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SENT BY: XEROX Telecopier 7017; 5— 3-94 ; 10:48 4153649233• 12098383509;825 <br />SEQUOIAANALYTICAL <br />680 Chesapeake Drive Redwood City, CA 94063 <br />(415) 364-9600 • FAX 15) 364-9233 <br />Rheem Drive, Suite B Ma . Sol <br />anion, CA 84588 <br />tion: John Lamb OC mole Group: 3L71601f Reported: Dec <br />MS/MSD <br />12/17/93 <br />QL <br />ALITY CONTROL DATA REPORT <br />ANALYTE <br />Beryllium <br />Date Analyzed: <br />Cadmium Chromium Nickel Mercury <br />Method: <br />EPA 6010 <br />Conc. Spiked: <br />EPA 6010 EPA 5010 EPA 6010 EPA 7471 <br />Analyst: <br />C. Medetesser <br />% Recovery: <br />Medefesser C. Medefesaer C. Medefesser A McDonald <br />MS/MSD <br />12/17/93 <br />Batch#: <br />31-42701 <br />Date Prepared: <br />12/17/93 <br />Date Analyzed: <br />12/19/93 <br />Instrument I.D.#: <br />MTJA-2 <br />Conc. Spiked: <br />100 mg/kg <br />Matrix Spike <br />100 mg/kg <br />% Recovery: <br />99 <br />Matrix Spike <br />12/16/93 <br />Duplicate % <br />MTJA-2 <br />Recovery: <br />99 <br />Relative % <br />MPE-2 <br />Difference: <br />0.0 <br />31-42701 3L42701 3L42701 31-71606 <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/16/93 <br />12/19/93 <br />12/19/93 <br />12/19/93 <br />12/16/93 <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />MPE-2 <br />100 mg/kg <br />100 mg/kg <br />100 mg/kg <br />1.0 mg/kg <br />97 97 102 30 <br />98 <br />100 <br />99 <br />33 <br />1.0 <br />3.0 <br />3.0 <br />9.5 <br />LCS Batch#: <br />BLK121793 <br />BLK121793 <br />BLK121793 <br />BLK121793 <br />CCV121693 <br />Date Prepared: <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/16/93 <br />Date Analyzed: <br />12/19/93 <br />12/19/93 <br />12/19/93 <br />12/19/93 <br />12/16/93 <br />Instrument I.D.#: <br />MTJA-2 <br />MTJA4 <br />MTJAr2 <br />MTJA•2 <br />MPE-2 <br />LCS % <br />Recovery: <br />103 <br />102 <br />104 <br />105 <br />107 <br />Recovery <br />Control Limits: <br />75125 <br />75-125 <br />75-125 <br />75125 <br />75-125 <br />SEOUOII:�C NALYI`ICAL <br />Vick Tagu���� <br />Project Manager <br />LCS is a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />ition, and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br />with known quantities of specific compounds and subjected to the entire analytical procedure. If <br />wery of analytes from the matrix spike does not fall within specified control limits due to matrix <br />snce, the LCS recovery is to be used to validate the batch. <br />31-71601,RES <23> <br />