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i <br />Sampling Frequency <br />The data printout was reviewed and the contents compared to the monitoring <br />schedule provided in Table 1 of the Annual Hydrologic Report. Copies of the <br />checklists are attached to this memorandum. Twentymile Coal Company completed <br />most of the required sampling for the 1986-1987 water year; however, a few <br />omissions were noted. These are itemized below. <br />Station 800 (U.S.G.S.) - Foidel Creek <br />The records for this site indicate missed data. Specifically, the following <br />measurements are missing: <br />Discharge- October 1986 <br />May 1987 <br />September 1987 <br />(January/February 1987- probably frozen) <br />Field Parameters- Octoher 1486 <br />December 1986 <br />February 1987 <br />May 1987 <br />September 1987 <br />Note: Two field parameter samples were taken each month during March and <br />June 1987; however, the annual total is only 9 of the 12 required samples. <br />Bicarbonate- November 1986 <br />April 1987 <br />Ammonia, free- June 1987 <br />Zinc and Phosphate, ortho are missing from the November 1986 analysis, <br />but they may not have been required parameters under the previous <br />monitoring plan. <br />Site 8 - Foidel Creek <br />Ammonia, free was missed for the June 1987 analysis. All other <br />requirements were met. <br />Site 16 - Fish Creek <br />All sample requirements were met. <br />Site 1002 - Fish Creek <br />All sample requirements were met, except ammonia, free was not analyzed <br />for the June 1987 sample. <br />