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885 Jarvis Dr <br /> ' Sequoia Mcrgn Hill,CA 95037 <br /> TACp Analytical (408)776-9600 <br /> FAX(446)782-6308 <br /> www.se quoialabs.can <br /> tus Environmental Inc. Project: ARCO#5469,Stockton,CA MMA0406 <br /> 0 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 02/11/03 14:07 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEX by EPA 8021B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 MMA0406-01 Water Sampled:01/14/03 07:47 Received: 01/14/03 10:30 HT-04 <br /> Gasoline Range Organics(C6-C10) ND 50� ug/l 1 31304002 02/04/03 02/04/03 8015Bm/8021B <br /> Benzene ND 0.50V " <br /> Toluene 0.56✓ 0.50 " <br /> Ethylbenzene ND 0.50/ <br /> Xylenes(total) ND 0.50/ " <br /> Surrogate:a,a,a-Trifluorotoluene 106% 55-142 " <br /> MW-2(MMA0406-02)Water Sampled:01/14/03 08:54 Received:01/14/03_10:30 <br /> Gasoline Range Organics(C6-C10) ND 501 ug/1 1 3A22004 01/22/03 01/22/03 8015Bm/8021B <br /> Benzene ND 0.50/ " <br /> Toluene ND 0.50/ <br /> Ethylbenzene ND 0.50 J " <br /> Xylenes(total) ND 0.501 " <br /> Surrogate:a,a,a-Trifluorotoluene 112% 55-142 <br /> b&V-3 MMA0406-03 Water Sam led:01/14/03 08:33 Received:01/14/03 10:30 <br /> Wine Range Organics(C6-C10) ND 501 ug/1 1 3A28002 01/28/03 01/28/03 6015Bm/8021B <br /> Benzene ND 0.50, " <br /> Toluene ND 0.50' <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 ✓ " <br /> Surrogate: a,a,a-Triuorotoluene 95.9% 55-142 " " " <br /> MW-4 MMA0406-04)Water Sampled:01/14/03 07:36 Received:01/14/03 10:30 <br /> Gasoline Range Organics(C6-C10) 9500 2500 ug/1 50 3A28002 01/28/03 01/28/03 8015Bm/8021B HC-12 <br /> Benzene 1900 25 <br /> Toluene ND 25J " <br /> Ethylbenzene ND 25' <br /> Xylenes(total) ND 251 " <br /> Surrogate: a,a,a-Trifluorotoluene 99.4% 55-142 " <br /> oia 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 must be reproduced in its entirety. <br /> 3 of 34 <br />