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TES BIOASSAY LABORATORY <br /> 1201 Illinois Avenue <br /> &' San Francisco, CA 94107 <br /> Report to <br /> Test No.: SA-2 <br /> Test Period: April 13-17, 1998 <br /> Date Reported: April 22, 1998 <br /> �ztiti t <br /> �raig P.Sekenric'- <br /> Laboratory Director <br /> TITLE 22 BIOASSAY: Screen X Definitive <br /> Sample Description: Stockton MGP sediment core <br /> Test Organism: Pimephales promelas, <br /> fathead minnow Source: Thomas Fish Co. <br /> Temperature Range: Control Aquaria, 19.3-20.8°C Test Aquaria, 19.2-20.6°C <br /> Aeration: Control Aquaria, Yes <br /> Test Aquaria, Yes <br /> Test <br /> Bioassay Time in Sample Concentration (mg/1) <br /> Conditions Hours No. % ° 250 250 500 500 750 750 Control <br /> No. % No. % No. % No. % <br /> Start 20 100 20 100rin <br /> Organisms 24 20 100 20 100 20 100 20 100 19 9520 20 100 <br /> Surviving 48 20 100 20 100 20 100 95 20 100 <br /> 20 100 <br /> 72 20 100 20 100 19 95 19 95 20 100 <br /> 96 20 100 20 100 19 95 20 100 18 90 19 95 <br /> Start 20 100 18 90 19 95 <br /> Dissolved 24 8.118.0 8.0,8.1 <br /> Oxygen 48 <br /> (mg/1) 72 <br /> 96 7.6,7.3 <br /> Start 7.1,7.3 7.2,7.4 7.9,8.0 <br /> 24 8.1,8.1 8.1,8.1 8. 8.0,8.0 <br /> 8.0,8.0 <br /> pH 48 8.0,8.0 8.0,8.0 8.1,8.0 7.9,7.9 <br /> 72 7.8,7.9 7.9,8.0 8.0,8.0 7.9,7.8 <br /> 96 7.9,7.9 8.0,8.1 8.0,7.9 7.9,7.8 <br /> Alkalinity Start 7'8'7.8 7.9,7.9 7.9,7.9 7,917,9 <br /> (mg/I CaCO3) 96 43 52 <br /> Hardness Start 44 54 <br /> (mg/I CaCO3) 96 46 44 <br /> Conductivity Start 47 45 <br /> (pmhcs) 96 102 100 <br /> Results: LC50 >750 mg/I 95% Confidence Limits N/A 107 104 <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 <br /> Min. = 3.0 Mean= 3.2 <br /> Fish Weight(g): Max.= 0.5 <br /> Min. = 0.3 Mean= 0.4 <br /> Title 22-SA2 <br />