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COMMERCIAL TESTING 8c ENGINEERING CO. <br />GENERAL OFFICES: 1919 6017TH HIGHLAND AVE.. SUITE 210-8. LOMBARD. ILLINOIS fi0td8 • TEL: 630-953-9700 FAX: fi30-957.9306 <br />SINCE 1908 <br />March 25, 1998 <br />Attention: Mr. Jim Stover <br />J.E. Stover & Associates <br />2768 Compass Drive, Suite 101 <br />Grand Junction, CO 81506 <br />Dear Mr. Stover: <br />PLEASE ADDRESS ALL CORRESPONDENCE TO: <br />4665 PARIS ST., SUITE 8-200 <br />DENVER, CO 80239 <br />TEL: (303)373-4772 <br />FA%: (303) 373-4791 <br />As per our conversation on Monday morning, the 23rd of March, Commercial <br />Testing & Engineering (CT&E) regrets the results of the fathead minnow <br />control failure and subsequent cancellation. Our initial excitement in <br />using CT&E's own hatchery bred minnows for a chronic bioassay was <br />equaled by the disappointment of the resulting mortalities and test <br />cancellation. <br />Historically, effluent from North Thompson Creek Mine is not chronically <br />toxic to fathead minnows. Results from this bioassay indicate that <br />CT&E's test organisms were of poor health, although not visibly, prior <br />to usage and that the NTCM effluent is not chronically toxic. <br />Although the health of those minnows may not have been viable, CT&E is <br />striving to reduce dependency upon outside vendors for test organisms, <br />such as fathead minnows. This in turn will keep costs to our clients <br />down. Until we deem CT&E's own <24 hour old minnows 100% viable, we <br />will continue to order test organisms from an outside vendor in the near <br />future. We wish to avoid a similar set of circumstances that surrounded <br />the North Thompson Creek Mine WET test controls- <br />Furthermore, referencing our conversation that same morning, J.E. Stover <br />& Associates will aot be charged for this bioassay. You will receive an <br />invoice for "ao charge". <br />We greatly appreciate and understand the amount of effort you make in <br />collecting effluent from the North Thompson Creek Mine discharge site. <br />I apologize for any and all inconveniences related to this error. CT&E <br />hopes to continue providing quality biomonitoring services for J.E. <br />Stover & Associates in the future. <br />Sincerely, <br />Commercyi~al`Testing & Engineering <br />~:~t.vr; /Ifcd.~ <br />Chris Theel <br />Biomonitoring Supervisor <br />~~~ SGS Member of the SGS Group (Societe Generale de Surveillance) <br />OVER 40 BRANCH LABORATORIES STRATEGICALLY LOCATED IN PRINCIPAL COAL MINING AREAS, TIDEWATER AND GREAT LAKES PORTS. AND RIVER LOADING FACILITIES <br />