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Sequoia 1551 Industnal Road <br /> San Carlos CA 94070 <br /> Analytical FA (650)232-96 <br /> FAX(650)232-9612 <br /> WWW sequowabs com <br /> er-Ryan/Geostrategies(1) Project Unocal(4) <br /> 7 n CA,Court, Suite 7 Project Number Former Unocal 45098, Stockton Reported <br /> Fftlrrra <br /> ]tn CA,9456$ Project Manager Deanna Harding 07/01/02 07 46 <br /> Volatile Organic Compounds by EPA Method 8264E - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Luna Units level Result %REC Limits RPD Limit Notes <br /> itch 2060032-EPA 5030B [P/Tl <br /> LCS(2060032-BSI) Prepared&Analyzed 06/20/02 <br /> ,tzene20 0 20 ugjl 200 100 70-130 <br /> orobenzene 212 20 200 106 70-130 <br /> -D,chloroethene 204 20 " 200 102 65-135 <br /> Toluene 21 S 2 0 200 108 70-130 <br /> 20 1 20200 100 70-I30 <br /> jhloroethene <br /> agate 1,2-Dichloroethane-d4 102 100 162 76-114 <br /> Surrogate Toluene-d8 103 100 103 88-110 <br /> agate 4-BFB 924 100 924 86-115 <br /> Is <br /> (2060032-BS2) Prepared&Analyzed 06/21/02 <br /> Benzene 186 20 ug/l 200 93 0 70-130 <br /> robenzene I7 4 2 0 200 870 70-130 <br /> tDichloroethenc 17 3 20 20 0 865 65-135 <br /> Toluene 175 2 0 200 875 70-130 <br /> llkftoethene 198 2 0 200 990 70-130 <br /> ale 1 2-Drchloroethane-d4 106 100 106 76-114 <br /> surrogate Toluene-d8 954 100 954 88-110 <br /> trix <br /> gate 4-BFB 930 " 100 930 86-115 <br /> Spike(2060032-MSI) Source L206021-25 Prepared 06/20/02 Analyzed 06/21/02 <br /> Ienzene 210 2 0 ugA 200 ND 105 60-140 <br /> tobenzene 21 5 2 0 200 ND 108 60-140 <br /> ichloroethene <br /> 22 0 2 0 200 ND 110 60-140 <br /> oluene 22 1 2 0 200 ND 110 60-140 <br /> Ir loroethene 214 2 0 200 ND 107 60-140 <br /> gate 1,2-D:chloroethane-d4 101 10 0 102 76-114 <br /> irragate Toluene-d8 101 100 101 88-110 <br /> gate 4-BFB 953 100 95 3 86-115 <br /> 1 <br /> Ill <br /> oia Analytical- San Carlos The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page 89 of 103 <br />