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o, c~ <br />MR. ROBERT J. SHUKLE <br />NOVEMBER 12, 1985 <br />PAGE TWO <br />metal concentrations in the same water sample. The mathematical relationship <br />was obtained through linear regression analysis of data from the 38 water <br />samples. A similar analysis was used for mercury. This relationship was used <br />to establish what the total recoverable metal values would have been at CYCC's <br />discharge points had total recoverable metals been sampled. <br />The attached analysis lists all the total metal daily maximum excursions <br />for CDPS Permit CO-0027154 from March, 1984 through September, 1985. Corre- <br />sponding total recoverable values have been estimated for these excursions. <br />Using the estimated total recoverable data reduces the number of silver excur- <br />sions from 28 to 17; the number of zinc excursions from 4 to 3; the number of <br />iron excursions from 4 to 1; the number of copper excursions from 6 to 0; and <br />the number of mercury excursions from 2 to 0. <br />Sincerely, <br />Kent A. Crofts <br />Environmental Manager <br />KAC:kmk <br />cc: R. Tifft <br />J. Hendrickson <br />R. Hughes <br />T. Johnson <br />D. Mathews <br />J. Scherschlight <br />M. Day <br />