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r <br /> • IS51IndustnalRoad <br /> D <br /> Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> �� Analytical FAX(650)232-9612 <br /> www sequoialaba com <br /> Gen]er-Ryan/Geostrategles(I) project Unocal(4) <br /> 6747 Sierra Court, Suite J Project Number Former Unocal#5098, Stockton Reported <br /> Dublin CA,94568 - Project Manager Deanna Harding 07/01/02 07 46 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> - Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result LimitUnits Level Result %REC Limits RPB LimitNotes , <br /> Batch 2060034 -EPA 5030B_[P/T� _ r , ,,--,.-- <br /> LCS (2060034-BS2) Prepared&Analyzed 06/24/02 ' <br /> Benzene 210 20 ug/l 200 105 70-130 <br /> Chlorobenzene 218 20 200 109 70-I30 <br /> I,l-Dichloroethene 219 20 200 110 65-135 <br /> Toluene 220 20 200 110 70-130 <br /> Trichloroethene 217 20 200 108 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 100 100 100 76-114 <br /> Surrogate Toluene-d8 100 100 100 88-110 <br /> Surrogate 4-BFB 934 100 934 86-115 <br /> Matrix Spike(2060034-MSI) Source L206021-33 Prepared&Analyzed 06/21/02 <br /> Benzene 191 20 USA 200 ND 955 60-140 <br /> Chlorobenzene 19 7 20 200 ND 985 60-140 <br /> I,I-Dichloroethene 192 - 2 0 x'20 0 - ND -96 0 60-140 <br /> Toluene 229 2 0 200 ND 114 60-140 <br /> Trichloroethene 19 0 2 0 200 ND 950 60-140 <br /> Surrogate 1 2-Dichloroethane-d4 996 100 996 76-114 <br /> Qvrr-e T L"e-e-aR 989 rn n non <br /> —P—— -- — -- "' a v V 7V 7 00-1!V <br /> Surrogate 4-BFB 911 100 911 86-115 <br /> Matrix Spike Dup (2060034-MSDI) Source L206021-33 Prepared&Analyzed 06/21/02 <br /> - Benzene- - - --- -- — -- -- -—17 9-- --- -- 2 0 <br />