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Sequoia 680 Chesapeake Drive Redwood Ciry,CA 94063 (415) 364 9600 FAX (415) 364-9233 <br /> 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686 9600 FAX(510) 686 9689 <br /> Analytical <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> FRESNA Client Project ID 150077 01, Holt Brothers <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention John Lane QC Sample Group 4F33801-3 Reported Jun 22, 1994 <br /> k +• <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,1-Dichloro- Trichloro- Chloro- <br /> ethene ethene benzene <br /> Method: EPA 8010 EPA 8010 EPA 8010 <br /> Analyst H Porter H Porter H Porter <br /> MS/MSD <br /> Batch#. 4F10001 4F10001 4F10001 <br /> Date Prepared* 6/9/94 6/9/94 6/9/94 <br /> Date Analyzed- 6/9/94 6/9/94 6/9/94 <br /> Instrument I D #: GCHP-15 GCHP-15 GCHP-15 <br /> Conc Spiked: 25ug/L 25Ng/L 25ug/L <br /> Matrix Spike <br /> % Recovery. 112 104 104 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery, 112 108 112 <br /> Relative% <br /> Difference. 00 3 8 74 <br /> LCS Batch# - - - <br /> Date Prepared: - - <br /> Date Analyzed. - - - <br /> Instrument LD #: - - - <br /> LCS % <br /> Recovery- - <br /> 011 <br /> Recovery <br /> Control Limits 28-167 35-146 38-150 <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 preparation,and analytical methods employed for the samples The matrix spike rs 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 io matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager 4F33801 WAT <7> <br />