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c, a. <br /> Geotechnical ingineering Report <br /> Proposed Ahn Warehuuse <br /> hlav 11, 2001 <br /> CG File No. ll21 <br /> Pagc 13 <br /> slab-on-grade tloors where moisture control is impoRant, the slab should be a minimum of 1 foo[ <br /> above surrounding grades. <br /> Where used, foo[ing drains should consist of 4-inch-diameter, perforated PVC pipe that is <br /> surrounded by free-draining matenal, such as pea gravel. Footing drains should discharge into <br /> tightlines leading to an appropnate collection and discharge poinL For slabs-on-grade,a drainage <br /> path should be provided from the capillary break material to the footing drain system. Roof <br /> drains should not be connected to wall or footing drains <br /> Rockeries <br /> Rockeries may be used to face stable cuts in the native dense or very dense till. We do not <br /> recommend rockery heights greater than 4 feet where the rockeries will be facing 51] soils. Taller <br /> rockeries could bP used, but they should face a reinforced soil wall consisting of geogrid. 'I'he <br /> lareral pressure section of this report should be used in the design of the reinforced soil w211. <br /> We recommend that rockeries be constructed to Associated Rockery Contractors (ARC) current <br /> guidelines and appropnate local standards, dated 1992. We recommend that the rockery have <br /> adeyuate embedment, especially on slopes. We recommend that the base rock have a minimum <br /> embedment of 2 feet below the ground surface,or 5 fee[horizontal,whichever is greater. <br /> USE OF THIS REPORT <br /> We have prepared this repoR for Mr. Hyong Nam Ahn, for use in planning and design of this <br /> project. The data and report should be provided to prospective contractors for their bidding and <br /> estimating purposes, but our report, conclusions, and interpretations should not be constiued as a <br /> warranty of subsurface conditions. <br /> The scope of our work dces not include services related to construction safety precauti�ns, and <br /> our recommendations are not intended to direct the contractors' methods, techniques, sequences <br /> or procedures, except as specifically descrihed in our report. There are possible variations in <br /> subsurface conditions. We recommend that project planning include contingencies in bu�;et and <br /> schedule, should areas be found with conditions that vary�rom th�se described in this report. <br /> Cornerstone Geotechnical, Inc. / `�i�� � <br /> � <br />