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. 8f9 Striker Avenue,Suite 8 <br /> 1 Sacramento CA 95834 <br /> ® IL (9 16)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequolalabs corn <br /> Delta Environmental Consultants(Cameron Park) Protect Arco 6100,Tracy,CA <br /> 3330 Cameron Park Or Ste 550 ProjectNumber 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Prolect Manager Jay Johnson 04109/02 l6 49 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LiTFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %FEC RK) <br /> Analyte Result Limit Units Level Result "/0REC Limits RPD Llmlt Notes <br /> Batch 2040001 -EPA 5030B (P/T) <br /> Blank(2040001-BLKI) Prepared&Analyzed 03/28/02 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 918 100 91 8 60-140 <br /> LCS(2040001-BSI) Prepared&Analyzed 03/28/02 <br /> Benzene 792 050 ugll 100 792 70-130 <br /> Toluene 894 050 100 894 70-130 <br /> �hylbenzene 4 41 0 50 " 10 0 94 1 70-130 <br /> leases{total) 24 6 0 50 30 0 98 7 70-130 <br /> Surrogate aaa-7`nfluorotoluene 9 86 10 Q 9$6 60-140 <br /> Matrix Spike(2040001-MST) Source 5203382-09 Prepared 03/28/02 Analyzed 03/29/02 <br /> Benzene 805 050 ug/1 100 ND 805 60-140 <br /> Toluene 906 050 100 ND 906 60-140 <br /> Ethylbenzene 961 050 100 ND 96 1 60-140 <br /> Xylenes(total) 298 050 300 ND 993 60-140 <br /> Surrogate a a a-Trifluorotoluene 662 100 662 60-140 <br /> Matrix Spike D (2040001-MSD1) Source S203382-09 Prepared 03/28/02 Analyzed 03/29/02 <br /> Benzene 794 050 ug/l 100 ND 794 60-140 139 25 <br /> Toluene 897 050 100 ND 997 60-140 0 998 25 <br /> Ethylbenzene 942 050 100 ND 942 60-140 200 25 <br /> Xylenes(total) 295 050 300 ND 983 60-140 101 25 <br /> Surrogate a a a-Trifluoroioluene 659 100 659 60-140 <br /> equoia 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 9 <br />