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COLORADO DEPARTMENT•OF H~TH <br />Water Quality Con[rol Division <br />4210 E. 11th Avenue <br />enver, Colorado 80220 <br />SUMMARY OF RATIONALE <br />CORN CONSTRUCTION L0. <br />PERMIT NUMBER: CO-0033863 <br />DELTA COUNTY <br />LOCATION: North Delta Pit - approximately 2 miles northeast of <br />Delta <br />CONTACTS: Thomas D. Rolland <br />P.O. Box 1240 <br />Grand Junction, LO 81501 <br />303+242-3380 <br />RECEIVING WATER: Gunnison River <br />CLASS: B1 <br />Effluent limited segment <br />DESIGN FLOW: Application is for dewatering a gravel pit near Delta; <br />• groundwater only with no process water. Est. Flow <br />100-600 gpm <br />Total Suspended Solids: 30/45 mg/1 daily max. <br />OIl and Grease: 10 mg/1 daily max. <br />pH; between 6.0 and 9.0 units <br />Quarterly sampling on TSS; weekly sampling on Oll and <br />Grease and pH; semi-annual reporting. <br />Discharge of overflow from a 10-year, 24-hour :storm (1.8 inches) <br />will be permitted. <br />Permit will expire March 31, 1982. <br />Paul Williamson <br />2-9-77 <br />• <br />