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Project No.: D-6289-08 St. Barbara Catholic School Percolation -Infiltration Tests Introduction Geotechnical Solutions, Inc. (GSI) has performed field investigation CITY OF SANTA ANA Planning and Building Agency may, lS. Approved FOR PERMIT ISSUANCE Master ID: using borings and sampling of earth material and field percolation tests at the proposed locations as shown on Existing / Demolition Site Plan, Boring & Percolation Tests Location Map (Plate B in Appendix A) at 5306 West McFadden Avenue, California. The main purpose of this study is to provide infiltration rates of subgrade material based on field percolation tests so that an appropriate system incorporating Storm Water permanent best management practice (BMP) to manage surface water into the ground and the appropriate infiltration basins, or any other approved system may be designed, and existing drainage be improved. Field Exploration Field exploration consisted of drilling two borings, PC-1 and PC-2, 8-inches in diameter and extended to 5-feet depth below the existing ground as shown on Existing / Demolition Site Plan, Boring & Percolation Tests Location Map (Plate B). The percolation test logs are presented on Plates D-1 through D-3 in Appendix A. Borings 13- 1 through B-3 were drilled varying from 16'-6" to 51'-6" depths during our geotechnical investigation and their logs are also attached in Appendix B. The attached logs tabulate data based on laboratory classification tests and visual observation by the field engineer at the site. During drilling bulk samples of earth material obtained for further laboratory test. Groundwater Groundwater was encountered at 14 feet below the ground surface during our drilling program for St. Barbara Catholic School. The Historical high groundwater depth was found to be around 36.9 feet deep based on