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a19 Striker Avenue Suite 8 <br /> Sequoia SaCt amen CA 5834 <br /> (9 6)921.9600 <br /> IDFAX(916)921-0100 <br /> Analytical www sequoialabs Corn <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 06/26/02 16 50 <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 2060302-EPA 5030B P/T <br /> Blank(2060302-BLKI) Prepared&Analyzed 06/24/02 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a a a-Trruorotoluene 103 100 103 60-140 <br /> LCS(2060302-BS1) Prepared&Analyzed 06/24/02 <br /> Benzene 980 050 ug/l 100 98 70-130 <br /> Toluene 102 0 50 100 102 70-130 <br /> benzene <br /> 101 050 100 101 70-130 <br /> ties(total) <br /> 309 050 300 103 70-130 <br /> Methyl tent-butyl ether 11 1 25 100 ill 70-130 <br /> Surrogate a a a-Trifluorotoluene 106 100 106 60-140 <br /> Batch 2060333-EPA 50308 P/T <br /> Blank(2060333-BLKI) Prepared&Analyzed 06/26/02 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 996 1019 100 60-140 <br /> uola Analytical-Sacramento The results rn this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 7 <br />