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Sequoia 1455 McDowell Blvd,North Ste <br /> Petaluma, 949544 <br /> (707)79 2-1865 <br /> Iwo Anal FAX(707) 42 <br /> uryvwseguoialalabs.cs.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 t0116103 19:28 <br /> Conventional Chemistry Parameters by APHA/EPA Methods <br /> Sequoia Analytical-Petaluma <br /> Reporling <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5(P309139-05)Water Sampled:09/09/03 07:30 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 20000 20000 ugli 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 1100000 10000 3090315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon 990 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> MW-6(P309139-06)Water Sampled:09/09/03 06:50 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 150000 20000 ug/l 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron 250 t00 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 740000 10000 3090315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon 9100 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> MW-7(P309139-07)Water Sampled:09/09/03 02:48 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 22000 20000 ug/1 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Orrous 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 810000 10000 3090315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon 810 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <br /> MW-8(P309139-08)Water Sampled:09/09/03 03:53 Received:09/09/03 10:20 <br /> Chemical Oxygen Demand 110000 20000 ugll 1 3090556 09/24/03 09/24/03 EPA 410.4 <br /> Ferrous Iron 790 100 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 890000 10000 3090315 09/15/03 09/15/03 EPA 160.1 <br /> Total Organic Carbon 5900 800 4 3090300 09/15/03 09/15/03 EPA 415.1 <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 18 of 38 <br />