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1 <br /> a <br /> CASTLE ANALYTICAL LABORATORY PORTERVILLE <br />' Environmental Testing Services 2780 Yow1umne Ave, Suite C Phone (559)781-6099 <br /> Portervrlle, CA 93258 Fax (559)781-6091 <br /> F <br /> dvanced GeoEnvironmental Inc Client Project ID Pacific Car Wash Sample Prep Method SW3050 <br /> 37 Shaw Road Reference Number P191 /6259 Analysis Method SW6010C <br /> tockton CA 95215 Sample Description SOIL Prepared 11-05-03 <br /> Attn Tim Cuellar instrument ID TJA 61E Analyzed 11-07-03 <br /> Reported 11-07-03 <br /> 1 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID ICP N053 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> m /k <br /> OMPOUND5 m Ili m !k %R <br /> C <br /> Lead 50 ND 100 935% 80-120 <br /> Spiking MATRIX MATRIX %R °/aRP❑ <br /> Level SPIKE SPIKE DUP Limits <br /> m Ili %R %R <br /> COMPOUNDS <br /> Lead100 98()% 725% 70- 130 148% <br /> 1 <br /> I <br /> I The LCS(Laboratory Control Spike)is a control sample of known interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents,preparation and analytical methods employed for the samples The LCS%recovery is used for validation <br /> of sample batch results Due to matrix effects the QC limits and recoveries for MSIMSD s are advisory only and are not used to accept or <br /> reject hatch results <br /> G(,/APPROVED BY <br /> Jam Phillips <br /> IL oratory Director <br />