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6747 Sierra Court, Ste J <br />Dublin, CA 94568 <br />Attention: Dave Vossler <br />680 SWpeake Drive <br />404 et Lane <br />Redwood City, CA 94063 <br />Walnut Creek, CA 9459 <br />(650) 364-9600 <br />(510) 988-9600 <br />FAX(650)364-9233 <br />FAX (510) 988-9673 <br />819 St er Avenue. Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />1455 McDowell Blvd. North, Ste. D <br />Petaluma, CA 94954 <br />(707) 792-1865 <br />FAX(707)792-0342 <br />Matrix: Solid <br />Work Order #: 9805G06 01 <br />Jun 16. 1998 <br />Analyte: Beryllium <br />Cadmium <br />Chromium <br />Nickel <br />QC Batch#: ME052898601OMDE <br />ME052898601OMDE <br />ME052898601OMDE <br />ME0528986010MOE <br />Analy. Method: EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />Prep. Method: EPA 3050 <br />EPA 3050 <br />EPA 3050 <br />EPA 3050 <br />Analyst: <br />C. Caoile <br />C. Caoile <br />C. Caoile <br />C. Caoile <br />MS/MSD #: <br />9805C9505 <br />9805C9505 <br />9805C9505 <br />9805C9505 <br />Sample Conc.: <br />N.D. <br />N.D. <br />N.D. <br />N.D. <br />Prepared Date: <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />Analyzed Date: <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />Instrument I.D.#: <br />MTJA5 <br />MTJA5 <br />MTJA5 <br />MTJA5 <br />Conc. Spiked: <br />50 mg/Kg <br />50 mg/Kg <br />50 mg/Kg <br />50 mg/Kg <br />Result: <br />41 <br />42 <br />77 <br />75 <br />MS % Recovery: <br />82 <br />84 <br />154 <br />150 <br />Dup. Result: <br />44 <br />46 <br />90 <br />87 <br />MSD % Recov.: <br />88 <br />92 <br />180 <br />174 <br />RPD: <br />7.1 <br />9.1 <br />16 <br />15 <br />RPD Limit: <br />0-20 <br />0-20 <br />0-20 <br />0-20 <br />LCS #: <br />BLK052898 <br />BLK052898 <br />BLK052898 <br />BLK052898 <br />Prepared Date: <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />Analyzed Date: <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />5/28/98 <br />Instrument I.D.#: <br />MTJA5 <br />MTJA5 <br />MTJA5 <br />MTJA5 <br />Conc. Spiked: <br />50 mg/Kg <br />50 mg/Kg <br />50 mg/Kg <br />50 mg/Kg <br />LCS Result: <br />50 <br />50 <br />51 <br />57 <br />LCS % Recov.: <br />100 <br />100 <br />102 <br />102 <br />80-120 80-120 80-120 80-120 <br />LCS 80-120 80-120 80-120 80-120 <br />Control Limits <br />SEQUOIA ANALYTICAL <br />Tod Granicher <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 9805GO6.GET <1 > <br />