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985 Jarvis Drive <br /> Sequoia MorganHill CA 95637 <br /> (40 <br /> (468)776 9600 <br /> Analytical FAXciluo 782 corn <br /> www sequoralabs corn <br /> 0 <br /> ETIC Engineering Inc-Pleasant Hill(Exxon) Project Exxon 7-3942 MOL0952 <br /> 2285 Morello Avenue Project Number Exxon 7-3942 Reported <br /> Pleasant Hill CA,94523 Project Manager Ted Moise 01/16/06 15 09 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B - Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Evaluation Spike Source %REC RPD <br /> Analyte Result Lirmt Units Level Result %RFC Lirmts RPD Lirmt Notes <br /> Batch 6A04017-EPA 5030E P/T <br /> Matnx Spike(6A04017-MSI) Source MOL0827-04 Prepared&Analyzed 01/04/06 <br /> Gasoline Range Organics(C4-C 12) 163 50 ugA 275 ND 59 55-130 <br />' Benzene 190 0 50 " 4 10 ND 46 75-150 QM02 <br /> Toluene 182 050 207 ND 88 80-115 <br /> Ethylbenzene 4 42 0 50 4 85 ND 91 75-115 <br /> Xylenes(total) 257 050 23 8 PFD 108 75-115 <br /> Surrogate a a a-Trzfluorotoluene 813 800 101 80-110 <br /> Surrogate 4-Bromofluorobenzene 794 " 800 99 80-110 <br /> Matrix Spike Dnp(6A04017-MSDI) Source MOL0827-04 Prepared&Analyzed 01/04/06 <br /> Gasoline Range Organics(C4-C12) 158 50 ug11 275 ND 57 55-130 3 35 <br /> Wluene 187 050 4 10 ND 46 75-150 2 25 QM02 <br /> ene 17 9 050 207 ND 86 80-115 2 25 <br /> Ethylbenzene 431 050 " 485 ND 89 75-115 3 25 <br /> Xylenes(total) 25 1 0 50 ry 238 ND 105 75-115 2 25 <br /> Surrogate a a a-Trifluorotoluene 821 800 103 80-120 <br /> Surrogate 4-Bromofluorobenzene 793 800 99 80-110 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> 0 custody document Unless otherwise stated results are reported on a wet weight basis This <br /> analytical report must be reproduced in its entirety <br /> Page 23 of 31 <br />