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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> Blaine Tech Services, Inc Client Project ID Shell, 6131 Pacific Ave Stockton Sampled Jan 11, 1993 <br /> 985 Timothy Drive Sample Matrix Water Received Jan 12, 1993 <br /> San Jose, CA 95133 Analysis Method EPA 5030/8015/8020 Reported Jan 25 1993 <br /> Attention Glen Bennett First Sample # 301-1272 Revised Feb 9, 1993 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> pg/L 301-1272 301-1273 301-1274 301-1275 <br /> MW-1 MW-2 MW-4 TB <br /> Purgeable <br /> Hydrocarbons 50 98 290 100 N D <br /> Benzene 050 33 28 21 N D <br /> Toluene 050 N D N D N D N D <br /> Ethyl Benzene 050 N D 63 N D N D <br /> • Total Xylenes 050 N D N D N D N D <br /> Chromatogram Pattern Weathered gas * Weathered Weathered <br /> Non gas mix gas gas + Non gas <br /> C8 Non Gas mix <br /> Mix <C8 c C8 <br /> Quality Control Data <br /> Report Limit <br /> Multiplication Factor 1 0 50 so 1 0 <br /> Date Analyzed 1/13/93 1/13/93 1/13/93 1/13/93 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 82 77 74 73 <br /> PC Limits = 70-130%) <br /> I <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 ANALYTI AL <br /> Al n Lee a <br /> roject Manager 3011272 BLA a 1> <br />