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® <br /> Sequoia <br /> Drive Redwood City,CA 9404 (650)364-9600 FAX(650)364-9233 <br /> Seqy oia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> /�yry .{- +� 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> I'111a1y 61C(4�, 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Project ID: Texaco 305 S. Hutchins <br /> 1680 Rogers Ave. <br /> San Jose, CA 95112 <br /> Attention: Fran Thie QC Sample Group: 9810726-01-04 Reported: Oct 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015 <br /> Analyst: NC/GR <br /> ANALYTE Gasoline <br /> QC Batch#: GC101498BTEX02A <br /> Sample No.: GW9809186-2 <br /> Date Prepared: 10/14/98 <br /> Date Analyzed: 10/14/98 <br /> Instrument I.D.#: GCHP02 <br /> Sample Conc., ug/L: N.D. <br /> Cone.Spiked, ug/L: 250 <br /> Matrix Spike, ug/L: 240 <br /> % Recovery: 97 <br /> Matrix <br /> • pike Duplicate, ug/L: 240 <br /> % Recovery: 94 <br /> elative% Difference: 3.1 <br /> RPD Control Limits: 0-25 <br /> LCS Batch#: GWLCS101498A <br /> Date Prepared: 10/14/98 <br /> Date Analyzed: 10/14/98 <br /> Instrument I.D.#: GCHP02 <br /> Cone.Spiked,ug/L: 250 <br /> LCS Recovery,ug/L: 260 <br /> LCS%Recovery: 102 <br /> Percent Recovery Control Limits: <br /> MS/MSD 60-140 <br /> LCS 70-130 <br /> Quality A s rance Statement: All standard operating procedures and quality control requirements have been met. <br /> Please No[e: <br /> �— The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> . $EQ 0 ANALYTICA 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 /> Peggy P nner <br /> Project Manager <br />