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1551 Industrial d <br /> Sequoia San Carlos, CA 94070-41111 <br /> (650) 232-9600 <br /> Analytical FAX(650) 232-9612 <br /> 11680 <br /> me Tech Services Project Chevron(3) Sampled 8/26199 <br /> Rogers Avenue Project Number Chevron 9-6I71/990826-KI Received 8/27/99 <br /> Jose,CA 95112 Project Manager Chnstme Lillie REported 9/10/99 <br /> Volatile Organic Oxygenated Connpounds by EPA Method 8260A/Quality Control <br /> w Sequoa 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 9080165 Date Prepared 8130199 Extraction Method EPA 5030E [PIT) <br /> Blank 9080165-BLK1 <br /> Ethanol 8/30/99 ND ug/l 1000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1,2-Dichloroethane-d4 500 524 76 0-114 105 <br /> Blank 9080165-BLK2 <br /> Ethanol 8/31/99 ND ug/l 1000 <br /> Tert-butyl alcohol 11ND 200 <br /> Methyl tert-butyl ether ItND 200 <br /> Di-isopropyl ether IT ND It <br /> 200 <br /> hyl tert-butyl ether ND " 200 <br /> -amyl methyl ether ND 200 <br /> arrogate 1,2-Dtchloroethane-d4 500 489 760-114 978 <br /> LCS 9080165-BS 1 <br /> Methyl tert-butyl ether 8/30199 500 550 ug/l 700-130 110 <br /> Surrogate 12-Dtchloroethane-d4 IF 500 541 If 760-114 108 <br /> LCS 9080165-BS2 <br /> Methyl tert-butyl ether 8/31/99 500 449 ugll 700-130 898 <br /> Surrogate 1,2-Dichloroethane-d4 11500 480 760-114 960 <br /> Matnx_S»ike 9080165-MSI L908211-39 <br /> Methyl tert-butyl ether 8/30199 Soo ND 480 ug/1 600-140 960 <br /> Surrogate 1,2-Dtchloroethane-d4 11500 491 760-114 982 <br /> Matrix Spike Dup 9080165-MSDI L908211-39 <br /> Methyl tert-butyl ether 8130/99 500 ND 468 ug/1 600-140 93 6 25 0 253 <br /> Surrogate 1,2-Dtchloroethane-d4 500 504 76 0-114 101 <br /> uoia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 12 of 13 <br />