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Sequoia 680 Chesapeake Drive Redwood City 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 /> Analytical 819 Striker Avenue State 8 Sacramento CA 95834 (916) 92t 9600 FAX (916)921 0100 <br /> Pacific Environmental Group Client Project ID 311-1741A/5447, Stockton <br />' 2025 Gateway Place, Suite 440 Matrix Solid <br /> San Jose, CA 95110 <br /> Attention Jessica Nelligan Work Order # 9802F69 01-03 Reported Mar 6, 1998 <br /> 1# <br />' QUALITY CONTROL DATA REPORT <br />' Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME022698601OMDE ME0226986010MOE ME022698601OMDE ME022698601OMDE <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# 980267701 980267701 980267701 980267701 <br /> Sample Cone N D N D 82 130 <br /> Prepared Date 2/26/98 2/26/98 2/26/98 2/26/98 <br /> Analyzed Date 2/25/98 2/26/98 2/26/98 2/P6/98 <br />' Instrument i D # MTJAS MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 44 45 140 170 <br /> MS % Recovery 88 90 116 8o <br /> Dup Result 44 47 130 160 <br />' MSD % Recov 88 94 95 60 <br /> RPD 00 43 74 87 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> r <br /> LCS # BLK022698 BLK022698 BLK022698 BLK022698 <br /> Prepared Date 2/26/98 2/26/98 2/26/98 2/26/98 <br /> Analyzed Date 2/26/98 2/26/98 2/26/98 2/26/98 <br /> Instrument I ❑ # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result 53 51 53 52 <br /> LCS % Recov 106 102 106 104 <br /> 80-120 80-120 80.120 80-120 <br /> LCS 80-120 80-120 80-120 80-120 <br /> Control Limits <br /> IPlease Note <br /> The LCS is a control sample of known,interferent free matrix that 1s analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 1s to be used to validate the batch <br /> Tod Granicher <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Differenoe 9802F69 PPP <3> <br />