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Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> X117 Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Envlros Client Prol 1D -Shell-6131 Pacific, Stockton Sampled 07/02/97 <br /> 270 Perkins Ave Sample Descript SB-4-46 5 Received 07/03/97 <br /> 1.2 Sonoma, CA 95476 Matrix SOLID Extracted 07/11/97 <br /> Analysis Method 8015Mod/8020 Analyzed 07/12/97 <br /> Attention Jae Neely _- Lab Number 970731011 Reported_07j18j97 ' <br /> -„-T -- -- -- - -- _ _ - __ _ - , _ <br /> QC Batch Number GC071197BTEXEXA- <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas . ..... .... .. 1.0 ...... .. 24 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene .. 00050 .. .. 0 21 <br /> Toluene 00050 N D <br /> Ethyl Benzene - - -. ..... 00050 .. ... . .. ... 0.11 <br /> Xylenes (Total) .... 00050 .... 0.058 <br /> Chromatogram Pattern: .. .. - . .... .. C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 83 <br /> 4-Bromofluorobenzene 60 140 116 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> r <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> f� <br /> regory <br /> t Manager Page 11 <br />