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885 Jarvis Dnve <br /> Morgan Hill CA 95037 <br /> (i) Sequoia (408)776-9600 <br /> FAX 782-6308 <br /> AW Analytical <br /> www sequoequoialahs coni <br /> 0 <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133, Stockton,CA MPCO263 <br /> Project Number Arco#2133,Stockton,CA Reported <br /> 3017 Kilgore Rd Suite 100 0313]106 14 03 <br /> Rancho Cordova CA,95670 Project Manager Brian Carey <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 6CO9034- EPA 5030B PIT/EPA 8260B <br /> Blank(6C09034-BLK1) Prepared 03/09/06 Analyzed 03/10/06 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene <br /> ND 050 " <br /> tert Butyl alcohol ND 20 " <br /> Chlorabenzene ,- _-- _ — _ ND__ -_ _ 050 <br /> Di-isopropyl ether ND 050 " <br />�l 2-Dibro noethane(EDB) ND O 50 <br /> 12-Dichlorobenzene_ _ _ _ _ ND- - _ 050 mm _ <br />�l 3-Dichlorobenzene ND O 50 <br /> I 4-Dichlorobenzene ND 050 " <br /> 1,2-DichYoroethane <br /> ND 050 <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 050 - <br /> 1 of uene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-1212) ND 50 " <br /> Surrogate 1 2-Dichloroethane-d4 261 250 104 60-135 <br /> Surrogate 4-Bromofluoroben_ene 211 250 84 70-120 <br /> Surrogate Dibromofluoromethane 2 73 'I 250 109 65-130 <br /> Surrogate Toluene-d8 245 250 98 70-120 <br /> Laboratory Control Sample(6C09034-BS1) Prepared 03/09/06 Analyzed 03/10/06 <br /> Chlorobenzene <br /> 106 050 ugll 100 106 80-120 <br /> l 2-Dichlorobenzene 10 1 050 80 125 <br /> 10 0 101 <br /> 13-Dichlorobenzene 104 050 too 104 75-120 <br /> 1 4 Dichlorobenzene 987 050 too 99 75-120 <br /> Suri ogate 1 2-Dichloroethane-d4 243 250 97 60-135 <br /> Surrogate 4 Bromofluorobemene 152 250 101 70-120 <br /> Surrogate Dibromofluoromethane 265 150 106 65-130 <br /> Suit ogare Toluene-d8 <br /> 259 250 104 70-120 <br /> Sequoia Analytical - Morgan Hill The results in this report apply to the samples analyzed in accordance wtih the chain Of, <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 20 <br />