Construction of two decanting concrete features (750 sf and an adjacent 150-sf infiltration trench). The concrete pad will be constructed of reinforced concrete and will slope (at 2%) toward the filtration trench. Decanted storm drain waste liquid will drain down the sloped concrete pad, pass through the K-rail scupper drains, and enter the infiltration trench. The solids will remain on the concrete pad to dry, while the liquid will drain into an adjacent infiltration trench. It is anticipated that the solid material will remain on the concrete pad(s) from two to three day, after which it will be transported to Lamb Canyon Sanitary Landfill for disposal. The proposed decanting features will not increase the amount of material collected or frequency of collection.
Department of Fish and Wildlife, Region 6Air Resources BoardCalifornia Department of Parks and RecreationCalifornia Highway PatrolCaltrans, District 8Department of Water ResourcesNative American Heritage CommissionRegional Water Quality Control Board, Region 9Resources AgencyResources, Recycling and Recovery