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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> ,.,��`�c,�,•<*4ti u��,svv.x,♦ #`m-»aV.G mom ,n,..t 3 w.,-n�..xK Y 4i„c 4 ..z...iv ldfN�r`{n,..,-},fi,.�.*�".r,�. E w s L wwo s rta*' <br /> RESNA II RJ ustn{ wv.%c.a%k2hGJ�Av's3tu�h�4".1.J;w.v �"c.KS.Ls.r�+c-,•sr a,r.msa xr'�:+ik,ms � .''a.:x<. ,;.r,r A,.�h,.x..k,'.,,r,` +rr'�'NixuW{. sdSSoi`ba�lom'4�c§w,.,. .,..^n ,>.a,� <br /> es Client Project ID Arco #2168, Stockton <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Cherven OC Sample Group 2050268-70 Reported May 26, 1992 <br /> n r {v ` ♦ r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Oil&Grease Diesel 1 1-D+chloroelhene <br /> EPA <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 413 2 8015 Mod EPA 8010 <br /> Analyst C Chapman C Chapman C Chapman C Chapman Chiaravallot Chiaravaiioti M !Nguyen <br /> Reporting Units ppb ppb ppb ppb ppm ppb ug/L <br /> Date Analyzed May 2o, 1992 May 20, 1992 May 20, 1992 May 20, 1992 May 21, 1992 May 19, 1992 May 13, 1992 <br /> QC Sample# 205-0295 205-0295 205-02955 205-0295 BLK052192 BLK051892 BLK051392 <br /> MS/MS0 <br /> Sample Conc. N D N D N D N D N D N D N D <br /> Spike Conc. <br /> Added: 10 10 10 20 5 600 10 <br /> Conc. Matrix <br /> Spike: 77 81 80 16 52 510 93 <br /> Matrix Spike <br /> % Recovery: 77 81 80 80 104 85 93 <br /> Conc. Matnx <br /> Spike Dup.. 80 85 82 17 51 500 89 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 80 85 82 85 102 83 89 <br /> Relative <br /> % Difference: 38 48 25 fi t 19 20 44 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> SEQUOIA ANALYTICAL %Racimery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Cone of M S D x 100 <br /> Michael R Giles (Conc of M S. + Conc of M S D) 2 <br /> Laboratory Director <br /> 2050268 RES <7> <br />