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SEQUOIA AN <br /> � ALYTIGAL <br /> 1900 Bates Avenue a Suite LM • Concord,California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> , .,.rC,£„tw'a�..wvswva,:,.�,x. knnA.w,:� CwAr,r} <br /> ux Associates nrr `C,`Ilent Project fD W Arco <br /> 1855 Gateway Blvd , Ste 770 Matrix Liquid <br /> :f <br /> Concord, CA 94520 <br /> Attention Paul Supple QC Sample Group 309-1356 Reported Oct 6, 1993 <br /> —WW^^ ., xnr <br /> QUALITY CONTROL DATA REPORT <br /> AMTE $TLC <br /> Lead <br /> Method. EPA 7421 <br />' Analyst. D Ballard <br /> Conc.Spiked: 10 <br /> Units: mg/L <br />' LCS Batch#: BLK100293 <br />' Date Prepared. 10/2/93 <br /> Date Analyzed: 10/4/93 <br /> Instrument I.D.# SpectrAA-400 <br /> LCS % <br /> Recovery: 78 <br /> ` Control Limits' 75-125 n <br /> N� ��}s}rA}trh^ri}'�}}nr5{ r.yrlrrr, � r rr ; r}S�r',r r rf` r,� wvrnSt,n`rr i�wJy N{+r`vr{}v%ryr ,.{n}Gvr r rr^r ^ iC4� r{r�A v,4+r„h r G• rnv, <br /> /� r4r4rr <br /> JA+}wAt}k�}Q F+v4 i+nr3 vn W.vrv}nk+Gvw n•v nn v„nrn v,+nnr^n{ ,� }iY „ p� r- y{i4,4r,.v ni..jii�rri`r..: nr�, , xr , �..r n, i4�i x4v.�.lwv ,rnr ,v v,+nv r ,}r } , <br /> MS/MSD <br /> Batch #: BLK100293 <br />' Date Prepared 10/2/93 <br /> Date Analyzed: 10/4/93 <br /> Instrument I.D.#' SpectrAA-400 <br /> ' Matrix Spike <br /> %Recovery: 78 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 74 <br /> ' Relative% <br /> Difference: 53 <br /> SEQUOIA AN LYTIC lease Note <br /> The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> pmpar ical methods employed for the samples The LCS%recovery data Is used for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results <br /> Kenneth KF Lee <br /> Laboratory Director <br /> 3091356 ROU <4> <br />