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Orange County Eubanks Road C&D Landfill <br />Construction Quality Assurance Plan <br />Revised March 15, 2021 <br /> <br /> <br /> 3) Observations to verify that the surface is properly compacted, smooth, <br />uniform, and consistent with design grades. Shall document in written form <br />and photographs the surface of the subgrade. <br /> <br />c. Cap Subgrade <br /> <br />The QAO shall include verification that an appropriate subgrade is established for cap <br />placement. This may include the placement and compaction of fill. The verification shall <br />include the following: <br /> <br /> 1. For cap foundations, observations of the daily or intermediate cover layer for <br />proper grading, soft spots, exposed waste or other conditions that could <br />adversely affect the cap material. Document the condition of the subgrade <br />prior to cap soil placement in writing. Photographs may be used as needed. <br /> <br /> 2. Measurements of the depth and slope of the excavation or fill to verify that it <br />meets design requirements. Document the depths of fill placed. <br /> <br /> 3. Observations to verify the quality of compacted fill. Observe and document <br />that Quality Control Testing was performed on compacted fill. Verify that QC <br />testing includes density, moisture content, Atterberg limits, soil <br />classifications, and maximum clod size. Compile documentation of QC <br />testing on compacted fill. Compile documentation of locations of QC testing <br />on compacted fill. <br /> <br /> 4. Observations of stripping and excavation to verify that there are no moisture <br />seeps and that soft, organic, or otherwise undesirable materials are removed. <br />Proof-rolling with heavy equipment can be used to detect soft areas likely to <br />cause settlement. Document in written form and photographs removal of <br />undesirable materials. <br /> <br /> 5. Observations to verify the removal of objects such as roots or objects that <br />could penetrate the cap. <br /> <br /> 6. Observations to verify that the surface is properly compacted, smooth, <br />uniform, and consistent with design grades. Document in written form and <br />with photographs the surface of the cap foundation. <br /> <br />C. GEOSYNTHETICS (NOT USED) <br /> <br /> <br /> <br />DocuSign Envelope ID: 0844D1D6-E311-4FC5-8B5B-BB1E27A908ED