Laserfiche WebLink
,T) 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 /> qQF Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> OMPD8 Services Client Project ID Unocal #5421, 7303 Pacific Ave , Stockton <br /> 2401 Stanwell Dr, Ste 400 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Avo Avedissian QC Sample Group 41 201 41 4-41 7 Reported Dec 19, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 Mod <br /> Analyst A Tuzon A Tuzon A Tuzon A Tuzon K V S <br /> MS/MSD <br /> Batch# 4120390 4120390 4120390 4120390 BLK120994 <br /> Date Prepared 12/12/94 12/12/94 12/12/94 12/12/94 12/9/94 <br /> Date Analyzed 12/12/94 12/12/94 12/12/94 12/12/94 12/13/94 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 HP-3A <br /> Conc Spiked 20ftg/L 20pa/L 20pg/L 60frg/L 300ug/L <br /> Matrix Spike <br /> % Recovery 110 110 120 112 80 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 110 105 105 107 82 <br /> Relative % <br /> Difference 00 46 46 46 25 <br /> LCS Batch# 1 LCS121294 1 LCS121294 1 LCS121294 1 LCS121294 BLK120994 <br /> Date Prepared 12/12/94 12/12/94 12/12/94 12/12/94 12/9/94 <br /> Date Analyzer! 12/12/94 12/12/94 12/12/94 12/12/94 12/13/94 <br /> Instrument I D.# HP-2 HP-2 HP 2 HP-2 HP-3A <br /> LCS % <br /> Recovery 104 107 107 104 80 <br /> % ecovery <br /> Control Limits 71-133 72-128 72-130 71-120 28-122 <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 /> Signature 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 recovery is to be used to validate the batch <br /> Project Manager <br /> 4120414 MPD <5> <br />