Laserfiche WebLink
SEQUOIA ANALYTICAL <br /> f 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> Aegis Environmental Consultants Client Project ID Sheil, Tracy <br /> 1050 Melody Lane, Suite 160 Matrix Liquid <br /> Roseville, CA 95678 <br /> Attention David Poulsen QC Sample Group 4BA1701-6 Reported Mar 2, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst A Maralit A. Maralit A.Marajit A. Maralit <br /> MS/MSD <br /> Batch# 4895511 4895511 46955111 4895511 <br /> Date Prepared: - - - - <br /> Date Analyzed 2/18/94 2/18/94 2/18/94 2/18/94 <br /> Instrument I.D # GCHP-6 GCHP-6 GCHP-6 GCHP-6 <br /> Conc Spiked- 10 mg/L 10 ug/L 10,ug/L 30 jug/L <br /> Matrix Spike <br /> % Recovery 94 98 99 97 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 83 88 90 87 <br /> Relative % <br /> Difference 12 11 95 11 <br /> LCS Batch# - - <br /> Date Prepared - <br /> Date Analyzed <br /> Instrument I D # - - - <br /> LCS % <br /> Recovery- - - - - <br /> °� Recovery <br /> Control Limits 71-133 72-128 72-130 71-124 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an ajiquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure if <br /> r/�j1V� the recovery of analytes from the matrix spike does not fall within specified control limas due to matnx <br /> 111 YYY ! 111 -L,� interference,the LCS recovery is to be used to validate the batch <br /> Vickie TagueJ <br /> Project Manager 4BA1701 AEG <2> <br />