ARCHIVED REPORTS_2014 - Laserfiche WebLink

Home Browse Search

Forward Landfill HYDROLOGY Compost Pond 07/17/2014 RWQCB Order No. R5-201400006 COMPOST FACILM 77.The Composting Facility is located on 7.6 acre parcel south of the South Fork of South Lidlelohns Creek. The facility consists of compacted native soh pad with a minimum one- percent slope to the north.The pad is protected from run-on by berms on the eastern edge and a portion of the south edge of the site. The site is stoped to drain to two designed to contain run-off from Me,25•year,104ninute duration'storm_CanposdM windrows are constructed normal to the slope to allow free drainage and minimize ponding. The surface native soils consist of lean clay to sO and ally day.This Order requires that the one-foot thick soh layer beneath composting pad areas be tested and if necessary conditioned and compacted to achieve a hydrau4ccondudivky of 1-X fe anisse or less. 78.Leachate,if any,is collected in the two ditches and drains to an unlined storm-water retention basin. The Discharger does not monitor,sample or otherwise control leachate. This Order requires that the retention pond be sized to contain at least a 2&-year,24-hour storm event and that the retention pond be equipped with synthetic liner. 79.Water colloded inl ie retention basin win either be evaporated,:used in the fr"-mixing of the compost.used for dust control,pumped to the on-siteWachate evaporationpod,or transported off-ske to a municipal treatment facility. 4. Compost Facility,run-on and run-of controW. a. Compost Facility shall implement storm water BMPs so that runoff water does not adversely affect the beneficial uses of any downstream water body. b. The Discharger shall monitor leachate and water in the retention basin as required by MRP R5-2014-0006- c. The retention basin shall be equipped with a.synthetic Onm shah_maintain a minimum two feet of freeboard and shall be designed and operated to minirnize the downward percolation of constituents; d. The Compost and Compost storage pads shall be designed,constructed and maintained to prevent to the greatest extent possible,ponding,infiltration, inundation,erosion,slope failure,and washout; e. The pad or pads shah have a minimum one percent slope; f. The Discharger shall maintain an effective run-on control system and for the composting area a run-off control system designed to withstand the maximum peak flow from a 25-year,10-minute storm;and g. The retention basin shah be designed to accommodate all runoff and direct precipitation from a 25-year,24-hour storm and maintain two feet of freeboard: Hydrology Compost Pond Page 4 of 6