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uo0 Chesapeake Drive Redwood City, CA 9463 (650) 364-9600 FAX (650) 364-9233 <br /> Sequoia 404 N. Wiget Lane Walnut Creek, CA 94598 (925) 988-9600 FAX (925) 988-9673 <br /> CE) 819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921 -9600 FAX (916) 921 -0100 <br /> 1455 McDowell Blvd. North, Ste. D Petaluma, CA 94954 (707) 792- 1865 FAX (707) 79Z-0342 <br /> Analytical <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650) Z32-9600 FAX (650) Z32-9612 <br /> ettler-Ryan - Dublin Client Project ID : Unocal SS#8671 , Stockton Sampled . May ay 14, 009.11 <br /> 6747 Sierra Court, Suite J Sample Matrix: Water Received : May 14, 1999:!1] <br /> Dublin, CA 94568 Analysis Method : EPA 5030/8015 Mod. /8020 Reported : Jun 4, 19991:: <br /> Attention: Deanna Harding First Sample # : 905- 1317 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample Sample Sample <br /> Analyte Limit 1- D - I - D. I.D. I . D. I . D, <br /> Ng/L 905-1317 905-1318 905-1319 905-1320 905-1321 <br /> TB-LB MW-1 MW-2 MW-3 MW-4 <br /> Purgeable <br /> Hydrocarbons 50 N . D. N . D. 58 N . D. N . D. <br /> Benzene 0 . 50 N . D . N . D. 1 . 6 N . D . N . D . <br /> Toluene 0 . 50 N . D . N . D. 0 . 69 N . D . N . D . <br /> Ethyl Benzene 0 . 50 N . D . N . D. N . D . N . D . N . D . <br /> Total Xylenes 0 .50 N . D . N . D. N . D . N . D . N . D . <br /> MTBE 2. 5 N . D . 22 N . D . N . D. N . D. <br /> Chromatogram Pattern : Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor: 1 . 0 1 .0 1 .0 1 .0 1 . 0 <br /> Date Analyzed : 5 /21 /99 5/21 /99 5/21 /99 5/21 /99 5 /21 /99 <br /> Instrument Identification: HP-5 HP-5 HP-5 HP-5 HP -5 <br /> Surrogate Recovery, %: 87 99 84 86 97 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard . <br /> Analytes reported as N. D. were not detected above the stated reporting limit. <br /> SEQUOIA ANALYTICAL, # 1271 <br /> J/dlfalnne Fegley l <br /> Project Manager <br /> 9051317.GET < 1 > <br /> m. <br />