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<br />COLORADO D/SCHARGE PERAf1T SYSTEAf (CDPS) <br />AMENDA4ENT NO. 5 (M/A'OR A90DIF/CAT/ON) <br />SUMMARY OF RATIONALE <br />T{i'ENTYAfILE COAL COMPANY <br />FOIDEL CREEKAf/NE <br />CDPS PERMIT NUMBER CO-0042161, ROUTT COUNTY <br />1. TYPE OF PERMIT <br />ll. FAC/LlTY /NFORAfAT/ON <br />A. Fncilily Type: <br />Fee Category: <br />Ann«nl Fee: <br />B. Leg«l ConlncC <br />Minor Mod~cntion <br />Coral Mining, Mine Water &/or Prep Plant <br />Category 02, Subcntegorp 2 <br />$612 <br />William /r9~, Mine Mrrrrnger <br />295/5 Roult Cmrrrp~ Ranrl 27 <br />Orrk Geek, CO 50467 <br />(303J+879-3800 <br />C. Facility Conlncl: Richard Mi1Lc, Supen•i.cnr, Enrimnmentn! Affairs <br />29515 Roue Cmrnp• Rnnd 27 <br />Onk Creek, CO 80467 <br />(303J+879-3800 (FAX (.?0?J+879-1997) <br />D. Fncilily Location: <br />/n the SNr //4, SE 1/4, Section 29, TSN, R86W. <br />III. PURPOSE OF AAfEA'DA4ENT <br />In n letter doted Decetnher 22, 1993, the pernrittee requested a permit mnenr/ment m authorize use of three new <br />chenricnlc in wnsre>rnter trennnent jot the system that rlisdrnrges through outjnll 00/. The three chemicals rare: <br />EN-CH£Af 901 S, EN-CHEM 9307 rand NALCO 8573 (which r,~nulrl 6e n.ced ns rats nhernnte jot EN-CH£M 9307J. <br />EN-CHEM 90/5 is nn nhunitrum chloride based flocculent. 77re only enviranmetrtn! darn provided hr the Material <br />Snfero Dntrr Sheer (A9SDSJ is the LCso value far fathead nrinnoi,~, which i.e 700 mg/P. Tltir chemical nppenr:c .cafe far <br />rice ac intended. The permit already requires dissolved aluminum nvnrrimring when a chemicn! containing nlnminum ix <br />being u,cerl. This moniroring requiremetrt war npprv „-/sera this prodrret i.c in rr.ce. <br />£N-CHEM 9307 i.e a copalyncr~~lnmirle/sodium ncn~lnre anionic polymer. Although there i.r little nsefid environnrentnl <br />darn in the MSDS jar rhi.c chemicn/, it appears .rnfe jar use n.. intender/. Alcn, it i,c ,cnnrewhrrt .cimilnr m the third <br />efrenucnl for which nuthorizntiwr i.c sought (cee 6elmrJ. Tlrm chemicn/, NALCO 8873, hoc acute LCy~ dnln that show <br />that it should be .rnfe jot use, aLeu. <br />NALCO 8873 i.c nn ncrvlnmide/ner)~Inte Which ennrnin,c I to 5`7o edvandnrerl nclvlphennl rant/ 20 to 40`70 hyrlmn•enrerl <br />ugly rii.rti!late.c. The ncure LC„t far rainbow trout i.c greater than 1,000 mg/P asst/ the acute LCya jar daplrnin i.c 280 <br />n;1/P. On the bn.ri.c of drece darn, this chemicn! nppenrc .rnfe for u.ce. <br />