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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 />Project Manager: Drew Feucht 08/23/21 14:28 <br />Fl-Comp <br />2108096-12 (Solid) <br />Analyse Result <br />Reporting <br />Limit Units Batch <br />Date <br />Prepared <br />Date <br />Analyzed Method Notes <br />PCBs by GC/ECD <br />Aroclor 1016 ND 0.0500 mg/kg A_H0170 08/19/21 08/20/21 PCBs BY EPA 8082 <br />Aroclor 1221 ND 0.0500 11 <br />Aroclor 1232 ND 0.0500 /I 11 <br />Aroclor 1242 ND 0.0500 <br />Aroclor 1248 ND 0.0500 <br />Aroclor 1254 ND 0.0500 It <br />Aroclor 1260 ND 0.0500 <br />Surrogate: Decachlorobiphenyl 74.7 % % Recovery Limits 50-150 <br />Surrogate: Tetrachlow-meta-zylene 55.4 % % Recovery Limits 50-150 <br />Geophysical <br />Moisture 0.778 0.100 % A_H0173 08/12/21 08/20/21 % moisture <br />F,xcelchem Laboratories. Inc. <br /> <br />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 /> <br />Laboratory Representative Page 13 of 31