2012-12-27_REPORT - M1980244 ‎(8)‎

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 12/27/2012
• Doc Name: QA Monitoring and Test Results- LOB Liner Extension- Cover to Append. G.1
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

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4.2.1 Subgrade Preparation
AMEC monitored subgrade preparation, including verification that Ames compacted the
subgrade with a smooth drum vibratory compactor. AMEC verified that Ames removed
protruding rocks from the subgrade surface prior to BF placement. AMEC verified that the
subgrade surface was moisture conditioned, smooth, and unyielding prior to BF placement.
4.2.2 Site Grading
Structural fill was re- placed, shaped and compacted for finish grade.
4.2.3 Bedding Fill (prior to GCL installation)
Field testing included monitoring of placement and preparation of BF for GCL deployment,
testing in -place moisture and density with a nuclear gauge.
4.2.3.1 Field Monitoring
AMEC observed BF placement to verify lift thickness, adequate compaction, acceptable
moisture conditions, final compacted thickness, and suitability for geomembrane deployment.
AMEC identified angular particles on the fill surface and ruts, and brought these features to the
attention of Ames for repair. AMEC verified these repairs were completed. Ames laborers
placed fines from the BF temporary piles to smooth and re- compact the fill surface in areas that
were observed to be rough or inadequate, as discussed in Section 6.1. AMEC and Lonestar
approved the final surface of the BF prior to GCL deployment.
4.2.3.2 Moisture- Density Test Results
AMEC performed a total of two in -place moisture - density tests of BF. AMEC compared results
of the field moisture content and density tests to the Proctor dry density and optimum moisture
content values of material with similar gradation and plasticity characteristics. Proctor dry
density and optimum moisture content values for samples with greater than ten percent plus
three - quarter -inch (3/4 inch +) material were corrected according to ASTM D4718 to facilitate
direct comparison to nuclear density values. The moisture - density testing frequency of
approximately one test per 1,590 cubic yards was perfromed. No moisture - density testing
frequency was specified. Nuclear density tests performed for the LOB Liner Extension are
summarized in Table 6.
4.2.4 Bedding Fill (above geomembrane)
AMEC provided visual monitoring of BF placement above the installed geomembrane. One
AMEC monitor and at least two Ames laborers were present monitoring each dozer AMEC
verified that wrinkles in the geomembrane did not fold over, that PVC grade markers were
placed on a maximum 50 -foot by 50 -foot grid and at grade breaks, and that unsuitable material
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