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680 Chesapeake Drive Redwood City, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> IT) Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> fwll� Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (9t6) 921 9600 FAX (916)921 0100 <br /> . r <br /> Cambria Client Project ID Shell 2575 Country Club Blvd <br /> 270 Perkins Avenue Matrix Solid <br /> Sonoma, CA 95476 <br /> Attention Joe Neely Work Order# 9712705-05 Reported Dec 31, 1997 ti <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Beryllium Cadmium Chromium Nickel <br /> QC Batch#. ME121297601OMDE ME121297601OMDE ME121297601OMDE ME121297601OMDE <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# 971256009 971266009 971266009 971266009 <br /> Sample Conc. N D N D 11 42 <br /> Prepared Date. 12/12/97 12/12/97 12/12/97 12/12/97 <br /> Analyzed Date: 12/12/97 12/12/97 12/12/97 12/12/97 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 44 45 55 81 <br />�MS % Recovery 88 90 88 78 <br /> Dup Result 44 44 53 76 <br /> MSD % Recov. 88 88 84 68 <br /> RPD: 00 22 37 64 <br /> RPD Limit: 0-20 0-20 0-20 0-20 <br /> LCS #' BLK121297 BLK121297 BLK121297 BLK121297 <br /> Prepared Date 12/12/97 12/12/97 12/12/97 12/12/97 <br /> Analyzed Date: 12/12/97 12/12/97 12/12/97 12/12/97 <br /> Instrument l D #. MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result: 49 49 50 50 <br /> LCS % Recov.• 98 98 100 100 <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 /> OWEQUOIA YTICAL 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 N <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 /> oryanager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9712705 CCC <2> <br />