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Sequoia CA 404 N lane <br /> Walnut Creek CA 94598 <br /> (925)988 9600 <br /> Analytical FAX 9$8 9673 <br /> seqeclUoir]atn mom <br /> Se Rancho Cordova Project Arco <br /> 1017 Kilgore Rd,Ste #100 Project Number Arco#4932,Stockton Reported <br /> ancho Cordova CA,95670 Project Manager Rusty Benkosky 27-Jul-01 14 25 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> ' Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> alyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> atch 1G20011 - EPA 5030B(PIT) <br /> FH k(IG2001 l-BLK4) _ _ Prepared&Analyzed 26-Jul-01 <br /> anoI ND 500 ug/1 <br /> ert-Butyl alcohol ND 20 " <br /> (thy]tert-butyl ether ND 2 0 " <br /> isopropyl ether ND 2 0 " <br /> tyl tert-butyl ether ND 2 0 " <br /> ert-Amyl methyl ether ND 2 0 <br /> tDichloroethane ND 20 " <br /> ylene dibromide ND 20 " <br /> Surrogate Dibromofluoromethane 570 500 114 50-150 <br /> ogate 1 1-Dichloroethane-d4 550 500 110 50-150 <br /> t'S <br /> (IG20011-BSI) Prepared&Analyzed 20-Jul-01 <br /> ert-butyl ether 492 20 ug/l 500 984 70-134 <br /> Dibromofluoromethane 450 500 900 50-150 <br /> rogate 1 2-Drchloroethane-l4 480 " 300 960 50-150 <br /> {1G20011-BS2) Prepared&Analyzed 24-Jul-01 <br /> yl cert-butyl ether 501 20--ug11 -- Soo too 70-130 tsh <br /> Surrogate Dtbromofluoromethane 540 500 108 50-150 <br /> ogate 12-Dichloroethane-l4 510 500 104 50-150 <br /> (I G2001 I-BS3) Prepared&Analyzed 25-Jul-01 <br /> Methyl tcrt-butyl ether _ 53 8 20 ug/l 500 108 70-130 <br /> Wgwr <br /> Dtbromof%oromelhane _ 560 500 111 50-150 <br /> gate 12-Dichloroethane-d4 500 500 100 50-150 <br /> LCS(IG20011-BS4) Prepared&Analyzed 26-]u1-01 <br /> ttogate <br /> hyl i rt-butyl ether 459 20 ugA 500 918 70-130 <br /> Dibromofluoromethane 530 500 106 50-150 <br /> Surrogate 1 2-Dtchloroethane-d4 480 500 960 50-150 <br /> 1 <br /> quota Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with rhe chain of <br /> custody document This analytical report must be reproduced:n its entirety <br /> ' Page 12 of 15 <br />