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' 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 Geo Environmental, Inc Client Project IO Pacific Car Wash Sample Prep Method SW3050 <br />' of Northern California Reference Number P134/5947 Analysis Method SW6010C <br /> 837 Shaw Road Sample Description SOIL Prepared 08-13-03 <br /> Stockton,CA 95215 Instrument ID TJA 61E Analyzed 08-14-03 <br /> Attn Tim Cuellar Reported 08-18-03 <br />' QUALITY CONTROL DATA REPORT <br />' SPIKE 1D ECP 8133 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br />' <br /> m-q/kg m-/kgm fk mg/kg %R <br /> COMPOUNDS <br /> Lead 50 ND 625 980% 80-120 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> m !k %R %R <br />' COMPOUNDS <br /> Lead 625 988% 109% 70-130 500% <br />' 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 /> relect batch results <br /> APPROVED BY <br /> Ja es C Phillips <br /> 6oratory Director <br /> I <br />