Laserfiche WebLink
4 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 /> WOAnalytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> WDS Services Client Project ID Unocal #5098, 5606 Pacific Ave , Stockton <br /> 2401 Stanwell Dr, Ste 300 Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Jarrel Crider QC Sample Group 7091413-420 Reported Oct 8, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,1-Dichloro- Tr:chloro- Chloro- <br /> ethene ethene benzene <br /> Method EPA 8010 EPA 8010 EPA 8010 <br /> Analyst K Nill K Nill K Nill <br /> MS/MSD <br /> Batch# 7091418 7091418 7091418 <br /> Date Prepared 9125197 9125197 9125197 <br /> Date Analyzed 9/25197 9125197 9125197 <br /> Instrument I D # HP-7 HP-7 HP-7 <br /> COric Spiked 10 pg/L 10 p911- 10 pg/L <br /> Matrix Spike <br /> % Recovery 120 120 94 <br /> • Matrix Spike <br /> Duplicate % <br /> Recovery 100 97 82 <br /> Relative % <br /> Difference 19 21 14 <br /> LCS Batch# 7LCS092597 7LCS092597 7LCS092597 <br /> Date Prepared 9125197 9125197 9125/97 <br /> Date Analyzed 9125/97 9125197 9125197 <br /> Instrument I D # HP-7 HP-7 HP-7 <br /> LCS % <br /> Recovery 130 130 96 <br /> Recovery <br /> Control Limits 65-135 70-130 70-130 <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 /> .gnature an 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 recove is to be used to validate the batch <br /> Project Manager <br /> 7091413 MPD <10> <br />