43 Primer o sus t ainability re P or t 2013 V a 0 3 V a 06 V a 04 V A 05 VA 1 0 VA 0 3 2 Km V A 06 V A 04 t a y oltita t ailing St or ag e F acilit y P iaxtla Riv er P iaxtla Riv er p r oc es s p lant the c ompan y of a 31 200 peso fne f or nonc omplianc e to a haz ar dous w ast e r egulation P rimer o and PR OFEP A lat er came t o t erms that the tailings w er e not c onsider ed haz ar do us w ast e and in early 20 13 a nominal fne w as paid An e xt ernal c onsulting frm inspect ed the sit e and c oncluded that the c orr ectiv e actions w er e suffcient and ther e had been no longt erm damag e t o aquatic lif e biodi V e RS ity and a Q u a ti C monit o R in G Sinc e 20 10 a thir dpar t y c onsultant En vir onmental C onsulting and T echnology i nc de C V has monit or ed w at er qualit y and aquatic lif e in the P iaxtla Riv er i n 20 13 the y monit or ed thr ee sampling stations L ocat ed upstr eam of the ar ea of infuenc e of T a y oltita villag e activities station V A 04 L ocat ed within the ar eas of infuenc e of the villag e of T a y oltita San Dimas station V A 06 L ocat ed fur ther do wnstr eam of T a y oltita San Dimas station V A 0 3 Habitats ar e clas sifed as Optimum Suboptimal Mar ginal and P oor T he EP A char act eriz es Suboptimal as adequat e t o maintain the populations of the epif auna and fsh ar eas while Mar ginal is les s than desir able f or their viabilit y EP A 200 2a i n 20 13 the habitat qualit y at station V A 04 w as cat eg oriz ed as Suboptimal unchang ed fr om 20 12 while the habitat qualit y at V A 0 3 and V A 06 stations declined fr om Suboptimal t o Mar ginal Gener al pH v alues fr om all stations and sampling fr om 20 10 and 20 13 r ang ed ar ound 7 3 T he hist orical a v er ag e c onc entr ation of dis solv ed o xy g en DO is 7 4 7 mg L and the a v er ag e fo w v alues at all stations is 6 0 7 m 3 sec Not withstanding the decline in habitat qualit y o v er 20 13 station V A 0 3 r ec or ded the highest v alues of richnes s and abundanc e During 20 13 s sampling 85 7 5 or g anisms w er e c ollect ed i nsects r epr esent ed mor e than 90 of the macr o in v er t ebr at es T he abundanc e of fsh w as lo w er than in pr e vious surv e y s 20 10 thr ough 20 13 which ma y be due t o climatic c onditions as the study w as c onduct ed af t er the r ain y season had ended mine C l o S u R e and R e C lama tion E v ery mine has a fnit e lif e As mining pr oc eeds at San Dimas w e c ontinue t o updat e our plans f or the mine s e v entual closur e T he C ompan y has ac crued a dec ommis sioning liabilit y c onsisting of r eclamation and closur e c osts f or the San Dimas mine and is r epor t ed in our fnancial stat ements T her e w as no pr ogr es siv e closur e activit y in 20 13 at San Dimas and w e e xpect t o r esume r emediation of the hist orical San Ant onio tailings in 20 15