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Excelchem Laboratories, Inc. <br />Arcadis Project: Stockton transformer <br />101 Creeksdie Ridge Court Suite 200 <br />Project Number: 30101128.0002 <br />Date Reported: <br />Rio Oso, CA 95678 <br /> <br />Project Manager: Drew Feucht <br />08/23/21 14:28 <br />BlF <br />2108096-07 (Solid) <br />Reporting Date Date <br />Acolyte Result Limit Units Batch Prepared Analyzed Method Notes <br />PCBs by GC/ECD <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 />0.617 mg/kg A_H0132 08/17/21 08/19/21 <br />0.617 <br />0.617 <br />0.617 <br />0.617 <br />0.617 <br />0.617 <br />PCBs BY EPA 8082 <br />Surrogate: Decachloroblphenyl 21.3 % % Recovery Limits 50-150 <br /> <br />5-06 <br />Surrogate: Tetrachlora-meta-xylene 36.5 % % Recovery Limits <br />50-150 <br /> <br />S-06 <br />Geophysical <br />Moisture 0.230 0.100 A_H0173 08/12/21 08/20/21 % moisture <br />Excelchem I ,aboratories. Inc. The results in this report apply to the samples analyzed in accordance with the chain of ^ • custody document. This analytical report must be reproduced in its entirety. <br />Laboratory Representative <br /> Page 8 of 31