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Excelehem Laboratories, Inc. <br />Arcadis <br />101 Creeksdie Ridge Court Suite 200 <br />Rio Oso, CA 95678 <br />Project: Stockton transformer <br />Project Number: 30101128.0002 <br />Project Manager: Drew Feucht <br />Date Reported: <br />08/23/21 14:28 <br />PCBs by GC/ECD - Quality Control <br />Analyte Result <br />Re_porting Spike Source %REC <br />Limit Units Level Result %REC Limits RPD <br />RPD <br />Limit Notes <br />Batch A 110098 - EPA 8082 <br />Blank (A_H0098-BLIC1) Prepared: 08/12/21 Analyzed: 08/13/21 <br />Surrogate: Decachlorobiphenyl 0.289 ugh! 0.400 72.2 50-150 <br />Aroclor 1016 <br />Aroclor 1221 <br />Aroclor 1232 <br />Aroclor 1242 <br />Aroclor 1248 <br />Aroclor 1254 <br />Aroclor 1260 <br />LCS (A_H0098-BS1) <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />1.00 <br />1.00 <br />1.00 <br />1.00 <br />1.00 <br />1.00 <br />1.00 <br />Prepared: 08/12/21 Analyzed: 08/13/21 <br />Surrogate: Decachlorobiphenyl 0.382 ug/7 0.400 95.6 50-150 <br />Aroclor 1260 <br />LCS Dup (A_H0098-BSD1) <br />15.9 1.00 20.0 79.3 50-150 <br />Prepared: 08/12/21 Analyzed: 08/13/21 <br />Surrogate: Decachlon9biphenyl 0.430 uel 0.400 108 50-150 <br />Aroclor 1260 <br />Batch A H0132 - PCBs BY EPA 8082 <br />16.9 1.00 20.0 84.7 50-150 6.59 50 <br />Blank (A_H0132-BLK1) Prepared: 08/18/21 Analyzed: 08/19/21 <br />Surrogate: Decachlorobiphenyl 0.0168 mg/kg 0.0200 83.9 50-150 <br />Surrogate: Tetrachloro-meta-xylene 0.0148 0.0200 74.0 50-150 <br />Aroclor 1016 <br />Aroclor 1221 <br />Aroclor 1232 <br />Aroclor 1242 <br />Aroclor 1248 <br />Aroclor 1254 <br />Aroclor 1260 <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />0.0500 <br />0.0500 <br />0.0500 <br />0.0500 <br />0.0500 <br />0.0500 <br />0.0500 <br />Excelchem Laboratories. Inc. The results in this report apply to the samples analyzed in accordance with the chain of <br />^ custody document. This analytical report must be reproduced in its entirety. <br />Laboratory Representative Page 26 of 31