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680 Apeake Drive Redwood City. CA 94063 (650) 364-%00 FAX (650) 364-9233 <br />Se U®la <br />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 />Gettler-Ryan Dublin Client ##9-3232, Stockton <br />6747 Sierra Court, Suite J Matrix: Solid <br />Dublin, CA 94568 <br />Attention: Greg Gurss QC Sample Group: 9031105-115 Reported: Mar 17, 19 <br />ANALYTE Benzene <br />Toluene Ethyl Xylenes <br />4LCS031299 <br />Benzene <br />Method: EPA 8020 <br />EPA 8020 EPA 8020 EPA 8020 <br />Analyst: J. Minkel <br />J. Minkel J. Minkel J. Minkel <br />MS/MSD <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />Batch#: <br />9031120 <br />9031120 <br />9031120 <br />9031120 <br />Date Prepared: <br />3/12/99 <br />3/12/99 <br />3/12/99 <br />3/12/99 <br />Date Analyzed: <br />3/15/99 <br />3/15/99 <br />3/15/99 <br />3/15/99 <br />Instrument I.D.#: <br />HP -4 <br />HP -4 <br />HP -4 <br />HP -4 <br />Conc. Spiked: <br />0.80 mg/kg <br />0.80 mg/kg <br />0.80 mg/kg <br />2.4 mg/kg <br />Matrix Spike <br />% Recovery: <br />101 <br />88 <br />91 <br />100 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />100 <br />89 <br />91 <br />100 <br />Relative % <br />Difference: <br />1.2 <br />1.4 <br />0.0 <br />0.0 <br />LCS Batch#: <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />Date Prepared: <br />3/12/99 <br />3/12/99 <br />3/12/99 <br />3/12/99 <br />Date Analyzed: <br />3/15/99 <br />3/15/99 <br />3/15/99 <br />3/15/99 <br />Instrument I.D.#: <br />HP -4 <br />HP -4 <br />HP4 <br />HP -4 <br />LCS % <br />Recovery: <br />99 <br />85 <br />88 <br />96 <br />Recovery <br />Control Limits: 50-150 50-150 50-150 50-150 <br />SEQUOIA ANALYTICAL, #1271 <br />- JI -4& <br />�VLibt�yy� <br />anne Fegley <br />Project Manager <br />Please Note: <br />The LCS is a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />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 />9031105.GET <15> <br />