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— MEMORANDUM <br /> Dete: March 12, 1993 <br /> To: Melody L. Allea, Projact Manager <br /> _ From: Robert Srlisbury, Smff Chemirt <br /> Subj: Datt Validation Review <br /> Metals Soil Da4 <br /> City of&verott Proposed North-East View Park, 03352-021-005 <br /> The data validation roviaw of 2 soil samples colfected on Febnury 2, 1993, 6u been wmpletal, 'Ibe <br /> s�mPles were analyz«l for atseoic, barium, cadmium, chromium, lead, meccury, selenium, silver. and rinc by <br /> DBeM La�wraWries(D&M)locr.tod in Petaluma,Califomia. 1'he analyses werc pedormed using fiPA Method 7470 <br /> (mercury), &PA MetLod 7060(arseaic),HPA Mefhod 7740(selenium),a�d fiPA Method 6010(baeium, cadmium, <br /> chromium,lead,silver,and zinc;iu accord�nce with SW.gq6(Test Methods for fivaluatiag Solid Waste,September, <br /> 1986). Summaries of the sample da4 and I�boratory pC dyta were pbvided by D&M. The following samples aro <br /> associated with labontory case number(or acttssioe number)930258: <br /> �, Sample Number D&M Number <br /> LP-1 34792 <br /> �P'2 34793 <br /> 1'he following commeats rekr to D&M's parformmce in meeting the quality acsurance control specification <br /> described in SW-846 and in Wo EPA document •Labontory Data Validatinn Functional Guidelines for Evaluating <br /> inorganic Anatyses•, July 1988. <br /> I. Holding Time - pcceptable <br /> � 2• Blanlcs -Acceplable <br /> _ 3. Duplicate Sample Analysis-Acceptable <br /> ,.., 4. Matrix Spike Sample Melysis <br /> • T6e follawing matrix spike recoveries (%R) were outside the QC limits of 75-12596: <br /> Me1a1 q,R <br /> Barium 64.5 <br /> " Cadmium 66.l <br /> Chromium 65.8 <br /> � I.ead 67.5 <br /> � Silver 73.2 <br /> Zioc 72.0 <br /> — t <br />