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1 + <br /> Sequoia 680 Chesapeake Dave Redwood City CA 94063 (415) 364 %00 FAX(415)364 9233 <br /> 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686%00 FAX(510)686 9689 <br /> Analytical 819 Smker Avenue Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> : Y r" r r,.Y <br /> RESNA ­'C64 <br /> ,,,u Clierrt Project ID 150041 01, San Joaquin <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention Lois Frantz OC Sample Group 4DH7202 w Reported May 12, 1994-' <br /> 'Y ri J .. +r l +, . . ry • + ?]N-v, n 1t SY.4}v,% }w ww gyp- 3 <br /> , ' r n r n v ♦r v [ .vn r. ,♦ w t <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 6020 EPA 8020 <br /> Analyst: J Fontcha J Fontcha J Fontcha J Fontcha <br /> MS/MSD <br /> Batch# 4041349 4041349 4041349 4041349 <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 I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Conc Spiked: 20Ng/L 20,ug/L 20Ng/L 80pg/L <br /> Matrix Spike <br /> %Recovery- 95 105 100 103 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 95 105 100 103 <br /> Relative% <br /> Difference 00 00 00 00 <br /> r10 -'r`X�v'[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 72-126 72-130 71-120 <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS 1s a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> . ELAP#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 If <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 40H7201 WAT <a> <br />