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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (1) (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> . www scquotalabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2186,Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Projeet Number NIA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/18/01 13 43 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporhng Spike Source %REC RPD <br /> Analyte Resuit Limit Units Level Result 0/.RFC Limas RPD Limit Notes <br /> Batch 1100082.-EPA 5030B(Pfr) <br /> Blank(1100082-13LKl) Prepared&Analyzed 10/05/01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-7rifluorotoluene 8 77 100 87 7 60-140 <br /> LCS(1100082-BS1) Prepared&Analyzed 10/05/01 <br /> Benzene 9 75 050 ugA 10 0 97 5 70-130 <br /> Toluene 9 38 050 100 93 8 70-130 <br /> Ethylbenzene 9 37 0 50 10 0 937 70-130 <br /> Xylenes(total) 28 0 0 50 30 0 93 3 70-130 <br /> Surrogate a a a-Trifluorotoluene 9 13 100 91 3 60-140 <br /> Matrix_Spike(1100082-MSI) _ Source 5109421-05 Prepared&Analyzed 10/05/01 <br /> Benzene 9 89 0 50 ugA 10 0 ND 98 9 60-140 <br /> Toluene 9 45 0 50 10 0 ND 945 60 140 <br /> Ethylbenzene 944 050 100 ND 944 60-140 <br /> Xylenes(total) 280 0 50 300 ND 93 3 60-140 <br /> Surrogate a a a-Trifluorotoluene 9 34 100 934 60-140 <br /> Matrix Spike Dup(1100082-MSDI) Source S109421-05 Prepared&Analyzed 10/05/01 <br /> Benzene 9 61 0 50 ug/l 100 ND 96 1 60-140 2 87 25 <br /> Toluene 9 23 050 100 ND 92 3 60-140 2 36 25 <br /> Ethylbenzene 9 10 050 100 ND 91 0 60-140 3 67 25 <br /> Xylenes(total) 27 2 050 30 0 ND 90 7 60-140 2 90 25 <br /> Surrogate a a a Trifluorotoluene 933 100 93 3 60-140 <br /> Sequoia Analytical -Sacramento The i esults in this i epa 1 apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical repot must be reproduced in its entirery <br /> Page Page 10 of 13 <br />