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CITY OF SANTA ANA Planning and Building Agency St. Barbara Catholic School Project No.: D-6289-01 Field Exploration Three (3) Hollow Stem Auger borings (B-1 through B-3) were Approved FOR PERMIT ISSUANCE Master ID: part of the recent subsurface investigation program and are shown on Existing Site Plan and Boring Location Map (Plate B-1, Appendix A). A continuous record of the materials encountered during drilling was made by our field representative and is presented on the Log of Test Holes, Plates I-1 through I-3. The lines designating the interface between soil strata on the Log of Test Holes represent approximate boundaries. Undisturbed samples were secured at frequent intervals from various locations for laboratory testing. The relative sampler penetration resistance from Standard Penetration Tests (SPT N- Values) obtained at frequent depth intervals are tabulated in the blows -per -foot column of the Log of Test Holes. The SPT N-Values provide an indication of the in -place relative density of soils with higher N-Values indicating denser or firmer materials. Groundwater Groundwater was encountered at 14 feet depth on all the borings during our recent field investigation. No springs or perennial stream flow in local drainages exist based on older topographic maps. Historical high ground water in accordance with CGS, Seismic Hazard Map, Newport Beach Quadrangle, released April 17, 1997, indicated around 5 feet depth. Groundwater is not anticipated to affect the site. However, these observations reflect site conditions at the time of the investigation and do not preclude changes in local groundwater conditions, localized seepage due to variations in rainfall, heavy irrigation, high and low tide, damaged structure (pipes, etc.), or altered site drainage pattern(s). Proper surface drainage is imperative to collect and convey any surface water off site to a suitable storm drain system. 7