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1 <br /> 819 Striker Avenue Suite 8 <br /> S e qts o 1 a Sacramento CA 95834 <br /> (916)921-9600 <br /> 4D— FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> w <br /> Delta Environmental Consultants(Cameron Park) Pro}ect ARCO 2186, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 07/05/01 12 49 <br /> Total Purgeable Hydrocarbons (C&C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporung Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1070019-EPA 5030B(P/T) <br /> Blank(1070019-BLKI) Prepared&Analyzed 07/02/01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Tr fluorotoluene 104 zoo 104 60-140 <br /> LCS(1070019-BSI) Prepared&Analyzed 07/02/01 <br /> Benzene 837 0 50 ugll 100 83 7 70-130 <br /> Toluene 9 27 0 50 too 927 70-130 <br /> Ethylbenzene 9 88 0 50 100 98 8 70-130 <br /> lenes(total) 29 9 0 50 300 997 70-130 <br /> urrogate a a,a-Trifluorotoluene 108 100 108 60-140 <br /> Matrix Spike(1070019-MSI) Source 5106396-04 Prepared&Analyzed 07/02/01 <br /> Benzene 803 0 50 ugll 100 ND 803 60-140 <br /> Toluene 896 0 50 100 ND 89 6 60-140 <br /> Ethylbenzene 9 57 0 50 100 ND 957 60-140 <br /> Xylenes(total) 271 050 300 ND 903 60-140 <br /> Surrogate a,a,a-Triuorotoluene 103 100 103 60-140 <br /> Matrix Spike Dup(1070019-MSD1) Source S106396-04 Prepared&Analyzed 07/02/01 <br /> Benzene 826 0 50 ug/1 100 ND 82 6 60-140 282 25 <br /> Toluene 920 0 50 100 ND 920 60-I40 2 64 25 <br /> Ethylbenzene 986 0 50 100 ND 986 60-140 299 25 <br /> Xylenes(total) 28 7 0 50 300 ND 95 7 60-140 5 73 25 <br /> Surrogate a a a-Triy7uorotoluene 105 100 105 60-140 <br /> quota 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 6of10 <br />