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Sequoia 1551 industrial Road <br /> San Carlos CA 94070 <br /> Analytical (650)232 9600 <br /> FAX(650)232-9612 <br /> www seyuoiaEabs coin <br />,JG,ettler-Ryan/Geostrategies(I) Project Unoca](4) <br /> 7 Sierra Court,Suite J ProjectNumber Former Unocal 45098& Montgmery Ward Reported <br /> lin CA, 94568 Project Manager Deanna Harding 03/26/02 12 44 <br /> Volatile Organic Compounds g p s by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Emits Level Result %REC Limits RPD Limit Notes <br />§atch 2030023-EPA 5030B IP/TI <br /> Blank(2030023-BLKI) Prepared&Analyzed 03/14/02 <br /> 124-Tnmethylbenzene ND 20 ug/1 <br /> 35-Tnmethylbenzene ND 20 <br /> „ <br /> ki"irtyl.chloride ND 20 <br /> Total Xylenes ND 20 „ <br /> Vurrour-ragate 1 1-Dichloroethane-d4 961 100 962 63-118 <br /> gate Toluene-d8 103 100 103 88-110 <br /> Sui rogate 4-BFB 106 100 106 86-115 <br /> CS(2030023-BSI) Prepared&Analyzed 03/14/02 <br /> enzene 176 20 ug/1 200 880 70-130 <br /> Chlorobenzene 17 1 20 200 85 5 70-130 <br /> t1-Dichloroethene 183 20 200 91 5 65-135 <br /> oluene 165 20 200 825 70-130 <br /> Tnchloroethene 189 2 0 200 945 70-130 <br /> rpate12 Dichloroethane-d4 952 100 951 63-118 <br /> ate Toluene-dN 989 100 989 88-110 <br /> Surrogate 4-BFB Jos 100 108 86-115 <br /> atrix Spike(2030023-]VISI) Source L203015-25 Prepared& Analyzed 03/14/02 <br /> Benzene 182 2 0 ugn 200 ND 91 0 60-140 <br /> Chlorobenzene 188 2 0 200 ND 94 0 60-140 <br /> t1-Dichloroethene 165 2 0 200 ND 82 5 60-140 <br /> oluene 175 2 0 200 ND 875 60-140 <br /> Trichloroethene 192 2 0 200 ND 960 60-140 <br /> irogate 11-Dichloroethane-d4 834 100 834 63-118 <br /> rrogate Toluene-d8 101 <br /> 100 101 88-110 <br /> Surrogate 4-BFB 109 100 109 86-115 <br /> a Analytical - San Carlos The f esults in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 86 of 91 <br />