2014-08-20_HYDROLOGY - M2013040 - Laserfiche WebLink

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CERTIFICATION TO DISCHARGE UNDER °'.C CDPS GENERAL PERMIT COR340000 STORMWATER ASS y OCIATED WITH SAND&GRAVEL MINING&PROCESSING ft *r 7s* Certification Number:COR341719 Colorado Department This Certification to Discharge specifically authorizes: of publics and Environment Richard Fretterd to discharge stormwater from the facility identified as Godsend lode claim to: Crystal Creek-South Platte River Facility Located at: ECR 3 and CR 51 near FS201 uninc Teller County,CO Center Point Latitude 39.022221 Longitude-105.294239 All discharges must comply with the lawful requirements of federal agencies municipalities,counties,drainage districts and other local agencies regarding any discharges to storm drain systems,conveyances,or other water courses under their jurisdiction. Monitoringt Requirements Monitoring Sample Parameter Units Benchmark Values Rationale Frequency Type Total Suspended Solids(TSS) mg/L 100 EPA Benchmarks Quarterly Grab Additional Monitoring Reauirements On the effective date of this certification,the Godsend lode claim facility is subject to the monitoring requirements discussed below at each discharge point of stormwater from the facility. Monitoring frequency:The permittee must collect samples of stormwater discharge from the facility once per quarter unless otherwise directed by the Division. Measurable Storm Event: For this certification,monitoring is only required once per quarter,regardless of the number of measureable storm events. However,if additional samples are collected during the quarter,these additional samples must also be included in the DMR summary as described below. • Rain event.Permittees must conduct monitoring,as specified in the Monitoring Requirements table above,on a storm event that results in an actual discharge from the facility(measurable storm event),and that follows the preceding measurable storm event by at least 72 hours(3 days). • Snowmelt event.The permittee must conduct snowmelt monitoring at a time when a measurable discharge occurs from the facility. Storm Event Information • Rain event.The permittee must document the information below for each monitored event. i. The date,time of the start of the discharge,time of sampling,duration(in hours)of the rainfall event,and magnitude(in inches)of the storm event sampled; ii. The duration between the storm event sampled and the end of the most recent storm event that produced a discharge. • Snowmelt monitoring.The permittee must document the date of the sampling event for each monitored Snowmelt event.