans, health and

safety plans, and sampling and analysis plans. These may be on a project-wide basis or

for a specific task, depending on circumstances, and shall be complete before the

corresponding work begins. Health and safety plans shall be submitted to WDEQ for its

information and records but are not intended to be for WDEQ approval. Work plans,

sampling and analysis plans, and other similar plans normally do require WDEQ review

and approval before the corresponding work begins.

G. Meetings. Arrange and attend meetings with WDEQ and City staff at least monthly to

discuss project status, scheduling, coordination, issues, etc. These will normally be by

conference call but will also be in person at times and may be more often if and when

necessary.

H. Permitting, clearances, notifications. Obtain permits and approvals needed from

applicable regulatory agencies for the work. Obtain easements, rights-of-way, or other

applicable permission from property owners for offsite work. Obtain clearances for

offsite activities when needed related to such issues as threatened and endangered

species, cultural resources, sage grouse, etc. Provide all required notifications to

applicable entities.

I. Other related activities as needed.

3. Design Remedy. This will be included in the initial contract. Engineer shall prepare a full

detailed design of the selected additional remedy, in-situ enhance bioremediation, adequate for

bidding and construction. If further additional remedies are later determined necessary, the

Page 3 of 9

contract may be amended accordingly. Design shall meet Wyoming Solid Waste Rules Chapter

2, Wyoming Water Quality Rules Chapter 27, and all other relevant regulatory requirements and

industry standards.

A. Design Concept. The basic concept of the remedy is explained in the ACM. It is

expected that the detailed design will further develop and improve upon the concepts

presented in the initial ACM. It is preferred that injections be placed as close to the waste

mass as feasible, so that monitoring wells within the permit area can provide evidence of

whether compliance with groundwater protection standards is achieved at the permit

boundary.

B. Subtasks. Major subtasks include, but are not limited to, those listed below.

(i) Survey surrounding areas to the extent needed for the design, permitting,

construction, and other foreseeable activities of the overall project scope.

(ii) Subsurface investigation as needed to develop design. This may include

geotechnical and hydrogeological testing, groundwater chemical and biological

testing, pilot studies, and other related activities. Design report documenting

pertinent design assumptions, methodologies, calculations, etc.

(iii) Plans and specifications of adequate detail for bidding and construction by

construction contractors.

(iv) Project manual, including project specific construction contract documents. The

City of Casper will provide several of the necessary documents, including the

request for bids, contract, bonds, and supplementary conditions.

(v) Construction Quality Assurance (CQA) Plan.

(vi) Estimate of probable construction cost.

(vii) Allow for at least two major design review stages by WDEQ and the City, at

roughly the fifty percent and ninety percent complete stages. However, also

communicate regularly to discuss major design decisions, to discuss pertinent

issues as they arise, to provide updates, etc., so that issues affecting design can be

addressed efficiently.

(viii) Permitting as required from all applicable entities, including WDEQ Solid and

Hazardous Waste Division (SHWD) and Water Quality Division.

4. Construction Oversight (CO). This will be included when specifically added by an amendment.

The City of Casper shall administer the bidding and construction process through the City’s

bidding standard procedures. Engineer shall provide services to assist the City in with those

Page 4 of 9

procedures. Engineer shall provide all services assigned to Engineer in the construction contract

documents, the CQA Plan, and this scope of work. Major subtasks for Engineer include, but are

not limited to, those listed below.

A. Conduct a pre-bid conference including discussion of important issues, site tour, and

issuing meeting notes.

B. Issue answers to bidder questions.

C. Issue addenda.

D. Evaluate bids received and provide a recommendation regarding award of the

construction contract.

E. Hold preconstruction meeting and regularly scheduled progress meetings with contractor,

major subcontractors, WDEQ, City of Casper, and other stake holders. The frequency of

progress meetings will depend on the complexity and scale of each construction project

but is tentatively expected to be weekly.

F. Provide construction observation and oversight to ensure to the extent practicable that

construction is in general conformance with the design and contract documents. Provide a

resident project representative. Provide additional field staff if necessary. Implement the

CQA Plan. Maintain daily records of site conditions, progress, issues, testing, etc.

G. Review and respond to or make recommendations as appropriate regarding

correspondence and submittals from contractor, such as schedules, shop drawings,

product technical submittals, requests for information, change requests, payment requests,

etc.

H. Maintain all records pertinent to the construction oversight process. Issue a certification

report and record drawings at the conclusion of construction.

I. The completion timeframe for the construction oversight work shall be included in the

amendment that specifically adds it to the Contract.

5. Development of Operation, Maintenance, and Monitoring Plan (OMM). The full scope of

these Plan will be determined based on the remedies implemented but will include at least the

following:

A. Develop OMM Plan activities according to the approved EMP (and Operation &

Maintenance manuals, if applicable). Provide roughly even spacing between monitoring

events.

Page 5 of 9

This is the opportunity summary page. It provides an overview of this opportunity and a preview of the attached documentation.

Description	Opening Date/Time	Closing Date/Time
Balefill In-Situ Enhanced Bioremediation, Project No. 25-024 Steven Stolte	March 05, 2026 8:00 AM	April 17, 2026 4:00 PM

Balefill In-Situ Enhanced Bioremediation, Project No. 25-024

Attachment Preview

See also