Laserfiche WebLink
j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> O�s`sociates Client Protect lD Arco #2093-93-1, Tracy' h <br /> 1855 Gateway Blvd , Ste 770 Matrix Extract of Soil <br /> Concord, CA 94520 <br /> Attention Paul S-=Ie OC Sample Group 308-0120 Reported Aug 17, 1993 <br /> v Y r v S { r <br /> QUALITY CONTROL DATA REPORT <br /> ANAL STLC <br /> Lead <br /> Method EPA 7421 <br /> Analyst K v S <br /> ' Conc Spiked 10 <br /> Units mg/L <br /> ' LCS Batch# BLK081093 <br /> Date Prepared 8/10/93 <br /> Date Analyzed 8/12/93 <br /> instrument I D # SpectrAA-400 <br /> LCS °.6 <br /> Recovery 82 <br /> Control Limits- 75-125 <br /> MS/MSD <br /> ' Batch # 3071131 <br /> Date Prepared 8/10/93 <br /> Date Analyzed 8/12/93 <br /> ,nstrument I D # SpectrAA-400 <br /> Matrix Spike <br /> ' % Recovery 112 <br /> Matrix Spike <br /> Duplicate % <br /> ' Recovery. 102 <br /> Relative % <br /> ' Difference 93 <br /> &EEGUOIA AN YTICAL Please Note <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 /> enneth K F Lee and are not used to accept or reject batch results <br /> Laboratory Director <br /> ' #3080120 ROU <2> <br />