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COLORADO DEPARTMENT OF HEALTH, Water Qunliry Control Division Rationale - Pnge 17, Permit No. CO-0032638 F. Specific Compliance Requirements Submissions to the Division: The following are specific compliance items which require perntinee action. Please check the rejeremced parts of the permit for details an whet is required. Code Event Perinil Cilatioti : Due Dale 90603 One Time Analysis LB.3. First Lutnnce ojDischnrge 00503 Snlirtity Report I.A.S. September 1, 1994 90503 Materials Contair:ment Plan -Update 1. E. 1. 90 days after effective dote 90199 Stormwater Management Plan Annual /.E.2,n .First Report is due Reports February I5, 1995 Drafter: Date.• Revised by: Vll. PUBLlC NOTICE COAIAfENTS Alesartder S. Michni[idis (Science Applications Interrtnrionnl Corpornrion September 13, 1993 Jon C. Kubic Jnrtunry 21, 1994 77re peroitree and the CO Division of Minerals mtd Geology (GONG) submitted canments. 71+e permitree is concerned with classification ojourfnll 006 as a spoils spring because it is not located iu spoils. Funher, they believe that this oufnll should not be regulated under this permit because they believe that the discharge is naturally ncnu-ring. 77re term "spoils spring" was originated 6y the CDMG and has been somen•hnt generically applied to discharges from sprvngs shot discharge pollutmus to state waters only ar a result of the specific mining activities, whether r/rey occur in nreru ojspoilc or other areas. As a consequence ojsuch activities, spoils spring discharges ore similar in qunliry to mine drainage. In Bii.r specific case, the CDMG clnssifred this discharge as a spoilt spring discbnrge oral the Wnrer Qunliry Conant Dioisiar (!he "Division "J catcurs. This discbnrge coruain.r metals and other constituents at roncentrations similm' ro mhru i.r expected in mine drainage and, unless regulated, could impact state waters. The CDMG has determined that h is to he regu/nn•rl under Nre pennirree's mining permit. 71te Dirision intends fo continue to toll this discbnrge n "spoils spring" rlischm-ge and carat i+ wider this permit. 71re CDA1G umuaented rlrm .come sources of n•nstervater to certain ourfnlls hod been omi(led. Outfnll 002 includes nvuer from netiee mine spoils springs, outjnll 003 also includes spoils spring renters and oufa[l 004 includes renter from an noire niinRig pit. 171is is correlnrad by on inspection by n Dirision represenrnrive in September, 1991. As n resub, the rlrtft permit rnria+nle snvernenr (in section Y/. A. 6.c.J that the eJJlueru qunliry from autfnll004 is e_rpecred m be similar ro that fi~an ar fall ool is incorrect. Ocher statements in the snore section that ou jnl(s 002 and 003 no longer contain runoff from noire areas ore nfsu incorrect. The inaccuracies will be corrected. Recnu.ce of these conm+enrs, the Dirision reviewed the complete draft renewal perndt and rationale m+d nrnde reei.rions inhere npprnpr ante. Beaune of the contributions of spoils spring mrd/or mrne drairtnge to outjnll 002, 003 and 004, limitminns mere rerie~erl ro nc<'nutu for potemtinl imports to the instrenm stater qunliry stm,dnrds. We determined ji~om a revR'rv of recent discbnrge monitoring reports that omjnlls 002 acrd 004 do nor discbnrge daring the period from August rlnuugh February. 71te discharge volumes fran outjnlls 003 and 006 ore much lower during this period also. 77+errfure, rte rlerermined that it is appropriate to develop seasonal limirarioru far metals to snore ncarrnrefy correlnre rith dre n.rsimi(mive cnpacin~ of the remiving waters during these seasons. Although, discbnrge from o« lolls 002 and 004 frill not be prohibited during ,august through February, roe rvoulrl tint expect nrrv dischmrges to occur, dtis is assumed in the cfflnern liniiuuiun dcrerminmiou in this permit. Ijjuntre conditions change resulting in this nssuntptiun ro be no longer valid, it mm~ he nececam}~ ro reopen the pernrir to ntud~ limitaiutr.c mrd/nr caulirions ns appropriate.