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I <br />' CASTLE ANALYTICAL LABORATORY O Y - <br /> 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 P188/6242 Analysis Method SW6010C <br /> Stockton 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 /> I <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID ICP N053c <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> mg/kg mg/kg mg/kg %R <br /> COMPOUNDS <br /> Lead 50 ND 100 955% 80- 120 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> I mg/kg %R %R <br /> COMPOUNDS <br /> Lead 200 859% 998% 70- 130 <br /> I <br /> I The I-CS(Laboratory Control Spike)is a contrai 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 matnx effects the QC limits and recoveries for MS/MSDs are advisory only and are not used to accept or <br /> reject batch results <br /> APPROVED BY <br /> Ja hrllrps <br /> Ioratory Director <br />