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Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> Analytical. (747)792-1865 <br /> ` FAX(707)792-0342 <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P406178 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: jay Johnson <br /> J S 06130/0413:08 <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-6(P406178-06)Water Sampled:06/08/04 08:22 Received:06/08/04 11:30 <br /> Total Dissolved Solids 630000 10000 ugll 1 4060261 06/10/04 06/10/04 EPA 160.1 <br /> Total Organic Carbon 2100 800 1. 4 4060317 06/14/04 06/14/04 EPA 415.1 <br /> MW-7(P406178-07)Water Sampled: 06108/0405:11 Received:06/08/0411;30 <br /> Chemical Oxygen Demand 36000 20000 ug/l 1 4060299 06/12/04 06/12/04 EPA 410.4 <br /> Ferrous Iron ND 100 4060229 06/09/04 06/09/04 SM 3500 Fe D HT-01 <br /> 19:47 <br /> Orthophosphate as P ND 50 4060390 06/09/04 06/09/04 EPA 365.3 <br /> 17:57 <br /> Total Dissolved Solids 540000 10000 4060261 06/10/04 06/10/04 EPA 160.1 <br /> Total Organic Carbon ND 800 4 4060317 06/14/04 06/14/04 EPA 415.1 <br /> QM-8(P406l78-08)Wnter Sampled:06/08/0406:11 Received:06/08/04 11:30 <br /> Chemical Oxygen Demand 67000 20000 ug/l 1 4060299 06/12/04 06/12/04 EPA 410.4 <br /> Ferrous lron 1100 100 4060229 06/09/04 06/09/04 SM 3500 Fe D HT-01 <br /> 19:47 <br /> Orthophosphate as P ND 50 " 4060390 06/09/04 06/09/04 EPA 365.3 <br /> 17:57 <br /> Total Dissolved Solids 840000 10000 " 4060261 06/10/04 06/10/04 EPA 160.1 <br /> Total Organic Carbon 4700 800 4 4060317 06/14/04 06/14/04 EPA 415.1 <br /> MW-9(P406178-09)Water Sampled:06/08/04 05:31 Received:06/08/04 11:30 <br /> Chemical Oxygen Demand ND 20000 ug/l 1 4060299 06/t2/04 06/12/04 EPA 410.4 <br /> Ferrous lron 350 100 4060229 06/09/04 06/09/04 SM 3500 Fe D HT-01 <br /> 19:47 <br /> Orthophosphate as P 52 50 4060390 06/09/04 06/09/04 EPA 365.3 <br /> 17:57 <br /> Total Dissolved Solids 700000 10000 4060261 06/10/04 06/10/04 EPA 160.1 <br /> Total Organic Carron TLD 800 4 4060317 06/14/04 06/14/04 EPA 415.1 <br /> MW-10(P406178-10)Water Sampled:06/08/04 06:26 Received:06/08/04 11:30 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the <br /> chain of custody document. Unless otherwise stated,results are reported on a wet <br /> weight basis. This analytical report must he reproduced in its entirety, <br /> Page l4 of 37 <br /> i <br />