Laserfiche WebLink
---- ------- ........ <br /> November 14, 1979 <br /> 0}eCt 116-1 .1 <br /> _ 2 _ <br /> achleve the desired compaction.: The reS.11, tip.c clay liner measured /0 feet l_ <br /> in length; 15 feet in width-and a maximum 5 feet h, thickness. Cii: ;Gent <br /> compactiv:: effort was applied t7 gC percent of maximum density at <br /> optimum moisture content 2 percent. Prev;i­ s soil testing..or. clay soil <br /> From this site indicates the liner wi i l have permeahi i i ties in the rang <br /> of 10-0 cm/sec at this density. <br /> Fsllowing construction of the clay liner, the perimeter drain trench :ras <br /> ke=excavated around the clay liner, compacted and filled with 2-inch <br /> (maximum) drain 'rock. The extra vc red :i ra in trench was under;a i n corp l ete l y <br /> by silty clay soil contain-ing no sand lenses. <br /> The following pages ront. in Dhotos taken during excavation and cons trocrion <br /> of the clay-soil liner and drain trench. <br /> We are hopeful that these corrective measures satisfy your concern regard- <br /> ing containment" of .Wastes within Disposal Trench #3• Further, we wish to <br /> express our appreciationfor your cooperation and request approval to use <br /> the trench .at,-your earliost:convenience. <br /> Respectfully submitted <br /> BETA ASSOCIATES <br /> Jack.. AcCollough <br /> JEM/am <br /> 7.4 <br /> cc: ,Mr. Jim Parsons, California Water Resources Control Board <br /> Mr, Clyde Cass, California Department of he.altil Services <br /> Mr. C. Leland Hail , San Joaquin Local Health District ,./ <br /> dBetac_ lssociates <br />