COMPLIANCE INFO_FILE 2 - Laserfiche WebLink

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REPRWUCED AT GOVERNMENT EXPENSE, construction procedure shall be altered, changed or modified to meet the specified compaction requirements. 3.4.1 Compaction of Trench Refill: In rock, compact to 95 percent of ASTM D 1557, Method D, maximum density. In soft, weak, or wet soils, tamp refill to consolidate and densify the material. In stable soils, compact to 95 percent ASTM D 1557, Method D, maximum density. 3.4.2 Backfilling the Tank Cavity: Place backfill in layers not more than 8 -inches thick and within 2 percent of optimum content and compact to at least 95 percent of maximum density (ASTM D 1557, Method D). 3.5 FINISHING AND SITE CLOSURE: The completed backfill shall conform to the existing terrain. The finished surface shall be reasonably smooth, compacted, and free from irregular surface changes. The degree shall be that ordinarily obtainable from blade -grader operations, except as otherwise specified. The site finishing work will be undertaken after the regulatory agency has approved the tank removal and closure work. After completion of finishing work, the general site will be cleaned of construction debris and a final inspection will be performed. After successful inspection and receipt of documentation of the tank and tank cavity inspection from the Government Consultant, the tank removal project will be considered completed and final. 3.6 ASPHALT AND CONCRETE AREAS: Asphalt and concrete areas shall be finished as follows: The excavations will be backfilled with remaining excavated material, if clean, to within 16-18 inches of grade, topped by 12 inches of class 2 aggregate compacted to 90-95 percent density, and finished with 4-6 inches of asphalt paving or concrete (as shown in Sketch I'Ll'). 3.7 LAWNS AND LANDSCAPED AREAS: Where excavations cross lawn areas, sod shall be replaced following backfilling. Carefully remove sod prior to excavation. Store and maintain sod until earthwork is completed. Any damaged sod shall be replaced at the Contractor expense (as shown in Sketch "Ll'). 3.8 FIELD SAMPLING AND TESTING: In addition to provisions set forth elsewhere in this contract, all sampling and testing shall be conducted by an approved testing laboratory. Test backfill for conformance to gradation limits in accordance with ASTM C 136, ASTM D 2419 and ASTM D 2487. Test backfill materials for moisture density relations in accordance with ASTM D 1557, Method D. Perform at least one of each of the required test for each material used. Provide additional tests as specified above for each source change. Perform density tests in randomly selected locations and in accordance with ASTM D 1556 or ASTM D 2922 and ASTM D 3017 as follows: one test per 50 linear feet in each lift for trenches (minimum of one test per lift) and one test in each layer of lift for the tank cavity. ***END OF SECTION***