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Se680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364 9233 <br /> Ll Ola <br /> rY-' q 404 N W get cane Walnut Creek CA 94598 (925)988 9,500 FAX(92 5)988 9673 <br /> 'JW,,,� Analytlea 819 5rr ker Avenue Suite 8 Sacramento CA 95$34 (916)92E 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 79Z-034Z <br /> EA Engineering Science &Tech Client Prot ID Exxon 7-3942, 5153942 1300 Sampled 08/19/98 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descrlpt RW4 Received 08/20/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/01/98 <br /> Attention Chnsta Marting Lab Number 9608C97-16 Reported 09J04198 <br /> tC Batch Number GCO90198BTEX21A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 500 3100 <br /> Methyl t-Butyl Ether 25 <br /> Benzene 50 D <br /> 1 990 <br /> Toluene so 240 <br />,Ethyl Benzene 50 210 <br /> Xylenes (Total) 5 0 580 <br /> Chromatogram Pattern GAS <br /> Furrogates Control Limits % % Recover <br /> rifluorotoluene 70 130 100 <br /> t <br /> alytes reported as N D were not present above the stated limit of detection <br /> IQUOIA ANALYTICAL - ELAP #1210 <br /> �r <br /> f�Herling t <br /> anager Page 14 <br /> t <br /> r <br />