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Sequoia 9680 Chesapeake Drive Redwood City,CA 940 (650) 3fi4 9600 FA,( <br /> 1 404 N Wiget t.ane Walnut Creek,CA 94598 (55D)364 9233 <br /> 819 Sinker Avenue Surte 8 Sacramento CA 95834 (516) 988 9600 FAX(510)988 9673 <br /> Analytical (916) 92t 9600 FAX(916)921 0100 <br /> Ground Zero Analysis, Inc - Client Pro-j--lD " 96-163/Knowles Rack -- ` -- - - - - " <br /> 1714 St Sample Descnpt KR Eff Sampled-11/04/97 <br /> Escalon, CA 95320 Matrix AIR Rece1ved 11/04/97 <br /> Analysis Method 8015Mod/8020 Analyzed 11/05/97 <br /> Attention Gre�Stahl _ Lab Number 9711038-02 <br /> _ ---x==w -= _ " -_ _" __ _ _ - - - - - Reported 11(06/97 <br /> QC <br /> Nat-6h-Number GC110597BTEX21 A -- ` - <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) With BTEX <br /> Analyte Detection Limit <br /> ug/L ug/L Sample Results <br /> TPPH as Gas <br /> Benzene 100 150 <br /> 6 Toluene 1 0 39 <br /> d Ethyl Benzene 1 0 84 <br /> Xylenes (Total) 1 0 is <br /> Chromatogram Pattern 1 0 <br /> 88 <br /> Gas � <br /> l Surrogates Control Limits %I Trrfluorotoluene 70 % Recovery <br /> 130 105 <br /> I I <br /> f <br /> i <br /> r <br /> 1 I <br /> I <br /> s <br /> F <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQU4 LYTICAL- ELAP 1210 <br /> l <br /> y Penner I <br /> Project Manager <br /> Page 2 <br />