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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma, 94954 <br /> (707)79 2-1865 <br /> a— ) Analytical wwseqFAX 7) labsco92 2 <br /> www sequn�afabs com <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P403188 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/12/04 10 17 <br /> Industrial Solvents by EPA Method 8015B modified <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Lcmtt Units Dilution Batch Prepared Analyzed Method Nates <br /> VW-1(P403188-01)Water Sampled 03/08/04 06 07 Received 03/10/04 08 00 <br /> Methanol ND 1500 ugll 1 4C17009 03/17/04 03/17/04 EPA 8015Bm R-03 <br /> Surrogate 1-pentanol 984% 62-129 " <br /> VW-2(P403188-02)Water Sampled 03/08/04 03 53 Received 03/10/04 08 00 <br /> Methanol ND 100 ug11 I 4C17009 03/17/04 03/17/04 EPA 8015Bm <br /> Surrogate 1 pentanol 996% 62-119 <br /> VW-3(P403188-03)Water Sampled 03/08/04 05 20 Received 03/10/04 08 00 <br /> Methanol ND 1500 ug11 1 4C17009 03/17/04 03/17/04 EPA 8015Bm R-03 <br /> Surrogate 1 pentanol 912% 61-129 <br /> VW4(P403188-04)Water Sampled 03/08/04 06 30 Received 03/10/04 08 00 <br /> Methanol ND 100 ug/l I 4C17009 03/17/04 03/17/04 EPA 8015Bm <br /> Surrogate 1 pentanol 110% 62-129 " <br /> &W-5(P403188-05)Water Sampled 03/08/04 03 47 Received 03/10/04 08 00 <br /> Methanol ND 100 ugA I 4C17009 03/17/04 03/17/04 EPA 8015Bm <br /> Surrogate I pentanol 944% 62-129 " <br /> VW-7(P403188-06)Water Sampled 03/08/04 07 33 Received 03/10/04 08 00 <br /> Methanol ND 100 ug/1 1 4C17009 03117!04 03/17/04 EPA 8015Bm <br /> Surrogate 1 pentanol 968% 62-129 " <br /> VW-8(P403188-07)Water Sampled 03/08/04 04 47 Received 03/10/04 08 00 <br /> Methanol ND 200 ug/1 I 4C17009 03/17/04 03/17/04 EPA 8015Bm R-03 <br /> Surrogate 1 pentanol 106% 62-129 " " <br /> 11 <br /> Sequoia Analytical-Petaluma 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 werght basis <br /> • <br /> This analytical report must be reproduced in its entirety <br /> Page 3 of 34 <br />