Geotechnical and Environmental Specialists. Servicing Sonoma, Marin, Mendocino, Lake and Napa Counties to all of Northern California. We handle complex projects such as redevelopment of contaminated areas, seismic studies for schools, bridge foundations studies, landslide repairs, groundwater remediation, etc. Dedicated to providing the highest quality of service in the fields of geotechnical engineering and environmental consulting. From project concept to project completion, our experienced and innovative staff manages and coordinates services to keep your projects on schedule, within budget, and in compliance. BAI optimizes and customizes services for our clients by having in-house talent and experience available when needs arise.