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Drive <br /> "-Y' 8Hi l CA 5037 <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs com <br /> • <br /> URS Corporation[Arcot] Project BP Heritage#11194,Tracy,CA MOK0115 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-00]] Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/23/05 08 47 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5K11024-EPA 5030B PIT I EPA 8260B <br /> Matrix Spike Dup(5K11024-MSD1) Source MOK0031-02 Prepared 11/11/05 Analyzed 11/12/05 <br /> Toluene 182 25 ugll 186 0 65 98 85-120 4 20 <br /> Xylenes(total) 194 2 5 206 ND 94 85-125 3 20 <br /> Gasoline Range Organics(C4-C12) 2920 250 2200 610 105 60-140 4 25 <br /> Surrogate 12-Dtchloroethane-d4 209 250 84 60-135 <br /> Batch 5KI1031 -EPA 5030B PIT 1 EPA 8260B <br /> Blank(5KI1031-SLKI) Prepared&Analyzed 11111105 <br /> tent Amyl methyl ether ND 050 ug/1 <br /> Benzene ND 050 <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 <br /> Ethanol ND 100 <br /> Oyl Cert butyl ether ND 050 „ <br /> thylbenzene ND 050 <br /> Methyl Cert-butyl ether ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Dtchloroethane-d4 248 250 99 60-135 <br /> Laboratory Control Sample(5K1I031-BSI) Prepared&Analyzed 11/11/05 <br /> tent-Amyl methyl ether 150 050 ug/l 150 100 80-115 <br /> Benzene 4 82 050 5 16 93 65-115 <br /> tert-Butyl alcohol 145 20 143 101 75-150 <br /> Di-isopropyl ether 150 050 151 99 75-125 <br /> Ethanol 196 100 142 138 70-135 HL <br /> Ethyl ter(butyl ether 14 6 050 is 0 97 75-130 <br /> Ethylbenzene 696 050 754 92 75-135 <br /> Methyl tent-butyl ether 657 050 7 02 94 65-125 <br /> Toluene 342 050 372 92 85-120 <br /> Xylenes(total) 38 4 050 41 2 93 85-125 <br /> Gasoline Range Organics(C4-C12) 462 50 440 105 60-140 <br /> Surrogate 12-Dtchloroethane-d4 131 250 91 60-135 <br /> Sequoia Analytical-Morgan Hill The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> • This analytical report must be reproduced in its entirety <br /> Page 9 of I I <br />