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CC8tJ Go 1 d Mng . Co . _ ID•9-689-4040 <br />®oider /Igoelallss lna <br />200 Uniott Boultnotd. Suite 600 . <br />Iaee.~e. co usnao22e <br />Telopnmacsoa~o-o6eo <br />fa^po3)vea•2 <br />May 7fi, 1995 <br />Csi fPlc <Saak dt victor Cjold Mining CwupanY <br />2733 Sets FTighway 67 <br />Yiclur, CO 80860 <br />Aueatloe: Mr. John Hardaway <br /> <br />PmjectNo.~43-2847 <br />RE: REVIEW OF 7I~ LOY/ VOLUME SCll.ti tTUN U()LLECIION SYSTEM ACTION <br />LEAKAGE L1MIT RA'f7i.R <br />Dear John: <br />GtslOet Assoeietea hte. (Qolder) has evaluated the Low volume Solution Collectloa System (LVSCS) <br />Aafoa Leekslgs Betas (ALR's) for the PEase I Jiesp Leaeh Pad <br />BACKGROUND <br />A Sna leakage evabustat wu conductnl fw d~c Ptuaa f Pn".~t Puad le evehsera Eta Eteoretlrnl tttlw <br />tarts et¢eceed dtaing aottttal opatalag coadoioac. Lsas:age ratec wets alatlated toting tat:thods pioposed <br />by Guvud dt Donapatto (1989) mid Yee Zyl (1990), Cut dte evalurtlue of hsakage tleouyfi a sins hole ~ o <br />liner. 7be basic ptrmlae for all liner lash;e tanl$ plesentod herola ena the even if rareiW twestrocdoa <br />and qualhy assuraltce ere efaiutaiuetl dlu:tys liltet inataWtlhm, uaa hole par sere could NII be ptesmr its the <br />8eotyatbetic l6sr system at a well ccrosD7ttled ID1plpJi t^a 'st~°*'.o^ (Van ZY41990). <br />For modclingputposec, the 8eotnembtano wu ttsaumad m ba kneed between two laflattcly pcmtabk <br />media. Gimud ~ Sonaparm (1989) used BcmoulU's equation for free flow ttuouys sn orifiec to rsleulatc <br />the flow throngb the primary ileac u folfoMS: Q = Ca A 2gk <br />Equation [I) <br />wfinie• <br />Q - Flow tam Iiwugb holu (tn~!a) <br />Ct,- Nametic CuaFCirimt(o.d) <br />A - Atw uChole (mt) <br />g - Aeesl•tation dw to pavlty (m/a~ <br />b ~ Depth of fluid (tn) <br />Based on the above equation, leetcege ti+ron;h the Utter is wntrolled by the following puameters: <br />• Cheratxaisdoa of rho undvlYkb materiel; <br />• Deptb of fluid or hydraulic head; snq <br />• Number end mea of defects. <br />The underlyin8 material was essamed m be ktlaitrly prnnesble. A Low Volume Solution Collecdon <br />System (LVSC5) is present so that acts aolutioa wllectcd above the wmposlte liner system would be <br />pumped nut and the bead on the wmposite Baer system would be minlmiud, <br />In devokphg the 1.f'A bnc{~nund docomrnt on lino leakage fm solid waste fa~;litics, Blllls{/N lC c~ el. <br />(1987) recommendtsi t.4m a defect witL a diameter of 2 ntm be appropriate for astimtaltl4 ALR'a ae a teauh <br />of flow into the lcdagc celltsd~a layer nude typlcai uNe~eliua wuditiutu. <br />JUN 1~5 20:25 No .012 P.04 <br />OFFIC~BINAUaTRALiA C1~NM/~ GERI.tnNY. NUNG.4Rt. (fALV. SWEDEN. UNITED KWGCOM. JNITEDSWTEB <br />