2002-05-13_PERMIT FILE - C1981018 (2)

Home Browse Search

• COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division Rationale - Page 3. Permit No. CO-0038024. IV. PACILITY DESCRIPTION B. Wastewater Treatment Description Discharge point 024 will consist of a vertical hole drilled to an underground sump that will collect water from longwall workings (the coal face). This water will be pumped out to the surface, and will eventually discharge to Red Wash or an unnamed drainage. Rip-rap will be used near the discharge point to reduce erosion. Treatment will be provided by the underground settling sump. There are two chemicals used during the mining process which might end up in the discharge: Solcenic-2 and limestone. Solcenic-2 is an oil used far testing equipment at high pressures. Limestone Sa used for coal dust suppression. Oil aad grease sampling will be required to monitor the presence of Solcenic-2: no additional monitoring will be required for the limestone. V. PERFORMANCE HISTORY A. Monitoring Data • 1. Discharge Monitoring Reports: This is a new discharge point, thus no monitoring data is available. 2. State Sampling: There are no state sampling results available for this discharge point. VI. TERMS AND CONDITIONS OF PERMIT A. Effluent Limitations In developing suitable effluent limitations, the Division must review all applicable standards and regulations and apply that which is more stringent. This review includes, but is not limited to, the water quality standard based effluent limitations, federal guidelines and standards (.40 CFR Subchapter N) and State Effluent Regulations (10.1.0). Such a review has been dose for the new discharge point. The applicable limits are the same as for 023, and are listed below. In the original Rationale it was determined that Best Practicable Control Technology (BPT) and Best Available Technology Economically Achievable (BAT) are applicable to this facility, as they are the most , stringent. These regulations are taken from the Coal Mining Point Source Category, 40CFR 434. The applicable sections within this regulation are Parts 434.42, 434.43, and 434.45 for active mining areas. For outfall 024, the storm water ezemption does not apply. . For a further discussion of the limits, see the original Rationale.