Laserfiche WebLink
Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> �I,7 <br /> OMPOS Services Client Project IC) Unocal #0187, 437 E Miner, Stockton <br /> 2401 Stanwell Dr, Ste 340 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Sarkis Karkarian QC Sample Group 5080565-67 Reported Aug 24, 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 K Nill K Nill K Nill K Nill <br /> MS/MSD <br /> Batch# 5080614 5080614 5080614 5080614 <br /> Date Prepared 8/20/95 8/20/95 8/20/95 8/20/95 <br /> Date Analyzed 8/20/95 8/20/95 8/20/95 8/20/95 <br /> Instrument I D.# HP-5 HP-5 HP-5 HP-5 <br /> Conc. Spiked- 20Mg/L 20pg/L 20pg/L 60ug/1- <br /> Matrix Spike <br /> % Recovery 100 100 95 100 <br />. Matrix Spike <br /> Duplicate% <br /> Recovery 95 95 90 95 <br /> Relative% <br /> Difference 51 51 5 4 44 <br /> LCS Batch# 3LCS082095 3LCS082095 3LCS082095 3LCS082095 <br /> Date Prepared 8/20/95 8/20/95 8/20/95 8/20/95 <br /> Date Analyzed 8/20/95 8/20/95 8/20/95 8/20/95 <br /> Instrument I D #• HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery. 96 95 93 96 <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 /> 5080565 MPD <3> <br />