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14 T) <br />Sequoia <br />q„' Analytical <br />404 N WlgetLane <br />Walnut Creek CA 94598 <br />(925) 968-9600 <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Gettler Ryan Inc -Dublin Project Chevron <br />6747 Sierra Court Suite 3 Project Number Chevron SS49-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 25 -Apr -00 17 37 <br />Total Purgeable Hydrocarbons (C6-Ci2) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit ))nits Level Result %REC Limits RPD Limit Notes <br />Batch OD21002 - EPA 5030B [PIT] <br />Blank (OD21002-BLKI) Prepared & Analyzed 21 -Apr -00 <br />Purgeable Hydrocarbons <br />ND <br />50 ug/i <br />300 <br />93 7 <br />Benzene <br />ND <br />050 " <br />ND <br />945 <br />70-130 <br />Toluene <br />ND <br />0 50 <br />198 <br />Matrix Spike (OD21002-MSI) <br />Source W004227-03RE I Prepared& Analyzed 21 -Apr <br />Ethylbenzene <br />ND <br />0 50 <br />181 <br />050 ug/I <br />200 <br />Xylenes (total) <br />ND <br />050 " <br />ND <br />Toluene <br />193 <br />Surrogate aaa-Tri luorotoluene <br />18 7 <br />ND <br />300 <br />95 7 <br />70-130 <br />LCS (OD21002-BSI) <br />198 <br />050 <br />Prepared & Analyzed 21 -Apr -00 <br />Benzene <br />171 <br />050 ug/l <br />200 <br />855 <br />70-130 <br />Toluene <br />17 9 <br />0 50 <br />200 <br />895 <br />70-130 <br />Ethylbenzene <br />186 <br />0 50 <br />200 <br />930 <br />70-130 <br />Xvlenes (total) <br />561 <br />0 50 <br />600 <br />93 5 <br />70-130 <br />Surrogate aaa-Tnfluorolaluene <br />281 <br />" <br />300 <br />93 7 <br />'0-130 <br />050 ug11 <br />200 <br />ND <br />945 <br />70-130 <br />432 <br />20 <br />Toluene <br />198 <br />Matrix Spike (OD21002-MSI) <br />Source W004227-03RE I Prepared& Analyzed 21 -Apr <br />-00 <br />990 <br />Benzene <br />181 <br />050 ug/I <br />200 <br />ND <br />905 <br />70-130 <br />ND <br />Toluene <br />193 <br />050 <br />200 <br />ND <br />965 <br />70-130 <br />600 <br />Ethylbenzene <br />198 <br />050 <br />200 <br />ND <br />990 <br />70-130 <br />Xylenes (total) <br />59 2 <br />050 <br />600 <br />ND <br />987 <br />70-130 <br />Surrogate a ao-Tri luorotoluene <br />289 <br />300 <br />963 <br />70-130 <br />Matrix Spike Dup (OD21002-MSD1) <br />Source W004227-03RE1 Prepared& Analyzed 21 -Apr -00 <br />Benzene <br />189 <br />050 ug11 <br />200 <br />ND <br />945 <br />70-130 <br />432 <br />20 <br />Toluene <br />198 <br />050 <br />200 <br />ND <br />990 <br />70-130 <br />256 <br />20 <br />Ethylbenzene <br />197 <br />050 <br />200 <br />ND <br />985 <br />70-130 <br />0 506 <br />20 <br />Xylenes (total) <br />587 <br />050 <br />600 <br />ND <br />979 <br />70-130 <br />0 848 <br />20 <br />Surrogate aaa-Tnfluorotoluene <br />306 <br />300 <br />102 <br />70.130 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />• <br />Page 6 of 10 <br />MMI, <br />