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1551 Industrial Road <br /> 4 (650) 23Z-9600 <br /> ID Sequoia San Carlos CA 94070-4111 <br /> IAnalytical FAX(650) 232-9612 <br /> Sequoia-Morgan Hill Project Blaine/EQUIVA Sampled 8/27/99 <br /> 885 Jarvis Drive Project Number M909788/341 East Main St,Ripon Received 9/25/99 <br /> Morgan Hill,CA 95037 Project Manager Ka an Kim ai R orted 9/27/99 <br /> MTBE by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9090119 Date Prepared 9/24/99 Extraction Method EPA 5030B PIT <br /> Blank 9090119-BLKI <br /> Methyl tert-butyl ether 9/24/99 ND ug/l 200 <br /> Surrogate 1,2-Dichloroethane-d4 to 500 509 760-114 102 <br /> Blank 9090119-BLK2 <br /> Methyl tert-butyl ether 9/27/99 ND ug/l 200 <br /> Surrogate 1,2-Dichloroethane-d4 of 500 505 760-114 101 <br /> LCS 9090119-BS 1 <br /> Methyl tert-butyl ether 9/24/99 500 486 ug/l 700-130 972 <br /> Surrogate 1,2-Dichloroethane-d4 500 548 760-114 110 <br /> LCS 9090119-BS2 <br /> ethyl tert-butyl ether 9/27/99 Soo _ 490 ug/l 700-130 980 <br /> gate 1,2-Diehloroethane-d4 Ff 500 518 If 760-114 104 <br /> Matrix Spike 9090119-MSI L909211-02 <br /> Methyl tent-butyl ether 9/24/99 500 ND 465 ug/l 600-140 930 <br /> Surrogate 1,2-Drchloroethune-d4 " 500 486 of760-11,1 97 2 <br /> Matrix S ike Dup 9090119-MSD/ L909211-02 <br /> Methyl tert-butyl ether 9124/99 Soo ND 466 ug/I 600-140 932 250 0 215 <br /> Surrogate 1,2-Dichloroethane-d4 to 500 480 It760-114 960 <br /> equoia Analytical-San Carlos <br /> *Refer to end of report for text of notes and definitions <br /> Page 4 of 5 <br />