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A N A L YT I C A L <br /> r <br /> LABORATORIES <br /> Certificate of Analysis <br /> Don Light <br /> Del-Tech Geotechnical Services Report Issue Date 08/20/98 <br /> 14624 Olive Avenue <br /> Oakdale, CA 95361 <br /> Sample Date 07/23/98 <br /> Submission Number 9807000680 Sample Time 21:00 <br /> Lab Number 70686 Sample Type LIQUID <br /> Project Number <br /> Project Desc. Del Monte-2nd Qtr. <br /> Sample Description MW-1 <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLA <br /> EPA 8015/ Benzene 07/31/98 07/31/98 98 µg/L 0.3 10 3 <br /> EPA 8020 <br /> EPA 8015 / Ethylbenzene 07/31/98 07/31/98 48 µg/L 0.3 10 3 <br /> EPA 8020 <br /> "A 8015 / Toluene 07/31/98 07/31/98 150 µg/L 0.3 10 3 <br /> : 8020 <br /> EPA 8015/ Xylenes, Total 07/31/98 07/31/98 150 µg/L 0.3 10 3 <br /> EPA 8020 <br /> EPA 8015/ Gasoline 07/31/98 07/31/98 1300 µg/L 50 1 50 <br /> EPA 8020 <br /> EPA 8015/ Methyl-tert-Butyl 07/31/98 07/31/98 ND µg/L 5 10 50 <br /> EPA 8020 Ether <br /> ND None DetectedP L Practical Quantitation Limit Conversions: <br /> mg/L Milligrams/Liter ppm Di Dilution Factor 1 ppm = 1000 ppb <br /> ug/L Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> rPVkg Milligrams/Kilogram - ppm derived by (PQL x Dil) <br /> ( g Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street ' Fresno, CA 93706.1623 ' Phone 209-497-2888, In CA 800-877-8310 ' Fax 209-485-6935 <br />