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y ( ® Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364-9233 <br /> i��f��l 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988-9673 <br /> Analytical 819 Straker Avenue Sete 8 Sacramento, CA 95834 (916) 921 9600 FAX (9 16)921 0100 <br /> Gettler Ryan/Geostrategies Client Prol ID Chevron 9-6171, Stockton Sampled 02/12/96 <br /> 6747 Sierra Court Suite G Sample Descript MW-6 Received 02/13/96 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/16/96 <br /> " Attention Deanna Harding Lab Number 9602848-04 Reported 02121196 <br /> QC Batch Number GCO21696BTEX0IA <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas .. .. 100 330 <br /> Benzene 1 0 N D <br /> Toluene t 0 N D <br /> Ethyl Benzene 1 0 N D <br /> Xylenes (Total) 1 0 N D <br /> Chromatogram Pattern <br /> Discrete Peak ... C7-C8 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 104 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> Gregory <br /> ect Manager Page 4 <br />