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1455 McDowell Blvd North Ste P <br /> Sequoia Petaluma,CA 94954 <br /> 4D (707)792-1865 <br /> Analytical FAX 792-0342 <br /> FAX <br /> sequoiuotala6s coni <br /> (i <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P403188 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/12/04 10 17 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-1 (P403188-01)Water Sampled 03/08/04 06 07 Received 03/10/04 08 00 <br /> Gasoline Range Organics(C6-C10) 770 50 ug/l 1 4030397 03/15/04 03/15/04 EPA <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> VW-2(P403188-02)Water Sampled 03/08/04 03 53 Received 03/10/04 08 00 <br /> Gasoline Range Orgamcs(C6-CIO) 93 50 ug/l 1 4030397 03/15/04 03/15/04 EPA <br /> 8015E-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> VW-3(P403188-03)Water Sampled 03/08/04 05 20 Received 03/10/04 08 00 <br /> Gasoline Range Organics(C6-C10) 580 50 ug/l 1 4030397 03/15/04 03/15/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 96% 65-135 " <br /> VW4(P403188-04)Water Sampled 03/08/04 06 30 Received 03/10/04 08 00 <br /> asoline Range Organics(C6-C70) 1200 50 ug/I 1 4030397 03/15/04 03/15/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> VW-5(P403188-05)Water Sampled 03/08/04 03 47 Received 03/50/04 08 00 <br /> Gasoline Range Organics(C6-C10) 150 50 ug/1 1 4030397 03/15/04 03/15/04 EPA <br /> 80156,VOA <br /> Surrogate 4-Bromofluorobenzene 91% 65-135 <br /> VW-7(P403188-06)Water Sampled 03/08/04 07 33 Received 03/10/04 08 00 <br /> Gasoline Range Organics(C6-C10) 59 50 ug/I 1 4030397 03/15/04 03/15/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> VW-8(P403188-07)Water Sampled 03/08/04 04 47 Received 03/10/04 08 00 <br /> Gasoline Range Organics(C6-C10) 1500 50 ug/l t 4030397 03/15/04 03/15/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> Sequoia Analytical-Petaluma 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 /> ` Thts analytical report must be reproduced in its entirety <br /> Page 7 of 34 <br />