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A N A L Y T I C A L <br /> 'LABORATORIES <br /> Certificate of Analysis <br /> w <br /> Don Light <br /> Del-Tech Geotechnical Services Report Issue Date 03/12/99 <br /> 10624 Olive Avenue <br /> Dalsdale, CA 95361 <br /> Sample Date 02/10/99 <br /> Submission Number 9902000483 Sample Time 16:23 <br /> f ab Number 98902 Sample Type LIQUID <br /> 'roject Number Diso <br /> Project Desc. Ground Water Monitoring <br /> Sample Description MW-7DBB <br /> BSK LABORATORIES LUFT ANALYSIS <br /> Date Date <br /> �. Viethod Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 03/05/99 03/05/99 ND pg/L 0.3 1 0.3 <br /> EPA 8020 <br /> ,'MODIFIED) <br /> EPA 8015/ Ethylbenzene 03/05/99 03/05/99 ND ug/L 0.3 1 0.3 <br /> EPA 8020 <br /> "IODIFIED) <br /> EPA 8015 / Toluene 03/05/99 03/05/99 ND yg/L 0.3 1 0.3 <br /> EPA 8020 <br /> ;MODIFIED) <br /> EPA 8015/ Xylenes,Total 03/05/99 03/05/99 ND µg/L 0.3 1 0.3 <br /> SPA 8020 <br /> ;MODIFIED) <br /> EPA 5015/ GasoIine 03/05/99 03/05/99 ND µg/L 50 1 50 <br /> EPA 8020 <br /> IM OD IF IED) <br /> EPA 8015/ Methyl-tert-Butyl 03/05/99 03/05/99 ND jcg/L 5 1 5 <br /> EPA 8020 Ether <br /> WIvIODIFIED) <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 /> n1-,/kg Milligrams/Kilogram a ppm derived by (PQL x Dil) <br /> ' b Micrograms/Kilogram - ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus Street • Fresno, CA 93706-1623 • Phone 559-497-2888, In CA 800-877-8310 6 Fax 559-485-6935 <br />