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j SEQUOIA ANALYTICAL <br /> 819 Stoker Avenue, Suite 8 • Sacramento, CA 95834 <br /> Iwo (916) 921-9600 • FAX (916) 921-0100 <br /> ria re}'Ara,. 4i''et'^� � t?rn; arww^4-�4�.wu�At.ca i°c'Ho-hrr an`f,� N7 �r r`� .... '�t�7,�A ham`^ter •t,�+t #�k`-' ` '< <br /> hz...�;ac+Ck"wY2 tdk�, 2�e�'t�°'�.w�+�- ra.,c,r} ,..t,.,,. .L..... r�mrtw.trs..�u�a.%w` <� ,u x.,:..�.�s". t u+.+'Y,rc ,.. ,• <br /> RESNA industries tient Project lD Arco#2168, Stockton <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Cherven OC Sample Group 2050150-62 Reported May 21, 1992 <br /> r ihC44 n ^v h r , ^^ • ,}z ry}+pOJnv'.}4 nC + 4 r r r+♦ +.+ f ryk 4 r v n +n S v c }v 1 r r my r r v ♦r r } } S <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Benzene Toluene Eth benzene Xylenes Lead <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst C Chapman C Chapman C Chapman C Chapman S Foster <br /> Reporting Units ppm ppm ppm ppm mg/kg <br /> Date Analyzed May 18, 1992 May 18 1992 May 18 1992 May 18, 1992 May 12 1992 <br /> QC Sample# BLK051892 BLK051892 BLK051892 BLK051892 205-0197 <br /> Sample Conc.: N D N D N D N D 64 <br /> Spike Conc. <br /> Added. 02 02 02 04 50 <br /> Conc. Matrix <br /> Spike. 017 018 018 036 52 <br /> Matrix Spike <br /> % Recovery: 85 90 90 90 91 <br /> Conc. Matrix <br /> Spike Dup.: 017 018 018 037 52 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery- 85 90 90 92 91 <br /> Relative <br /> % Difference 00 00 00 27 0 0 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> SEQUOIA ANALYTIC %Recovey Conc of M S -Conc of Sample X 100 <br /> Spike Conc Added <br /> Relative%CAfferenoe Conc of M S -Cone of MSD X 100 <br /> Michael R Giles (Conc of M S + Conc of MSD)/2 <br /> Laboratory Director <br /> 2050150 RES <6> <br />