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- 10 - <br />listing the monitoring data in this fashion, the data can quickly <br />and easily be scanned, for any trends or variations in the data <br />set. Also, each time the current year's monitoring results are <br />added to the list, this data can quickly be compared to previous <br />year's data and yearly summary tables and plots of particular <br />parameters of interest can easily be generated or updated. This <br />method of reporting is somewhat repetitive in that the same raw <br />data is available in the quarterly hydrologic monitoring reports <br />that Empire is required to submit to the Division. However, it is <br />much more efficient, in terms of review and evaluation of the data, <br />if it is all located in one document. <br />3. On page 6 of the report, Empire indicated a desire to eliminate <br />selected chemical parameters (listed in Table 43) from the <br />hydrologic monitoring program. Evaluation of this request will be <br />made through the Technical Revision process once the water quality <br />data are compiled into chronological lists (as discussed above) in <br />the upcoming annual hydrologic report. <br />4. Minor discrepancies in two of the summary tables were noted during <br />the review. In Table 8 (page 1 of 2), the mean TDS concentration <br />is reported as 430 mg/L, but the range is reported as 66 to 292 <br />mg/L. In Table 20 (page 1 of 2), the mean pH for 62 samples is <br />reported as 7.75, but the range is from 7.75 to 9.72. A specific <br />response to these discrepancies is not required; however, Empire <br />should be aware of them in the event these tables are used in the <br />future. <br />Since this is the first Annual Hydrologic Report to be submitted to <br />the Division for this operation, a fairly thorough review of the <br />report has been made. It is intended that EEC will consider the <br />approaches to data analysis and interpretation outlined in this <br />document for upcoming Annual Hydrologic Reports. For future Annual <br />Hydrologic Report submittals, the Division requests two copies (one <br />working copy and one file copy), and two copies should be sent to <br />the OSM Western Technical Center. <br />If there are any questions, comments or if any errors are noted in this <br />review, please bring them to our attention. <br />Si erely ~ <br />Jo, eph W. Oliver <br />clamation Specialist <br />JWO/fw <br />cc: Mr. Richard Holbrook, OSM (w/enclosures) <br />Doc. No.7985 <br />