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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 19W Bates Avenue,Suite L Concord CA 94520 (510) 686 9600 FAX(510)686-9689 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ! 4 ry + .• J W LY �k m� � <br /> RESNA Client Project ID 150041 01,San Joaquin + ry l} J ry h A <br /> 1710 Main Street Matrix Liquid <br /> ,Escalon, CA 95320 <br /> Attention Lois Frantz OC Sample Group 4DH7201, 3 4 Reported MayA 12, 1994" <br /> r <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 J Fontcha J Fontcha J Fontcha J Fontcha <br /> MS/MSD <br /> Batch#: 40502e3 40502x3 4050283 4050283 <br /> Date Prepared. 5/9/94 5/9/94 5/9/94 5/9/94 <br /> Date Analyzed: 5/9/94 5/9/94 5/9/94 5/9/94 <br /> Instrument LD #: GCHP-4 GCHP-4 GCHP-4 GCHP-4 <br /> Conc. Spiked, 20Ng/L 20kg/L 20ug/L 80Pg/L <br /> Matrix Spike <br /> %Recovery: 120 90 95 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 120 90 95 97 <br /> Relative% <br /> Difference: 00 00 00 42 <br /> ""v " '"" ' • S� . v` ti y . 5 ��. }'� ' 'F ii ��'itk A. ik 4� �rO rr 33L��x� L�,� r <br /> n vv r n F v i,1r �F 5^h t'iux,.L�w,..:.ivn}�.{ ,ry.{.4.,v +m,C•„ SU` L A tr...,.,.,,.:Jury,.. h.l t>.• vs n uvCG Cwvh v rvwrvL{}{0.v�x w,{��vvc�.K�viv.,,�};n APSK+H..v'�.t.R w'+vo R n <br /> LCS Batch# <br /> Date Prepared: <br /> Date Analyzed. <br /> Instrument I D_#- <br /> LCS % <br /> Recovery: - - <br /> % ecovery <br /> Control Limits* 71-133 72-128 72-130 71-120 <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> LAP#1271 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 N <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager 4DH7201 WAT <2> <br />