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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> :.4....14::.4:.....:.:.. .:..r:.4.w.4:..v:,�}{:' .. `: .. ..:-. .. ..} ... :....::.::... ..::•. r JN" <br /> tr....................: r........:...r.......................v...tir....::.:..:.:_..R.....::......C..::.:r..:..4.vrv...v...::r.mrv..:.v.,.n, ..:.:.vrv.:rv.rvn:r.nr.r...r. .t-.::.:.::.:..;�..:r::C:..:..�:....r.: .:..:..rn......tr:rv........:rv:F.r..... <br /> <MESNA Client Project ID: OW0365.02 Stockton Smith Canal __ <br /> ><1710 Main Street Matrbc: Water <br /> i=Escalon, CA 95320 <br /> >Attention: John Lane OC Sample Group: 31-30001, D2,04 Reported <br /> ?:::::.:.r:::.4.s..::...........:....,,... <br /> ::�:•::{:4:4::.4 <br /> Dec 16, 1993x;= <br /> .; r ........4....v...:.4v:.ra - •:�:x'- <br /> ..:... ......n r.'Jx;:=::fi:.:.2�o ............ ......... <br /> ...................:............. ..rv.r:,.,.r:.::.. ....}:..............:::::i:.........................................:...:.....c.4:.-.,..,...„:.:.:...:.,::...:.,vr. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: M.Nipp M.Nipp M.Nipp M.Nipp <br /> MS/MSD <br /> Batch#: 3L10804 31-10804 31-10804 31-10804 <br /> Date Prepared: - - - <br /> Date Analyzed: 12/8/93 12/8/93 12/8/93 12/8/93 <br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3 GCHP-3 <br /> Conc. Spiked: 10pg/L 10,ug/L 10pg/L 30pg/L <br /> Matrix Spike <br /> %Recovery: 100 100 100 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 95 95 96 97 <br /> Relative% <br /> Difference: 5.1 5.1 4.1 3.4 <br /> .tr..: ..{._:_.:.....{. 4 .....- ry ....r...;.._..:..r.r.::..:..:::.:.:..}.r.._.4r:.U.....'::}.:1+}: •:h:...�.::::r- :4C::.G{4:}'::Y{:i+{'J- <br /> ....:}::..::........:.:...::............. r.v::r.•'r...rv.rcr.r::::r.:v.,....,.........�.__r-n:r..r..:....?...,�::r::::::::...:.:.:::?i.......................................:.....�..?::.:.::.:?:::'”.�.h.......v.....}:..4.:..J:r.::U:Jr.J:U:v}:i:vn:r:,.i0}.i. <br /> LCS Batch#: - - - - <br /> Date Prepared: - - - - <br /> Date Analyzed: - - - <br /> Instrument I.D.#: - <br /> LCS % <br /> Recovery: - - - - <br /> % Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> -.,SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. If <br /> j1 the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> �-L interference,the LCS recovery is to be used to validate the batch. <br /> Vickie Tagu <br /> Project Manager 3L30001.WAT <4> <br />