Laserfiche WebLink
Sequoia 6W Chesapeake Drive Redwood City CA 94063 {650)364 9600 FAX(650)3649233 <br /> 404 N 4V)get Lane Walnut Creek CA 94598 (9z5)988 9600 FAX(925)988.9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 J9 16)921 9600 FAX(916)921-0100 <br /> ,o 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical <br /> 1551 Industrial)toad San Carlos CA 94070-41 11 (650)232-9600 FAX(650)232-9612 <br /> 4;6ettler-Rlyan -Dublin Client Project ID Unocal S8#5886, Stockton <br /> 6747 Sierra Court, Suite J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding QC Sample Group 9060540-560 Reported Jun 17, 1999 <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 D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD <br /> Batch# 9060558 9060558 9060558 9060558 <br /> Date Prepared 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Date Analyzed 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Instrument I D # HP-2 HP-2 HP-2 HP 2 <br /> Conc Spiked 20 ug/L 20 Ng/L 20 pg/L 60pg/L <br /> Matrix Spike <br /> % Recovery 100 90 85 98 <br /> �f Matrix Spike <br /> Duplicate % <br /> Recovery 100 90 100 103 <br /> Relative% <br /> Difference 00 00 16 50 <br /> LCS Batch# 2LCS061099 2LCS061099 2LCS061099 2LCS061099 <br /> Date Prepared 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Date Analyzed 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Instrument 1 D # HP-2 HP-2 HP-2 HP-2 <br /> LCS % <br /> Recovery: 95 90 90 98 <br /> Recovery <br /> Control Limits 70-130 70-130 70-130 70.130 <br /> Please Note <br /> The LCS is a control sample of known,interferent tree 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 /> 4 1�X the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> {/ interference,the LCS recove is to be used to validate the batch <br /> ulianne Fegley <br /> Project Manager <br /> 9060540GET <32> <br />