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 /> 4tPDS Services Client Project ID Unocal #2859, 1665 Pacific Ave , Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group 7020891-899 Reported Mar 4, 1997 <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 K Nill K Nill K NIII K Nil] <br /> MS/MSD <br /> Batch# 7020810 7020810 7020810 7020810 <br /> Date Prepared 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Date Analyzed 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> Conc Spiked 20ftg/L 20jug/L 20pg/L 60Ng/L <br /> Matrix Spike <br /> % Recovery 110 115 80 115 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 110 115 80 118 <br /> Relative % <br /> Difference 00 00 00 29 <br /> LCS Batch# 9LCS022097 9LCS022097 9LCS022097 9LCS022097 <br /> Date Prepared 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Date Analyzed 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Instrument I D # HP-9 HP 9 HP-9 HP-9 <br /> LCS % <br /> Recovery 115 120 85 122 <br /> Recovery <br /> Control Limits 60-140 60-140 60-140 60-140 <br /> Please Note <br /> The LCS Is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> SE01.101A 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 /> l0ignature 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 /> 7020891 MPD <127 <br />