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1 - <br /> Sequoia 819 Striker CA958 4 <br /> Sacramento,CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> • www sequoialabs win <br /> 1 <br /> Geological Technics,Inc Project.Montas Bros 5508570 <br /> 1101 7th Street Project Number 724 2 Reported <br /> Modesto CA,95354 Project Manager Geological Technics,Inc 09/09/05 16 21 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B18021B-Quality Control <br /> ' Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC fiPD <br /> Analytc Result Limit Units Level Result %REC Limits RPD limit Notes <br /> ' Batch 5090038-EPA 5030B 1 EPA 8015B/8021B <br /> Matrix Spike(5090038-MS1) Source S508570-01 Prepared&Analyzed 09/02/05 <br /> ' Benzene 103 050 110 100 ND 103 60-140 <br /> Benzene 103 050 NO ND 103 60-140 <br /> Toluene 998 050 100 ND 100 60-140 <br /> Toluene 998 050 100 ND 100 60-140 <br /> 1 Ethylbenzene 101 050 too ND 101 60-140 11 <br /> Ethylbenzene 101 050 100 ND 101 60-140 <br /> Xylenes(total) 297 050 300 ND 99 60-140 <br /> ' Xylenes(total) 297 050 n 300 ND 99 60-140 <br /> Methyl tert-butyl ether 105 20 too ND 105 60-140 <br /> Surrogate 4-BFB(FID) 780 100 78 60-140 <br /> Surrogate 4-BFB(FID) 780 100 78 60-140 <br /> Isur agate a a a-TFT(PID) 100 " 100 100 60-140 <br /> arrogate a a a-TFT(PID) 100 100 100 60-140 <br /> Matrix Spike DU (5090038-MSD1) Source S508570-01 Prepared&Analyzed 09/02/05 <br /> ' Benzene LO 5 050 ug/1 100 ND 105 60 140 2 25 <br /> Benzene 105 050 100 ND 105 60 140 2 25 <br /> Toluene 101 050 too ND 101 60-140 1 25 <br /> ' Toluene 101 050 100 ND 101 60-140 1 25 <br /> Ethylbenzene 101 050 100 ND 101 60-140 0 25 <br /> Etbylbenzene 101 050 100 ND 101 60 140 0 25 <br /> Xylenes(total) 298 050 300 ND 99 60 140 03 25 <br /> ' Xylenes(total) 298 050 " 300 ND 99 60 140 03 25 <br /> Methyl tent-butyl ether 108 20 100 ND 108 60 140 3 25 <br /> Surrogate 4-BFB(FID) 771 100 77 60-140 <br /> Surrogate 4-BFB(FID) 771 ,I 100 77 60-140 <br /> Surrogate a,a a-TFT(PID) 949 100 95 60-140 <br /> Surrogate a ez a-TFT(PID) 949 100 95 60140 <br /> 1 <br />' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> Tlris analytical report must be reproduced in its entirely <br /> Page 14 of 16 <br />