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j SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 M <br /> }}Nu,vN wn 4ir\lFm* ,..n+ TXr_Rf vj" '" ry v rTrivv'+}r}J i.}+/ + w3 i4<J/inn + .. nry O f t+ .' ♦ r r 0.' <br /> RESNA Industries Client Project Ip Arco #2168, Stockton <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Cherven QC Sample Group 2050148-49 Reported May 12, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyi- <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 11, 1992 May 11, 1992 May 11, 1992 May 11, 1992 <br /> OC Sample# BLK051192 BLK051192 BLK051192 BLK051192 <br /> Sample Conc : N D N D N D N D <br /> Spike Conc. <br /> Added: 02 02 02 04 <br /> Conc. Matrix <br /> Spike: 017 017 017 036 <br /> Matnx Spike <br /> %Recovery: 85 85 85 90 <br /> Conc. Matnx <br /> Spike Dup : 017 017 017 035 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery. 85 85 85 88 <br /> Relative <br /> % Difference- 00 00 00 28 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> SEQUOIA ANALYTICAL %Reomry Conc of M S -Cone of Sample x 100 <br /> spike Conc Added <br /> Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Michael R Giles (Conc of MS + Conc of M S D) 2 <br /> Laboratory Director <br /> 2050148 RES <4> <br />