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Sequoia 680 Chesapeake Drive s Rcdwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Wainut 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 /> Pacific Environmental Group Client Project ID 311-174 1A/BP 5447, Stockton <br />' 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention Jessica Nelligan Work Order # 9802209 01, 02 Reported Feb 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br />' Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME0205986010MDF ME0205986010MDF ME020598601OMDF ME020598601OMDF <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br />' Prep Method EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst S Lebaron S Lebaron S Lebaron S Lebaron <br />' MS/MSD # 980221101 980221101 980221101 980221101 <br /> Sample Cone N D ND 34 29 <br /> Prepared Date 2/6/98 2/6/98 2/6/98 2/6/98 <br /> Analyzed Date 2/6/98 2/6/98 2/6/98 2/6/98 <br /> Instrument 1 D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 44 45 99 90 <br /> MS % Recovery 88 90 - <br /> Dup Result 50 51 120 100 <br /> MSD % Recov 100 102 _ <br /> RPD 13 13 19 11 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> 1 <br />' LCS # BLK020598 BLK020598 BLK020598 BLK020598 <br /> Prepared Date 2/5/98 2/5/98 2/5/98 2/5/98 <br /> Analyzed Date 2/6/98 2/6/98 2/6/98 2/6/98 <br />' Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result 54 53 54 54 <br /> LCS % Recov 108 106 108 108 <br /> 80120 60-120 80-120 80-120 <br /> LCS 80-120 80-120 80-120 80-120 <br /> Control Limits <br /> fPlease 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 9602209 PPP <4> <br />