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ST. BARBARA CATHOLIC SCHOOL TASK 2 75-24272-01 <br />DIOCESE OF ORANGE SEPTEMBER 12TH, 2024 <br />SANTA ANA, CA BID & PERMIT SET <br /> <br />EARTHWORK 312000 - 15 <br />3. When thickness of compacted base course is 6 inches or less, place materials in a single <br />layer. <br />4. When thickness of compacted base course exceeds 6 inches, place materials in equal <br />layers, with no layer more than 6 inches thick or less than 3 inches thick when <br />compacted. <br />3.21 PAVEMENT REPAIR <br />A. Repair or patch asphalt pavement as specified in Section 321216 Asphalt Paving. Repair or <br />patch concrete pavement, curbs and gutters as specified in Section 321313 Concrete Paving. Do <br />not repair pavement until trench has been backfilled and compacted as herein specified. As a <br />minimum, maintain one-way traffic on roads and streets crossed by trenches. <br />3.22 FIELD QUALITY CONTROL <br />A. Testing Agency Services: Allow testing agency to inspect and test each subgrade and each fill <br />or backfill layer. Do not proceed until test results for previously completed work verify <br />compliance with requirements. <br />1. Perform field in-place density tests according to ASTM D 1556 (sand cone method), <br />ASTM D 2167 (rubber balloon method), or ASTM D 2937 (drive cylinder method), as <br />applicable. <br />a. Field in-place density tests may also be performed by the nuclear method <br />according to ASTM D 2922, provided that calibration curves are periodically <br />checked and adjusted to correlate to tests performed using ASTM D 1556. With <br />each density calibration check, check the calibration curves furnished with the <br />moisture gages according to ASTM D 3017 <br />b. When field in-place density tests are performed using nuclear methods, make <br />calibration checks of both density and moisture gages at beginning of work, on <br />each different type of material encountered, and at intervals as directed by the <br />Architect. <br />B. Footing Subgrade: At footing subgrades, at least one test of each soil stratum will be performed <br />to verify design bearing capacities. Subsequent verification and approval of other footing <br />subgrades may be based on a visual comparison of subgrade with tested subgrade when <br />approved by Architect. <br />C. Paved and Building Slab Areas: At subgrade and at each compacted fill and backfill layer, <br />perform at least one field in-place density test for every 2,000 sq. ft. or less of paved area or <br />building slab, but in no case fewer than three tests. <br />D. Foundation Wall Backfill: In each compacted backfill layer, perform at least one field in-place <br />density test for each 100 feet or less of wall length, but no fewer than two tests along a wall <br />face. <br />E. Trench Backfill: In each compacted initial and final backfill layer, perform at least one field in- <br />place density test for each 150 feet or less of trench, but no fewer than two tests.