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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> - r l• rte} Irr + AJ`r r,.r{ry`H rrr• r •�mn rFf l+ // Ir rryy+ry; r }r yr r+� + r Lir nr•n... r % Jfl lI�1J1�HIr rvvr rrw rwr r } <br /> 1WgroWest, Inc rl:lient Project TD Shell, #41VN`Ej Dorado, Stockton, CA <br /> 50 Melody Lane, Ste 160 Matrix Water <br /> Roseville, CA 95678 <br /> Attention Paul Graff CC Sample Goup 404-0118 Reported Apr 18, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 14-Dichloro- N-Nitroso-Di- 12,4-Trichloro- 4-Chloro-3- <br /> Phenol 2 Chlorophenol benzene N-oropyiamine benzene Methhen <br /> Method. EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 <br /> Analyst E Manuel S Le S Le S Le S Le S Le <br /> Concentration <br /> Spiked 100 ug/L 100 ug/L 50 ug/L 50 ug/L 50 ug/L 100 ug/L <br /> LCS Batch# N/A N/A N/A N/A N/A N/A <br /> Date Prepared. N/A N/A N/A N/A N/A N/A <br /> Date Analyzed N/A N/A N/A N/A N/A N/A <br /> Instrument I D.# N/A N/A N/A NIA N/A N/A <br /> LCS % <br /> Recovery N/A N/A N/A N/A N/A N/A <br />*Control Limits 5-112 23-134 20-124 DL-230 44-142 22-147 <br /> MS/MSD <br /> Batch # BLK040594 BLK040594 BLK040594 ELK040594 BLK040594 BLK040594 <br /> Date Prepared' 4/5/94 4/5/94 4/5/94 4/5/94 4/5/94 4/5/94 <br /> Date Analyzed 4/7/94 4/7/94 4/7/94 4/7/94 4/7/94 4/7/94 <br /> Instrument I D.# N/A N/A N/A N/A N/A N/A <br /> Matnx Spike <br /> %Recovery 81 81 78 82 84 82 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 81 81 78 78 84 81 <br /> Relative % <br /> Difference: 00 00 00 50 00 1 2 <br /> Please Note <br /> SEQUOIA ANALYTICAL 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 /> , f / validation of sample batch results Due to matnx effects the QC limrts for MS/MSD's are advisory only <br /> r C <br /> and are not used to accent or reject batch results <br /> Linda C Schneider <br /> Project Manager Page 1 of 2 <br /> 4040118 FUG <9> <br />