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DocuSign Envelope ID:81 E05E8E-EED7-43D3-8B8A-0811 OE72140A <br /> SECTION 31 00 00 - CLEARING, GRADING AND EXCAVATION <br /> percent (95%) of Standard Proctor Maximum Dry Density. Fills in other <br /> areas shall be compacted to at least ninety percent (90%) of Standard <br /> Proctor Maximum Dry Density. <br /> M. Compaction moisture control shall be maintained between -1 and +3 <br /> percent optimum moisture content as determined by ASTM D-698 or as <br /> directed by the Engineer. Material that is too dry for proper compaction <br /> shall be moistened by suitable watering devices, turned and harrowed to <br /> distribute the moisture, and then properly compacted. When material is <br /> too wet for proper compaction, fill soils shall be dried prior to compaction. <br /> The soils shall be dried by aeration disking, harrowing, or other methods <br /> until the materials can be compacted to the specified density. Select <br /> material, as needed, will be provided from the work site or other <br /> acceptable source. <br /> N. All cuts, fills, and slopes shall be neatly dressed off to the required grade <br /> or subgrade, as indicated on the Plans. <br /> O. At locations designated on the Plans and/or as designated by the <br /> Engineer, the Contractor shall remove unsuitable material within the limits <br /> as directed and backfill with suitable material properly compacted to the <br /> finished subgrade. Undercut material may be used elsewhere on the <br /> project if the Engineer determines that it is suitable for the purpose. If it <br /> cannot be used, the Contractor shall dispose of it as directed herein <br /> before. <br /> P. Foundation excavations shall be made at the locations shown on the plans <br /> and to the exact subgrade required. Bottoms of excavations are to be <br /> level and in firm, solid, material, with soft material or voids treated as <br /> specified below. Excavated area shall be kept free of water during the <br /> construction period. Space shall be provided outside of footings and walls <br /> for placing forms and pointing masonry. <br /> Q. Where necessary, the sides of excavation shall be shored and sheathed, <br /> or cofferdams built, as required for protection of the work and employees. <br /> R. Should soft or unsuitable material be encountered at subgrade elevation, <br /> such material shall be removed and replaced with acceptable compacted <br /> select material, obtained on-site or off-site at the direction of the Engineer. <br /> Any other excavation below grade shall be replaced with good material, <br /> without additional compensation therefor. <br /> S. Should the specified depth for foundations prove insufficient to reach firm <br /> ground, the Engineer shall be notified and shall furnish instructions for <br /> proceeding with the work. Wherever footing elevations change, step- <br /> downs shall be made at a 2:1 ratio, unless otherwise shown. Connections <br /> Orange County DAA PN R00592-225N2 <br /> Walnut Grove Wastewater System January, 2021 <br /> 31 00 00-7 <br />