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i <br /> 1455 McDowell Blvd,North Ste 4 <br /> Sequoia rca'(';o;CA <br /> i�sbs <br /> 3 Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P309471 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P EIartb 10/16/03 11 59 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8015B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Lunn Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-1(P309471-09)Water Sampled 09/24/03 06 47 Received 09/24/03 08 30 <br /> Gasoline Range Organics 51 50 ug/l 1 3100089 10/04/03 10/04/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 84% 65-135 " <br /> VW-2(P309471-10)Water Sampled 09/24/03 02 21 Received 09/24/03 08 30 <br /> Gasoline Range Organics 110 50 ug/l 1 3100089 10/04/03 10/04/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65435 " <br /> VW-3(P309471-11)Water Sampled 09/24/03 05 18 Received 09/24/03 08 30 <br /> Gasoline Range Organics ND 50 ug/l 1 3100089 10/04/03 10/04/03 EPA <br /> 801533-VOA <br /> Surrogate 4-Bromofluorobenzene 94% 65-135 " <br /> VW-4(P309471-12)Water Sampled 09/24/03 05 35 Received 09/24/03 08 30 <br /> -Gasoline Range Organics ND 50 ugll 1 3100089 10/04/03 10/04/03 EPA <br /> 8015B VOA <br /> Surrogate 4-Bromofluorobenzene 96% 65-135 <br /> VW-5(P309471-13)Water Sampled 09/24/03 02 10 Received 09/24/03 08 30 <br /> Gasoline Range Organics 110 50 ug/l 1 3100089 10/04/03 10/04103 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> VW-7(P309471-14)Water Sampled 09/24/03 06 00 Received 09/24/03 08 30 <br /> Gasoline Range Organics ND 50 ugfl 1 3100089 10/04/03 10/04/03 EPA <br /> 801533-VOA <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> VW-8(P309471-15)Water Sampled 09/24/03 03 23 Received 09/24/03 08 30 <br /> Gasoline Range Organics 1900 50 ug/l I 3100089 10/04/03 10/04/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 94% 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 stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 30 <br />