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885 Jarvis Drive <br /> Sequoia Morgan Hill, <br /> (4088)776 9600 7769600 <br /> FAX <br /> Analytical wwseq(408)782-6308308 <br />' www sequoialabs corn <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 Motse 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 Lima Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5J19027-EPA 5030B P/T <br />' LCS(5J19027-BS1) Prepared&Analyzed 10/19/05 <br /> p-Isopropyltoluene 107 050 100 107 80-140 <br />' n Propylbenzene 113 050 100 113 75-135 <br /> Styrene 107 050 100 107 85-130 <br /> 1,1,1,2-Tetrachloroethane 109 050 100 109 85-120 <br />' 1,1,2,2-Tetrachloroethane 115 050 " 100 115 70-140 <br /> Tetrachloroethene 114 050 100 114 85-125 <br /> Toluene 119 050 100 119 85-120 <br />' 1,2,3-Tnchlorobenzene 102 050 100 102 70-135 <br /> 1,2,4-Tnchlorobenzene 101 0 50 100 101 70-130 <br />' 0Tnehloroethane 124 0 50 too 124 85-135 <br /> Trichloroethane 11 8 050 100 118 85 120 <br /> Trichloroethene 108 050 100 108 60-140 <br />' Tnchlorofluoromethane 125 050 100 125 85-130 <br /> 1,2,3-Tnchloropropane 114 050 100 114 65-125 <br /> 1,2,4-Tnmethylbenzene 110 050 100 110 85-120 <br />' 1,3,5-Tnmethylbenzene 109 050 100 109 75-130 <br /> Vinyl chloride 968 050 100 97 55-145 <br />' Xylenes(total) 349 050 ,I 300 116 85-125 <br /> Surrogate Dibromofluoromethane 240 250 96 65-130 <br /> Surrogate I 1-Dichloroethane-d4 249 250 100 60-135 <br />' Surrogate I 1-Dichloroethane-d4 249 ,I 250 100 60-135 <br /> Surrogate Toluene-d8 242 250 97 70-120 <br /> Surrogate 4-Bromofluorobenzene 153 250 101 70-120 <br /> Matrix Spike(5J19027-MSI) Source MOJ0953-05 Prepared&Analyzed 10/19/05 <br />' tert-Amyl methyl ether 577 25 ug/1 500 ND 115 80-115 <br /> Benzene 1180 25 500 560 124 65-115 QC01 <br />' Bromobenzene 532 25 500 ND 106 80-120 <br /> Bromochloromethane 624 25 " 500 ND 125 60-145 <br /> Bromodichloromethane 711 25 500 ND 142 75-150 <br />' Bromoform 567 25 500 ND 113 60-125 <br /> *oia Analytical-Morgan Hill The results to 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 54 of 80 <br />