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11lesapeal`e Drive Redwood City. 94063 ,650) 364-9600 FAX(650)364-9733 <br /> Sequoia <br /> 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-%00 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-01 o0 <br /> Analytical 1455 McDowell Blvd. North.Ste. D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc. Client Project ID' Chevron 9-0557,'981108-Ti <br /> 1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> Attention: Christine Lillie Work Order # 9811694-04-06 Reported: Dec 2, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: 8110248 8110248 8110248 8110248 <br /> Analy. Method: EPA 8015M/8020M EPA 8015M/8020M EPA 8015M/8020M EPA 8015M/8020M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: - <br /> MS/MSD #: P811131-02 psi 1131-02 P811131-02 P811131-02 <br /> Sample Cone.: N.D N.D N D N.E) <br /> Prepared Date: 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Analyzed Date: 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Instrument 1.D.#: - - <br /> ConC. Spiked: 100 u9/L 100 ug/L 10opg/L 300 ug/L <br /> Result: 91 4 91 92 1 281 <br /> MS % Recovery: 91 4 91 92 1 93 7 <br /> Dup. Result: 90 896 906 276 <br /> I ISD % Recov.: 90 89.6 906 92 <br /> RPD: 1 54 1.55 1 64 1 8 <br /> APD Limit: 0-5 0-6 0-4 0-5 <br /> LCS #: LCS111698 LCS111698 LCS111698 LCS 111698 <br /> Prepared Date: 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Analyzed Date: 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Instrument LD-#: - - <br /> Cone. Spiked: 100 pg/L 100 ug/L 100 N9/L 300 p9/L <br /> LCS Result: 91.5 91.5 92.7 285 <br /> LCS % Recov,: 91.5 91.5 92.7 95 <br /> 82-119 80-117 66-125 73-119 <br /> LCS 84-116 81-117 79-115 80-114 <br /> Control Limits <br /> Please Note: <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap#2245 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 /> gory <br /> r t Manager MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9811694.BLA <2> <br />