Laserfiche WebLink
' Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(4 15) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord CA 94520 (510) 686 9600 FAX(5 10)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> AW <br />*MPDS Services Client project ib Unocal #6981, 4707 Pacific Ave , Stockton <br /> 2401 Stanwell Dr, Ste 400 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Avo Avedissian QC Sample Group 5011287-299 Reported Feb 10, 1995 <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 M Creusere M Creusere M Creusere M Creusere <br /> MS/MSD <br /> Batch# 5010119 5010119 5010119 5010119 <br /> Date Prepared 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Date Analyzed 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> Conc Spiked 20ug/L 20pg/L 20ftg/L 60pg/L <br /> Matrix Spike <br /> % Recovery 105 110 110 110 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 110 110 110 108 <br /> Relative% <br /> Difference 47 00 0 0 1 8 <br /> LCS Batch# 3LC8020695 3LC8020695 3LCS020695 3LCS020695 <br /> Date Prepared 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Date Analyzed 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery 94 96 98 98 <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 />,Signature on File 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 /> Alan B Kemp <br /> Project Manager <br /> 5011287 MPD <8> <br />