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SeSeU®la 680 Cake Drive Redwood City, CA 94063 50) 364-9600 FAX (650) 364-9233 <br />404 N. iget Lane Walnut Creek, CA 94598 (925) 988-9600 FAX (925) 988-9673 <br />Analytical 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 />... ..:... .:.. <br />Geftler-Ryan - bublin Client Project ID. Chevron #9-3232, Stockton <br />6747 Sierra Court, Suite J Matrix: Solid <br />Dublin, CA 94568 <br />Attention: Greg Gurss QC Sample Group: 9031092-104 Reported: Mar 17, 19! <br />ANALYTE <br />1,1-Dichloro- <br />Trichloro- <br />Chloro- MTBE Oil & Grease <br />LCS031299 <br />ethene <br />ethene <br />benzene <br />Method: <br />EPA 8010 <br />EPA 8010 <br />EPA 8010 EPA 8260 SM 5520 <br />Analyst: <br />P. Kosovskaya <br />P. Kosovskaya <br />P. Kosovskaya N. Nelson N. VanSlambrook <br />MS/MSD <br />LCS031299 <br />LCS031299 <br />LCS031299 <br />LCS031299 <br />LCS031299 <br />Batch#: <br />9030166 <br />9030166 <br />9030166 <br />9031092 <br />9031103 <br />Date Prepared: <br />3/11/99 <br />3/11/99 <br />3/11/99 <br />3/12/99 <br />3/12/99 <br />Date Analyzed: <br />3/11/99 <br />3/11/99 <br />3/11/99 <br />3/14/99 <br />3/14/99 <br />Instrument I.D.#: <br />HP -6 <br />HP -6 <br />HP -6 <br />GC/MS-2 <br />Manual <br />Conc. Spiked: <br />1000Ng/kg <br />1000 Ng/kg <br />1000 Ng/kg <br />2500 Ng/kg <br />5000 mg/kg <br />Matrix Spike <br />% Recovery: <br />150 <br />170 <br />160 <br />113 <br />122 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />140 <br />160 <br />140 <br />113 <br />126 <br />Relative % <br />Difference: <br />6.9 <br />6.1 <br />13 <br />0.0 <br />3.2 <br />LCS Batch#: <br />LCS031299 <br />LCS031299 <br />LCS031299 <br />LCS031299 <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 />3/12/99 <br />3/12/99 <br />3/12/99 <br />3/14/99 <br />3/14/99 <br />Instrument I.D.#: <br />HP -6 <br />HP -6 <br />HP -6 <br />GC/MS-2 <br />Manual <br />LCS % <br />Recovery: <br />120 <br />130 <br />130 <br />100 <br />116 <br />Recovery <br />Control Limits: 65-135 70-130 70-130 70-130 70-130 <br />SEQUOIA ANALYTICAL, #1271 <br />Julianne 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 />9031092.GET <27> <br />