Laserfiche WebLink
Sequoia 630 ChesaoeaKe CnLe 2edwooa G(v CA 94063 '415) 36.1 9600 cAX(4t5) 364 9233 <br /> �•�� Analvt�eal 1900 Bates Avenue Suac L. Concord CA 94520 510) 686 9600 FAX (510) 686 9689 <br /> 160 319 Striker Avenue Suite 8 Sacramento CA 95834 916) 921 9600 FAX(916) 921 0100 <br /> J <br /> Brown & Caldwell Client Project ID Arco 2133-94-4A, Stockton CA <br /> 9616 Micron Ave Suite 600 Matrix Soil <br /> Sacramento, CA 95827 <br /> Attention Steve Misner QC Sample Goup 408-0886 Reported Aug 30, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst N Zahedl N Zahedl N Zahedl N Zahedl <br /> Concentration <br /> Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg o 60 mg/kg <br /> LCS Batch# LCS082594 LCS082594 LCS082594 LCS082594 <br /> Date Prepared 8/25/94 8/25/94 8/25/94 8/25/94 <br /> Date Analyzed 8/25/94 8/25/94 8/25/94 8/25/94 <br /> Ingtnirrient i it �t -un , <br /> LCS <br /> Recovery 113 110 110 111 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch #• 4080287 4080287 4080287 4080287 <br /> Date Prepared- 8/25/94 - — ' 8/25/94 8/25/94 f 8/25/94 - <br /> Date Analyzed 8/25/94 8/25/94 8/25/94 8/25/94 <br /> Instrument I D.# HP-1 HP-1 HP-1 HP-1 <br /> Matrix Spike <br /> % Recovery 77 84 88 89 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 81 87 91 91 <br /> Relative % <br /> Difference 5 1 35 34 22 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS Is a control sample of known,Interferent free matrix that Is analyzed using the same reagents, <br /> preparation and analytical methods 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/MSDs are advisory only <br /> Jennie Higgins and are not used to accept or reject batch results <br /> Project Manager <br /> 4080886 BRS <5> <br />