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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-%W <br /> Analytical <br /> FAX 921scoo <br /> wwww sequoialabom ' <br /> • <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA ' <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/20/01 18 00 - <br /> Total Purgeable Hydroear_bon, BT_EX_and_MTBE by D_H_S 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 1080124-EPA 5030B(WOH) <br /> Blank(1080124-BLKI) Prepared&Analyzed 08/09/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 , <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) - --- ND 050 Y <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene II 6 100 116 60-140 T <br /> LCS(1080124-BSI) _ __ Prepared&Analyzed 08/09/01 <br /> Benzene 101 0 50 ugll too 101 70-130 <br /> Toluene 10 2 0 50 100 102 70-130 <br /> Ethylbenzene 102 050 100 102 70-130 <br /> Xylenes(total) 290 050 300 96 7 70-130 <br /> Methyl tent-butyl ether 105 25 " 100 105 70-130 <br /> Surrogate a a a-Trifluorotoluene 121 10 0 121 60-140 <br /> Matrix Spike(1080124-MS 1) _ __ _Source 5108053-09 Prepared&Analyzed 08/09/01 <br /> Benzene 838 050 uglt 100 ND 83 8 60-140 <br /> Toluene _ 938 050 10 0 057 - 88 1 60-140 ' <br /> Ethylbenzene 9 10 050 " too ND 910 60-140 <br /> Xylenes(total) 264 050 300 064 859 60-140 <br /> Methyl tert-butyl ether 10 8 2 5 100 ND 108 60-140 <br /> Surrogate a,a,a-Trifluorololuene 103 100 103 60-140 <br /> Matrix Spike Dup(1080124-MSD1) Source 8108053-09 Prepared&Analyzed 08/09/01 <br /> Benzene 927 050 ug/I 100 ND 92 7 60-140 lot 25 1 <br /> Toluene 101 0 50 100 057 953 60-140 739 25 <br /> Ethylbenzene 981 0 50 100 ND 981 60-140 751- 25 <br /> Xylenes(totalert-b) ��--- 283 050 300 922 60-140 695 25 -- --- ' <br /> Methyl tent-butyl ether 101 2 S 100 ND ND 101 60-140 670 25 <br /> Surrogate a a a-Triuorololuene 123 100 123 60-140 <br /> l <br /> Sequoia Analytical yt1CAl- S;1:CratilCnt! The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety , <br /> Page 8 of 13 ' <br />