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TN Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> Anal (916)921-9600 <br /> ytical FAX(916)921-0100 <br /> www sequoialabs com <br /> Stratus Environmental Project ARCO 548, Stockton, CA <br /> 3330 Cameron Park Drive, Ste 550 Project Number N/A Sampled 6/26/Q0 <br /> Cameron Park,CA 95682 Protect Manager Jay Johnson Received 6/27/00 <br /> Reported 7/12/00 <br /> Total Purgeable Hydrocarbons(C6-CX2)and BTEX by DHS;LUFT /Quallty-Control <br /> Sequoia Analytical-Sacramento Ir <br /> Date Spike Sample <br /> Analyte QC Reporting Lima Recov RPD RPD <br /> Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0070069 Date Prepared 7110100 <br /> Blank Extraction Method EPA 50308 McOH <br /> Purgeable Hydrocarbons /10 064-BLKI <br /> 7 <br /> Benzene 7/10100 ND ug/l 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a a,a-Ti iflunrotoluene - ND 0 500 <br /> IO 0 <br /> 106 600-140 106 <br /> LCS 0070069-BSI <br /> Benzene 7110/00 100 <br /> Toluene 101 ug/1 700-130 101 <br /> Ethylbenzene „ i 0 0 102 70 0-13 0 102 <br /> Xylenes(total) „ 103 700-130 103 <br /> Surrogate a,a,a-Trxfluorotoluene30 0 30 7 700-130 IO2 <br /> A&— " 10 0 10 2 60 0-I40 10Z <br /> S ike 0070069-MSI 5006359-03 <br /> Benzene 7/10/00 <br /> Toluene 10 Q ND 960 ug/I 600-140 96 0 <br /> Ethylbenzene 100 ND 967 600-140 967 <br /> Xylenes(total) 100 ND 991 600-140 991 <br /> Surrogate a a,a-Trrfluorotoluene 300 ND 295 " 600-140 983 <br /> 100 965 600-140 965 � <br /> Matrtx S ike Daa 0070069-MSD1 S006359-03 <br /> Benzene 7/10/00 100 <br /> Toluene ND 975 ug/l 600-140 975 25 0 155 <br /> Etta lbenzene <br /> 0 ND 972 600-140 972 25 0 0 516 <br /> y <br /> Xylenes(total) 100 ND 996 30 0 '� 600-140 996 25 0 0 503 <br /> Surrogate a a a-Ti tfluo otoluene ND 297 600-140 990 25 0 0 710 <br /> 100 9 78 60 0-140 97 8 <br /> q alytica] -Sacramento <br /> Refer to end of report for text of notes and deflwnona <br /> Page 6 of 8 <br />