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Sequoia 404 Chesapeake Drive Redwood Gk A 4598 (510) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510)986-9600 FAX(510)98$-9673 <br /> �III� <br /> Analytical 819 Straker Avenue Suite$ Sacramento CA 95834 (916)92E 9600 FAX(9l6)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792-034Z <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 5421, 140162 02 Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descript UWS-11(comp) Received 04/17/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/22/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/22/98 <br /> „ Attention Clyde Galantine Lab Number 9804C43-03 Reported 04/30/98 <br /> OC Batch Number GC0422986TEXEXB <br /> Instrument ID GCHP07 <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 N D <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 00077 <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 021 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 105 <br /> 4-Bromofluorobenzene 60 140 103 <br />• <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - FLAP #1210 <br /> ANVA'Wory <br /> ject Manager Page 9 <br />