Laserfiche WebLink
COLORADO DISCHARGE PERMIT SYSTEM (CDPS) <br />AMENDMENT NO. I -RATIONALE <br />CYPRUS EMPIRE CORPORATION <br />EAGLE M/NE COMPLEX <br />CDPS PERM/T NUMBER CO-0034142, MOFFAT COUNTY <br />L TYPE OF PERMIT <br />11. FACILITY /NFORMAT/ON <br />A. Faei/iry Type: <br />Fee Categories: <br />and <br />Tntnl Annua/Fee. <br />B. Legol Contact: <br />C. Facility Contact: <br />D. Facility Location: <br />/I/. PURPOSEOFAMEND,ilENT <br />Amendment <br />Industrial <br />Category 02, Subcategory 2 (Coa! Mining (A9ine writer, prep plant) ($6l2) <br />Category 24. Subcategory 1 Qndividual Industrial Smrmwnter -greeter than l0 <br />acres) ($300) <br />$91? <br />Michael W Ludlow <br />Genzral Manager <br />C~ prv.s Empire Corporation <br />P.O. Boz 6R <br />Craig. CO 81626 <br />(303)+824-8346 <br />Murcuc A. Middleton <br />Environmental Engineer <br />Cyprve Empire Corporation <br />P.O. Box 68 <br />Craig, CO 8 / 626 <br />(30.1,1 +824-8246 <br />Cypnr.c Empire Corporation's, (herenjier referred [o a.c CEC), Eagle Mine <br />Complex it located in Sections 30, 3/, and 37, Township h North, Runge 9l <br />Wer[ and Section 6, Township 5 North, Rangy. 9/ Wesr. <br />/n n letter dated Ocrober 5, / 994, the permi(tee has reyuected that the upper pH limitation for oulfiill 023 he raised from 9.0 <br />s. u. to 9.4 s. u. The ,system experiences excessive algal activity in the wanner months cnu.cing the pH to a{evu(e Auring (his <br />period. !t i,c likely [hat cherninrl control oj[he algae would interfere with the biological action in the lagoon,c and may <br />adversely affect other effluent parameters, nc H~e!/ ns adding pollumntc. Therefore, the ler.cer impact m [he receiving water <br />would be the elevated pH level. <br />The Division performed an erten.cive evaluation in l 983 to determine ijun increased pH at dri.c outjall would impact the <br />receiving water. No notable irnpnct was erpecred t/vough a pH oj9.7; therefore, the DR•i:;ion approved the change and <br />amended the limitation for ourjn/! 033 in 1984. {{'hen the permit was lost renewed in l 994', the need for this change N'as no <br />longer apparent bused on the review ajseljmonimring data performed a[ that time and d+e upper limitation wn.c returned m <br />9.0 s.tr. However, the justification for allowing the higher limitation remains valid. The perrnitlee again finds the need for <br />the higher pH limitation. On this basic, the permit x ill be amended. !n order ro avoid potential esceedences in the juure, <br />the limhntion N~ill be incren.ced ro 9.7 .r. u. Part /.A. 1. (cJ nn page iv of the permit will be wnended. This action is subject to <br />public police reyuirememc. <br />Jon C. Kubic <br />Jnnuurl• i 2, 1995 <br />