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Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> eDAX(747)792-1865 <br /> Analytical Fw.sequ ialabs om <br /> 1, wwwsequoial abs,com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P309139 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: W 836605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 10/16/03 19:28 <br /> Conventional Chemistry Parameters by APHAIEPA Methods <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (P309139-01)Water Sampled:09/09/03 06:13 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand ND 20000 ugA 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron 1500 100 3090363 09/09/03 09/09/03 SM 3500 Fe D <br /> Orthophosphate as P 260 50 3090231 09/10/03 09/10/03 EPA 365.3 <br /> Total Dissolved Solids 950000 10000 3690315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon 1400 800 4 3090306 09/15/03 09/15/03 EPA 415.1 <br /> MW-2(P309139-02)Water Sampled:09/09/03 05:09 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand ND 20000 ug/l 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron ND t00 3090363 09/09/03 09/09/03 SM 3500 Fe D <br /> Orthophosphate as P 59 50 3090231 09/10/03 09/10/03 EPA 365.3 <br /> Total Dissolved Solids 600000 10000 3090315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon ND 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> MW-3(P309139-03)Water Sampled:09/09/03 05:44 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand ND 20000 ug/1 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Orrrous Iron ND 100 3090363 09/09/03 09/09/03 SM 3500 Fe D <br /> thophosphate as P ND 50 3090231 09/10/03 09/10/03 EPA 365.3 <br /> Total Dissolved Solids 1400000 10000 3090315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon 1400 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> MW4(P309139-04)Water Sampled:09/09/03 08:05 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 84000 20000 ug/1 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron 6600 200 2 3090363 09/09/03 09/09/03 SM 3500 Fe D <br /> Orthophosphate as P 53 50 1 3090231 09/10/03 09/10/03 EPA 3653 <br /> Total Dissolved Solids 870000 10000 1. " 3090315 09/15/03 09115!03 EPA 160.1 <br /> Total Organic Carbon 5500 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 /> duoia Analytical-Petaluma P PPY P Y <br /> custody document. Unless otherwise stated,results are reported an a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 17 of 38 <br />