What will be done to improve stormwater drainage around the cell?
In consultation with DTSC, the RWQCB, the California Coastal Commission (CCC), and others, the drainage ditches around the entire cell will be modified to improve their capacity to collect and drain away stormwater runoff. Since existing drainage ditches were unable to keep up with the unusually heavy rainfall experienced in January 2010, they will be deepened. As an additional precaution, project engineers also will improve how water drains from the “anchor” trench where the edges of the 40-mil PVC bottom liner and GCL cover liner meet and are anchored and sealed around the perimeter of the cell (shown in the graphic above). Anchor trench drainage improvements will be installed along the north side of the cell, which is where engineers believe such improvements will provide the greatest benefit.
