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885 Jarvis Dr <br /> Sequoia MorganHi8,CA95037 <br /> (408)776-9600 <br /> a— ) <br /> Analytical FAX(408)782-6308 <br /> WWW seyuoialabs can <br /> 10 Stratus Environtnental Inc Project ARCO#2130 MLL0778 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/08/03 1149 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units bevel Result %REC Litntts RPD Limit Notes <br /> Batch 2120503-EPA 5030B(PPI) <br /> Blank(2120503-BLKI) Prepared&Analyzed 12/30/02 <br /> Purgeable Hydrocarbons PFD 50 ug/l <br /> Benzene PFD 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) PFD 050 " <br /> Surrogate a,a,a-Trifluorotoluene 106 100 106 60-140 <br /> Blank(2120503-BLK2) Prepared&Analyzed 12/31/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzenc ND 050 " <br /> iXylenes(total) ND 050 " <br /> Surrogate a a a-Tris luorotoluene 106 100 106 60-140 <br /> Laboratory Control Sample(2120503-BS]) Prepared 12/30/02 Analyzed 12/31/02 <br /> Benzene 105 050 ug/1 100 105 70-130 <br /> Toluene 100 050 100 100 70-130 <br /> Ethylbenzene 955 050 100 96 70-130 <br /> Xylenes(total) 29 1 050 300 97 70-130 <br /> Surrogate a a a-Triuorotoluene 105 100 705 60-140 <br /> Laboratory Control Sample(2120503-BS2) Prepared&Analyzed 12/31/02 <br /> Benzene 106 050 ug/I 100 106 70-130 <br /> Toluene 103 050 100 103 70-130 <br /> Ethylbeozene 110 050 100 110 70-130 <br /> Xylenes(total) 327 0 50 300 109 70-130 <br /> Surrogate aaa-Tnfluorotoluene 108 100 108 60-140 <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 /> 0 This analytical report must be reproduced in its entirety <br /> Page 7 of 11 <br />