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8Hi Jarvis Drive <br /> Segtaoi� Mor6an CA 037 <br /> (4040 8)776 9600 9600 <br /> �"1t <br /> �p n a Ntical FAX(408)782 6308 <br /> FL www sequoutlabs com <br /> URS Corporation[ArcoI I Project BP Heritage#11194,Tracy,CA MPA1469 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-001 I Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/13/06 15 39 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 6BO9004-EPA 5030B P/T 1 EPA 8260E <br /> Matrix Spike Dup(6809004-MSDI) Source MPA1470-02 Prepared&Analyzed 02/09/06 <br /> Toluene 199 25 ug/l 190 16 104 85-120 3 20 <br /> Xylenes(total) 202 2 5 204 5 8 96 85-125 2 20 <br /> Gasoline Range Organics(C4-C12) 2090 250 2200 250 84 60-140 0 5 25 <br /> Surrogate 12-Dichloroethane-d4 461 500 92 60-135 <br /> The results in this report apply to the samples analyzed in accordance with the thorn of <br /> Sequoia Analytical Morgan Hill P PPY P Y <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 10 <br />