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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95$34 <br /> (916)921 9600 <br /> FAX O Analytical eclu ala <br /> Nwww squ92 1 0100 <br /> oilabs coin <br /> 0 <br /> SECOR International-Rancho Cordova Project Former Chevron 9-8632,Tracy,CA <br /> 3017 Kilgore Road, Suite 100 Project Number 077 43506 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Bill Brasher 06/15/01 13 22 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limn Umis Level Result %REC Limits RPD Limit Notes <br /> Batch 1F04007- EPA 5030B McOH <br /> Blank(1F04007`BLKI) _Prepared 06/01/01 Analyzed 06/02/01 <br /> Purgeable Hydrocarbons ND 1 0 mg/k, <br /> Benzene ND 00050 <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Triuorotoluene 0 71 060 120 40-140 <br /> Blank(1F04007-BLK2) Prepared&Analyzed 06/05/01 <br /> Purgeable Hydrocarbons ND 1 0 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> ]benzene ND 00050 " <br /> es(total) ND 00050 " <br /> Surrogate a,a,a-Trifluorotoluene 077 060 130 40-140 <br /> LCS(1F04007-BS1) Prepared 06/01/01 Analyzed 06/02/01 _ <br /> Benzene 079 00050 mg/kg 080 99 50-150 <br /> Toluene 084 00050 0 80 100 50-150 <br /> Ethylbenzene 088 00050 0 80 110 50-150 <br /> Xylenes(total) 26 00050 24 110 50-150 <br /> Surrogate a a a-Triuorotoluene 069 060 120 40-140 <br /> LCS(1F04007-BS2) Prepared&Analyzed 06/05/01 _ <br /> Benzene 084 00050 mg/kg 0 80 100 50-150 <br /> Toluene 088 00050 0 80 110 50-150 <br /> Ethylbenzene 091 00050 0 80 110 50-150 <br /> Xylenes(total) 27 00050 24 110 50-150 <br /> Surrogate a a a-Triuorotoluene 079 060 130 40-140 <br /> ola Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytrcal report must be reproduced in its entirety <br /> Page 16 of 20 <br />