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• • 819 Striker Avenue Suite S <br /> Sequoia Sacram95834 <br /> (916)92 -96M <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs Corn <br /> Ir <br /> E <br /> International-Rancho Cordova Project Chevron 9-6171,Stockton,CA <br /> lgore Road, Suite 100 ProjettNumber 07743512251 Reported <br /> Cordova CA,95670 Project Manager Bill Brasher 07/12/01 18 32 <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 1070084- EPA 5030E (MeOH) <br /> Blank(1070084-BLKI) Prepared&Analyzed 07/09/01 _ <br /> Purgeable Hydrocarbons ND 10 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Triuorotoluene 0138 0200 119 60-140 <br /> LCS(1070084-BSI) Prepared&Analyzed 07/09/01 <br /> Benzene 0 191 00050 mg/kg 0200 95 5 70-130 <br /> Toluene 0209 00050 0200 104 70-130 <br /> Eth lbenzene 0 218 00050 0200 109 70-130 <br /> s(total) 0 608 00050 0 600 101 70-130 <br /> Surrogate a a a-Trri luorotoluene 0 249 0200 124 60-140 �TT <br /> Matrix Spike(1070084-MSI) Source 5106435-04 Prepared 07/09/01 Analyzed 07/10/01 <br /> Benzene 0 145 00050 mg/kg 0200 ND 725 60-140 <br /> Toluene 0 164 00050 0200 ND 820 60-140 <br /> Ethylbenzene 0 171 00050 0200 ND 85 5 60-140 <br /> Xylenes(total) 0 485 00050 0 600 0 018 77 8 60-140 <br /> Surrogate a a a-Triuorotoluene 0 188 " 0200 94 0 60-140 <br /> Matrix Spike Dup(1070084-MSD1) Source S106435-04 Prepared 07/09/01 Analyzed 07/10/01 <br /> Benzene 0 106 00050 mg/kg 0200 ND 53 0 60-140 31 1 25 zS-02 <br /> Toluene 0 126 00050 0200 ND 63 0 60-140 262 25 zS-02 <br /> Ethylbenzene 0 133 00050 0200 ND 665 60-140 250 25 <br /> Xylenes(total) 0 400 00050 0 600 0 018 63 7 60-140 192 25 <br /> Surrogate a a a-Trruorotoluene 0 128 0200 640 60-140 <br /> ola 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 7 of 13 <br />