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• 404 N VAget Lane <br /> Sequoia Walnut Geek C 94598 <br /> (925)98e 8-9600_9600 <br /> FAX(925)988-9673 <br /> Analytical www sequolalabs corn <br /> rDubhin <br /> er Ryan,Inc -Dublin Project Chevron <br /> Sierra Court Suite] Protect Number Chevron#1 9-625$ Reported <br /> CA 94568 Project Manager Deanna L Harding 30-Apr-01 11 39 <br /> BTEX+MTBE by EPA Method 8021B <br /> Great Lakes Analytical <br /> Reporting <br /> Analyte Result Lunt Units Dilution Batch Prepared Analyzed Method Notes <br /> TBLB(W 1042.97-01)Water Sampled 12-Apr-01 00 00 Received 12-Apr-Ol 16 20 <br /> Benzene ND 0 500 ug/1 1 1040414 22-Apr-01 23-Apr-Ol EPA 8021B <br /> Toluene ND 2 00 " <br /> Ethylbenzene ND 0 500 " <br /> Total Xylenes ND 200 " <br /> Methyl tert-butyl ether ND 0 500 " <br /> Surrogate 4-BFB 915% 860-142 " <br /> MW-1 (W104297-02)Water Sampled 12-Apr-010845 Received 12-Apr-01 1620 <br /> Benzene ND 0 500 ugli 1 1040414 22-Apr-01 23-Apr-01 EPA 8021B <br /> Toluene ND 2 00 " <br /> Ethylbenzene ND 0 500 " <br /> Total Xylenes ND 200 " <br /> Methyl tert-butyl ether ND 0 500 " <br /> rrogate 4-BFB 960% 860-142 " <br /> -2(W104297-03)Water Sampled 12-Apr-01 09 15 Received 12-Apr-01 16 20 <br /> Benzene ND 0 500 ugll 1 1040414 22-Apr-Ol 23 Apr-01 EPA 8021B <br /> Toluene ND 2 00 " <br /> Ethylbenzene ND 0 500 " <br /> Total Xylenes ND 2 00 " <br /> Methyl tert-butyl ether ND 0 500 " <br /> Surrogate 4-BFB 101 % 860-142 " <br /> MW-3(W104297-04)Water Sampled 12-Apr-01 09 39 Received 12-Apr-01 16 20 <br /> Benzene ND 0 500 ug/l 1 1040414 22-Apr-01 23-Apr-01 EPA 8021$ <br /> Toluene ND 200 ^ <br /> Ethylbenzene ND 0 500 " <br /> Total Xylenes ND 200 " <br /> Methyl tert-butyl ether ND 0 500 " <br /> Surrogate 4-BFB 935% 860-142 " <br /> ola Analytical-Walnut Creek Tice results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4of11 <br />