Laserfiche WebLink
.r <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates 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 /> 0M1,PD8 Services Client project ID Unocal #5098, 5606 Pacific Ave, Stockton <br /> 21 Stanwell Dr, Ste 400 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Avo Avedessian QC Sample Group 4061378-81 Reported Jul 13, 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 Foritecha J Fontecha J Fontecha <br /> MS/MSD <br /> Batch# 4061378 4061378 4061378 4061378 <br /> Date Prepared 7/7/94 7/7/94 7/7/94 7/7/94 <br /> Date Analyzed 7/7/94 7/7/94 7/7/94 7/7/94 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 <br /> Conc. Spiked 20 Erg/L 20 pg/L 20 Erg/L 60 ug/L <br /> Matrix Spike <br /> % Recovery 90 95 95 98 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 90 95 100 100 <br /> Relative % <br /> Difference 00 00 51 20 <br /> LCS Batch# 1 LCS070794 1 LCS070794 1 LC8070794 1 LCS070794 <br /> Date Prepared 7/7/94 7/7/94 7/7/94 7/7/94 <br /> Date Analyzed 7/7/94 7/7/94 7/7/94 7/7/94 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 <br /> LCS % <br /> Recovery 96 100 104 99 <br /> ecovery <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 recovery is to be used to validate the batch <br /> P <br /> Project a ager <br /> 4061378 MPD <6> <br />