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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX-(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Analytical <br /> MPDS Seniices Client Project ID: Tosco#5421,7303 Pacific Ave., Stockton "Sampled. Dec 10, 1997. <br /> 2401 Stanwell Dr., Ste. 300 Sample Matrix: Water Received: Dec 10, 1997'." <br /> Concord, CA 94520 Analysis Method: EPA 3510/8015 Mod. Reported: Dec 31, 199T.I <br /> Attention: Jarrel Crider First Sample#: 712-1025 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <br /> Reporting Sample <br /> Analyte Limit I.D. <br /> pg/L 712-1025 1 <br /> MW-1 <br /> i <br /> Extractable <br /> Hydrocarbons 50 280 <br /> Chromatogram Pattern: Unidentified <br /> Hydrocarbons <br /> >C16 <br /> 1 <br /> Quality Control Data <br /> Report Limit Multiplication Factor: 1.0 <br /> Date Extracted: 12/15/97 <br /> Date Analyzed: 12/15/97 <br /> Instrument Identification: HP-313 <br /> Extractable_Hydrocarbons are quantitated against afresh diesel standard. <br /> Analytes reported as N.D.were not detected above the stated reporting.limit. <br /> SEQUOIA ANALYTICAL, #1271 Please Note; <br /> *This sample"does not appear to contain diesel. "Unidentified Hydrocarbons >C16 refers to <br /> ignature on File unidentified peaks in the total oil and grease range. <br /> Alan B. Kemp <br /> Project Manager <br /> 7121025.MPD <4> <br />