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y Sequoia 680 Chesapeake Drive Redwood Gty,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> IT) 4114 lel Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> X17 Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Gentler-Ryan Geostrategies__. Client Proj ID __ Unocal S5# 5886_ - .r `Sampled 03/25%98 <br /> 6747 Sierra �ourt Surte J Sample Descript MW-5D Received 03/25/98 <br /> Dublin, CA 94568 Matrix UQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/03/98 <br /> Attention-Deanna Harding ---- -3 Lab Number- 9803G82-07z ���� __ __ r _ __ Reported 04108/98 _ <br /> :C"Batch Number GC040398802009A---=- µ - _-� -------_�_ - �— <br /> nstrument ID GCHP09 <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 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (total) 050 N D <br /> Chromatograrn Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 101 <br /> • <br /> analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN LYTICAL - ELAP 41271 <br /> r <br /> ) 4 ::� <br /> rolect Manager Pae 19 <br /> 9 <br />