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t \ 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 /> •�`/ Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Enviros n Client Project ID n Shell 1267 Country Club, Stick <br /> 270 Perkins Ave Matrix Solid <br /> Sonoma, CA 95476 <br /> Attention Joe Neely Work Order# 9704512 04, 05 Reported Apr 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME041197601OMDE ME041197601OMDE ME041197601OMDE ME041197601OMDE <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method. EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst' R Butler R Butler R Butler R Butler <br /> MS/MSD# 970429802 970429802 970429802 970429802 <br /> Sample Cone.: N D N D 63 68 <br /> Prepared Date 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Analyzed Date 4/14/97 4/14/97 4/14/97 4/14/97 <br /> Instrument I.D #: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Cone Spiked 100 mg/Kg 100 mg/Kg 100 mg/Kg 100 mg/Kg <br /> Result, 90 89 140 140 <br /> MS % Recovery, 90 89 77 72 <br /> Dup. Result: 90 89 150 150 <br /> MSD % Recov 90 89 87 82 <br /> RPD 00 00 69 69 <br /> RPD Limit 0-20 0-20 0.20 0-20 <br /> i <br /> LCS # BLK041197BS BLK0411978S BLK041197BS BLK041197BS <br /> Prepared Date 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Analyzed Date 4/14/97 4/14/97 4/14/97 4/14/97 <br /> Instrument 1 D #: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Cone Spiked 100 mg/Kg 100 mg/Kg 100 mg/Kg 100 mg/Kg <br /> LCS Result* 100 100 100 100 <br /> LCS °.% Recov 100 100 too 100 <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 ALYTICAL 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 /> I Gregory <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9704512 EEE <4> <br />