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`L <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> rwtn <br /> diett P�o�ecfl[�: #aSO� fS" <br /> X35 Grogan Ave., Ste A Matrix: Soll <br /> Merced, CA 95344 <br /> Report -edAug 5, 1993 <br /> .'Attention: Roy Austin <br /> i <br /> OC Sample Group; _ - <br /> OUALiTY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst: J.F. J.F. J.F. J.F. K.Wimer <br /> Conc. Spiked: 0.40 0,40 0.40 1.2 10 <br /> Units: mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg <br /> LCS Batch#: 3LCS080393 3LCS080393 3LCS080393 3LCS080393 BLK072393 <br /> Dale Prepared: 8/3/93 8/3/93 8/3/93 8/3/93 7/23/93 <br /> Date Analyzed: 8/3/93 8/3/93 8/3/93 8/3/93 7/28/93 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> LCS % <br /> Recovery: 111 120 120 127 110 <br /> Control Limits: 70-130 70-130 70-130 70-130 80.120 <br /> .:.,.:.::.•:::G:x.s.:u <br /> : .n..co.:r•t:-:w:...::......::}.:n <br /> .::o::c::.::c::":,::::::i.>yr.x?}:•.:<•::;.:.,...:.. <br /> :.:.................. .r_,., i.:.:,i'"'} <br /> MS/MSD <br /> Batch #: 3070019 3070019 3070019 3070019 3070814 <br /> Date Prepared: 8/3/93 8/3/93 8/3/93 8/3/93 7/23/93 <br /> Date Analyzed: 8/3/93 8/3/93 8/3/93 8/3/93 7/28/93 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> Matrix Spike <br /> % Recovery: 105 107 107 104 121 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 102 105 105 103 116 <br /> Relative% <br /> Difference: 2.9 1.9 1.9 0.96 4.2 <br /> SEQUOIA ANALYTICAL PleaseNote; <br /> The LCS Is a control sample of known,Interferent free matrix that Is analyzed using the same reagents. <br /> I preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> G;.'..'.. ( validation of sample batch results, Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results. <br /> Itaren L. Enstrom <br /> Project Manager <br /> 3071039.WWI <5> <br />