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SEQUOIA ANALYTICAL <br /> Chesapeake680 Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> f n ` r ~v ~ n v + v♦r.� v+Y 4� v vv v r 1 ~ n ^`f.~ <br /> RESNAry hvvv` nr Client Project ID� W0402 00,~Holt Bros x <br /> 21710 Main Street Matrix Water <br /> Escalon, CA 95320 <br /> ~Attention John Lane OC Sample Group 31E9601 Reported Oct 13, 1993 <br /> f~ v r~v+-�} ♦ v.v r.. v v r v. •� • ,S~ r v r A ~ � n ]♦ a 1 ~r +r♦ ~yr Y� r n �rryr~..w yfry �it L �xs r kvt..A <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene X enes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst M Nipp M Nipp M Nipp M Nipp <br /> Conc.Spiked 10 10 10 30 <br /> Units. Ng/L ug/L 119/L erg/L <br /> LCS Batch#: BLK100593 BLK100593 BLK100593 BLK100593 <br /> Date Prepared. <br /> Date Analyzed, 10/5/93 10/5/93 10/5/93 10/5/93 <br /> instrument I D #. GCHP3 GCHP3 GCHP-3 GCHP3 <br /> LCS % <br /> Recovery: 93 92 92 90 <br /> Control Limits: 80.120 80-120 80-120 80-120 <br /> } w n} ry <br /> I- � Au t nv try - N ~ ,'.,' t ,]m..s , ry ,.rr r .~ ,. ;,V `.' <br /> n+�+]~t~ •• mvww t{�:.1CYS ` Fmrm~t v.r. ~ v r ♦tvr } imry M.�}4 r ..vv v r ten.~r n+"nwSn• rm n.}`r{~ <br /> MS/MSD <br /> Batch #: 3JO2804 3JO2804 3J02804 3JO2804 <br /> Date Prepared - - - - <br /> Date Analyzed 10/5/93 10/5/93 10/5/93 10/5/93 <br /> Instrument I D #: GCHP3 GCHP-3 GCHP-3 GCHP3 <br /> Matrix Spike <br /> %Recovery: 94 93 95 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 97 97 99 100 <br /> Relative% <br /> Difference 31 4 2 41 73 <br /> .SEQUOIA ANALYTICAL 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 /> �Ilvllnc �fvalidation of sample batch results Due to matrix effects,the CC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results <br /> Vickie Tague <br /> Project Manager 31E9601 WAT <6> <br />