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Sequoia <br />a -) <br />Analytical <br />680 Chesapeake Drive Redwood City, CA 94063 <br />404 N Wiget Lane Walnut Creek. CA 94598 <br />819 Striker Avenue Suite 8 Sacramento CA 95834 <br />1455 McDowell Blvd North Ste D Petaluma, CA 94954 <br />(650) 364-9600 <br />(925) 988-9600 <br />(916) 921-9600 <br />(707) 792-1865 <br />FAX (650) 364-9233 <br />FAX (925) 988-9673 <br />FAX (916) 921-0100 <br />FAX (707) 792-0342 <br />Oettler-Ryan - Dublin <br />Client Project ID <br />Chevron #9-5775, Lodi <br />PCB 1260 <br />Method <br />6747 Sierra Court, Suite J <br />Matrix <br />Solid <br />EPA 6010 <br />EPA 6010 <br />Dublin, CA 94568 <br />EPA 8081 <br />Analyst <br />J Kelly <br />J Kelly <br />Attention Greg A Gurss <br />QC Sample Group <br />8082208-221 <br />Reported <br />Sep 1, 1998 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE <br />Cadmium <br />Chromium <br />Capper <br />Nickel <br />Lead <br />Zinc <br />PCB 1260 <br />Method <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 8081 <br />Analyst <br />J Kelly <br />J Kelly <br />J Kelly <br />J Kelly <br />J Kelly <br />J Kelly <br />L Bettencourt <br />MS/MSD <br />LCS062698 <br />Batch# <br />8082219 <br />Date Prepared <br />8/26/98 <br />Date Analyzed <br />8/26/98 <br />Instrument I D # <br />MV -4 <br />Conc Spiked <br />50 mg/kg <br />Matrix Spike <br />8/26/98 <br />% Recovery <br />98 <br />Matrix Spice <br />8/25/98 <br />Duplicate % <br />MV 4 <br />Recovery <br />MV -4 <br />Relative % <br />GCHP 4B <br />Difference <br />58 <br />LCS Batch# <br />LCS062698 <br />Date Prepared <br />8/26/98 <br />Date Analyzed <br />8/26/98 <br />Instrument I D # <br />MV -4 <br />LCS % <br />8/26/98 <br />Recovery <br />110 <br />8082219 <br />8082219 <br />8082219 <br />8082219 <br />8082219 <br />P808301 01 <br />8/26/98 <br />8/26/98 <br />8/26/98 - <br />8/26/98 <br />8/26/98 <br />8/25/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/25/98 <br />MV -4 <br />MV 4 <br />MV -4 <br />MV -4 <br />MV -4 <br />GCHP 4B <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />333 Ng/kg <br />86 <br />88 <br />68 <br />90 <br />22 <br />97 <br />* <br />LCS082698 <br />LCS082698 <br />* <br />LCS082698 <br />98 <br />59 <br />58 <br />57 <br />72 <br />65 <br />00 <br />LCS082698 <br />LCS082698 <br />LCS082698 <br />LCS082698 <br />LCS082698 <br />LCS082598 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/25/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/26/98 <br />8/25/98 <br />MV -4 <br />MV -4 <br />MV 4 <br />MV -4 <br />MV 4 <br />GCHP 48 <br />112 112 110 106 114 116 <br />% Recovery <br />Control Limits 80-120 80-120 80-120 80-120 80 120 80-120 40-140 <br />SEQUOIA ANALYTICAL, #1271 <br />& #1210 <br />�L �tN►t�c. L.�t-��. G <br />Ilanne 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 />** MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative % Difference <br />/slue undeterminable due to matrix Interference and/or concentration In sample <br />8082208 GET <34> <br />r� <br />