Laserfiche WebLink
CaliforniaRegional Water Qualityltontrol <br /> Terry Tamminen Central Valley Region Arnold Schwarzenegger <br /> Secretary for Robert Schneider,Chair Governor <br /> Environmental <br /> Protection <br /> 11020 Sun Center Drive#200 Rancho Cordova,CA 95670-6114 <br /> (916)464-3291 •Fax(916)464.4775 <br /> hap://www.swmb.ca.gov/rwgcb5 <br /> 9 March 2004 <br /> Mr. Kevin Basso, General Manager <br /> Forward Inc. <br /> PO Box 6336 <br /> Stockton, CA 92560 v v <br /> REVISED L FINAL CLOSURE PLAN, NCH l.titrl.0 LANDFILL, SANJOAQ I CO. <br /> (CASE NO. 3032) <br /> Regional Board staff(staff)has reviewed the Final Closure Plan French Camp Landfill(plan)initially <br /> submitted on 17 October 2001 and amended on 19 February 2004. The plan proposes to close French <br /> Camp landfill with a final cover consisting of at least two feet of foundation layer, overlain with one <br /> foot thick compacted clay liner and a vegetation layer. Staff has the following comments concerning <br /> the plan: <br /> 1. The plan involves re-grading the existing landfill with maximum slopes up to 2.5:1. Slope <br /> stability analysis indicates that these slopes will be stable and staff concurs. <br /> 2. The plan and slope stability analysis does not address stability of levee slopes, some of which <br /> are steeper than 2.5:1. French Camp landfill was placed and filled an area between two levees <br /> and these levees act as a waste containment structure. Staff is aware that Forward Inc. does not <br /> own or have responsibility for the levees. However,Forward Inc. should contact the <br /> responsible levee district and investigate options for reinforcing any unstable sections of the <br /> levee where failure may release waste from French Camp Landfill. <br /> 3. Some waste is located outside the landfill footprint beyond the levees in French Camp and <br /> Walker Sloughs. Stream sediment samples in the affected areas indicate that this fugitive waste <br /> is not hazardous and has not released significant pollutants into the two sloughs. Test pits and <br /> field observations of the levee slopes indicate that the waste is wide spread but thin and likely <br /> represents waste that tumbled down the slopes during operation of the landfill. Complete <br /> removal of this waste will involve extensive disturbance of the existence dense riparian <br /> vegetation that covers the margins of the sloughs and the lower levee slopes. To avoid damage <br /> to the outer levee slopes and to the riparian vegetation cover a program of selective removal of <br /> wastes outside the landfill footprint is proposed. Staff will include the proposal in revised <br /> WDRs. <br /> 4. Storm water from the landfill northern part will discharge directly into Walker Slough and the <br /> rest will discharge to a sediment pond and overflow to French Camp Slough. Because this is a <br /> California Environmental Protection Agency <br /> 0a Recycled Paper <br />