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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> City of Stockton Project: Fuel AnayseS on Water Samples/Mormon Slough <br /> 2500 Navy Dr. Project Number: NIA Reported: <br /> Stockton CA,95206 Project Manager: Larry Huber 09/07/01 17:00 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %R.EC limits RPD Limit Notes <br /> Batch 1090017- EPA 5030E(PIT) <br /> Stank(1090017-BLK1) Prepared&Analyzed:08/31/01 <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,o.a-TriJ7uorotoluene 7.97 10.0 79.7 60-140 <br /> LCS(1090017-BSI) Prepared&Analyzed:08/31/01 <br /> Benzene 9.29 0.50 ugtl 10.0 92,9 70-130 <br /> Toluene 8.82 0.50 10.0 88.2 70-I30 <br /> Ethylbenzene 9.22 0.50 10.0 92.2 70-I30 <br /> Xylenes(total) 26.9 0.50 30.0 89.7 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 8.95 10.0 89.5 60-140 <br /> Matrix Spike(1090017-MSI) Source: 5108291-01 Prepared&Analyzed:08/31/01 <br /> Benzene 9.01 0.50 ug/l 10.0 ND 90.1 60-140 <br /> Toluene <br /> 9.16 0.50 10.0 ND 91.6 60-140 <br /> Ethylbenzene 9.91 0.50 10.0 ND 99.1 60-140 <br /> Xylenes(total) 29.6 0.50 30.0 ND 98.7 60-140 <br /> Surrogate:a,a,a-Triuorotoluene 9.6.3 10.0 96.3 60-140 <br /> Matrix Spike Dup(1090017-MSDI) Source:S108291-01 Prepared&Analyzed:08/31/01 <br /> Benzene 9.49 0.50 ug/l 10.0 ND 94.9 60-140 5.19 25 <br /> Toluene 9.79 0.50 10.0 ND 97.9 60-140 6.65 25 <br /> Ethylbenzene 1 10.4 0.50 10.0 ND 104 60-140 4,83 25 <br /> Xylenes(total) 30.2 6.50 30.0 ND 101 60-140 2.01 25 <br /> Surrogate:a,a,a-Trifluorotoluene 9.41 10.0 94.1 60-140 <br /> i <br /> Soquoja Analytical - Sacramento The results in this report apply to the samples amalyz'ed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br />�I <br /> Page 7 of 13 <br /> 1 <br />