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Se n u o�� S l9 Striker Avenue,Suite <br /> N3 Sacramento,CA 958344 <br /> cz- <br /> (916)921-9600 <br /> Analytical FAX equo 9abs.co21 0 <br /> J�/ wwwseduoialabs.con-= <br /> elta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 05/01/01 13:08 <br /> Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RBC RPD <br /> Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1040352-EPA 5030E(PIT) <br /> Blank(1040352-BLK1) Prepared&Analyzed:04/26/01 <br /> Purgeable Hydrocarbons ND 10.0 mg/ml Air <br /> Benzene ND 0.0500 " <br /> Toluene ND 0.0500 " <br /> Ethylbenzene ND 0.0500 - <br /> Xylenes(total) ND 0.0500 " <br /> Methy[tert-butyl ether ND 0.500 " <br /> Surrogate:a,a,a-Trifluorotoluene 2.02 200 101 60-140 <br /> LCS(1040352-BSI) Prepared&Analyzed:04/26/01 <br /> Benzene 1,90 0.0500 tng/m'Air 2.00 95.0 70-130 <br /> Toluene 1.95 0.0500 2.00 97.5 70-130 <br /> Ethylbenzene 1.99 0.0500 2,00 99.5 70-130 <br /> es(total) 6.13 0.0500 6.00 102 70-130 <br /> 1 tent-butyl ether 1.96 0.500 2.00 98.0 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 2.00 2.00 100 60-140 <br /> LCS Dup(1040352-BSD1) _ Prepared&Analyzed:04/26/01 <br /> Benzene 1.59 0.0500 mg/m3 Air 2.00 79.5 70-130 17.8 25 <br /> Toluene 1.62 0.0500 2.00 81.0 70-130 18.5 25 <br /> Ethylbenzene 1.64 0.0500 2.00 82.0 70-130 19.3 25 <br /> Xylenes(total) 5.09 0.0500 6.00 84.8 70-130 18.5 25 <br /> Methyl ten-butyl ether 2.00 0.500 " 2.00 100 70-130 2.02 25 <br /> Surrogate:a,a,a-Trifluorotoluene 1.73 2.00 86.5 60-140 <br /> Sequoia Analytical-Sacramento The results in 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 4 of 6 <br />