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MDA N A L Y T I C A L <br /> LABORATORIES <br />' Certificate of Analysis <br /> Don Light <br />' Del-Tech Geotechnical Services Report Issue Date 05/11/99 <br /> 10624 Olive Avenue <br /> Oakdale, CA 95361 <br />' Submission Number 9904000746 109537 Sample Date 16 30 99 <br /> Lab Number Sample Time 16 30 <br /> Protect Number GW Monitoring Sample Type LIQUID <br /> Project Desc George's Service <br /> Sample Description 31448 H 33 <br /> IBSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> Method Analvte Prep Anal Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 05/04/99 05/04/99 ND ug/L 0 3 1 0 3 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Ethylbenzene 05/04/99 05/04/99 ND Mcg/L 03 0 3 1 <br /> EPA 8020 <br /> (MODIFIED) <br /> 8015 / Toluene 05/04/99 05/04/99 ND ug/L 0 3 1 <br /> E 03 <br /> A 8020 <br /> (MODIFIED) <br /> EPA 8015 / XyIenes, Total 05/04/99 05/04/99 ND <br /> EPA 8020 ug/L 03 1 0 3 <br /> (MODIFIED) <br /> tEPA 8015 / Gasoline 05/04/99 05/04/99 ND ug/L 50 1 SO <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015 / Methyl-tert-Butyl 05/04/99 05/04/99 ND /L 5 <br /> EPA 8020 Ether Fig 1 5 <br /> (M ODIF IED) <br /> I <br /> III <br /> ND None Detected PL Practical Quantitation Limit Conversions <br /> mg/L Milltgrams/Luer = ppm D11 Dilution Factor 1 ppm = 1000 ppb <br /> g/L Micrograms/Liter — ppb DLR Reportable Detection Limit 1 ppb = 0 001 ppm <br /> mg/kg Milligrams/Kilograms ppm derived by (PQL x Dil) <br /> µ Micrograms/Kilogram = ppb Higher limits may result From exceptional sample matrices or interferences <br /> r <br /> 1414 Stanislaus Street • Fresno, CA 93706-1623 9 Phone 559-497-2888, In CA 800-877-8310 0 Fax 559-485-6935 <br />