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i <br />' CASTLE ANALYTICAL LABORATORY - PORTERVILLE <br /> Environmental Testing Services 2780 Yowlumne Ave, Suite C Phone {559)781-6D99 <br />' Porterville CA 93258 Fax (559)781-6091 <br /> Advanced Geo Environmental, Inc Client Project ID Pacific Car Wash Sample Prep Method SW3050 <br /> 937 Shaw Road Reference Number P18716241 Analysis Method SW6010C <br />' Stockton,CA 95215 Sample Description SOIL Prepared 11-0503 <br /> Attn Tim Cuellar Instrument ID TJA fit E Analyzed 11-07-03 <br /> Lab Numbers P187-(1S-5S) Reported 11-07-03 <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 50 ND 100 955% 80-120 <br /> Spiking MATRIX MATRIX 7 %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> mg/k %R %R <br />' COMPOUNDS <br /> Lead 200 859% 998% 70-130 747% <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 MS/MSD s are advisory only and are not used to accept or <br /> reject batch results <br /> ' APPROVED B <br /> S C Phillips <br /> oratory Director <br />