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,y e) <br /> Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical FAX(707)7920342 <br /> www sequoialahs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P309112 <br /> 3017 Kilgare Road Suite 100 Project Number 30732 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 09/16/03 18 59 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8015B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> [Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> EW-5(P309112-01)Water Sampled 09/05/03 12 17 Received 09/05/03 14 10 <br /> Gasoline Range Organics 4800 250 ug/l 5 3090279 09/12/03 09/12/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofl'uorobenzene 91 % 65-135 " <br /> EW4(P309112-02)Water Sampled 09/05/03 03 02 Received 09/05/03 14 10 <br /> Gasoline Range Organics 37000 5000 ug/l 100 3090279 09/12/03 09/12/03 EPA HC 19 <br /> 8015B-VOA <br /> Surrogate 4-BromoJluorobenzene 91% 65-135 " <br /> EW-3(P309112-03)Water Sampled 09/05/03 10 58 Received 09/05/03 14 10 <br /> Gasoline Range Organics 3600 250 ug/l 5 3090279 09/12/03 09/12/03 EPA <br /> 8015B-VOA <br /> Surrogate 4-BromoJluorobenzene 93% 65-135 " <br /> EW-7(P309112-04)Water Sampled 09/05/03 02 29 Received 09/05/03 14 10 <br /> asoline Range Organics 74000 10000 ug/l 200 3090279 09/12/03 09/12/03 EPA HC 19 <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 <br /> Sequoia Analytical-Petaluma The results to this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 3 of 11 <br />