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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N wi$et Lane Walnut Creek,CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAx(916)921-0100 <br /> 1455 McDoweil t31vd North Ste D Petaluma CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> Cambria Environmental Tech Client Project ID' Shell 420'West Kettleman Lane n <br /> 270 Perkins Ave Matrix Solid <br /> Sonoma CA 95478 <br /> Attention Mike Murphy Work Order # 9903A47 09, 10 Reported Mar 31,- 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME0324996010MDA ME03249-0601OMDA ME0324996010MDA ME0324996010MOA <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method. EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst. M vu M vu M vu M vu <br /> MS/MSD # 9903A4709 9903A4709 9903A4709 9903A4709 <br /> Sample Conc N D N D 91 71 <br /> Prepared Date 3/24/99 3/24/99 3/24/99 3/24/99 <br /> Analyzed Date 3/24/99 3/24/99 3/24/99 3/24/99 <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 44 55 52 <br /> S % Recovery 88 88 92 89 <br /> Dup Result: 44 45 55 52 <br /> MSD % Recov as 90 92 89 <br /> RPD 00 22 00 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCB # BLK032499 BLK032499 BLK032499 BLK032499 <br /> Prepared Date 3/24/99 3/24/99 3/24/99 3/24/99 <br /> Analyzed Date 3/24/99 3/24/99 3/24/99 3/24/99 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc. Spiked 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result 48 47 50 49 <br /> LCS % Recov 96 94 100 98 <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 /> IR\\\ EQUOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> I \ 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 fail within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Ka n Kim i <br /> Project Manager Y*MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative q Difference 9903A47 CCC <1> <br />