Cayuse Environmental

OVERVIEW

Cayuse Environmental offers a wide spectrum of environmental and engineering services including infrastructure engineering, environmental remediation, environmental conservation, environmental compliance, pollution prevention, and environmental operations and maintenance services. In delivering these services to our clients, we provide operational efficiencies, cost savings and consistent quality.

What We Do

Cayuse Environmental, LLC, offers a wide spectrum of environmental and engineering services to our clients requiring engineering infrastructure, environmental remediation, environmental conservation, environmental compliance, pollution prevention and environmental operations and maintenance services. Cayuse brings these services to our clients providing efficiencies, cost savings and consistent quality.

Cayuse is committed to excellence by providing innovative and flexible solutions to Federal, State, Municipal, and Tribal Government Clients. Our core capabilities include:

Environmental Investigations & Remediation

• CERCLA and State Program Investigations

• Environmental Remediation Feasibility Studies

• Remedial System Design, Installation, Operation and Maintenance

• Long-Term Monitoring and Optimization

Environmental Compliance Management

• Environmental Assessments

• Natural Resources Management

• National Environmental Policy Act (NEPA) Support​

Unexploded Ordnance (UXO) Support Services

• UXO Escort

• UXO Anomaly Avoidance

• UXO Construction Support

Munitions and Explosives of Concern (MEC) Consultation

• Engineering and Surveying

• Infrastructure and Civil Site Design

• Surveying and Mapping

• Transportation Design and Construction

• Unmanned Systems & Remote Sensing

Air Quality, Compliance & Greenhouse Gas Management

• Air Permitting

• Compliance and Auditing

• Fenceline Monitoring

• Greenhouse Gas Management

• Leak Detection and Repair

Water Resources

• Water Resource Planning & Management

• Water Supply Development & Modeling

• Water Supply Distribution & Treatment

• Wastewater Treatment & Collection

EXPERIENCE

Unexploded Ordnance (UXO) Support Services

Cayuse provides services supporting activities taking place in UXO-impacted locations. Using both terrestrial and downhole magnetometry, our staff ensures the safe execution a variety of activities performed in areas where UXO is a concern such as:

• Roadway Construction

• Underground Utility Construction

• Geotechnical Investigations

• Archaeological / Cultural Resources Surveys

• Intrusive Environmental Sampling Investigations

• Land Survey and Monument Installation

• Vegetation Control

Operational Environmental Services – Active Range

Cayuse manages operations at one of the nation’s busiest U.S. Air Force training ranges, skillfully and cost-effectively providing highly-varied and consistently high-quality services. Work includes, but is not limited to, scheduling sorties; UXO characterization/removal; target maintenance and construction; hazardous materials management; heavy equipment operation, repair, and maintenance; electronics repair and maintenance; road and grounds maintenance; and other duties. Cayuse also administers the facility expense budget, ensuring required supplies and services are in place to enable seamless range operation. Since 2012, Cayuse has staffed this 14,000+ acre site supporting training missions to sharpen the skills of U.S. and allied military aviators and supporting service members with real-world target replication.

UXO Demolition

Cayuse provided Hawaii-licensed explosives blaster staff to manage and document demolition of Materials Presenting Potential Explosive Hazard (MPPEH) recovered from the Waipio Peninsula Confined Disposal Facility. As a Bureau of Alcohol, Tobacco, and Firearms explosives license holder, Cayuse procured and supplied donor explosives required to conduct the demolition operations. We performed 18 demolition events over the span of 18 months, disposing of over 1,260 pounds of explosive material without incident.

Municipal Drinking Water PFAS Treatment System

Cayuse completed a CERCLA (Comprehensive Environmental Response, Compensation and Liability Act) Non-Time-Critical Removal Action (NTCRA) addressing contaminated municipal drinking water for the city of Fountain, Colorado. Our team designed and constructed a system for integration with Fountain’s existing municipal water treatment infrastructure. Our treatment system treats water contaminated with perfluorinated alkyl substances (PFAS) including perflurooctanesulfonic acid (PFOS) and perfluorooctanioic acid (PFOA) and met the applicable U.S. Environmental Protection Agency Health Advisory Level of 70 parts per trillion at a rate of 1500 gallons per minute.

CERCLA RI/FS – Former Waikoloa Maneuver Area (FWMA) Area E

Cayuse conducted a Remedial Investigation / Feasibility Study (RI/FS) to characterize the nature and extent of Munitions and Explosives of Concern (MEC) and Munitions Constituent (MC) contamination at the 3,993.8-acre FWMA Area E. Cayuse also developed the associated Proposed Plan and Decision Document documents in compliance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Department of Defense, Department of the Army, and U.S. Army Corps of Engineers regulations and guidance.

Environmental Compliance Sampling

Cayuse performs quarterly underground injection control well compliance sampling at a remote Hawai’i island location requiring management of tight timelines for sample collection and shipping. We coordinate with local staff to efficiently perform sampling, meet short holding times and generate detailed reports documenting the field activities.

Community Relations Support

Cayuse managed and coordinated U.S. Army Corps of Engineers Restoration Advisory Board meetings, providing an opportunity for the community and stakeholders to be involved in the Waikoloa Maneuver Area environmental restoration process. These semi-annual meetings were conducted in physical, virtual and hybrid formats with Cayuse performing all aspects of meeting coordination. Our activities included everything from creation and update of comprehensive planning checklists, facilitating creation of presentation slide decks, arranging venues and audio-visual services, to publicizing meetings and producing hard copy documentation.

Former Army Bazooka Range Munitions Removal Action

Cayuse provided all services necessary to remove Munitions and Explosives of Concern (MEC) and Material Potentially Presenting an Explosive Hazard (MPPEH) from the Pohakuloa Training Area Former Bazooka Range on the Island of Hawai’i. We performed a surface clearance for just over 60 acres of military range land situated on unstable volcanic rock, coordinating the activities of multiple specialty subcontractors. The Cayuse team provided onsite demolition of Material Documented as an Explosive Hazard and removed 26 tons of Material Documented as Safe from the project area for recycling. To meet our client’s expedited schedule, Cayuse completed this work in 35 days from notice-to-proceed to demobilization with zero safety incidents.