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<br />discovered. Inspections of 006 were conducted hourly from 2:30 p.m. until 5:00 a.m. on <br />February 22. Additional inspections were conducted throughout the day on Thursday, <br />February 22, but no discharge into the Williams Fork from discharge point 006 vas <br />observed during any of the inspections. <br />The process water released has either been absorbed either by the bypass ditch or by <br />the six feet of snow that currently fills the ditch. A significant portion of the ditchi is not <br />accessible or observable. <br />The air-operated valve is needed for water hammer protection of the process water <br />return system. The prolonged power failure was the result of heavy snow that <br />temporarily disabled the transmission lines. As a result of this release, the power failure <br />procedure has been modified to include the manual closing of this pneumatically- <br />operated valve. Additionally, the pneumatic valve will be equipped with another air <br />supply that will provide aback-up to the current supply. These steps will prevent a <br />reoccurrence of this unfortunate event. <br />As stated above, the incident did not result in the discharge of process water into the <br />Williams Fork River, or other state waters. Therefore, no anticipated impacts to human <br />health or the environment are expected. We will continue to inspect discharge point 006 <br />to ensure that we are aware and properly monitor a discharge from that point should it <br />occur. Pursuant to terms and conditions of the discharge permit, appropriate <br />notifications have been made to the state. <br />Please contact me at (303) 271-0107 ext. 2214 should you require any clarification or <br />additional information. <br />Sincerely, <br />~~ , <br />Tim Eastep <br />Environmental Engineer <br />cc: C. Janes <br />S. Johnson <br />J. Mahon <br />J. Danni <br />J. Jones <br />A. Ihlenfeldt <br />j C C 1,2 5~ r cr---~ <br />I K t"C~ _ cJ /c ~k ~ S <br />r'K ~ ~c ~ , <br />