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I <br /> 1455 McDowell Blvd,NoM Ste 0 <br /> Sequoia Petaluma,CA 94954 <br /> Analytical- - - <br /> (707)192-1965 <br /> Analytical- - - --- - - - — - -- - - --- - --- - - - ---- --- -FAX(707)192-0342 -- -- -- <br /> www sequoiata6c cam <br /> 1 <br /> ' Secor-Rancho Cordova Project 1 Arco Site 4972,Stockton,CA P503205 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager-Rusty Benkosky 43130/05 12 44 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Rvonwi; Spike Source %MC RPD <br /> MalYte Result Limit Units Level Result %REC Limits RPD Limit Now <br /> Batch 5030223-EPA 5030B waters/EPA 8260E <br /> Blank(5030223-BLKI) Prepared&Analyzed 03/22/05 <br /> Benzene ND 050 ugll <br /> Dhylbenzene ND 050 <br /> Methyl cert butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xytenes(t0141) ND 050 ' <br /> Surrogate Dibromofluaromethane 44.2 Soo 88 84-122 <br /> ' Surrogate 1 2-Dichloroethane-d4 460 500 92 74-135 <br /> Surrogate Toluene-d8 428 so* 86 84-119 <br /> Laboratory Control Sample(5030223-BSI) Prepared&Analyzed 0322/05 <br /> Baume 470 050 ugA 500 94 a]-Jig <br /> Ethylbenzene 512 050 Soo 102 89-122 <br /> Methyl tort-butyl ether 477 050 500 95 77-123 <br /> Toluene 5 14 050 500 103 84 119 <br /> Xyle=(total) 153 050 150 102 86-132 <br /> ' Surrogate Dibromo luoromethane 485 300 97 84-122 <br /> Surrogate 12 Drchloroethane-d4 500 SOD 100 74-135 <br /> Surrogate toluene-d8 483 5 00 97 84-119 <br /> ' Matrix Spike(503027.3-MSI) ^Source.P503177-03 Prepared&Analyzed 03/22/05 <br /> Benzene 485 050 ug/1 500 ND 97 81-118 <br /> Ethylbenzene 514 050 500 Ola 100 89-122 <br /> ' Methyl tett-butyl ether 495 050 Soo 031 93 77-123 <br /> Toluene 512 050 500 ND 102 84-119 <br /> Xylenes(local) 154 050 I S O 031 101 86-132 <br /> ' Surrogate Dibromofluoromethane 499 N 500 100 84-122 <br /> Surrogate 12-Dichloroethane-d4 502 Soo 100 74-135 <br /> Surrogate Toluene-d8 487 500 97 84-119 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance wilh the chain of <br /> custody doeummnr Unless otherwise crated,results are reported on a wet weight basic <br /> Thrs analytical repart muse be reproduced in its entirety <br /> Page 16 of 20 <br />