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' Sequoia P ty,680 Chesapeake Drive Redwood Ce CA 94063 (415) 364 9600 FAX(415)364-9233 <br /> 404 N Wiget Lane Walnut Cn:ck CA 94548 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(9 16)921 0100 <br /> 1 f61 efder vv `611ent'Project b 2U-3941-01 501 ry <br /> 2825 East Myrtle St Matrix Soil <br /> Stockton, CA 95205 <br /> Attention Tony Martin QC Sample Group 7030697-736 Reported Mar 27, 1997° <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead Diesel <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 DHS LUFT <br /> Analyst C Lee C Lee C Lee C Lee K Marchand C Lee <br /> Concentration <br /> Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg 50 mg/kg 7 5 mg/kg <br /> LCS Batch# LCSD32197 LCS032197 LCS032197 LCS032197 LCS032497 LCS032497 <br /> Date Prepared. 03/21/97 03/21/97 03/21/97 03/21/97 03/24/97 03/24/97 <br /> Date Analyzed. 03/21/97 03/21/97 03/21/97 03/21/97 03/25/97 03/25/97 <br /> Instrument LD# GCHP-1 GCHP-1 GCHP-1 GCHP-1 ICP-1 GCHP-3B <br /> LCS% <br /> Recovery 85 90 96 94 98 99 <br /> Control Limits. 70-130 70-130 70.130 70-130 80-120 60-140 <br /> ' MS/MSD <br /> Batch#: 7030699 7030699 7030699 7030699 7030736 7030697 <br /> ' Date Prepared: 03/21/97 03/21/97 03/21/97 03/21/97 03/24/97 03/24/97 <br /> Date Analyzed 03/21/97 03/21/97 03/21/97 03/21/97 03/25/97 03/25/97 <br /> Instrument I D #: GCHP-1 GCHP-1 GCHP-1 GCHP-1 1CP-1 GCHP-3B <br /> Matrix Spike <br /> % Recovery: 91 93 100 98 96 113 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 84 88 96 94 96 103 <br /> ' Relative% <br /> Difference: 8 0 5 5 41 42 00 9 2 <br /> EQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that is anatyzed using the same reagents, <br /> 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 /> Edana M ruciano and are not used to acceptor reject batch results <br /> Project Manager/Sacramento Labors ory <br /> ' 7030697 KLF <15> <br />