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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dnve • Redwood City, CA 94063 <br /> (415) 364-9600 • FAX(415) 364-9233 <br /> REMA " V ' .r.. 'dlent Projerct IDr 150047 01, Ekholm Property <br /> 1710 Main Street Matrix Sod <br /> Escalon, CA 95320 <br /> Attention John Lane OC Sample Group 4A40306 Reported Jan 25, 1994 <br /> + v r + • r.w rin.. w r`+ rrr nr +xvf r;+{vrw r r r • + rr r x `r v,'}'r ,�4.n+ v vn,.w,. nr rc rr nxn r++.v ++ + � + + + <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Total oil& 1,1-CCE TGE Chloro- PCB 1242 <br /> Grease benzene <br /> Method: EPA 5520EF EPA 8010 EPA 8010 EPA 8010 EPA 8080 <br /> Analyst: J Bali G Kern G Kern G Kem L Haar <br /> MS/MSD <br /> Batch#. 4A40306 3LD3401 3LD3401 3LD3401 BLK011094 <br /> Date Prepared: 1/13/94 1/10/94 1/10/94 1/10/94 1/10/94 <br /> Date Analyzed: 1/18/94 1/10/94 1/10/94 1/10/94 1/14/94 <br /> Instrument I D#: N/A GCHP-9 GCHP-9 GCHP-9 GCHP-12 <br /> Conc. Spiked, 1000 mg/kg 25 pg/kg 25,ug/kg 25 pig/kg 1000 fug/kg <br /> Matrix Spike <br /> % Recovery* 110 92 104 100 78 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 110 97 107 100 84 <br /> Relative% <br /> Difference: 00 53 28 00 74 <br /> y}r }l � h+• +n. Y�r�}~4}ti Qv} r Jv�r+v + n+ iSwv vry u~ry . r � r v}v�vr fiv rr { wtvn +Y � } i3: +� <br /> LCS Batch#' BLK011394 BLK011094 81-KOI1094 BLK011094 - <br /> Date Prepared: 1/13/94 1/10/94 1/10/94 1/10/94 <br /> Date Analyzed: 1/18/94 1/10/94 1/10/94 1/10/94 - <br /> Instrument I.D.#: N/A GCHP-9 GCHP-9 GCHP-9 - <br /> LCS% <br /> Recovery 100 108 108 104 - <br /> % Recovery <br /> Control Limits: 70-110 28-167 35-146 38-150 30-140 <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 /> forted with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> k—FCKK�� 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 TagLjW <br /> Project Manager 4A40301 WAT <10> <br />