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Se u®la 680 Ch eake Drive Redwood City. CA 940630650) 364-9600 FAX(650)364-9233 <br />15)Ana <br />404 N. Wiaet Lane Walnut Creek. CA 94598 (925) 988-9600 FAX (925) 988-9673 <br />Al lallCa� 819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921-0100 <br />1455 McDowell Blvd. North, Ste. D Petaluma CA 94954 (707) 792-1865 FAX (707) 792-0342 <br />Gettler-Ryan <br />-Dublin Client Project ID: Chevron #9-3232, Stockton <br />6747 Sierra Court, Suite J Matrix: Solid <br />Dublin, CA 94568 <br />Attention: Greg Gurss OC Sample Group: 9031116-129 Reported: Mar 16, 1999 <br />C�1iIi����z•Z�7�i:zi � � _ : � • <br />ANALYTE Benzene <br />Toluene Ethyl Xylenes Oil & Grease <br />4LCS031299 <br />Benzene <br />Method: EPA 8020 <br />EPA 8020 EPA 8020 EPA 8020 SM 5520 <br />Analyst: J. Minkel <br />J. Minkel J. Minkel J. Minkel N. VanSlambrook <br />MS/MSD <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />LCS031299 <br />Batch#: <br />9031120 <br />9031120 <br />9031120 <br />9031120 <br />9031103 <br />Date Prepared: <br />3/12/99 <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 />3/14/99 <br />Instrument I.D.#: <br />HP -4 <br />HP -4 <br />HP -4 <br />HP -4 <br />Manual <br />Conc. Spiked: <br />0.80 mg/kg <br />0.80 mg/kg <br />0.80 mg/kg <br />2.4 mg/kg <br />5000 mg/kg <br />Matrix Spike <br />% Recovery: <br />101 <br />88 <br />91 <br />100 <br />122 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />100 <br />89 <br />91 <br />100 <br />126 <br />Relative % <br />Difference: <br />1.2 <br />1.4 <br />0.0 <br />0.0 <br />3.2 <br />LCS Batch#: <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />4LCS031299 <br />LCS031299 <br />Date Prepared: <br />3/12/99 <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 />3/14/99 <br />Instrument I.D.#: <br />HP -4 <br />HP -4 <br />HP -4 <br />HP -4 <br />Manual <br />LCS % <br />Recovery: <br />99 <br />85 <br />88 <br />96 <br />116 <br />Recovery <br />Control Limits: 50-150 50-150 50-150 50-150 70-130 <br />SEQUOIA ANALYTICAL, #1271 <br />I$LA" h.L <br />ulianne 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 recoveEX is to be used to validate the batch. <br />9031116.GET <31 > <br />