Laserfiche WebLink
~~i iii~~~rii~~ii ~~i <br />July 29,1999 <br />Ms. Coda Lenkey <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division - Pemtits and Enforcement <br />4300 Chevy Creek Drive South <br />Denver, CO 80722-1530 <br />000 <br />TWentytnlla Coal Company <br />28516 Rout! Coutfty Road # 27 <br />Oak Croak, CO 80467 <br />(870) 879.3800 <br />RBt pR.RMIT CO-^,.035584-• SF.[_OIV'D Qi RTR.R 1999 DbiR C b;iTrAi. <br />Dear Ms, Lenkey: <br />~~~ <br />RECEIVED <br />JUL 3 01999 <br />Division of Minerals 8 Geology <br />Pleax find endowed the above referrnced dixharge monimriag reports for;the period from Apa71,1999 through <br />June 30, 1999. One pentrit limitation exceedmce oceutred during the period. <br />The 30 Day Average for TSS (35 mg/!) was excreded fo; the month of April. The only sample taken for the month <br />at 42 mg/1 wan well below the maximum daily limit of 70 mg/1, but in exceedence of the 30 Day Average lunitation. <br />The samples taken for the following months of the quarter were well below both limitations, the qunrtcrly aveiwgc <br />was 15.7 mg/1, In the future if the first, and typically the only, sample of the month exceeds the 30 Duy Avta•agr <br />]imitation for a parameter additional sampling of that parwneter will be scheduled. <br />Quarterly Whole Effluent Toxicity (WET) tests were conducted for Outfall 001 the week of J une 14, 1999. <br />This site passed for both species, with "Concent[ations vnth Starisricelly Significant Difference in Lethality" reported <br />at 50°/s for P. Promelea and 100% for C. Dubin. Copies of the CDPS WET Test Report Forme for both species are utduded with <br />this submittal. <br />Outfell 001 ie being tested fox Hardness in addition to dre required parameters, A mpy of thox results ie included in this submittal <br />Pleex contact me at (970) 870-2730 for any further questions or additional infoanation. <br />Twentymile Coal Company <br />~oQ. <` OQ.»'lot~~ <br />J« Shoemaker <br />Environmental Specialist <br />enclosures <br />cc: DMG <br />CWPS Peanit No. CO-0035G84 file <br />