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DEERE&AULT CONSULTANTS, INC <br /> JANUARY 31,2011 <br /> Page 2 <br /> I do recognize that we have in the past accepted leak test reports that utilized 1000A of the <br /> precipitation. Honestly, I don't think this was an issue in the pastas the other liners would <br /> have passed regardless of the percentage used; it simply wasn't a cause to delay a liner <br /> approval. However, since we have previously accepted tests utilizing 100% of the <br /> precipitation without comment you had no Way of knowing that utilizing 100% of the <br /> precipitation was not_aoeeptable. Therefore, we*wIff accept the 100% value for this test. <br /> Please be advised that we will no lionger.accept utir'ization of 10Q% Of the precipitation in <br /> gravel pit liner tests <br /> La Poudre Reservoirs Number 3 and Number 4 are accepted as having been lined to <br /> the perfommmnee standard referenced in the August 1999 State Engineer Guidelines for <br /> Lining Criteria for Gravel Pits. Meeting the performance standard requires that A <br /> wafter inflows and outflows for the reservoirs must be accounted for on a weekly <br /> basis. <br /> With this liner approval, La Poudre Reservoirs Number 3 and Number 4 may be used to <br /> store water in accordance with the 1999 SEO Guidelines. Prior to any storage at this site, <br /> the operator will need to coordinate with the District 3 Water Commissioner, currently <br /> George Varra,to review operations and accounting. <br /> If you would like to discuss the matter any further please contact me or Jonathan <br /> Hernandez,at the number on the first page. <br /> Sincerely, <br /> David L. Nettles, P.E. <br /> Division Engineer <br /> ec: George Varm,District 3 Water Commissioner <br /> WDiD(0303010,0303376,0303377) <br />