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i LA N A L Y T <br /> MLABORATORIES <br /> Certificate of Analysis ' <br /> Gina Simile <br /> Geological Technics Inc Report Issue Date 05/11/99 <br /> 2741 River Road <br /> Modesto, CA 95351 i <br /> � Submission Number 9904000805 Sample Date 04/29/99 <br /> . Sample Time Lab Number : 00:00 <br /> 109800 p Sam le Type i <br /> Project Number 750,2SOLID <br /> Project Desc. City Escalon <br /> i Sample Description MW-2 15.5-16 <br /> BSK LABORATORIES LUFT ANALYSIS <br /> i <br /> Date Date <br /> Method Analyte Prep. Anal. Result Units PQL Dil DLR <br /> EPA 8015/ Benzene 05/06/99 05/06/99 ND mg/Kg 0.005 1 0.005 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Eth lbenze <br /> y ne 05/06/99 05/06/99 ND mg/Kg 0.005 1 0.005 <br /> EPA 8020 <br /> (MODIFIED) <br /> U,8015/ Toluene 05/06/99 05/06/99 ND mg/Kg 0.005 1 0.005 <br /> (8020 <br /> (MODIFIED) <br /> EPA 8015/ Xylenes,Total 05/06/99 05/06/99 ND mg/Kg 0.005 1 0.005 <br /> EPA 8020 <br /> (MODIFIED) <br /> EPA 8015/ Gasoline 05/06/99 05/06/99 ND mg/Kg 1 1 1 <br /> I EPA 8020 <br /> (MODIFIED) <br /> LEPA 8015/ Methyl-tert-Butyl 05/06/99 05/06/99 0.60 mg/Kg 0.05 1 0.05 h <br /> EPA 8020 Ether <br /> R(MODIFIED) <br /> i <br /> i <br /> y 1 <br /> i <br /> ND None Detected PQL Practical Quantitation Limit Conversions: : <br /> l <br /> ,ND <br /> Milligrams/Liter = ppm Dil Dilution Factor 1 ppm = 1000 ppb <br /> pg/L Micrograms/Liter — ppb DLR Reportable Deteczion Limit 1 ppb = 0.001 ppm <br /> L /k Milligrams/Kilogram = ppm derived by (PQL x Dil) <br /> Mcg/kg Micrograms/Kilogram — ppb Higher limits may result from exceptional sample matrices or interferences <br /> L <br /> 1414 Stanislaus Street w Fresno, CA 93706-1623 ° Phone 559-497-2888, 1n CA 800-877-8310 . Fax 559-485-6935 <br /> L <br /> 1 _. _ <br />