Assessment of the Performance of Engineered Waste Containment Barriers (2007) / Chapter Skim
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Appendix B Methods for Monitoring Engineered Barrier Performance
Appendix B Methods for Monitoring Engineered Barrier Performance
Pages 113-114
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From page 113... ...
Establish leakage rates for bottom Accuracy of measurement is a barriers before and after waste function of boundary conditions emplacement and for covers 9. Gas-phase constituent Gas/air samples analyzed using Determine quantity and quality of Complex geospatial modeling may concentrations and flow rates handheld instruments and/or flux gas emissions and air quality be required to analyze downwind through cover systems chambers measurements obtained from tracer tests; point measurements from flux chambers may not capture emission patterns; results of questionable quality 10.
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From page 114... ...
Vertical barrier leak detection Wells, drainage layers installed Determine the amount of leakage Results of questionable reliability; along the midsection of vertical and thus the performance of vertical rarely used in practice; requires barriers walls installation of the collection and removal system in the barrier; integrity of half of the thickness of the barrier is assessed 20. Radioisotope concentrations Total radiation dose Identify releases and establish Primarily of concern for low-level concentration gradients radioactive waste NOTES: CQA = construction quality assurance; EM = electromagnetic; GPR = ground-penetrating radar; LCRS = leachate collection and removal system; LDS = leak detection system; TDR = time domain reflectometry.
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