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LABORATORIES <br /> Certificate of Analysis <br />'John Pfeiffer <br /> BSK& Associates, Sacramento Report Issue Date 07/07/99 <br /> 3140 Gold Camp Drive Suite 160 <br />'Rancho Cordova, CA 95670 <br /> Sample Date 06/19/94 <br /> Submission Number 9906000595 Sample Time 12-28 <br /> Ipo <br /> Lab Number 116987 Sample Type LIQUID <br /> tect Number 07-40-0178 <br /> Prroject Desc Greer Property <br /> Sample Descnption W-71-MW-1 <br /> 1 BSK LABORATORIES LLTF I'ANALYSIS <br /> Date Date. <br /> Method Analyte Prep. Arial. Result Units PQL Dd DLR <br /> EPA 8015 / Benzene 07/01/99 07/02/99 70 µg/L 03 20 6 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Ethylbenzene 07/01/99 07/02/99 1.2 µg/L 03 1 03 <br /> 8020 <br /> IWIFIED) <br /> EPA 8015/ Toluene 07/01/99 07/02/99 16 µg/L 03 1 03 <br /> EPA 8020 <br />'(MODIFIED) <br /> EPA 8015 / Xylenes,Total 07/01/99 07/02/99 9.9 µ91L 03 1 03 <br /> EPA 8020 <br />'(MODIFIED) <br /> EPA 8015/ Gasoline 07/01/99 07/02/99 3100 µg/L 50 20 1000 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Methyl-tert-Butyl 07/01/99 07/02/99 200 Pcg/L 5 1 5 <br />-EPA 8020 Ether <br />'(MODIFIED) <br /> ND None Detected PQL Practical Quantitation Limit Conversions <br /> g/L MtlIigrams/Lfter — ppm DI l Dilution Factor 1 ppm = 1000 ppb <br /> g/L Mtcrograms/Liter — ppb DLA Reportable Detection Limit 1 ppb = 0 001 ppm <br /> kg Milligrams/Kilogram — ppm derived by(PQL x Dil) <br /> H Micrograms/Kilogram a ppb PLgher limits may result from exceptional sample matrices or interferences <br /> I <br />' 1414 Stanislaus Street , Fresno, CA 93706-1623 Phone 559-497-2888, In CA 800-877-8310 Fax 559-485-6935 <br />