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Sequoia 680 Chesapeake Drive Redwood Crry CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 111 ,IO Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> s <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 Beryllium Cadmium Chromium Nickel <br /> QC Batch#. ME122697601OMDE ME122697601OMDE ME122697601OMDE ME122697601OMDE <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst T Sears T Sears T Sears T Sears <br /> MS/MSD # 9712E3901 9712E3901 9712E3901 9712E3901 <br /> Sample Cone N D N D 360 390 <br /> Prepared Date 12/26/97 12/26/97 12/26/97 12/26/97 <br /> Analyzed Date 12/26/97 12/26/97 12/26/97 12/26/97 <br /> Instrument LD # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 49 47 480 490 <br /> MS %Recovery 98 94 240 200 <br /> Dup Result 48 46 400 420 <br /> MSD% Recov. 96 92 80 60 <br /> RPD 21 22 18 15 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # BLK122697 BLK122697 BLK122697 BLK122697 <br /> Prepared Date 12/26/97 12/26/97 12/26/97 12/26/97 <br /> Analyzed Date 12/26/97 12/26/97 12/26/97 12/26/97 <br /> Instrument LD# MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked. 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result 5o 47 50 49 <br /> LCS% Recov.. 100 94 100 98 <br /> 80-120 80.120 80-120 80-120 <br /> LCS 80-120 80-120 80-120 80-120 <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 /> Tod Granicher interference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9712E29 PPP <6> <br />