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PERCOLATION TESTS Information on the Percolation Tests and the data from the Percolation Tests will be presented in a separate report SEISMICITY The site is located approximately 45 Kilometers northeast of the Vaca-Kirby Full-Montezuma Hills/e Fault Zone. This fault has a potential to cause moderate strength seismic events. The site is located at 38.12310 latitude and-121.21709 longitude. We recommend that your structural engineer use these coordinates to obtain the latest seismic design criteria. The site class is D for the site. FIELD INVL'STIGATION Our field investigation included a visual reconnaissance of the existing surface condition, a subsurface exploratory boring and obtaining representative soil samples for laboratory testing. Subsurface conditions were explored by drilling one boring which was 24.0 feet deep, using a NATS B-61 drill rig. The log of this boring which presents descriptions and classifications of the soil strata encountered using the Unified Soil Classifications System has been included in Appendix A. A Unified Soil Classification symbol explanation has been included as Plate 1. The boring location is shown on Figure 2 Representative soil samples were obtained from the boring at selected depths for transportation to our laboratory. The samples recovered consisted of relatively undisturbed brass liner samples and disturbed bag samples. The samples are recovered by driving a 2-1/2 inch and 1 3/8 inch sampler into the ground. The samplers were driven by repeatedly dropping a hammer weighting 140 pounds from a height of 30 inches. The number of blows were recorded and are expressed on the boring log in a number representing blows per foot. The blow count provides a measure of soil strength as it relates to soil's in situ consistency or condition. The samples were obtained from the borings generally at intervals not exceeding five feet. LABORATORY TESTING Classification Soils were visually classified according to the Unified Soil Classification System, as presented in the boring log in Appendix A. Most of the laboratory testing program was designed to review classifications made in the field. (3)