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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> -RESNA n Client Project ID 150047 01 Ekholm Property <br /> 1710 Main Street Matrix Liquid <br /> n Escalon, CA 95320 <br /> Attention John Lane OC Sample Group 4C84901-3 Reported Mar 23, 19944 <br /> v v w w vu..v. v w....v. . n»n s. w... n v . w vv v.v.. v r ry r{n n♦ u wK. +n nr.v.v.m r.... 'C r?♦wY v„ w SVY.n v.4sv}.+n{r Snv V v r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Method. EPA 9020 EPA 8020 EPA X120 FFA WD EPA 8015 <br /> Anal st: J Minkel J Minkel J Minkel J Minkel A Nagra <br /> MS/MSD <br /> Batch#: 4C70201 4070201 4C70201 4070201 4084902 <br /> Date Prepared: - - - 3/16/94 <br /> Date Analyzed: 3/15/94 3/15/94 3/15/94 3/15/94 3/17/94 <br /> Instrument I D #: GCHP-3 GCHP-3 GCHP-3 GCHP_3 GCHP-4 <br /> Conc Spiked: 10yg/L long/L 10Ng/L 30yg/L 6o0ug/L <br /> Matrix Spike <br /> %Recovery: 100 110 110 103 69 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery. 100 100 100 103 69 <br /> Relative% <br /> Difference: 00 95 9 5 0 0 00 <br /> ,. t v r " :., - '.= , ` i r - . , r ,r •t v<r r ,ry,v . <br /> LCS Batch# <br /> Date Prepared: - - - <br /> Date Analyzed: - - - <br /> Instrument 1 D.#- - - - <br /> LCS% <br /> Recovery- <br /> %Recovery <br /> Control Limits 71-133 72-128 72-130 71-120 28-122 <br /> Please dote <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 01201.101A ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> kluac'uck­ <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure Hthe 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 4Ca4901 WAT <3> <br />