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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget lane Walaut Creek CA 94598 (510) 988 9600 FAX(510)988%73 <br /> Analytical 819 Straker Avenue,Suite a Sacramento,CA 95834 {916) 92T 9600 FAX(916)921-0too <br /> Blair e-fech Services - - - _- -Client Prod ID -Chevron-9-8264 970827-T1 - - - -'- - <br /> 2 1680 Rogers Avenue Sample Descrlpt MW-1 / Received <br /> d 08/27/97 =_ <br /> San Jose, CA 95112 Matrix LIQUID /28/97 <br /> Analysis Method 8015Mod/8020 Analyzed 09/02/97 <br /> Attention Fran Thie Lab Number 970SE76-01 Reported 09/091 97 <br /> -- - <br /> -- <br /> QC Batch Number GCO90297BTEX07A' <br /> Instrument ID GCHP07 - <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br /> TPPH as Gas 50 <br /> Methyl t-Butyl Ether 25 N DN D <br /> Benzene <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern 050 N D <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 80 <br /> knalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A AL IC - ELAP #1210 <br /> leggy Pe r <br />'ret Manager <br /> Page 10 <br />