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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> CO 404 N Wiget lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988%73 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Enviros - - --� Client Proj-ID Shell 6131 Pacific, Stockton----- --- Sampled 07/02/97 <br /> 270 Perkins Ave Sample Descript SS-4-56 5 Received 07/03/97 <br /> E Sonoma, CA 95476 Matrix SOLID Extracted 07/11/97 1` <br />_ MAnalysis Method 8015Mod/8020 Analyzed 07/12/97 c <br /> Attention Joe Neely----- _ Lab Number 97.0731_Oµ12 _- _____ - ReAorted_07 f 18197 _ <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 /> TPPH as Gas .... 5a .. .. .. .. .. . 440 <br /> Methyl t-Butyl Ether .. .. 12 .. .. ... .. 46 <br /> Benzene ... ... .. ..... . 025 -- - . ..... 6 4 <br /> Toluene - - -• -- •• - - 0.25 ..... .. 24 <br /> Ethyl Benzene - ... ... 025 .. .- --- -- -- 6 4 <br /> Xylenes (Total) .. ...... . .... 025 .. - - -- - - 38 <br /> Chromatogram Pattern ... .. .. . .. ... .- .-- C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Triflucrotoluene 70 130 112 <br /> 4-Bromofluorobenzene 60 140 100 <br /> I <br /> i <br /> i <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> i <br /> I <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 0 i <br /> Wr <br /> e e Gregory - <br /> Project Manager Page �12 <br />