Laserfiche WebLink
SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> wall (916) 921-9600 • FAX (916) 921-0100 <br /> egis Environmental Consultants Client Project ID Shell, 141 N EI Dorado, Stockton <br /> 1050 Melody Lane, Ste 150 Matrix Air <br /> Roseville, CA 95678 <br /> Attention Paul Graff CC Sample Group 311-0276 Reported Nov 11, 1993 <br /> 'QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst M C M C M C M C <br /> Concentration 2 0 mg/ 2 0 mg/ 2 0 mg/ 6 0 mg/ <br /> Spiked- cubic m cubic m cubic m cubic m <br /> LCS Batch# BLK110593MS BLK110593MS BLK110593MS BLK110593MS <br /> Date Prepared: 11/5/93 11/5/93 11/5/93 11/5/93 <br /> Date Analyzed 11/5/93 11/5/93 11/5/93 11/5/93 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 <br /> LCS % <br /> Ob Recovery 100 95 100 98 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch # BLK110593 BLK110593 BLK110593 BLK110593 <br /> Date Prepared 11/5/93 11/5/93 11/5/93 11/5/93 <br /> Date Analyzed 11/5/93 11/5/93 11/5/93 11/5/93 <br /> Instrument I D.# HP 2 HP-2 HP-2 HP-2 <br /> Matrix Spike <br /> % Recovery 100 95 100 98 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 105 100 105 103 <br /> Relative% <br /> Difference: 49 51 49 50 <br /> SEQUOIA <br /> 0 <br /> SEQUOIA ANALYTICAL Please(vote <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br />/ Linda C Schneider and are not used to accept or refect batch results <br /> Project Manager <br /> 3110276 AEC <3> <br />