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404 N 1Niget lane <br /> Sequoia Walnut Greek, -9600 <br /> 94598 <br /> (925)98 988-9G00 <br /> Analytical FAX(925)988-9673 <br /> er Ryan,Inc -Dublin protect Unocal <br /> Project Number- Unocal##5886 Reported <br /> 6747 Siena Court Suite J 17_Mar_00 09 54 <br /> Dublin CA,94568 project Manager' Deanna L Harding <br /> Volatile Organic Compounds by EPA Method 8260A- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Source %REC RPD <br /> Anal Result Lutnt Unats Level Result %REC Lands RPD Limit Notes <br /> Batch 0010011 -EPA 5030B[P!T] <br /> Blank(0010011-BLKI) prepared&Analyzed 10.Mar-00 <br /> ND 500 ugA <br /> Ethaaol <br /> tent-Butyl alcohol ND 100 " <br /> Methyl tert-butyl ether ND 20 " <br /> Dmsopropyl ether ND 20 " <br /> Ethyl tat-butyl ether ND 20 <br /> tort-Amyl methyl ether ND 20 <br /> " 50 0 104 SO-150 <br /> Surrogate Dibromoflz2.0 uoromethane " 111 SO•ISR <br /> Surrogate I 1 Dichloroethane-d4 56.0 500 <br /> LCS(0C10011-BS1) Prepared&Analyzed 10-Mar-00 <br /> Methyl tort-butyl ether 539 20 ugll 500 108 70-130 <br /> 53 0 SOD 106 50-150 <br /> Surrogate ,Aibr�amofhioromethane " IIO SO-150 <br /> Ogate e1,2Dlchloroethane-d4 550 500 <br /> tnx Spike(OC 10011-?AS 1) Source W00305345 prepared 10-Mar-00 Analyzed 13-Mar-00 <br /> Methyl tert--butyl ether 453 20 U94 500 ND 906 60-150 <br /> 480 SO 0 96 0 50.150 <br /> Surrogate Dibromofluoromedhai�ie 100 50-ISD <br /> Surrogate l,2-Dichloroethane-d4 5a4 500 <br /> Matrix Spike Dup(OC10011-MSDI) Source W003053-05 Prepared 10-Mar-OOAnalyzed 11-Mar-00 <br /> Methyl tett-butyl ether 440 20 ug/l 500 ND B&O 60-150 291 25 <br /> 50 0 98 0 50-150 <br /> Surrogate Dibromofhdorometlimre 490 100 50-!50 <br /> Surrogate 1,1 Dichloroethane-d4 500 " SO D <br /> 011-Walnut Creep 77,rults resin flus report apply to the sainples analysed in accordance with die chain of <br /> Sequoia <br /> Analytl c,,tdj,d cu wnt Tits anabecal report must be reproduced in its entirely <br /> f <br /> Page 26 of 27 <br />