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A N A L Y 7 i C A L <br /> MLABORATORIES <br />' Certificate of Analysis <br />' John Pfeiffer <br /> BSK &Associates, Sacramento Report Issue Date 02/09/99- <br /> 3140 <br /> 2/09/993140 Gold Camp Drive Suite 160 <br />' Rancho Cordova, CA 95670 Sample Date 01/08/99 <br /> Submission Number 9901000188 Sample Time 15 16 <br /> Lab Number 93698 Sample Type LIQUID <br />'Project Number 07-40-0178 <br /> Project Desc Escalon <br /> Sample Description W-70-MW-1 <br />' BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br />'EPA 8015/ Benzene 02/03/99 02/03/99 300 lig/L 0 3 40 12 <br /> EPA 8020 <br /> (MODIFIED) <br />'EPA 8015/ Ethylbenzene 02/03/99 02/03/99 14' pg/L 0 3 2 0 6 <br /> EPA 8020 <br /> ODIFIED} <br /> -A 8015/ Tolucric 02/03/99 02/03/99 29 1 g/L 03 40 12 <br /> EPA 8020 <br /> (MODIFIED) <br />'EPA 8015/ Xylenes,Total 02/03/99 02/03/99 20 µg/L 03 2 0 6 <br /> EPA 8020 <br /> (MODIFIED) <br />,EPA 8015/ Gasoline 02/03/99 02/03/99 4200 Iig/L 50 2 100 <br /> EPA 8020 <br />'(MODIFIED) <br /> None Detected PQL Practical Quantitation Limit Conversions <br /> mg1L Milligrams/Liter — ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> g/L Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0 001 ppm <br /> g/kgMilligrams/Kilogram — ppm derived by(PQL x Dil) <br /> l�g Micrograms/Kdogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1 <br />' 1414 Stanislaus Street , Fresno, CA 93706-1623 , Phone 559-497-2888, In CA 800-877-8310 , Fax 559-485-6935 <br />