Laserfiche WebLink
w <br /> r <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 4D <br /> 404 N W,gei Lane Walnut Creek CA 94596 (510) 966 9600 FAX(510)968 9573 <br /> 11co Analytical 819 Sinker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> IRPDS Services Client Project ID Unocal #6981 4707 Pacific Ave Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group 5102461-471 Reported Nov 15, 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 K Nill K Nill K Nil K Nill <br /> MS/MSD <br /> Batch# 5102448 5102448 5102448 5102448 <br /> Date Prepared 11/8/95 11/8/95 11/8/95 11/8/95 <br /> Date Analyzed 11/8/95 11/8/95 11/8/95 11/8/95 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> Conc Spiked 20pg/L 20u9/L 20Mg/L 60Ng/L <br /> Matrix Spike <br /> %Recovery 110 115 110 123 <br /> • Matrix Spike <br /> Duplicate% <br /> Recovery 95 95 95 107 <br /> Relative % <br /> Difference 15 19 15 14 <br /> LCS Batch# 4LCS110895 4LCS110895 4LCS110895 4LCS110895 <br /> Date Prepared 11/8/x5 11/8/95 11/8/95 11/8/95 <br /> Date Analyzed 11/8/95 11/8/95 11/8/95 11/8/95 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> LCS % <br /> Recovery 100 98 100 113 <br /> Recovery <br /> Control Limits 71-133 72128 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 /> Ognature 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 /> 5102461 MPD <6> <br />