Drilling
The subsurface conditions on the site were investigated by drilling eleven (11) exploratory test borings to 20 feet depth within the residential property, and five (5) exploratory test borings to 20 feet depth within the boundary of the commercial parcel. In this report commercial borings carry a C-xx designation, while the residential borings carry an R-xx designation. The approximate locations of the test borings are presented in the Test Boring Location Plan, Figure 2.
The test borings were advanced with a power-driven, continuous-flight auger drill rig. Soil samples were obtained in general accordance with ASTM D-1586 utilizing a 2 inch OD split-barrel sampler or in general accordance with ASTM D-3550 utilizing a 2½-inch OD modified California sampler. Samples were returned to RMG’s materials testing laboratory for testing and analysis. An Explanation of Test Boring Logs is presented in Figure 3. The Test Boring Logs are presented in Figures 4 through 11.
Laboratory Testing
The moisture content for the recovered samples was obtained in the laboratory. Grain-size analysis, Atterberg Limits, and Denver Swell/Consolidation tests were performed on selected samples for purposes of classification and to develop pertinent engineering properties. A Summary of Laboratory Test Results is presented in Figure 12. Soil Classification Data are presented in Figures 13 through 16. Swell/Consolidation Test Results are presented in Figure 17.