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Suit <br /> S e o u o;a 819 Straker Avenue, 958 8 <br /> i Sacramento,CA 95834 <br /> (916)921-9600 <br /> • <br /> FAX ) <br /> Analytical wwwsequolalabscom <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 04/04/02 13 51 <br /> Total Purgeable Hydrocarbons and BTEX 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 2040001 -EPA 5030E (PIT) <br /> Blank(2040001-BLKI) Prepared&Analyzed 03/28/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tr:fluorotoluene 918 J00 918 60-140 <br /> LCS(2040001-BSJ) Prepared&Analyzed 03/28/02 <br /> Benzene 792 050 ug/l 100 792 70-130 <br /> Toluene 894 0 50 100 894 70-130 <br /> 0 ylbenzene 941 050 100 941 70-130 <br /> enes(total) 296 0 50 300 987 70-130 <br /> Surrogate a a a-Trifluorotoluene 986 100 986 60-140 <br /> Matrix Spike(2040001-MSI) _ Source S203382-09 Prepared 03/28/02 Analyzed 03/29/02 <br /> Benzene 805 0 50 ug/l 100 NO 805 60-140 <br /> Toluene 906 0 50 100 ND 906 60-140 <br /> Ethylbenzene 961 0 50 100 ND 96 1 60-140 <br /> Xylenes(total) 298 050 300 ND 993 60-140 <br /> Surrogate a a a-Trnfluorotoluene 662 100 662 60-140 <br /> Matrix Spike Dup(2040001-MSDI) Source S203382-09 Prepared 03/28/02 Analyzed 03/29/02 <br /> Benzene 794 050 ug/l 100 ND 794 60-140 1 38 25 <br /> Toluene 8 97 050 100 ND 897 60-140 0 998 25 <br /> Ethylbenzene 942 050 10 0 ND 942 60-140 200 25 <br /> Xylenes(total) 295 050 300 ND 983 60-140 101 25 <br /> Surrogate a a a-Trifluorotoluene 659 100 659 60-140 <br /> 4=116quoia,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 />