About Us

Tremaine is a woman-owned environmental consulting firm rooted in scientific integrity, innovation, and a deep respect for the landscapes we serve. Specializing in biological, archaeological, and geophysical services, we support infrastructure, transportation, and utility projects across California with precision, purpose, and a personal touch.

Founded on decades of experience in both private and public sectors, Tremaine brings together a diverse team of permitted biologists, principal investigators, tribal liaisons, and field technicians who are not only qualified — but passionate about protecting California’s sensitive resources while helping our clients move projects forward.

We work seamlessly within CEQA, NEPA, NHPA, and Caltrans SER frameworks, offering field-tested solutions and defensible documentation. From rare plant surveys and protocol-level species studies to data recovery excavations and cultural resource awareness trainings — our team is committed to helping you navigate regulatory requirements while preserving the ecological and historical integrity of the project footprint.

At Tremaine, science and soul go hand in hand. We don’t just check boxes. We dig deeper — literally and figuratively — to deliver thoughtful, reliable environmental services that bridge progress with preservation.

 

Our services include all aspects of Environmental Services: 

 

• Feasibility Studies

• Management Plans

• Contextual Analysis

• Archaeological Reconnaissance/Survey

• Site Testing/Excavation

• Mitigation

• Cultural Resources Evaluations for Eligibility for CRHP and NRHP

• Sensitivity Training for Construction Crews

• Construction Monitoring

• Tribal Consultation

• Site Protection and Preservation

• Geophysical Surveys

• Geoprobe Soil Sampling

• Biological Assessments

• Daily Biological Monitoring and Preconstruction Surveys for Special Status Species

• Paleontological Monitoring and Services

• Stormwater Services - SWPPP/WPCP

 

Our work is well researched, objective, and intended to facilitate projects by implementing more effective approaches.