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1 <br />' CASTLE ANALYTICAL LABORATORY - PORTERVILLE <br /> Environmental Testing Services 2780 Yowlumne Ave Suite C Phone (559)781-6099 <br />' Porterville,CA 93258 Fax (559)781-6091 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sample Prep Method SW3050 <br />' 937 Shaw Road Reference Number P190/6258 Analysis Method SW6010C <br /> Stockton, CA 95215 Sample Description SOIL Prepared 11-05-03 <br /> Attn Tim Cuellar Instrument 117 TJA 61E Analyzed 11-07-03 <br /> Reported 11-07-03 <br /> It— <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID ICP N053c <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> m /k mg/kg m /k %R <br /> COMPOUNDS <br /> Lead 5 0 ND 100 955% 80- 120 <br />' Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> m /kg %R %R <br />' COMPOUNDS <br /> Lead 200 859% 998% 1 70-130 747% <br /> I• <br /> I <br /> f <br /> f <br /> f <br /> f <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 batch results <br /> IAPPROVED BY <br /> Ja 9As C Phillips <br /> IL oratory Director <br />