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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 Station - Country Club Blvd - Stockton <br />4005 Port Chicago Hwy, Suite 200 Project Number: 63103 6009.00321320 Reported: <br />Concord CA, 94520 Project Manager: Scott Bittinger 02/09/24 15:56 <br />Volatile Organic Compounds by EPA Method 8260B - 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 24BO140 - EPA 5030 GCMS <br />Blank (24B0140-BLK1) <br />Prepared & Analyzed: 02/08/24 <br />Bromobenzene <br />ND <br />1.0 ug/1 <br />Bromochloromethane <br />ND <br />1.0 " <br />Bromodichloromethane <br />ND <br />1.0 <br />Bromoform <br />ND <br />1.0 <br />Bromomethane <br />ND <br />1.0 " <br />n-Butylbenzene <br />ND <br />1.0 <br />sec-Butylbenzene <br />ND <br />1.0 <br />tert-Butylbenzene <br />ND <br />1.0 " <br />Carbon tetrachloride <br />ND <br />0.50 <br />Chlorobenzene <br />ND <br />1.0 <br />Chloroethane <br />ND <br />1.0 <br />Chloroform <br />ND <br />1.0 <br />Chloromethane <br />ND <br />1.0 <br />2-Chlorotoluene <br />ND <br />1.0 " <br />4-Chlorotoluene <br />ND <br />1.0 <br />Dibromochloromethane <br />ND <br />1.0 <br />1,2-Dibromo-3-chloropropane <br />ND <br />2.0 " <br />1,2-Dibromoethane (EDB) <br />ND <br />1.0 <br />Dibromomethane <br />ND <br />1.0 <br />1,2 -Dichlorobenzene <br />ND <br />1.0 " <br />1,3 -Dichlorobenzene <br />ND <br />1.0 <br />1,4 -Dichlorobenzene <br />ND <br />1.0 <br />Dichlorodifluoromethane <br />ND <br />0.50 " <br />1,1-Dichloroethane <br />ND <br />1.0 <br />1,2-Dichloroethane <br />ND <br />0.50 <br />1,1-Dichloroethene <br />ND <br />1.0 " <br />cis-1,2-Dichloroethene <br />ND <br />1.0 <br />trans-l,2-Dichloroethene <br />ND <br />1.0 <br />1,2-Dichloropropane <br />ND <br />1.0 " <br />1,3-Dichloropropane <br />ND <br />1.0 <br />2,2-Dichloropropane <br />ND <br />1.0 <br />1,1-Dichloropropene <br />ND <br />1.0 " <br />cis- 1, 3 -Dichloropropene <br />ND <br />0.50 <br />trans-1,3-Dichloropropene <br />ND <br />0.50 <br />Hexachlorobutadiene <br />ND <br />1.0 " <br />Isopropylbenzene <br />ND <br />1.0 <br />SunStar Laboratories, Inc. 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 />Joann Marroquin, Director of Operations Page 6 of 12 <br />