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TES BIOASSAY LABORATORY <br /> 1201 Illinois Avenue <br /> r & San Francisco, CA 94107 <br /> Report to <br /> Test No.: SA-1 <br /> Test Period: April 13-17, 1998 <br /> Date Reported: April 22, 1998 <br /> Craig P.Se@enrich <br /> Laboratory Director <br /> TITLE 22 BIOASSAY: Screen X Definitive <br /> Sample Description: Stockton MGP sediment core <br /> Test Organism: Pimephales promelas, Source: Thomas Fish Co. <br /> fathead minnow <br /> Temperature Range: Control Aquaria, 19.3-20.8 °C Test Aquaria, 19.1-20.2 °C <br /> Aeration: Control Aquaria, Yes Test Aquaria, Yes <br /> Test Sample Concentration (mg/1) <br /> Bioassay Time in 250 250 500 500 750 750 Control <br /> Conditions Hours No. % No. % No. % No. % No. % No. % <br /> Start 20 100 20 100 20 100 20 100 20 100 20 100 <br /> Organisms 24 20 100 20 100 20 100 20 <br /> Surviving 48 20 100 20 100 20 100 <br /> 100 20 100 20 100 20 100 20 100 20 100 <br /> 72 20 100 20100 20 100 20 100 18 90 19 95 <br /> 96 20 100 20 100 20 100 20 100 18 90 19 95 <br /> Start 8.4,8.2 8.2,8.1 8.2,8.1 8.2,8.1 <br /> Dissolved 24 6.9,6.8 7.2,7.2 7,2,7,3 7.2,7.4 <br /> Oxygen 48 7.2,7.4 7.6,7.5 6.8,7.5 <br /> (mg/1) <br /> 72 7.0,7.0 <br /> 96 <br /> 7.3,7.3 7.5,7.5 7.3,7.2 7.9,8.0 <br /> Start <br /> 8.2,8.2 8.2,8.2 8.31,8.3 8.0,8.0 <br /> 24 <br /> 8.0,8.1 7.917.97.9,7.9 7.9,7.9 <br /> pH 48 <br /> 7.8,7.8 7.8,7.9 7.9,7.9 7.9,7.8 <br /> 72 7.9,7.8 7.8,7.8 7.8,7.8 7.93.8 <br /> 96 7.9,7.9 7.8,7.9 7.9,7.9 7.9,7.9 <br /> Alkalinity Start <br /> (mg/I CaCO3) 96 56 43 <br /> Hardness Start 57 45 <br /> (mg/I CaCO3) 96 44 46 <br /> Conductivity Start 44 47 <br /> (pmhos) 96 104 100 <br /> 109 104 <br /> Results: LC50 >750 mg/I 95% Confidence Limits N/A <br /> Method: Linear Interpolation(probit,angle,etc.analyses could not be used because there were less than two partial responses) <br /> Fish Length(cm): Max.= 3.4 Min.= 3.0 Mean= 3.2 <br /> Fish Weight(g): Max.= 0.5 Min.= 0.3 Mean= 0.4 <br /> Title 22-SAI <br />