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Mr.R.M. Jones <br /> -2 - - <br /> 15 April 2004 <br /> `Closure and Post-Closure Maintenance <br /> to flus letter. Standards for Disposal Sites and Landfills'is attached <br /> 4. The plan should be revise install a one-foot thick low-hydraulic conductivity layer compacted <br /> to 1 X 10-1 cm/sec or an equivalent alternative as a contingency if contamination is detected in <br /> underlying soils. The low-hydraulic conductivity layer to be installed above the compacted fill <br /> and below the vegetation layer. <br /> 5. The plan proposes to use onsite soils as fill for the reclamation of Pond 1. The plan needs to be <br /> revised to include testing for and exclusion of soils that are contaminated with high levels of <br /> TDS, chloride, or sodium. DI WET analysis of soils should be compared with concentrations <br /> in background soils or with background groundwater. <br /> If you have any questions please call me at (916) 255-3814. <br /> Ross Atkinson <br /> Associate Engineering Geologist <br /> Attachment <br /> cc: Mr. Jeff Wong, Environmental Health Department, San Joaquin County, Stockton <br /> Mr. Pat Riddle, Law Offices of Patrick D. Riddle,Acampo. <br /> Mr. Ery Rifenburg, Foothill Engineering, Lodi. <br /> C..\mydocum is\victo fw&\CloP1nl.dw <br />