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/�1 885 Jarvis Drive <br /> �/��r- _�,j Sequoia Morgan Fidl CA 95037 <br /> iW FAX Analytical `408)7769500 <br /> (408)782-5308 <br /> www sequoialabs coni <br /> URS Corporation[Arcot] Project BP Heritage#11194,Tracy,CA MOE0217 <br /> 2870 Gateway Oaks Dr,Ste 300 Protect Number G07WZ-0011 Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 05/19/05 16 42 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Limits RPD Linut Notes <br /> Batch 5E12009-EPA 5030B PIT 1 EPA 8260B <br /> Blank(5E12009-BLK1) Prepared&Analyzed 05/12/05 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND so " <br /> Di-isopropyl ether ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4 C12) ND 50 " <br /> Surrogate 1,1-Dichloroethane-d4 517 500 105 60-135 <br /> Laboratory Control Sample(5E12009-BSI) Prepared&Analyzed 05/12/05 <br /> tert-Amyl methyl ether 101 050 ug/l 100 101 80-115 <br /> Benzene 9 05 050 100 90 65-115 <br /> tert-Butyl alcohol 510 20 500 102 75-150 <br /> Di-isopropyl ether 104 050 100 104 75-125 <br /> Ethanol 128 100 200 64 70-135 HM <br /> Ethyl tert-butyl ether 103 050 100 103 75-130 <br /> Ethylbenzene 957 050 100 96 75-135 <br /> Methyl tent-butyl ether 102 050 100 102 65-125 <br /> Toluene 925 050 100 92 85-120 <br /> Xylenes(total) 291 050 300 97 85-125 <br /> Surrogate 12-D:chloroethane-d4 462 500 92 60-135 <br /> Laboratory Control Sample(5E12009-BS2) Prepared&Analyzed 05/12/05 <br /> Benzene 526 050 ug/l 608 87 65-115 <br /> Ethylbenzene 7 85 050 7 84 100 75-135 <br /> Methyl tert-butyl ether 100 050 960 104 65-125 <br /> Toluene 351 050 329 107 85-120 <br /> Xylenes(total) 400 050 38 5 104 85-125 <br /> Gasoline Range Organics(C4-C 12) 433 50 440 98 70-124 <br /> Surrogate 11-Dichloroethane-d4 536 500 107 60-135 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 10 <br />