Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> t900 Sates Avenue, Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> WDS Services Client Project ID Unocal #6348, 3788 Tracy Blvd , Tracy <br /> 2401 Stanwell Dr, Ste 400 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Avo Avedessian QC Sample Group 4060426-29 Reported Jun 22, 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 J Fontecha J Fontecha J Fontecha J Fontecha <br /> MS/MSD <br /> Batch# 4060426 4060426 4060426 4060426 <br /> Date Prepared 6/20/94 6/20/94 6/20/94 6/20/94 <br /> Date Analyzed 6/20/94 6/20/94 6/20/94 6/20/94 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> Conc Spiked 20pg/L 20ftg/L 20pg/L 60Ng/L <br /> Matrix Spike <br /> % Recovery 110 110 110 110 <br /> sMatrix Spike <br /> Duplicate% <br /> Recovery 110 110 110 110 <br /> Relative % <br /> Difference 00 00 00 00 <br /> LCS Batch# 3LCS062094 3LCS062094 3LCS062094 3LCS062094 <br /> Date Prepared 6/20/94 6/20/94 6/20/94 6/20/94 <br /> Date Analyzed 6/20/94 6/20/94 6/20/94 6/20/94 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery 91 110 122 122 <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, #1271 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 the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recoveryis to be used to validate the batch <br /> �aKem <br /> Project Mana r <br /> 4060426 MPD <2> <br />