Laserfiche WebLink
COLORADOOFPARTAff.NF OF PUBL/CI~.ILTXONAtENNf, Winer ~atiry CauralDi`itfort • -' <br />Ratlanate -Page 4. Permit Na. COGSaPOW <br />b. Salinity, or Total Dissolved Solids (TDSJ is an issue in the Colorado River Basin. Regu/atlon 39, "Regulations jar <br />Implementation ofthe Colorado RiverSaliniry Standards through the Colorado DischargePermitProgram,"addresses the <br />dirchargeojTDStotheColoradoRiverBasin. TheregulationrequiresthatthesatinityofeachdischargetotheColorado <br />River Basin be evaluated jar impact on the system. <br />7DS will be included rn the monitoring jar dischargers in the Colorado River Basin, however, lrmits will not be imposed. <br />The Division does reserve the right to impose limits on permitiees if the TDS levels are determined to be detrimental or <br />endanger the beneficial uses ojJhe waters. IJTDSmonitoring is arequirement ojthepermitthen itshall beincluded within <br />the terms and conditions ojihe individual Cernftcation Rationale ofthe permit. Additional monitoringjor TDS shalf be <br />included on the Discharge Monitoring Reports (DMRJ and shall be subject to the permit's monitoring and reporting <br />requirements. 1DSsampling shall be on o quarterly basis, taken as o grab sample. <br />Where, based on a minimum ojS samples, the permittee demonstrates to the satisfaction of the Water Quality Contra! <br />Division that the level ojTDS in the ejjluent can be calculated based upon the level ojelectrical conductivity, thepermittee <br />may measure and report TDS in terms ojelectn'ca! conductivity. <br />c. Phosphorus: Due to the effects ofnutrient loading in drinking waterslorage reservoirs, (algae blooms, taste and odor <br />problems, oxygen depletion) variousphosphorus regulations have been developed to track the loading in the affected <br />basrns. Therefore totalphosphorus(asPJmonitoringisrequiredjorjacilitieswhichdischargeprocesswaterintothe <br />following droinage basins: Cherry Creek basin, Chatfield Reservoirbasin downstream ofthe USCSgage at Waterton <br />and on Plum Creek; Dillon Reservoir basin (tie. Ten Mile Creek SnakeRiver, BlueRiver, all tributaries to the Dillon <br />Reservoir), and Bear Creek basin. The Division also reserves the right to include phosphorus monitoring for any <br />receiving waters that may later enter intophosphorus monitoring requirements, orjorfacilities that usephosphorus <br />chemicairjor treatment. Ijphosphorus monitoring is a requirement ojrhepermit then it shall be included within the <br />terms and conditions of the individual Cernfuation Rationale ojthe permit Additional monitoringfor phosphorus <br />shall be included on the (DMl{) and shall be subject Jo the permit's monitoring and reporting requirements. <br />Phosphorus sampling shall be an a monthly basis, taken as a grab sample. <br />d Graphite: Jn the case ofgraphite mining, the federal effluent guidelines (40 CFR 436.382) call for a limit for Total <br />Iron. Since the Division has Water Quality Standards in many areas of the state, which may be stricter than the <br />federal limits, coverage ofprocess water discharges from this type offaciliry must be under an individual permit. <br />B. StormwaterDischarees <br />I. Stormwater vs. Process water <br />When stormwater mites with process water, theprocess water limitations (Part I.B ofthe permit) apply to the discharge of <br />that mixed water. The stormwater section (Part I.C of the permit) is intended to cover those portions oja nonmetallic <br />minerals production operation (except fuel) that are not already subject to effluent limitations under 40 CFR 436, and to <br />coverstormwater runofffrom asphalt and concrete batch plants. <br />1. StormwaterManarementPlan /SR'MPl <br />The stormwoter regulations primarily apply to areas not covered by 40 CFR Past 436. They require permitiees to develop <br />and implement a Stormwate~ Management Plan (SWMP) to protect the quality ojstarmwater leaving the site. The plan <br />shall identifypotentialsaurces ofpollution (including sediment) which may reasonably be expected to affect the quality of <br />stormwater discharges associated with mining activity. In addition, Jheplan shall describe the best managementpractices <br />(BMPs) which will be used to reduce the pollutanu in stormwater discharges from the mining site. <br />Some activities required under the SWMP may already be in place. However, the SWMP will require the permiaee to <br />coordinate there activities with any necessary new activities in an orderly manner, so that the resu/t is Jhe reduction or <br />eliminationojpollutantsreachingstatewatersfromareasnorlimiredbyejjluentlimitaNonr. Facilitiesmustrmplementthe <br />provirionr of the SWMP required under this part ae a condition ofthir permit <br />It is the permittee's responsibility to notify the Colorado Division ojMinerals and Geology (formerly the Colorado Mined <br />LandRec/amationDivisionJojanysign~cantchangeratlheirsiteresultingfromtheimplementationoftheSWMP. This is <br />so that the Division ofMtinera/s and Geology may review the SWMP and incorporate any potential revisions into the <br />facility's reclamation permit which might be needed. <br />The SWMP shall include the following items, at a minimum: <br />i <br />