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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento CA 95834 <br /> (916) 921 9600 • FAX (916) 921 0100 <br /> Aegis Environmental Consultants Client Project ID Shell, 141 N EI Dorado, Stockton <br /> 1050 Melody Lane, Ste 160 Matrix Water <br /> Roseville, CA 95678 <br /> Attention Paul Graff CC Sample Group 3110198-200 Reported Nov 18 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ac:enapntnene 4-Nitrounenoi 2 4-0initro- Renta- Pyrene <br /> •oluene chlorophenol <br /> Methoa: EaA 625 EPA 625 PA 625 EPA 625 EPA 625 <br /> Analyst: E Manuel E Manusi = Manuel E Manuel E Manuel <br /> MS/MSD <br /> Batch#- 931137901 931137901 X31 1 37901 931137901 931137901 <br /> Date Prepared: 1 9/93 11/9/93 9/93 11/9/93 11/9/93 <br /> Date Analyzed: 1 /12/93 11/12/93 1/'2;93 11/12/93 11/12/93 <br /> Instrument I D # =4 F4 =a F4 F4 <br /> Conc. Splkea 50 ng 100 ng 100 ng 50 ng <br /> Matrix Spike <br /> % Recovery :z 5 - 74 54 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery -�6 -2 78 70 <br /> Relative % <br /> Difference 3 .11 53 90 <br /> L.CS Batch#• - <br /> Hate Prepared <br /> Date Analyzed <br /> Instrument I D # <br /> LCS % <br /> Recovery <br /> Recovery <br /> Control Limits: 47 .47 CL 132 9-139 14-176 52 115 I <br /> Please Note <br /> The LCS is a control sample of known Interferent free matnx that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specinc cempounas and subjected to the entire analytical proceaure if <br /> the recovery of anaivtes trom the matrix spike does not fall within specified control limits due to matrix <br /> interterence the t-CS recovery is to be usea to validate the batch <br /> Linda C Schneider <br /> Prolect Manager 3110198 AEG <16> <br />