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Excelchem Laboratories, Inc. Ancon Environmental 570 Business Park Dr. Lincoln, CA 95678 Project: Stockton Custard Project Number: 1061985 Project Manager: Nolan Ryan Date Reported: 08/15/22 10:20 Total Petroleum Hydrocarbons by FID - Quality Control Analyte Remrtiitng Spike Source %REC Result Units Level Result %REC Limits RPD RPD Limit Notes Batch A'G0206 - EPA 8015Mod Blank (A'G0206-BLK1) Prepared: 07/27/22 Analyzed: 07/29/22 TPH as Diesel TPH as Motor Oil LCS (KG0206-BS1) ND 1.00 mg/kg ND 10.0 Prepared: 07/27/22 Analyzed: 07/29/22 TPH as Diesel TPH as Motor Oil LCS (KG0206-BS2) 45.2 1.00 mg/kg 100 45.2 40-160 1,1 ND 10.0 40-160 Prepared: 07/27/22 Analyzed: 07/29/22 TPH as Diesel TPH as Motor Oil LCS Dup (AT.0206-BSD1) ND 1.00 mg/kg 40-160 52.6 10.0 100 52.6 40-160 Prepared: 07/27/22 Analyzed: 07/29/22 TPH as Diesel TPH as Motor Oil LCS Dup (KG0206-BSD2) 50.7 1.00 mg/kg 100 50.7 40-160 ND 10.0 40-160 Prepared: 07/27/22 Analyzed: 07/29/22 11.4 40 30 TPH as Diesel TPH as Motor Oil Matrix Spike (A'G0206-MS1) ND 1.00 mg/kg 40-160 49.6 10.0 100 49.6 40-160 Source: 2207184-01 Prepared: 07/27/22 Analyzed: 07/29/22 5.92 40 30 TPH as Diesel TPH as Motor Oil Matrix Spike Dup (A'G0206-MSD1) 42.0 1.00 mg/kg 100 6.11 35.9 40-160 ND 10.0 21.5 40-160 Source: 2207184-01 Prepared: 07/27/22 Analyzed: 07/29/22 TPH as Diesel TPH as Motor Oil 46.1 1.00 mg/kg 100 6.11 40.0 40-160 ND 10.0 21.5 40-160 9.14 40 30 Exceichem Laboratories. 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. Laboratory Representative Page 3 of 5