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j SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> . (916) 921-9600 • FAX (916) 921-0100 <br /> �t �i`obxSkx .w�..i�.d.�. �,s n�''`.' !.'�f„t;7n'�,w�s�"."%��St�nn„v"..";.. .,.y.CP" K^' tira`�.,`.+Van+c.a..J�,..u.,,,. ectos�iy a�hc. .•ygc�.�n'S,,- <br /> RESNA industries Client Project ID Arco #2168, Stocktonry <br /> 3164 Gold Camp Dr, Suite 20o <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Cherven QC Sample Group 2040705-13 Reported May 13, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst C Chapman C Chapman C Chapman C Chapman <br /> Reporting Units ppm ppm ppm ppm <br /> Date Analyzed May 6, 1992 May 6, 1992 May 6, 1992 May 6, 1992 <br /> CC Sample# 2as-0025 205-0025 205-0025 205.x025 <br /> Sample Cone.. N D N D N D N D <br /> Spike Cone. <br /> Added: 02 02 02 04 <br /> Cone. Matrix <br /> Spike: 017 017 018 036 <br /> Matnx Spike <br /> %Recovery: 85 85 90 90 <br /> Cone. Matrix <br /> Spike Dup.: 018 018 019 038 <br /> Matmx Spike <br /> Duplicate <br /> % Recovery: 90 90 95 95 <br /> Relative <br /> % Difference., 57 57 54 54 <br /> Duality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample X 100 <br /> Spike Conc Added <br /> (/ Relative%Dfference Conc of MS -Cone of M S D X 100 <br /> Michael R Giles (Cone of M S + Conc of M S D) 2 <br /> Laboratory Director <br /> 2040705 RES <10> <br />