Laserfiche WebLink
• <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 />CO-0000213 <br />Effluent Grab <br />10/191041030 <br />10/19/041215 <br />Reconstituted Laboratory Water <br />1.0°C <br />• TEST ORGANISMS <br />Fathead minnow <br />Daphnia magna <br />Age: 6 days <br />Age: <24 hrs <br />• PROCEDURE <br />Aarte, 48 and 96-hour bioassays as outlined in the most recent protocols specified by the Water <br />Quality Control Division of the Colorado Department df Health (1998). <br />• DISCUSSION <br />According to the Western Fuels -Colorado discharge permit (CO-0000213), an acute WET test is <br />failed whenever the LCD, 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.survivai. Therefore, outfall 007 is in compliance <br />with the acute WET portion of its Colorado State Industrial General Minimal Discharge Permit for <br />the fourth quarter of 2004. <br />• DATE OF REPORT <br />November 1, 2004 <br />R ort prepared by: Sarah Mozingo <br />Biomoni onng upe ' or Da e <br />Report reviewed by: Heath Smith <br />~ !{r3-OY <br />Laboratory Technician Date <br /> <br />4 <br />