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404 N Wlget Lane <br /> Walnut Creek,CA 94598 <br /> 9 <br /> It(IN Sequoia FAX 25)908- <br /> www sequolalabs corn <br /> Analytical <br /> SAW <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0123 Reported <br /> Dublin CA,94569 Project Manager Deanna L Harding 20-Ju1-00 11 19 <br /> Volatile Organic Compounds by EPA Method 8010B- Quality Control <br /> Sequoia Analytical -Walnut Creep <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0003007-EPA 5030B[PIT] <br /> LCS(OG03007-BS2) Prepared&Analyzed 30-Jun-00 <br /> 1,1-DwWorodhene 250 10 ugn 200 125 65-135 <br /> Tnchlorou0mm 160 to 200 goo 70-130 <br /> Chlowbermme ISO 10 " 200 900 70-130 <br /> Surrogate DtbromodiJhwr0wdhane 930 100 930 50-150 <br /> Surrogate 4-Bromofluorober¢ene 100 100 100 Sa150 <br /> LCS(OG03007-BS3) Prepared&Analyzed 03-Jul-00 <br /> 1,1-Dichloroetheme 210 10 ug/l 200 105 65-135 <br /> Tnchloroadme 200 10 200 100 70.130 <br /> Chlorobenzme 200 10 200 100 70-130 <br /> Surrogate Dibromodlfluorowthow 990 1 a 0 990 50.150 <br /> 4Fgate �BromofhrorobeHUM 110 J00 110 50-150 <br /> (0G03007 BS4) Prepared&Analyzed 29-Jun-00 <br /> 1,1-Mchloroathene 200 10 ug/l 200 100 65-135 <br /> Tnchloroedmw 190 10 200 950 70-130 <br /> Chlorobenzene 190 10 200 950 70-130 <br /> Surrogate Dibromodiuorumethane 100 l ao 100 50-150 <br /> SwmSate 4-Bromofluarobenzene 110 100 110 50.130 <br /> Matra Spike(OG03007-MS1) Source W006591-01 Prepared&Analyzed 03-Ju1-00 <br /> 1,1-Drdiloroethene 200 10 ug/l 200 ND 100 60-140 <br /> Tnobloroelhene 190 10 " 200 ND 950 60-140 <br /> C hlorobamwe 190 10 200 ND 950 60-140 <br /> SwMwe Dtbronwdtfiuorvm dad 910 mo 0 91 0 50-150 <br /> Surrogate t-Bromofluorobewene 910 100 910 SO-150 <br /> Matra Spike Dup (0003007-MSD1) Source W006591-01 Prepared&Analyzed 03-Jul-00 <br /> 1,1-Du3doroethena 220 10 ug/41 200 ND 110 60-140 952 25 <br /> Tnchloroelhene 220 10 " 200 ND 110 60-140 14.6 25 <br /> Chlorobenzene 210 10 200 ND 105 60-140 100 25 <br /> Swwgate Dibromodiiluoromedhane 960 100 960 50-150 <br /> Surrogate 4-Bromofluarobetaem 100 " 100 100 50.150 <br /> ffquoia Analytical-Walnut Creek The results,n lks report apply to the samples an*---d in axwidarece with the chain of <br /> cusmdy document This analytical m7ort must be mpreduced in its an(irety <br /> Page 19 of 20 <br />