Southern California is a rapidly urbanizing area of the Nation and residential development projects (both new construction and redevelopment) typically result in excavations. In many cases the excavations temporarily expose ancient sedimentary rock units and their contained paleontological resources.

Large residential developments often involve the cutting of millions of cubic yards of sedimentary rocks and PaleoServices staff have extensive experience in monitoring these large scale grading activities for unearthed fossil remains. Many redevelopment projects have a small geographic footprint but their excavations often extend to greater depths (i.e., deeper buried strata). PaleoServices field paleontologists are familiar with the unique demands of such "vertical" grading jobs and have over 200 years of cumulative experience in paleontological resource mitigation with many San Diego, Orange, Riverside and Imperial counties residential developers.