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BSKA N A L Y T I C A L <br /> LABORATORIES <br /> Chanya Heang Certificate of Analysis <br /> Caltest Analytical Laboratory ELAP Certificate#1180 <br /> 1885 N Kelly Road Report Issue Date 01/22/2003 <br /> Napa, CA 94558 <br /> BSK Submission#. 2002120386 <br /> BSK Sample ID#: 272992 <br /> Project lD C120220 Project Desc <br /> Submission Comments <br /> Sample Type Liquid Date Sampled I2/05/2002 <br /> Sample Description Flag City Chevron Eff Time Sampled 1438 <br /> Sample Comments Date Received 12/06/2002 <br /> Organics <br /> Prep Analysts <br /> Analyte Method Result Units MDL ML Dilution DLR Date Date <br /> Glyphosate EPA 547 ND µg/L 46 25 1 25 12/17/2002 12/17/2002 <br /> Endothall EPA 548 1 ND µg(L 19 45 1 45 12/12/2002 12/23/2002 <br /> Diquat EPA 549 1 ND µg/L 08 4 1 4 12/10/2002 12/10/2002 <br /> Surrogate <br /> Bromoform EPA 504 1 1089 %Ree - 1 N/A 12/09/2002 12/12/2002 <br /> • DCPAA EPA 515 3 71 %Rec 1 N/A 12/11/2042 12/12/2002 <br /> 1,3-Dimethyl-2-mtrobenzene EPA 525 2 100 %Rec 1 NIA 12/16/2002 12/18/2002 <br /> BDMC EPA 531 1 104 %Rec - I NIA 12/22/2002 12/22/2002 <br /> AMPA EPA 547 1019 %Rec - 1 N/A 12/17/2002 12/17/2002 <br /> DNQ=Detected,not quantified The trace values between the MDL and DLR are of an unknown data quality Baseline noise, <br /> calibration curve extrapolation below the lowest calibrator,method blank detections, and integration artifacts can all produce apparent <br /> DNQ values,which contribute to the un-reliability of these values <br /> mg/L Milligrams/Liter(ppm) MDL Method Detection Limit H Analyzed outside of hold time <br /> mg/Kg Milligrams/Kilogram(ppm) DLR Detection Limit for Reporting P Preliminary result <br /> . L Micro <br /> µg/ grams/Ltter(ppb) PQL x Dilution S Suspect result See Cover Letter for comments <br /> ND None Detected above MDI <br /> µg/Kg Mtcrograms/Kilogram(ppb) ML Practical Quantitation Limit See <br /> Analysis performed by External laboratory <br /> 0/*Rec Percent Recovered(surrogates) See External Laboratory Report attachments <br /> DNQ Detected,Not Quantified DNQ Trace Result(>MDL,<DLR Trace results are only qualitative values(estimates) <br /> Report Authentication Code IIMIMI[OmaiiiiiomiiiilgllmmllllMilli Page oft <br /> 1414 Stanislaus Street Fresno,CA 93706-1623 Phone 559-497-2888,In CA 800-877-8310 Fax 559485-6935 <br />