Earth Systems provided geotechnical services for the Winnetka and Collier Station Post Offices in the Canoga Park District of California. Each structure measures approximately 12,000 square feet and was constructed on spread (pad) footings. Loading docks were also included in the design of the Winnetka Station. For these structures, Earth Systems conducted geotechnical engineering investigations and provided design parameters for foundations, retaining walls, and grading recommendations. Our certified technicians and inspectors provided observation and testing of earthwork during the construction of these United States Post Office facilities.