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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 <br /> Phone: (209) 384-2930 <br />Certificate No. 2480 <br /> Fax: (209) 500-1848 <br />Total Petroleum Hydrocarbons by GC - Quality Control <br />Castle Analytical Laboratory <br />Analyte <br />Reporting <br />Result Limit Units <br />Spike Source <br />Level Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch B205090 - CATPH-D <br />Blank (B205090-BLK1) Prepared & Analyzed: 05/27/22 <br />Surrogate: o-Terphenyl 0.363 mg/kg 0.348 104 70-130 <br />Diesel Range Organics (C10-C24) ND 1.0 <br />Motor Oil Range Organics (C24-C40) ND 2.0 <br />LCS (B205090-BS1) Prepared & Analyzed: 05/27/22 <br />Surrogate: o-Terpherryl 0.333 mg kg 0.348 95.7 70-130 <br />Diesel Range Organics (C10-C24) 5.66 1.0 5.00 113 70-130 <br />Matrix Spike (B205090-MS1) Source: 2205105-01 Prepared & Analyzed: 05/27/22 <br />Surrogate: o-Terphenyl 0.327 mekg 0.348 93.9 70-130 <br />Diesel Range Organics (C10-C24) 5.27 1.0 5.00 ND 105 70-130 <br />Matrix Spike Dup (B205090-MSD1) Source: 2205105-01 Prepared & Analyzed: 05/27/22 <br />Surrogate: o-Terphenyl 0.325 mg/kg 0.348 93.4 70-130 <br />Diesel Range Organics (C10-C24) 5.17 1.0 5.00 ND 103 70-130 1.84 20 <br />AAA- LOW.. <br />Clan i J. Cone - Technical Manager <br />Page 4 of 6