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1 i <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br />• h..................................... <br /> Industries Client Project ib. Arco#548, Stockton <br /> :3164 Gold Camp Dr., Suite 200 Matrix: Soil <br /> Rancho Cordova, CA 95570 <br /> :Attention: Greg Altimari OC Sample Group: 304-0005 Reported: Apr 6, 1993:.. <br />•' <br /> QUALITY CONTROL DATA REPORT <br /> ' ANALYTE <br /> Cyanide R-Sulfide Beryllium Cadmium Chromium Nickel <br /> 0 <br /> Method: EPA 9010 EPA 9030 EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Analyst: A.Savva K.Follett C. Medefesser C. Medefesser C. Medefesser C.Medefesser <br /> Concentration <br /> Spiked: 0.17 mg/L 10 mg/kg 5.0 mg/L 5.0 mg/L 5.0 mg/L' <br /> 5.0 mg/L <br /> 0 LCS Batch#: LCSO40593 LCSO40293 M1040193A M1040193A M1040193A M1040193A <br /> Date Prepared: 4/5/93 4/2/93 4/1/93 4/1/93 4/1/93 4/1/93 <br /> Date Analyzed 4/5/93 4/2/93 4/3/93 4/3/93 4/3/93 4/3/93 <br /> Instrument LD.#: N/A N/A MTSA-2 MTSA-2 MTSA-2 MTSA-2 <br /> LCS % <br /> Recovery: 82 110 101 102 103 105 <br /> Control Limits: 80.120 80-120 90-110 90-110 90-110 90-110 <br /> MS/MSD <br /> Batch #: 9303E33 9304004 9302CS1-01 9302CS1-01 9302CS1-01 9302CS1-01 <br /> Date Prepared: 4/1/93 4/2/93 4/1/93 4/1/93 4/1/93 4/1/93 <br /> Date Analyzed 4/1/93 4/2/93 4/3/93 4/3/93 4/3/93 4/3/93 <br />• Instrument I.D.#: N/A N/A MTSA-2 MTSA 2 MTSA-2 MTSA-2 <br /> Matrix Spike <br /> % Recovery: 100 108 110 100 107 106 <br /> Matrix Spike <br /> Duplicate % <br />• Recovery: 95 123 102 93 100 99 <br /> Relative% <br /> Difference: 5.1 13 7.5 7.3 7.1 7.4 <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 CC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results. <br />• ichael R- Giles <br /> laboratory Director <br /> 3040005.RES <6> <br />