Laserfiche WebLink
Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 H Wiget Lane Walnut Creek CA 94598 (SIO) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> MPDS Services Client Project 1D Unocal #0123, 1034 Central Ave , Tracy <br /> 2401 Stanwell Dr , Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group Reported Dec 28, 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 N Beaman N Beaman N Beaman N Beaman <br /> MS/MSD <br /> Batch# 5121135 5121135 5121135 5121135 <br /> Date Prepared 12/20/95 12/20/95 12/20/95 12/20/95 <br /> Date Analyzed 12/20/95 12/20/95 12/20/95 12/20/95 <br /> Instrument I D # HP-5 HP-5 HP 5 HP-5 <br /> Conc Spiked 20 jig/L 20pg/L 20 pg/L 60 deg/L <br /> Matrix Spike <br /> % Recovery 90 90 90 92 <br /> . Matrix Spike <br /> Duplicate % <br /> Recovery 100 95 100 102 <br /> Relative % <br /> Difference 11 54 11 10 <br /> LCS Batch# 3LCS122095 3LCS122095 3LCS122095 3LCS122095 <br /> Date Prepared 12/20/95 12/20/95 12/20/95 12/20/95 <br /> Date Analyzed 12/20/95 12/20/95 12/20/95 12/20/95 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery 85 80 80 83 <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 /> Oignature 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 /> 5120563 MPD <87 <br />