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GeOrrhalytical Laboratories;ln6ic. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209)572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Report# K333-07 Date: 12/10/99 <br /> San Joaquin County D.A.,EPU Date Rec'd: 11/29/99 <br /> Source: Date Started: 12/3/99 <br /> 222 E.Weber Avenue Date Completed: 12/7/99 <br /> Stockton CA 95202 <br /> Tame 11 15am <br /> Sampled: 99 <br /> Project: <br /> Sampler. L.Briggs/A.Youngblood <br /> Sample ID: SW111799-2C El Final ferrous sulfate bag <br /> Lab ID: K23665 <br /> Aquatic Toxicity <br /> Test Type: EPA/600/4-90/027F Control 10 mg/L 50 mg/L 100 mg/1-250 mg/1-500 mg/L <br /> Dilution Water: Reconstituted DI Water Initial PH 7.74 7.70 7.38 6.91 6.63 6.12 <br /> Species: Pimephales Promelas (Larval) 12/3/99 D.O. 8.42 8.35 8.32 8.15 7.94 7.80 <br /> Common Name: Fathead Minnow Temp.°C 19.2 19.3 19.1 19.2 19.3 19.2 <br /> Supplier: Aquatic Resources <br /> Dilution Volume: 2000 ml 24 Hrs. PH 7.70 7.63 7.34 6.84 6.55 6.09 <br /> #Fish per Dilution:20 <br /> 12/4/99 D.O. 8.31 8.26 8.22 7.82 7.59 7.44 <br /> Dead in Acclimation Tank: 0 Temp.°C 20.2 20.3 20.1 20.2 20.4 20.2 <br /> Average Length: NA Mortalities 0 2 3 4 5 7 <br /> Average Weight: NA 48 Hrs. PH 7.68 7.60 7.32 6.83 6.55 6.07 <br /> 12/5/99 D.O. 8.18 7.88 7.80 7.51 7.34 7.13 <br /> Temp.°C 19.5 19.7 19.9 19.7 19.5 19.9 <br /> Mortalities 0 2 1 1 3 2 <br /> Initial Control Hardness 80 72 Hrs. PH 7.64 7.61 7.34 6.81 6.53 6.03 <br /> Final Control Hardness 80 12/6/99 D.O. 8.06 7.55 7.43 7.11 7.04 6.66 <br /> Temp.'C 19.9 19.8 20.2 20.0 19.8 19.7 <br /> Mortalities 0 0 2 1 1 1 <br /> 96 Hrs. PH 7.64 7.60 7.31 6.80 6.51 6.00 <br /> 12/7/99 D.O. 7.94 7.04 7.03 6.54 6.44 6.03 <br /> Temp.°C 19.2 19.4 19.3 19.3 19.4 19.4 <br /> Mortalities 0 0 0 1 0 0 <br /> Total Mortalities 0 4 6 7 9 10 <br /> Notes <br /> Using the EPA Probit analysis program the estimated LC50 value from mortalities observed in this test is 12.6. <br /> ,' HaZroSalgad>� Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />