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~~~a~ <br /> <br />September 11, 1035 <br />PACIFIC BASIN RESOURCES <br />A Division of Oxbow Carbon & Minerals, Inc. <br />Kathleen L. Sullivan <br />Colorado Department of health <br />1~ater Quality Control Division <br />Permits and E,riorcement Section <br />I:QCD-FE-B2 <br />400 Clterry Creek Drive South <br />Denw~r, CO 8022 -1530 <br />RECEIVED <br />SEP 15 1995 <br /> <br />II I IIIIIIII IIII III <br /> 999 <br />Divisan of ldmerals & Geology <br />RE: Toxicity Identification Er-aiuation (TIE) <br />°C-day Status Report <br />Fermit 1Jo. CO-0000132 <br />Dear Ms. Sullivan: <br />Enclosed is a Toxicity Identifioation Evaluation Phase I report <br />from Commercial Tenting and Engineering Company, as required by <br />Part I.B.k.(d). As previously- suspected, total dissolved solids, <br />TDS, predominately ~cdium bicarbonate, remains responsible for <br />the effluent toxicity. <br />Today, we received a telephone call from Mr. Jcn C. [Cubic, <br />Colorado D~pr.rtment of Pu61ic llealth and Environment, Water <br />Quality Corrtrol Division, regarding Amendment t1o. 4, modification <br />of WET testing protocol. Ha informed us, pcr instructions from <br />the U.S. Environmental Protection Agency, the amendment will <br />.3iscontinue testing with Cariodaphnia Dubin. He also advised us <br />to discuuti,iue ;:astiug with Cariodaphnia Dubin beginning with the <br />sample collected and shipped to CT&E today for the third quarter <br />monitoring. We will continue WET testing with fathead minnows. <br />If you Piave further questions or comments, feel free tc contact <br />TLumas C. Anderson, Environmental Coordinator, Scr„erset alining <br />Company at 1303) 929-5122. <br />S:ncer~ly, <br />Walter L. Wrigl;t <br />Mine Manager <br />cc: U.S. Environmental Pcotection Agency <br />Colorado Civision of Minerals and Geology <br />Corameivial Testi.ug and Engineering w;o report <br />Sanborn Creek Mine P.0. Box 535 Somerset, Colorado 81434 Pbone (970) 929-5122 Fax (970) 929-5177 <br />