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Final Construction Quality Assurance Report Closure Cap Extension Revision 1- April 2014 Corral Hollow Landfill CCA Report Revision 1 • Modified Proctor (ASTM D-1557) May 1, 2014 GLA's CQA Monitor performed one (1) moisture -density relationships (ASTM D-1557), which exceeds the required frequency of 1 per 5,000 cy. Results of the tests are included in Appendix B. • Moisture and Density Testing GLA's CQA Monitor recorded 8 passing nuclear moisture -density tests during the placement and compaction of the general engineered fill material. The total number of passing tests recorded satisfies the minimum required frequency of 1 per 1,000 cy. Areas that failed to meet the acceptable compaction were reworked and/or replaced and retested until a passing result was achieved. Summaries of the field moisture/density testing are tabulated in Appendix B. For the extension of closure cap, the vegetative soil layer was placed as shown on the construction drawings. The vegetative soil layer was placed in in minimum 12 -inch loose lifts and compacted. Moisture was added with a water truck and mixed into the soil. After the vegetative soil layer material was compacted, field density tests were conducted with a nuclear density gauge to ensure 88% relative compaction and within f2% of optimum moisture content. GLA's CQA Monitor obtained samples of the vegetative soil layer material for CQA testing to ensure the material met the project specifications. Approximately 4,900 cy of vegetative soil layer was placed. The CQA monitoring of the vegetative soil layer placement included the following: • Grain Size Analysis of Vegetative Soil Layer Similar to the grain size analysis for the earthfill material, the CQA testing for the vegetative soil layer consisted of performing tests for sieve analysis (ASTM D-422) at a frequency of one per 5,000 cubic yards (cy). Three (3) sieve analyses were performed. The sieve analysis indicated that 100% of the material passed the rine# 2 -inch sieve, which meets the required maximum particle size of 3 inehes 2 inches. Detailed results of the foundation layer material testing are included in Appendix C. • Modified Proctor (ASTM D-1557) GLA's CQA Monitor performed three (3) moisture -density relationships (ASTM D-1557), which exceeds the required frequency of I per 5,000 cy. Results of the tests are included in Appendix C. • Moisture and Density Testing GLA's CQA Monitor recorded 6 passing nuclear moisture -density tests during the placement and compaction of the vegetative soil layer material. The total number of passing tests recorded satisfies -la-