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<br />than one cubic foot in volume, roots, stumps, tin cans, rubbish, frozen mate-
<br />rials and other similar articles whose presence in the backfill would cause
<br />excessive settlement. This type of backfilling may be accomplished above the
<br />pipe zone by anv mechanical ••eans or otherwise, at the option of the Contrac-
<br />tor. Surface shall be maint,'ned in passable condition for traffic until date
<br />of final i-spection. Backfilling under exposed existing utilities shall be
<br />compacted t•• prevent settlement and any future displacement.
<br />24,O0O,6.C. BACKFILL PROCEDURE ABOVE PIPE ZONE: (Type "b") Succeeding layers
<br />of backfill may contain coarser materials and F',11 be free from pieces of
<br />rock, concrete or clay lump more than one cubic '.)ot in volume, roots, stumps,
<br />tin cans, rub!•',, frozen materials and other :,imilar articles whose presence
<br />` in the backfill would cause excessive settlement. This type of backfilling
<br />may be compacted by puddling with hose and long pipe noizle or by flooding the
<br />trench, as the backfilling is accomplished above the pipe zone by any mechani-
<br />cal means or otherwise at the option of the Contractor. It is important that
<br />proper precautions be taken to prevent flooding of the pipe when flooding the
<br />trench, and the Contractor sha'.1 be wholly responsible for neglect of these
<br />precautions.
<br />24,000.6.0. PROCEDURE WHERE NO S MLEMF.NT IS ALLOWABLE: (Type "c") Succeed-
<br />ing layers of backfill may contain coarser materials and shall be free from
<br />pieces of rock, concrete or clay 'imp more than one cubic foot in volume,
<br />roots, stumps, tin cans, rubu.sh, . :en materials and :-ither similar articles
<br />whose presence in the backfill -uld cause excessive settlement. This vpe of
<br />backfilling shah he placed in i1niform layers, before compacti, ri-
<br />mately 6 inches, tamped by mechanical means to the density 'ie
<br />Specific Requirements.
<br />24,000.6.F.. PROCEDURE WHERE NO SETTLEMENT IS ALLOWABLE: (Tyne "d") Succeed-
<br />ing 1 •a of backfill shall be made of selected materials meeting require-
<br />r nt:, set forth in the ";,pecific Requirements." This type of backfilling
<br />A ill ue placed in a iform lavers, before compaction, of apprc imately 6
<br />w ches, tamped by me. .apical means to the density specified in the Specific
<br />equirements.
<br />01
<br />ks
<br />to
<br />be
<br />to
<br />to
<br />10
<br />r
<br />1#
<br />to
<br />24,000.6.F. DENSITY TESTS: Density teats will he performed by an approved
<br />soils testing firm at _arious locations and depths throughout tho project as
<br />dirocred by the Engineer. The Contractor shall cooperate fully and provide
<br />assistance as necessary to complete -here tests with no additional compensa-
<br />tion being made to the Contractor.
<br />All tenting cnsts nertaininK to passing c. sts shall he paid for by the Owner.
<br />All testing costs P"Tt n, to failing tests will be charged to and paid for
<br />by the contractor.
<br />Where areas have not : o compacted sufficiently to meet specific den- •
<br />quirementn, these areas Shall he excavated And reco< .rted until th,
<br />req,iiroment : are met. A? 1 ~oat for the wor, assnciAred with r- tion
<br />shall he the Contractor'.a sole reaponsilhility.
<br />2,,. nrg'.- 1 3
<br />2 /A. '45`i4h
<br />Co:- %right I`' '.
<br />Ronestroo, Rvepne, .Anderlik
<br />Associates, Inc.
<br />
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