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GeOlfnalytical Laboratories,`6ic. <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 Recd: 11/29/99 <br /> 222 E.Weber Avenue Source: Date Started: 12/3/99 <br /> Date Completed: 12/7/99 <br /> Stockton CA 95202 <br /> Project: Date Sampled: 11/17/99 <br /> Time: 11:15am <br /> Sampler: L.Briggs/A.Youngblood <br /> Sample ID: SW111799-2A El Pinal ferrous sulfate bag <br /> Lab ID: K23664 <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 7.64 7.64 7.29 6.70 6.09 5.72 <br /> Species: Pimephales Promelas (Larval) 12/3/99 D.O. 8.57 8.25 8.16 7.97 7.84 7.75 <br /> Common Name: Fathead Minnow Temp.°C 19.0 19.2 19.0 19.4 19.3 19.1 <br /> Supplier: Aquatic Resources <br /> Dilution Volume: 2000 ml 24 I-Irs. PH 7.62 7.60 7.27 6.72 6.05 5.62 <br /> #Fish per Dilution:20 12/4/99 D.O. 8.46 8.18 7.85 7.70 7.62 7.47 <br /> Dead in Acclimation Tank: 0 Temp.oC 19.4 19.7 19.6 19.8 19.8 19.8 <br /> Average Length: NA Mortalities 0 2 4 5 7 8 <br /> Average Weight: NA 48 Hrs. pH 7.60 7.55 7.24 6.69 6.00 5.59 <br /> 12/5/99 D.O. 8.38 7.66 7.53 7.38 7.27 6.98 <br /> Temp.°C 19.6 19.8 20.0 20.1 19.6 19.5 <br /> Mortalities 0 3 3 2 1 1 <br /> Initial Control Hardness 80 72 Hrs. pH 7.58 7.53 7.22 6.68 5.97 5.54 <br /> Final Control Hardness 80 12/6/99 D.O. 8.30 7.70 6.99 6.89 6.58 6.07 <br /> Temp.°C 20.1 20.0 20.4 20.3 20.1 20.1 <br /> Mortalities 0 1 0 2 0 1 <br /> 96 Hrs. pH 7.55 7.50 7.19 6.65 5.95 5.47 <br /> 12/7/99 D.O. 8.15 7.24 6.58 6.49 6.18 5.84 <br /> Temp.°C 19.4 19.5 19.4 19.4 19.8 19.2 <br /> Mortalities 0 1 0 0 0 0 <br /> Total Mortalities 0 7 7 9 8 10 <br /> Notes <br /> Using the EPA Probit analysis program the estimated LC50 value from mortalities observed in this test is 6.8. <br /> ,�� b) � <br /> � i�yLv�a'yeo <br /> Ramiro SalgaYfo . Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />