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' Sequoia 885 Jarvis Drive037 <br /> Morgan Hill, 77 -9600 <br /> Analytical cquoi 776-9600 <br /> FAX(408)782 6308 <br /> Iwww 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 Limn Notes <br /> Batch 5J19027-EPA 5030B PIT <br /> Blank(5J19027-BLK1) Prepared&Analyzed 10/19/05 <br /> Tnchloroethene ND 025 " <br />' Tnehlorofluoromethane ND 025 <br /> 1,2,3-Tnchloropropane ND 027 <br /> 1,2,4-Tnmethylbenzene ND 025 " <br />' 1,3,5-Tnmethylbenzene ND 025 " <br /> Vinyl chlonde ND 025 <br /> Xylenes(total) ND 047 " <br />' Surrogate Dibromofluoromethane 232 250 93 65-130 <br /> Surrogate 12-Dichloroethane-d4 249 250 100 60-135 <br /> gate 12-Dichloroethane-d4 249 250 100 60-135 <br /> gate Toluene-d8 233 250 93 70-120 <br /> Surrogate 4-Bromofluorobenzene 247 250 99 70-120 <br /> LCS(5J19027-BS1) Prepared&Analyzed 10/19/05 <br /> ten-Amyl methyl ether 110 050 ug/I 100 110 80-115 <br /> Benzene 119 050 100 119 65-115 QC01 <br /> Bromobenzene 105 050 100 105 80-120 <br /> IBromochloromethane 123 050 100 123 60-145 <br /> Bromodichloromethane 138 050 100 138 75-150 <br /> Bromoform 11 1 050 100 111 60-125 <br /> Bromomethane 118 10 100 118 40-150 <br /> ter(-Butyl alcohol 55 1 20 500 110 75-150 <br /> sec Butylbenzene 109 050 „ 100 109 80-130 <br /> tert-Butylbenzene 11 1 0 50 100 111 80-125 <br /> n-Butylbenzene 110 0 50 100 110 80-130 <br /> ICarbon tetrachloride 12 0 050 100 120 75-140 <br /> Chlorobenzene 113 050 100 113 80-120 <br /> Chloroethane 100 10 i' 100 100 75-120 <br /> Chloroform 13 2 050 100 132 80 125 QC01 <br /> Chloromethane 107 050 " 100 107 50-135 <br /> 2-Chlorotoluene 116 050 100 116 80 120 <br /> �ola 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 52 of 80 <br />