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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 13202053 - CATPH-D <br />Blank (B202053-BLK1) Prepared & Analyzed: 02/07/22 <br />Surrogate: o-Terpherryl 0.419 mg/kg 0.400 105 60-130 <br />Diesel Range Organics (C10-C28) ND 1.0 <br />LCS (B202053-BS1) Prepared & Analyzed: 02/07/22 <br />Surrogate: o-Terphenyl 0.474 mg kg 0.400 118 60-130 <br />Diesel Range Organics (C10-C28) 5.35 l.0 5.00 107 70-130 <br />Matrix Spike (B202053-MS1) Source: 2202005-02 Prepared & Analyzed: 02/07/22 <br />Surrogate: o-Terphenyl 0.409 mg/kg 0.400 102 60-130 <br />Diesel Range Organics (C10-C28) 4.74 1.0 5.00 ND 94.8 60-130 <br />Matrix Spike Dup (B202053-MSD1) Source: 2202005-02 Prepared & Analyzed: 02/07/22 <br />Surrogate: o-Terphenyl 0.406 mg/kg 0.400 101 60-130 <br />Diesel Range Organics (C10-C28) 4.80 1.0 5.00 ND 96.1 60-130 1.26 20 <br />(me__ <br />Clan i J. Cone - Technical Manager <br />Page 4 of 6