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•) Y1 <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 9 <br /> (916)922 9600 i 9600 <br /> FAX(916)921 0100 <br /> Analytical www sequotalabs com <br /> *10 <br /> SECOR International-Rancho Cordova Project Chevron 9-1452, Ripon,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43545 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Scott Gable 08/23/01 15 33 <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 Levct Result %REC Limits RPD Limit Notes <br /> Batch 1080021 -LPA 5030E(P/T) <br /> Blank(1080021-BLKI) Prepared&Analyzed 07/31/01 <br /> Purgeable Hydrocarbons ND 50 ugfl <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 11.4 loo 114 60-140 T - _— <br /> LCS(1080021-BSI) Prepared&Analyzed 07/31/01 <br /> Benzene 10 6 050 ug/l Wo 106 70-130 <br /> i <br /> Toluene 10 3 050 10 0 103 70-130 <br /> Et enzene 954 050 10 0 954 70-130 <br /> s(total) 309 0 50 300 103 70-130 <br /> Surrogate a a a-Triuorotoluene 115 100 115 60-140 <br /> Matrix Spike(1080021-MS1) Source S107288-02 Prepared&Analyzed 07/31/01 <br /> Benzene l0 1 050 ug/1 100 ND 101 60-140 <br /> Toluene 970 050 100 1 0 870 60-140 <br /> Ethylbenzene 904 050 100 054 850 60-140 <br /> Xylenes(total) 295 050 300 3 0 893 60-140 <br /> Surrogate a a a-Tri luorotoluene 113 100 113 60-140 <br /> Matrix Spike Dup(1080021-MSD1) Source 5107288-02 Prepared&Analyzed 07/3 1/0 1. <br /> Benzene 973 050 ug/1 10 0 ND 973 60-140 3 73 25 <br /> Toluene 9 16 050 10 0 to 816 60-140 5 73 25 <br /> Ethylbenzene 8 59 050 100 054 805 60-140 5 10 25 <br /> Xylenes(total) 283 0 50 300 3 0 843 60-140 4 15 25 <br /> Surrogate a,a a-Tri luorotoluene 989 100 98 9 60-140 <br /> ola Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody documew This analylical report must be reproduced to its entirety <br /> Page 13 of 22 <br />