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Sequoia <br />1a) <br />`/ 680 Chesapeake Drive <br />Redwood City, CA 940 <br />(415) 364-9600 <br />FAX (415) 364-9233 <br />milip Analytical <br />404 N. Wiget Lane <br />819 Striker Avenue, Suite 8 <br />Walnut Creek, CA 94598 <br />Sacramento, CA 95834 <br />(510) 988-9600 <br />(916) 921-9600 <br />FAX (510) 988-9673 <br />FAX <br />QC Batch#: ME100996601OMDE <br />0.70 <br />ME100996601OMDE <br />ME100996601OMDE <br />(916) 921-0100 <br />tnvlros Uhent Hro)ect IU: Shell 3011 Benjamin Holt Dr. <br />270 Perkins Ave. Matrix: Solid <br />Sonoma, CA 95476 <br />Attention: Joe Neely Work Order #: 9610568-01-13 Reported: Oct 10, 1996 <br />QUALITY CONTROL DATA REPORT <br />Analyte: <br />Beryllium <br />Cadmium <br />Chromium <br />Nickel <br />MS/MSD #: <br />EPA 200.7 <br />EPA 200.7 <br />EPA 200.7 <br />EPA 200.7 <br />QC Batch#: ME100996601OMDE <br />0.70 <br />ME100996601OMDE <br />ME100996601OMDE <br />ME100996601OMDE <br />Analy. Method: <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />Prep. Method: <br />EPA 3050 <br />EPA 3050 <br />EPA 3050 <br />EPA 3050 <br />Analyst: <br />C. Medefesser <br />C. Medefesser <br />C. Medefesser <br />C. Medefesser <br />MS/MSD #: <br />961049601 <br />961049601 <br />961049601 <br />961049601 <br />Sample Conc.: <br />0.70 <br />N.D. <br />69 <br />71 <br />Prepared Date: <br />10/9/96 <br />10/9/96 <br />10/9/96 <br />10/9/96 <br />Analyzed Date: <br />10/10/96 <br />10/10/96 <br />10/10/96 <br />10/10/96 <br />Instrument l.D.#: <br />MTJA2 <br />MTJA2 <br />MTJA2 <br />MTJA2 <br />Conc. Spiked: <br />100 mg/Kg <br />100 mg/Kg <br />100 mg/Kg <br />100 mg/Kg <br />Result: <br />100 <br />97 <br />160 <br />160 <br />MS % Recovery: <br />99 <br />97 <br />91 <br />89 <br />Dup. Result: <br />100 <br />100 <br />170 <br />170 <br />MSD % Recov.: <br />99 <br />100 <br />101 <br />99 <br />RPD: <br />0.0 <br />3.0 <br />6.1 <br />6.1 <br />RPD Limit: <br />0.20 <br />0-20 <br />0-20 <br />0-20 <br />LCS #: <br />BLK100996 <br />BLK100996 <br />BLK100996 <br />BLK100996 <br />Prepared Date: <br />10/9/96 <br />10/9/96 <br />10/9/96 <br />10/9/96 <br />Analyzed Date: <br />10/10/96 <br />10/10/96 <br />10/10/96 <br />10/10/96 <br />Instrumentl.D.#: <br />MTJA2 <br />MTJA2 <br />MTJA2 <br />MTJA2 <br />Cone. Spiked: <br />100 mg/Kg <br />100 mg/Kg <br />100 mg/Kg <br />100 mg/Kg <br />LCS Result: <br />100 <br />100 <br />100 <br />100 <br />LCS /o Recov.: <br />100 <br />100 <br />100 <br />100 <br />MS/MSD <br />LCS 75-125 75-125 75-125 75-125 <br />Control Limits <br />SEQUOIA,ANALYTICAL <br />I regory <br />Project Manager <br />The LCS is a control sample of known, interferent -free matrix that is analyzed using the same reagents, <br />�paration, and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br />tified with known quantities of specific compounds and subjected to the entire analytical procedure. If <br />recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br />arference, the LCS recovery is to be used to validate the batch. <br />" MS= Matrix Spike, MSD=MS Duplicate, RPD=Relative %Difference 9610566.EEE <2> <br />