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• <br />i:een observe:' since the start ~? mini ng. Sore of the nigher `otal suscended <br />solids levsis may result f-oa the mine disturbance, but sin=_ of trio h_gh <br />s~zsperded solids are thou;at tc .,_ natural. (,: ^SS concentration. cf '0,900 <br />r.:ajl wound not ~e unreascrabZe for ==runderstorn runc_`_' in a:. und_sturi~ed <br />ephemeral Ovate-shed.) T-re operaticr. does ha~~e r;m`f anti ,ed'.-.r=_nt control <br />p:ar. designed to the standards of tr,e reguiatia-rs. <br />Tte tetai dissolved solids concentrations :.micir Frave beer. o_`served during <br />JDera t_C'P.5 arm cirri lar to the pre-mining cencer.tra tes. The na:: imura aalue <br />of TDS (2,?~0 ma/1) :vas .recorded in X70 ,Name ~7uich prior o aininq within <br />t:rat Ova tsrshed. Va.i oes of oY. from t..".e surface F'3 tEr ~uncff have not teen <br />influenced ry mining to dat=. <br />Total iron and ma ro:~nese concentrations azs hither than pre-minine conditions <br />for some of tY.e ~?erationaI .moniterinc results. These concentrations are <br />probablu =ela-sd to the inc-eased to al susparded solids. Some of the higi~est <br />operational concentrations of iron and :manganese are thcucht to be natural, <br />u.•hiie some are li::elc to be the result of minion. <br />Continued sa:npline doing operations (Section. e.g ;,.' tare perrtet application) <br />has sh.ecan ttat_ c;a`.r in the tributaries drainir.a _ne .Nine siCe is unsuitable <br />for use as dr-n.kirc :,•a ter under primaru sod secondFr_~ standards. Srri gaticn <br />• standards for continuously used ::eater ere e::ceeded .`cr mo:yb9enum. _rcn, ant <br />occasionally manganese and Zithiu:a. <br />Past-min~ne quaZitu and quanti to are exoectr_c r_o be sim':ar to pre-minincr <br />ccrditicns. Tile applicant used the same carve number in runoff ,-olcuZat_ors <br />.._ the rec_aireed ar.3 the pre-mining surface. An_: initial t=ndencu z`or <br />'nereased rvnoff c+'oc13 be offset by the use of contour furro:/'ng on the <br />reclaimed :;urfac°. <br />^he post-Wining scr_ace c.~ater quaffit~ is e:cpected co be close tc the pro-.mining <br />surface water quality within a few years after miring. H_`rher scspended s::iids <br />would be e:cper_ted in t:~e surface runoff _`or a few years a_.-er mini au un.ti? _eveg- <br />ation cover is sufficient to reduce ~=rosion. The post-minion, ±-alues of ny ere <br />not e::rected to be sufficiently lower or hiel:er than the ,ire:;era or ri:e ~re- <br />mining valve. TJ`_31 _rOn CO.•ICent:aLlCns and manganese concentrations are li::ely <br />to continue to Le ralatirelu high at dries, as tt~ev !tau=_ bean du.ing the ere- <br />mininc and r_.perat'onal r,cnitorirg. <br />Foilowiro recZamai:inn springs could develop ir. t:he botco;n or.' dra-:.vges at the <br />downcradient eJntactnf mi;,ed and in.mined areas. Therefore, springs could <br />occur at several lo~-ations cr. the north s_dos o° t::e De=ringer and the crfield <br />P_ts when. these i.i`s are not conticuous with the Asimoro Pi ;:. These snriros <br />:/ili pct f-rm i,snediate:u uoca~ reeZam~tio.;. Assumir,? t`rat `_he _~ce cr _..•_harae <br />excc_ds aquifer discl:arrre .rcm ti:e pits, the sprils awifer ..i11 evenrua!hr <br />sa fora to and over--`icr/. Usi nc sn avera ce :e r•-ol.e lion _c to anrt avai Zable =oil <br />meist;:re ca paci tg, tiro appiica:a has estimated trot ~~~ `_0 1;000 ue.:rs will <br />• pass befora perccla tir;a .,a ___ .._11 netts rte the around wst-- <br />