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° +� 819 Striker Avenue,Suite 8 <br /> k <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-01o0 <br /> j--� !�/ www.sequolalabs.com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 5469, Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 03/06/02 13:43 <br /> Total Purgeable Hydrocarbons and BTEX by IHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> LA..Iyl,-- Result Limit Chits Level Result %REC Limits RPD Limit Notes <br /> Batch 2030023-EPA 5030B (P/T) <br /> Matrix Spike(2030023-MSI) Source: 5202314-02 Prepared:02/28/02 Analyzed: 03/01/02 <br /> Benzene 9.05 0.50 ug/l 10.0 ND 86.4 60-140 <br /> Toluene 11.0 0.50 10.0 3.3 77.0 60-140 <br /> Ethylbenzene 9.57 0.50 10.0 0.64 89.3 60-140 <br /> Xylcnes(tots]) 29.4 0.50 30.0 4.2 84.0 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 8.82 10.0 88.2 60-140 <br /> Matrix Spike Dup(2030023-MSD1) __ Source: S202314-02 Prepared:02/28/02 Analyzed:03/01/02 <br /> Benzene 9.08 0.50 ug/l 10.0 ND 86.7 60-140 0.331 25 <br /> Toluene 11.1 0.50 10.0 3.3 78.0 60-140 0.905 25 <br /> Ethylbenzene 9.67 0.50 10.0 0.64 90.3 60-140 1.04 25 <br /> ylenes(total) 29.5 0.50 30.0 4.2 84.3 60-140 0.340 25 <br /> rrogate:a,a a-Trifluorotoluene 9.18 " 10.0 91.8 ff-14/ <br /> Batch 2030049-EPA 5030B (PIT) <br /> BIank(2030049-BLKI) Prepared&Analyzed: 03/04/02 <br /> Purgeable Hydrocarbons ND 50 ugA <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-Tris luorotoluene 10.3 10.0 103 60-140 <br /> LCS(2030049-BSI) Prepared&Analyzed:03/04/02 <br /> Benzene 9.84 0.50 ug/l 10.0 98.4 70-I30 <br /> Toluene 10.0 0.50 10.0 100 70-130 <br /> Ethylbenzene 10.3 0.50 10.0 103 70-130 <br /> Xylenes(total) 29.2 0.50 30.0 97.3 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 10.7 10.0 107 60-140 - <br /> Ah <br /> equoia 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 10 of 15 <br />