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• Monitor compaction lifts, compaction equipment in conjunction with contract soils Formatted: Font: 11 pt
<br />engineer.
<br />• Soils engineer to observe, segregate suitable embankment material, and test placement of
<br />embankment fill during construction.
<br />Clay Material Segregation, Sub Base Construction, and Gco,ynthcUc Clay Liner
<br />ln,tallaUonr „n • Performed by contractor, monitored by Mill Superintendent and /or Owner's Engineer.
<br />• Soils engineer to segregate suitable clay for sub base as ree ulred4ne i; t4ef+t r while
<br />observing placement of embankment fill during construction.
<br />• Grade top of suh ba,, t IR)r lifrei- on interior slope and bottom of impoundment ( +/- I”) on
<br />50' grid. - • Monitor rkry I+nersub basr. ems, compaction equipment in conjunction with
<br />contract soils engineer.
<br />• Suh base is compacted on -site soils to 9515 standard proctor. +/- 2ch optimum moisture.
<br />• Finished surface shall be firm and Unyielding, �lding, Xs Ithout abrupt elevation changes, voids,
<br />cracks, ice or standing water
<br />• Liner material contractor gill inspect the sub ba,e prior to commencing installation
<br />• Soils eRg:ReeF to test placement of clay liner aEt ap duFiRg nSt.
<br />• On n,i a f ' cnr' Liner material
<br />contractor will install and te,t the geo,�nthcuc clan liner in accordance with
<br />manufacture's recommendation,..
<br />• The liner material contractor \N ill inspect a known perched aquifer seep approximately
<br />four -ft above the bottom of the TSF floor and employ one of the techniques belo�N. or
<br />equi,alent,to minimize premature hydration when layim�g =eosynthet:c clay liner oNer
<br />-
<br />the seep area.
<br />• No special procedures:
<br />Seep has minimal flow (damp, dry) or the seep flow -is controllable with F
<br />standard pumping techniques, (- nummving standing «atcr) and no
<br />additional liner installation techniques required
<br />• vi,clueen liner below seep:
<br />• Seep flow is controllable with standard pumping techmque,(minimizing
<br />standing water), but flow from the seep ma? cause hydration of the
<br />-cos clay liner below the seep faster than desired.
<br />• Visgueen or equity alent liner placed from the seep to the TSF floor,
<br />reducing hydration of the GCL material and directing seep flow to the
<br />TSF floor for control by standard pumping technique
<br />• Subdrain along seep:
<br />• Seep flow i, not controllable n ith standard pumping techniques
<br />(standinL, \,,atcr).
<br />• Installation of suhdram along seep, directing water from seep to an
<br />infiltration area within the TSF ,tructUrc a, shown in Figure C -7,
<br />Subdrain Detail and Figure C -3, Subdrain Location.
<br />i
<br />M1990 -057 -` teas Alav 14, 2013!,
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