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Sequoia *40W680 Chesapeake Drive Redwood City,CA 94063 (650) 364.9600 FAX(650)364-9133 404 N.Wiget lane Walmt Creek,CA 94598 (510) 988-9600 FAX 510)988-9673 foll,� Analytical 819 Striker Avenue,Suite 8 Sacnmento,CA 95834 (916) 911-9600 FAX(916)911-0100 Pacific Environmental Group Client Project ID Unocal, Lathrop,CA Sampled: Nov 10, 1997:;': 11315 Sunrise Gold Circle, Ste. M Sample Matrix: Soil Received: Nov 10, 1997'. iI Rancho Cordova, CA 95742 Analysis Method: EPA 5030/8020, DHS Luft Reported: Dec 3, 1997<` Attention: Rusty Benkosky First Sample #: 711-0397 TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION Reporting Sample Sample Sample Sample Sample Sample Analyte Limit I.D. I.D. I.D. I.D. I.D. I.D. mg/kg 711-0397 711-0398 711-0399 711-0400 711-0401 711-0402 T-1-S914' T-1-N@13' T-2-S@13' T-2-N@14' T-3-W@73' T-3-E@73' Purgeable Hydrocarbons 1.0 810 1,800 800 130 200 5,800 Benzene 0.0050 0.52 N.D. N.D. N.D. N.D. 3.6 Toluene 0.0050 8.4 9.3 6.8 0.10 14 160 Ethyl Benzene 0.0050 13 9.2 16 1.9 24 110 Total Xylenes 0.0050 70 75 87 12 210 560 Chromatogram Pattern: Gasoline Weathered Weathered Weathered Weathered Gasoline C6-C12 Gasoline Gasoline Gasoline Gasoline C6-C12 C6-C12 C6-C12 C6-C72 C6-C72 Quality Control Data Reporting Limit Multiplication Factor: 100 500 50 1.0 500 250 Date Analyzed: 11/18/97 11/18/97 11/19/97 11/19/97 11/18/97 11/18/97 Instrument Identification: GCHP-2 GCHP-2 GCHP-1 GCHP-1 GCHP-2 GCHP-2 Surrogate Recovery, %: 87 86 85 100 80 86 (QC Limits = 60-140%) Purgeable Hydrocarbons are quantitated against a fresh gasoline standard. �ACIfIC E8V/R0' (f V, Analytes reported as N.D.were not detected at or above the reporting limit. [N!A(ppppp IdC SEQ IA ANALYTI AL, ELAP #7624 �C 8 RFC'0 nda C. Schneider rolect Manager'Sacramento Laboratory 7110397 PIES <t .