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r { Sequoia 680 Chesapeake Drive Redwood City,CA 9401 (415) 364-96(r FAX(415j 364-9233 <br /> �I 404 IV,Wiget Lane Walnut Creek,CA 9459,.,/ (510) 988-9600 FAX(510)988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento.CA 95834 (9t6) 921.9600 FAX(916)921-0100 <br /> Client Project D:touchstoneo meets <br /> 9- <br /> •� <br /> 1452, CFevron9- <br /> 1452 <br /> <5807 Balboa Drive Matrix: Solid <br /> Oakland, CA 94611 <br /> :Attention: Robert Mallory Work Order#: 9509-100 -01-06, 09-18 Reported: >{ <br /> :..:.::.::::;.;.: - Oct fi 1995.., <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Beryllium Cadmium Chromium <br /> Nickel <br /> QC Batch#: ME100495W10MDF ME1004956010MDF ME100495601OMDF ME1004956010MOF <br /> Analy. Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep. Method: EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst: C.Medefesser C. Medefesser C. Medefesser C.Medefesser <br /> MS/MSD#: 950910001 950910001 950910001 950910001 <br /> Sample Conc.: 0.57 N.D. 13 13 <br /> Prepared Date: 10/4/95 10/4/95 10/4/95 10/4/95 <br /> Analyzed Date: 10/5/95 10/5/95 10/5/95 10/5/95 <br /> Instrument I.D.#: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc. Spiked: 100 mg/Kg 100 mg/Kg 100 mg/Kg 100 mg/Kg <br /> Result: 100 97 110 110 <br /> MS%Recovery: 99 97 97 97 <br /> Dup. Result: 100 98 110 110 <br /> MSD %Recov.: 99 98 97 97 <br /> RPD: 0.0 1.0 0.0 0.0 <br /> RPD Limit: 0.30 0-30 0-30 0-30 <br /> xl <br /> LCS#: BLK100495 BLK100495 BLK100495 BLK100495 <br /> Prepared Date: 10/4/95 10/4/95 10/4/95 10/4/95 <br /> Analyzed Date: 10/5/95 10/5/95 10/5/95 10/5/95 <br /> Instrument I.D.#: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc. Spiked: 100 mg/Kg 100 mg/Kg 100 mg/Kg 100 mg/Kg <br /> LCS Result: 110 100 100 100 <br /> LCS % Recov.: 110 100 100 100 <br /> MS/MSD <br /> LCS 75-125 75-125 75-125 75-125 <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 /> S UOIA 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 /> i� 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 /> Mark J. Cargasacchi <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9509-100.TTT <1> <br />