Laserfiche WebLink
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 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> IOMhDS Services Client project ID Unocal #2859, 1665 Pacific Avenue, Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Sarkis Karkarian QC Sample Group 5020605-13 Reported Feb 23, 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 A Tuzon A Tuzon A Tuzon A Tuzon <br /> MS/MSD <br /> Batch# 5020620 5020620 5020620 5020620 <br /> Date Prepared 2/13/95 2/13/95 2/13/95 2/13/95 <br /> Date Analyzed 2/13/95 2/13/95 2/13/95 2/13/95 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 <br /> Conc Spiked 20yg/L 20pg/L 20ug/L 60Mg/L <br /> Matrix Spike <br /> % Recovery 105 100 105 105 <br /> 0 Matrix Spike <br /> Duplicate% <br /> Recovery 110 105 105 107 <br /> Relative% <br /> Difference 47 20 00 19 <br /> LCS Batch# 1 LCS021395 1 LCS021395 1 LCS021395 1 LCS021395 <br /> Date Prepared 2/13/95 2/13/95 2/13/95 2/13/95 <br /> Date Analyzed 2/13/95 2/13/95 2/13/95 2/13/95 <br /> Instrument I D # HP-2 HP-2 HP-2 HP 2 <br /> LCS % <br /> Recovery 107 103 106 106 <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 /> 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 recove is to be used to validate the batch <br /> Project Manager <br /> 5020605 MPD <3> <br />