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Sequoia 680 Chesapeake Dave Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 41� 404 N Wiget lane Walnut Creek,CA 94598 (510) 988-9600 FAX k510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Pacific Environmental Group Client Project ID 920-119 1A/9-6171, Stockton <br /> 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention Tim Anensen Work Order# 9712E29 01-07 Reported Jan 12, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Trichloro- Chloro- <br /> ethane ethane Benzene <br /> OC Batch#' GC122697801000A GC122697801000A GC122697801000A <br /> Analy. Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst- <br /> IVIS/MSD# <br /> Sample Conc <br /> Prepared Date <br /> Analyzed Date. <br /> Instrument LD #- <br /> Conc. Spiked <br /> Result <br /> MS % Recovery <br /> Dup Result <br /> MSD %Recov.. <br /> RPD <br /> RPD Limit <br /> LCS# BLK122697 BLK122697 BLK122697 <br /> Prepared Date 123/26/97 123/26/97 123/26/97 <br /> Analyzed Date 12/28/97 12/28/97 12/28/97 <br /> Instrument I.D.#. GCHP9 GCHP9 GCHP9 <br /> Conc. Spiked 50 ug/Kg 50pg/Kg 50pg/Kg <br /> LCS Result. 34 39 35 <br /> LCS % Recov.. 68 78 70 <br /> 60-140 60-140 60-140 <br /> LCS 65-135 70-130 70-130 <br /> Control Limits <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 is 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 to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Tod Granicher **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager 9712E29 PPP <4, <br />