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J <br />K <br />L <br />M <br />z <br />Stability of Excavations: <br />1. Slope sides of excavations to comply with local codes and ordinances <br />having jurisdiction. <br />2. Shore and brace where sloping is not possible because of space <br />restrictions or stability of material excavated. <br />3. Maintain sides and slopes of excavations in safe condition until <br />completion of backfilling. <br />Shoring and Bracing: <br />1. Establish requirements for trench shoring and bracing to comply with <br />local codes and authorities having jurisdiction. <br />2. Maintain shoring and bracing in excavations regardless of time period <br />excavations will be open. Carry down shoring and bracing as excavation <br />progresses. <br />Dewatering: <br />1. Prevent surface water and subsurface or groundwater from flowing into <br />excavations. <br />2. Do not allow water to accumulate in excavations. <br />3. Provide and maintain pumps, well points, sumps, suction and discharge <br />lines, and other dewatering system components necessary to convey <br />water away from excavations. <br />Stockpile satisfactory excavated materials where directed, until required for <br />backfill or fill. Place, grade and shape stockpiles for proper drainage. <br />Trenches shall be uniform width required for the particular item to be installed, <br />sufficiently wide to provide ample working room. Provide minimum 8 in. <br />clearance on each side of pipe or conduit. <br />1. Excavate trenches to depth indicated or required for indicated flow lines <br />and invert elevations. <br />2. Where , rock is encountered, carry excavation 6 in. below scheduled <br />elevation and backfill with a 6 in. layer of crushed stone or gravel prior to <br />installation of pipe. <br />3. For pipes or conduit 5 in. or less, excavate to indicated depths. Hand <br />excavate bottom cut to accurate elevations and support pipe or conduit <br />on undisturbed soil. <br />05/08 02221 -7 05 -4893 <br />