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1 Sequoia 680 Chesapeake Drive Redwood City.CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)986-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 11W1455 McDowell Blvd.North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ,ether-Ryan -Dublin CiIBllt�roject jD: Tosco#111'95, Lathrop <br /> '747 Sierra Court, Suite J Matrix: Solid <br /> =< Dublin, CA 94568 <br /> Attention: Clyde Galantine QC Sample Group: 9010220-227 Reported: Jan 14, 1999;:: <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: SP010799 SP010799 SP010799 SP010799 <br /> 8020EXA 8020EXA 8020EXA 8020EXA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: C.Westwater C.Westwater C,Westwater C.Westwater <br /> MS/MSD #: 9010222 9010222 9010222 9010222 <br /> Sample Cone.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 1/7/99 1/7/99 1/7/99 1/7/99 <br /> Analyzed Date: 1/7/99 1/7/99 1/7/99 1/7/99 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Cone. Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg <br /> Result: 0.82 0.69 0.71 2.4 <br /> MS % Recovery: 103 86 89 100 <br /> Dui]. Result: 0.83 0.70 0.72 2.4 <br /> MSD % Recov.: 104 88 90 100 <br /> RPD: 1.2 1.4 1.4 0.0 <br /> RPD Limit: 0-20 0-20 0-20 0-20 <br /> ....................-. .............-............-..-...........-.....-.......-...........-......-......-..-...-........-..-..-..............................._..... <br /> LCS #: 4LCS010799 4LCS010799 4LCS010799 4LCS010799 <br /> Prepared Date: 1/7/99 1/7/99 1/7/99 1/7/99 <br /> Analyzed Date: 1/7/99 1/7/99 1/7/99 1/7/99 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Cone. Spiked: 0,80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg <br /> LCS Result: 0.95 0.80 0.81 2.7 <br /> LCS % Recov.: 119 100 101 113 <br /> LCS 50-150 50-150 50-150 50-150 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,i nterte rent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA 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 /> WtiL�LVt I�� 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 /> Lllianne Fegley **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager <br /> 9010220,GET <14> <br />