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t . 8Hi l CA 5037 <br /> Drive <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> �► <br />' www sequotalabs com <br />' ET1C 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 Morse 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 5J20016-EPA 5030B PIT <br />' Matrix Spike(5J20016-MSI) Source MOJ0417-11 Prepared 10/20/05 Analyzed 10/21/05 <br /> 1,1,2-Trichloroethane 115 050 100 ND 115 85-120 <br />' Tnchloroethene 177 050 „ 100 70 107 60-140 <br /> Trichlorofluoromethane 103 050 100 ND 103 85-130 <br /> 1,2,3-Tnchloropmpane 110 050 100 ND 110 65-125 <br />' 1,2,4-Tnmethylbenzene 106 050 1' 100 036 102 85-120 <br /> 0,5-Tnmethylbenzene 109 050 100 ND 109 75-130 <br /> Vinyl chloride 121 050 100 ND 121 55-145 <br />' Xylenes(total) 343 050 300 ND 114 85-125 <br /> Surrogate Dibromofluoromethane 559 500 112 65-130 <br /> (mate 12-Dichloroethane-d4 623 500 125 60-135 <br /> ate 12-Dichloroethane-d4 623 500 115 60-135 <br /> Surrogate Toluene d8 556 500 111 70-110 <br /> Surrogate 4-Bromofluorobenzene 520 500 104 70-120 <br />' Matrix Spike Dap(5J20016-MSD1) Source MOJ0417-11 Prepared 10/20/05 Analyzed 10/21/05 <br /> tert-Amyl methyl ether 106 050 ug/1 100 ND 106 80-115 2 15 <br /> Benzene 122 0 50 100 ND 122 65-115 2 20 QM01 <br />' Bromobenzene 112 050 " 100 ND 112 80-120 2 15 <br /> Bromochloromethane 115 050 100 ND 115 60-145 0 20 <br />' Bromodichloromethane 132 050 100 ND 132 75-150 3 15 <br /> Bromoform 108 0 50 100 ND 108 60-125 3 15 <br /> Bromomethane 128 10 100 ND 128 40-150 7 35 <br />' tert-Butyl alcohol 646 20 " 50 0 ND 129 75-120 14 25 QC01 <br /> sec-Butylbenzene 11 7 0 50 100 035 114 80-130 3 15 <br /> Cert-Butylbenzene 112 0 50 " 100 ND 112 80-125 3 15 <br />' n-Butylbenzene 112 050 10 0 ND 112 80-130 4 15 <br /> Carbon tetrachloride 122 050 100 ND 122 75-140 4 20 <br />' Chlorobenzene 131 0 50 ;i 10 0 074 124 80-120 2 10 QC01 <br /> Chloroethane 121 10 10 0 ND 121 75-120 9 30 QM01 <br /> Chloroform 132 0 50 " 100 ND 132 80-125 2 15 QM01 <br /> Chloromethane 124 050 100 ND 124 50-135 3 20 <br /> is 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 bases This <br /> analytical report must be reproduced in its entirety <br /> Page 73 of 80 <br />