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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 404 N.W'iget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0100 yr .vr f... .. .....-r.r.........r...... .:..r. r n rr..... .......:::�.:...4:, {..y._.... .v ux ...xmr..n......v n•.rnv ..,N•}iiiw ` mn Fi.06..x.rn......: .... .. .vv.� -:;K-n•:Ji:ii+:v}:-.:-a:-•:.>Y'•:'s:::r.Y.. ':�.':�.....:.;}`: .rmvry v•rni�-w}:nii,-rc:::`::�`}:v.}rAr v.:i..,,..;:}h....:.:::.'=-':..:::."}::.... )ekfa Lnvlronmental Consultants tient Project!D A�oion#7-3330 . • -` FX 3164 Gold Camp Dr., Suite 200 Matrix: Air lancho Cordova, CA 95670 Attention: C. Keonj Almeida QC Sample Group 5110919-0920 Reported: Nov 20, 1995 ::'i:w:4\\,}'!L'nG:.:54"I.tirrry:y,:v,:rr.Lr:w.�;.1::::•.va:: .::.}:}x::.;}..}w{::.v,...::=:?'�:Y-i?:G;{;•.yy}.:.}:}.�.y,:{n}}vv-.•��:;.?-r:rrr n?'gvi{4::n::N v...v{x.r•:i:..::-txtt.: n..4. Xiy.}:ifi:;r:::4:.:tri {;'�..y. .. .......:: Y..:•::•...•.?•.::^!.}:<i:��:i'�.... .:.r r--r:nr. J+- .....:..:.:....:}.....,�-:-:v:v::::v.-:..:,.�{:....:....:.:.;;.....:�:�.v.:rr[r:':...?:�rv'ry :ih:::...,v.:v:S..::k.;..:.4::.+.w'.w:..:.:...�:..U.::::.A4.:vv:}n:v.:v::i w.:.nva-:\::{.::v::.w::x::..::1.w:;r:.::•..:.:.:.,vw.-:.vi-nv.:v:-::..::..n,:n::::.:rr:..n:...W.r,.r\.:�w.xwn n.::...v....:._..�.:....�Kw:v.::T.v..:v.::.::....:.2.:.:::.v.nS:..vC.'v.:4`!*:f.:-0•}�i3�-::tti:+� QUALITY CONTROL DATA REPORT ANALYTE Ethyl- Benzene Toluene Benzene Xylenes Method: EPA 8020 BPA 8020 EPA 8020 EPA 8020 Analyst: B.Williams B.Williams B.Williams B.Williams Concentration Spiked: 2.0 mg/ma 2.0 mg/ma 2.0 mg/ma 6.0 mg/ma LCS Batch#: LCS111695 LCS111695 LCS111695 LCS111695 Date Prepared: 11/16/95 11/16/95 11/16/95 11/16/95 Date Analyzed: 11/16/95 11/16/95 11/16/95 11/16/95 nstrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 LCS % Recovery: 87 88 89 90 Control Limits: 75-125 75-125 75-125 75-125 . :n::•.v.:;:•:::.v:::::�tt::4,yiG:::{in.};:4}tywrv. w::.::.a. ......��...r.. Vn:•n•+:'�*"=}?".�v.;Y:::?;.;- i>A:4:4:?:.::• n:4:r4} YrY !.`:... .. ..i... .;.:�{.:4-r.v Vx.•.w.v::.::va,:w:;, .... - . .r. .. ....:ioi::..-v--;:....,:::r.�..::r�.:.:.}.:........... �-�� ..,��._:.. ,-::•.:.:••..:. ::,:44xi•:•:rn::.:,:,�r.• .:, :.i:iii:`�i<ii:?:�:�:i::i:..�:.::�:ti.`'::•�:{+c-:. ?{- :.:4.::i':::};::.�::...:v.v v.r i.Y�'� . .:: .::_ ::.•...x...........rr..n4Fi:::{.. ..v: n n..... ....:.........:..... ...n;n..:.. -5..:.:. �- .::-:.� w:rx•.vvf"r::•}vtyv:-ai: .-.;41:::A;.v1:A}i::+:':r': ....v..:.vn.:.v.t.....:.4._:4c:.s.:.:.....:....... rr:rnvrr:..rvv:.4...v.......n.nn.n m.wvr.r..:...�.r:�..:.. ..... :::.n.:. .... i:::is....: .. .. .. ... ... . MS/MSD Batch#: B8111695 BS111695 BS111695 85111695 Date Prepared: 11/16/95 11/16/95 11/16/95 11/16/95 Date Analyzed: 11/16/95 11/16/95 11/16/95 11/16/95 Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 Matrix Spike % Recovery: 80 80 80 82 Matrix Spike Duplicate % Recovery: 85 85 90 88 Relative % Difference: 6.1 6.1 12 7.0 SE OIA ANALYTICAL Please Note: The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, �^ preparation and analytical methods employed for the samples. The LCS as recovery data is used for validation of sample batch results. Due to matrix effects,the QC limits for MS/MSG's are advisory only Linda C. Schneider and are not used to accept or reject batch results. Project Manager 5110919.01-T <2>