Laserfiche WebLink
l <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> ux ASsOCIates Clieht Project ID ARCO #2180-93-ll /Stockton <br /> 855 Gateway Blvd , Ste 770 Matrix STLC Extract of Sod <br /> Concord, CA 94520 <br /> } Attention Paul Supple OC Sample Group 311-0370 Reported Nov 9, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE STLC <br />' Lead <br /> Method EPA 7420 <br />' Analyst K Anderson <br /> Cone. Spiked 10 <br /> Units. mg/L <br />' LCS Batch# BLK110593 <br /> Date Prepared 11/5/93 <br /> Date Analyzed- 11/9/93 <br /> Instrument I.D.#: SpeetrAA 20 <br /> LCS y <br /> Recovery 104 <br /> Control Limits: 75-125 <br />' MS/MSD <br /> Batch#: 3101500 <br /> Date Prepared• 11/5/93 <br /> Date Analyzed 11/9/93 <br /> instrument I D # SpectrAA-20 <br />' Matrix Spike <br /> % Recovery: 81 <br /> Matrix Spike <br />' Duplicate% <br /> Recovery 70 <br /> Relative% <br /> Difference 1s <br /> SEQUOIA AN YTICAL Please Nate <br /> The LCS is a control sample of known,interferent free matnx 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 /> and are not used to accept or refect batch results <br /> Kenneth K F Lee <br /> Laboratory Director <br />' 3110370 ROU <4> <br />