Laserfiche WebLink
u <br />density tests performed in the field to assure that the material was being placed, moisture <br />conditioned and compacted according to the project specifications. Approximately 15,600 cy of <br />Subgrade Fill (SF) soils were placed on the 5:1 slope and floor areas of FU -10. The finish grade <br />survey of the Subgrade Fill (SF) soils was performed by RJA and Associates. The laboratory tests <br />and field testing results for the Subgrade Fill (SF) soils are included in Appendix C. <br />Modified Proctor (ASTM D-1557): The Ausenco Vector CQA monitor performed six (6) modified <br />Proctors (ASTM D-1 557A) on the Subgrade Fill (SF) soils, which corresponds to a frequency of 1 test <br />per 2,600 cy. A summary of these test results is shown in Table 4, and all test results are included in <br />Appendix C. <br />Grain Size Analysis and Atterberg Limits of Subgrade Fill Soils: Three (3) Sieve Analyses <br />(ASTM D422), and Atterberg Limit tests (ASTM D4318), were performed on Subgrade Fill (SF) soils. <br />A summary of the test results is also included in Table 3. Detailed results of these tests are included <br />in Appendix C. <br />TABLE 3 <br />SUBGRADE FILL LABORATORY TESTING SUMMARY <br />Moisture and Density Testing: The Ausenco Vector CQA monitor recorded 62 passing in-place <br />nuclear method unit weight (ASTM D-2922) and moisture content (ASTM D-3017) tests during the <br />compaction of the Subgrade Fill (SF) soil materials. The total number of passing tests recorded <br />corresponds to a frequency of 1 test per 251 cy, which satisfies the specified minimum required <br />frequency of 1 test per 500 cy. Also, seven (7) Subgrade Fill (SF) soil samples were collected at the <br />nuclear test locations for microwave and oven moisture content determination, to check the accuracy <br />of the nuclear gauge. The specified frequency for this test was 1 per 5,000 cy; the actual frequency <br />was 1 test for every 2,229 cy. Only one area failed to meet the acceptable compaction at test <br />location SF -21, which indicated low compaction due to excess moisture. The area was reworked by <br />the contractor and retested (test SF -21A) with passing results. Summaries of the field moisture - <br />density tests can be found in Appendix C. <br />Upon completion of the Subgrade Fill (SF) soil placement on the slopes, the Contractor prepared the <br />compacted soil for geosynthetics deployment by working the surface with a smooth drum roller. The <br />Ausenco Vector CQA monitor observed the smooth drum rolling procedure to verify that the <br />Contractor left a smooth surface, free of ridges, indentations, or oversize soil components, that could <br />damage the overlaying geosynthetics. Once this surface preparation was complete the area was <br />considered ready for geosynthetics deployment. These areas were then inspected by the Ausenco <br />Date: October 2010 <br />USVC0004800 <br />Final Construction Quality Assurance Report <br />