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St. Barbara Catholic School <br />Project No.: D-6289-01 <br />No. 301. Pavement design recommendations are based on the latest <br />and recently tested R-value. <br />CITY OF SANTA ANA <br />Planning and Building Agency <br />may, lS. <br />Approved <br />FOR PERMIT ISSUANCE <br />is Indices (TI's) <br />Master ID: <br />Date: <br />An R-Value test was conducted on a representative sample of the near surface soil <br />consisting of silty sand and sand. The specimens were tested in a state as near to full <br />saturation as possible to simulate the condition the soil might attain at typical field <br />density and under adverse moisture conditions. <br />The R-Value for a representative soil was determined to be 30. Test results are as <br />follows: <br />Test <br />Moisture @ <br />Density <br />Exudation <br />Stabilometer <br />Number <br />Compaction <br />(Pcf) <br />Pressure (psi) <br />"R"-Value <br />a <br />8.3 <br />116.5 <br />200 <br />24 <br />b <br />7.8 <br />118.5 <br />350 <br />33 <br />c <br />7.5 <br />120.0 <br />450 <br />39 <br />* Interpolated 300 psi by Exudation, Rv = 30 <br />Faulting and Seismicity <br />The subject site, like the rest of Southern California, is located within a seismically active <br />region because of being located near the active margin between the North American and <br />Pacific tectonic plates. The principal source of seismic activity is movement along the <br />northwest -trending regional faults such as the San Andreas, San Jacinto, and Elsinore <br />fault zones. These fault systems produce approximately 5 to 35 millimeters per year of <br />slip between the plates. <br />We consider the most significant geologic hazard to be the potential for moderate to <br />strong seismic shaking that is likely to occur at the subject site. The subject site is in the <br />highly seismic Southern California region within the influence of several faults that are <br />no <br />