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SGT <br />ADDRESS ALL C,ORRESl'ONDE. Nf.E TO. <br />CpAMERCUL TESTING d ENGINEERING CO <br />r9G5 PARIS STRC[T, Sl,'ll F. li~200 <br />DE':YL R, CO 90237 <br />TI.L lal9i ;17y~772 <br />Narrative and Discussion <br />• PERMIT AND SAMPLE INFORMATION <br />NPDES pem7it it: CO-0000213 <br />Type of sample: Effluent Grab <br />Date and time of sample(s): 05/1 2103 1 035 <br />Date and time of lest start: 05/13/03 1125 <br />Dilution water. Reconstituted Laboratory Water <br />Receiving temperature(s): 2.0 ° C <br />• TEST ORGANISMS <br />Fathead minnow Age: 11 days <br />Dapf7nia rnagna Age: <24 hrs <br />• PROCEDURE <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 LC,o, 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 l0 100% effluent. <br />By this dcftn)tion, the results of this bioassay indicate that effluent from outfall 007 is not acutely <br />toxic to fattlead minnow and Daphnia magna survival. Therefore, outfall 007 is in compliance <br />with the acute WET portion of its Colorado State Industrial General Minimal Discharge Permit for <br />the second quarter of 2003. <br />• DATE OF REPORT <br />May 19, 2003 <br />Report /prepared-by Chris Theel ,R-(e~~(port reviewed by: Sar`ahlLohner(~ <br />Bion7onitoring Supervisor Dale Laboratory Technician Date <br />4 ~ ~ ~ ~ Mrtuyys Se~u~ce: I,xx'ale U't .e <br />1919$Hu)N,va d:r ~are;l!1(i.l:v2;v;.u EAiCF r16A~1'15J~9700 1161015599?)]6 wA»~iis wm ___ <br />, yq _ - _ N~mO~i oIW S'nS baq {SaM11 °MrY~ Y f~minW <br />