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SunStar <br />Laboratories, Inc. <br />PROVIDING QUALITY ANALYTICAL SERVICES NATIONWIDE <br />25712 Commercentre Drive <br />Lake Forest, California 92630 <br />949.297.5020 Phone <br />949.297.5027 Fax <br />Aptim - Concord Project: Safeway Fuel Station No. 1769, Stockton, CA <br />4005 Port Chicago Hwy, Suite 200 Project Number: 631036009.00321320 Reported: <br />Concord CA, 94520 Project Manager: Scott Bittinger 02/15/24 16:16 <br />Metals by EPA 6010B - Quality Control <br />SunStar Laboratories, Inc. <br />Reporting Spike Source %REC RPD <br />analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 24BO241 - EPA 3050B <br />Blank (24B0241-BLK1) Prepared: 02/14/24 Analyzed: 02/15/24 <br />Lead ND 3.0 mg/kg <br />LCS (24B0241 -BSI) Prepared: 02/14/24 Analyzed: 02/15/24 <br />Lead 94.0 3.0 mg/kg 100 94.0 75-125 <br />Matrix Spike (24B0241-MS1) Source: T240734-01 Prepared: 02/14/24 Analyzed: 02/15/24 <br />Lead 61.5 3.0 mg/kg 100 3.64 57.8 75-125 QM -07 <br />Matrix Spike Dup (24B0241-MSD1) Source: T240734-01 Prepared: 02/14/24 Analyzed: 02/15/24 <br />Lead 70.7 3.0 mg/kg 100 3.64 67.1 75-125 14.0 20 QM -07 <br />SunStar Laboratories, Inc. <br />Joann Marroquin, Director of Operations <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 />Page 6 of 12 <br />