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1455 McDowell Blvd,North Ste D <br /> ( 4 Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> D-DA nalytiCai FAX(707)792-0342 <br /> • www.sequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P312283 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 01/12/04 18:12 <br /> Ferrous Iron by Hach method 814611;10 Phenanthroline Method <br /> Sequoia Analytical -Morgan Hill <br /> Repotting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Motes <br /> MW-1 (P312283-01)Water Sampled: 12/10/03 08:09 Received: 12/10/03 10:42 <br /> Ferrous iron 220 100 ug/1 1 3L30020 12/11/03 12/11/03 Hach Co.8146 HT-04 <br /> MW-2(P312283-02)Water Sampled: 12/10/03 08:37 Received: 12/10/03 10:42 <br /> Ferrous Iron ND 100 ug/1 I 3L30020 12/11/03 12/11/03 Hach Co. 8146 HT-04 <br /> MW-3(P312283-03)Water Sampled: 12/10/03 08:23 Received: 12/10/03 10:42 <br /> Ferrous Iron 100 100 ug/l 1 3L30020 12/11/03 12/11/03 Hach Co. 8146 HT-04 <br /> MW-4(P312283-04)Water Sampled: 12/10/03 07:55 Received: 12/10/03 10:42 <br /> Ferrous iron 130 100 ug/l 1 3L30020 12/11/03 12/11/03 Hach Co. 8146 HT-04 <br /> MW-5(P312283-05)Water Sampled: 12/10/03 07:22 Received: 12/10/03 10:42 <br /> Ferrous Iron ND 100 ugll 1 3L30020 12/11/03 12/11/03 Hach Co. 8146 HT-04 <br /> MW-6(P312283-06)Nater Sampled: 12/10/03 06:50 Received: 12/10/03 10:42 <br /> Gerrous Iron 120 100 ug/1 1 3L30020 12/11/03 12/11/03 Hach Co.8146 HT-04 <br /> 1W-7(P312283-07)Water Sampled: 12/10/03 04:27 Received: 12/10/03 10:42 <br /> Ferrous Iron ND 100 ugR I 3L30020 12/11/03 12/11/03 Hach Co.8146 HT-04 <br /> MW-8(P312283-08)Water Sampled: 12/10/03 05:25 Received: 12/10/03 10:42 <br /> Ferrous Iron 3700 1000 ug/1 10 3L30020 12/11/03 12/11/03 Hach Co.8146 HT-04 <br /> MW-9(P312283-09)Water Sampled: 12/10/0304:13 Received: 12/1010310:42 <br /> Ferrous Iron ND 100 ug/1 1 31,30020 12/11/03 12/11/03 Hach Co.8146 HT-04 <br /> Sequoia <br /> quoia Analytical-Petaluma The results in 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 40 <br />