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SEQUOIAi <br /> ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 I <br /> 1 <br /> E <br /> ,RESNA-Es <br /> calon <br /> Client Project ID" W04801, PG&E Stockton Service Ctr. <br /> :.. <br /> 1710 Main Street <br /> <Escalan, CA 95320 <br /> Attention Lois Frantz CC Sample Group 3012035 -40 Reported: ,}an 24, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTEEthyl• Extractable Oil & 1260 PCB <br /> Benzene Toluene Benzene Xylenes Hydrocarbons Grease <br /> i <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 SM5520E&F EPA 800 <br /> Analyst: B.AIi B.Ali B.Ali B.Ali C.Lee M.Shkidt LLaikhtman <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg ug/kg <br /> Date Analyzed: Jan 19, 1993 Jan 19, 1993 Jan 19, 1993 Jan 19, 1993 Jan 15, 1993 Jan 20, 1993 Jan 29, 1993 <br /> QC Sample#: G3012035 G3012035 (33012035 G301P035 D3011734 BLK012093 301-2037 <br /> 'I <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. N.D. N.D. <br /> i <br /> I <br /> Spike Conc. <br /> Added: 0.20 0.20 0.20 0.610 15 1000 Soo <br /> Conc. Matrix <br /> Spike: 0.16 0.16 0.16 0.47 12 950 500 <br /> 'I <br /> Matrix Spike <br /> %Recovery: 80 80 80 78 80 95 100 <br /> i <br /> Conc. Matrix <br /> Spike Dup.: 0.16 0.15 0.16 0.46 12 890 740 <br /> Matrix Spike <br /> Duplicate <br /> • Recovery: 80 75 80 77 80 89 150 <br /> Relative <br /> • Difference: 0.0 6.5 0.0 2.2 0.0 6.5 39 <br /> ;i <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-;IConc.of Sample x 100 <br /> Spike Conc.Added <br /> 1 <br /> I <br /> /� Relative% Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> ri L e ! (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> roject Manager 301-2035.WAT <17> <br /> I <br />