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Mr. Michael Carroll -2- 13 December 2011 c <br /> how cyclical drying and wetting of the GCL will impact the performance of the GCL. The <br /> traditional use of a GCL is having a geomembrane placed on top as the primary containment <br /> material. The GCL is typically used as secondary containment. Therefore, Board Staff also <br /> requests the design engineer show that the drying and wetting of the GCL in the site specific <br /> application at CHSL will not affect its performance in meeting Title 27 landfill cover <br /> requirements over the life of the project. <br /> Please provide the supporting information requested by 15 January 2012. If.you have any <br /> questions, please call me at (916) 464-4815 or contact me via email at <br /> vkjain waterboards.ca.gov. <br /> L <br /> Vinoo Jai , P.E. <br /> Water Resources Control Engineer <br /> Title 27 Permitting and Mines Unit <br /> Enclosure(s) <br /> 1.Email conversation with GSE regarding minimum cover soil depth to meet Title 27 <br /> requirements <br /> cc: Gino Yetka, CalRecycle, Sacramento <br /> Robert McClellon, San Joaquin County Department of Environmental Health <br />