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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)x364-9,233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925}988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Sequoia Analytical Client Project ID L905535-TRMI EH&S <br /> 1551 Industrial Blvd Matrix Liquid <br /> San Carlos, CA 94070 <br /> Attention Mike Gregory OC Sample Group 9060199-213 Reported Jun 21, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> CSC Batch#. <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst <br /> LCS/LCSD # <br /> Sample Conc <br /> Prepared Date <br /> Analyzed Date <br /> Instrument I D # <br /> Conc Spiked. <br /> Result <br /> LCS % Recov <br /> Dup Result <br /> LCSD % Recov <br /> RPD <br /> RPD Limit <br /> LCS-# 2LCS060399 2LCS060399 2LCS060399-2LCS060399 <br /> -Prepared Date -- 06/03/99-- - —06/03/99 --- 06/03/99 06/03/99- - - - - --- - --- <br /> Analyzed Date 06/03/99 06/03/99 06/03/99 06/03/99 <br /> Instrument I D # HP-2 HP 2 HP-2 HP 2 <br /> Conc Spiked 20 frg/L 20 pg/L 20,ug/L 60 pg/L <br /> LCS Result 20 18 19 61 <br /> LCS % Recov 100 90 95 102 <br /> LCSD Result 21 19 20 62 <br /> LCSD % Recov 105 95 100 103 <br /> LCS 70-130 70-130 70-130 70-130 <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 /> SE01 InIA ANALYTICAL, #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 /> 94;� .interference,the LCS recovery is to be used to validate the batch <br /> Charlie Westwater = matrix Spike,M80 = MS Duplicate, RPD = Relative%Uitterence <br /> Project Manager <br /> 9060199 SSS <4> <br />