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California RegionalQuality ontrol oar <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Dr.Alan LloydArnold <br /> Secretaryfor Sacramento Main Office Schwarzenegger <br /> Environmental 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Governor <br /> Protection Phone(916)464-3291 •FAX(916)464-4775 s to j,� j()A OU 1 H C;0 U H T Y <br /> http://www.waterboards.ca.gov/centralvalley E N V I R 0 H M E N T A L <br /> HEALTH DEPARTMENT <br /> 24 May 2005 <br /> Mr. Kevin Basso <br /> General Manager <br /> Forward Inc. <br /> 1145 West Charger Way <br /> Stockton, CA 95206 <br /> WORK PLAN IN RESPONSE TO NOTICE OF VIOLATION-LEACHATE SEEPS IN AUSTIN <br /> ROAD UNIT, FORWARD LANDFILL, SAN JOAQUIN COUNTY <br /> Central Valley Regional Water Quality Control Board staff(staff)have reviewed the Work Plan in <br /> Response to Notice of Violation—Leachate Seeps in Austin Road Unit(Work Plan) and has the <br /> following observations and comments: <br /> 1. The Work Plan complies with staff's request for a plan to prevent infiltration and protect the foot of <br /> the landfill from overflow from Littlejohns Creek by 15 May 2005. <br /> 2. The Work Plan proposes to install a French Drain at the foot of the landfill slope to collect future <br /> leachate releases. The French Drain will consists of a geonet blanket on the side slope, leading to a <br /> gravel drain at the toe of the slope. The French Drain will discharge by gravity to a holding tank and <br /> collected leachate will either be subsequently discharged to an appropriate facility or to the on site <br /> leachate collection pond. A Flexible Membrane Liner(FML)may be installed under the gravel <br /> drain and approximately 24 inches up slope. <br /> 3. The Austin Unit has a know plume of contaminated groundwater associated with it. Most of this <br /> contamination is caused by a landfill gas release, however if we don't control future leachate <br /> releases the plume will never be cleaned up. Installation of the optional FLM will likely prevent <br /> future releases of leachate to the vadose zone and ultimately to groundwater. Staff concurs with the <br /> French Drain design with the optional FLM. <br /> 4. To protect against future flood events, a soil berm will be completed along the west face of the <br /> Austin Unit. In the future the perimeter road will run on top of this berm. <br /> 5. Before finalizing the flood protection berm Forward should investigate the magnitude and frequency <br /> of high flow events in Littlejohns Creek due to releases from the upstream reservoir combined with <br /> heavy rain events. Staff concurs with the flood protection berm design but lets make sure the berm <br /> is high enough. <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/rwgcb5 <br />