7425 HARDESON RD BASE FILE 2016-01-01 MF Import

� LI � � � � GEOTECliNICAL ENGINEERING STUDY Trace and Associates July 19, 2005 E-1 1880 Page 2 We understand tlie proposed ;site improvements will also include the installai�cn of �n approximately 3,500 square f�ot, beiow-grade stormwater control vault th�t tvill be located benes,th th:� Farking and drive area between proposed Building� B and C. Based on preliminary design information provided by the client, the vault will be appro>;imately 100 feet long (east-west) and 35 `=et, wide (north-south). The bottom of the Froposed vault will be located at an elevatioii of approximately 474 feet, approximately 6 to 8 feet below existing grade. The proposed structure will likely consist of cast-in-place ccnr.rate walls with a slab-on-grade base and a prefabricated concrete cover. We estimate maximum cuts of 4 feet or less will be required to reacli construction subgrade elevations in the proposed building areas and most of ti�e proposed parking lot improvement area. Maximum cuts within the proposed vault area will likely be in the range of 6 to 10 feet below existing grade. The site will be accessed off of Sievers-Ducey Boulevard on the east side of the site and off of Hardeson Road to the west. � At the time our study was performed, the site, proposed buildings, parking and - driveway configurations, and our exploration locations were approximately as shown � on the Test Pit Location Plan, Plate 2. If the above design criteria are incorrect or crange, we should be consulted to review � the recommendations contained in this report. In any case, ECI should be retained to perform a general review of tlie final design. � � � � � � �W Scope of Services We performed this study in general accordance with the scope of services outlined in our May 23, 2005, proposal. On tliis basis, our study addresses the following: • Surface and subsurface soil and water conditions • Site preparation, grading and earthwork procedures, including st�ipping depth recommendations and details of structural fill placement and compaction • Suitability of existing on-site materials for use as structural fill, and recommendations for imported till materials • Seismic hazard analyses, including evaluation of potential "quefaction hazard eanh consuliants, inc.