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.c-ar Quality Control Division <br /> 4Z10 cast llth .avenue <br /> Denver, Colorado 80220 <br /> SUMMARY OF RATIONALE <br /> WESTERN PAVING <br /> • STAGE - COACH STOP PIT <br /> _ 'iT NUMBER: CO-0038512 <br /> ADAMS COUNTY <br /> TYPE OF FACILITY: Minor Industrial (New) <br /> S. I .C. NO: 1442 <br /> LOCATION: Southwest 1Z of the Northwest c of Section 35, TownshiD I <br /> South, Range 67 West, approximatel.y } ;Wile north of <br /> Henderson, Colorado. <br /> CONTACTS: Frank Graham <br /> 1400 'West 64th .avenue <br /> Denver, Colorado <br /> (303) + 428-0300 <br /> RECEIVING 'WATER: South Platte River, Segment 15 <br /> CLASS: Recreation Class 2, 'Warm Water aquatic Class 2 , Water <br /> supply and agricultural use. <br /> DESIGN FLOW: 70, apm (100,00 ppd) <br /> FACILITY DESCRIPTION: The Starve Coach Stop Pit is a sand and gravel operation <br /> that produces 2000 to 3000 tons per day of sand and gravel , <br /> • a crusher is also used at the site. The pit is dewatered <br /> through the use of a pump. The outfall of the dewatering <br /> pump will be discharge point 001 as shown in figure 1 <br /> page 16 of this t)ernit. <br /> EFFLUENT LIMITATIONS: The e^fluent limitations for this permit are .outlined <br /> below. <br /> Parameter Limitation Rational <br /> Flow N/A Monitoring <br /> Oil and Grease 10.0 State Effluent Standards <br /> pH 6.5-9.0 South Platte River <br /> Water Quality Standards <br /> Total Suspended Solids 25/45 3est Engineerina Judgement <br /> Approximately 5000 gallons of fuel are stored on site in <br /> a mobiletanker. An SPCC plan will be required to address <br /> precautions to contain s.pills and notification procedures <br /> as requested on page o. <br /> This is an activity permit which allows the permittee, upon <br /> proper notification to the Division, to move or add discharge <br /> • points. The details of the activity permit are outlined <br /> on page 113. <br />