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Sequoia 1455 McDowell Blvd North,Ste D <br /> Petaluma,CA 94954 <br /> Y (707)792-1865 <br /> Vi—wor Analytical FAX(707)792-0342 <br /> www sequotalabs com <br /> PGcttler-Ryan-Dublin PM-t Tosco <br /> 6747 Sierra Ct,Suite! Project Number 2701 West Match Lane,Stockton, CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding <br /> 62/27/01 10 24 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source /*REC RPD <br /> Analyte Result Limit Units Level Result /eREC Limits <br /> o RPD Limit Notes <br /> Batch 1020079-EPA 5030 waters <br /> LCS{1020079-BS4) Prepared&Analyzed 02/06/01 <br /> Methyl tert-butyl ether 545 0 500 UPI Soo 109 79-118 <br /> Surrogate Dibromofluoromethane 519 500 106 88-118 <br /> Surrogate 12-Dichloroethane-d4 524 500 105 81-130 <br /> Surrogate Toluene-d8 514 500 103 84-115 <br /> Matrix Spike(1820079-MS1) Source P102018-02 Prepared&Analyzed 02/04/01 <br /> 2310 <br /> Methyl tent-butyl ether 0 500 ug/l 5000 16900 124 79-11 B QM-07 <br /> Surrogate Dibromofluoromethane S34 5 00 107 88-118 <br /> Surrogate 1 2-Dichloroethane-d4 572 Soo 114 81-130 <br /> Surrogate Toluene-d8 505 .500 101 84-115 <br /> Matnx Spike Dup(1020079-MSDI) Source P102018-02 Prepared&Analyzed 02/04/01 <br /> kfiy1 tert-butyl ether 23200 500 ug/1 5000 16900 126 79-118 0 432 20 QM-07 <br /> RIMPgate Dibromofluoromethane 530 Soo 106 88-118 <br /> Surrogate I 1-Dichloroethane-d4 557 Soo 111 81-130 <br /> Surrogate Toluene-d8 500 500 100 84-115 <br /> Sequoia Analytical-Petaluma 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 12 of 14 <br />