Laserfiche WebLink
` Sequoia <br /> 680 Chesapeake Dnve 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)98$9673 <br /> r loco Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> WPDS Services Client Project ID Unocal #0187 437 8 Miner Stockton <br /> 2401 Stanwell Dr, Ste 300 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 Nil! K Nill K Nill K Nill <br /> MS/MSD <br /> Batch# 5080615 5080615 5080615 5080615 <br /> Date prepared 8/21/95 8/21/95 8/21/95 8/21/95 <br /> Date Analyzed 8/21/95 8/21/95 8/21/95 8/21/95 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 <br /> Conc Spiked 20yg/L 20Ng/L 20ug/L 60pg/L <br /> Matrix Spike <br /> % Recovery 95 95 95 97 <br />. Matrix Spike <br /> Duplicate % <br /> Recovery 85 90 90 93 <br /> Relative% <br /> Difference 11 54 54 35 <br /> LCS Batch# 2LCS082195 2LCS082195 2LCS082195 2LCS082195 <br /> Date Prepared 8/21/95 8/21/95 8/21/95 8/21/95 <br /> Date Analyzed 8/21/95 8/21/95 8/21/95 8/21/95 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 <br /> LCS % <br /> Recovery 101 105 106 106 <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 /> skignature on File the recovery of analytes from the matrix spike does not fail 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 /> 5080565 MPD <4> <br />