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<br />ADDRESS ALL CORRESPONDENCE TO: <br />COMMERCIAL TESTING 8 ENGINEERING CO. <br />4665 PARIS STREET, SUITE B-200 <br />DENVER, CO 80239 <br />TEL: (3031 373-4772 <br />FA%: (303) 373-4791 <br />Narrative and Discussion <br />• PERMIT AND SAMPLE INFORMATION <br />NPDES permit #: <br />Type of sample: <br />Date and time of sample(s): <br />Date and time of test start: <br />Dilution water. <br />Receiving temperature(s): <br />• TEST ORGANISMS <br />Fathead minnow <br />Daphnia magna <br />• PROCEDURE <br />Report prepared by~Sarah\L)ohner ~2 <br />IRomonlt ng~ervlsorg^ Date~~~vJ <br />Acute, 48 and 96-hour bioassays as outlined in the most recent protocols specified by the Water <br />Quality Control Division of the Colorado Department of Health (1998). <br />• DISCUSSION <br />According to the Western Fuels -Colorado discharge permit (CO-0000213), an acute WET test is <br />failed whenever the LCSD, which represents an estimate of the effluent concentration which is <br />lethal to 50% of the test organisms in the time period prescribed by the test, is found to be less <br />than or equal to 100% effluent. <br />By this definition, the results of this bioassay indicate that effluent from outfall 007 is not acutely <br />toxic to fathead minnow and Daphnia magna survival. Therefore, ouffall 007 is in compliance <br />with the acute WET portion of its Colorado State Industrial General Minimal Discharge Permit for <br />the third quarter of 2003. <br />• DATE OF REPORT <br />August 13, 2003 <br /> <br />CO-0000213 <br />Effluent Grab <br />08/05/03 1100 <br />08/06/03 1135 <br />Reconstituted Laboratory Water <br />15.0°C <br />Age: 10 days <br />Age: <24 hrs <br />Report reviewed by: Michelle Cox <br />Laboratory Technician Date <br />4 Commercial Testing & Engineering Co. Minerals SeNites-Corporate Office <br />19t9 S. Highland Ave., Suite 2108. Lombard. IL fi0148 t 16301953-9300 f 16301953-9306 wwwsgs.com <br />I MemAer M Vie SGS Gmup I$eC1A1A GAnArale De Surveillencel <br />FSE <br />