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Client No 408 Date 01/30/1992 <br /> Client Name: Brown & Caldwell Page: 7 <br /> NET Log No 92.0095 <br /> NET Pacific Inc <br /> Ref: Arco 2133, Stockton, 2133-91-58, Job 5690 <br /> QUALITY CONTROL DATA <br /> Cal Verf Duplicate <br /> Reporting Stand % Blank Spike % Spike % <br /> Parameter Limits Units Recovery Data Recovery Recovery RPD <br /> Gasoline 0.05 mg/L 114 NO 104 92 12 <br /> Benzene 0 5 ug/L 100 NO 91 82 10 <br /> Toluene 0.5 ug/L 112 NO 92 83 10 <br /> COMMENT Blank Results were NO on other analytes tested. <br /> Cadmium 0 02 mg/L 107 NO 89 91 2 4 <br /> Chromium 0.05 mg/L 104 NO 88 91 3 4 <br /> Copper 0 02 mg/L 106 NO 92 95 2 5 <br /> Lead 0 2 mg/L 108 NO 99 106 3.5 <br /> Nickel 0 05 mg/L 107 NO 92 94 2 7 <br /> Zinc 0.02 mg/L 103 NO 92 92 <1 <br /> QUALITY CONTROL DATA <br /> Cal Verf Duplicate Blank <br /> Reporting Stand % Blank Spike % Spike % Spike % <br /> Parameter Limits Units Recovery Data Recovery Recovery RPD Recovery <br /> Chlorobenzene 6 0 ug/L 100 NO 99 100 1 0 <br /> 1,1-Dichloroethene 4 7 ug/L 111 NO 87 79 10 -- <br /> Trichloroethene 1 9 ug/L 99 ND 102 102 1.0 -- <br /> Toluene 6.0 ug/L 102 NO 100 98 1.0 -- <br /> Benzene 4.4 ug/L 97 NO 105 103 1.0 -- <br /> Phenol 1 5 ug/L 130 NO 3 24 116 80 <br /> 2-Chlorophenol 3.3 ug/L 115 ND 13 36 93 87 <br /> 1,4-Dichlorobenzene 4.4 ug/L 115 NO 45 87 64 66 <br /> 1,2,4-Trichlorobenzene 1 9 ug/L 105 NO 52 98 61 75 <br /> 4-Nitrophenol 2 4 ug/L 140 NO 0 90 N/A 23 <br /> Pyrene 1 9 ug/L 93 NO 59 118 66 108 <br /> COMMENT Blank Results were NO on other analytes tested. <br />