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2000 CONCRETE <br />UPPORT WALL <br />NOTES: <br />SEWER <br />1. SUPPORTING WALL SHALL HAVE A FIRM BEARING ON THE SUBGRADE AND AGAINST THE SIDES OF THE EXCAVATION <br />2. WALL SHALL BE AT LEAST 2" FREE AND CLEAR OF ANY GAS OR WATER MAIN OR OTHER CONDUIT OR DUCT, <br />3. WHENEVER SO DIRECTED BY THE ENGINEER, THE CONTRACTOR SHALL PIERCE THE WALL WITH SUITABLE OPENINGS TO <br />PREVENT UNEQUAL PRESSURE RESULTING FROM FLOODING THE BACKFILL. THE VOLUME OF THE PIERCED OPENING <br />SHALL NOT EXCEED 1/2 THE VOLUME OF THE SUPPORTING WALL. <br />D� ,, o CITY OF SANTA ANA o <br />PUBLIC WORKS AGENCY <br />DATE - REVISION STD. PLAN <br />/16/09 R.R. DELETED GAS i METHOD OF SUPPORTING STORM DRAIN NUMBER <br />AND SEWER PIPES ACROSS TRENCHES 1207 <br />