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Sequoia <br />�0 Chesapeake Drive Redwood City CA 94063 <br />404 N Wiget Lane Walnut Creek CA 94598 <br />(650) 364-9600 <br />(925) 988-9600 <br />FAX(650)364-9Z33 <br />FAX (925) 988-9673 <br />Analytical <br />819 Striker Avenue Suite 8 Sacramento CA 95834 <br />1455 McDowell Blvd North Ste D Petaluma, CA 94954 <br />(916) 921-9600 <br />(707) 792-1865 <br />FAX (916) 921-0100 <br />FAX (707) 792-0342 <br />ettler-Ryan - Dublin <br />Tient Project ID Chevron #9-5775, Lodi <br />FPA 8010 <br />EPA 8010 EPA 8015 EPA 8081 <br />747 Sierra Court, Suite J <br />Matrix Solid <br />P Kosovskaya <br />P Kosovskaya K Grubb L Bettencourt <br />Dublin, CA 94568 <br />8/25/98 <br />Date Analyzed <br />8/28/98 <br />Attention Greg A Gurss <br />QC Sample Group 808-2196 <br />Reported <br />Sep 1, 1998 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE <br />1,1-Dichiero- <br />Trichloro- <br />Chloro- Diesel PCS 1260 <br />LCS082598 <br />ethene <br />ethene <br />benzene <br />Method <br />EPA 8010 <br />FPA 8010 <br />EPA 8010 EPA 8015 EPA 8081 <br />Analyst <br />P Kosovskaya <br />P Kosovskaya <br />P Kosovskaya K Grubb L Bettencourt <br />MS/MSD <br />LCS082598 <br />LCS082598 <br />LCS082598 <br />LCS082598 <br />LCS082598 <br />Batch# <br />8082221 <br />8082221 <br />8082221 <br />8082134 <br />P808301 01 <br />Date Prepared <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />Date Analyzed <br />8/28/98 <br />8/28/98 <br />8/28/98 <br />8/26/98 <br />8/25/98 <br />Instrument I D # <br />HP -6 <br />HP -6 <br />HP -6 <br />HP -3A <br />GCHP4B <br />Conc Spiked <br />200ug/kg <br />200ug/kg <br />200ug/kg <br />15 mg/kg <br />333Ng/kg <br />Matrix Spike <br />% Recovery <br />125 <br />95 <br />90 <br />80 <br />97 <br />Matrix Spike <br />0 Duplicate % <br />Recovery <br />105 <br />80 <br />80 <br />87 <br />98 <br />Relative % <br />Difference <br />17 <br />17 <br />12 <br />80 <br />00 <br />LCS Batch# <br />LCS082598 <br />LCS082598 <br />LCS082598 <br />LCS082598 <br />LCS082598 <br />Date Prepared <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />Date Analyzed <br />8/25/98 <br />8/25/98 <br />8/25/98 <br />8/26/98 <br />8/25/98 <br />Instrument I D # <br />HP -7 <br />HP 7 <br />HP 7 <br />HP -3A <br />GCHP-48 <br />LCS % <br />Recovery <br />80 <br />70 <br />75 <br />73 <br />116 <br />ecovery <br />Control Limits 65-135 70 130 70.130 60.140 40-140 <br />SEQUOIA ANALYTICAL, #1271 <br />,W��� &#121a <br />�r✓F <br />* panne 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 fail within specified control limits due to matrix <br />Interference the LCS recovery is to be used to validate the batch <br />8082196 GET <8> <br />