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i <br /> SequoSequoia 819 Striker Avenue,Suite 8 <br /> ia Sacramento, CA 95834 <br /> (916) 921-9600 <br /> Analytical FAX(916)92 1-0100 <br /> J fAX <br /> I3Delta Environmental Consultants(Cameron Park) Project: ARCO 5469, Stockton, CA <br /> 330 Cameron Park Dr, Project Number: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 41/08/01 10:32 <br /> Total Purgeable Hydrocarbons (C6-C12), 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 0120179-EPA 5030B(PIT) <br /> Blank(0120179-BLK1) Prepared&Analyzed; 12/15/00 <br /> Purgeable Hydrocarbons ND --50.0 ug/l -- - - <br /> Benzene ND 0.500 " <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Methyl tert-butyl ether ND 2,50 ^ <br /> Surrogate:a,a,a-Triuorotoluene 12.3 10.0 123 60-140 <br /> LCS(0120179-BSI) _- Prepared&Analyzed: 12/15/00 <br /> Benzene 11.4 0.500 u ] 30.0 <br /> I14 70-130 <br /> Toluene 11.4 0.500 10,0 114 70-130 <br /> 6lbenzene 11:5 0.500 10.0 115 70-130 <br /> y <br /> nes(total) 35.2 0,500 36.0 117 70-I30 <br /> Methyl tcrt-butyl ethcr 9.52 2.50 10.0 95.2 70-130 <br /> Surrogate:a,a,a-.Trrj crotoluene -„ -.- <br /> 12.6 10.0 126 60-140 <br /> Matrix Spike(0120179-MSI) _WT Source:5012130-09 Prepared&Analyzed: 12/15/00 <br /> Benzene 9.37 0.500 ug/l 10.0 ND 93.7 50-I40 <br /> Toluene 9.63 0.500 10,0 ND 96.3 60-140 <br /> Ethylbenzene 10.1 0.500 10.0 ND 101 60-140 <br /> Xylenes(total) 29.3 0.500 " 30.0 ND 97.7 60-140 <br /> Methyl tert-butyl ether 5.72 2,50 10.0 ND 57.2 60-140 <br /> Q-02 <br /> Surrogate:a,a,a-Trrfluoroioluene 11,9 10.0 119 60-140 <br /> Matrix Spike Dup(0120179-MSD1)__ �_ _ Source:5012130-09 Prepared&Analyzed: 12/15/00 <br /> Benzene 11.7 0.500 ug/l 10.0 ND 117 60-140 22,1 25 <br /> Toluene 11.8 0.500 10.0 ND 118 60-140 20.3 25 <br /> Ethylbenzene 11.7 0.500 10.0 ND 117 60-140 14.7 25 <br /> Xylenes(total) 36.3 0.500 30.0 ND 121 60-140 21.3 25 <br /> Methyl tert-butyl ether 11.1 2.50 10.0 ND 111 60-140 64.0 25 <br /> Surrogate:a,a,a-Trilluorololuene 11.710.0 117 60-140 Q-02 <br /> �uoia Analy€ical -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 entirely. <br /> Page 9of14 <br />