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is Blue Mountain Energy, Inc. WWTP Water Quality Assessment CO-0038024 sole known point source contributor to the unnamed tributaries to Red Wash and Scullion Gulch. No other point sources were identified as dischargers to the unnamed tributaries to Red Wash and Scullion Gulch. Thus, the findings of this assessment indicate that there is no dilution and that the assimilative capacities for most pollutants of concern are equal to the in-stream standards. Red Wash and Scullion Gulch are tributaries to the White River. Because there is no total residual chlorine or ammonia standazd for these tributaries, the downstream water quality standazds for these pazameters in the White River are applicable. The ratio of the low flow of the White River to the Blue Mountain Energy, Inc. W WTP combined design flow is 170:1. Thus, assimilative capacities in the White River are extremely high due to the large dilution. Information used in this assessment includes data gathered from Blue Mountain Energy, Inc., the WQCD, the Colorado Division of Water Resources (DWR), the U.S. Environmental Protection Agency (EPA), the U. S. Geological Survey (USGS), and communications with the local water commissioner. The data used in the assessment consist of the best information available at the time ofpreparation of this WQA package. II. Water Quality I The Blue Mountain Energy, Inc. W WTP dischazges to the Water Body Identification (WBID) stream • segment COLCWR13a, which means the Lower Colorado River Basin, White River Sub-basin, Stream Segment 13a. This segment is composed of "Al] tributaries to the White River, including all wetlands, lakes and reservoirs, from a point immediately above the confluence with Piceance Creek to a point immediately above the confluence with Douglas Creek, except for the specific listings in. Segments 13b through 20." Stream segment COLCWR13a is classified for Wamt Water Aquatic Life Class 2, Class 2 Recreation, and Agriculture. Red Wash and Scullion Gulch ultimately flow into Kenney Reservoir, which forms a portion of the White River in an area approximately four miles northeast of Rangelg CO. The White River and Kenney Reservoir aze within WBID stream segment COLCWRl2, which is composed of the "Mainstem ofthe White River from a point immediately above the confluence with Piceance Creek to a point immediately above the confluence with Douglas Creek, including Taylor Draw Reservoir." Numeric standazds are developed on abasin-specific basis and are adopted for particulaz stream segments by the Water Quality Control Commission. To simplify the listing ofthesegment-specific standards, manyofthe aquatic life standards are contained in a table at the beginning ofeach chapter of the regulations. The standards in Tables A-2 and A-3 have been assigned to stream segments COLCWR13a and COLCWRI2 respectively in accordance with the Classification and Numeric Standards for Lower Colorado River Basin. An amendment to the Classifications and Numeric Standards forlower Colorado River Basin that becomes effective on February 20, 2002, will change the applicable standards for stream segments COLCWRI2 and COLCWR13a. This WQA has been developed in conformance with the water quality standazds that will become effective on February 20, 2002. • Appendix A Page 3 of 15