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(i) Sequoia ` 680 Chesapeake Drive Redwood City,CA 940.- {415) 364-96U(' FAX(415; 964-9233 <br /> 1� 404 N.Wiget Lane Walnut Creek,CA 9459 (5f0) 988.9600 FAX(510)988-9673 <br /> Analytical 619 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 92t-9600 FAX(916)92 1-0100 <br /> ... ..... .... .:......... ..................::,..Touchstone <br /> .. ...:....:.. ..:...............................:..........:...:...........,...............:.......,:iii:-�- <br /> . <br /> l] v �1 <br /> e elo::.m ri# <br /> . C entf'ro`ecta:��::::: <br /> 1 on 9 1452 <br /> ;1.5807 Balboa Drive Matrix; Solid <br /> `>Oakland, CA 94611 <br /> :::Attention: Robert Mallory Work Order#: 9509100-07, 08 Reported: Oct8, 1995 <br /> ::::.�.:. ....:..:.:.::::.::::.:.::.:�:::::.::..::.:::..:.�::::..:::::.:.�::..:�::......................... ..... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Total Recoverable Diesel <br /> Petroleum Hydrocarb. <br /> OC Latch#: OP0928955520EXA GCO928950HBPEXA <br /> Analy. Method: SM 5520 EF-MOD EPA 8015M <br /> Prep. Method: EPA 3550 EPA 3550 <br /> Analyst: C.Garde T.Olive <br /> MS/MSD#: 95091=5107 950910008 <br /> Sample Cone.: N.D. N.D. <br /> Prepared Date: 9/28/95 9/28/95 <br /> Analyzed Date: 9/29/95 9/29/95 <br /> Instrument I.D.#: Manual GCHP4 <br /> Cone. Spiked: 500 mg/Kg 25 mg/Kg <br /> Result: 380 24 <br /> MS%Recovery: 76 96 <br /> .. Dup. Result: 390 21 <br /> MSD% Recov.: 78 84 <br /> RPD: 2.6 3.3 <br /> RPD Limit: 0.50 0-50 <br /> LCS#: BLK092895 BLK092895 <br /> Prepared Date: 9/28/95 9/28/95 <br /> Analyzed Date: 9/29/95 9/29/95 <br /> Instrument I.D.#: Manual GCHP4 <br /> Cone. Spiked: 500 mg/Kg 25 mg/Kg <br /> LCS Result: 360 22 <br /> LCS% Recov.: 72 88 <br /> MS/MSD 60-140 <br /> LCS 70-110 38-122 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,interferent-tree 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 /> + 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 /> ar J. Cargasacchi <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9509-100.TTT <2> <br />