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CALIFORNIA LABORATORY SERVICES <br /> Committed. Responsive. Flexible. <br /> Page 3 of 4 03/10/2611:43 <br /> Precision Enviro-Tech Project: 1200 Woodbridge Rd.-Shibbler <br /> I3935 N.Coronado Ave Project Number: [nonel CLS Work Order#:26B1365 I <br /> Stockton,CA 95204 Project Manager: Jonathan HV Lee COC#: <br /> EDB and DBCP by EPA Method 504.1 -Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result °/.REC Limits RPD Limit Notes <br /> Batch 2601565-EPA 504.1 <br /> Blank(2601565-BLKI) Prepared&Analyzed:02/27/26 <br /> Ethylene dibromide ND 0.020 µg/L <br /> 1,2-Dibromo-3-chloropropane ND 0.010 " <br /> LCS(2601565-BS1) Prepared&Analyzed:02/27/26 <br /> Ethylene dibromide 0.254 0.020 µg/L 0.286 89 70-130 <br /> 1,2-Dibromo-3-chloropropane 0.310 0.010 0.286 108 70-130 <br /> LCS Dup(2601565-BSD1) Prepared&Analyzed:02/27/26 <br /> Ethylene dibromide 0.254 0.020 µg/L 0.286 89 70-130 0.08 30 <br /> 1,2-Dibromo-3-chloropropane 0.296 0.010 0.286 103 70-130 5 30 <br /> 3249 Fitzgerald Road.Rancho Cordova,CA 95742 1 800.638.7301 Tel:916.638.7301 x102 d Fax:916.638.4510 I www.coffornicdab.com <br /> Small Business#2916 1 ELAP#1233 1 NAICS#541380 1 CA SWRCB FLAP Accreditation/Registration Number 1233 <br /> For regulatory purposes,please refer to _ to find a list of approved analytes by method. <br /> Page 4 of 5 Page 6 Of 7 <br />