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Client Number <br /> Project ID <br /> Work Order Number <br /> QC Check Sample Results <br /> Date of Expected <br /> Analyte Source Analysis Value Units Recoverya, % <br /> Modified EPA 8020 <br /> Benzene Supelco 09/09/93 50 ug/L 95 4 <br /> Toluene Supelco 09/09/93 50 ug/L 922 <br /> Ethylbenzene Supelco 09/09/93 50 ug/L 915 <br /> Xylene, total Supelco 09/09/93 150 ug/L 932 <br /> Metals <br /> Cadmium VHG LOT #21039H 09/10/93 500 ug/L 956 <br /> Chromium VHG LOT #210396 09/10/93 1000 ug/L. 101 <br /> Copper VHG LOT #21039H 09/10/93 1000 ug/L 102 <br /> Lead VHG LOT #21039H 09/10/93 50 ug/L 103 <br /> Nickel VHG LOT #21039H 09/10/93 1000 ug/L 101 <br /> Zinc VHG LOT #21039H 09/10/93 1000 u L 105 <br /> CSC Matrix Spike and Duplicate Spike Results <br /> Matrix Water <br /> Sample Date of Spike Recovery, Duplicate <br /> Analyte ID Analysts Amount Units % Recovery, % RPDa, % <br /> Modified EPA 8020 <br /> Benzene C3080410-2 09/07/93 200 ug/L 955 1030 76 <br /> Toluene 03080410-2 09/07/93 20 0 ug/L 945 1010 66 <br /> Ethylbenzene C3080410-2 09/07/93 200 ug/L 95 5 975 21 <br /> Xylene, total 03080410-2 09/07/93 60 0 ug/L 943 979 36 <br /> Metals. <br /> Cadmlum C3090044-1 09/10/93 2500 ug/L 852 964 12.3 <br /> Chromium C3090044-1 09/10/93 5000 ug/L 902 920 1 98 <br /> Copper C3090044-1 09/10/93 5000 ug/L 883 1 85 7 296 <br /> Lead 03090044-1 09/10/93 5000 ug/L 904 868 406 <br /> Nickel 03090044-1 09/10/93 5000 ug/L 91 4 90 2 1 1 32 <br /> Zinc C3090044-1 i09/10/93 5000 ug L 895 867 315 <br /> a See attached table for acceptability limits <br /> GTEI-Concord CA GTE L <br /> 03080475 PME <br /> f NV 1 RONM EN TAl <br /> LASORA110RIE3 INC <br />