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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue Suite LM • Concord California 94520 <br /> 15101 686 9600 • FAX 1510) 686 9689 <br />*Alton Geoscience Client Project tD Mobil #04-NP4/ 30-0140-02 Sampled May 27, 1992 <br /> 5870 Stoneridge Drive, Surte 6 Matrix Descript Water Received May 27, 1992 <br /> Pleasanton, CA 94588 Analysis Method EPA 3510/8015 Extracted May 28, 1992 <br /> Attention Cynt Yong First Sample # 205-1242 Analyzed May 28, 1992 <br /> Reported May 29, 1992 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS (EPA 8015) <br /> Sample Sample High B P <br /> Number Description Hydrocarbons <br /> ug/L <br /> (ppb) <br /> 205-1242 1t N D <br /> 205-1243 E 1 N D <br /> 0 <br /> Detection Limits: 50 <br /> High Boding Pont Hydrocarbons are quantitated against a diesel fuel standard <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> Scott A Ch�effo 205122 ALT <2> <br /> Project Manage <br />