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i <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 Top Filling Station Sample Prep Method SW3050 <br /> of Northern California Reference Number P132/5923 Analysis Method SW6010C <br />' 837 Shaw Road Sample Description SOIL Prepared 08-13-03 <br /> Stockton, CA 95215 Instrument ID TJA 61 E Analyzed 08-13-03 <br /> Attn Tim Cuellar Reported 08-18-03 <br />' QUALITY CONTROL DATA REPORT <br /> SPIKE ID ICP 8133 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> m /kg mglkg m !k %R <br />' COMPOUNDS <br /> Lead 50 ND 625 980% 80- 120 <br />' Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> mg/kg %R %R <br /> 1 COMPOUNDS <br /> Lead 625 988% 109% 70-130 500% <br /> lie <br /> 1 <br /> 1 <br /> I <br /> 1 <br /> 1 <br />' The LCS(Laboratory Control Spiked 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 /> 1 <br />' APPROVED BY <br /> ;Ja es,C hdlrps <br /> aboratory Director <br /> 1 <br />