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. S• <br /> 4D Sequoia 885 Jarvis Dr <br /> Morgan Hill,CA 95037 <br /> • <br /> Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> www.soquoialabs.com <br /> Stratus Environmental Inc. Project: ARCO 45469,Stockton,CA MLL0827 <br /> 3330 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 01/07/03 13:36 <br /> Conventional Chemistry Parameters by APHA/EPA Methods <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 MLL0827-01 Water Sampled: 12/23/02 07:15 Received: 12/23/02 13:40 <br /> Total Alkalinity 790- 10 mg/1 2 2L30031 12/30/02 12/30/02 SM 23208 <br /> Chemical Oxygen Demand ND-" 30 1 21,30024 12/27/02 12/30/02 EPA 410.4 <br /> Dissolved Oxygen 2.88" 1.00 2L26038 12/23/02 12/23/02 EPA 360.1 <br /> Total Dissolved Solids 950-/ 10 21-31040 12/27/02 12/27/02 EPA 160.1 <br /> MW-2 MLL0827-02 Water Sampled: 12/23/02 06:55 Received:12/23/02 13:40 <br /> Total Alkalinity 380 ' 25 mg/I 5 2L30031 12/30/02 12/30/02 SM 2320B <br /> Chemical Oxygen Demand ND. 30 1 2L30024 12127!02 12/30/02 EPA 410.4 <br /> Dissolved Oxygen 4.69, 1.00 2L26038 12/23/02 12/23/02 EPA 360.1 <br /> Total Dissolved Solids 560., 10 " 2L31040 12/27/02 12/27/02 EPA 160.1 <br /> MW-4 MLL0827-03 Water Sampled: 12/23/02 07:35 Received: 12/23/02 13:40 <br /> Total Alkalinity 640 25 mg/1 5 2L30031 12/30!02 12/30/02 SM 23208 <br /> Chemical Oxygen Demand ND 30 1 2L30024 12/27/02 12/30/02 EPA 410.4 <br /> Dissolved Oxygen 1.75 1.00 2L26038 12/23/02 I2123/02 EPA 360.1 <br /> Total Dissolved Solids 950- 10 2L31040 12/27/02 12/27/02 EPA 160.1 <br /> MW-5 MLL0827-04 Water Sampled: 12/23/02 08:30 Received: 12/23/02 13:40 <br /> Total Alkalinity 620 25 mg/l 5 2L30032 12/30/02 12/30/02 SM 2320B <br /> Chemical Oxygen Demand 60 30 1 21,30024 12/27/02 12/30/02 EPA 410.4 <br /> Dissolved Oxygen 3.55. 1.00 21.26038 12/23/02 12/23/02 EPA 360.1 <br /> Total Dissolved Solids 1300. 10 21,31040 12/27/02 12/27/02 EPA 160.1 <br /> MW-7 MLL0827-05 Water Sampled: 12/23/02 08:00 Received: 12/23/02 13:40 <br /> Total Alkalinity 500 25 mg/1 5 21,30032 12/30/02 12/30/02 SM 2320E <br /> Chemical Oxygen Demand ND 30 1 2L30024 12/27/02 12/30/02 EPA 410.4 <br /> Dissolved Oxygen 3.64. 1.00 2L26038 12/23/02 12/23/02 EPA 360.1 <br /> Total Dissolved Solids 1400- l0 2L31040 12/27/02 12/27/02 EPA 160.1 <br /> Sequoia Analytical-Morgan Hill 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 muss be reproduced in its entirety. <br /> Page 4 of 18 <br /> f <br />