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A <br />1 <br />LABORATORIES <br />Certificate of Analysis <br />Jack Mendrin <br />ND µg/Kg 20 2.5 50 <br />- <br />Di -isopropyl Ether <br />ND µ K2g 0 2.3 50 <br />West Star Environmental <br />ND µg/Kg 20 2.5 50 <br />Preparation Date <br />05/25/98 <br />4688 West Jennifer #101 <br />Analysis Date <br />05/25/98 <br />Fresno, CA 93722 <br />Report Issue Date <br />05/29/98 <br />Sample Date <br />05/11/98 <br />Submission Number <br />9805000274 <br />Sample Time <br />12:35 <br />Lab Number <br />59816 <br />Sample Type <br />SOLID <br />Project Number <br />9815012 <br />Project Desc. <br />Escalon <br />Sample Description <br />S-8, T-2, South @ 15' <br />Oxygenates by <br />GC/MS (8260M) <br />Analyte <br />Result <br />Units PQL Dil <br />DLR <br />Methyl -t -Butyl Ether <br />ND µg/Kg 20 2.5 50 <br />- <br />Di -isopropyl Ether <br />ND µ K2g 0 2.3 50 <br />Ethyl t -Butyl Ether <br />ND µg/Kg 20 2.5 50 <br />t -Amyl Meihyl Ether <br />ND µg/Kg 20 2.5 50 <br />ND None Detected P(.JL Practical Quantitation Limit Conversions: <br />L Milligrams/ Liter = ppm Di Dilution Factor 1 ppm = 1000 ppb <br />c7/L Micrograms/Liter =ppb DLR Reportabie Detection Limit 1 ppb = 0.001 ppm <br />mg/kg Milligrams/Kilogram = ppm derived by (PQL s Dil) <br />ig/kg Micrograms/ Kilogram = ppb ) Iigher limits may result from esceptionai sample matrices or interferences <br />1414 Stanislaus Street • Fresno, CA 93706 ® Phone 209-497-2888, In CA 800-S77-8310 ' Fax 209-485-6935 <br />