Laserfiche WebLink
K SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> 11I (510) 686-9600 FAX (510)686-9.689 <br /> ......;: <br /> MPDS Services, Inc. Client Project ID: Unocal 0798,'8203 E. 11th St.,Tracy <br /> 2401 Stanwell Dr., Ste. 400 Matrix: Liquid <br /> Concord, CA 94520 <br /> Attention: Avo Avedissian QC Sample Group: 4021110-19 Reported: Mar 7, 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 <br /> Analyst: M.Nguyen M,Nguyen M. Nguyen M.Nguyen.. K.Wimer <br /> I MS/MSD <br /> a <br /> Batch#: 4021110 4021110 . 4021110 4021110, BLK022594 <br /> 4 Date Prepared: 2/28/94 2/28/94 2/28/94 2/28/94 2/25/94 <br /> Date Analyzed: 2/28/94 2/28/94 2/28/94 2/28/94 3/2/94 <br /> Instrument I.D.#: ML#2 ML#2 ML#2 ML#2 HP-3A <br /> Conc. Spiked: 20 pg/L 20 Ng/L 20µg/L 60 Ng/L 300 Ng/L <br /> Matrix Spike = <br /> % Recovery:. 80 75 85 83 81 <br /> Matrix Spike <br /> Duplicate <br />{ Recovery: 85 90 95 95 92 <br />! Relative <br />�. Difference: 6.1 18 11 13 13 <br /> ........................... _ ........... <br /> _:::................................. <br /> LCS Batch#: LCS022894 LCS022894 LCS022894 LCS022894. BLK022594 <br /> Date Prepared: 2/28/94 2/28/94 2/28/94 2/28/94- 2/25/94 <br /> Date Analyzed: ,. 2/28/94 2/28/94 2/28/94.. 2/28/94 3/2/94 <br /> Instrument I.D.#: ML#2 ML#2 ML#2 ML#2 HP-3A <br /> t LCS °i° <br /> Recovery: 95 95 100 99 81 <br /> Recovery <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 /> r SEQUOIA ANALYTICAL 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 /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> 111- interference,the;LCS recovery is to be used to validate the batch. <br /> AKemp <br /> roject M10anager <br /> 4021110.MP0 <5>. <br />