2011-08-26_REPORT - M1980244 (28)

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ameO 4.0 EARTHWORK CQA TESTING AND MONITORING The following sections summarize results of the earthwork CQA testing and monitoring performed by AMEC for the 2011 Phase 5 VLF OSA 2nd Portion . AMEC conducted CQA testing of earthwork materials used for construction. AMEC performed CQA testing of in -place materials used for construction of the 2011 Phase 5 VLF OSA 2nd Portion. Table 4 presents specified and observed CQA testing frequencies. Figure 1 shows the site plan and coordinate system used to locate tests. In accordance with the AMEC CQA Plan, when an AMEC monitor observed deficiencies, the monitor determined the nature and extent of the problem and notified Ames and /or CC &V. When unsatisfactory test results identified a deficiency, AMEC performed additional tests to define the extent of the deficient area. Ames corrected deficiencies to meet the requirements of the specifications, and AMEC retested and /or approved the corrected deficiency prior to any additional related work. The following sections include discussions of the deficiencies encountered. 4.1 Results of Laboratory Soils Testing AMEC performed laboratory testing of soils during all aspects of the 2011 Phase 5 VLF OSA 2nd Portion construction. AMEC's on -site soils laboratory at CC &V performed all of the material testing. To verify that the earthwork materials used during construction met project specifications, AMEC performed the following American Society for Testing and Materials (ASTM) tests: • Rock corrected density values (ASTM D4718); • Grain size distribution (ASTM D1140 for material finer than the No. 200 sieve, and ASTM C117 and C136 for coarse material); • Moisture content (ASTM D2216); • Atterberg limits (ASTM D4318); AMEC Earth & Environmental, Inc. 2000 S Colorado Blvd 2 -1000 Denver, CO 80222 Tel 303 - 935 -6505 Fax 303 - 935 -6575 www.amec com 16