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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 RPD <br />Analyte Result MDL Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch B112060 - EPA 3550B <br />Blank (B112060-BL1C1) <br />Prepared & Analyzed: 12/06/21 <br /> <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1221 <br />Aroclor-1232 <br />Aroclor-1242 <br />Aroclor-1248 <br />Aroclor-1254 <br />Aroclor-1260 <br />Aroclor-1268 <br />LCS (B112060-BS1) <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1260 <br />LCS Dup (B112060-BSD1) <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1260 <br />Matrix Spike (B112060-MS1) <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1260 <br />Matrix Spike Dup (B112060-MSD1) <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1260 <br />0.0407 mg/kg wet 0.0400 102 60-140 <br />ND 0.020 0.050 <br />ND 0.050 0.050 <br />ND 0.020 0.050 <br />ND 0.020 0.050 <br />ND 0.020 0.050 <br />ND 0.010 0.050 <br />^ ND 0.010 0.050 <br />ND 0.010 0.050 <br />Prepared & Analyzed: 12/06/21 <br />0.0414 mg/kg wet 0.0400 104 60-140 <br />0.396 0.020 0.050 0.400 99.1 70-130 <br />0.441 0.010 0.050 0.400 110 70-130 <br />Prepared & Analyzed: 12/06/21 <br />0.0417 mg/kg wet 0.0400 104 60-140 <br />0.396 0.020 0.050 0.400 99.1 70-130 0.00 20 <br />0.442 0.010 0.050 0.400 111 70-130 0.362 20 <br />Source: 2112016-02 Prepared & Analyzed: 12/06/21 <br />0.0467 mg/kg thy 0.0451 104 60-140 <br />0.419 0.023 0.056 0.451 ND 92.9 70-130 <br />0.472 0.011 0.056 0.451 ND 105 70-130 <br />Source: 2112016-02 Prepared & Analyzed: 12/06/21 <br />0.0467 mg/kg thy 0.0451 104 60-140 <br />0.423 0.023 0.056 0.451 ND 93.8 70-130 0.964 20 <br />0.472 0.011 0.056 0.451 ND 105 70-130 0.00 20 <br />L/1.4LOAA' CefitLd <br />Clan i J. Cone / Technical Manager <br />Page 4 of 6