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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 />Polychlorinated Biphenyls (PCBs) by GC - Quality Control <br />Castle Analytical Laboratory <br />Reporting Spike Source %REC RI'!) <br />Analyte Result MDL Limit Units Level Result %REC hints RI'!) Limit Notes <br />Batch B108080 - EPA 3550B <br />LCS (B108080-1351) Prepared: 08/30/21 Analyzed: 08/31/21 <br />Surrogate: 2,9,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1260 <br />LCS Dup (B108080-BSD1) <br /> <br />0.0452 mg/kg wet <br /> <br />1.05 0.016 0.050 <br /> <br />0.403 0.0080 0.050 <br /> <br />0.0400 113 60-140 <br /> <br />0.800 131 70-130 <br /> <br />0.400 101 70-130 <br />Prepared: 08/30/21 Analyzed: 08/31/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 0.0444 mg/kg wet 0.0400 111 60-140 <br />Aroclor-1016 1.03 0.016 0.050 " 0.800 128 70-130 1.81 20 <br />Aroclor-1260 0.398 0.0080 0.050 i, 0.400 99.6 70-130 1.20 20 <br />Matrix Spike (B108080-MS1) Source: 2108101-26 Prepared: 08/30/21 Analyzed: 08/31/21 <br />Surrogate: Tetrachloro-m-xylene 0.0487 mg/kg dry 0.0437 112 60-140 <br />Arocl or-1016 1.08 0.017 0.050 0.874 ND 123 70-130 <br />Aroclor-1260 0.479 0.0087 0.050 t, 0.437 0.0415 100 70-130 <br />Matrix Spike Dup (B108080-MSD1) Source: 2108101-26 Prepared: 08/30/21 Analyzed: 08/31/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 0.0487 mg/kg dry 0.0437 111 60-140 <br />Arocl or-1016 1.08 0,017 0.050 0.874 ND 123 70-130 0.243 20 <br />Aroclor-1260 0.489 0.0087 0.050 ii 0.437 0.0415 102 70-130 1.99 20 <br />Clan i J. Cone / Technical Manager <br />Page 18 of 21