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Gettler-Ryan/Geostrategies(1) Protect Tosco(1) <br /> 6747 Sura Court,Suite J = Project Number- Tosco(Unocal)SS#6981 Reported a <br /> Dublin CA,94568 Ptolect M—s- Deanna Hardurg 07/12/0106 51 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reportmg spfm SOW" Y.RW RPD <br /> IA"W Rauh Lmnt ti= Lavoi Rewh %&-W L TRIM RPD Lf wt Nota <br /> Batch 1070022-EPA 5030B_(PITj <br /> Blank(1070023-BLKI) Prepared&Analyzed 07/05/01 <br /> Surrogate 1 2-Dichloroethane-d4 445 ug/1 Soo 890 76-114 <br /> Surrogate Toluene-d8 500 500 100 88-110 <br /> Blank(1070022-BLK2) Prepared&Analyzed 07/09/01 <br /> Ethanol ND 1000 u8/1 <br /> 1,2-Dlbmmoethanc ND 20 " <br /> 1,2-ncchlomethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tett-butyl other ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Tart-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 420 Soo 840 76-114 <br /> Surrogate Toluene-d8 495 500 990 88-110 <br /> LCS(1070022-BS1) Prepared&Analyzed 07/05/01 <br /> Methyl tert-butyl ether 460 20 ug/l 500 920 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 452 Soo 904 76-114 <br /> Surrogate Toluene-d8 490 500 980 88-110 <br /> LCS(1070022-BS2) Prepared&Analyzed 07/09/01 <br /> Methyl tert-butyl ether 58 1 20 ug/1 Soo 116 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 423 " 500 846 76-114 <br /> Surrogate Toluene-d& 467 500 934 88-110 <br /> Matrix Spike(1070022-MS1) Source L106220-04 PLTared 07/05/01 Analyzed 07/06/01 <br /> Methyl tert-butyl ether 370 20 ug/I 500 ND 740 60-140 <br /> Surrogate 1,2-Dichloroethane-& 428 " 500 856 76-114 <br /> Surrogate Toluene-d8 482 Soo 964 88-110 <br /> Sequoia Analytical- Sail Carlos The results in this report apply to the samples analyzed in accordance with the djw <br /> custody document 7ha analytical report must be reproduced in its entirety <br /> Page 19 of 22 <br />