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Superior precision Analytical, Inc. <br /> ^ 925 Arnold Drive Suite 1 14 • Martinez California 94553 ■ (5101 229 1 5 12 / fax {5 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 ERM-WEST DATE REPORTED 04/06/92 <br /> CLIENT JOB NO 1572 04 DATE SAMPLED 03/30/92 <br /> ANALYSIS FOR TOTAL LEAD <br /> by SW-846 Method 7421 <br /> LAB Concentration( mg/kg ) <br /> # Sample Identification --Total -Lead-- <br /> 1 MW1A 5 0 4 <br /> 2 MW1A 7 5 3 <br /> 3 MW3A 7 5 4 <br /> 4 MW3A 15 4 <br /> 5 MW2A 1C 3 <br /> 6 MW2A 13 5 3 <br /> 7 MW4A 10 3 <br /> 8 MW4A 15 3 <br /> mg/kg - parts per million ( ppm) <br /> Method Detection Limit for Lead in Soil I mg/kg <br /> Analysis a,.sbcontracted to Clayton Environmental <br /> QAQC Summary 14S/MSD Average Recovery 115 <br /> Duplicate RPD 1 <br /> rRichard Srna , Ph D <br /> Laboratory Manager <br /> Certified Laboratories <br />