Laserfiche WebLink
SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue Suite LM Concord, California 94 520 <br /> Iwo— (510) 686-9600 e FAX (510) 686-9689 <br /> A&PDS Services Client Project ID Unocal 6348, 3788 Tracy Blvd,Tracy <br /> 01 Stanwell Dr, Ste 400 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Avo Avedessian QC Sample Group 3120724-26 Reported Dec 22, 1993 <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 Tuzon A Tuzon A Tuzon A Tuzon <br /> MS/MSD <br /> Batch# 3120434 3120434 3120434 3120434 <br /> Date Prepared 12/18/93 12/18/93 12/18/93 12/18/93 <br /> Date Analyzed 12/18/93 12/18/93 12/18/93 12/18/93 <br /> Instrument I D # HP 4 HP-4 HP-4 HP-4 <br /> Conc Spiked 20yg/L 20pg/L 20pg/L 60Ng/L <br /> Matrix Spike <br /> % Recovery 110 110 110 110 <br /> 0 Matrix Spike <br /> Duplicate% <br /> Recovery 105 105 105 105 <br /> Relative% <br /> Difference 47 47 47 47 <br /> LCS. Batch# LCS121893 LCS121893 LCS121893 LCS121893 <br /> Date Prepared 12/18/93 12/18/93 12/18/93 12/18/93 <br /> Date Analyzed 12/18/93 12/18/93 12/18/93 12/18/93 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 <br /> LCS % <br /> Recovery 100 100 102 101 <br /> Recovery <br /> Control Limits 71-133 72-128 72-130 71-120 <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 aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to We entire analytical procedure M <br /> �7 the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Alatl emp <br /> Project Manaa r <br /> 3120724 MPD <2> <br />