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r <br /> Sequoia 680 Chesapeake Dwm 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 /> Fugro West, Inc Client Project ID 9347-1044 Exxon 7-0137 <br /> 1050 Melody Lane, Suite 160 Matrix Liquid <br /> Rosevdie, CA 95678 <br /> Attention Paul Graff Work Order# 9502989-03, 5 Reported Feb 28 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Anaiyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> aC Batch# GsCO22095STEX03A GCO22095BTEX03A GCO220958TEX03A '3CO2?095BTEX03A <br /> Anaiy Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD#: 950258302 950258302 950258302 950258.302 <br /> Sample Conc. N D N D N D NO <br /> Prepared Date. 2/20/95 2/20/95 2/20/95 2/20/95 <br /> Analyzed Date, 2/20/95 2/20/95 2/20/95 2/20/95 <br /> Instrument 1.0 #, GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked: 10 ug/L 10 pg/L 10 ug/L 30 ug/L <br /> Result. 97 94 93 28 <br /> MS % Recovery, 37 94 93 93 <br /> Dup Result- 39 33 83 25 <br /> MSD % Recov 39 83 83 83 <br /> RPD $5 12 11 11 <br /> RPD Limit: 50 0-50 c�-50 0-50 <br /> LCS # <br /> Prepared Date <br /> Analyzed Date: - <br /> Instrument I D # <br /> Conc. Spiked- <br /> LCS Result: <br /> LCS % Recov <br /> LCS 71 133 72-128 72130 71-120 <br /> Control Limits <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 /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of anaiytes 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 Vague Clark <br /> Project Manager '*MS=Matrix Spike,MSO=MS Duplicate,RPO=Relative%Difference 9502989 FFF <2> <br />