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1 2. BF-2: Soils that contain no rock larger than 6 inches at greatest dimension. If <br /> 2 expansive clays are present, such content shall not exceed one-third of the material <br /> 3 by volume, and shall be well mixed with noncohesive soils. <br /> i 4 <br /> s 1.03 QUALITY ASSURANCE <br /> 6 <br /> I 7 A. All compaction testing and gradation analysis will be arranged and paid for by the Owner. <br /> 6 Contractor shall be present when samples of bedding, select backfill, and backfill materials <br /> 9 are gathered for analysis. <br /> 10 <br /> 11 B. Where relative compaction densities are specified in these specifications, the maximum <br /> 12 density shall be determined in accordance with the latest revision of either California Test <br /> 13 216 (California Department of Transportation), ANSI/ASTM 1557, or AASHO T180 and the <br /> 14 actual density of in-place materials shall be determined in accordance with the latest <br /> 15 revision of either California Test 216 or 231, ANSI/ASTM 1556, or ANSI/ASTM 2922. Method <br /> 16 selection shall be made by the Engineer. <br /> 17 <br /> 16 C. Engineer will perform at least one test within each backfill material zone (BD, SB, BF). <br /> 19 Testing at more frequent intervals may be performed at the discretion of the Engineer. <br /> 20 <br /> 21 1.04 SUBMITTALS: In accordance with Section 01300. <br /> 22 <br /> 23 A. Written description of barricading, shoring, cribbing, bracing, and sloping precautions. <br /> 24 <br /> 25 1.05 PROJECT CONDITIONS <br /> 26 <br /> 27 A. Arrange construction sequences to provide the shortest practical time that the trenches will <br /> 26 be open to avoid hazard to the public, and to minimize the possibility of trench collapse. <br /> 29 <br /> 30 1.06 EXCAVATION CLASSIFICATION <br /> 31 <br /> 32 Regardless of the nature of material excavated, all excavation will be considered <br /> 33 unclassified. <br /> 34 <br /> 35 <br /> 36 PART 2: MATERIALS <br /> 37 <br /> 38 2.01 GENERAL <br /> 39 <br /> 40 All backfill material shall be approved before use and be free of cinders, ashes, ice, frozen <br /> 41 soil, large hard clods, organic debris, or other deleterious items. Trench excavation <br /> 42 materials may be used as approved. <br /> 43 <br /> 44 2.02 MATERIALS FOR BACKFILLING <br /> 4s <br /> a6 Furnish required bedding, select backfill and backfill materials listed under the appropriate <br /> 1 47 types of utility line in the sections to which this work relates. <br /> 48 <br /> 49 <br /> UTILITY TRENCHING & BACKFILLING <br /> 050594 02221-3 <br /> r <br /> r <br />