Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (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 /> 1MPD8 Services Client Project ID Unocal <br /> j #5098, 5606 Pacific Ave , Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Sarkis Karkarjan OC Sample Group 5091615-20 Reported Oct 5, 1995 <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 J Fontecha J Fontecha J Fontecha J Fontecha <br /> MS/MSD <br /> Batch# 5091426 5091426 5091426 5091426 <br /> Date Prepared 10/3/95 10/3/95 10/3/95 10/3/95 <br /> Date Analyzed 10/3/95 10/3/95 10/3/95 10/3/95 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> Conc Spiked 20Ng/L 20pg/L 20,ug/L 60,ug/L <br /> Matrix Spike <br /> % Recovery 95 95 90 93 <br /> SMatrix Spike <br /> Duplicate % <br /> Recovery 100 95 95 95 <br /> Relative % <br /> Difference 51 00 54 18 <br /> LCS Batch# 3LC8100395 3LC8100395 3LCS100395 3LC8100395 <br /> Date Prepared 10/3/95 10/3/95 10/3/95 10/3/95 <br /> Date Analyzed 10/3/95 10/3/95 10/3/95 10/3/95 <br /> Instrument I D # HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery 105 101 100 101 <br /> Recovery <br /> Control Limits 71-133 72-128 72-130 71-120 <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 /> 5091615 MPD <5> <br />