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�1 Sequoia <br />L4 Analytical <br />404 N Wiger Lane <br />Walnut Creek CA 94598 <br />(925)988-9600 <br />FAX (925) 988 9673 <br />www sequolalabs corn <br />w <br />an Inc -Dublin <br />Project Chevron <br />76747SierraCourt Sulte J <br />ProlectNumber Chevron SSiX9-5775 <br />Reported <br />94568 <br />Project Manager Scott Polston <br />11 -May -0O 07 30 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX In Air by DHS LUFT - Quality <br />Control <br />Sequoia <br />Analytical - Walnut Creek <br />Reporting Spike Source %REC <br />RPD <br />IAnsl�te <br />Result <br />Limit Units Level Result %REC Limits RPD <br />Limit Notea <br />B.itch OE03007 - EPA 5030B [PIT] <br />Blank (OE()3007-BLKI) <br />Prepared K Anal}zed 28 -Apr -00 <br />Purq.able 11l <br />ND <br />2 0 rng'm" Air <br />3,raLne <br />ND <br />0 010 <br />i oluene <br />ND <br />0 010 <br />Fthflhenzene <br />ND <br />0 010 <br />\%lenes ttotal) <br />ND <br />0 010 <br />Sut7ogate a a a-Trrfiuorotoluetre <br />534 <br />600 923 70-130 <br />LCS (OE03007-13SI) <br />Prepared 28 -Apr -00 Analyzed 01 -May -00 <br />Benzene <br />176 <br />0 010 rrig!rn` Air 200 890 70-130 <br />Toluene <br />1 90 <br />0 010 200 950 70 130 <br />E.thflbenzene <br />214 <br />0 010 200 107 70-130 <br />\'lenes (total) <br />614 <br />0 010 600 102 70-130 <br />arrogate a a a-Triuoroiol uene <br />518 <br />600 863 70-130 <br />LCS Dup (OE03007-BSDI) <br />Prepared 28 -Apr -00 Analyzed 01 -May -00 <br />Benzene <br />177 <br />0 010 mg/rn` Air 200 885 70-130 0 567 <br />20 <br />Toluene <br />191 <br />0 010 200 955 70-130 0 525 <br />20 <br />Ethylbenzene <br />2 14 <br />0 010 200 107 70-130 0 <br />20 <br />xylenes (total) <br />626 <br />0 010 600 104 70-130 194 <br />20 <br />Surrogate a aa•Trt luorotoluene <br />516 <br />600 860 70-130 <br />equoia AnalytiCal - Walnut Creek The results in this report apply to the samples anahzed m accordance with the chair of <br />custody document Thus analytical report roust be rep; oduced to its entirety <br />Page 6 of 7 <br />