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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> } �a+"7 e""r�ahzx��mws>vs"rww{� °iYo-3`r 4 { n: S�ou � fMEo-v, x2c"s�i ncn ir5n a wu2aoo�w wk �btir]Ytitc4Yw^ ti <br /> otos Associates Ciiert 'ro ext YD. Arco Bibb%Stockton <br /> 1855 Gateway Blvd , Ste 770 Matrix Liquid < <br /> e}Concord, CA 94520 <br /> Attention Paul Supple _ OC Sample Group 310-0274 Reported Oct 12, 1993, <br /> '?O��ni�x�vxtiti x nM v .v rx�1 x r x rx rx� x.{}vw kvSrQ ti�4�4 tiv w.xr+++Tvrn }x tixn rrynr rn i 6:`` "•:vv ry +n. rFW rr i^n}�}{Y 'tti�vl�y�r�»♦vuvr{.v�{}ti Y yY�wrtivr <br /> v vx4�v}qQ�v tiwhrxr x ry.x�W.vir�.J gwtvv n vxr .. v} v r <br /> QUALITY CONTROL DATA REPORT <br /> ARTME STLC <br />' Lead <br />' Method: EPA 7421 <br /> Analyst. K Anderson <br /> Conic. Spiked. 10 <br /> Units: mg/L <br />' LCS Batch#' SLK10080 <br /> Date Prepared. 10/8/93 <br /> Date Analyzed: 10/11/93 <br /> Instrument i.D.#: spectrAA-400 <br /> LCS % <br /> 10 Recovery: 92 <br /> Control Limits: 75-125 <br /> iA ti r"MC wi *MvrwYO F <br /> o-{ tr;P`•r <br /> MS/MSD <br /> Batch#: 3100274 <br />' Date Prepared: 10/8/93 <br /> Date Analyzed: 10/11/93 <br /> Instrument I.D.#: spectrm-400 <br />' Instr. Spike <br /> %Recovery: 101 <br />' Instr. Spike <br /> Duplicate% <br /> Recovery 98 <br /> Relative% <br /> Difference: 30 <br /> SEQUOIA ANALYTICAL ease 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 /> val <br /> i a on 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 />' 3100274 ROU <4> <br />