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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Iwo- Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-41 11 (650)232-9600 FAX(650)232-9612 <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Former Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 04-Oct-99 10 17 <br /> Volatile Organic Comlpounds by EPA Method $OIOB- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lmut Units Level Result %REC Lmuts RPD Limit Notes <br /> Batch 9I15009. Prepared 15-Sep-99 Usmg EPA 5030B [PIT] <br /> LCS(9I15009-BSI) <br /> Chlorobenzene 190 050 ug/1 200 950 70-130 <br /> 1 1-Dxchloroethene 160 050 200 goo 65-135 <br /> Tnr.hloroethene 250 030 200 125 70.130 <br /> Surrogate Dibrouradifluoromethane $50 100 850 50.150 <br /> Surrogate 4-Bromofluorobereerre 800 100 800 50-150 <br /> LCS(9I15009-BS2) <br /> Chlorobenzene 200 050 ug/1 200 100 70-130 <br /> 1 l-DiOloroethene 220 050 200 -110 65-135 <br /> TnLhloroethene 190 050 200 950 70-130 <br /> Srtrrovore Drbrornoddhioromethane 120 100 170 50-150 <br /> Surrogate 4-8ronrolluoroberrene 120 10 0 170 5o-150 <br /> LCS(9I15009-BS3) <br /> Chlurobenzene 200 050 ugrl 200 100 70 130 <br /> 1 I-Duhloroethene 270 050 200 135 65-135 <br /> Tru-hioroethene 21 0 0 50 20 0 105-70=130 <br /> Surrogate Dtbrornodtuorourethane 930 100 930 50450 <br /> Surrogate 7-8romofluorobtrceue 840 100 840 )0-150 <br /> Matrix Sptki(9I1501)9-NTSI){ �Y -- � -- -- � — - - Source W909179-08 <br /> Chlorohenzene 21 0 050 Ug/1 200 ND 105 60-140 <br /> l l-DiLhloroethene 170 050 200 ND 850 60-140 <br /> Tn�,hloroethene 210 050 20 0 ND 105 60-140 <br /> Surrogate Drbromodrflrrorornetharre 860 100 560 511-150 <br />— Surrogate 4-Brortrofluorohercene 760 100 - —60 50-150 <br /> Matrix Sprlko, Dup (9[15009-ti1SDl) Source W909179-08 <br /> Chlorob,nztine 220 050 ug/I 200 ND 110 60-140 465 25 <br /> 1 I-DllhlorOLth�nL 17 0 050 200 ND 850 60-140 0 25 <br /> Tn4.,hloroLthLnL 21 0 050 200 ND 105 60-1.10 0 25 <br /> Surrogate Drbromodrfluorometharre 860 100 860 5(,X-150 <br /> Surrogate 4-Brotnofluorobelcene 770 100 770 50-150 <br /> Sequoia Analytical- Walnut Creek The re aItt to Airs report up ply to rhe rrntrplet analyzed r accard anCe%vr1h the churn of <br /> cutito4document Thi%arxtlyncalreportmutitbereprWycedinrrtiennrery <br /> Juh T <br /> eg ey, Frop.0 Markiger <br /> Page 14 of 16 <br />