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Sequoia <br /> McDowell Blvd,North Ste D <br /> SellUla Petaluma, 94954 <br /> (707)79 2-1865 <br /> Analytical FAX(707)labs.c 42m <br /> www.sequuiaabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P309139 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 10/16/03 19:28 <br /> Conventional Chemistry Parameters by APHA/EPA Methods <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-9(P309139-09)Water Sampled:09/09/03 03:31 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 26000 20000 ug/I 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron ND 100 3090363 09/09/03 09/09/03 SM 3500 Fe D <br /> Orthophosphate as P ND 50 3090231 09/10/03 09/10/03 EPA 365.3 <br /> Total Dissolved Solids 770000 10000 3090373 09/16/03 09/16/03 EPA 160.1 <br /> Total Organic Carbon ND 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> MW-10(P309139-10)Water Sampled:09/09/03 04:17 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 22000 20000 ugll 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron ND 100 3090363 09!09/03 09/09/03 SM 3500 Fe D <br /> Orthophosphate as P ND 50 3090231 09/10/03 09/10/03 EPA 365.3 <br /> Total Dissolved Solids 710000 10000 3090373 09/16/03 09/16/03 EPA 160.1 <br /> Total Organic Carbon 1800 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> The results in this report apply to the samples analyzed in accordance with the chain of <br /> Sequoia Analytical-Petaluma p PpY p Y <br /> • cuslody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety, <br /> Page 19 of 38 <br />