PJC & Associates, Inc. has a professional staff that has extensive experience in the fields of geology, engineering geology, and hydrogeology. We can evaluate and address potential geologic and seismic hazards that affect your projects. Our geological services include slope stability analysis, erosion evaluations, Alquist-Priolo fault rupture studies, groundwater availability studies, septic system feasibility, geological reconnaissance, geologic hazard evaluations, and more. PJC & Associates, Inc. geotechnical and geological services in Northern California including the following areas: Sonoma County, Marin County, Napa County, San Francisco County, Mendocino County, Lake County, Humboldt County, Contra Costa County, Solano County, Santa Clara County, Santa Cruz County, San Mateo County, Nevada County, Lassen County, Alameda County, Bay Area, and beyond.