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Sequo � 819 acro entoAvenue Suite 4 <br /> � 4.� Sacramento CA 95834 <br /> (9 16)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequolalabs Com <br /> WOR <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168,Stockton,CA <br /> 3330 Cameron Park Dr ProjectNumber NIA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/02/01 15 32 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %R-EC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1020236-EPA 5030B (PIT) <br /> Blank(1020236-BLKi) _ Prepared&Analyzed 02/22/01 <br /> Purgeable Hydrocarbons Nle 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Surrogate a a a-Trtfluorotoluene 862 1100 862 60-140 <br /> L.CS(1020236-BSI) Prepared&Analyzed 02/22/01 <br /> Benzene 843 0 500 ugl] 100 843 70-130 <br /> Toluene 881 0 500 100 88 1 70-130 <br /> Ethylbenzene 909 0 500 100 909 70-130 <br /> nes(total) 270 0 500 300 900 70-130 <br /> gate a a a Trtfluorotoluene 832 100 832 60-140 <br /> _Matrix Spike(1020236-MSI) _ _ Source S102233-07 Prepared&Analyzed 02/22/01 ___ <br /> Benzene 343 0 500 ugll 100 269 740 60-140 <br /> Toluene 150 0 500 100 5 19 981 60-140 <br /> Ethylbenzene 145 0 500 100 487 96 3 60-140 <br /> Xylenes(total) 46 1 0 500 300 175 95 3 60-140 <br /> Surrogate a a a-Trtfluorotoluene 991 100 991 60-140 <br /> Matrix Spike Dup(1020236-MSDI) _ Source S102233-07 _Prepared&Analyzed 02/22/01 <br /> Benzene 356 0 500 ug/l 100 269 870 60-140 372 25 <br /> Toluene 151 0 500 100 519 991 60-140 0 664 25 <br /> Ethylbenzene 145 0 500 100 487 963 60-140 0 25 <br /> Xylenes(total) 461 0 500 300 17 5 95 3 60-140 W_0 25 <br /> Surrogate a a a-Trrfluorotoluene 102 �" _ 100 102 60-140 <br /> oia Analytical-Sacramento The results in thrs report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reprodacer'in its ertirety <br /> Page 11 of 16 <br />