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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> �& (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs com <br />' ETIC Engineering Inc-Pleasant Hill(Exxon) Project Exxon 7-3942 MOJ0913 <br /> 2285 Morello Avenue Project Number Exxon 7-3942 Reported <br /> Pleasant Hill CA,94523 Project Manager Ted Moise 11/09/05 15 08 <br />' Volatile Organic Compounds by EPA Method 8260B Quality Control <br /> Sequoia Analytical- Morgan Hill <br />' Evaluation Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />' Batch 5J19027-EPA 5030B PIT <br /> Matrix Spike(5J19027-MSI) Source MOJ0953-05 Prepared&Analyzed 10/19/05 <br /> Surrogate Dibromofluoromethane 244 256 98 65-130 <br /> Surrogate 1 2-Dichloroerhane-d4 256 250 102 60-135 <br /> Surrogate 12-Dichloroethane-d4 256 250 102 60-135 <br /> Surrogate Toluene-d8 244 250 98 70-120 <br />' Surrogate 256 70-120 <br /> Spike Dup(M19027-MSD1) Source-MOJ0953-05 Prepared&Analyzed 10119105 <br /> Matrix <br /> tert-Amyl methyl ether 560 25 ug/l 500 ND 112 80-115 3 15 <br /> Benzene 1140 25 500 560 116 65-115 3 20 QC01 <br />' Bromobenzene 520 25 500 ND 104 80-120 2 15 <br /> Bromochloromethane 596 25 500 ND 119 60-145 5 20 <br /> 9moodichloromethane 669 25 500 ND 134 75-150 6 15 <br /> form 552 25 500 ND 110 60-125 3 15 <br /> Bromomethane 574 50 500 ND 115 40-150 12 35 <br />' tert-Butyl alcohol 2810 1000 2500 ND 112 75-120 1 25 <br /> sec-Butylbenzene 522 25 500 ND 104 80-130 4 15 <br />' tert-Butylbenzene 532 25 500 ND 106 80-125 4 15 <br /> n-Butylbenzene 544 25 500 20 105 80-130 5 15 <br /> Carbon tetrachloride 562 25 500 ND 112 75-140 5 20 <br />' Chlorobenzene 541 25 500 ND 108 80-120 4 10 <br /> Chloroethane 478 50 500 ND 96 75-120 8 30 <br /> Chloroform 628 25 500 ND 126 80-125 6 15 QC01 <br />' Chloromethane 462 25 500 ND 92 50-135 11 20 <br /> 2-Chlorotoluene 581 25 500 22 112 80-120 2 15 <br /> 4-Chlorotoluene 600 25 500 9 0 118 75-125 5 10 <br /> Di-isopropyl ether 560 25 500 ND 112 75-125 5 15 <br /> 1,2-Dibromo-3-chloropropane 628 50 " 500 ND 126 65-140 4 20 <br /> Dibromochloromethane 540 25 „ 500 ND 108 70-125 1 15 <br /> 1,2-Dibromoethane(EDB) 581 25 500 ND 116 85-120 2 15 <br /> 1,2-Dibromoethane(EDB) 581 25 500 ND 116 85-120 2 15 <br /> Dibromomethane 632 25 500 ND 126 70-145 4 15 <br /> �oia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis This <br /> analytical report must be reproduced in its entirety <br /> Page 57 of 80 <br />