Laserfiche WebLink
680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Sequoia <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 /> �IPDS Services Client Project ID 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 7090187-190 Reported Sep 25, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,1-Dlchloro- Tnchloro Chloro- <br /> ethane ethane benzene <br /> Method EPA 8010 EPA 8010 EPA 8010 <br /> Analyst K Nlll K NIII K Nill <br /> MS/MSD <br /> Batch# 7090091 7090091 7090091 <br /> Date Prepared 9115197 9115197 9115197 <br /> Date Analyzed 9115197 9115197 9/15197 <br /> Instrument I D # HP-7 HP-7 HP-7 <br /> Conc Spiked 10Ng/L 10 pg/L 10 pg/L <br /> Matrix Spike <br /> % Recovery 110 110 98 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 98 100 92 <br /> Relative% <br /> Difference 12 95 6 3 <br /> LCS Batch# 7LCS091697 7LCS091697 7LCS091697 <br /> Date Prepared 91155197 9115197 9115197 <br /> Date Analyzed 9116/97 9115197 9/15197 <br /> Instrument I D # HP-7 HP-7 HP-7 <br /> LCS % <br /> Recovery 100 96 81 <br /> % ecovery <br /> Control Limits 65-135 65-135 65-135 <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 /> �gnature 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 /> 7090187 MPD <12> <br />