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S I E R R A <br /> ANALYTICAL <br /> Shaw Envuonmental&lnfirastructure,Inc Project Don Rogers <br /> 1326 N Market Blvd.#1 Project Number 8800391A/01020000 Reported <br /> Sacramento CA,95834 Project Manager David Herzog 03/14/03 09 20 <br /> B1T,X/MTBE/TVPH Gasoline Range Hydrocarbons(C4-C12)by EPA Method 3021B and 8015B m series-Quality Control <br /> Sierra Analytical Labs,Inc. <br /> Reporting Spike SoUce %REC RPD <br /> analyte Result L=t units 1--vol Result °/9RPC Lumts RPA L=t Nates <br /> Batch WC1210-EPA 5030B P&T <br /> Blank(B3C1210-BLKI) Prepared&Analyzed 03/12/03 <br /> Benzene ND 016 ppmv m <br /> Toluene NU 013 , <br /> Etbylbenzene ND 012 " <br /> Xylenes(total) ND 012 " <br /> Methyl tett-butyl ether ND 14 <br /> Gasoline Range Hydrocarbons(C4-C 12) ND 12 " <br /> Surrogate a,a,a-Tri luorotoluene 313 335 934 70-125 <br /> LCS(B3C1210-BS1) Prepared&Analyzed 03/12/03 , <br /> Benzene 126 016 ppmv 125 101 80-120 <br /> Toluene 108 013 " 106 102 80-120 <br /> Bthy a 106 012 923 115 80-120 <br /> Gasohne Range Hydrocarbons(C4-C12) 129 12 147 $78 80-120 <br /> Duplicate(B3C1210-DUP1) Source:0303112-01 Prepared&Analyzed 03/12/03 <br /> Bene 0 409 0 16 ppmv 030 200 30 <br /> Toluene 201 013 22 903-30 <br /> Etbylbenzene 0 268 012 " 026 303 30 <br /> Gasoline Range Hydrocarbons(C4-C12) 450 12 50 105-30 , <br /> The results in this report apply to the samples analyzed to accordance with the churn of custody document nrs analytical report must be reproduced to its entirety <br /> 26052 MERIT CIRCLE SUITE 105, LAGUNA h ins, CALIFORNIA 92653 ' <br /> TELEPHONE (949) 348-9389 FAx (949) 348-9115 <br /> E-MAIL SIERRALABS @ SIERALABS NET Page 3 of 4 <br />