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819 Striker Avenue,Suite 8 <br /> 4D (916)921-9600 <br /> Sequoia Sacramento,CA 95834 <br /> 1W Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> OECOR International-Rancho Cordova Project Arco 6020,Manteca,CA <br /> 3017 Kilgore Road,Suite 100 PmJect Number' 6020,Mateca,CA Reported <br /> Rancho Cordova CA,95670 Project Mamiger Rusty Benkosky 01/09/02 18 10 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE 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 2010053-EPA 5030E PIT <br /> Blank 2010053-BLK1 Prepared&Analyzed 01/03/02 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl Cert-butyl ether ND 2 5 " <br /> Surrogate a a a-Tr!fluorotoluene 848 100 84 8 60-140 <br /> LCS 2010053-BS1 Prepared&Analyzed 01/03/02 <br /> Benzene 9 16 0 50 ug/l 10 0 91 6 70-130 <br /> Toluene 9 17 0 50 " 10 0 91 7 70-130 <br /> Ethylbenzene 9 12 0 50 to 0 91 2 70-130 <br /> Genes(total) 277 0 50 M 30 0 923 70-130 <br /> hyl tert-butyl ether 8 35 2 5 10 0 83 5 70-130 <br /> Surrogate a,a a-TriJluorotoluene 9 79 100 979 60-140 <br /> Matra Spike 2010053-MS1 Source S112387-02 Pre ared 01/03/02 Analyzed OI/04/02 <br /> Benzene 7 35 0 50 ug/l 100 ND 73 5 60-140 <br /> Toluene 7 19 0 50 too ND 71 9 60-140 <br /> Ethylbenzene 652 050 ]0 0 ND 652 60-140 <br /> Xylenes(total) 202 0 50 300 ND 673 60-140 <br /> Methyl tert-butyl ether 808 25 10 0 ND 808 60-140 <br /> Surrogate a,a,a-TriJluorotoluene 612 100 612 60-140 <br /> Matnz Spike Dup(2010053-MSDI) Source 5112387-02 PTeared 01/03/02 Analj+zed 01/04/02_ <br /> Benzene 869 0 50 ug/l 100 ND 86 9 60-140 167 25 <br /> Toluene 847 050 10 0 ND 847 60-140 163 25 <br /> Ethylbenzene 7 85 0 50 10 0 ND 78 5 60-140 185 25 <br /> Xylenes(total) 25 5 0 50 30 0 ND 850 60-140 23 2 25 <br /> Methyl tert-butyl ether 8 64 2 5 100 ND 864 60-140 670 25 <br /> Surrogate a,a a-Trifluorotoluene 7.33 100 73 3 60-140 <br /> 46 uoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 6 of 8 <br />