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a— ) <br /> Sequoia <br /> � Jarvis CA 95 03 7Dave <br /> �7 ei q u O 1 a Morgan HillCA <br /> 776 9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoralabs cam <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MOJ0547 <br /> 3017 Kilgore Rd Suite 100 Project Number GOC 8D-0001 Reported <br /> Rancho Cordova CA,95670 Project Manager Clinton Harms 10/20/05 12 56 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %PEC RPD <br /> Analyte Result Limit UFLUS Level Result %REC Limits RPD Limit Notes <br /> Batch 5Ji7010-EPA 5030B P/T/EPA 8260B <br /> Matrix Spike(5,117010-MS1) Source MOJ0547-04 Prepared&Analyzed 10/17/05 <br /> ter(-Amyl methyl ether 436 12 ugA 376 ND 116 80-115 LM <br /> Benzene 644 12 129 500 112 65-115 <br /> tert-Butyl alcohol 4000 120 3580 ND 112 75-120 <br /> DI-Isopropyl ether 429 12 378 ND 113 75-125 <br /> 1,2-Dibromoethane(EDB) 479 12 372 ND 129 85-120 HL <br /> 1,2-Dichloroethanc 454 12 368 8 2 121 85 130 <br /> Ethanol 4680 2500 3540 190 127 70-135 <br /> Ethyl tert-butyl ether 446 12 376 ND 119 75-130 <br /> Ethylbenzene 522 12 188 300 118 75-135 <br /> Methyl tett-butyl ether 276 12 176 70 117 65-125 <br /> Toluene 2840 12 930 2000 90 85-120 <br /> Xylenes.(total) 2600 12 1030 1700 87 85-125 <br /> Gasoline Range Organics(C4-C 12) 23800 1200 11000 11000 116 60-140 <br /> Surrogate 12-Drchloroethane-l4 611 500 122 60-135 <br /> Matrix Spike Dup(5J17010-MSDI) Source MOJ0547-04 Prepared&Analyzed 10/17/05 <br /> tert-Amyl methyl ether 430 12 ugA 376 ND 114 80-115 1 15 <br /> Benzene 598 12 129 500 76 65-115 7 20 <br /> tett-Butyl alcohol 3780 120 3580 ND 106 75-120 6 25 <br /> DI-isopropyl ether 416 12 378 ND 110 75-125 3 15 <br /> 1,2-Dlbromoethane(EDB) 464 12 372 ND 125 85-120 3 15 HL <br /> 1,2-Dichloroethane 428 12 368 8 2 114 85-130 6 20 <br /> Ethanol 3660 2500 3540 190 98 70-135 24 35 <br /> Ethyl tert-butyl ether 434 12 376 ND 115 75-130 3 25 <br /> Ethylbenzene 515 12 188 300 114 75-135 ( 15 <br /> Methyl tert-butyl ether 263 12 176 70 110 65-125 5 20 <br /> Toluene 2710 12 930 2000 76 85-120 5 20 LN <br /> Xylenes(total) 2600 12 1030 1700 87 85-125 0 20 <br /> Gasoline Range Organics(C4-C 12) 22700 1200 11000 11000 106 60-140 5 25 <br /> Surrogate 1,2-Drehloroethane-d4 521 Soo 104 60-135 <br /> Sequoia Analytical-Morgan Hill The resents 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 wee weight basis <br /> . This analytical report must be reproduced in its entrmy <br /> Page 23 of 24 <br /> I <br />