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4th Quarter/December Monthly Report <br /> Page 5 <br /> low flow class. In comparison to the December 3 , 1997 sample <br /> result, the 571 ug/1 is higher (571 ug/1 verses 527 ug/1) but <br /> the flow was also lower (117 cfs verses 95 cfs) which would <br /> lead to a prediction of a higher zinc concentration. <br /> Since the index value is less than +2 . 0, Sunnyside does not <br /> plan any additional monitoring or re-analysis. <br /> The 12 period moving average of index values for dissolved zinc <br /> at A-72 (graph attached) dropped to +0.32 in December. This <br /> drop is small (+0. 36 to+0. 32) and is probably due to annual <br /> variations in hydrology. It is still well below the critical <br /> value of +0.577. <br /> If you have any questions on this report, please contact me. <br /> I certify under penalty of law <br /> that I have personally examined Sincerely, <br /> and am familiar with the information <br /> submitted herein: and based on my <br /> inquiry of those individuals <br /> immediately responsible for Larry Perino <br /> obtaining the information, I Reclamation <br /> Manager <br /> believe the submitted information <br /> is true, accurate and complete. <br /> I am aware that there are significant <br /> penalties for submitting false <br /> information, including the possibility <br /> of fine and imprisonment. See 15 U.S.C. <br /> Section 1001 and 33 U.S.C. Section 1319 <br /> cc: EPA - Melanie Pallman <br /> EPA Region 8 (8ENF-T) <br /> DMG - Wally Erickson, <br /> Allen Sorenson <br />