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i <br /> I <br /> Sequoia 660 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(659)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> I <br /> Ground Zero Analysis, Inc Client Prod-ID 96-163/Knowles Rock Sampled 11/04/97 <br /> 1714 Main St Sample Descnpt KR Influ Received 11/04/97 <br /> Escalon, CA 95320 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 11/05/97 1 <br /> ;µAttention Greg Stahl Lab Number 9711038-01 Reported 11106197 <br /> QC Batch Number GC110597BTEX21As <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX { <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 5000 14000 <br /> Benzene 50 260 <br /> Toluene 50 360 <br /> Ethyl Benzene 50 50 <br /> Xylenes(Total) 50 220 <br /> romatogram Pattern Gas <br /> I <br /> Surrogates Control Limits% % Recovery <br /> TrMuorotoluene 70 130 103 <br /> 1 <br /> RECEI VEp <br /> NOV 12 1997 <br /> Ans d. ....._ <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEWa <br /> AL - ELAP #1210 <br /> r <br /> yolect page ti <br /> P I <br />