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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,620 W Charter Way,Stockton Sampled Feb 19-20, 1993 <br /> 985 Timothy Drive Sample Matrix Water Received Feb 24, 1993 <br /> San Jose, CA 95133 Analysis Method EPA 5030/8015/8020 Reported Mar 9, 1993 <br /> Attention Glen Bennett First Sample# 3BB6101 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D. I D I.D. 1 D. I.D. 1 D. <br /> ug/L 3BB6101 3BB6102 3BB6103 3866104 3BB6105 3BB6106 <br /> MW-1 MW-3 MW-5 MW-6 MW-7 MW-8 <br /> Purgeable <br /> Hydrocarbons 50 300 1,800 170 N D 43,000 6,600 <br /> Benzene 050 76 N D 74 N D 360 1,200 <br /> Toluene 050 13 N D 0 61 N D 1,400 81 <br /> Ethyl Benzene 050 92 N D 27 N D 1,000 69 <br /> Total Xylenes 050 68 430 35 N D 5,300 650 <br /> Chromatogram Pattern Gas Weathered Gas - Gas Gas <br /> Gas <br /> Quality Control Data <br /> Report Limit <br /> Multiplication Factor 4 0 20 1 0 1 0 100 100 <br /> Date Analyzed 3/1/93 2/27/93 3/1/93 3/3/93 2/27/93 2/27/93 <br /> Instrument Identdication GCHP-6 GCHP-6 GCHP-6 GCHP-7 GCHP-6 GCHP-6 <br /> Surrogate Recovery, % 92 94 94 118 100 102 <br /> (OC 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 <br /> ,"- C� <br /> is Lee <br /> ' roject Manager 3BB6101 SLA <I <br />