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Sequoia <br />� Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-96M <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Gettler Rvan Inc -Dublin Projett Chevron <br />6747 Sierra Court Suite 1 Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 16 -May -00 15 24 <br />I _ - <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 OE15003 - EPA 5030B (PIT] <br />Blank (OE15003-BLK1) <br />209 <br />Prepared & Analyzed 15 -May -00 <br />Purgeable Hydrocarbons <br />ND <br />50 ug/i <br />Benzene <br />ND <br />0 50 " <br />Toluene <br />ND <br />0 50 <br />Ethylbenzene <br />ND <br />0 50 <br />Xylenes (total) <br />ND <br />0 50 <br />Surrogate a,aa•Tnfluorololuene <br />340 <br />300 113 70.130 <br />LCS (OE15003-BSI) <br />Prepared & Analyzed 15 -May -00 <br />Benzene <br />209 <br />0 50 ug/I <br />200 <br />104 <br />70-130 <br />Toluene <br />213 <br />0 50 <br />200 <br />106 <br />70-130 <br />Ethylbenzene <br />217 <br />0 50 <br />200 <br />109 <br />70-130 <br />Xylenes (total) <br />625 <br />0 50 <br />600 <br />104 <br />70-130 <br />rrogate aaa-Tnfluorotoluene <br />198 <br />300 <br />993 <br />70-130 <br />Matrix Spike (OE15003-MSI) <br />Source W005082-06 <br />Prepared & Analyzed <br />15 -May -00 <br />Benzene <br />201 <br />050 ug/i <br />200 <br />ND <br />101 <br />70-130 <br />Toluene <br />203 <br />050 <br />200 <br />ND <br />101 <br />70-130 <br />Ethylbenzene <br />206 <br />050 <br />200 <br />ND <br />t03 <br />70-130 <br />Xylenes (total) <br />596 <br />050 <br />600 <br />ND <br />993 <br />70-130 <br />Surrogate asa-Tnfluorotoluene <br />286 <br />300 <br />953 <br />70-130 <br />Matrix Spike Dup (OE15003-MSDI) <br />Source W005082-06 <br />Prepared & Analyzed <br />15 -May -00 <br />Benzene <br />209 <br />050 ug/1 <br />200 <br />ND <br />104 <br />70-130 <br />390 <br />20 <br />Toluene <br />213 <br />0 50 <br />200 <br />ND <br />106 <br />70-130 <br />481 <br />20 <br />Ethylbenzene <br />21 5 <br />0 50 <br />200 <br />ND <br />108 <br />70-130 <br />428 <br />20 <br />Xylenes (total) <br />620 <br />0 50 <br />600 <br />Nil <br />103 <br />70-130 <br />3 95 <br />20 <br />Surrogate a as -Tri luorololuene <br />289 <br />300 <br />963 <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 />Page 4 of 6 <br />::1K <br />