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Sequoia 680 Chesapeake Drive Redwood City,CA A (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> ................. <br /> Kielinfelder Client Project to. - -26-3978L01%WIR6 Soreckles <br /> 2825 East Myrtle St. Matrix: Soil <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group: 7010355-62 Reported: Jan 27, 1997.- <br /> ...................... ....... <br /> M., .. .... <br /> .............................. ...... <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Mercury Mercury Cadmium Chromium Lead Nickel Arsenic <br /> Method: EPA 7471 EPA 7471 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Analyst: W.T. W.T. K.Barta K.Berta K.Berta K.Barta K.Barta. <br /> Concentration <br /> Spiked: 0,40 mg/kg 0.40 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg <br /> LCS Batch#: LCS012097 LCS01 1797 LCS01 1797 LCS01 1797 LCS01 1797 LCS01 1797 LCS01 1797 <br /> Date Prepared: 01/20/97 01/17/97 01/17/97 01/17/97 01/17/97 01/17/97 01/17/97 <br /> Date Analyzed: 01/21/97 01/17/97 01/23/97 01/23/97 01/23/97 01/23/97 01/23/97 <br /> Instrument I.D.#: MPE-4 MPE-4 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 <br /> LCS % <br /> Recovery: 85 80 95 98 97 98 94 <br /> Control Limits: 75-125 75-125 80-120 80120 80-120 80-120 80-120 <br /> .......... <br /> .1.1. ........... <br /> W: <br /> N, <br /> 'A S NEW" <br /> ............... <br /> MS/MSD <br /> Batch #: 9701859-01 9701828-01 7010569 7010569 7010569 7010569 7010569 <br /> Date Prepared: 01/20/97 01/17/97 01/17/97 01/17/97 01/17/97 01/17/97 01/17/97 <br /> Date Analyzed: 01/21/97 01/17/97 01/23/97 01/23/97 01/23/97 01/23/97 01/23/97 <br /> Instrument I.D.#: MPE-4 MPE-4 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 <br /> Matrix Spike <br /> % Recovery: 74 71 80 58 79 65 69 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 64 64 81 67 78 73 75 <br /> Relative% <br /> Difference: 13 9.5 1.2 14 1.3 12 8.3 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> validation of sample batch results. Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> aAlA M . �- and are not used to accept or reject batch results. <br /> Edana M. Belschner <br /> Project Manager/Sacramento Laboratory <br /> 7010362.KLF <4> <br />