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• <br /> Sequoia 819 Sacramento CA 95834 <br /> (916) 921-9600 <br /> Analytical FAX 921-0100 <br /> FAX <br /> sequequotalabs corn <br /> Delta Environmental Consul tants(Cameron Park) Project Arco 6I00,Tracy,CA <br /> 3330 Cameron Park Dr Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 02/23/01 16 00 <br /> Total Purgeable Hydrocarbons (C6-C12) 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 No, <br /> Batch 1020143- EPA 5030B(P/T) <br /> Blank(1020143-BL,KI) Prepared&Analyzed 02/14/01 <br /> Purgeable Hydrocarbons ND 500 ngA <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-Tri/7uorotoluene 113 100 113 60-140 <br /> LCS(1020143-BSI) Prepared&Analyzed 02/14/01 <br /> Benzene 974 0 500 ug/l 100 974 70-130 <br /> Toluene 103 0 500 100 103 70-130 <br /> lbenzene 11 1 0 500 100 111 70-130 <br /> es(total) 290 0 500 300 96 7 70-130 <br /> Surrogate aaa-Triuorotoluene 114 100 114 60-140 <br /> Matrix Spike(1020143-MSI) Source 5102163-02 Prepared&Analyzed 02/14/01 <br /> Benzene 973 0 500 ugtl 100 ND 973 60-140 <br /> Toluene 105 0 500 100 ND 105 60-140 <br /> Ethylbenzene 11 1 0 500 100 ND 111 60-140 <br /> Xylenes(total) 294 0 500 300 ND 980 60-140 <br /> Surrogate a a a-Triuorotoluene 116 100 116 60-140 <br /> Matrix Spike Dup(1020143-MSDI) Source S102163-02 Prepared&Analyzed 02/14/01 <br /> Benzene 9 87 0 500 ug/l 100 ND 98 7 60-140 143 25 <br /> Toluene 107 0 500 100 ND 107 60-140 189 25 <br /> Ethylbenzene 112 0 500 100 ND 112 60-140 0 897 25 <br /> Xylenes(total) 297 0 500 300 ND 990 60-140 1 02 25 <br /> Surrogate a a a-Tris luorotoluene 115 100 115 60-140 <br /> oia Analytical - Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />