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5 <br /> Sequoia �`- <br /> �RO ChesaneaKe Drive i7�dwnna C CA 08063 1 i 5} 364 9600 eAX(415) 364 9233 <br /> 300 Bates Avenue 5uwce � Concorn CA )45 0 �10) n86 9600 FAX(510) 686 9689 <br /> Analvtleal 119 Striker Avenue Su:te 8 !:acramenco C-a 105934 16) 921 9600 FAX (9 16)921 0100 <br /> Brown & Caldwell Client Project ID Arco 434-94-5 Lodi <br /> 9616 Micron Ave Suite 600 Matrix air <br /> Sacramento CA 95827 <br /> Attention M1ndv Wriaht OC Sample Goup 4080704-705 Reported Aug 23, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xvlenes <br /> M uthod EDA 8020 t r' �o L„ c Pp 00--,i �+ " L-4 <br /> Analyst C Lee C Lee C Lee C Lee <br /> Concentration <br /> Spiked 2 0 mg/m3 2 0 maim, 2 0 mg/ml 6 0 mg/mJ <br /> LCS Batch# LCS 081894 LCS 081894 LCS 081894 LCS 081894 <br /> Date Prepared 8/18/94 8/18/94 8/18/94 6/18/94 <br /> Date Analyzed 8/18/94 8/18/94 6/18/94 8/18/94 <br /> Instrument 1 D # GCHP 2 GCHP 2 GCHP 2 GCHP-2 <br /> LCS % <br /> Recovery- 95 95 95 95 <br /> Control Limits 75 125 75 125 75 125- 75 125 <br /> MS/MSD <br /> Batch # BLK081894 BLK081894 BLK081894 BLK081894 <br /> Date Prepared. 8/18/94 8/18/94 8/18/94 8/18/94 <br /> Date Analyzed 8/18/94 8/16/94 8/18/94 8/18/94 <br /> Instrument 10 # GCHP-2 GCHP 2 GCHP-2 GCHP 2 <br /> Matrix Spike <br /> % Recovery 95 95 95 95 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 100 100 100 100 <br /> Rela4iv-e% <br /> Difference 51 51 51 51 <br /> SEQUOIA ANALYTICAL Please Note <br /> ` The LCS is a control sample of known lntertefent free matrix that is analyzed using the same reagen <br /> preparation and analytical methods employed for the samples The LCS%recovery data 1s used for <br /> ] validation of sample batch results Due to matrix effects the QC limits for MS/MSD's are advisory only <br /> Jennie Higgins and are not used to accept or reject batch results <br /> Prolect Manager 4080704 SRS <2> <br />