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• Specification No . : RGS0024-87 <br /> Part II - SPECIFIC CONDITIONS <br /> Section 10 - Earthwork <br /> condition . Establish requirements for trench shoring <br /> and bracing to comply with local codes and authorities <br /> having jurisdiction . Maintain shoring and bracing in <br /> excavations regardless of time period excavations will <br /> be open . Carry down shoring and bracing as excavation <br /> progresses . <br /> 1{1 . 6 . 2 . 6 Material Storage : Stockpile satisfactory excavated <br /> materials where directed by project engineer , until <br /> required for backfill or fill . Place , grade and shape <br /> stockpiles for proper drainage . Locate and retain <br /> soil materials away from edge of excavations . Dispose <br /> of excess soil material and waste materials as herein <br /> specified . <br /> 10 . 6 . 2 . 7 Excavation for Structures : Conform to elevations and <br /> dimensions shown within a tolerance of plus or minus <br /> 0 . 10 ' , and extending a sufficient distance from <br /> footings and foundations to permit placing and removal <br /> of concrete formwork , installation of services , other <br /> construction , and for inspection . In excavating for <br /> footings and foundations and tank holddown slab , take <br /> care not disturb bottom of excavation . Excavate by <br /> hand to final grade just before concrete reinforcement <br /> is placed . Trim bottom to required lines and grades <br /> to leave solid base to receive other work. Excavation <br /> to be checked by Soils Engineer . <br /> 10 . 6 . 2 . 8 Excavation for Pavements : Cut surface under pavements <br /> to comply with cross- sections , elevations and grades <br /> as shown on project grading plan. <br /> 10 . 6 . 2 . 9 Excavation for Trenches : Dig trenches to the uniform <br /> width required for particular item to be installed , <br /> sufficiently wide to provide ample working room . <br /> Excavate trenches to depth indicated or required . <br /> Carry depth of trenches for piping to establish <br /> indicated flow lines and invert elevations . Beyond <br /> building perimeter , keep bottoms of trenches <br /> sufficiently below finish grade to avoid freeze -ups . <br /> Where rock is encountered , carry excavation 6" below <br /> required elevation and backfill with a 6 " layer of <br /> crushed stone or gravel prior to installation of pipe . <br /> Grade bottoms of trenches as indicated , notching under <br /> pipe bells to provide solid bearing for entire body of <br /> pipe . Do not excavate trenches that are parallel to <br /> X-4 <br />