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eD <br /> Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX equ 921-0100 <br /> Y wwwsequoialabs.com <br /> Delta Environmental Co nsultants(C ameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 07/03/01 10:27 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike' Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1060274-EPA 5030B(P/T <br /> Blank(1060274-BLKI) Prepared&Analyzed:06/28/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <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-Truorotoluene 10,9 10.0 109 60-140 <br /> LCS(1060274-BSI) Prepared&Analyzed:06/28/01 <br /> Benzene 9.38 0,50 ug/l 10.0 93.8 70-130 <br /> Toluene 9.59 0.50 10.0 95.9 70-130 <br /> Ethylbenzene 10.1 0.50 10.0 101 70-130 <br /> es(total) 30.4 0.50 " 30.0 101 70-130 <br /> ogate:a,a,a-Tris luorotoluene 10.3 10.0 103 60-140 <br /> Matrix Spike(1060274-MSI) Source: 5106297-10 Prepared&Analyzed:06/28/01 <br /> Benzene 9.29 0.50 ugll 10.0 ND 92.9 60-140 <br /> Toluene 9.36 0.50 " 10.0 ND 93.6 60-140 <br /> Ethylbenzene 9.74 0.50 10.0 ND 97.4 60-140 <br /> Xylenes(total) 28.7 0.50 30.0 ND 95.7 60-140 <br /> Surrogate:a,a,a-Trifiuorotoluene 10.2 10.0 102 60-140 <br /> Matrix Spike Dup(1060274-MSDI) Source: S106297-10 Prepared&Analyzed:06/28/01 <br /> Benzene 9.87 0.50 ugA 10,0 ND 98.7 60-140 6.05 25 <br /> Toluene 10.3 0.50 10.0 ND 103 60-140 ?.56 25 <br /> Ethylbenzene 10,7 0.50 10.0 ND 107 60-140 9.39 25 <br /> Xylenes(total) 32.1 0.50 30.0 ND 107 60-140 11.2 25 <br /> Surrogate:a,a,a-Trifluorotoluene 11.2 10.0 112 60-140 <br /> oia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document. This analytical reporl must be reproduced in its entirety. <br /> Page 6 of 10 <br />