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St. Barbara Catholic School <br />Project No.: D-6289-01 <br />CITY OF SANTA ANA <br />Planning and Building Agency <br />may, lS. <br />Approved <br />FOR PERMIT ISSUANCE <br />landslide, provided the recommendations of our report are incorporated i to the proposed <br />construction. It is also our opinion that the proposed construction will not &MW� affect <br />Date: <br />the geological stability of the site or adjacent properties provided the recommendations <br />contained in our report are incorporated into the proposed construction. <br />Conclusions and Recommendations <br />Based upon the review of our findings of this investigation, it is concluded that the <br />development of the project is feasible from a geotechnical engineering point of view. The <br />development of the proposed project would not have an adverse impact on adjacent <br />buildings provided our recommendations contained in this report and applicable <br />standards are followed during design and construction, and our recommended quality <br />control measures are implemented during construction. <br />Following are some of the key points of our conclusions: <br />Foundation Design Recommendations <br />Any new structures may be supported by either of the following two methods: <br />(a) Conventional continuous / and or Spread Footings. <br />(b) Mat footings <br />(a) Conventional Continuous / and or Spread Footings <br />We recommend over -excavating at least 2 feet below the bottom of footing and scarify <br />another 6 inches before backfilling and compacting on layers not exceeding 6-to 8-inches <br />in thickness and compacted to at least 95% of ASTM D-1557 Laboratory Standard. <br />Conventional continuous footings 18 inches deep and 12 inches wide and/or column <br />footing (3' x 3' x 24" deep) bearing on competent subgrade soil and may be designed for <br />an allowable bearing capacity of 2,000 psf. <br />14 <br />