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Sequoia 404 N wiLane <br />1 4 (925) 988-9600 <br />Walnut Creek CAA 94598 <br />D - <br />Analytical FAX (925) 988-9673 <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Barbara Sleminskr 29 -Dec -99 08 52 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />knalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 9L27004 Prepared 27 -Dec -99 <br />Using EPA 5030B [MeOH] <br />0 600 <br />101 40-140 <br />Blank (9L27004-BLKI) <br />Matrix Spike Dup (9L27004 -MSD 1) <br />Source <br />W912427-35 <br />Purgeable Hydrocarbons <br />ND <br />10 <br />mg/kg <br />00050 mg/kg <br />0 800 <br />ND <br />124 50-150 <br />Benzene <br />ND <br />00050 <br />" <br />00050 <br />0 800 <br />ND <br />126 50-150 <br />Toluene <br />ND <br />00050 <br />" <br />00050 <br />0 800 <br />ND <br />126 50-150 <br />Ethylbenzene <br />ND <br />00050 <br />" <br />00050 <br />240 <br />ND <br />119 50-150 <br />Xvlenes (total) <br />ND <br />00050 <br />" <br />Surrogate a, a a-Tr�fluorotoluene <br />0 698 <br />0 600 <br />116 <br />40-140 <br />LCS (9L27004 -BSI) <br />Benzene <br />0 908 <br />00050 <br />mg/kg <br />0 800 <br />113 <br />50-150 <br />Toluene <br />0 920 <br />00050 <br />0 800 <br />115 <br />50-150 <br />Ethylbenzene <br />0 926 <br />00050 <br />0 800 <br />116 <br />50-150 <br />Xylenes (total) <br />2 67 <br />00050 <br />240 <br />Ill. <br />50-150 , <br />Surrogate a a a -Tri luorotoluene <br />0 700 <br />0 600 <br />117 <br />40-140 <br />Matrix Spike (9L27004 -MSI) <br />Source <br />W912427-35 <br />Benzene <br />0 894 <br />00050 <br />mg/kg <br />0 800 <br />ND <br />112 <br />50-150 <br />Toluene <br />0 908 <br />00050 <br />0 800 <br />ND <br />113 <br />50-150 <br />Ethylbenzene <br />0 914 <br />00050 <br />0 800 <br />ND <br />114 <br />50-150 <br />Xylenes (total) <br />264 <br />00050 <br />240 <br />ND <br />110 <br />50-150 <br />Surrogate a a a -Tri luorotoluene <br />0 608 <br />0 600 <br />101 40-140 <br />Matrix Spike Dup (9L27004 -MSD 1) <br />Source <br />W912427-35 <br />Benzene <br />0 990 <br />00050 mg/kg <br />0 800 <br />ND <br />124 50-150 <br />102 <br />20 <br />Toluene <br />101 <br />00050 <br />0 800 <br />ND <br />126 50-150 <br />106 <br />20 <br />Ethylbenzene <br />101 <br />00050 <br />0 800 <br />ND <br />126 50-150 <br />9 98 <br />20 <br />Xylenes (total) <br />2 86 <br />00050 <br />240 <br />ND <br />119 50-150 <br />8 00 <br />20 <br />Surrogate a ga-Trri luorotaluene 0 702 110 600 117 40.140 <br />Sequoia Analytical - Walnut Creek <br />Alan. B Kemp, LabomforV Director <br />The results in this report apply to the samples analyzed i n accorahnce with the chxn <br />custody document This analytical report must be reproduced in its enttr <br />Ir <br />i*+ <br />Page 3 of 4 <br />