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819 Striker Avenue Suite 8 <br /> Sequoia <br /> qu o i a Sacramento CA 99600 <br /> X7 {g 16}9Z 1-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr Ste 550 ProjectNumber ARCO 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 11/19/01 14 48 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporung Spike Source °/6REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1110095- EPA 5030B (P/T) <br /> Blank(1110095-BLKI) Prepared&Analyzed 11/07/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Triuorotoluene 992 100 992 60-140 <br /> LCS(1110095-BSI) Prepared&Analyzed 11/07/01 <br /> Benzene 994 050 ug/l 100 984 70-130 <br /> Toluene 959 050 100 959 70-130 <br /> hylbenzene 974 0 50 100 974 70-130 <br /> lenes(total) 292 050 300 973 70-130 <br /> Surrogate a a a-Triuororoluene 103 100 103 60-140 <br /> Matrix Spike(1110095-MSI) ___ Source 5111076-03 Y Prepared&Analyzed 11/07/01 <br /> Benzene 129 050 ug/l 100 47 810 60-140 <br /> Toluene 928 050 100 ND 928 60-140 <br /> Ethylbenzene 947 050 100 ND 947 60-140 <br /> Xylenes(total) 289 050 300 ND 963 60-140 <br /> Surrogate a a a-Trifluoroioluene 939 100 939 60-140 <br /> Matrix Spike Dup(1_11_0095-MSD1) Source S111076-03 Prepared&Analyzed 11/07/01 <br /> Benzene 13 6 0 50 ug/l 100 47 890 60-140 606 25 <br /> Toluene 990 0 50 100 ND 990 60-140 647 25 <br /> Ethylbenzene 102 050 100 ND 102 60-140 742 25 <br /> Xylenes(total) 307 050 300 ND 102 60-140 604 25 <br /> Surrogate a a,a-Trifluorotoluene 9 70 �-�' 100 970 60-140 <br /> Aft <br /> equola Analytical- Sacramento The results in this report apply to the samples analyzed in accordance wuh the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> ,p Page 4 of 7 <br /> `ec3' <br />