Laserfiche WebLink
Sequoia 0680 Chesapeake Drive Redwood City,CA 94060(415) 364 9600 FAX(415) 364 9233 <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 /> *PDS Services Client Project ID Unocal #5886, 2701 W March Ln, Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group 7030718-720 Reported Mar 21, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes MTBE Diesel <br /> Benzene <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8260 EPA 8015 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb L Duong D Sharma <br /> MS/MSD <br /> Batch# 7030466 7030466 7030466 7030466 970381601 BLK031397 <br /> Date Prepared 3/14/97 3/14/97 3/14/97 3/14/97 3/17/97 3/13/97 <br /> Date Analyzed 3/14/97 3/14/97 3/14/97 3/14/97 3/17/97 3/14/97 <br /> Instrument I D # HP-4 HP-4 HP-4 HP 4 H 6 HP-3A <br /> Conc Spiked 20ug/L 20pg/L 20ug/L 60yg/L 50pg/L 3001eg/L <br /> Matrix Spike <br /> % Recovery 90 95 95 98 116 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 90 95 95 98 112 90 <br /> Relative% <br /> Difference 00 00 00 00 35 00 <br /> LCS Batch# 4LCS031497 4LCS031497 4LCS031497 4LCS031497 VMB0317S LCS031397 <br /> Date Prepared 3/14/97 3/14/97 3/14/97 3/14/97 3/19/97 3/13/97 <br /> Date Analyzed 3/14/97 3/14/97 3/14/97 3/14/97 3/19/97 3/14/97 <br /> Instrument I D # HP-4 HP-4 HP-4 HP 4 H-6 HP 3A <br /> LCS % <br /> Recovery 90 95 95 98 116 107 <br /> ecovery <br /> Control Limits 60-140 60-140 60-140 60 140 60 140 <br /> Please Note <br /> The LCS 1s 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 /> &#1210 fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> 4kignature on File 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 /> Alan B Kemp <br /> Project Manager <br /> 7030718 MPD <6> <br />