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1455 McDowell Blvd,forth Ste D <br /> a— ) Sequoia Petaluma,CA 94954 <br /> (707)792-1665 <br /> Analytical <br /> FAX(707)792-0342 <br /> www sequoialahs cam <br /> URS Corp-Sacramento Project Arco Site 6020,Manteca,CA P502227 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/26/05 14 14 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result 1,im1I Units Dilution Batch Prepared Analyzed Method Nate <br /> MW-5(P502227-01)Water Sampled 02/11/05 15 30 Received 02/14/0510 50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug(l 1 5020229 02/16/05 02/16/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 80-110 " <br /> MW-6(P502227-02)Water Sampled 02/11/05 14 50 Received 02/14/05 10 50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5020229 02/16/05 02/16/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 80-110 " <br /> MW-7(P502227-03)Water Sampled 02/11/05 15 20 Received 02/14105 10 50 <br /> Gasoline Range Organics(C4-C12) ND 50 ugll 1 5020229 02/16/05 02/16/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 97% 80-110 " <br /> MW-8(P502227-04)Water Sampled 02/11/05 15 00 Received 02/14/05 10 50 <br /> Gasoline Range Organics(C4-C]2) ND 50 ug/l 1 5020229 02/16/05 02/16/05 FPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 97% 80-110 " <br /> •MW-9(P502227-05)Water Sampled 02/11/05 12 25 Received 02/14/05 10 50 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA 1 5020229 02/16/05 02/16/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 80-110 " <br /> MW-10(P502227-06)Water Sampled 02/11/05 15 10 Received 02/14/05 10 50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5020229 02/16/05 02/16/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 98% 80-110 " <br /> MW-11 (P502227-07)Water Sampled 02/11/05 15 40 Received 02/14/05 10 50 <br /> Gasoline Range Orgamcs(C4-Cl2) ND 50 ug/l 1 5020229 02/16/05 02/16/05 EPA 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 95% 80-110 11 11 11 " <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 5 of 18 <br />