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S I E R R A <br /> AMALYTICAL <br /> Shaw Environmental&Infiastructure,Inc Project Don Rogers <br /> 1326 N Market Blvd #1 Project Number 8800391A/01020000 Reported. <br /> Sammento CA,95834 Project Manager David Herzog 04/10/03 14 19 <br /> BTEX/MTBE/TVPH-Gasoline Range Hydrocarbons(C4-C12)by EPA Method 8021B and 8015B in senes-Quality Control <br /> Sierra Analytical Labs,Inc. <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limn Umts Level Result %REC Limps RPD Limn Notes <br /> Batch 113D0914-EPA 5030D P&T <br /> Blank(B3D0914-BLKI) Prepared&Analyzed 04/09/03 <br /> Benzene ND 016 ppm- <br /> Toluene ND 013 " <br /> Ethylbenzene ND 012 " <br /> Xylenes(total) ND 0 12 " <br /> Methyl tett-butyl ether ND 14 <br /> Gasolmc Range Hydrocarbons(C4-C12) ND 12 " <br /> Surrogate a,a a-Tri luorotoluene 249 335 743 70-125 <br /> LCS(B3DO914-BS1) Prepared&Analyzed 04/09/03 ' <br /> Benzene 107 016 ppmv 125 856 80-120 <br /> Toluene 918 013 106 866 80-120 <br /> Ethylbe—we 910 012 923 986 80-120 <br /> Gasoline Range Hydrocarbons(C4-C 12) 165 12 147 112 80-120 <br /> Duplicate(B3D0914-DUPI) Source 0304094-01 Prepared&Analyzed 04/09/03 <br /> Benzene ND 016 ppmv ND 30 <br /> Toluene ND 013 ND 30 <br /> Ethylbenzene ND 012 ND 30 <br /> Gasolme Range Hydrocarbons(C4-C 12) ND 12 ND 30 , <br /> 01 The results in this report apply to the samples analyzed in accordance with the chain ofewtody document nis analytical report must be reproduced in Its entirety <br /> 26052 MERIT CIRCLE SUITE 105, LAGUNA HILLS, CALIFORNIA 92653 , <br /> TELEPHONE (949) 348-9389 FAx (949) 348-9115 <br /> E-MAIL SIERRALABS @ SIERALABS NET Page 3 of 4 <br />