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2.3 DATA ANALYSIS <br /> All toxicity testing results will be analyzed using an appropriate statistical method to <br /> determine a LC50 and the corresponding 95% confidence limits. <br /> 3. RESULTS <br /> 3.1 SAMPLE IDENTIFICATION <br /> Client Sample BES Sample Date Testing Period <br /> Identification Sample# Collection Date Received <br /> Filter 2010 27263 10/11/2010 10/lb/2010 10/19-10/23/2010 <br /> 3.2 SAMPLE DESCRIPTION <br /> Sample Type Solid <br /> Appearance Peaces of rock <br /> Odor No <br /> 3.3 O. m kiss TEST RESULTS <br /> Client Sample Sample 96-Hour Percent Survival <br /> Identification Control 250 mg/L 500 mg/L 750 mg/L <br /> Filter 2010 100 100 100 100 <br /> 3.4 STATISTICAL ANALYSIS <br /> Client Sample Sample 96-Hour Percent Survival <br /> Identification LC50 95% Upper Confidence 95% Lower Confidence <br /> (mg/L) Limit (mg/L) Limit (mg/L) <br /> Filter 2010 > 750 NA NA <br /> NA -Not applicable <br /> 3.5 NOTES <br /> The photocopied data sheet(s) and chain-of-custody for testing, are attached. If you have any <br /> questions concerning this report please contact the BES laboratory, (925) 682—7200. <br /> BES #27263 Page 3 of 3 <br /> Page 26 of 30 <br />