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Third Patty Oversight 9 Water, Waste & Land, Inc. <br />San Luis Mine January 10, 1993 <br />1 <br /> <br /> <br /> <br /> <br /> <br />I <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />_~ <br />3.0 RAISE I EMBANKMENT <br />3.1 MATERIALS SPECIFICATIONS <br />The design intent and key geotechnical issue associated with the Raise I Embankment <br />!'/Z'9Y <br />are discussed in Section 2.2. The original material specifications, contained in the design h~o't< ~~ <br />report (SRK, 1993a), were formally re~i f ~ y BMRI after the DMG inspection, and were rOr' ~ r~_ <br />!"~' <br />documented in the Construction Status Report (SRK, 1993b1. According to the Construction ~ 7`G.,-: <br />Status Report and personal communications with field QA personnel, revisions to the t~v...c tR-!~ <br />sf~Y/ bar~~vy(~/" i <br />specifications were required as gradations of available construction materials did not fall yF Vr ~:v LA' <br />within the original Phase II Raise I Embankment specifications. The original and revised r`'-~'`"~"~ <br />~wc.~lRt I <br />materials specifications for the Phase II Raise I Embankment are shown in Tables 3.1 and 3.2, a~:F f' <br />A visual comparison of the original and revised specifications is shown in Figun: 2. <br />Table 3.1 Type 1 Material Specification Summary <br />Specification Item Original Design <br />Specifications Rtivised <br />Specifica[ions <br />Maximum particle size (inches) in direct contact with <br />the VLDPE liner 1 X 1 h <br />Maximum particle size (inches) elsewhere 3 6 <br />Compaction density 1°h of maximum dry density) None 85 <br />Lift Thickness (loose) Iftl None 3 <br />Table 3.2 Type 1 Particle Size Specifications <br />U.S. Standartl Sieve Size Original Design Specifications <br />(% Finer by Weight) Revised Specifications <br />(% Finer by 6Neight) <br />~Ys inch > 65 > fi5 <br />#4 45 - 95 45 - 9!i <br />#10 25 - 65 N.A.' <br />#40 5 - 30 35 - 90 <br />#200 <10 <35 <br />' N.A. -not applicable <br />~J <br />