Laserfiche WebLink
PART I <br />Page No. 15 <br />Permit No.: CO-0000213 <br />ii. The PTI/T1E results indicate that the identified toxicant(s) represent pollutant(s) that may be controlled with <br />specific numerical linuts and the permit issuing authority agrees that the control of such toxicants through <br />numerical limits is the most appropriate course of action. <br />iii. The PTI/TIE reveals other unique, conditions or characteristics, which, in the opinion of the permit issuing <br />authority, justify the incorporation of unanticipated special conditions in the permit. <br />5. Storm Exemption -Facilities Permitted to Discharge <br />If the permittee intends to use the 10-year, 24hour storm exemption, a report must be submitted to the Division within 90 <br />days after the effective date of this permit, documenting that the facility is designed, constructed and will be maintained to <br />contain or treat: <br />a. The maximum volume of wastewater which would be generated by the facility during a 24-hour period without an <br />increase in volume from precipitation; and <br />b. The maximum volume of wastewater resulting from a 10-year, 24-hour precipitation event, including the volume <br />which would result from all areas contributing runoff to the individual treatment facility (i.e., all runoff not diverted <br />from the active mining area or the mill area). <br />In addition, if a discharge occurs as a result of the 20-year, 24-hour storm volume being exceeded and the permittee <br />wishes to claim an exemption from technology based effluent limitations, the permittee shall submit, within 5 days of the <br />said discharge,.documentation that the facility was maintained to contain or treat the previously specified volumes. The <br />pernuttee must also submit documentation of the storm event, including the precipitation recorded at the closest official <br />precipitation gauge station (or the petmittee's own gauge), the volume of runoff produced and the steps taken to maintain <br />treatment and minimize the amount of overflow. <br />For claiming a.storm water exemption, the permittee must also adequately demonstrate that all reasonable management, <br />containment, and treatment options have been optimally utilized. <br />The storm event exemptions are only applicable for the following parameters at this facility, which are based upon <br />Federal BAT/BPT limitations: <br />Total Suspended Solids <br />All data/documentation required by the section which can not be reported on applicable discharge monitoring report forms <br />(DMRs) shall be reported in a letter as an attachment to the DMR. Submittal of documentation of containment, <br />maintenance and precipitation records above does not exempt the permittee from the notification requirements of Part <br />II.A.4. of this permit. <br />6. Storm Exemption -Facilities Not Permitted to Discharge <br />If the permittee intends to use the 10-year, 24-hour storm exemption, a report must be submitted to the Division within 90 <br />days after the effective date of this permit, documenting that the facility is designed, constructed and will be maintained to <br />contain: <br />a. The maximum volume of wastewater which would be generated by the facility during a 24-hour period without an <br />increase in volume from precipitation; and <br />b. The maximum volume of wastewater resulting from a 10-year, 24-hour precipitation event, including the volume <br />which would result from all areas contributing runoff to the "zero discharge" area or process (i.e., all runoff not <br />diverted from the area or process subject to the zero discharge). <br />In addition, if discharge occurs as a result of the 10-year, 24-hour storm volume being exceeded and the permittee wishes <br />to claim an exemption from technology based effluent limitations, the permittee shall submit, within 5 days of the said <br />Attachment 2.05.3(3)-18-19 <br />