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I,r <br /> A N L Y T I C A L <br /> LA :. '. O RATORI ES <br /> Certificate of Analysis <br /> Don Light <br /> Del-Tech Geotechniczl c:rv:ce:; Preparation Date 09/18/98 <br /> 10624 Olive Avenue Analysis Date 09/18/98 <br /> Oakdale, CA 95361 Report Issue Date 09/23/98 <br /> Submission Number 9309000283 Sample Date 09/08/98 <br /> Sample Time 14:10 <br /> Lab Number 76896 Sample Type LIQUID <br /> Pro ect Number <br /> Project Desc. Calif.Welding, Tracy <br /> Sample Description Domestic Well <br /> 52.1.2, Volatile Organic Compounds by GC/MS(Cont.) <br /> Analyte Result Units PQL Dil DLR <br /> 1,2-Dichloroethane ND µg/1 0.5 1 0.5 <br /> 1,1-Dichloroethene ND µg . 0.5 1 0.5 <br /> cis-1,2-Dichloroethene ND µg/1 0.5 1 0.5 <br /> trans-l,2-Dichloroethene ND µg/1 0.5 1 0.5 <br /> 1,2-Dichloropropane ND µg/1 0.5 1 0.5 <br /> 1,3-Dichloropropane ND µg/1 0.5 1 0.5 <br /> 2,2-Dichloropropane ND µg/1 10.0 1 10 <br /> 1,1-Dichloropropylene ND µg/1 0.5 1 0.5 <br /> -=;-1,3-Dichloropropylene ND 1'g/1 0.5 1 0.5 <br /> ns-1,3-Dichloropropene ND 119/1 0.5 1 0.5 <br /> [ethy1 Ether ND ug/I 0.5 1 0.5 <br /> Ethylbenzene ND µg/1 0.5 1 0.5 <br /> Ethylmethacrylate ND µg/l 1.0 1 1 <br /> Hexachlorobutadiene ND 119/1 0.5 1 0.5 <br /> Hexachloroethane ND µg/1 0.5 1 0.5 <br /> 2-Hexanone ND µg/1 10.0 1 10 <br /> Iodomethane ND 1'g/1 1.0 1 1 <br /> Isopropylbenzene ND µg/l 0.5 1 0.5 <br /> p-Isopropyltoluene ND µg/1 0.5 1 0.5 <br /> 4-Methyl-2-pentanone ND µg/1 10.0 1 10 <br /> Methyl-tert-butyl Ether ND µg/l 1.0 1 1 <br /> Methylacrylate ND µg/l 0.5 1 0.5 <br /> Methylene Chloride ND µg/l 10.0 1 10 <br /> Methylmethacrylate ND µg/l 0.5 1 0.5 <br /> Naphthalene ND µg/l 0.5 1 0.5 <br /> Nitrobcnzene ND µg/1 0.5 1 0.5 <br /> Pentachloroethane ND µg/1 0.5 1 0.5 <br /> n-Propylbenzene ND µg/1 0.5 1 0.5 <br /> Styrene ND µg/1 1.0 1 <br /> 1,1,1,2-Tetrachloroethane ND µg/1 0.5 �F--e"P'XJFD 0.5 <br /> 0 C T 14 1998 <br /> ND None Detectr( PQL Practical Quantitation Limit HWN i tt-t ist ns: <br /> mg/L Milligrams/Li: .� =; ppr.i Di Dilution Factor pp 1000 ppb <br /> µg/L Micrograms/' :. = pp'Z) DLR Reportable Detection Limit 1 ppb = 0.001 ppm <br /> mg/kg Milligrams/Ki am = ppm derived by(PQL x Dil) <br /> µg/kg Micrograms/h .-,,ran = ppb Higher limits may result from exceptional sample matrices or interferences <br /> 1414 Stanislaus St 1.esno, CA 93706-1623 ' Phone 209-497-2888, In CA 800-877-8310 • Fax 209-485-6935 <br />