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Client Acct: 28100 Date: 03/09/1993 <br /> Client Name: Harding Lawson Associates Page: 3 <br /> VET Log No: 93.00578 <br /> Ref: Breuners, Stockton, Job No. 23343 001 <br /> QUALITY CONTROL DATA <br /> Cal Verf _Duplicate <br /> Reporting Stand % Blank Spike % Spike % <br /> Parameter Limits Units Recovery Data Recovery Recovery RPD <br /> Diesel 1 mg/Kg 105 ND D* D* 27 <br /> Gasoline 1 mg/Kg 101 ND 87 79 9.0 <br /> Benzene 2.5 ug/Kg 98 ND 94 92 2.7 <br /> Toluene 2.5 ug/Kg 89 ND 104 101 3.3 <br /> pH pH units 100 N/A N/A N/A <1 <br /> Flash/Ignite Degree F 100 N/A N/A N/A <1 <br /> Sulfide 10 mg/Kg 102 ND 109 101 7.6 <br /> Cyanide 0.2 mg/Kg 93 NO 83 88 6.4 <br /> Lead 0.•002 mg/L 107 ND 75 75 <1 <br /> COMMENT: Blank Results were ND on other analytes tested. <br /> * Note: (D)Diluted, because a highly contaminated sample was used for spiking, <br /> the concentration of the spike was masked by the concentration of the sample. <br />