Laserfiche WebLink
e 1 Sequoia 680 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 95634 (916) 921 9600 FAX(916)921 0100 <br /> 4tPDS Services Client Project 1D Unocal #0187 437 Miner Ave <br /> e ,S ockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group 6020403-414 Reported Feb 23, 1996 <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 L Huang L Huang L Huang L Huang <br /> MS/MSD <br /> Batch# 6020559 6020559 6020559 6020559 <br /> Date Prepared 2/19/96 2/19/96 2/19/96 2/19/96 <br /> Date Analyzed 2/19/96 2/19/96 2/19/96 2/19/96 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> Conc Spiked 20ug/L 20,ug/L 20ug/L 60pg/L <br /> Matrix Spike <br /> % Recovery 97 95 95 95 <br />• Matrix Spike <br /> Duplicate % <br /> Recovery 87 90 90 92 <br /> Relative % <br /> Difference 11 54 5 4 36 <br /> LCS Batch# 3LC8021996 3LCS021996 3LCS021996 3LCS021996 <br /> Date Prepared 2/19/96 2/19/96 2/19/96 2/19/96 <br /> Date Analyzed 2/19/96 2/19/96 2/19/96 2/19/96 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery 95 90 95 95 <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 subfected to the entire analytical procedure If <br /> Oignature on File the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Alan B Kemp interference,the LCS recovery is to be used to validate the batch <br /> Project Manager <br /> 6020403 MPD <3> <br />