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QC Acceptability Umsts <br /> QC Check Duplicate Duplicate Water Soil Reagent <br /> Analyte Sample Water Soil Matrix Matrix Water <br /> Recovery Sample Sample Spike Spike Spike <br /> (°.6) RPD RPD Recovery Recovery Recovery <br /> Modified EPA 8020- <br /> Benzene 80- 120 30 30 55 - 129 24- 127 70 -147 <br /> Toluene 80- 120 30 30 72-149 17-124 67-150 <br /> Ethyibenzene 80- 120 30 30 75-138 19- 129 69-145 <br /> Xylene 80- 120 30 30 74-147 23 -124 71 -152 <br /> Modified EPA 8015: <br /> Gasoline --- 30 30 --- --- <br /> QC Check Duplicate Duplicate Water Soil Reagent <br /> Analyte Sample Water Sod Matnx Matrix Water <br /> Recovery Sample Sample Spike Spike Spike <br /> (%) RPD RPD Recovery Recovery Recovery <br /> (%) (%) (%) (%) (%) <br /> . Diesel -- 30 30 63-127 58- 144 48- 134 <br /> EPA 8010 8020 <br /> Chlorobenzene 80- 120 30 --- 34- 134 58-126 62-111 <br /> Benzene 80- 120 30 --- 66- 118 24- 127 58-127 <br /> Toluene 80- 120 30 — 53-115 17- 124 60-120 <br /> Ethyibenzene 80- 120 30 --- 43- 131 19- 129 58- 126 <br /> Xylene, total 80- 120 30 -- 55- 115 23 - 124 63 -128 <br /> 1,1-Dichloroethene 80- 120 30 -- 30- 160 72 - 116 56-138 <br /> Tnchloroethene 80- 120 30 — 78-184 79- 120 82-187 <br /> EPA 8080: <br /> L <br /> hlor 80- 120 30 -- --- 34- 111 34-111 <br /> 80- 120 30 — — 42 - 122 42 -122 <br /> 80- 120 30 --- -- 30 - 145 30-145 <br /> n 80-120 30 -- — 36-146 36-146 <br /> 80- 120 30 -- — 30 - 147 30- 147 <br /> 80- 120 30 — — 31 - 141 31 -114 <br /> 80-120 30 — -- 10- 180 10-180 <br /> or 1260 45- 127 30 — --- 53- 128 53-128 <br /> GTEL Concord,CA Page 1 of 2 <br /> March, 1992 <br /> GHEVOCLSET <br /> NGTEL <br /> ENVIRONMENTAL <br /> LABORATORIES INC <br />