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-SEQUOIA ANALYTICAL. <br /> 819 Striker Avenue, Suite 8-•-Sacramento, CA 95834 <br /> (916) 921-9600 • FAX-(916) 921-0100 <br /> ndustnes <br /> .............. v:}:- - <br /> erit�p�ro' <br /> - <br /> rco�21: <br /> 3164 - <br /> �Stockt`'n` <br /> � Gold Camp Dr., SuRe 200 Matrix:_. Soil <br /> Rancho Cordova, CA .9s670 . <br /> Attention Jay Johnson p <br /> r..� :......,...::.:....::: C Sample e Group 311-0355 <br /> _ _ Reported:-Nov 11 i 993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl Total_ <br /> : . Benzene Toluene benzene Xylenes Lead <br /> �; Method: EPA 8020 EPA-8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst: CLC CLC GLC CLC S.Foster <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg .0.60 mg/kg 12.5 mg/kg <br /> LCS Batch#: LCS 111093 LCS111093 LCSI11093 LCS 111093 LCS11119'3 <br /> Date prepared: 11/10/93 11/10/93 11/10/93 11/10/93 11/11/93 <br /> Date Analyzed 11/10/93 11/10/93 11/10/93 11/10/93 11%11/93 <br /> Instrurrtient I.O.#: HP-1 HP-1 HP-1 HP-1 PE-40 <br /> .LCS % <br /> Recovery: 100 90 100 88 98 <br /> Convo[Limits: 80-120- 80.120 80-120 80.120 80=120 <br /> MS/MSD <br /> 4 <br /> Batch#: 3101087 3101087 3101087 3101087 3110357 <br /> Date Prepared: 1.1/10/93 . 11/10/93 11/10/93 11/10/93 11/11/93 <br /> Date Arialyzed 11/10/93 11/10/93 11/10/93 11/10/93 11/11/93 <br /> instrument I.D.#: HP-1 HP-1 HP-1 HP-1 PE-40 <br /> Matrix Spike <br /> /6=13ecovery: 90 90 90 85 88 <br /> Matrix Spike <br /> Duplicate•% <br /> Recovery: 90 85 90 83 97 <br /> Relative% <br /> Difference: 0.0 5.7 0:0 2.4 9.7 <br /> Please Note: <br /> The LCS is a-control sample of known,interferent free matrix that is.anaiyzed using the-same reagents, <br /> SEQUOIA'ANALYTICAL preparation and'analyticalmethods employed for the samples. The LCS%recovery data is used for <br /> validation:of sample batch results. Due to matrix:effects,the QC limits for-MS/MSD's are advisory only <br /> and are not used.to accept or re'ect.batch results., <br /> Linda C.Schne' er <br /> Pro(ectManager 3116355.RES <4> <br />