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Se ®la 680 Chesapeake Drive Redwood City, CA 94063 650) 364-9600 FAX (650) 364-9233 <br />404 N. Wiget 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 />Gettler-Ryan Dublin 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: 9031116-129 Reported: Mar 16, 19! <br />ANALYTE <br />Phenol <br />2 -Chlorophenol <br />1,4-Dichloro- <br />N -Nitroso -Di- <br />1,2,4-Trichloro- <br />4 -Chloro -3 - <br />Date Analyzed: <br />3/15/99 <br />3/15/99 <br />benzene <br />N-propylamine <br />benzene <br />Methylphenol <br />Prep. Method: <br />EPA 3550 <br />EPA 3550 <br />EPA 3550 <br />EPA 3550 <br />EPA 3550 <br />EPA 3550 <br />Method: <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />Analyst: <br />L. Diaz <br />L. Diaz <br />L. Diaz <br />L. Diaz <br />L. Diaz <br />L. Diaz <br />MS/MSD <br />Batch#: BLK031299 BLK031299 BLK031299 BLK031299 BLK031299 BLK031299 <br />Date Prepared: <br />3/12/99 <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 />3/15/99 <br />3/15/99 <br />Instrument I.D.#: <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />Conc. Spiked: <br />5000 Ng/kg <br />5000 Ng/kg <br />3300 Ng/kg <br />3300 Ng/kg <br />3300 Ng/kg <br />5000Ng/kg <br />Matrix Spike <br />% Recovery: <br />68 <br />74 <br />73 <br />85 <br />76 <br />68 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />70 <br />78 <br />76 <br />88 <br />79 <br />74 <br />Relative % <br />Difference: <br />2.9 <br />5.3 <br />4.1 <br />3.5 <br />3.9 <br />8.5 <br />RPD Limit: <br />0-40 <br />0-40 <br />0-40 <br />0-40 <br />0-40 <br />0-40 <br />LCS Batch#: <br />Date Prepared: <br />Date Analyzed: _ <br />Instrument I.D.#: <br />LCS % <br />Recovery: - <br />Recovery <br />Control Limits: 26-90 25-102 28-104 41-126 38-107 26-103 <br />SEQUOIA ANALYTICAL, #1271 <br />Julianne Fegley <br />Project Manager <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 />Page 1 of 2 <br />9031116 -GET <34> <br />