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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 <br /> <br />Phone: (209) 384-2930 <br />Certificate No. 2480 Fax: (209) 500-1848 <br />Total Petroleum Hydrocarbons by GC - Quality Control <br />Castle Analytical Laboratory <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch B210030 - CATPH-D <br />Blank (B210030-BLK1) <br />Prepared: 10/10/22 Analyzed: 10/11/22 <br />Surrogate: o-Terphenyl <br />Diesel Range Organics (C10-C24) <br />Motor Oil Range Organics (C24-C40) <br />LCS (B210030-BS1) <br />Surrogate: o-Terphenyl <br />Diesel Range Organics (C10-C24) <br />LCS Dup (B210030-BSD1) <br />Surrogate: o-Terphenyl <br />Diesel Range Organics (C10-C24) <br />0.428 mgkg 0.400 107 70-130 <br />ND 10 <br />ND 2,0 <br />Prepared & Analyzed: 10/10/22 <br />0.477 mg/kg 0.400 119 70-130 <br />4.73 1.0 5.00 94.6 70-130 <br />Prepared & Analyzed: 10/10/22 <br />0.487 mg,/kg 0.400 122 70-130 <br />5.02 1.0 5.00 100 70-130 5.88 20 <br />Ututi.:() y Lou. <br />Clan i J. Cone - Technical Manager <br />Page 4 of 7