TRUSTED MISSION. SHARED EXPERIENCE. Tepa - Weston Joint Venture (JV); a Small Business Administration (SBA)-certified 8(a), tribally owned Small Disadvantaged Business (SDB), and Indian Small Business Economic Enterprise (ISBEE), is a strategic collaboration between Tehama Technical Services, LLC (Tehama TS) and Weston Solutions, Inc. (Weston) under the SBA’s Mentor Protégé Program.
About Us
Yosemite National Park, CA
Why Choose Tepa - Weston JV Seamless solutions combining unmatched technical expertise and the unique tribally owned 8(a) advantage. f Positive Impact
Profits derived from JV work contribute to Tepa’s distribution to its owning Tribe in support of tribal initiatives including education, housing assistance, and eldercare.
f Proven Track Record
Established in 2005, Tepa, LLC (Tepa) is owned by the Paskenta Band of Nomlaki Indians. The Tepa Companies are wholly owned subsidiaries of Tepa, which provides a common administrative and executive management team to reduce client costs and improve project efficiency. Tehama TS is an 8(a)-certified SDB and a wholly owned subsidiary of Tepa. Since 2005, the Tepa Companies have completed more than 2,250 projects valued at $3B. Weston is a large, 100% employee-owned national environmental and infrastructure services firm with a 65+ year history of serving federal, state, and local government and commercial clients. Over the past decade alone, Weston has executed $1B+ in federal work, delivering environmental, infrastructure, construction, and remedial services to CONUS and OCONUS facilities. Our partnership builds upon multiple projects performed as the JV, under prime and subcontractor relationships, as well as decadeslong working relationships between several Tepa Companies and Weston personnel. Tepa - Weston JV leverages joint expertise and capabilities, providing a comprehensive range of environmental services supporting federal clients in addressing both historical and emerging requirements. Both partners have performed thousands of projects nationwide for key defense clients, including AFCEC, USACE, NAVFAC, and DLA.
Business Information UEI WDWJBEQ52M23 CAGE 07L45
Successfully negotiated and delivered sole-source direct awards up to $100M, and JV partners combined have delivered $12B in environmental services over the past 20 years, including 170 PFAS projects valued at $156M and 205 munitions response projects valued at $222M.
f Expertise and Reliability
Decades of experience working with various Federal defense and civilian agency programs
f Trust and Credibility
Nationally recognized subject matter experts with roles in ITRC, SAME, and NAOC, along with highly skilled management and technical staff, organized to maximize self-performance capabilities under the JV
f Long-Term Commitment
Partnership as SBA-certified 8(a) SDB, ISBEE through Oct. 2030
f Financial Compliance
Defense Contract Audit Agency (DCAA)-approved accounting systems, Defense Contract Management Agency (DCMA)-approved procurement systems, and Earned Value Management procedures
Full-Service Capabilities and Services f PFAS and Emerging
Contaminants
f High-Resolution Site
Characterization
f Site Inspection, Investigation,
NAICS 562910 (Primary)
and Remediation Action
f Munitions Response f Long-Term Monitoring,
Remedy-Optimization
f Environmental Compliance
and Permitting
f Engineering Design
Contact Tepa Companies
Weston Solutions, Inc.
Sherry Gibson, PE, PMP Tepa Companies President, Engineering & Environment Division Sherry.Gibson@Tepa.com mobile (719) 437-5131
Lisa Kammer, PG Weston Solutions Vice President & Technical Director Lisa.Kammer@WestonSolutions.com mobile (603) 703-9095 October 2026
PUBLISHED PFAS INSIGHTS
Project Highlights
Novel insights from multivariate analysis of metadata from a large PFAS remedial investigation dataset
Environmental Construction and Optimization Services (ECOS)
To read the paper, scan below
CONUS/OCONUS | AFCEC | Contract FA890326D0065 Capacity: $3.5B | 9/23/2026–9/22/3034 Contract Summary: Through this nationwide vehicle, Tepa-Weston JV will compete for task orders spanning environmental planning, investigations, compliance, restoration and remediation, and environmental construction and demolition.
This award expands the JV’s ability to deliver integrated, results-focused solutions that advance environmental compliance, site restoration, and mission readiness.
Optimized Remediation Contract
Moody AFB, Georgia | USACE Savannah District | Contract W912EP16D0009 | TO W912HN20F1024 Value: $7.9M | PoP: 9/08/2020–9/07/2027 Project Summary: Tepa is conducting site restoration to achieve Performance Objectives at nine IRP sites with chlorinated solvent-related contamination. Scope includes maintaining established remedies, implementing optimizations to enhance remedial progress at applicable sites, and achieving site-specific objectives. Remediation activities are being conducted pursuant to RCRA and under an RCRA Hazardous Waste Corrective Action Permit with regulatory oversight provided by the Georgia Environmental Protection Division.
Hydraulic Capture and Point Source Removal (PFAS/PFOA)
Shaw AFB, South Carolina | USACE Omaha District Contract W9128F20D0050 | TO W912F21F0134 Value: $47.4M | PoP: 6/11/2021–9/30/2025 Project Summary: Historical fire training and emergency response activities released AFFF‑related PFAS into soil and groundwater at three former burn pits and contributed to on‑ and off‑base plumes impacting drinking water. Weston (as Weston-ER Federal Services JV) led site investigations and treatability studies and developed and implemented Interim Remedial Action to rapidly mitigate human health and environmental risks. We designed and constructed an innovative groundwater treatment plant with trench‑based extraction combined with GAC and ion exchange, achieving full hydraulic capture of PFAS‑impacted groundwater and rapidly reducing risk to drinking water receptors. The optimized design expedited regulatory approval; delivered approximately $2M in cost savings; and earned client recognition for exceptional quality, timeliness, and cost‑effectiveness.
Nationwide Coverage With more than 35 offices and 1,500+ personnel nationwide, Tepa - Weston JV can respond quickly to execute mission objectives, wherever they arise. Tepa Companies Headquarters in Kansas City, MO Weston Headquarters in West Chester, PA
October 2026