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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 />ERM Project: Stockton SMF3 <br />2525 Natomas Park Drive, Suite 350 Project Number: 0567141 Reported: <br />Sacramento CA, 95833 Project Manager: Alan Leung 09/29/20 16:11 <br />Cold Vapor Extraction EPA 7470/7471- 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 0092140 - EPA 7471A Soil <br />Blank (0092140-BLK1) <br />Prepared: 09/21/20 Analyzed: 09/25/20 <br />Mercury <br />ND 0.10 mg/kg <br />LCS (0092140 -BSI) <br />Prepared: 09/21/20 Analyzed: 09/25/20 <br />Mercury <br />0.358 0.10 mg/kg <br />0.397 90.2 80-120 <br />Matrix Spike (0092140-MS1) <br />Source: T203344-03 <br />Prepared: 09/21/20 Analyzed: 09/25/20 <br />Mercury <br />0.350 0.10 mg/kg <br />0.403 ND 86.8 75-125 <br />Matrix Spike Dup (0092140-MSD1) <br />Source: T203344-03 <br />Prepared: 09/21/20 Analyzed: 09/25/20 <br />Mercury <br />0.352 0.10 mg/kg <br />0.417 ND 84.4 75-125 0.530 20 <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 7 <br />