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Superior Precision analytical. Inc. <br /> 825 Arnold Drive Suite 1 14 ■ Martinez California 94553 ■ (5 10) 229 15 12 / fax 15 10) 229 1 526 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO 85361 DATE RECEIVED 03/30/92 <br /> CLIENT SRM—WEST DATE REPORTED 04/06/92 <br /> CLIENT JOB NO 1572 04 DATE SAMPLED 03/30/92 <br /> ANALYSIS FOR ETHYLENE DISROMIDE <br /> by EPA Method 504 <br /> LAB <br /> # Sample Identification Concentration (mg/kg ) <br /> ---- --------------------- ---------------- <br /> 1 MW1A 5 0 ND< 005 <br /> 2 MWiA 7 5 ND< 005 <br /> C MW3A 7 5 ND< 005 <br /> 4 MW3A 15 ND< 005 <br /> 5 MW2A 10 ND< . 005 <br /> P6 MW2A 13 5 ND< 005 <br /> 7 MW4A 10 ND< 005 <br /> 8 MW4A 15 ND< 005 <br /> mg/kg - parts per million ( ppm) <br /> Minimum Detection Limit for EDS 7n Soil = 0 005 mg/Kg <br /> Analys, s Subcontracted to Clayton Environmental <br /> QAQC Summary MS/MSD average recovery = 87 % <br /> RPD = 1 % <br /> r <br /> Richard Srna , Ph D <br /> Laboratory Manager <br /> Certified Laboratories <br />