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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento.CA 95834 <br /> 4 (916)921-9600 <br /> FAX(916)921-0100 <br /> a- ) <br /> Analytical �seguotalabs corn <br /> 4 <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA S210535 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Rtsse 11/12/02 16 29 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporung Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2100387-EPA 5030B PIT <br /> Blank(2100387-BLKI) Prepared&Analyzed 10/25/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Tris luorotoluene 108 100 108 60-140 <br /> Blank(2100387-BLK3) Prepared&Analyzed 10/29/02 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 0 50 <br /> Qlbi.ezene ND 0 50 ND 0 50 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 104 100 104 60-140 <br /> Blank(2100387-BLK4) Prepared&Analyzed 10/30/02 _ <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 101 100 102 60-140 <br /> Blank(2100387-BLK5) Prepared&Analyzed 10/31/02 <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Triuorotoluene 964 100 96 60-140 <br /> uota Analytical-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 entirety <br /> Page 6 of 11 <br />